CN113477114A - Asphalt mixing station control system - Google Patents
Asphalt mixing station control system Download PDFInfo
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- CN113477114A CN113477114A CN202110795376.6A CN202110795376A CN113477114A CN 113477114 A CN113477114 A CN 113477114A CN 202110795376 A CN202110795376 A CN 202110795376A CN 113477114 A CN113477114 A CN 113477114A
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Abstract
The invention relates to the technical field of engineering machinery, and provides a control system of an asphalt mixing station, which comprises a feeding system, a heating system, a screening and metering system and a mixing system which are sequentially arranged, wherein the mixing system is also communicated with an asphalt heating tank, the feeding system comprises a conveying belt, the conveying belt is driven by a feeding motor, one side of the conveying belt is provided with a feeding upper limit switch and a feeding lower limit switch, the feeding upper limit switch is positioned on the upper side of the feeding lower limit switch, the control system also comprises a time base chip U6, the THRS end of the time base chip U6 is connected with the feeding upper limit switch, the TRIG end of the time base chip U6 is connected with the feeding lower limit switch, the output end of the time base chip U6 is connected with one end of a relay K1 coil, the other end of the relay K1 coil is connected with a power supply VDD, and a normally closed contact of the relay K1 is connected into a power supply circuit of the feeding motor. Through above-mentioned technical scheme, the problem that pitch mixing station degree of automation is low among the prior art has been solved.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a control system of an asphalt mixing station.
Background
The mineral powder and the asphalt form asphalt mucilage together, so that the strength and the stability of the asphalt concrete are improved, and the asphalt concrete plays an important role in road construction. Asphalt mixing station, it refers to a complete equipment for batch production of asphalt concrete, the asphalt mixing equipment mainly consists of proportioning system, drying system, combustion system, hot material lifting, vibrating screen, hot material storage bin, weighing and mixing system, asphalt supply system, powder supply system, dust removal system, finished product bin and control system. The asphalt mixing station realizes the automatic mixing of asphalt concrete, not only saves manpower, but also reduces environmental pollution. At present, an asphalt mixing station still adopts manual control in the feeding process, and the automation degree is low.
Disclosure of Invention
The invention provides a control system of an asphalt mixing station, which solves the problem of low automation degree of the asphalt mixing station in the prior art.
The technical scheme of the invention is as follows: comprises a feeding system, a heating system, a screening and metering system and a mixing system which are arranged in sequence, the mixing system is also communicated with an asphalt heating tank,
the feeding system comprises a conveyer belt, the conveyer belt is driven by a feeding motor, one side of the conveyer belt is provided with a feeding upper limit switch and a feeding lower limit switch, the feeding upper limit switch is positioned at the upper side of the feeding lower limit switch,
the feeding device is characterized by further comprising a time base chip U6, the THRS end of the time base chip U6 is connected with the feeding upper limit switch, the TRIG end of the time base chip U6 is connected with the feeding lower limit switch, the output end of the time base chip U6 is connected with one end of a relay K1 coil, the other end of the relay K1 coil is connected with a power supply VDD, and a normally closed contact of the relay K1 is connected into a power supply circuit of the feeding motor.
Further, the heating system comprises a combustion chamber, the combustion chamber is connected with a fuel pipe and an air outlet of the blower, a pipeline of the fuel pipe is provided with a flow regulating valve, a control end of the flow regulating valve is connected with a controller,
also comprises a temperature detection unit, a pressure detection unit and an air door adjusting unit which are all connected with the controller,
the temperature detection unit is used for detecting the temperature in the combustion chamber, the pressure detection unit is used for detecting the pressure of the air outlet of the air blower, and the air door adjusting unit is used for adjusting the air quantity of the air inlet of the air blower;
an air door is arranged at an air inlet of the air blower, an angle sensor is arranged on the air door, the output end of the angle sensor is connected with a frequency converter, and the frequency converter is connected with a blast motor.
Further, the damper adjusting unit comprises a transistor Q1, a transistor Q6, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4 and a MOS transistor Q5,
the base electrode of the triode Q1 is connected with an IO0 interface of the controller, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the grid electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is connected with a power supply VDD, the drain electrode of the MOS tube Q2 is connected with the drain electrode of the MOS tube Q3, the source electrode of the MOS tube Q3 is grounded, the base electrode of the MOS tube Q2 is connected with the IO1 interface of the controller,
the base electrode of the triode Q6 is connected with an IO1 interface of the controller, the emitter electrode of the triode Q6 is grounded, the collector electrode of the triode Q6 is connected with the grid electrode of the MOS tube Q4, the source electrode of the MOS tube Q4 is connected with a power supply VDD, the drain electrode of the MOS tube Q4 is connected with the drain electrode of the MOS tube Q5, the source electrode of the MOS tube Q5 is grounded, the base electrode of the MOS tube Q5 is connected with the IO0 interface of the controller,
the drain electrode of MOS pipe Q3 is used for being connected with the first supply end of first motor, the drain electrode of MOS pipe Q5 is used for being connected with the second supply end of first motor, and first motor is used for driving the air door and rotates.
Further, the device also comprises a first position detection unit and a second position detection unit,
the first position detection unit comprises a Hall switch U1, the Hall switch U1 is arranged at a first position of an air inlet of the air blower, the second position detection unit comprises a Hall switch U2, the Hall switch U2 is arranged at a second position of the air inlet of the air blower, a first motor drives the air door to rotate between the first position and the second position, the output end of the Hall switch U1 is connected to the base electrode of the triode Q1, the output end of the Hall switch U2 is connected to the base electrode of the triode Q6,
still include the magnet steel, the magnet steel sets up on the air door.
Further, a second motor connected with the valve body is arranged in the flow regulating valve, the controller is connected with the second motor through a second motor driving unit,
the second motor drive unit comprises a drive chip U3 and a drive chip U4, the IN end of the drive chip U3 is connected with the PWM1 end of the controller, the OUT end of the drive chip U3 is used for being connected with the first power supply end of the second motor, the IN end of the drive chip U4 is connected with the PWM2 end of the controller, and the OUT end of the drive chip U4 is used for being connected with the second power supply end of the second motor.
Further, a resistor R16 IS connected between the IS terminal of the driving chip U3 and the ground, and a resistor R24 IS connected between the IS terminal of the driving chip U4 and the ground.
Further, the asphalt heating tank includes:
a tank body;
the electrothermal tubes are arranged in the radial direction respectively, one ends of the electrothermal tubes are located in the tank body, the other ends of the electrothermal tubes extend out of the tank body, and one ends of the electrothermal tubes located outside the tank body are connected with the side wall of the tank body.
Further, still include:
and the heat conduction coil is spirally arranged in the tank body and is used for being communicated with the hot oil furnace.
Further, still include:
the support frame sets up the jar is internal for support the heat conduction coil pipe, the support frame is a plurality of, and is a plurality of the support frame is followed the circumference evenly distributed of the jar body.
Further, a plurality of sleeves are arranged on the outer wall of the tank body along the circumferential direction, threads are arranged on the inner wall of each sleeve, and one end of each electric heating tube extends out of the tank body and is connected with the corresponding sleeve through the threads.
The working principle and the beneficial effects of the invention are as follows:
according to the invention, the feeding system feeds cold aggregates (cement, stones, sand and the like) into the heating system, the cold aggregates are heated into hot aggregates, the hot aggregates are accurately proportioned by the screening and metering system and then fed into the mixing system, and simultaneously, the asphalt heated in the asphalt heating tank is fed into the mixing system for automatic mixing of materials.
The feeding upper limit switch and the feeding lower limit switch are arranged on one side of the conveying belt and used for detecting the amount of materials on the conveying belt in real time, when the materials are excessive and the material accumulation height exceeds the position of the feeding upper limit switch, the feeding upper limit switch and the feeding lower limit switch can detect the materials, the feeding upper limit switch outputs a high level signal to the THRS end of the time base chip U6, the feeding lower limit switch outputs a high level signal to the TRIG end of the time base chip U6, the OUT end of the time base chip U6 outputs a low level signal, a coil of the relay K1 is electrified, a normally closed contact of the relay K1 is disconnected, and a feeding motor is powered off and stops feeding; the feeding upper limit switch and the feeding lower limit switch cannot detect the materials when the material stacking height is at the feeding lower limit switch position, the feeding upper limit switch outputs a low level signal to the THRS end of the time base chip U6, the feeding lower limit switch outputs a low level signal to the TRIG end of the time base chip U6, the OUT end of the time base chip U6 outputs a high level signal, the coil of the relay K1 is powered off, the normally closed contact of the relay K1 is closed, and the feeding motor is powered on to continue feeding.
According to the invention, the materials are automatically fed according to the amount of the materials on the conveying belt, and the work of a feeding motor is not required to be controlled manually.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic circuit diagram of a feed system of the present invention;
FIG. 2 is a schematic block diagram of the heating system circuit of the present invention;
FIG. 3 is a schematic circuit diagram of a damper adjustment unit according to the present invention;
FIG. 4 is a schematic circuit diagram of a first position detecting unit according to the present invention;
FIG. 5 is a schematic circuit diagram of a second position detecting unit according to the present invention;
FIG. 6 is a schematic view of the damper structure of the present invention;
FIG. 7 is a schematic circuit diagram of a second motor drive unit according to the present invention;
FIG. 8 is a schematic view of the construction of an asphalt heating tank of the present invention;
FIG. 9 is a schematic view of the supporting frame of the present invention;
FIG. 10 is a schematic view of an electric heating tube mounting structure according to the present invention;
FIG. 11 is a schematic view of the overall structure of the liquid level switch of the present invention;
FIG. 12 is a schematic view of the internal structure of the liquid level switch of the present invention (without the diaphragm);
FIG. 13 is a schematic view of the operating principle of the liquid level switch according to the present invention;
FIG. 14 is a schematic view of a diaphragm structure according to the present invention;
in the figure: 1 air door regulating unit, 2 first position detecting unit, 3 second position detecting unit, 4 air door regulating unit, 5 hall switch U2, 6 magnet steel, 7 second motor drive unit, 8 air doors, 9 liquid level switch, 91 casing, 911 lower casing, 9111 first through-hole, 9112 first recess, 912 upper casing, 9121 second through-hole, 9122 third through-hole, 92 trachea, 93 diaphragm, 931 sealing membrane, 932 driving piece, 9321 bellying, 94 micro-gap switch, 941 actuating lever, 95 lid, 96 jar, 10 jar body, 11 electrothermal tube, 12 heat conduction coil pipe, 13 support frame, 131 bracing piece, 132U type piece, 133 fastener, 134 fixed block, 135 screw rod, 14 sleeve, 15 trough, 16 radar level gauge, 17 thermometer, 18 feeding system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
As shown in fig. 1-14, the asphalt mixing station control system of this embodiment includes a feeding system 18, a heating system, a screening and metering system, and a mixing system, which are sequentially arranged, the mixing system is further communicated with an asphalt heating tank,
the feeding system 18 comprises a conveyer belt which is driven by a feeding motor, a feeding upper limit switch and a feeding lower limit switch are arranged on one side of the conveyer belt, the feeding upper limit switch is positioned on the upper side of the feeding lower limit switch,
as shown in fig. 1, the feeding device further comprises a time base chip U6, the THRS end of the time base chip U6 is connected with the feeding upper limit switch, the TRIG end of the time base chip U6 is connected with the feeding lower limit switch, the output end of the time base chip U6 is connected with one end of the coil of the relay K1, the other end of the coil of the relay K1 is connected with the power supply VDD, and the normally closed contact of the relay K1 is connected into the power supply circuit of the feeding motor.
The feeding upper limit switch and the feeding lower limit switch are arranged on one side of the conveying belt and used for detecting the amount of materials on the conveying belt in real time, when the materials are excessive and the material accumulation height exceeds the position of the feeding upper limit switch, the feeding upper limit switch and the feeding lower limit switch can detect the materials, the feeding upper limit switch outputs a high level signal to the THRS end of the time base chip U6, the feeding lower limit switch outputs a high level signal to the TRIG end of the time base chip U6, the OUT end of the time base chip U6 outputs a low level signal, a coil of the relay K1 is electrified, a normally closed contact of the relay K1 is disconnected, and a feeding motor is powered off and stops feeding; the feeding upper limit switch and the feeding lower limit switch cannot detect the materials when the material stacking height is at the feeding lower limit switch position, the feeding upper limit switch outputs a low level signal to the THRS end of the time base chip U6, the feeding lower limit switch outputs a low level signal to the TRIG end of the time base chip U6, the OUT end of the time base chip U6 outputs a high level signal, the coil of the relay K1 is powered off, the normally closed contact of the relay K1 is closed, and the feeding motor is powered on to continue feeding.
According to the embodiment, the material is automatically fed according to the amount of the materials on the conveying belt, and the work of a feeding motor is not required to be controlled manually.
Further, as shown in fig. 2, the heating system includes a combustion chamber, the combustion chamber is connected with both a fuel pipe and an air outlet of the blower, a flow regulating valve is disposed on a pipe of the fuel pipe, a control end of the flow regulating valve is connected with the controller,
also comprises a temperature detection unit, a pressure detection unit and an air door adjusting unit 1 which are all connected with the controller,
the temperature detection unit is used for detecting the temperature in the combustion chamber, the pressure detection unit is used for detecting the pressure of the air outlet of the air blower, and the air door adjusting unit is used for adjusting the air quantity of the air inlet of the air blower;
an air door is arranged at an air inlet of the air blower, an angle sensor is arranged on the air door, the output end of the angle sensor is connected with a frequency converter, and the frequency converter is connected with a blower motor.
In the embodiment, the temperature detection unit is used for detecting the temperature in the combustion chamber and sending temperature data to the controller in real time, when the temperature is higher than a set value, the controller sends an instruction to the air door adjusting unit 1, and the air door adjusting unit 1 reduces the air volume of the air inlet through adjusting the angle of the air door; the angle sensor detects the angle of the air door in real time and sends the angle to the frequency converter in real time, and when the angle of the air door is reduced, the frequency converter controls the rotating speed of the blower motor to be reduced, so that the air volume of the air outlet is reduced; when the air volume of the air outlet is reduced, the pressure of the air outlet is reduced, the controller detects the information through the pressure detection unit, the opening degree of the flow regulating valve is controlled to be reduced, the fuel entering the combustion chamber is reduced, and finally the temperature in the combustion chamber is reduced; similarly, when the temperature of the combustion chamber is lower than a set value, the air door adjusting unit 1 increases the air volume of the air inlet by adjusting the angle of the air door, the angle of the air door is increased, and the frequency converter controls the rotating speed of the blower motor to be increased, so that the air volume of the air outlet is increased; when the air volume of the air outlet is increased, the pressure of the air outlet is increased, the controller detects the information through the pressure detection unit, the opening degree of the flow control valve is controlled to be increased, the fuel entering the combustion chamber is increased, and finally the temperature in the combustion chamber is increased.
The embodiment realizes synchronous regulation of the flow of the air blower and the flow of the fuel pipe, the air volume of the air blower and the flow of the fuel pipe are changed in proportion, and the stability of flame is not influenced while the temperature regulation is realized.
Further, as shown in fig. 3, the damper adjusting unit 1 includes a transistor Q1, a transistor Q6, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, and a MOS transistor Q5,
the base electrode of the triode Q1 is connected with the IO0 interface of the controller, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the grid electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is connected with the power supply VDD, the drain electrode of the MOS tube Q2 is connected with the drain electrode of the MOS tube Q3, the source electrode of the MOS tube Q3 is grounded, the base electrode of the MOS tube Q2 is connected with the IO1 interface of the controller,
the base electrode of the triode Q6 is connected with the IO1 interface of the controller, the emitter electrode of the triode Q6 is grounded, the collector electrode of the triode Q6 is connected with the grid electrode of the MOS tube Q4, the source electrode of the MOS tube Q4 is connected with the power supply VDD, the drain electrode of the MOS tube Q4 is connected with the drain electrode of the MOS tube Q5, the source electrode of the MOS tube Q5 is grounded, the base electrode of the MOS tube Q5 is connected with the IO0 interface of the controller,
the drain electrode of MOS pipe Q3 is used for being connected with the first supply end of first motor, and the drain electrode of MOS pipe Q5 is used for being connected with the second supply end of first motor, and first motor is used for driving the air door and rotates.
As shown in fig. 6, the air door of the blower in this embodiment is a circular air door, the air door adjusting unit 1 drives the first motor to rotate forward and backward, and the first motor drives the air door to rotate, so as to adjust the air volume at the air inlet of the blower. The specific working principle is as follows:
when the IO0 of the controller outputs high level and the IO1 outputs low level, the triode Q1 is connected, the triode Q6 is disconnected, the MOS tube Q2 is disconnected, the MOS tube Q3 is connected, the MOS tube Q4 is connected, the MOS tube Q5 is disconnected, the first power supply end M-of the first motor is grounded, the second power supply end M + of the first motor is connected with a power supply VDD, and the first motor rotates forwards; when the IO0 of the controller outputs a low level and the IO1 outputs a low level, the triode Q1 is turned off, the triode Q6 is turned off, the MOS tubes Q2 to Q5 are all turned off, and the first motor stops rotating; when the IO0 of the controller outputs low level and the IO1 outputs high level, the triode Q1 is turned off, the triode Q6 is turned on, the MOS transistor Q2 is turned on, the MOS transistor Q3 is turned off, the MOS transistor Q4 is turned off, the MOS transistor Q5 is turned on, the first power supply end M-of the first motor is connected with a power supply VDD, the second power supply end M + of the first motor is grounded, and the first motor reversely rotates.
Further, a first position detection unit 2 and a second position detection unit 3 are included,
as shown in fig. 4-6, the first position detecting unit 2 includes a damper adjusting unit (1), the damper adjusting unit (1) is disposed at a first position of an air inlet of the blower, the second position detecting unit 3 includes a hall switch U2, the hall switch U2 is disposed at a second position of the air inlet of the blower, the first motor drives the damper to rotate between the first position and the second position, an output end of the damper adjusting unit (1) is connected to a base of a transistor Q1, an output end of the hall switch U2 is connected to a base of a transistor Q6,
still include magnet steel 6, magnet steel 6 sets up on the air door.
When the air door is positioned at the angle shown in fig. 5, the air inlet amount is the largest, and when the air door rotates by 90 degrees, the air inlet amount is the smallest; the magnetic steel 6 is arranged on the air door, the air door adjusting unit (1) is arranged at the first position of the air inlet, when the IO0 of the controller outputs high level and the IO1 outputs low level, the first motor rotates forwards, when the first motor rotates forwards to the first position, the air door adjusting unit (1) detects a signal of the magnetic steel 6, the OUT end of the air door adjusting unit (1) outputs low level to the base electrode of the triode Q1, the triode Q1 and the triode Q2 are both low level, the first motor stops rotating, and the forward rotation is not continued; when the IO0 of the controller outputs a low level and the IO1 outputs a high level, the first motor rotates reversely, when the first motor rotates reversely to the second position, the Hall switch U2 detects a signal of the magnetic steel 6, the OUT end of the Hall switch U2 outputs a low level to the base electrode of the triode Q6, the triode Q1 and the triode Q2 are both low levels, and the first motor stops rotating and does not rotate continuously any more; through air door regulating unit (1), hall switch U2 and magnet steel 6's setting, set up the turned angle of first motor within 90 degrees, in this within range, the rotation angle of air door and the intake of income wind gap are linear proportional relation, and like this, through setting up angle sensor on the air door, angle sensor's output value and the intake of income wind gap are linear proportional relation, and the operational relation is simple, and the converter is according to angle sensor output value's size, can judge the size of income wind gap intake, and then carry out the regulation of blast motor rotational speed.
Further, a second motor connected with the valve body is arranged in the flow regulating valve, the controller is connected with the second motor through a second motor driving unit 77,
as shown IN fig. 7, the second motor driving unit 77 includes a driving chip U3 and a driving chip U4, an IN terminal of the driving chip U3 is connected to the PWM1 terminal of the controller, an OUT terminal of the driving chip U3 is used for being connected to the first power supply terminal of the second motor, an IN terminal of the driving chip U4 is connected to the PWM2 terminal of the controller, and an OUT terminal of the driving chip U4 is used for being connected to the second power supply terminal of the second motor.
The second motor driving circuit is arranged between the controller and the flow regulating valve, the controller controls the forward rotation, the overturning and the rotating speed of the second motor through the second motor driving circuit, and the forward rotation or the reverse rotation of the electric valve body of the second motor realizes the control of the opening degree of the flow regulating valve by the controller. The second motor drive circuit operates on the following principle: the specific models of the driving chip U3 and the driving chip U4 are BTS7690, a half bridge is arranged inside the BTS7690 chip, and the driving chip U3 and the driving chip U4 form a full bridge driving circuit together. A pin PMM1 of the controller is connected to an IN end of a driving chip U3, a pin PMM2 of the controller is connected to an IN end of the driving chip U4, PWM1 and PWM2 are complementary control signals, when an upper bridge arm of the driving chip U3 and a lower bridge arm of the driving chip U4 are connected, a lower bridge arm of the driving chip U3 and an upper bridge arm of the driving chip U4 are disconnected, and the second motor rotates forwards; otherwise, the second motor rotates reversely. The speed of the second motor may be adjusted by varying the duty cycle of the PWM 1.
Further, a resistor R16 IS connected between the IS terminal of the driving chip U3 and the ground, and a resistor R24 IS connected between the IS terminal of the driving chip U4 and the ground.
The IS end of the driving chip U3 IS a current detection end, the detection of the working current of the second motor IS carried OUT by connecting a resistor R16 between the IS end and the ground, and when the working current of the second motor exceeds a set value, the output of the OUT end of the driving chip U3 IS switched off, so that the second motor IS prevented from being damaged.
Further, as shown in fig. 8 to 13, the intelligent composite heating asphalt tank of the present embodiment includes:
a can body 10;
the electric heating tubes 11 are provided with a plurality of electric heating tubes 11, the plurality of electric heating tubes 11 are respectively arranged along the radial direction, one end of each electric heating tube 11 is positioned in the tank body 10, the other end of each electric heating tube extends out of the tank body 10, and the end positioned outside the tank body 10 is connected with the side wall of the tank body 10.
In this embodiment, a plurality of radially arranged heating pipes are disposed in the tank body 10, so as to uniformly heat the asphalt in the tank body 10. One end of the electric heating tube 11 is arranged on the tank body 10 to play a role of fixing the electric heating tube 11, and one end of the electric heating tube 11 extends out of the tank body 10 to realize the connection with an external power supply.
Compared with the heating of a traditional oil heating furnace, the heating of the electric heating tube 11 is more beneficial to environmental protection; moreover, each electric heating tube 11 works independently, and one electric heating tube 11 is damaged, so that the work of other electric heating tubes 11 is not influenced, and the risk of equipment halt is low.
Further, still include:
and the heat conduction coil 12 is spirally arranged in the tank body 10, and the heat conduction coil 12 is used for being communicated with the hot oil furnace.
The present embodiment retains the original heat conducting coil 12 in the prior art, and realizes the combined heating of the heat conducting coil 12 and the electric heating tube 11, so as to increase the heating speed. And only one heating mode can be adopted according to actual needs, for example, when the equipment is not produced at night, the electric price is the trough electricity price, and the electric heating pipe 11 is cheaper to heat and more environment-friendly. When a certain equipment is in fault, the other heating mode can be switched to in time, and the construction equipment is ensured not to stop.
Further, still include:
the support frames 13 are arranged in the tank body 10 and used for supporting the heat conducting coil pipe 12, the support frames 13 are multiple, and the plurality of support frames 13 are evenly distributed along the circumferential direction of the tank body 10.
Considering heat exchange coil's self weight, set up a plurality of support frames 13, support heat exchange coil, guarantee heat exchange efficiency.
The specific structure of the supporting frame 13 is shown in fig. 9, and includes:
the bottom of the supporting rod 131 is fixed in the tank body 1;
a U-shaped block 132 disposed at a side of the support rod 131;
a fastener 133, the first end of which is hinged on the U-shaped block 132, the second end of which is provided with threads, and the fastener 133 is hollow;
the fixed block 134, the fixed block 134 and the U-shaped block 132 are arranged on the same side of the support rod 131, and a threaded hole is formed in one side, away from the support frame 13, of the fixed block 134.
When installing the heat conducting coil 3, the second end of the fastener 133 is rotated, the second end of the fastener 133 is far away from the fixing block 134, and the heat conducting coil 3 is passed through the fastener 133; then, the fastener 133 is rotated, and the second end of the fastener 133 is inserted into the threaded hole, so that the heat conducting coil 3 is fixed, and the heat conducting coil 3 is prevented from falling due to self weight.
Further, still include:
the screw 135 and the first end of the fastening piece 133 are provided with through holes, the screw 135 penetrates through the through holes, and the two ends are fixed on the U-shaped block 132 through nuts.
The hinge joint of the fastener 133 on the support rod 131 is realized through the screw 135 and the nut, and the structure is simple and the operation is convenient.
Furthermore, a plurality of sleeves 14 are arranged on the outer wall of the tank 10 along the circumferential direction, threads are arranged on the inner wall of the sleeve 14, and one end of the electrothermal tube 11 extends out of the tank 10 and is connected with the sleeve 14 through the threads.
The sleeve 14 is arranged on the outer wall of the tank body 10, and the electric heating tube 11 is in threaded connection with the sleeve 14, so that the electric heating tube 11 is fixed in the tank body 10, and the electric heating tank is simple in structure and convenient to operate; when one electric heating tube 11 is damaged, the electric heating tube can be conveniently and timely taken down for maintenance without influencing the work of other electric heating tubes 11.
Further, still include:
and the wiring groove 15 is arranged on the outer wall of the tank body 10 and arranged along the bus direction of the tank body 10, the wiring groove 15 is used for arranging a lead, and the lead is connected with the electrothermal tube 11 through a throat hoop.
The wiring groove 15 is arranged to fix the wires on the outer wall of the tank body 10, so that the space is not occupied; the lead is fixed at one end of the electrothermal tube 11 outside the tank body 10 through the hose clamp, the operation is convenient, and the connection is reliable.
Further, still include:
and the radar liquid level meter 16 is arranged on the upper cover of the tank body 10, and the radar liquid level meter 16 is used for being connected with the control box.
Through set up radar level gauge 16 at the upper cover of jar body 10, can the liquid level of real-time supervision jar body 10 to send to the control box, the control box shows liquid level data on the display screen, the intuitional liquid level condition of understanding in the jar body 10 of the staff of being convenient for.
Further, still include:
and the thermometer 17 is arranged on the side wall of the tank body 10, one end of the thermometer is positioned in the tank body 10, and the other end of the thermometer is used for being connected with the control box.
The thermometer 17 is arranged on the side wall of the tank body 10, so that the temperature in the tank body 10 is monitored in real time and is sent to the control box, and when the temperature is too high, the control box timely reduces the power of the hot oil furnace or the electric heating tube 11, and the asphalt in the tank body 10 is prevented from being burnt.
Further, still include:
and the liquid level switch 9 is arranged on the upper cover of the tank body 10, and the liquid level switch 9 is used for being connected with the control box.
If the radar level gauge 16 is out of order, the liquid level condition in the jar body 10 will unable to be known to the control box, and this embodiment sets up level switch 9 through the lateral wall at the jar body 10, and when the liquid level in the jar body 10 reachd level switch 9 position, level switch 9 sent this information to the control box, and the leakage fluid dram was in time opened to the control box, avoided the interior pitch of jar body 10 to spill over.
Further, the liquid level switch 9 is an air type liquid level switch 9, including:
the bottom of the shell 91 is provided with a first through hole 9111;
an air tube 92 having an upper end communicating with the first through hole 9111 and a lower end opened;
a diaphragm 93 disposed in the housing 91 and located at the bottom of the housing 91 for sealing the first through hole 9111;
the micro switch 94 is disposed inside the housing 91, the micro switch 94 includes a driving rod 941 and an output end, the driving rod 941 of the micro switch 94 is located above the diaphragm 93, and the output end of the micro switch 94 is connected to the control box.
Liquid level switch 9 is air formula liquid level switch 9 in this embodiment, and when using, through set up mounting flange 96 on trachea 92, the installation of realization in relevant position, the vertical setting of trachea 92, when the liquid level reachs the lower extreme of trachea 92, the air in liquid extrusion trachea 92, and air promotion diaphragm 93 produces ascending deformation, and diaphragm 93 promotes micro-gap switch 94's actuating lever 941, and micro-gap switch 94 moves, output signal to control box.
The embodiment is stable and reliable, strong in consistency and simple in installation, and detection elements (including the membrane 93 and the microswitch 94) and the like are not in direct contact with liquid, so that the liquid level detection alarm is suitable for liquid level detection and alarm of various oil products or high-viscosity liquid.
Further, the inner wall of the first through hole 9111 is provided with threads, and the upper end of the air tube 92 is disposed in the first through hole 9111 through the threads.
Further, the upper end of the air tube 92 is provided with a blocking part,
the bottom of the shell 91 is provided with a first groove 9112, the first groove 9112 is communicated with the first through hole 9111, and the first groove 9112 is used for placing the blocking part.
The upper end of the air pipe 92 is arranged in the first through hole 9111 through threads, so that the operation is simple and convenient; the upper end of trachea 92 is provided with the fender portion, when being connected trachea 92 and casing 91, passes first through-hole 9111 with trachea 92's lower extreme, and the card of fender portion is established in first recess 9112, avoids because the screw thread is not hard up, causes trachea 92 and casing 91 to be connected not hard up to influence the sealed effect of diaphragm 93 to trachea 92 upper end.
Further, the housing 91 includes a lower housing 911 and an upper housing 912 which are connected to each other, the first through hole 9111 and the diaphragm 93 are both disposed at the bottom of the lower housing 911, and a gap is left between the bottom of the upper housing 912 and the diaphragm 93;
the diaphragm 93 includes a sealing film 931 and a transmission piece 932, the sealing film 931 is disposed at the bottom of the lower case 911, one surface of the transmission piece 932 is bonded to the sealing film 931, and the other surface is provided with a protrusion 9321;
the micro switch 94 is disposed in the upper case 912 and located at the bottom of the upper case 912, the bottom of the upper case 912 is provided with a second through hole 9121, and the protrusion 9321 is movably disposed in the second through hole 9121.
The diaphragm 93 includes two parts of a sealing film 931 and a driving plate 932, when the liquid level reaches the lower end of the air tube 92, the air in the air tube 92 presses the sealing film 931 to deform, the sealing film 931 pushes the driving plate 932 upwards, the convex portion 9321 of the driving plate 932 pushes the driving rod 941 of the microswitch 94, and the microswitch 94 is actuated. Under the same pressure, the area of the protrusion 9321 is small, the generated pressure is strong, and the reliable action of the microswitch 94 is ensured.
Further, a drive rod 941 of the micro switch 94 is disposed in the second through hole 9121.
The setting of micro-gap switch 94's actuating lever 941 is in second through-hole 9121, and second through-hole 9121 plays the guide effect, avoids bellying 9321 and actuating lever 941 to produce lateral displacement to guarantee the promotion effect of drive plate 932 to actuating lever 941.
Further, the side wall of the upper casing 912 is provided with a third through hole 9122, and the output end of the micro switch 94 is led out through the third through hole 9122.
The output end of the microswitch 94 is led out through the third through hole 9122, and is conveniently connected with an external controller.
Further, the sealing film 931 is made of hydrogenated nitrile rubber.
The sealing membrane 931 is made of hydrogenated nitrile rubber, is made of highly saturated rubber, is resistant to corrosion of various oils and gases such as freon, and is resistant to the temperature of 150 ℃.
Further, the device also comprises a cover body 95, and the cover body 95 is detachably arranged at the upper end of the upper shell 912.
A cover body 95 is arranged above the upper shell 912 to protect the microswitch 94; the upper cover and the upper shell 912 are detachably connected, so that the micro switch 94 can be conveniently overhauled and replaced.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Asphalt mixing station control system, its characterized in that: comprises a feeding system (18), a heating system, a screening and metering system and a mixing system which are arranged in sequence, the mixing system is also communicated with an asphalt heating tank,
the feeding system (18) comprises a conveyer belt, the conveyer belt is driven by a feeding motor, one side of the conveyer belt is provided with a feeding upper limit switch and a feeding lower limit switch, the feeding upper limit switch is positioned at the upper side of the feeding lower limit switch,
the feeding device is characterized by further comprising a time base chip U6, the THRS end of the time base chip U6 is connected with the feeding upper limit switch, the TRIG end of the time base chip U6 is connected with the feeding lower limit switch, the output end of the time base chip U6 is connected with one end of a relay K1 coil, the other end of the relay K1 coil is connected with a power supply VDD, and a normally closed contact of the relay K1 is connected into a power supply circuit of the feeding motor.
2. The asphalt mixing station control system of claim 1, characterized in that: the heating system comprises a combustion chamber, the combustion chamber is connected with a fuel pipe and an air outlet of the blower, a pipeline of the fuel pipe is provided with a flow regulating valve, a control end of the flow regulating valve is connected with a controller,
also comprises a temperature detection unit, a pressure detection unit and an air door adjusting unit (1) which are all connected with the controller,
the temperature detection unit is used for detecting the temperature in the combustion chamber, the pressure detection unit is used for detecting the pressure of the air outlet of the air blower, and the air door adjusting unit (1) is used for adjusting the air quantity of the air inlet of the air blower;
an air door (8) is arranged at an air inlet of the air blower, an angle sensor is arranged on the air door (8), the output end of the angle sensor is connected with a frequency converter, and the frequency converter is connected with a blast motor.
3. The asphalt mixing station control system of claim 2, characterized in that: the damper adjusting unit (1) comprises a triode Q1, a triode Q6, a MOS tube Q2, a MOS tube Q3, a MOS tube Q4 and a MOS tube Q5,
the base electrode of the triode Q1 is connected with an IO0 interface of the controller, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the grid electrode of the MOS tube Q2, the source electrode of the MOS tube Q2 is connected with a power supply VDD, the drain electrode of the MOS tube Q2 is connected with the drain electrode of the MOS tube Q3, the source electrode of the MOS tube Q3 is grounded, the base electrode of the MOS tube Q2 is connected with the IO1 interface of the controller,
the base electrode of the triode Q6 is connected with an IO1 interface of the controller, the emitter electrode of the triode Q6 is grounded, the collector electrode of the triode Q6 is connected with the grid electrode of the MOS tube Q4, the source electrode of the MOS tube Q4 is connected with a power supply VDD, the drain electrode of the MOS tube Q4 is connected with the drain electrode of the MOS tube Q5, the source electrode of the MOS tube Q5 is grounded, the base electrode of the MOS tube Q5 is connected with the IO0 interface of the controller,
the drain electrode of MOS pipe Q3 is used for being connected with the first supply end of first motor, the drain electrode of MOS pipe Q5 is used for being connected with the second supply end of first motor, and first motor is used for driving air door (8) to rotate.
4. The asphalt mixing station control system of claim 3 wherein: also comprises a first position detection unit (2) and a second position detection unit (3),
the first position detection unit (2) comprises a Hall switch U1, the Hall switch U1 is arranged at the first position of an air inlet of the air blower, the second position detection unit (3) comprises a Hall switch U2, the Hall switch U2 is arranged at the second position of the air inlet of the air blower, a first motor drives an air door (8) to rotate between the first position and the second position, the output end of the Hall switch U1 is connected to the base of the triode Q1, the output end of the Hall switch U2 is connected to the base of the triode Q6,
still include magnet steel (6), magnet steel (6) set up on air door (8).
5. The asphalt mixing station control system of claim 2, characterized in that: a second motor connected with the valve body is arranged in the flow regulating valve, the controller is connected with the second motor through a second motor driving unit (7),
the second motor driving unit (7) comprises a driving chip U3 and a driving chip U4, the IN end of the driving chip U3 is connected with the PWM1 end of the controller, the OUT end of the driving chip U3 is connected with the first power supply end of the second motor, the IN end of the driving chip U4 is connected with the PWM2 end of the controller, and the OUT end of the driving chip U4 is connected with the second power supply end of the second motor.
6. The asphalt mixing station control system of claim 5, characterized in that: a resistor R16 IS connected between the IS end of the driving chip U3 and the ground, and a resistor R24 IS connected between the IS end of the driving chip U4 and the ground.
7. The asphalt mixing station control system of claim 1, characterized in that: the asphalt heating tank comprises:
a tank (10);
the electric heating tubes (11), the electrothermal tube (11) are a plurality of, and a plurality of electrothermal tube (11) are respectively along radial setting, one end of electrothermal tube (11) is located in the jar body (10), and the other end stretches out jar body (10), and the one end that is located outside jar body (10) is connected with jar body (10) lateral wall.
8. The asphalt mixing station control system of claim 7, characterized in that: further comprising:
the heat conduction coil pipe (12) is spirally arranged in the tank body (10), and the heat conduction coil pipe (12) is communicated with the hot oil furnace.
9. The asphalt mixing station control system of claim 8, characterized in that: further comprising:
the support frame (13) sets up in the jar body (10), be used for supporting heat conduction coil pipe (12), support frame (13) are a plurality of, and are a plurality of support frame (13) are followed the circumference evenly distributed of the jar body (10).
10. The asphalt mixing station control system of claim 7, characterized in that: the outer wall of the tank body (10) is circumferentially provided with a plurality of sleeves (14), the inner wall of each sleeve (14) is provided with threads, and one end of each electric heating tube (11) extends out of the tank body (10) and is connected with the sleeves (14) through the threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795376.6A CN113477114A (en) | 2021-07-14 | 2021-07-14 | Asphalt mixing station control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110795376.6A CN113477114A (en) | 2021-07-14 | 2021-07-14 | Asphalt mixing station control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113477114A true CN113477114A (en) | 2021-10-08 |
Family
ID=77938690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110795376.6A Withdrawn CN113477114A (en) | 2021-07-14 | 2021-07-14 | Asphalt mixing station control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113477114A (en) |
-
2021
- 2021-07-14 CN CN202110795376.6A patent/CN113477114A/en not_active Withdrawn
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Application publication date: 20211008 |