CN2389157Y

CN2389157Y - Asphaltum heating pot

Info

Publication number: CN2389157Y
Application number: CN 99242663
Authority: CN
Inventors: 郝林先
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-07
Filing date: 1999-09-07
Publication date: 2000-07-26
Anticipated expiration: 2009-09-07

Abstract

The utility model relates to an asphalt heating tank which aims to overcome the defects that a heat transfer oil asphalt heating tank needs to be matched with a boiler, the cost is high, and environments are polluted. The utility model comprises a tank body, an asphalt input port, and an asphalt output tube, wherein, an electric heater controlled by a control circuit is installed in the tank body. The utility model is mainly used for heating asphalt and doesn't need to be matched with a boiler. The utility model adopts electric heating and has the advantages of low cost, and no environment pollution.

Description

Asphaltum heating pot

Pitch is the main raw of road construction and maintenance, and before the construction, pitch that at first will temperature is lower injects the Asphaltum heating pot internal heating.Pitch in heating tank, be heated to temperature required after, be injected into again in the asphalt mixture machine and the stone uniform mixing, can be transported to the working-yard by the pitch of uniform mixing, stone mixture and use.The kind of Asphaltum heating pot is more, and these Asphaltum heating pots all need by special heating installation certain heat transfer fluid to be heated earlier, by the heat transfer fluid after being heated pitch are heated again.Advantages such as present widely used Asphaltum heating pot is the thermal oil Asphaltum heating pot, and this Asphaltum heating pot adopts thermal oil as heat transfer fluid, and it has the heat transfer fluid low toxicity, and when maximum operation (service) temperature, steam forces down, the pressure build-up rate is little.But there is following shortcoming in the thermal oil Asphaltum heating pot: one, thermal oil is as a kind of organism, with oxygen contacting in various degree arranged in processing, storage and use.At high temperature oxidized easily, and produce chain reaction, send a large amount of heat, self continue heating, oxidative condensation, the acidic substance of generation some amount.These acidic substance have corrodibility to equipment, reduce the work-ing life of equipment.In addition, the formation polymkeric substance that number molecular weight is big in the thermal oil, colloid increases, and makes the thermal oil retrogradation, has reduced heat transfer rate, the oil film thickening, film temperature rise, so that carbonization produce coking, carbon deposit and film throw out, have increased the maintenance cost of equipment; Two, this Asphaltum heating pot must with the supporting use of boiler, facility investment is big, the operation of boiler, safeguards cumbersomely, and waste energy, contaminate environment, higher to the bituminous heating cost; Three, this Asphaltum heating pot can only with the supporting use of fixed pitch amalgamator, can not with the supporting use of mobile bitumen amalgamator, use occasion is very limited.

The purpose of this utility model is, a kind of electrically heated Asphaltum heating pot is provided, and its facility investment is low, nontoxic, pollution-free, and operation, easy to maintenance can both supportingly be used with fixed and mobile bitumen amalgamator.

The purpose of this utility model is achieved in that Asphaltum heating pot, comprises tank body, pitch input aperture and pitch output tube, and its special character is that the electric heater by pilot circuit control is installed in the tank body.

Tank body is used to hold pitch, and pitch is heated in tank body.The pitch input aperture is used for the pitch that temperature is lower and injects in the tank body.The pitch output tube is used for extracting heated pitch out tank body, its general vertical placement.Electric heater is positioned at tank body, and it is converted into heat energy with electric energy, is used for the intravital pitch of jar is heated.Pilot circuit is used to control the master loop of electric heater, according to the concrete processing requirement temperature of bituminous in the tank body, and the switching on and off of power supply of control electric heater.

The lower end of pitch output tube of the present utility model is positioned at the top of electric heater.

The lower end of pitch output tube is positioned at the top of electric heater, can guarantee to reach temperature required pitch after the pitch that the pitch output tube is extracted out all is to be heated.

Pilot circuit of the present utility model comprises and is installed in a jar intravital temperature sensor, temperature regulator and executive circuit; The output terminal of temperature sensor is connected with the input terminus of temperature regulator, and the output terminal of temperature regulator is connected with the input terminus of executive circuit, and executive circuit is controlled switching on and off of electric heater main circuit power.

Temperature sensor changes temperature signal into electrical signal, and it is used to measure bituminous temperature in the tank body.Temperature regulator can be set required Heating temperature, and the observed temperature of constantly design temperature and temperature sensor being exported compares.If observed temperature is lower than design temperature, temperature regulator sends control signal, makes the electric heater main circuit power maintain on-state by executive circuit, and electric heater continues pitch is heated.If observed temperature is greater than or equal to design temperature, temperature regulator sends control signal, by executive circuit the electric heater main circuit power is disconnected, and electric heater stops pitch being heated.Executive circuit receives the control signal of temperature regulator, switches on or off the power supply of electric heater by its power element.

Executive circuit of the present utility model has contactor, and the normally opened contact of contactor is connected in the master loop of electric heater.

Contactor is as the power element of executive circuit, and it is used to switch on or off the power supply of electric heater.

Electric heater of the present utility model is installed in the position near the bottom of tank inner surface.

The bottom of the close tank inner surface of electric heater, but do not contact with the bottom.The pitch that is arranged in the above most of space of electric heater like this in the tank body can be heated by electric heater, and the small portion space that is positioned at below the electric heater is used to deposit bituminous sediment and dirt, is convenient to concentrate the discharge tank body.

The internal surface of tank body of the present utility model is a round shape, its closed at both ends; Electric heater adopts calrod, and its position is higher than the bottom of the internal surface of tank body, is lower than the axis of the internal surface of tank body.

Calrod is general parallel with the axis of tank inner surface.

Calrod of the present utility model comprises the tubular shell and is positioned at the electrothermal tube of shell, has nichrome wire in the electrothermal tube; The patching panel that the outer end of tank body is equipped with electrothermal tube is stretched out in the intravital end sealing of the insertion jar of shell.

Electrothermal tube does not contact with shell, interval air between them.Can make the shell of calrod outwards dispel the heat more even like this.Nichrome wire is as heating element, generally insulate by quartz sand between it and the electrothermal tube.Patching panel is used for fixing the two ends of nichrome wire, and it has terminal stud, and nichrome wire is connected with external wire.

Electrothermal tube of the present utility model is " U " shape, and its two ends are fixed on the patching panel.

" U " type electrothermal tube can make all wiring on same patching panel of two ends of nichrome wire, is convenient to the connection of lead.

Have three electrothermal tubes in the shell of calrod of the present utility model, three electrothermal tubes are uniform distribution in the enclosure.

The nichrome wire of three electrothermal tubes in the shell can be connected with three-phase alternating-current supply.

The nichrome wire of three electrothermal tubes in the shell of calrod of the present utility model adopts " Y " shape or " △ " shape connection, and they are connected with three-phase alternating-current supply; Executive circuit comprises intermediate relay and three-phase ac contactor, and an end of the coil of intermediate relay is connected with the output terminal of temperature regulator, and the other end is connected with the zero line of AC power; One end of the coil of three-phase ac contactor is connected with the zero line of AC power, and the other end of the coil of three-phase ac contactor is connected with an end of the normally opened contact of intermediate relay, and the other end of the normally opened contact of intermediate relay is connected with the live wire of AC power; Three normally opened contacts of three-phase ac contactor are connected on respectively in three live wires of three-phase alternating-current supply of nichrome wire of three electrothermal tubes; Temperature sensor adopts thermopair, and its output terminal is connected with the input terminus of temperature regulator.

Calrod can be one, also can be many.If calrod is many, executive circuit can be controlled many calrods respectively, can rate of heating as required select the calrod of different radicals to select different heating powers like this.

Calrod of the present utility model is installed in an end of tank body, and the pitch input aperture is near the other end of tank body, and thermopair is installed in a side of calrod.

Calrod inserts from an end of tank body, inserts a jar intravital part and generally only accounts for 2/3rds of tank inner surface axial length, and an end of insertion still has with a certain distance from the other end of tank inner surface.The pitch output tube is near an end of tank body installation calrod, and the pitch input aperture is near the other end of tank body.The part that calrod is installed in the tank body heats pitch like this, be heated to temperature required after, extract tank body out by the pitch output tube, the lower pitch of the temperature of the tank body the other end is gradually to replenishing near the end that calrod is installed, thereby is heated.By this structure, can be constantly in tank body, inject pitch to be heated, constantly extract in the tank body and be heated to temperature required pitch, realize continuous production.Thermopair is installed in a side of calrod, and general lower end near the pitch output tube can guarantee that like this by the pitch that the pitch output tube is extracted out be the pitch that reaches temperature required.

The utility model adopts electric heater that pitch is heated, and compares with the thermal oil Asphaltum heating pot to have the following advantages: as long as have power supply to use once, the utility model, do not need to increase boiler, facility investment is low; Two, the utility model is not owing to need to increase boiler, having under the condition of power supply and can using, can attach the generating set of providing for oneself in case of necessity, manufacture movably Asphaltum heating pot, like this can with the supporting use of mobile bitumen amalgamator, use range is wide; Three, the utility model can avoid thermal oil that equipment is produced corrosive nature owing to do not adopt heat-conducting oil heating, reduces the maintenance cost of equipment, prolongs the work-ing life of equipment; Four, because the utility model does not adopt boiler, and adopt electric heater directly to the pitch heating, pilot circuit is controlled electric heater automatically, and is simple to operate, and the thermo-efficiency height is saved the energy, and can avoid the pollution to environment of coal smoke, cinder.One cover, 800,000 kilocalorie thermal oil Asphaltum heating pots calculate by 4000 tons of pitches of annual heating, and bituminous heating cost per ton is 65.23 yuan.And adopt the utility model Asphaltum heating pot of 50 tons, and calculating by 4000 tons of pitches of annual heating, bituminous heating cost per ton has only 29.53 yuan; Five, the utility model is owing to adopt calrod as electric heater, certain space at interval between the shell of calrod and the electrothermal tube, and the shell that electric heating is held in both hands outwards heat radiation evenly can avoid partial pitch overheated, improves heating bituminous quality.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.

Fig. 1 is a front view of the present utility model.

Fig. 2 is the A-A view among Fig. 1.

Fig. 3 is the B-B view among Fig. 1.

Fig. 4 is the calrod 1 among Fig. 2 and the front view of calrod 2.

Fig. 5 is the calrod 1 among Fig. 2 and the vertical view of calrod 2.

Fig. 6 is the C-C view among Fig. 4

Fig. 7 is a circuit block diagram of the present utility model.

Fig. 8 is physical circuit figure of the present utility model.

To shown in Figure 8, present embodiment is a kind of electrically heated Asphaltum heating pot as Fig. 1, and it comprises tank body, pitch input aperture 3, pitch output tube 4, pitch refluxing opening 5, access hole 6 and the electric heater of being controlled by pilot circuit.Tank body comprises outside surface 7, thermal insulation layer 8 and internal surface 9, and internal surface 9 and outside surface 7 adopt the steel plate manufacturing, and they are round shape, closed at both ends, and two ends are cambered surface.The bottom of tank body left end has blow-off pipe 15.Electric heater is made up of calrod, and it is all parallel with the axis of tank inner surface to have 2, two calrods of calrod 1 and calrod in the tank body, and equates to the distance of the axis of tank inner surface; Thermopair is between two calrods.Calrod 1 and calrod 2 insert in the tank body from the right-hand member of tank body, and the part of insertion accounts for 2/3rds of tank body axial length.Calrod 1 and calrod 2 are higher than the bottom of tank inner surface 9, are lower than the axis of internal surface 9, and near the bottom.Pitch input aperture 3 is near the tank body left end.Pitch output tube 4 is near the right-hand member of tank body, and it is vertically placed, and its lower end is positioned at the top of calrod 1 and calrod 2.Calrod 1 and calrod 2 comprise tubular shell 10 and are positioned at the electrothermal tube 11 of shell 10.Have three electrothermal tubes 11 in the shell 10, electrothermal tube 11 is " U " shape, three electrothermal tubes 11 uniform distribution in shell 10.Have nichrome wire 12 in the electrothermal tube 11, insulate by quartz sand between nichrome wire 12 and the electrothermal tube.The patching panel 13 that electrothermal tube 11 is installed on the shell 10 of the outer end of tank body is stretched out in shell 10 sealing of the intravital end of insertion jar of calrod 1 and calrod 2.The two ends of electrothermal tube 11 are fixed on the patching panel 13, have terminal stud 14 on the patching panel 13, and the two ends of nichrome wire 12 are connected on the different terminal stud 14.Pilot circuit comprises and is installed in a jar intravital temperature sensor, temperature regulator XWT and executive circuit.Temperature sensor adopts thermopair T (thermopair is represented with T, represents with 16) in Fig. 2 and Fig. 3 in Fig. 8.Thermopair 16 and thermometer 17 are between calrod 1 and calrod 2.Thermometer 17 adopts WSS type thermometer, and temperature regulator XWT adopts XMTA type temperature regulator, and thermopair adopts E type thermopair.The nichrome wire of three electrothermal tubes of calrod 1 is respectively R1, R2 and R3, and the nichrome wire of three electrothermal tubes of calrod 2 is respectively R4, R5 and R6; Executive circuit comprises intermediate relay KA, three-phase ac contactor KM1, three-phase ac contactor KM2, button SB1 and button SB2; One end of the coil of intermediate relay KA is connected with the output terminal of temperature regulator, and the other end is connected with the zero line of AC power; One end of the coil of three-phase ac contactor KM1 and three-phase ac contactor KM2 all is connected with the zero line of AC power, and the other end is connected with the end of button SB1 and the end of button SB2 respectively; The other end of button SB1 and button SB2 all is connected with an end of the normally opened contact of intermediate relay KA, and the other end of the normally opened contact of intermediate relay KA is connected with the live wire of AC power; Three normally opened contact KM1-1, the KM1-2 of three-phase ac contactor KM1 and KM1-3 are connected on respectively in three live wires of three-phase alternating-current supply of nichrome wire R1, the R2 of three electrothermal tubes of calrod 1 and R3, and three normally opened contact KM2-1, the KM2-2 of three-phase ac contactor KM2 and KM2-3 are connected on respectively in three live wires of three-phase alternating-current supply of nichrome wire R4, the R5 of three electrothermal tubes of calrod 2 and R6.Nichrome wire R1, R2 and R3 adopt star-star-delta connection Y-Y-, and nichrome wire R4, R5 and R6 adopt star-star-delta connection Y-Y-.

During use, pitch to be heated is set temperature to be heated by temperature regulator XWT in the 3 injection tank bodies of pitch input aperture.The air switch KQ that closes, close button SA, SB1 and SB2, intermediate relay KA and all adhesives of three-phase ac contactor KM1, KM2, nichrome wire R1, R2, R3, R4, R5 and R6 begin heating.According to the size of required heating power, can select calrod 1 and calrod 2 one of them work or both's work by button SB1, SB2.Thermometer 17 is used for directly reading bituminous temperature in the tank body.Temperature regulator XWT compares the observed temperature value and the set temperature value of thermopair T output, and after the intravital pitch of jar was heated to design temperature, temperature regulator XWT exported control signal, and intermediate relay KA is discharged.After KA discharged, three-phase ac contactor KM1 and KM2 discharged, and nichrome wire R1, R2, R3, R4, R5 and R6 stop heating.Pitch after being heated is extracted out by pitch output tube 4.Sediment in the pitch and deposition of dirt are discharged by blow-off pipe 15 at last to the bottom of tank inner surface 9.

Claims

1, Asphaltum heating pot comprises tank body, pitch input aperture and pitch output tube, it is characterized in that, the electric heater by pilot circuit control is installed in the tank body.

2, Asphaltum heating pot according to claim 1 is characterized in that, the lower end of pitch output tube is positioned at the top of electric heater.

3, Asphaltum heating pot according to claim 2 is characterized in that, pilot circuit comprises and is installed in a jar intravital temperature sensor, temperature regulator and executive circuit; The output terminal of temperature sensor is connected with the input terminus of temperature regulator, and the output terminal of temperature regulator is connected with the input terminus of executive circuit, and executive circuit is controlled switching on and off of electric heater main circuit power.

4, Asphaltum heating pot according to claim 3 is characterized in that, executive circuit has contactor, and the normally opened contact of contactor is connected in the master loop of electric heater.

According to claim 1,2,3 or 4 described Asphaltum heating pots, it is characterized in that 5, electric heater is installed in the position near the bottom of tank inner surface.

6, Asphaltum heating pot according to claim 5 is characterized in that, the internal surface of tank body is a round shape, its closed at both ends; Electric heater adopts calrod, and its position is higher than the bottom of the internal surface of tank body, is lower than the axis of the internal surface of tank body.

7, Asphaltum heating pot according to claim 6 is characterized in that, calrod comprises the tubular shell and is positioned at the electrothermal tube of shell, has nichrome wire in the electrothermal tube; The patching panel that the outer end of tank body is equipped with electrothermal tube is stretched out in the intravital end sealing of the insertion jar of shell.

8, Asphaltum heating pot according to claim 7 is characterized in that, electrothermal tube is " U " shape, and its two ends are fixed on the patching panel.

9, Asphaltum heating pot according to claim 8 is characterized in that, has three electrothermal tubes in the shell of calrod, and three electrothermal tubes are uniform distribution in the enclosure.

10, Asphaltum heating pot according to claim 9 is characterized in that, the nichrome wire of three electrothermal tubes in the shell of calrod adopts " Y " shape or " △ " shape connection, and they are connected with three-phase alternating-current supply; Executive circuit comprises intermediate relay and three-phase ac contactor, and an end of the coil of intermediate relay is connected with the output terminal of temperature regulator, and the other end is connected with the zero line of AC power; One end of the coil of three-phase ac contactor is connected with the zero line of AC power, and the other end of the coil of three-phase ac contactor is connected with an end of the normally opened contact of intermediate relay, and the other end of the normally opened contact of intermediate relay is connected with the live wire of AC power; Three normally opened contacts of three-phase ac contactor are connected on respectively in three live wires of three-phase alternating-current supply of nichrome wire of three electrothermal tubes; Temperature sensor adopts thermopair, and its output terminal is connected with the input terminus of temperature regulator.

11, Asphaltum heating pot according to claim 10 is characterized in that, calrod is installed in an end of tank body, and the pitch input aperture is near the other end of tank body, and thermopair is installed in a side of calrod.

12, Asphaltum heating pot according to claim 11 is characterized in that, has calrod (1) and calrod (2) in the tank body, and two calrods are all parallel with the axis of tank inner surface, and equates to the distance of the axis of tank inner surface; Thermopair is between two calrods.

13, Asphaltum heating pot according to claim 12 is characterized in that, the nichrome wire of three electrothermal tubes of calrod (1) is respectively (R1), (R2) and (R3), and the nichrome wire of three electrothermal tubes of calrod (2) is respectively (R4), (R5) and (R6); Executive circuit comprises intermediate relay (KA), three-phase ac contactor (KM1), three-phase ac contactor (KM2), button (SB1) and button (SB2); One end of the coil of intermediate relay (KA) is connected with the output terminal of temperature regulator, and the other end is connected with the zero line of AC power; One end of the three-phase ac contactor (KM1) and the coil of three-phase ac contactor (KM2) all is connected with the zero line of AC power, and the other end is connected with an end of button (SB1) and an end of button (SB2) respectively; The other end of button (SB1) and button (SB2) all is connected with an end of the normally opened contact of intermediate relay (KA), and the other end of the normally opened contact of intermediate relay (KA) is connected with the live wire of AC power; Three normally opened contacts (KM1-1) of three-phase ac contactor (KM1), (KM1-2) and (KM1-3) be connected on respectively in three live wires of nichrome wire (R1), (R2) and three-phase alternating-current supply (R3) of three electrothermal tubes of calrod (1), three normally opened contacts (KM2-1) of three-phase ac contactor (KM2), (KM2-2) and (KM2-3) be connected on respectively in three live wires of nichrome wire (R4), (R5) and three-phase alternating-current supply (R6) of three electrothermal tubes of calrod (2).