CN114515548A - Feeding control device and control method - Google Patents
Feeding control device and control method Download PDFInfo
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- CN114515548A CN114515548A CN202011279103.8A CN202011279103A CN114515548A CN 114515548 A CN114515548 A CN 114515548A CN 202011279103 A CN202011279103 A CN 202011279103A CN 114515548 A CN114515548 A CN 114515548A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 85
- 238000000746 purification Methods 0.000 claims abstract description 32
- 230000006698 induction Effects 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000843 powder Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012840 feeding operation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000028571 Occupational disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/442—Auxiliary equipment or operation thereof controlling filtration by measuring the concentration of particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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Abstract
The invention discloses a feeding control device and a method, wherein the control device comprises: the whole sealed feeding unit is a sealed space, the lower part of the sealed space is connected with a reaction kettle pipeline, and a feeding port with adjustable area and an induction device are arranged on the feeding end surface; the dust collecting unit is communicated with the sealed feeding unit through the opposite side surface of the feeding end surface and is used for collecting dissipated dust; the purification unit comprises a dust remover, a variable frequency fan and an air volume adjusting valve; the purification unit receives the dust from the dust collecting unit and controls the operation of the variable frequency fan according to the calculated air volume to finish dust removal and purification. The device and the method can improve the dust collecting efficiency, and the air quantity of the variable-frequency fan is adjusted according to the opening and closing angle (or height) of the feeding door, so that the environment protection and the energy saving are realized, and the dust control effect is ensured.
Description
Technical Field
The invention relates to the technical field of chemical feeding, in particular to an automatic induction type feeding control device and method applicable to dust escape collection during feeding.
Background
At present, the automation level of powder feeding operation in the chemical industry is not high, an operation post for manual feeding is ubiquitous, and the instantaneous reverse dusting of dust concentration in the solid powder feeding process is large, so that the method is a key link for rectifying and modifying the hidden danger that the dust concentration exceeds the standard. In the process of enterprise health hidden trouble investigation and rectification, corresponding rectification measures are taken by an enterprise, but expected effects are not obtained, and the problems or technical difficulties exist as follows: 1) the individual dust exposure concentration of an operator depends on the field dust concentration and the operation mode of the operator, wherein the field powder operation points are in a more non-closed condition, so that the local dust concentration is higher; 2) the powder leakage condition is common in operation points adopting sealing devices (such as a three-side enclosure structure), and the individual exposure concentration of workers is high due to secondary dust; the powder feeding is intermittent feeding, and the dust catching and air exhausting system is always in a closed state due to energy consumption, so that the exposure concentration of individual dust of workers exceeds the standard; 3) the conventional exhaust system generally has a fixed air volume, and when the area of a feeding port is increased, the control speed of dust is reduced, the control distance is shortened, and the dust dissipation amount is increased. The above problems existing in the feeding process greatly increase the risk of occupational diseases of workers.
In the prior art, for example, chinese patent application CN107386058A provides a rock asphalt feeding device and a feeding system, and belongs to the technical field of rock asphalt construction. The device comprises an air supply power module, a feeding pipeline, a collecting and metering module and an electric control module; the air supply power module is connected with the feeding module and is used for conveying wind power to the feeding module; one end of the feeding pipeline is connected with the feeding module, and the other end of the feeding pipeline is connected with the collecting and metering module; the electric control module is respectively electrically connected with the air supply power module, the feeding module and the collecting and metering module, and is used for controlling the opening or closing of the air supply power module, the feeding module and the collecting and metering module. The feeding system is provided with the rock asphalt feeding device.
Similar to the existing feeding device and feeding system, the air quantity can not be controlled according to the change of feeding concentration, and the problems of hidden danger and energy consumption caused by intermittent feeding can not be solved. Therefore, there is a need for an automatic induction type feeding control device and method for collecting dust escaping during feeding, so as to solve the above-mentioned problems in the prior art.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an automatic induction type feeding control device and a control method which can be applied to dust escape collection during feeding, so that a relatively closed space of a dust environment is provided, and the air volume of a fan can be adjusted according to different dust concentrations.
To achieve the above object, according to a first aspect of the present invention, there is provided a charging control apparatus comprising: the whole sealed feeding unit is a sealed space, the lower part of the sealed space is connected with a reaction kettle pipeline, and a feeding port with adjustable area and an induction device are arranged on the feeding end surface; the dust collecting unit is communicated with the sealed feeding unit through the opposite side surface of the feeding end surface and is used for collecting dissipated dust; the purification unit comprises a dust remover, a variable frequency fan and an air volume adjusting valve; the purification unit receives dust from the dust trapping unit and controls the operation of the variable frequency fan according to the calculated air volume to finish dust removal and purification.
Further, in the above technical solution, the sensing device may select an infrared detector.
Furthermore, in the above technical scheme, the dog-house accessible limit switch controls the opening degree of vertical lift-draw door. The limit switch may include: the first limit switch automatically controls the lifting door to move upwards to the position of the first limit switch to stop when the infrared detector senses that an operator approaches the feed inlet to prepare for feeding; and the second limit switch is used for manually adjusting the lifting door to stop at the position of the second limit switch by an operator when the area of the feeding port needs to be increased.
Further, in the above technical solution, the microcomputer chip includes: the control identification unit is used for controlling the emission unit of the infrared detector to emit infrared rays and receiving and identifying the amplified and analog-to-digital converted digital signals from the infrared detector receiving unit; and the opening control unit is used for automatically controlling the lifting door to move upwards to the position of the first limit switch to stop. The microcomputer chip may further include: the data acquisition unit is used for acquiring the opening and closing height of the lifting door at the first limit switch position and/or the second limit switch position; and the calculating unit is used for calculating the air quantity F required by the dust trapping unit according to the acquired opening and closing height data and converting the air quantity F value into the output frequency of the corresponding variable frequency fan.
Further, in the above technical solution, the calculation formula of the air volume F is: f ═ 0.75(10 x)2+ L × H) 3600; wherein x is the distance from the lifting door to the blanking central point; l is the opening and closing length of the lifting door; h is the opening and closing height of the lifting door.
Further, in the above technical solution, the microcomputer chip may further include: and the program controller is used for driving the variable frequency fan to operate through the driving circuit according to the output frequency of the variable frequency fan calculated by the calculating unit so as to finish dust removal and purification.
Further, in the above technical solution, the dust trapping unit includes: a trap cover which is a square round cover with one side end face being square and the other side end face being round; and the first air volume adjusting valve is arranged on the air pipe pipeline between the trapping cover and the purification unit.
Further, in the above technical scheme, a second air volume adjusting valve is arranged on a pipeline between the dust remover and the variable frequency fan in the purification unit.
To achieve the above object, according to a second aspect of the present invention, there is provided a charge control method including the steps of: the lifting door of the feeding port is opened to a first limit position by sensing an operator to be fed; the lost dust collected after feeding is subjected to purification treatment through the driving of the variable frequency fan in the purification unit, and the purification unit controls the operation of the variable frequency fan according to the calculated air volume to complete dust removal and purification.
Further, among the above-mentioned technical scheme, when needs increase dog-house area, carry sliding door to the second spacing position by the manual regulation of operation personnel.
Further, in the above technical solution, the method further includes: acquiring the opening and closing height of the lifting door at a first limit position and/or a second limit position; and calculating the air quantity F required by dust collection through the acquired opening and closing height data, and converting the air quantity F value into the corresponding output frequency of the variable frequency fan.
Further, in the above technical scheme, when the operator leaves the sensing area, the reaction time is delayed by 2 to 5 minutes; the operator returns within the delay time, and the variable frequency fan continues to operate; and if the operator does not return within the delay time, the variable frequency fan automatically stops.
Compared with the prior art, the invention has the following beneficial effects:
1) the infrared induction type automatic opening and closing feed opening can reduce manual operation and improve the working efficiency;
2) the height of the feed port can be controlled automatically through infrared induction and manually, and can be identified by a system, so that the requirements of site working conditions can be met to the maximum extent;
3) the feeding control device improves the dust collection efficiency, and the air exhaust volume of the dust removal system is adjusted in a variable air volume mode according to the opening and closing angle (or height) of the feeding door, so that the environment protection and energy saving are realized, and the dust control effect is ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means implementable in accordance with the contents of the description, and to make the above and other objects, technical features, and advantages of the present invention more comprehensible, one or more preferred embodiments are described below in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram showing the components and connection of units of the feeding control device of the present invention.
Fig. 2 is a system schematic of the material charge control device of the present invention.
FIG. 3 is a schematic diagram of the control circuit of the microcomputer chip in the system of the feeding control device of the present invention.
Description of the main reference numerals:
1-sealed feeding unit, 11-sealed room, 12-up-down type lifting door, 13-infrared detector, 130-induction window, 131-emission unit, 132-receiving unit, 14-first limit switch, 15-second limit switch, 16-blanking funnel and 17-reaction kettle pipeline;
2-dust collecting unit, 21-collecting cover, 22-first air volume adjusting valve;
3-a purification unit, 31-a dust remover, 32-a second air volume adjusting valve, 33-a variable frequency fan, 330-a driving circuit, 34-a purified air outlet and 340-an exhaust system;
100-a microcomputer chip, 101-an amplifier, 102-a first digital-to-analog converter, 103-a control identification unit, 104-a starting control unit, 105-a data acquisition unit, 106-a calculation unit, 107-a program controller, 120-a manual controller, 121-a numerical sensor and 122-a second analog-to-digital converter.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Spatially relative terms, such as "under", "below", "lower", "upper", "over", "upper", and the like, may be used herein for convenience in describing the relationship of one element or feature to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.
As used herein, the terms "first," "second," and the like are used to distinguish two different elements or regions, and are not intended to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.
Example 1
As shown in fig. 1, the charging control apparatus according to embodiment 1 of the present invention includes a sealed charging unit 1, a dust collection unit 2, and a purification unit 3. The whole of the sealed feeding unit 1 is a sealed space, namely a sealed room 11, the lower part of the sealed room 11 is connected with a reaction kettle pipeline 17, a feeding port with adjustable area and an induction device are arranged on the feeding end surface, the feeding port is provided with an up-down type lifting door 12, and the induction device can be an infrared detector 13. The dust collecting unit 2 is communicated with the sealed room 11 of the sealed feeding unit 1 through the opposite side surface of the feeding end surface (namely, the opposite side surface of the vertical sliding door 12) and is used for collecting the dissipated dust in the sealed room 11. The dust collecting unit 2 further comprises a collecting cover 21 and a first air volume adjusting valve 22, wherein the collecting cover can be designed into a square and round cover, the end face of one side of the square and round cover, which is communicated with the sealed room 11, is square, and the end face of the other side of the square and round cover, which is connected with the pipeline, is round. The first air volume adjusting valve 22 is disposed on the air duct between the collecting cover 21 and the purifying unit 3, and the first air volume adjusting valve 22 may be a single-vane adjusting valve, a multi-vane adjusting valve, a constant flow adjusting valve, or the like. The purification unit 3 comprises a dust remover 31, a second air volume adjusting valve 32 and a variable frequency fan 33, and the purification unit 3 receives the dust from the dust collecting unit, controls the operation of the variable frequency fan 33 according to the calculated air volume and finally completes dust removal and purification.
As further shown in fig. 1, the opening degree of the up-down type lifting door is controlled by the material feeding port through a limit switch. The limit switch comprises a first limit switch 14. The first limit switch 14 is used for automatically controlling the lifting door to move upwards to the position of the first limit switch to stop when the infrared detector 13 senses that an operator approaches the feeding port to prepare feeding.
As further shown in fig. 2, the microcomputer chip specifically includes a control identification unit 103, a start control unit 104, a data acquisition unit 105, and a calculation unit 106. The control recognition unit 103 is configured to control the transmission unit 131 of the infrared detector 13 to transmit infrared rays, and receive and recognize digital signals amplified by the amplifier 101 and converted by the first analog-to-digital converter 102 from the infrared detector receiving unit 132. The start control unit 104 receives the sensing signal and then automatically controls the sliding door 12 to move upward to the first limit switch position to stop. At this time, the data acquisition unit 105 acquires the opening and closing height of the lift gate 12 at the first limit switch position. The calculating unit 106 calculates the air quantity F required by the dust collecting unit according to the acquired opening and closing height data of the lifting door at the position of the first limit switch, and converts the air quantity F value into the corresponding output frequency of the variable frequency fan. The microcomputer chip further comprises a program controller 107 for driving the variable frequency fan 33 to operate through a driving circuit 330 according to the output frequency of the variable frequency fan 33 calculated by the calculating unit 106 so as to complete dust removal and purification. Specifically, under the conventional conditions, the control speed of the dust is ensured to be 0.5 +/-0.1 m/s within 25cm close to the feeding port, the microcomputer chip 100 determines the output air volume range and the fan frequency range of the variable frequency fan 33 through the opening area of the feeding port and through theoretical calculation of air discharge and experimental data correction, and the driving circuit 330 is switched on, so that the variable frequency fan 33 is started.
Further, the calculation formula of the air volume F is as follows: f ═ 0.75(10 x)2+ L × H) × 3600; wherein x is the distance from the lifting door 12 to the blanking central point; l is the opening and closing length of the sliding door 12; h is the opening and closing height of the lifting door. VControl ofIn order to control the air speed of the blanking point, 0.3-0.5 m/s is generally adopted (the dust control speed can be selected to be 0.5 +/-0.1 m/s), and under the actual working condition, the debugging is needed, so that the material loss rate is ensured to be less than 5%. The opening and closing length L of the lifting door 12 and the distance x from the lifting door 12 to the blanking central point are fixed values, and according to the formula, the air quantity F required by the dust collecting unit 2 is in direct proportion to the opening and closing height H of the lifting door 12. When the lifting door 12 is automatically started, the air output F value can be calculated according to the opening and closing height H of the lifting door, and the air output F value and the fan frequency have a corresponding curve relation according to a fan variable working condition operation characteristic curve chart provided by a variable frequency fan manufacturer. The microcomputer chip 100 obtains the corresponding frequency, controls the variable frequency fan 33 to determine the air volume required by the dust trapping unit 2, drives the variable frequency fan 33 through the driving circuit 330 to complete dust removal, and enters the exhaust system 340 from the clean air outlet 34. Preferably, but not limitatively, a second air volume adjusting valve 32 is arranged on the pipeline between the dust remover 31 and the variable frequency fan 33 in the purifying unit 3. The second air volume adjusting valve 32 may be a single-vane adjusting valve, a multi-vane adjusting valve, a constant flow adjusting valve, or the like.
Further, the dust collector 31 in the purifying unit 3 comprises a filter element, a compressed air blowing system, a pulse back-blowing controller, an electric control cabinet and the like.
Example 2
The feeding control device of embodiment 2 of the present invention also includes a sealed feeding unit 1, a dust trapping unit 2, and a purifying unit 3. As further shown in fig. 1, in embodiment 2, based on embodiment 1, the limit switch includes a second limit switch 15 in addition to the first limit switch 14. The first limit switch 14 is used for automatically controlling the lifting door to move upwards to the position of the first limit switch to stop when the infrared detector 13 senses that the operator approaches the feeding port to prepare for feeding. The second limit switch 15 is used for manually adjusting the lifting door by an operator to stop at the position of the second limit switch when the area of the feeding port needs to be increased.
In embodiment 2, in addition to the flow of controlling the opening of the sliding door, acquiring data, calculating, converting into the fan frequency according to the data of the air volume F, and driving the fan in embodiment 1, the data acquisition unit 105 can acquire the opening and closing height of the sliding door at the first limit switch position and/or the second limit switch position due to the addition of the second limit switch 15. As further shown in fig. 1, the manual controller 120 can control the opening and closing height of the vertical sliding door 12 through an electric or pneumatic device, a rack, etc., and manually adjust the vertical sliding door to the second limit switch position, and the digital information of the opening height is also transmitted to the microcomputer chip 100 through the numerical sensor 121 and the second analog-to-digital converter 122. That is, under the special working condition, or the height of the operator exceeds the predetermined range, the area of the feeding door needs to be increased, the operator can manually adjust the opening and closing height of the vertical sliding door 12, and the opening and closing height information is input to the microcomputer chip 100 after analog-to-digital conversion through the numerical sensor 121. As in embodiment 1, after the microcomputer chip 100 obtains the data, the frequency value of the required variable frequency fan 33 is output to the variable frequency fan by the calculation of the calculating unit 106, and the driving circuit 330 starts the exhaust system to remove dust.
Example 3
The feeding control method of embodiment 3 of the invention specifically comprises the following steps: firstly, after an infrared detector 13 senses an operator to be fed, a lifting door 12 of a feeding port is opened to a first limit position 14; preferably, but not limitatively, the lifting door 12 can be manually adjusted by the operator to the second limit position 15 when it is desired to increase the area of the dispensing opening. Then, whether the lift-up door 12 is opened to the first limit position 14 or the second limit position 15, the data obtaining unit 105 of the microcomputer chip 100 can obtain the opening and closing height of the lift-up door 12 at the first limit position 14 and/or the second limit position 15. The calculation unit 106 calculates the air volume F required for dust collection according to the acquired opening and closing height data, and converts the air volume F value into the output frequency of the corresponding variable frequency fan. And finally, the frequency conversion fan 33 in the purification unit 3 drives the escaping dust collected after feeding to be purified, and the purification unit controls the frequency conversion fan 33 to operate according to the calculated air volume to finish dust removal and purification.
Further, the calculation formula of the air volume F is as follows: f ═ 0.75(10 x)2+ L × H) 3600; wherein x is the distance from the lifting door to the blanking central point, and L is the opening and closing length of the lifting door (both the x and L values are fixed values); h is the opening and closing height of the lifting door.
As previously mentioned, the reaction time may be set to be delayed by 2 to 5 minutes when the operator who is feeding leaves the sensing area. When the operator returns within the delay time, the variable frequency fan continues to operate; and when the operator does not return within the delay time, the variable frequency fan automatically stops. The delay setting is as shown in fig. 3, after the infrared detector is triggered, a signal is transmitted to the microcomputer chip 100 through a line 1 (a solid line in fig. 3), the microcomputer chip 100 calculates the air quantity F through the acquired opening and closing height information of the vertical sliding door and transmits the air quantity F into the microcomputer chip B, the microcomputer chip B calculates the air quantity F and finally converts the calculated air quantity F into the corresponding fan frequency, the variable frequency fan 33 is controlled to determine the air quantity required by the dust collecting unit 2, and the dust collection is completed through the driving circuit 330. During the period, when the material bag is replaced, the operator leaves the infrared region temporarily, the infrared sensing region transmits an unresponsive signal to the microcomputer chip 100 through the line 2 (a dotted line in fig. 3), the reaction time of the microcomputer chip 100 is delayed for 2-5 min, and then if the operator returns, the infrared detector triggers and transmits a signal to the microcomputer chip 100 through the line 1 again to start a program; if the operator does not return, the feeding operation is finished, the microcomputer chip 100 cuts off the signal transmission, and the variable frequency fan 33 automatically stops.
The infrared induction type automatic opening and closing feed opening can reduce manual operation and improve the working efficiency; the height of the feeding door can be controlled by infrared induction and manual control, and can be identified by a system, so that the requirement of site working conditions is met to the maximum extent; the feeding control device improves the dust collecting efficiency, and the air exhaust volume of the dust removal system is adjusted in a variable air volume mode according to the opening and closing angle (or height) of the feeding door, so that the environment friendliness and energy conservation are realized, and the dust control effect is ensured.
The description of the specific exemplary embodiments of the present invention has been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.
Claims (15)
1. A material feeding control device is characterized by comprising:
the whole sealed feeding unit is a sealed space, the lower part of the sealed space is connected with a reaction kettle pipeline, and a feeding port with adjustable area and an induction device are arranged on the feeding end surface;
the dust collecting unit is communicated with the sealed feeding unit through the opposite side surface of the feeding end surface and is used for collecting dissipated dust;
the purification unit comprises a dust remover, a variable frequency fan and an air volume adjusting valve; and the purification unit receives the dust from the dust capture unit, controls the operation of the variable frequency fan according to the calculated air volume and completes dust removal and purification.
2. The dosage control device of claim 1, wherein the sensing device is an infrared detector.
3. The feeding control device of claim 2, wherein the feeding port controls the opening degree of the vertical pulling door through a limit switch.
4. A dosage control device as claimed in claim 3, wherein the limit switch comprises:
the first limit switch automatically controls the lifting door to move upwards to the position of the first limit switch to stop when the infrared detector senses that an operator approaches the feed inlet to prepare for feeding through a microcomputer chip;
and the second limit switch is used for manually adjusting the lifting door to a second limit switch position by the operator to stop when the area of the feeding port needs to be increased.
5. The feeding control device of claim 4, wherein the microcomputer chip comprises:
the control identification unit is used for controlling the transmitting unit of the infrared detector to transmit infrared rays, and receiving and identifying the amplified and analog-to-digital converted digital signals from the receiving unit of the infrared detector;
and the opening control unit is used for automatically controlling the lifting door to move upwards to the position of the first limit switch to stop.
6. The feeding control device according to claim 5, wherein the microcomputer chip further comprises:
a data acquisition unit for acquiring the opening and closing height of the sliding door at the first limit switch position and/or the second limit switch position;
and the calculating unit is used for calculating the air quantity F required by the dust collecting unit according to the acquired opening and closing height data and converting the air quantity F value into the corresponding output frequency of the variable frequency fan.
7. The charging control device according to claim 6, wherein the air volume F is calculated by the formula:
F＝0.75(10x2+L*H)*3600；
wherein x is the distance from the lifting door to the blanking central point; l is the opening and closing length of the lifting door; h is the opening and closing height of the lifting door.
8. The feeding control device of claim 6, wherein the microcomputer chip further comprises:
and the program controller is used for driving the variable frequency fan to operate through a driving circuit according to the output frequency of the variable frequency fan calculated by the calculating unit so as to finish dust removal and purification.
9. The charging control apparatus according to claim 1, wherein the dust capture unit comprises:
a collecting cover which is a square round cover with one side end face being square and the other side end face being round;
and the first air volume adjusting valve is arranged on the air pipe pipeline between the trapping cover and the purification unit.
10. The charging control device according to claim 1, wherein a second air volume adjusting valve is arranged on a pipeline between the dust remover and the variable frequency fan in the purification unit.
11. A feeding control method is characterized by comprising the following steps:
the lifting door of the feeding port is opened to a first limit position by sensing an operator to be fed;
the method comprises the following steps that the lost dust collected after feeding is subjected to purification treatment through the driving of a variable frequency fan in a purification unit, and the purification unit controls the operation of the variable frequency fan and completes dust removal and purification according to the calculated air quantity.
12. The method of claim 11, wherein the lift gate is manually adjusted by the operator to a second limit position when an increase in the throat area is desired.
13. The charge control method according to claim 12, further comprising:
acquiring the opening and closing height of the lifting door at the first limit position and/or the second limit position;
and calculating the air quantity F required by dust collection through the acquired opening and closing height data, and converting the air quantity F value into the corresponding output frequency of the variable frequency fan.
14. The charging control method according to claim 13, wherein the air volume F is calculated by the formula:
F＝0.75(10x2+L*H)*3600；
wherein x is the distance from the lifting door to the blanking central point; l is the opening and closing length of the lifting door; h is the opening and closing height of the lifting door.
15. The charge control method according to any one of claims 11 to 14, wherein a reaction time is delayed by 2 to 5 minutes when the operator leaves the sensing area;
when the operator returns within the delay time, the variable frequency fan continues to operate;
and when the operator does not return within the delay time, the variable frequency fan automatically stops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279103.8A CN114515548A (en) | 2020-11-16 | 2020-11-16 | Feeding control device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279103.8A CN114515548A (en) | 2020-11-16 | 2020-11-16 | Feeding control device and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115262325A (en) * | 2022-09-14 | 2022-11-01 | 河南省光大路桥工程有限公司 | Continuous plant mixing process for foamed asphalt mixture |
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