CN219584954U - Insulation asphalt storage tank convenient to access - Google Patents

Abstract

The utility model relates to the technical field of asphalt storage equipment, in particular to a heat preservation asphalt storage tank convenient to store and fetch, which comprises a tank body, an asphalt heat homogenizing device and an annular heating device, wherein the asphalt heat homogenizing device and the annular heating device are arranged in the tank body, the annular heating device comprises an annular heating component, a heat energy providing component, a liquid outlet pipe and a return pipe, one end of the liquid outlet pipe is connected with the bottom end of the annular heating component, the other end of the liquid outlet pipe is connected with the heat energy providing component, one end of the return pipe is connected with the top end of the annular heating component, the other end of the return pipe is connected with the heat energy providing component, the annular heating component is arranged at the bottom in the tank, the top end of the asphalt heat homogenizing device is arranged at the top of the tank body, the bottom end of the asphalt heat homogenizing device penetrates through the annular heating component and is connected with the bottom in the tank body, and asphalt heated at the bottom in the tank body exchanges with unheated asphalt at the top of the tank body in a rotating mode to ensure that the temperature of the asphalt in the tank body is consistent.

Description

Insulation asphalt storage tank convenient to access

Technical Field

The utility model relates to the technical field of asphalt storage equipment, in particular to a heat preservation asphalt storage tank convenient to access.

Background

Asphalt is one of important materials for supporting national economy construction, is a byproduct of an oil refinery, is an organic cementing building material, and has high production flexibility and strong market adaptability. In civil engineering, asphalt is a waterproof material and an anticorrosive material widely applied, and is mainly applied to waterproofing of roofing, ground and underground structures and corrosion prevention of wood and steel; asphalt is also a pavement structure cementing material widely applied to road engineering, asphalt pavement with different structures can be built after the asphalt is matched with mineral materials with different compositions in proportion, asphalt for road engineering construction is generally stored in an asphalt storage tank provided with a heating device, dense and uniform heating pipelines are paved in the tank, and asphalt is heated and taken out from the tank when needed.

However, the problem that the heating time is long and the heating efficiency is low exists in the design, in order to solve the problem, the prior art adopts the asphalt tank to adopt the local heating technology, through arranging a small tank body in the large asphalt tank body, after the small tank body heats part of asphalt quickly, the small tank body is taken out, the asphalt in the large tank body flows into the small tank body to heat by self weight, so that the problem that the heating time is long and the heating efficiency is low is solved, however, the asphalt has poor fluidity at normal temperature, the time of flowing into the small tank by self weight is too long, so that the heat energy in the small tank is consumed, the material taking efficiency is influenced, and the problem that the asphalt in the large tank is convenient to take out only by arranging a heating pipeline to match with the high-temperature heating of the small tank body exists in the design that the fluidity of the asphalt in the large tank is maintained, and the whole asphalt tank needs to be heated only by taking out part of the asphalt is solved, and the heat energy waste and the loss are caused by repeated heating in the process.

In order to solve the technical problems, the technical proposal disclosed in the Chinese patent of patent number 202222324767.2 is that: the utility model provides a pitch storage jar of temperature zone accuse, through setting up partition device, partition device's diaphragm divide into normal atmospheric temperature district and zone of heating with the pitch jar body, be equipped with the pitch inner tank body in the zone of heating, the internal intensive distribution of pitch inner tank has first heating pipe, partition device's riser and diaphragm are connected perpendicularly, the riser encircles pitch inner tank body axle center and sets up a plurality of, the riser is provided with the second heating pipe, form the medium temperature zone of heating between the adjacent riser, the feed opening has been seted up to the diaphragm, the feed opening corresponds the medium temperature zone of heating setting, the oil pump sets up in the medium temperature zone of heating, the oil pump is with the pitch of medium temperature zone of heating take out in the pitch inner tank body, can heat the second heating pipe of medium temperature zone when extracting pitch and make pitch become the liquid that can extract, when need carry out pitch replenishment to pitch inner tank body in the pitch inner tank body, start the oil pump and take out the pitch in one of them medium temperature zone of heating fast and advance pitch inner tank body in the high temperature heating, speed and the duration of taking out pitch inner tank body through the partition setting up, waste and loss of heat energy have been reduced.

However, the following technical problems exist in the prior art: when the asphalt is used, only the asphalt in the heating area and the medium temperature heating area is heated, the asphalt in the low temperature area is heated only by the residual heat of the heating area and the medium temperature heating area, the heat energy is unevenly transferred, when the temperature of the asphalt stored in the low temperature area is lower, the asphalt in the low temperature area becomes sticky or even has a solidification phenomenon, and the asphalt is difficult to supplement to the medium temperature heating area by the dead weight of the asphalt, so that the taking speed of the asphalt is influenced.

Disclosure of Invention

In view of the above, it is desirable to provide a storage tank for insulating asphalt that is easy to access and has uniform temperature transfer.

The utility model provides a heat preservation pitch storage tank convenient to access, includes jar body, pitch heat homogenization device, annular heating device set up in jar body inside, annular heating device includes annular heating component, heat energy supply subassembly, drain pipe and back flow, the conduction oil is equipped with in the annular heating device for transfer heat energy, the one end of drain pipe is connected with annular heating component's bottom, and the other end and the heat energy supply subassembly of drain pipe are connected to in sending the conduction oil after heating to annular heating component, the one end and the top of back flow are connected with heat energy supply subassembly, and the other end and the heat energy of back flow are connected in order to send the conduction oil that gives off heat energy to the heat energy supply subassembly in the reheat, continuously provide heat energy in the annular heating component through cyclic heating conduction oil, annular heating component installs in jar inner bottom, with the pitch of the internal storage of heating jar, pitch heat homogenization device's top is installed at jar body top, the bottom of drain pipe passes behind the annular heating component is connected with the heat energy supply subassembly to the bottom of jar body, the pitch heat homogenization device is with the internal bottom of pitch of jar, the internal liquid state of pitch heat homogenization device through rotatory mode with the internal pitch of the jar of giving off heat energy to the pitch, the internal pitch of the whole tank body of pitch is guaranteed to take the pitch, and the internal heat rate of pitch is the whole in the pitch tank.

Preferably, the asphalt heat homogenizing device comprises a driving motor, a rotating shaft body, a stirring assembly, a spiral lifting assembly and a guide cover, wherein the guide cover is arranged in the tank body so as to divide the tank body into an upper heat-preserving zone and a lower heating zone, the driving motor is arranged at the top end of the tank body, the bottom end of the rotating shaft body is arranged at the bottom end of the tank body, the top end of the rotating shaft body is arranged in the driving motor so that the driving motor drives the rotating shaft body to do rotary motion in the tank body, the spiral lifting assembly is arranged on the rotating shaft body in the lower heating zone so as to transport heated asphalt in the lower heating zone to the upper heat-preserving zone along with the rotation of the rotating shaft body, the stirring assembly is arranged on the rotating shaft body in the upper heat-preserving zone so as to fully mix the heated asphalt with unheated asphalt along the guide cover, the mixed asphalt flows from the upper heat-preserving zone to the lower heating zone, the heated asphalt in the lower heating zone is transported to the upper heat-preserving zone and then flows back to the lower heating zone, so that the heat energy is uniformly transferred in the heating zone, and the whole asphalt is accelerated.

Preferably, the tank body is provided with a feed inlet and a discharge outlet, and the feed inlet and the discharge outlet are both arranged at the bottom of the tank body.

Preferably, the insulation asphalt storage tank convenient to access still includes pitch heating storage device, pitch heating storage device installs on the pan feeding mouth, pitch heating storage device includes pitch storage tube, pitch storage pump and heating pitch groove, the one end and the feed inlet of pitch storage tube are connected, the other end and the pitch heating groove internal connection of pitch storage tube, pitch storage pump installs on the pitch storage tube to with pitch in the pitch heating groove pump through the pan feeding mouth to the jar internal, the outside in heating pitch groove is around the drain pipe that has serpentine annular heating device, with the inside heat energy that provides of heating pitch groove and heating inslot pitch, makes the pitch in the heating pitch groove maintain the liquid state for pitch storage rate.

Preferably, the insulation asphalt storage tank convenient to access still includes the pitch and takes the device, the pitch is taken the device and is installed on the discharge gate, the pitch is taken the device and is taken the pipe, pitch and take the pump including pitch, pitch is taken the one end of pipe and is connected with the discharge gate, pitch is taken the pump and is installed on pitch is taken the pipe to take the pipe through pitch and pump up pitch to external from the jar internal.

Preferably, the annular heating assembly comprises a first heating element, a second heating element and a third heating element, wherein the first heating element and the second heating element are annular metal pipes, the first heating element is arranged at the bottom of the heating area at the lower part, the first heating element is connected with a liquid outlet of the liquid outlet pipe so that heat conduction oil flows into the first heating element pipe body from the liquid outlet pipe, the third heating element is a plurality of vertical metal pipes arranged between the first heating element and the second heating element, the third heating element is communicated with the inside of the first heating element and the inside of the second heating element so that the heat conduction oil flows into the second heating element pipe body from the first heating element pipe body, the second heating element is arranged between the first heating element and the guide cover, and the second heating element is connected with a liquid inlet of the return pipe so that the heat conduction oil flows into the return pipe from the second heating element pipe body.

Preferably, the air guide sleeve is a downwards inclined truncated cone-shaped metal shell so as to accelerate the flow rate of asphalt from the upper heat preservation area to the lower heating area, the diameter of the air guide sleeve is matched with the tank body, and the air guide sleeve is welded in the tank body.

Preferably, the annular heating assembly, the liquid outlet pipe and the return pipe are all made of metal materials, so that the heat conduction efficiency of the annular heating device can be improved.

Preferably, two heat-insulating layers are arranged on the tank body, so that the heat-insulating capability of the tank body is improved.

In the above-mentioned insulation asphalt storage tank convenient to access, pitch heat homogenization device, annular heating device set up in the jar body inside, annular heating device includes annular heating element, heat energy supply subassembly, drain pipe and back flow, the built-in conduction oil of annular heating device, the one end and the bottom of annular heating element of drain pipe are connected, and the other end and the heat energy supply subassembly of drain pipe are connected to in sending the conduction oil after heating to annular heating element, the one end and the top of annular heating element of back flow are connected, and the other end and the heat energy supply subassembly of back flow are connected, in order to send the conduction oil that gives off heat energy to the heat energy and heat the subassembly and reheat, the conduction oil through circulation heating constantly provides heat energy in the annular heating element, annular heating element installs in the bottom in the jar, in order to heat the pitch of storing in the jar body, pitch heat homogenization device's top is installed at jar body top, pitch heat homogenization device's bottom passes behind the annular heating element with jar bottom is connected, pitch heat homogenization device is heated with jar body top and the heat exchange of the whole pitch that does not guarantee through rotatory mode to take pitch to make the internal temperature of pitch change the whole pitch into the rate of taking the jar.

Drawings

FIG. 1 is an external block diagram of a storage tank for warm asphalt of the present utility model for easy access.

FIG. 2 is an internal block diagram of a storage tank for warm asphalt for easy access according to the present utility model.

Fig. 3 is a block diagram of an annular heating assembly of the present utility model.

In the figure: the convenient-to-access insulating asphalt storage tank 10, tank body 20, upper insulating region 21, lower heating region 22, feed inlet 23, discharge outlet 24, asphalt heat homogenizing device 30, driving motor 31, rotating shaft body 32, stirring assembly 33, spiral lifting assembly 34, air guide cover 35, annular heating device 40, annular heating assembly 41, first heating element 411, second heating element 412, third heating element 413, heat energy providing assembly 42, liquid outlet pipe 43, return pipe 44, asphalt heating storage device 50, asphalt storage pipe 51, asphalt storage pump 52, heated asphalt tank 53, asphalt taking device 60, asphalt taking pipe 61, and asphalt taking pump 62.

Detailed Description

The technical scheme and technical effects of the embodiments of the present utility model are further described in detail below with reference to the accompanying drawings.

The utility model provides a heat preservation pitch storage tank 10 convenient to access, includes jar body 20, pitch heat homogenization device 30, annular heating device 40 set up inside jar body 20, annular heating device 40 includes annular heating component 41, heat energy supply component 42, drain pipe 43 and back flow 44, annular heating device 40 installs conduction oil in jar interior bottom for the heat energy transfer, the one end of drain pipe 43 is connected with annular heating component 41's bottom, and the other end of drain pipe 43 is connected with heat energy supply component 42 to send the conduction oil after heating back in annular heating component 41, return the one end of back flow 44 is connected with annular heating component 41's top, and the other end and heat energy supply component 42 are connected, so as to send the conduction oil that gives off heat energy to heat energy in the heat energy supply component 42 again, constantly provide heat energy to annular heating component 41 through cyclic heating conduction oil, annular heating component 41 installs in jar interior bottom to heat the pitch of storing in jar body 20, pitch heat homogenization device 30's top is installed at jar body 20 top, the bottom that the heat energy transfer device is passed through annular heating component 30 the bottom in order to make pitch body heat energy transfer the pitch body heat energy transfer rate in order to make the pitch body heat homogenization device 20 the pitch body and the bottom is the heat of the pitch body and the pitch body is the heat of the heat energy transfer tank body is the heat-transfer device is the bottom in the interior of the pitch body 20 to make the pitch body and the pitch body is the heat to be the whole and the pitch body is the heat to be the heat.

The asphalt heat homogenizing apparatus 30 comprises a driving motor 31, a rotating shaft body 32, a stirring assembly 33, a spiral lifting assembly 34 and a guide cover 35, wherein the guide cover 35 is installed in the tank body 20 to divide the interior of the tank body 20 into an upper heat preservation zone 21 and a lower heating zone 22, for example, the guide cover 35 can be welded in the tank body 20 to realize fixation, the driving motor 31 is installed at the top end of the tank body 20, the bottom end of the rotating shaft body 32 is installed at the bottom end of the tank body 20, the top end of the rotating shaft body 32 is installed in the driving motor 31 so that the driving motor 31 drives the rotating shaft body 32 to make rotary motion in the tank body 20, the spiral lifting assembly 34 is installed on the rotating shaft body 32 in the lower heating zone 22 to transport heated asphalt in the lower heating zone 22 to the upper heat preservation zone 21 along with the rotation of the rotating shaft body 32, the stirring assembly 33 is installed on the rotating shaft body 32 in the upper heat preservation zone 21 to fully mix heated asphalt with unheated asphalt along with the rotation of the rotating shaft body 32, the mixed asphalt flows from the upper heat preservation zone 21 to the lower heating zone 22 along the guide cover 35 to the lower heat preservation zone 22, the heated asphalt is heated in the whole heating zone 22, and the heated asphalt is heated in the lower heating zone 22 is heated by the heating zone.

Further, the annular heating assembly 41 includes a first heating element 411, a second heating element 412 and a third heating element 413, where the first heating element 411 and the second heating element 412 are all annular metal tubes, so that heat energy transferred during heating is more uniform, the first heating element 411 is installed at the bottom of the lower heating zone 21, the first heating element 411 is connected with a liquid outlet of the liquid outlet tube 43, so that heat conduction oil flows into the first heating element 411 tube from the liquid outlet tube 43, the third heating element 413 is a plurality of vertical metal tubes installed between the first heating element 411 and the second heating element 412, and the third heating element 413 communicates the first heating element 411 with the second heating element 412, so that heat conduction oil flows into the second heating element 412 tube from the first heating element 411 tube, the second heating element 412 is installed between the first heating element 411 and the guide cover 35, and the second heating element is connected with a liquid inlet of the liquid return tube 44, so that heat conduction oil flows into the return tube 44 from the second heating element 412 tube.

The annular heating assembly 41, the liquid outlet pipe 43 and the return pipe 44 are all made of metal materials, so that the heat conduction efficiency of the annular heating device 40 can be improved.

Wherein, the heat energy providing component 42 is an electric heating device, so that the heating efficiency of the heat conducting oil can be improved.

Wherein, the air guide sleeve 35 is a downward inclined truncated cone-shaped metal shell to accelerate the asphalt flowing from the upper heat preservation zone 21 to the lower heating zone 22, and the diameter of the air guide sleeve 35 is matched with the tank body 20.

In this embodiment, the tank 20 is provided with a feed inlet 23 and a discharge outlet 24, and both the feed inlet 23 and the discharge outlet 24 are installed at the bottom of the tank.

Wherein, two heat-insulating layers are arranged on the tank body 20, so that the heat-insulating capability of the tank body 20 is improved.

Further, the insulation asphalt storage tank 10 convenient to access further comprises an asphalt heating storage device 50 and an asphalt taking device 60, the asphalt heating storage device 50 is installed on the feeding hole 23, the asphalt heating storage device comprises an asphalt storage pipe 51, an asphalt storage pump 52 and a heating asphalt tank 53, one end of the asphalt storage pipe 51 is connected with the feeding hole 23, the other end of the asphalt storage pipe 51 is connected with the inside of the asphalt heating tank 53, the asphalt storage pump 52 is installed on the asphalt storage pipe 51 so as to pump asphalt in the asphalt heating tank 53 into the tank body 20 through the feeding hole 23, and the outside of the heating asphalt tank 53 is wound with the liquid outlet pipe 43 of the serpentine annular heating device 40 so as to provide heat energy for the inside of the heating asphalt tank 53 and heat the asphalt in the tank, so that the asphalt in the heating asphalt tank 53 maintains a liquid state and the asphalt storage rate is accelerated.

Further, the asphalt taking device 60 is installed on the discharge port 24, the asphalt taking device comprises an asphalt taking pipe 61 and an asphalt taking pump 62, one end of the asphalt taking pipe 61 is connected with the discharge port 24, and the asphalt taking pump 62 is installed on the asphalt taking pipe 61 to pump asphalt from the tank 20 to the outside through the asphalt taking pipe 61.

When asphalt is stored in the tank, the heat energy providing component 42 provides heat for the heated asphalt tank 53 through the liquid outlet pipe 43 coiled outside the heated asphalt tank 53 in a serpentine manner, when the asphalt tank truck dumps the asphalt into the heated asphalt tank 53, the asphalt heating tank 53 heats the asphalt, meanwhile, the asphalt storage pump 52 pumps the asphalt in the heated asphalt tank 53 to the feeding hole 23 through the asphalt storage pipe 51 connected with the interior of the heated asphalt tank 53, the asphalt enters the lower heating area 22 of the tank body 20 through the feeding hole 23, when the amount of the asphalt filled in the lower heating area 22 reaches a certain amount, the asphalt heat homogenizing device 30 is started, and the asphalt in the lower heating area 22 is quickly conveyed into the upper heat preservation area 21 through the spiral lifting component 34, so that the rate of asphalt storage can be improved.

When asphalt is taken from the tank, according to different asphalt taking amounts, the started equipment is different, when the taking amount is less, the annular heating device 40 is only started to heat the asphalt in the lower heating area 22, the heated asphalt is rapidly pumped into the asphalt taking pipe 61 through the discharge hole 24 by the asphalt taking pump 62, and finally the heated asphalt is pumped into the asphalt tank truck from the asphalt taking pipe 61;

when the amount of the asphalt is more, the asphalt heat homogenizing device 30 is started, firstly, the asphalt in the lower heating area 22 is heated by the annular heating device 40, the heated asphalt is conveyed into the upper heating area 21 by the rotary transportation of the spiral lifting assembly 34, the heated asphalt and unheated asphalt are mixed together in the upper heating area 21 by the rotary stirring of the stirring assembly 33, after the stirring is finished, the driving motor 31 stops driving the rotating shaft 32, the stirring assembly 33 and the spiral lifting assembly 34 stop working, the mixed asphalt flows from the upper heating area 21 to the lower heating area 22 along the air guide sleeve 35, the heated asphalt is conveyed into the upper heating area 21 to be mixed with unheated asphalt, the unheated asphalt in the upper heating area 21 is quickly converted into a liquid state, the unheated asphalt quickly falls into the lower heating area 22 along the air guide sleeve 35 to be heated under the influence of the dead weight of the asphalt, the heated asphalt is quickly pumped into the asphalt taking pipe 61 through the discharging hole 24 by the asphalt taking pump 62, and finally the heated asphalt is pumped into the asphalt taking pipe 61.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The utility model provides a heat preservation pitch storage tank convenient to access, its characterized in that, including the jar body, pitch heat homogenization device, annular heating device set up inside the jar body, annular heating device includes annular heating component, heat energy supply subassembly, drain pipe and back flow, the built-in conduction oil of annular heating device is used for transferring heat energy, the one end and the bottom of annular heating component of drain pipe are connected, and the other end and the heat energy supply subassembly of drain pipe are connected to in sending the conduction oil after heating to annular heating component, the one end and the top of back flow are connected with the heat energy supply subassembly, in order to send the conduction oil that gives off heat energy to the heat energy supply subassembly and reheat, continuously provide heat energy in the conduction oil through circulation heating to annular heating component, annular heating component installs in the bottom in the jar, with the pitch of the internal storage of heating jar, the top of pitch heat homogenization device is installed at jar body top, the bottom of pitch heat homogenization device passes behind the annular heating component with the internal bottom of jar is connected to heat energy supply subassembly to send the conduction oil after heating, the other end and heat energy supply subassembly to the top of back flow is connected with the top of annular heating component, and the pitch heat homogenization device is the pitch with the internal heat of the whole pitch of the jar body with the internal heat rate of taking of pitch of the jar, and the internal heat change rate of pitch is guaranteed to be the whole in the jar.

2. A storage tank for warm asphalt for easy access as defined in claim 1, wherein: the asphalt heat homogenizing device comprises a driving motor, a rotating shaft body, a stirring assembly, a spiral lifting assembly and a guide cover, wherein the guide cover is arranged in a tank body so as to divide the tank body into an upper heat-preserving zone and a lower heat-preserving zone, the driving motor is arranged at the top end of the tank body, the bottom end of the rotating shaft body is arranged at the bottom end of the tank body, the top end of the rotating shaft body is arranged in the driving motor so that the driving motor drives the rotating shaft body to do rotary motion in the tank body, the spiral lifting assembly is arranged on the rotating shaft body in the lower heat-preserving zone so as to transport heated asphalt in the lower heat-preserving zone to the upper heat-preserving zone along with the rotation of the rotating shaft body, the stirring assembly is arranged on the rotating shaft body in the upper heat-preserving zone so as to fully mix the heated asphalt with unheated asphalt along the guide cover, the mixed asphalt flows from the upper heat-preserving zone to the lower heat-preserving zone, the heated asphalt in the lower heat-preserving zone is transported to the upper heat-preserving zone, and the mixed asphalt flows back to the lower heat-preserving zone, so that the heat energy is uniformly transferred in the asphalt, and the whole heating efficiency is accelerated.

3. A storage tank for warm asphalt for easy access as defined in claim 1, wherein: the tank body is provided with a feed inlet and a discharge outlet, and the feed inlet and the discharge outlet are both arranged at the bottom of the tank body.

4. A storage tank for warm asphalt for easy access as defined in claim 1, wherein: the utility model provides a heat preservation pitch storage tank convenient to access still includes pitch heating storage device, pitch heating storage device installs on the pan feeding mouth, pitch heating storage device includes pitch storage tube, pitch storage pump and heating pitch groove, the one end and the feed inlet of pitch storage tube are connected, the other end and the pitch heating groove internal connection of pitch storage tube, pitch storage pump installs on the pitch storage tube to with pitch in the pitch heating groove pump to the jar internal through the pan feeding mouth, the outside of heating pitch groove is around there being the drain pipe of serpentine annular heating device, with the inside heat energy that provides of heating pitch inslot and heating inslot pitch, makes the pitch of heating pitch inslot maintain the liquid state for pitch storage rate.

5. A storage tank for warm asphalt for easy access as defined in claim 1, wherein: the insulation asphalt storage tank convenient to access still includes the pitch and takes the device, the pitch is taken the device and is installed on the discharge gate, the pitch is taken the device and is taken the pipe, pitch and take the pump including pitch, pitch is taken the one end of pipe and is connected with the discharge gate, pitch is taken the pump and is installed on pitch is taken the pipe to take the pipe through pitch and pump pitch to external from the jar internal pumping.

6. A storage tank for warm asphalt for easy access as defined in any one of claims 1 to 5, wherein: the annular heating assembly comprises a first heating element, a second heating element and a third heating element, wherein the first heating element and the second heating element are annular metal pipes, the first heating element is arranged at the bottom of a lower heating area, the first heating element is connected with a liquid outlet of a liquid outlet pipe so that heat conduction oil flows into the first heating element pipe from the liquid outlet pipe, the third heating element is a plurality of vertical metal pipes arranged between the first heating element and the second heating element, the third heating element is communicated with the inside of the first heating element and the inside of the second heating element so that heat conduction oil flows into the second heating element pipe from the first heating element pipe, the second heating element is arranged between the first heating element and a guide cover, and the second heating element is connected with a liquid inlet of a return pipe so that heat conduction oil flows into the return pipe from the second heating element pipe.

7. A storage tank for warm asphalt for easy access as defined in claim 6, wherein: the kuppe is the round platform form metal casing of downward sloping to accelerate the speed that pitch flows from upper portion heat preservation district to lower part heating zone, the diameter of kuppe cooperatees with the jar body, the kuppe welds in the jar body inside.

8. A storage tank for warm asphalt for easy access as defined in claim 6, wherein: the annular heating assembly, the liquid outlet pipe and the return pipe are all made of metal materials, so that the heat conduction efficiency of the annular heating device is improved.

9. A storage tank for warm asphalt for easy access as defined in claim 6, wherein: two heat preservation layers are arranged on the tank body, so that the heat preservation capacity of the tank body is improved.