JPH0647929Y2 - Asphalt solution spraying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for spraying an asphalt solution, which is sprayed as an adhesive between an asphalt mixture and a road surface prior to asphalt pavement on a road.

[Conventional technology]

Conventionally, as this type of spraying device, a pressure-type solution spraying device is generally known in which an asphalt solution stored in an asphalt solution storage tank is pressurized by an air compressor, and this is guided to a spray bar and sprayed from a nozzle. This device is used by mounting it on a self-propelled trolley or other appropriate trolley, or by being mounted on it.When effectively spraying the asphalt solution on the road, a spray bar is used near the road surface. The spray bar is usually located below the asphalt solution storage tank, as it is required to be located at.

When the spraying operation of the asphalt solution is interrupted or completed, the asphalt solution remains in the asphalt solution storage tank and the pipeline from the asphalt solution storage tank to the nozzle of the spray bar.

If left in this state, the asphalt solution may solidify, but in reality, the asphalt solution may be left as it is to solidify and then sprayed again with a burner, or by spraying. After completion of the procedure, connect the discharge hose to the asphalt melt storage tank and transfer the residual asphalt solution to the tank installed outside due to the difference between the pressure in the asphalt solution storage tank and the atmospheric pressure, and prepare for reuse. Storage measures are taken.

However, since the spray bar is located below the asphalt solution storage tank, it is not possible to heat and melt even the asphalt solution that remains firmly in the pipeline from the asphalt solution storage tank to the nozzle of the spray bar, and is also installed outside. It was also impossible to transfer it to the tank.

For this reason, the asphalt solution remaining in this part is currently discarded from the nozzle of the spray bar to the outside after the spraying work.However, asphalt solution is not only uneconomical, but also causes pollution. In addition, the disposal work was troublesome.

Therefore, the present invention solves the drawbacks of the conventional pressure type solution spraying device, and removes the asphalt solution remaining adhered to the pipeline from the asphalt solution storage tank to the spray bar nozzle.
It is an object of the present invention to provide an asphalt solution spraying device that can be easily returned to the asphalt solution storage tank.

[Problems to be solved by the device]

The problem to be solved is a spray bar after asphalt solution spraying in a conventional asphalt solution sprayer,
Also, it is difficult to treat the residual asphalt solution in the pipeline to the spray bar.

[Means for Solving the Problems]

The present invention relates to an asphalt solution storage tank 1, an air tank 5 for sending compressed air to the asphalt solution storage tank 1, a spray bar 2 for spraying an asphalt solution pressurized by compressed air, and an air tank 5 and a spray bar 2. In the pressure type asphalt solution spraying device consisting of the pipe line P ₁ which is connected or is shut off by the cock V ₆ , the asphalt solution storage tank 1 and the spray bar 2 are connected by the cock V _{9 and} are communicated by the cock V ₉ . Alternatively, the pipe line P ₂ that is blocked is provided.

[Action]

Thus, the pressure of the asphalt solution storage tank is usually set lower than the pressure of the air tank. For this reason, when the spray bar and the asphalt solution storage tank are communicated with each other, and at the same time when the spray bar and the air tank are communicated with each other, the pressure of the air tank acts on the spray bar, and the pressure difference generated between the spray bar and the asphalt solution storage tank causes the asphalt. The asphalt solution remaining in the conduit from the solution storage tank to the asphalt solution spray nozzle of the spray bar is returned to the asphalt solution storage tank.

〔Example〕

First, an example of a conventional asphalt solution spraying apparatus will be described with reference to FIG. 2 when describing an embodiment of the present invention with reference to the drawings. 1 is an asphalt solution storage tank, 2 is a spray bar, and 2a is An asphalt solution spray nozzle, 3 is an air compressor, 4 is a hydraulic motor for driving the air compressor 3, and 5 is an air tank provided on the exhaust port 3a side of the air compressor 3.

V ₁ is a four-way switching cock. By switching operation of the four-way switching cock V ₁ , the air tank 5 is sequentially regulated through the regulator V ₂ and the filter 6 to the intake port 3b of the air compressor 3 or the asphalt solution storage tank 1 , Is set so as to selectively communicate with any of the above.

At this time, the four-way switching cock V ₁ is operated to operate the air compressor 3
When the air intake port 3b of the vehicle and the asphalt solution storage tank 1 are communicated with each other, the air tank 5 is released to the atmosphere, and when the air tank 5 and the asphalt solution storage tank 1 are communicated with each other, air compression is performed. The intake port 3b of the aircraft 3 is opened to the atmosphere.

V ₃ is a relief valve for maintaining the pressure of the asphalt solution storage tank 1 at a predetermined value, and the air tank 5 is an asphalt via a two-way cock for air V ₄ , a check valve V ₅ , and a three-way cock for suction V _6. Solution storage tank 1 or spray bar 2
By switching between the two-way cock V ₄ for air and the three-way cock V ₆ for suction, it is set to selectively connect or disconnect.

V ₇ is a two-way cock for cleaning, V ₈ is a three-way cock for suction and discharge, and by switching these cocks, the asphalt solution storage tank 1, or the air tank 5 and the hose 7 for suction and discharge of asphalt solution, and a manual It is possible to communicate with the spraying device 8 or to shut off both simultaneously.

Reference numeral 9 is a burner for heating the asphalt solution, 10 is a light oil storage tank, and 11 is a hose for a sprayer.

Then, in order to apply the pressure necessary for spraying to the asphalt solution in the asphalt solution storage tank 1, it is natural that the pressure in the air tank 5 should be high. By using this asphalt solution spraying device, it is possible to perform suction, pressurization, spraying, and discharge of the asphalt solution to the asphalt solution storage tank 1 from the outside, and other work. The state of the cock is shown in the table as follows (however, the symbols relating to each cock are illustrated in the drawings).

An example of the pipeline when the cocks are switched according to this table will be described in which the asphalt solution storage tank 1 is depressurized and the asphalt solution is sucked from the outside.

First, when the four-way switching cock V ₁ is operated to connect the intake port 3b of the air compressor 3 and the asphalt solution storage tank 1 to each other, the exhaust port 3a of the air compressor 3 is automatically exposed to the atmosphere via the air tank 5. To be released.

Further, the cleaning two-way cock V ₇ is switched to shut off the asphalt solution storage tank 1 and the air tank 5, and the air compressor 3
When driving the, air asphalt solution storage tank 1 square switching cock V _1, through the filter 6 is sucked from the suction port 3b of air compressor 3, an air tank 5, through the regulator V _2, and the four-way switching cock V ₁ Are discharged into the atmosphere, and as a result, the asphalt solution storage tank 1 is depressurized to atmospheric pressure or less.

Under this condition, operating the intake / exhaust three-way cock V ₈ to connect the intake / exhaust hose to an external storage tank (not shown) causes the asphalt solution in the external storage tank to differ in atmospheric pressure from the asphalt solution. It is inhaled into the storage tank 1.

The description of the other various operations will be omitted because it is easy to understand the switching of the cocks shown in the table and the operation performed by the conduit formed thereby.

Next, an embodiment of the present invention will be described with reference to FIG. 1. The air tank 5 and the central portions 2b and 2c of the spray bar 2 are connected to each other by a pipe line P ₁ via a three-way cock V ₆ for suction. The asphalt solution storage tank 1 and both ends 2d and 2e of the spray bar 2 are connected to each other by a conduit P ₂ via a two-way reflux cock V ₉ or can be disconnected.

Then, in spraying the asphalt solution, the three-way cock V ₆ for suction is operated to connect the pipe line P ₁ connecting the asphalt solution storage tank 1 and the central portions 2b and 2c of the spray bar 2 with each other, and reflux. Operate the two-way cock V ₉ for the asphalt solution storage tank 1 and both ends 2 of the spray bar 2
The conduit P ₂ connecting the d and 2e is cut off, and the asphalt solution spraying nozzle 2a is opened.

Completion of the asphalt solution spraying work, or when interrupted, the asphalt solution spray nozzle 2a is closed, the central portion 2b of the air tank 5 and Supureba 2 by operating the suction three-way cock V _6, and 2c communicates with conduit P ₁ Also, the two-way cock V ₉ for reflux is operated to connect both end portions 2d and 2e of the asphalt solution storage tank 1 and the spray bar 2 through the pipe line P ₂ , and the air tank is connected to the central portions 2b and 2c of the spray bar 2. 5 is applied to make the pressure of the portion higher than that of the asphalt solution storage tank _1, and the residual asphalt in the pipe line P ₁ from the asphalt solution storage tank 1 to the asphalt solution spray nozzle 2a of the spray bar 2 due to the pressure difference between the two. The solution is refluxed to the asphalt solution storage tank 1.

In the embodiment shown in the drawings, the pipe line P ₁ for spraying the asphalt solution from the asphalt solution storage tank 1 is connected to the central portions 2b and 2c of the spray bar 2, but the connection is not limited to the central portion. It is also possible to employ a system in which the pipe line P ₁ is connected to one end of the spray bar 2 and the other end thereof is connected to the pipe line P ₂ which returns to the asphalt solution storage tank 1.

[Effect of device]

Since the present invention is configured as described above, when the asphalt solution spraying work is completed or interrupted, the asphalt solution remaining in the pipeline from the asphalt solution storage tank to the spray bar is removed by using the difference in air pressure. It is possible to quickly and surely return the gas to the storage tank, and it is possible to solve various problems in terms of pollution and economics caused by the disposal of the residual asphalt solution in the conventional asphalt solution spraying device.

In addition, the asphalt solution spraying device of the present invention can maintain all operating systems without contamination even when not in use after the completion of the asphalt solution spraying work, so there is little risk of damage to the device and long-term use. It is possible to achieve many effects.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention, and FIG. 2 is a schematic explanatory view showing a system of a conventional asphalt solution spraying device. 1 …… Asphalt solution storage tank 2 …… Spray bar 5 …… Air tank V ₆ …… Cock V ₉ …… Cock P ₁ …… Pipe line P ₂ …… Pipe line

Claims (1)

[Scope of utility model registration request] 1. An asphalt solution storage tank (1), an air tank (5) for sending compressed air to the asphalt solution storage tank (1), and a spray bar (2) for spraying the asphalt solution pressurized by the compressed air. , Connect the air tank (5) and the spray bar (2), and
In a pressure type asphalt solution spraying device consisting of a pipe line P ₁ which is connected or shut off by V ₆ , the asphalt solution storage tank (1) and the spray bar (2) are connected to each other, and a cock V ₉ connects them, Or pipe line P ₂ to be blocked
An asphalt solution spraying device.