JPH04126906U - asphalt mixture storage container - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to store an asphalt mixture in a storage container at a relatively low temperature, suppress progress of oxidative deterioration, and enable long-term storage. [Structure] A material heating chamber 8 is provided above the discharge port 2 of the storage container body 1, and a microwave oscillator 11 is attached to the outer peripheral wall of the material heating chamber 8. The asphalt mixture is stored at a relatively low temperature in the storage container main body 1, and when shipped, microwaves are irradiated from the oscillator 11 toward the asphalt mixture in the material heating chamber 8 to heat the asphalt mixture, which is a dielectric substance. Heat to the desired temperature in a short time.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an asphalt material that temporarily stores asphalt mixture, which is a road paving material. The present invention relates to a melt mixture storage container.

0002

[Conventional technology]

The asphalt mixture produced in the asphalt plant is temporarily heated and stored. It may be stored in a storage container with a thermal structure. Asphalt mixture is usually 16 It is stored in storage containers at a temperature of around 0°C, but when exposed to air, it deteriorates due to oxidation. Therefore, when storing for a long time, prevent air from entering the container. The inside of the container is replaced with inert gas, etc. to prevent oxidative deterioration as much as possible.

0003

[Problem that the idea aims to solve]

However, it is important to prevent air from entering the storage container, and to fill the inside of the container with inert gas, etc. Even if the asphalt is replaced, if stored for a long time, the asphalt will deteriorate and harden near the outlet, causing asphalt to deteriorate. It may be difficult to release the phalt mixture.

0004 Therefore, in order to deal with the above problems, the inventor of the present invention sought to improve the asphalt mixture over time. A simple experiment was conducted to determine how the penetration changes over time. I did it. First, asphalt was heated at three different temperatures: 100°C, 150°C, and 180°C. The needle is heated to a temperature of It was measured. Figure 2 shows a graph of the results. As you can see from this graph, As the temperature of the phalt increases, its penetration rate decreases rapidly. i.e. asphalt It can be seen that the higher the temperature, the faster the oxidative deterioration progresses.

[0005] In view of the above points, this invention uses asphalt mixture at the lowest possible temperature in the storage container. Oxidative degradation within the storage container by heating to the desired temperature during storage and shipment It is an object of the present invention to provide an asphalt mixture storage container that prevents the progression of purpose.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this invention has an input port at the top and a discharge port at the bottom. , in an asphalt mixture storage container having a heating and heat-retaining structure, the upper part of the discharge port A material heating chamber is provided nearby, a through hole of an appropriate size is bored in the peripheral wall of the material heating chamber, The through hole is closed with a lid made of ceramic, and microwave oscillation is applied to the lid. The device is attached via a waveguide.

[0007]

[Effect]

According to the asphalt mixture storage container according to the present invention, the asphalt mixture is normally stored at around 160°C. Store the asphalt mixture at around 100°C. And the shipping request If there is, the microwave oscillation installed in the material heating chamber near the outlet at the bottom of the storage container energize the device. Microwaves are emitted from the oscillator, and the microwaves pass through the waveguide. The waves pass through the ceramic lid and are irradiated into the material heating chamber. this microwave is applied to the asphalt mixture in the material heating chamber, the dielectric asphalt Inside the mixture, microwave electromagnetic energy is converted to thermal energy, The asphalt mixture is heated. By irradiating microwaves in this way, The asphalt mixture is released at a predetermined rate and heated to a desired temperature before being shipped. can be done.

[0008]

【Example】

An embodiment of the present invention will be described below based on the drawings.

[0009] Reference numeral 1 denotes an asphalt mixture storage container body, and a storage container is provided on the peripheral wall of the storage container body 1. Heat insulation to prevent stored asphalt mixture from curing due to temperature drop It has a structure. A discharge port 2 is formed in the lower part of the storage container main body 1, and the discharge port 2 is formed at the bottom of the storage container body 1. A discharge gate 3 is disposed at the mouth 2. The discharge gate 3 is connected to the piston rod of the cylinder 4. The pad 5 can be moved forward and backward by expanding and contracting, and air is supplied to an air source (not shown). The sealing plate 3a can be raised and lowered by an air cylinder 7 connected via a hose 6. There is. Also, around the lower surface of the discharge port 2 and the portion of the sealing plate 3a that comes into contact with the discharge port 2, For example, when the discharge gate 3 is closed, a sealing material made of an elastic material such as rubber is provided. It is a good idea to ensure that it is sealed tightly.

0010 A cylindrical part having an appropriate inner diameter is formed in the upper part of the discharge port 2 to serve as a material heating chamber 8, and the material heating chamber 8 is heated. In the peripheral wall of the material heating chamber 8, four through holes 9 of appropriate size are bored at mutually perpendicular positions. It is set up. The through hole 9 is closed with a ceramic cover 10 having a predetermined thickness. are doing. 11 emits a commonly used 2450MHz microwave. a waveguide 12 for effectively guiding microwaves to a material to be irradiated; is attached to the lid body 10.

[0011] In the middle of the waveguide 12, an isolator 13, a power monitor 14, and an impedance A dance adjuster 15 is attached. Isolator 13 is used when the amount of load is small When the microwave emitted from the oscillator 11 is not sufficiently absorbed by the load, This prevents the oscillator 11 from being destroyed by reflected waves with a high electric field reflected from the Attach to stop. The power monitor 14 is emitted from the oscillator 11 and applied to the load. Displays the power of the traveling wave traveling toward the load and the reflected wave reflecting from the load side. It is. In addition, the impedance adjuster 15 is used for all integrated components of the power supply, oscillator, and load. A device that adjusts the impedance of the waveguide 12 so that impedance matching can be achieved. This is a three-stub tuner that inserts three metal rods into the center of the waveguide 12. There is something called. Then, it is used in combination with the power monitor 14 to monitor the reflection. The impedance of the waveguide 12 is adjusted so that the wave has a minimum value.

0012 16 is an inlet for asphalt mixture, and a cylinder 17 connects the inlet gate 1 to the asphalt mixture. 8 is opened and closed. 19 is a small diameter exhaust port provided at the top of the storage container body 1; The gas accumulated in the space 20 within the storage container body 1 is gradually exhausted to the outside. Ma In addition, when the asphalt mixture is discharged from the discharge port 2, a partial vacuum is created in the storage container. There is a tendency for air to form, and simply sucking in outside air through the exhaust port 19 will not solve this problem. Since it is not enough to eliminate the sky, a suction port 21 with an appropriately sized opening is placed at the top. The suction gate 23 is opened and closed by the cylinder 22.

[0013] Therefore, when storing the asphalt mixture using the storage container body 1, it is usually If stored at around 60°C, store at a lower temperature, e.g. 100°C. Store nearby. When a request for shipping is received, the area around the material heating chamber 8 above the discharge port 2 is The microwave oscillator 11 attached to the enclosure is energized. 2450 from oscillator 11 A MHz microwave is emitted, and the microwave passes through the waveguide 12 and passes through the ceramic The material passes through the lid 10 made of aluminum and enters the material heating chamber 8. and inside the material heating chamber 8. When the asphalt mixture is irradiated with microwaves, the electromagnetic energy of the microwaves is is absorbed and converted into thermal energy, heating the asphalt mixture. This microwave heating heats the inside of the asphalt mixture in a short time. can do. The asphalt mixture in the material heating chamber 8 reaches a predetermined temperature. Then, the sealing plate 3a is lowered by the air cylinder 3, and the piston of the cylinder 4 is lowered. The stone rod 5 is contracted, the discharge gate 3 is moved back, and the discharge port 2 is opened. stop The asphalt mixture starts to be discharged from the discharge port 2, and the oscillator 11 starts discharging the asphalt mixture. The asphalt mixture passing through the material heating chamber 8 is heated and raised by irradiation with chroma waves. A predetermined amount of asphalt mixture is discharged while heating. reaching a predetermined release amount Then, the power to the oscillator 11 is stopped, and at the same time the microwave irradiation is finished, the cylinder is turned off. Operate the cylinder 4 and air cylinder 7 to advance the discharge gate 3 and seal it. The discharge port 2 is closed by raising the plate 3a.

[0014]

[Effect of the idea]

As explained above, according to the asphalt mixture storage container according to the present invention, storage A microwave transmitter 11 is installed on the outer periphery of the material heating chamber 8 above the outlet of the container body 1. This allows the asphalt mixture to be heated to the desired temperature in a short period of time during shipment. As a result, asphalt mixtures can be stored at lower temperatures compared to conventional methods, and progress of oxidative deterioration is prevented. Able to produce high-quality asphalt mixtures even when suppressed and stored for long periods of time .

[Brief explanation of drawings]

FIG. 1 is a partially vertical schematic front view showing an embodiment of the present invention.

FIG. 2 is a graph showing the relationship between the storage temperature of asphalt and the change in penetration level over time.

[Explanation of symbols]

1...Storage container body 2...Discharge port 8...Material heating chamber 9...Through hole 10... Lid body 11... Oscillator 12...Waveguide

Claims (1)

[Scope of utility model registration request] 1. An asphalt mixture storage container having an input port at the top and a discharge port at the bottom and having a heating and heat-retaining structure, wherein a material heating chamber is provided near the top of the discharge port, and a peripheral wall of the material heating chamber is provided. An asphalt mixture characterized in that a through hole of an appropriate size is bored in the asphalt mixture, the through hole is closed with a lid made of ceramic, and a microwave oscillator is attached to the lid through a waveguide. storage container.