CN213376180U - Heating modification skid-mounted device for cold asphalt transportation - Google Patents

Heating modification skid-mounted device for cold asphalt transportation Download PDF

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Publication number
CN213376180U
CN213376180U CN202021982391.9U CN202021982391U CN213376180U CN 213376180 U CN213376180 U CN 213376180U CN 202021982391 U CN202021982391 U CN 202021982391U CN 213376180 U CN213376180 U CN 213376180U
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China
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pipe
heating
asphalt
storage tank
oil
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CN202021982391.9U
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Chinese (zh)
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王建芳
姜天凯
王旭亮
李志远
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Shandong Chambroad Logistics Co ltd
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Shandong Chambroad Logistics Co ltd
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Abstract

The utility model relates to a cold attitude pitch transportation is with heating modification sled dress device, including modified holding vessel one and modified holding vessel two, the top of modified holding vessel one is connected with pitch and advances pipe and inlet pipe, modified holding vessel one bottom is connected with discharging pipe one, discharging pipe one is connected with the conveying pump, the conveying pump is connected with the colloid mill, the exit linkage of colloid mill has conveying pipeline two, the two other ends of conveying pipeline are connected with conveying pipeline three respectively and conveying pipeline four, two bottoms of modified holding vessel are connected with discharging pipe two, be equipped with valve one and valve two on discharging pipe one and the discharging pipe two respectively, be equipped with valve three respectively and valve four on conveying pipeline three and the conveying pipeline four, pitch advances union coupling pitch heating conveyor. The utility model discloses a set up two modified holding vessel and cooperate the colloid pump that uses with them, can modify according to the demand after carrying the cold state pitch heating of destination, solve present transportation pitch and deliver the product simultaneously comparatively single, the not strong problem of market adaptability.

Description

Heating modification skid-mounted device for cold asphalt transportation
Technical Field
The utility model relates to a cold state pitch transportation is with heating modification sled dress device belongs to pitch and carries technical field.
Background
High-temperature asphalt is filled in the matched stack formula asphalt box after passing through the heat exchanger heat transfer for the general cargo transportation of cold state asphalt, and cold state asphalt transportation can be used for long-distance transport, has arrived the freight site after, utilizes heating device to heat cold state asphalt, and the asphalt after the heating just can use, but, present transportation can only transport an asphalt basically, causes that the delivery product is comparatively single simultaneously, and market adaptability is not strong.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cold state pitch transportation is with heating modification sled dress device solves present transportation pitch and delivers the product simultaneously comparatively single, the not strong problem of market adaptability.
The utility model relates to a heating modification skid-mounted device for cold asphalt transportation, which comprises a first modification storage tank and a second modification storage tank, wherein stirring devices are respectively arranged in the first modification storage tank and the second modification storage tank, heat preservation devices are respectively arranged at the outer sides of the first modification storage tank and the second modification storage tank, the top of the first modification storage tank is connected with an asphalt inlet pipe and an asphalt inlet pipe, the bottom of the first modification storage tank is connected with a first discharge pipe, the first discharge pipe is connected with a material delivery pump, the material delivery pump is connected with a first material delivery pipe, the first material delivery pipe is connected with a colloid mill, the outlet of the colloid mill is connected with a second material delivery pipe, the other end of the second material delivery pipe is respectively connected with a third material delivery pipe and a fourth material delivery pipe, the third material delivery pipe and the fourth material delivery pipe are respectively connected with the first modification storage tank and the second modification storage tank, the bottom of the second modification storage tank is connected with, and a third valve and a fourth valve are respectively arranged on the third conveying pipe and the fourth conveying pipe, and the asphalt inlet pipe is connected with an asphalt heating and conveying device.
Preferably, the stirring device comprises a stirring shaft, a stirring motor is fixedly connected to the upper end of the stirring shaft, a stirrer is fixed to the lower end of the stirring shaft, a support sleeve is sleeved at the bottom of the stirring shaft, a wear-resistant sleeve is sleeved in the support sleeve and fixed to the wear-resistant sleeve, a support frame is fixed to the bottom of the support sleeve, and a spiral stirring belt is fixed to the bottom end of the stirring shaft. The blanking and the stirring can be better carried out.
Preferably, the heat preservation device is equipped with the heat preservation including setting up the heating jacket in modified holding vessel one and two outsides of modified holding vessel, the outside of heating jacket, and the heating is convenient, and it is effectual to keep warm, and the bottom of heating jacket is connected with steam and advances the pipe, and the upper portion of heating jacket is connected with the steam exit tube, and the conveying pipeline is connected with row material pipe, arranges and is equipped with valve five on the material pipe, conveniently discharges modified asphalt.
Preferably, pitch heating conveyor includes pitch heating device and sets up charge pump and the valve six on pitch advances the pipe, pitch heating device includes the base, whole modification unit all can install on the base, be equipped with heating box and heat conduction oil stove on the base, the circulating pump is connected to the oil-out of heat conduction oil stove, the lower part is equipped with heating coil in the heating box, the exit linkage circulating pump export of heating coil, the exit linkage circulating pump import of heating coil, be equipped with the pitch export on the heating box, heating box top is equipped with the dog-house, heat conduction oil stove top is equipped with the exhanst gas outlet, the exhanst gas outlet passes through the pipe connection air exhauster, the sparse tuber pipe in the heating box is connected to. Heating device can cut apart solid-state pitch into the fritter and put into the heating cabinet in and heat through heating coil to can be leading-in the flue gas air duct interior auxiliary heating of heating cabinet to the flue gas of stove, accelerate pitch liquefaction speed, the heating is more even. The asphalt inlet pipe can be provided with a flowmeter.
Preferably, the oil return port of the heat conduction oil furnace is connected with an oil-gas separator through a pipeline, the top of the oil-gas separator is connected with an expansion tank through an expansion pipe, a valve is arranged on the expansion pipe, the top of the expansion tank is connected with an oil injection pump through an oil injection pipe, the oil injection pump is connected with an oil storage tank through a pipeline, and the top of the oil storage tank is connected with an oil discharge port of the heat conduction oil furnace through a pipeline. Utilize the expansion tank to store the heat after being heated, can also supply organic heat carrier, gaseous in intensification process discharge heat conduction oil furnace and the system, earlier with oil injection expansion tank in during the oiling, in the automatic heat conduction oil furnace that flows into, play the middle groove effect, replace the hot medium in the heat conduction oil furnace with cold oil during the power failure, protect the heat conduction oil furnace, still act as high-order supplementary pressure head effect.
Preferably, a movable frame is fixed on the top of the base, and the expansion groove is fixed on the top of the movable frame.
Preferably, angle steel is uniformly arranged on the feeding port, and a cutting edge is arranged on the top edge of the angle steel, so that asphalt can be cut into small blocks during feeding, and the asphalt is conveniently and rapidly heated.
Preferably, the heating coil is of a multilayer structure, each layer of S-shaped feeding is arranged on the same horizontal plane, two adjacent layers of heating coils are communicated, and the two adjacent layers of heating coils are arranged in a staggered mode in the up-down direction. The heating is more uniform.
Preferably, a temperature measuring port is arranged on the heating box body, and a thermometer is arranged on the temperature measuring port.
Preferably, an asphalt return pipe is arranged on the heating box body and connected with a delivery pump, and an outlet of the delivery pump is communicated with the inside of the heating box body through a pipeline. The asphalt in the heating box body can flow circularly, so that the asphalt is heated more uniformly.
Preferably, the top of oil storage tank and the top of inflation groove all are equipped with the evacuation pipe, and the bottom of oil storage tank is equipped with the blow off pipe. The right-hand member of base is fixed with and rolls over the arm and hangs, and heating equipment increases heat conduction oil furnace, heating and melts case, the integrated modular design of lifting device, and the transportation of being convenient for reduces the on-the-spot equipment time.
The utility model discloses, following beneficial effect has:
through setting up two modified holding vessel and the colloid pump with their cooperation use, can carry the cold state pitch heating back of destination to carry and modify according to the demand, solve present transportation pitch and deliver the product simultaneously comparatively single, problem that market adaptability is not strong, and two jar bodies can grind in turn, improve grinding efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a modification apparatus;
FIG. 3 is a schematic structural diagram of an oil supply device;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 2;
in the figure: 1. an asphalt inlet pipe 2, an inlet pipe 3, a stirring motor 4, a modified storage tank I, a modified storage tank II, a modified, 12. the device comprises a first material conveying pipe, a first material conveying pipe 13, a third valve 14, a fourth valve 15, a fourth material conveying pipe 16, a second modified storage tank 17, a second material conveying pipe 18, a stirring shaft 19, a support sleeve 20, a second material conveying pipe 21, a colloid mill 22, a fifth valve 23, a second valve 24, a first valve 25, a support frame 26, a first material conveying pipe 27, a stirring belt 28, a wear-resistant sleeve 29, a feeding pump 30 and a sixth valve.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1 to 4, the utility model relates to a heating modification skid-mounted device for transporting cold asphalt, which comprises a first modification storage tank 4 and a second modification storage tank 16, wherein both the first modification storage tank 4 and the second modification storage tank 16 are provided with stirring devices, both the first modification storage tank 4 and the second modification storage tank 16 are provided with heat preservation devices, the top of the first modification storage tank 4 is connected with an asphalt inlet pipe 1 and an inlet pipe 2, the bottom of the first modification storage tank 4 is connected with a first discharge pipe 26, the first discharge pipe 26 is connected with a delivery pump 10, the delivery pump 10 is connected with a first delivery pipe 12, the first delivery pipe 12 is connected with a colloid mill 21, the outlet of the colloid mill 21 is connected with a second delivery pipe 17, the other end of the second delivery pipe 17 is respectively connected with a third delivery pipe 5 and a fourth delivery pipe 15, the third delivery pipe 5 and the fourth delivery pipe 15 are respectively connected with the first modification storage tank 4 and the second modification storage tank 16, the bottom of, the second discharging pipe 20 is connected with the inlet of the material conveying pump 10, the first discharging pipe 26 and the second discharging pipe 20 are respectively provided with a first valve 24 and a second valve 23, the third conveying pipe 5 and the fourth conveying pipe 15 are respectively provided with a third valve 13 and a fourth valve 14, and the asphalt inlet pipe 1 is connected with the asphalt heating and conveying device 7.
The stirring device comprises a stirring shaft 18, a stirring motor 3 is fixedly connected to the upper end of the stirring shaft 18, a stirrer 9 is fixed to the lower end of the stirring shaft 18, a support sleeve 19 is sleeved at the bottom of the stirring shaft 18, a wear-resistant sleeve 28 is sleeved in the support sleeve 19, the wear-resistant sleeve 28 is fixed to the support sleeve 19, a support frame 25 is fixed to the bottom of the support sleeve 19, and a spiral stirring belt 27 is fixed to the bottom end of the stirring shaft 18.
The heat preservation device is equipped with the heat preservation including setting up the heating jacket 8 in the modified holding vessel one 4 and the two 16 outsides of modified holding vessel, the outside of heating jacket 8, and the bottom of heating jacket 8 is connected with steam and advances the pipe, and the upper portion of heating jacket 8 is connected with steam exit tube 6, and conveying pipeline one 12 is connected with row material pipe 11, arranges and is equipped with five 22 of valves on the material pipe 11.
The asphalt heating and conveying device 7 comprises an asphalt heating device, a feeding pump 29 and a valve six 30, wherein the feeding pump 29 and the valve six 30 are arranged on an asphalt inlet pipe 1, the asphalt heating device comprises a base 7-1, a heating box 7-11 and a heat conduction oil furnace 7-5 are arranged on the base 7-1, an oil outlet of the heat conduction oil furnace 7-5 is connected with a circulating pump 7-4, a heating coil 7-13 is arranged at the inner lower part of the heating box 7-11, an inlet of the heating coil 7-13 is connected with an outlet of the circulating pump 7-4, an outlet of the heating coil 7-13 is connected with an inlet of the circulating pump 7-4, an asphalt outlet is arranged on the heating box 7-11, the asphalt outlet is connected with the asphalt inlet pipe 1, a feeding port 7-12 is arranged at the top of the heating box 7-11, a flue gas outlet 7, the exhaust fan is connected with the air distributing pipe in the heating box body 7-11.
The oil return port of the heat conduction oil furnace 7-5 is connected with an oil-gas separator 7-9 through a pipeline, the top of the oil-gas separator 7-9 is connected with an expansion tank 7-8 through an expansion pipe, a valve is arranged on the expansion pipe, the top of the expansion tank 7-8 is connected with an oil injection pump 7-3 through an oil injection pipe, the oil injection pump 7-3 is connected with an oil storage tank 7-2 through a pipeline, the top of the oil storage tank 7-2 is connected with an oil discharge port of the heat conduction oil furnace 7-5 through a pipeline, a movable frame 7-7 is fixed at the top of the base 7-1, and the expansion tank 7-8 is fixed at the top of the movable.
Angle steel is uniformly arranged on the feeding ports 7-12, and the top edge of the angle steel is provided with a cutting edge; the heating coils 7-13 are of a multilayer structure, each layer is in an upper snake-shaped feeding mode on the same horizontal plane, two adjacent layers of heating coils 7-13 are communicated, and the two adjacent layers of heating coils 7-13 are arranged in a staggered mode in the up-down direction.
A temperature measuring port 7-14 is formed in the heating box body 7-11, and a thermometer is arranged on the temperature measuring port 7-14; and an asphalt return pipe is arranged on the heating box body 7-11 and is connected with a delivery pump, and the outlet of the delivery pump is communicated with the inside of the heating box body 7-11 through a pipeline.
The top of the oil storage tank 7-2 and the top of the expansion tank 7-8 are both provided with emptying pipes 7-15, and the bottom of the oil storage tank 7-2 is provided with a sewage discharge pipe 7-17.
When the device works, detached cold asphalt blocks are unloaded from a tonnage box, solid asphalt is put in from a feeding port 7-12 by using a forklift or a folding arm crane, the solid asphalt is cut into small blocks under the action of angle steel and enters a heating box body 7-11, the small blocks and the heat conducting oil enter a heating coil pipe 7-13 through a circulating pump 7-4 to carry out heat exchange with heat conducting oil of a heat conducting oil furnace 7-5, the solid asphalt is heated, high-temperature flue gas discharged from a flue gas outlet is led into an air conveying pipe in the heating box body 7-11 through an air exhauster to carry out secondary heating, the heating speed is accelerated, and the heating is more uniform. When oil is filled at first, a pipeline valve at the top of the oil storage tank 7-2 is closed, the oil filling pump 7-3 extracts an external oil source and then injects the external oil source into the expansion tank 7-8, and an expansion pipe at the bottom of the expansion tank 7-8 is reserved in the heat-conducting oil furnace 7-5 through the oil-gas separator 7-9. After the oil is injected, the valves on the expansion pipes 7-8 and the oil return pipe are closed, when the equipment is powered off, opening a pipeline on the expansion pipe 7-8 and connecting the oil storage tank 7-2 and the heat conduction oil furnace 7-5 and a valve on an oil return pipe, leading cold oil in the expansion tank 7-8 to enter the heat conduction oil furnace 7-5 from the oil-gas separator 7-9, then hot oil in the heat conduction oil furnace 7-5 is pressed to enter the oil storage tank 7-2 to finish cold oil replacement of the hot oil, when the circuit is recovered, the oil filling pump 7-3 pumps hot oil in the oil storage tank 7-2, then the cold oil is injected into an expansion tank 7-8, then the cold oil flows back into a heat conduction oil furnace 7-5 through an expansion pipe and an oil-gas separator 7-9, and the cold oil in the heat conduction oil furnace 7-5 is pressed into an oil storage tank 7-2, so that the cold-hot oil circulation is completed.
Opening a sixth valve 30 of the heated asphalt, feeding the heated asphalt into a first modified storage tank from an asphalt inlet pipe 1 through a feeding pump 29, then putting modified raw materials into a feeding pipe 2, stirring and mixing the modified raw materials by driving a stirrer 9 through a stirring motor 3, then opening a first valve 24, closing a second valve 23, opening a fourth valve 14, closing a third valve 13, feeding the mixed materials into a colloid mill 21 from a discharging pipe 26 through a material conveying pump 10 for grinding, then feeding the mixed materials into a second modified storage tank 16, opening the second valve 23 and the fourth valve 14, closing the first valve 24 and the third valve 13 when the materials in the second modified storage tank 16 need to be circularly ground, pumping the materials in the second modified storage tank 16 through the material conveying pump 10, then conveying the materials to the colloid mill 21 for grinding, then returning to the second modified storage tank 16, and closing and opening the second valve 23 and the fourth valve 14 when the materials in the first modified storage tank 4 are circularly ground, and opening the first valve 24 and the third valve 13, pumping the materials in the first modification storage tank 4 by the delivery pump 10, conveying the materials to the colloid mill 21 for grinding, and returning the materials to the first modification storage tank 4.
The utility model discloses a set up two modified holding vessel and with the colloid pump that they cooperate and use, can modify according to the demand after carrying the cold state pitch heating of destination, solve present transportation pitch and deliver the product comparatively single simultaneously, the not strong problem of market adaptability, and two jar bodies can grind in turn, improve grinding efficiency. Heating device can cut apart solid-state pitch into the fritter and heat through heating coil in putting into the heating cabinet, and can be leading-in the flue gas air duct interior auxiliary heating of heating cabinet internal to the flue gas of stove, accelerate pitch liquefaction speed, it is more even to heat, utilize the expansion tank to store the heat after being heated, can also supply organic heat carrier, gaseous in intensification process discharge heat conduction oil furnace and the system, earlier pour into the expansion tank with oil during the oiling, automatically, flow into in the heat conduction oil furnace, play the middle groove effect, replace the hot medium in the heat conduction oil furnace with cold oil during the power failure, protect the heat conduction oil furnace, still act as high-order supplementary pressure head effect.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims (8)

1. The utility model provides a cold state pitch transportation is with heating modification sled dress device which characterized in that: the asphalt modified storage tank comprises a first modified storage tank (4) and a second modified storage tank (16), stirring devices are arranged in the first modified storage tank (4) and the second modified storage tank (16), heat preservation devices are arranged on the outer sides of the first modified storage tank (4) and the second modified storage tank (16), the top of the first modified storage tank (4) is connected with an asphalt inlet pipe (1) and an asphalt inlet pipe (2), the bottom of the first modified storage tank (4) is connected with a first discharge pipe (26), the first discharge pipe (26) is connected with a feed delivery pump (10), the feed delivery pump (10) is connected with a first feed delivery pipe (12), the first feed pipe (12) is connected with a colloid mill (21), the outlet of the colloid mill (21) is connected with a second feed pipe (17), the other end of the second feed pipe (17) is respectively connected with a third feed pipe (5) and a fourth feed pipe (15), the third feed pipe (5) and the fourth feed pipe (15) are respectively connected with the first modified storage tank, the bottom of the second modified storage tank (16) is connected with a second discharge pipe (20), the second discharge pipe (20) is connected with an inlet of a material conveying pump (10), a first valve (24) and a second valve (23) are respectively arranged on the first discharge pipe (26) and the second discharge pipe (20), a third valve (13) and a fourth valve (14) are respectively arranged on a third material conveying pipe (5) and a fourth material conveying pipe (15), and an asphalt inlet pipe (1) is connected with an asphalt heating and conveying device (7).
2. The cold asphalt transportation heating modification skid-mounted device of claim 1, which is characterized in that: the stirring device comprises a stirring shaft (18), a stirring motor (3) is fixedly connected to the upper end of the stirring shaft (18), a stirrer (9) is fixed to the lower end of the stirring shaft (18), a support sleeve (19) is sleeved at the bottom of the stirring shaft (18), a wear-resistant sleeve (28) is sleeved in the support sleeve (19), the wear-resistant sleeve (28) is fixed to the support sleeve (19), a support frame (25) is fixed to the bottom of the support sleeve (19), and a spiral stirring belt (27) is fixed to the bottom end of the stirring shaft (18).
3. The cold asphalt transportation heating modification skid-mounted device of claim 2, wherein: the heat preservation device is equipped with the heat preservation including setting up heating jacket (8) in modified holding vessel (4) and modified holding vessel two (16) outsides, the outside of heating jacket (8) is equipped with the heat preservation, and the bottom of heating jacket (8) is connected with steam and advances the pipe, and the upper portion of heating jacket (8) is connected with steam outlet pipe (6), and conveying pipeline (12) are connected with row material pipe (11), are equipped with five (22) of valve on arranging material pipe (11).
4. The cold asphalt transportation heating modification skid-mounted device of claim 1, which is characterized in that: the asphalt heating and conveying device (7) comprises an asphalt heating device, a feeding pump (29) and a valve six (30), wherein the feeding pump (29) and the valve six (30) are arranged on an asphalt inlet pipe (1), the asphalt heating device comprises a base (7-1), a heating box body (7-11) and a heat conduction oil furnace (7-5) are arranged on the base (7-1), an oil outlet of the heat conduction oil furnace (7-5) is connected with a circulating pump (7-4), a heating coil (7-13) is arranged at the lower part in the heating box body (7-11), an inlet of the heating coil (7-13) is connected with an outlet of the circulating pump (7-4), an outlet of the heating coil (7-13) is connected with an inlet of the circulating pump (7-4), an asphalt outlet is arranged on the heating box body (7-11), the asphalt outlet is connected with the asphalt inlet pipe (1), a, the top of the heat-conducting oil furnace (7-5) is provided with a flue gas outlet (7-6), the flue gas outlet (7-6) is connected with an exhaust fan through a pipeline, and the exhaust fan is connected with an air distributing pipe in the heating box body (7-11).
5. The cold asphalt transportation heating modification skid-mounted device of claim 4, wherein: the oil return port of the heat conduction oil furnace (7-5) is connected with an oil-gas separator (7-9) through a pipeline, the top of the oil-gas separator (7-9) is connected with an expansion tank (7-8) through an expansion pipe, a valve is arranged on the expansion pipe, the top of the expansion tank (7-8) is connected with an oil injection pump (7-3) through an oil injection pipe, the oil injection pump (7-3) is connected with an oil storage tank (7-2) through a pipeline, the top of the oil storage tank (7-2) is connected with the oil discharge port of the heat conduction oil furnace (7-5) through a pipeline, a movable frame (7-7) is fixed at the top of the base (7-1), and the expansion tank (7-8) is fixed at the top of.
6. The cold asphalt transportation heating modification skid-mounted device of claim 5, wherein: angle steel is uniformly arranged on the feeding ports (7-12), and the top edge of the angle steel is provided with a cutting edge; the heating coils (7-13) are of a multilayer structure, each layer of the heating coils is fed in a snake shape on the same horizontal plane, two adjacent layers of the heating coils (7-13) are communicated, and the two adjacent layers of the heating coils (7-13) are arranged in a staggered mode in the up-down direction.
7. The cold asphalt transportation heating modification skid-mounted device of claim 6, wherein: a temperature measuring port (7-14) is arranged on the heating box body (7-11), and a thermometer is arranged on the temperature measuring port (7-14); an asphalt return pipe (7-10) is arranged on the heating box body (7-11), the asphalt return pipe (7-10) is connected with a delivery pump, and the outlet of the delivery pump is communicated with the inside of the heating box body (7-11) through a pipeline.
8. The cold asphalt transportation heating modification skid-mounted device of claim 7, wherein: the top of the oil storage tank (7-2) and the top of the expansion tank (7-8) are both provided with emptying pipes (7-15), and the bottom of the oil storage tank (7-2) is provided with a sewage discharge pipe (7-17).
CN202021982391.9U 2020-09-11 2020-09-11 Heating modification skid-mounted device for cold asphalt transportation Active CN213376180U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021982391.9U CN213376180U (en) 2020-09-11 2020-09-11 Heating modification skid-mounted device for cold asphalt transportation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021982391.9U CN213376180U (en) 2020-09-11 2020-09-11 Heating modification skid-mounted device for cold asphalt transportation

Publications (1)

Publication Number Publication Date
CN213376180U true CN213376180U (en) 2021-06-08

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Application Number Title Priority Date Filing Date
CN202021982391.9U Active CN213376180U (en) 2020-09-11 2020-09-11 Heating modification skid-mounted device for cold asphalt transportation

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