CN207551007U - The vehicle-mounted electric heater unit of pitch and system, asphalt transport tank vehicle of Power auto-adjustment - Google Patents

Abstract

The utility model discloses the vehicle-mounted electric heater units of pitch and system of Power auto-adjustment, including heat-resisting sleeve, are connect in the heat-resisting sleeve inserted with electrical heating radiant tube, the heat-resisting sleeve with electrical heating radiant tube using fixed form；Electrical heating radiant tube can realize that the thermal energy that automatic adjustment power is generated under corresponding power then allows heat to radiate the tube wall to heat-resisting sleeve so as to heat the pitch around heat-resisting sleeve.The utility model can effectively control the temperature of metal sleeve by the way of Power auto-adjustment, and avoiding the occurrence of high temperature makes asphalt coking, while avoids the waste of power.

Description

Asphalt on-board electric heating device and system with automatic power adjustment, asphalt transport tanker

technical field

The utility model relates to the technical field of asphalt heating, in particular to a vehicle-mounted electric heating device for asphalt with automatic power adjustment, a system and a use method thereof.

Background technique

Asphalt is an important road engineering material. Due to the needs of users, asphalt needs to be transported from the place of origin to the user's location, and the transportation distance is usually long. After long-distance transportation, asphalt condenses into a solid state with poor fluidity and cannot be unloaded. It needs to be heated to make it have a certain fluidity before it can be unloaded. The commonly used asphalt heating technology in China generally adopts the built-in fire tube in the asphalt tank, uses diesel oil and natural gas to heat the asphalt, generates high-temperature flue gas through its combustion, and realizes heat exchange with the low-temperature heated asphalt through the heat exchange device (fire tube). And then complete the heating process, usually called open flame heating or fire tube heating.

The technical problems of the above-mentioned open flame direct heating technology are: the heating equipment is simple and easy to operate, but the heating is slow, the flame temperature in the fire tube is uneven, the asphalt in the high temperature part is easy to coke, and a large amount of heat is discharged with the flue gas, so the energy consumption is high and the thermal efficiency is low. At the same time, the environment is seriously polluted, and the operation process is accompanied by certain dangers.

In the prior art, there is still the fact that the heat transfer oil technology adopted in China can achieve uniform heating, but the equipment is relatively complicated, and the problem of heat transfer oil leakage needs to be considered.

Foreign railway asphalt tank cars usually use steam heating. The steam heating method is to drive a small steam generator with fuel or electric energy, and use water as the medium to perform secondary heat exchange on the asphalt. However, this method generally operates at a lower pressure and is difficult. A higher temperature is obtained, so the thermal efficiency of the system cycle is very low, usually at 30%-40%.

To sum up, in the prior art, there is still no effective solution to the technical problems of asphalt vehicle heating.

Utility model content

In order to solve the deficiencies of the prior art, the utility model provides an asphalt vehicle-mounted electric heating device with automatic power adjustment, which adopts the electric radiant tube heating method, which can realize automatic adjustment of heating power, controllable working temperature, and has high thermal efficiency, It has the advantages of no pollution and good safety. At the same time, the equipment is simple, easy to repair and maintain, very suitable for engineering use.

The asphalt vehicle-mounted electric heating device with automatic power adjustment includes a heat-resistant sleeve, an electric heating radiant tube is inserted into the heat-resistant sleeve, and the heat-resistant sleeve and the electric heating radiant tube are connected in a fixed manner;

The electric heating radiant tube can automatically adjust the power to generate heat energy under the corresponding power, and then let the heat radiate to the tube wall of the heat-resistant sleeve to heat the asphalt around the heat-resistant sleeve.

Further, the inner core resistance wires of the electric heating radiant tube are arranged in a U-shape axially and welded at the ends, and a terminal is left at the end.

Further, the heat-resistant sleeve is a metal sleeve.

Further, the electric heating radiant tube and the heat-resistant sleeve are connected by a flange.

Further, the electric heating radiant tube is a squirrel-cage electric heating radiant tube, and the squirrel-cage electric heating radiant tube includes an insulating ceramic sheet, and a squirrel-cage heating element is set on the insulating ceramic sheet, and the squirrel-cage heating element The heating element is wound with a resistance wire, and the resistance wire is connected with a lead-out rod, and an insulating ceramic cover is arranged on the lead-out rod to realize the cooperative connection between the squirrel-cage electric heating radiant tube and the heat-resistant casing.

The utility model also discloses an asphalt vehicle-mounted electric heating system with automatic power adjustment. The system includes at least one above-mentioned asphalt vehicle-mounted electric heating device with automatic power adjustment, and the electric heating devices are all connected to the power distribution cabinet through terminal posts.

The utility model also discloses a heating method for an asphalt vehicle-mounted electric heating system with automatic power adjustment, including:

When using, set a radiant tube heating temperature and a dangerous temperature in advance, and then the electric heating radiant tube starts to heat automatically. When the asphalt temperature is far from the set radiant tube heating temperature, use 100% power to heat. When the temperature is close to the set radiant tube When heating the temperature, adjust the power to make it drop. The closer to the set radiant tube heating temperature, the smaller the corresponding power. After reaching the set radiant tube heating temperature, keep a lower set power for heating. At this time, the electric heating radiates The temperature of the tube changes slowly, and the heating is steady, and when the dangerous temperature is reached, the heating is stopped.

The utility model also discloses an asphalt transport tank car. The above-mentioned asphalt vehicle-mounted electric heating system with automatic power adjustment is installed on the asphalt transport tank car. There are several flange holes on the bottom of one end of the tank car. The positions of the flange holes are Arranged symmetrically with respect to the center line, the heat-resistant sleeve is inserted into the flange hole, and the end of the heat-resistant sleeve is welded on the tank car.

Compared with the prior art, the beneficial effects of the utility model are:

(1) When the overall heating device of the utility model is heated, the electric radiation heating tube does not directly contact the asphalt, which has higher safety.

(2) The power of the electric heating radiant tube of the overall heating device of the utility model is adjustable, and the temperature is controllable to avoid power waste. Effectively improve heating efficiency and increase heating speed.

(3) The electric heating radiant tube of the utility model can independently adjust the temperature, the electric heating radiant tube and the heat-resistant casing are detachable, and have good maintenance and repairability.

(4) The utility model adopts a heating system design and is equipped with a corresponding power distribution cabinet, which is easy to operate.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is the structural schematic diagram of electric heating radiant tube;

Fig. 2 is a structural schematic diagram of a heat-resistant sleeve;

Figure 3 is a layout diagram of the electric heating device in the tank car;

In the figure, 1. Insulating ceramic cover; 2. Leading rod for wiring; 3. Resistance wire; 4. Corundum insulating ceramic sheet; 5. Squirrel cage heating element; 6. Metal sleeve.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

As introduced in the background technology, there are technical problems of asphalt on-board heating in the prior art. In order to solve the above technical problems, this application proposes an asphalt on-board electric heating device and system with automatic power adjustment.

In a typical implementation of the present application, an asphalt vehicle-mounted electric heating device with automatic power adjustment is provided. The asphalt vehicle-mounted electric heating device with automatic power adjustment includes a metal sleeve, and a squirrel-cage electric heater is inserted into the metal sleeve. The radiant tube, the squirrel-cage electric heating radiant tube and the metal casing are connected by flanges, and the inner core of the squirrel-cage electric heating radiant tube is welded in a U-shape axial arrangement with resistance wires, and a terminal is left at the end.

In this application, the metal casing 6 needs to be connected with the tank car body, mainly to support and isolate the electric heating radiant tube. The casing is in direct contact with the transport medium (asphalt) in the tank car, so it must be made of metal. Currently, electric heating The radiant tube is generally made of stainless steel metal casing.

There are many structures of electric heating radiant tubes, usually there are core type spiral electric radiant tubes, exoskeleton type spiral electric radiant tubes and squirrel cage type electric radiant tubes. In the preferred implementation example, the present application chooses the squirrel-cage electric radiation tube structure that is widely used at home and abroad, and the technology is relatively mature and has a long service life.

The structure of the squirrel cage electric heating radiant tube is shown in Figure 1. The squirrel cage electric heating radiant tube includes a corundum insulating ceramic sheet 4, and a squirrel cage heating element 5 is set on the corundum insulating ceramic sheet 4. The squirrel cage The heating element 5 is wound with a resistance wire 3, and the resistance wire 3 is connected with the lead-out rod 2, and the lead-out rod 2 is also provided with an insulating ceramic cover 1 to realize the squirrel-cage electric heating radiant tube and the heat-resistant casing. the mating connection.

The structure of the metal sleeve 6 is shown in FIG. 2 , and the metal sleeve 6 is used to insert the squirrel-cage electric heating radiant tube.

In another embodiment of the present application, an asphalt vehicle-mounted electric heating system with automatic power adjustment is also disclosed, which includes at least one of the above-mentioned asphalt vehicle-mounted electric heating devices with automatic power adjustment, and the electric heating devices are all connected to the Power distribution cabinet, each tank car is equipped with a power distribution cabinet, the power distribution cabinet is placed on the ground, and the length of the cable depends on the need.

The heat energy of the above-mentioned system radiates to the tube wall, and then heats the surrounding asphalt. The temperature of the radiant tube can be automatically adjusted according to the set temperature to realize temperature control, avoid power waste, and avoid coking of the surrounding asphalt caused by high temperature. And the heating mode can be flexibly adjusted according to the running conditions of the tanker, and the electric radiant tube is easy to repair and replace.

In yet another embodiment of the present application, an asphalt transport tank car is also disclosed. The above-mentioned asphalt vehicle-mounted electric heating system with automatic power adjustment is installed on the asphalt transport tank car, wherein several flange holes are opened at the bottom of one end of the tank car. The position of the flange hole is arranged symmetrically with respect to the center line, the heat-resistant sleeve is inserted into the flange hole, and the end of the heat-resistant sleeve is welded on the tank car.

The implementation of the above-mentioned transport tank car is specific: 5 flange holes are opened at the bottom of one end of the tank car. The positions of the flange holes are arranged symmetrically with respect to the center line. Metal sleeves are inserted into the flange holes, and the ends of the metal sleeves are welded on the tank car.

In the above scheme, the power of a single electric radiation heating tube is large and the service life is long. Each electric radiation tube can independently adjust the power, and several of them can also be turned on separately, and the heating is flexible. Adjust the heating scheme to save energy and protect the environment. The replacement and maintenance of the electric radiation heating tube is also very simple. If there is any damage, it is only necessary to pull out the faulty electric radiation tube from the metal casing for replacement.

In yet another embodiment of the present application, the heating method of the above-mentioned system is disclosed. The electric radiation heating method is adopted, and the current flows through the resistance wire with high resistivity to generate heat energy. This process is carried out in the metal casing, and the metal casing has Heat resistance, let the heat radiate to the tube wall of the metal casing to heat the surrounding asphalt, the squirrel cage electric heating radiant tube does not directly contact with the asphalt.

The above-mentioned system can automatically adjust the power during heating. When using it, a radiant tube heating temperature and a dangerous temperature are preset, and then the squirrel-cage electric heating radiant tube starts to heat automatically. When the asphalt temperature is far from the set temperature, use 100 % power heating, when the temperature is close to the set temperature, the power starts to drop, the closer to the set temperature, the smaller the power, after reaching the set temperature, still maintain a low power heating, at this time the temperature of the radiant tube changes slowly, Steady heating. If a dangerous temperature is reached, the heating will stop immediately.

The power automatic adjustment method of the above-mentioned system can effectively control the temperature of the metal casing, avoid high temperature and coke the asphalt, and avoid waste of power at the same time. After the asphalt is heated to the softening temperature, it begins to soften and has a certain fluidity, so that the surrounding solid asphalt continuously forms a collapse, or even falls off, and the shed asphalt blocks are mixed with the asphalt fluid to form natural convection in a closed space, so as to achieve the purpose of quickly heating the asphalt of the entire tanker.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (7)

1. the vehicle-mounted electric heater unit of the pitch of Power auto-adjustment, it is characterized in that, including heat-resisting sleeve, inserted in the heat-resisting sleeve Enter to have electrical heating radiant tube, the heat-resisting sleeve is connect with electrical heating radiant tube using fixed form；

The electrical heating radiant tube can realize automatic adjustment power generate corresponding power under thermal energy then allow heat radiate to The tube wall of heat-resisting sleeve is so as to heat the pitch around heat-resisting sleeve.

2. the vehicle-mounted electric heater unit of the pitch of Power auto-adjustment as described in claim 1, it is characterized in that, the electrical heating spoke The inner core resistance wire of pipe is penetrated using U-shaped axial alignment and end welding manner, there are binding posts for end.

3. the vehicle-mounted electric heater unit of the pitch of Power auto-adjustment as described in claim 1, it is characterized in that, the heat-resisting sleeve For metal sleeve.

4. the vehicle-mounted electric heater unit of the pitch of Power auto-adjustment as described in claim 1, it is characterized in that, the electrical heating spoke It penetrates pipe and heat-resisting sleeve uses flanged joint.

5. the vehicle-mounted electric heater unit of the pitch of Power auto-adjustment as described in claim 1, it is characterized in that, the electrical heating spoke Pipe is penetrated as squirrel-cage electrical heating radiant tube, the squirrel-cage electrical heating radiant tube includes insulating ceramic film, the insulating ceramic film On be set with squirrel-cage heater, the squirrel-cage heater is wound with resistance wire, and the resistance wire is connected with wiring eduction rod, Insulating ceramics lid is additionally provided on the wiring eduction rod to realize that the cooperation of squirrel-cage electrical heating radiant tube and heat-resisting sleeve connects It connects.

6. the vehicle-mounted electric heating system of the pitch of Power auto-adjustment, it is characterized in that, which includes at least one such as claim The vehicle-mounted electric heater unit of pitch of any Power auto-adjustments of 1-5, the electric heater unit are connected by binding post To power distribution cabinet.

7. a kind of asphalt transport tank vehicle, it is characterized in that, be equipped on the asphalt transport tank vehicle power described in claim 6 from The dynamic vehicle-mounted electric heating system of pitch adjusted, wherein, several flange holes are offered in tank car one end bottom, the flange hole Position is arranged symmetrically relative to center line, and the heat-resisting sleeve is inserted into the flange hole, and the heat-resisting sleeve end is welded on On tank car.