JPH07268807A - Asphalt automatic measuring and mixing device - Google Patents

Abstract

PURPOSE:To make it possible to measure the amount of asphalt and mix the asphalt with aggregates in an automatic mode. CONSTITUTION:This device 1 is provided with a mixing vessel 51, a melting tank 31, a melting means 3, a suction and discharge means 4 and a mixing means 5. The melting means 3 melts the asphalt housed in the melting tank 31 while the suction and discharge means 4 sucks up a specified amount of asphalt after it is melted in the melting tank 31 and discharges the asphalt to the mixing vessel 51. The mixing means 5 mixes the aggregates introduced into the mixing vessel 51 with the asphalt discharged from the suction and discharge means 4.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is applied to a pre-process of a specimen of an asphalt mixture to be subjected to various tests such as a compounding test and a mechanical test, and measures asphalt and the measured asphalt and aggregate. The present invention relates to an asphalt automatic weighing / mixing device for mixing.

[0002]

2. Description of the Related Art Conventionally, asphalt measurement and mixing with aggregate have been carried out as follows.

First, the measured aggregate is heated in an oven and then transferred to a wok.

On the other hand, asphalt is melted at a specified temperature. Next, a wok containing the aggregate is placed on a scale, and the dissolved asphalt is weighed into the wok. At this time, if you add extra asphalt, suck it with a piece of cloth and remove it.

Next, while the thermometer is put in the wok and the temperature is measured, it is heated with a gas stove until it reaches a specified temperature. When the temperature reaches the specified temperature, hold the pan with one hand and mix the asphalt and aggregate with the other hand using a spoon. During this time, the temperature is occasionally observed and adjusted so that the temperature is maintained at the specified temperature.

In this way, the asphalt is weighed and mixed with the aggregate.

[0007]

As described above, in the past, this was done entirely by hand, and the mixing required force. Since both the aggregate and the asphalt are melted and mixed at about 170 ° C., there is a problem that the work is difficult especially in summer.

Further, since the asphalt cannot be accurately measured, there is a problem that adjustment is required after the measurement and the working time becomes long.

Therefore, the present invention has been made in view of the above circumstances, and relates to an automatic asphalt metering and mixing apparatus for automating the measurement of asphalt and the mixing with the aggregate.

[0010]

In order to achieve the above object, an automatic asphalt metering and mixing apparatus of the present invention is an asphalt metering and mixing apparatus for measuring asphalt and mixing the measured asphalt and aggregate. A mixing container capable of containing asphalt and aggregate, a dissolution tank containing asphalt, a dissolution means for dissolving the asphalt contained in this dissolution tank, and a desired amount of the asphalt after dissolution in the dissolution tank is inhaled in a desired amount. And mixing means for discharging aggregate into the mixing vessel and asphalt discharged from the suction and discharging means.

[0011]

According to the automatic asphalt metering and mixing apparatus having the above-mentioned structure, the dissolving means dissolves the asphalt contained in the dissolving tank, and the suction and discharge means sucks a desired amount from the asphalt after dissolution in the dissolving tank. The mixture is discharged into the mixing container, and the mixing unit mixes the aggregate put in the mixing container with the asphalt discharged from the suction / discharge unit. This automates asphalt metering and mixing with aggregate.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the automatic asphalt metering and mixing apparatus of the present invention.

As shown in FIG. 1, this apparatus 1 has a dissolving means 3 for dissolving asphalt contained in a dissolving tank 31.
And a suction and discharge means 4 for sucking a desired amount of the asphalt after dissolution in the dissolution tank 31 and discharging it into the mixing container 51, an aggregate charged in the mixing container 51, and an asphalt discharged from the suction and discharge means 4. And a moving means 6 for moving the mixing container 51 and the dissolution tank 31, an operating means 7, and a control means (see FIG. 7) 8 for controlling each part of the apparatus 1. ing.

Next, the details of each of the above parts will be described.

The melting means 3 includes a frame 30, a melting tank 31 fixedly arranged on the frame 30 and containing asphalt, and a melting heater arranged outside the melting tank 31 (see FIG. 7). ) 32, a melting temperature sensor 33 (see FIG. 7) for detecting the temperature of the melting tank 31, and a melting temperature controller 34.
(See FIG. 7). The melting temperature controller 34 includes a setting switch for setting the heating temperature of the heater 32 and a temperature indicator 77a for displaying the temperature detected by the melting temperature sensor 33.
(See FIG. 6). The melting tank 31 is held at a set temperature (for example, 170 ± 10 ° C.) by heating the melting heater 32 under the control of the melting temperature controller 34.

As shown in FIG. 1, the intake / exhaust means 4 has a weighing section 40 for weighing asphalt, a weighing lifting section 41 such as an air cylinder for lifting the weighing section 40, and a weighing drive section. (See FIG. 7) 48.

As shown in FIG. 2, the measuring section 40 includes a cylindrical cylinder 42, a piston 43 arranged in the cylinder 42, and a piston such as a stepping motor for moving the piston 43 up and down via a rod 44. Drive unit 4
5, a metering heater 46 arranged outside the cylindrical portion 42a of the cylinder 42, a metering temperature sensor (see FIG. 7) 47 for detecting the temperature of the cylinder 42, and a metering temperature controller 48.

The suction / discharge means 4 is composed of a piston drive section 4
5 ascends and descends the piston 43 to inhale asphalt from the nozzle 42b into the cylinder 42,
The asphalt in the cylinder 42 is discharged from the nozzle 42b. The temperature controller 48 is a heater 46.
Heating temperature setting switch and weighing temperature sensor 47
A temperature indicator 77b (see FIG. 6) for displaying the temperature detected by. The cylinder 42 is kept at a set temperature (for example, 150 ± 10 ° C.) by heating the metering heater 46 under the control of the metering temperature controller 48. As shown in FIG. 3, the piston 43 is provided with a groove 43a along the circumferential direction, and a ring 43b is arranged in the groove 43a. The ring 43b has a contact ring 43c made of Teflon on the outside and an elastic ring 43d made of metal on the back side thereof. Tube 42
Adhesion ring 4 made of Teflon on the side that contacts the wall surface of a
By arranging 3c, the adhesiveness is improved, and by arranging the elastic ring 43d on the back side of the adhesive ring 43c, even if the elastic force of the adhesive ring 43c decreases at high temperature, the elastic ring 43d improves the adhesive performance. It is possible to perform, and it becomes possible to accurately measure a desired amount.

The mixing means 5 will be described with reference to FIG. FIG. 4 is a side view of the mixing means 5. The mixing means 5 is
As shown in the figure, as shown in FIG. 1, a frame body 50 movable in the left-right direction A, a mounting table 52 fixedly arranged on an inclined upper surface of the frame body 50, and mounted on the mounting table 52. Of the mixing container 51, a fixture 52a for fixing the mixing container 51 mounted on the mounting table 52 to the mounting table 52 side, a mixing heater 53 arranged outside the mixing container 51, and a mixing container 51 Mixing temperature sensor to detect temperature (see Figure 7)
54, a mixing temperature controller (see FIG. 7) 55, and a mixing unit 56.
A support part 57 for supporting the mixing part 56 so as to be movable in an oblique direction, a mixing elevating part 58 such as an air cylinder for elevating the mixing part 56, and a mixing drive part 59 (see FIG. 7). It has.

The frame body 50 of the mixing means 5 and the frame body 30 of the dissolving means 3 are connected to each other and integrated so that they can move along a slide rail 66 to be described later.

The mixing temperature controller 55 includes a setting switch for setting the heating temperature of the heater 53, and a temperature indicator 77c (see FIG. 6) for displaying the temperature detected by the mixing temperature sensor 54.

The mixing container 51 is kept at a set temperature (for example, 170 ± 10 ° C.) by heating the mixing heater 53 under the control of the mixing temperature controller 55.

The mixing section 56 includes a mixing blade 56a and a mixing blade 5
And a mixing motor 56b such as a geared motor for rotating 6a. The mixing blade 56a is the mixing container 5
It is eccentrically arranged on the lower side of 1. As a result, the mixed asphalt mixture can be homogenized.

The moving means 6 will be described with reference to FIG. FIG. 5 is a plan view of an essential part of the moving means 6. Means of transportation 6
Is a rack 6 that moves in the left-right direction A as shown in FIG.
A left-right moving motor 6 such as a linear motor having 0
1, a connecting member 62 that connects the tip of the rack 60 and the frame bodies 30 and 50, and a mixing position detection switch 63 that detects the mixing position (origin position) P ₀ by the pushing operation of the connecting member 62. A discharge position detection switch 64 for detecting the discharge position P ₁ by the pushing operation of the member 62.
A movement drive unit (see FIG. 7) 65 and a slide rail 66 for guiding the movement of the frame bodies 30, 50 in the left-right direction A.

The operating means 7 will be described with reference to FIG. FIG. 6 is a front view of the operation panel 70. The operating means 7 is
As shown in the figure, an operation panel 70 is provided, and the operation panel 70 is provided.
Includes a key 71 for the mixing means (mixer) 5, a key 72 for mode selection, a start key 73, a key 74 for the suction / discharge means (measuring machine) 4, a key 75 for the moving means 6, and various settings. Dial 76 to do
, A power-on key 78 for turning on the temperature controllers 34, 48, 55, a main switch 79a, a buzzer 79b for notifying the elapse of the set mixing time, and the operation of each part by pressing. An emergency stop button 79c for emergency stop is provided. This emergency stop button 79
c is restored by rotating in the direction shown by the arrow in the figure.

The keys 71 for the mixing means (mixer) 5 include a raising key 71a for raising the mixing section 56,
A lowering key 71b for lowering the mixing portion 56, a rotation key 71c for rotating the mixing blade 56a, and a stop key 71d for stopping the lifting operation are provided. The keys 72 related to mode selection are provided with an automatic mode selection key 72a for selecting an automatic mode and a manual mode selection key 72b for selecting a manual mode. Key 74 for suction / discharge means (measuring machine) 4
Includes a lift key 74a for lifting the weighing unit 40.
And a down key 74b for lowering the weighing unit 40,
An intake key 74c for inhaling and an ejection key 74d for ejecting are provided. The keys 75 related to the moving means 6 are provided with a right row key 75a for moving the frame bodies 30, 50 to the right side and a left row key 75b for moving the frame bodies 30, 50 to the left side. The dial 76 is provided with a dial 76a for setting the specific gravity of asphalt, a dial 76b for setting the weight of asphalt, and a dial 76c for setting the mixing time. Temperature controller 34,4
The power-on key 78 for turning on the melting temperature controller 34 and the power-on key for turning on the measuring temperature controller 48 include a power-on key 78a for turning on the melting temperature controller 34. 78b and a power-on key 78c for turning on the power of the mixing temperature controller 55 are provided. In addition,
In addition to the above, the operation panel 70 includes temperature controllers 34, 48, 55.
The temperature indicators 77a, 77b, 77c provided in the are also arranged.

FIG. 6 is a block diagram showing the control system of this embodiment.

The control means 8 comprises a CPU 80 for controlling each part of the apparatus 1 and a program memory 81 in which a control program as shown in FIG. 8 described later is stored. To the CPU 80, the metering elevating section 41 and the piston driving section 45 are connected via the metering driving section 48, the mixing elevating section 58 and the mixing motor 56b are connected via the mixing driving section 59, and the left and right moving motor 61 is driven to move. Connected via the section 65, and further, the dissolution temperature controller 34, the measurement temperature controller 48,
Mixing temperature controller 55, operating means 7, mixing position detection switch 6
3 and the discharge position detection switch 64 are connected.

Each of the temperature controllers 34, 48, 55 has a heater 32, 46, 53 and a temperature sensor 33, 47, 5 respectively.
4 is connected.

Next, the operation of this embodiment will be described with reference to the flow chart shown in FIG. 9 also with reference to FIG. It is assumed that the melting heater 32 and the mixing heater 53 have a temperature of 170 ° C., and the metering heater 46 has a temperature of 150 ° C. The set temperature of the metering heater 46 is set lower than that of the melting heater 32 and the mixing heater 53 in order to prevent leakage of asphalt from the melting tank 31 into the cylinder 42 due to thermal expansion. Is. Further, it is assumed that the dissolution tank 31 contains a predetermined amount of asphalt.

First, the operator operates the operation panel 70 of the operation means 7.
After operating the upper dials 76a, 76b, and 76c to set the specific gravity of asphalt, the weight of asphalt, and the mixing time, the main switch 79a is pressed to turn on the power to the apparatus 1, and the manual mode selection key 72b is pressed. Then, the manual mode is selected (S1). After a certain period of time has passed since the power was turned on, the temperatures of the melting tank 31 and the mixing vessel 51 are set to the melting heater 32 and the mixing heater 53 (about 1
70 ° C.), the temperature of the measuring unit 40 is measured by the measuring heater 4
The set temperature for 6 (about 150 ° C.) is reached. As a result, the asphalt contained in the dissolution tank 31 is sufficiently dissolved and each preparation is completed.

Next, the operator makes preparations (S2).

That is, the operator uses the up key 74 for the suction / discharge means (measuring machine) 4 and the mixing means (mixer) 5.
Press a and 71a. The CPU 80 uses the up key 74
The metering drive unit 48 and the mixing drive unit 59 are controlled based on the pressing of a and 71a, and the metering elevating / lowering unit 41 controls the metering drive unit 48.
The mixing unit 5 is driven by the mixing drive unit 59 while the metering unit 40 is lifted by driving the mixing unit 5.
Raise 6

Subsequently, the operator depresses the right row key 75a or the left row key 75b to move the frame bodies 30 and 50 to the origin position P ₀ as shown in FIG. The CPU 80 controls the movement drive unit 65 based on the depression of the right row key 75a or the left row key 75b, and the left-right movement motor 61 causes the movement drive section 6 to move.
By driving 5, the frame bodies 30 and 50 are moved to the right or left via the rack 60 and the connecting member 62. When the connecting member 62 pushes in the mixing position detection switch 63,
The mixed position detection switch 63 detects the origin position P ₀ ,
The detection signal is input to the CPU 80. CPU80 is
The movement drive unit 65 is controlled by the detection signal from the mixing position detection switch 63 to stop the driving by the left and right movement motor 61.

Next, the operator puts the preheated aggregate into the mixing container 51, mounts the mixing container 51 on the mounting table 52, and fixes the mixing container 51 to the mounting table 52 side by the fixture 52a. .

Next, the operator presses the automatic mode selection key 72a on the operation panel 70 to select the automatic mode (S
2) Press the start key 73 (S3).

When the start key 73 is pressed, the CPU 80
Reads the control program from the program memory 81 and executes asphalt weighing and asphalt / aggregate mixing.

The CPU 80 firstly determines the temperature controllers 34, 4
When a valid signal (a signal indicating that the set temperature has been reached) is received from 8, 55, it is confirmed that the melting tank 31, the cylinder 2 and the mixing container 51 are at the set temperature, and the asphalt is measured (S5). , S6, S7).

That is, the weighing elevating / lowering unit 41 has the CPU 80.
By driving the metering drive unit 48 based on the control of 1., the metering unit 40 is lowered until the nozzle 42b is immersed in the asphalt contained in the dissolution tank 31. Piston drive unit 45
In order to make the temperature of the melted asphalt in the melting tank 31 uniform and to remove air bubbles from the melted asphalt, the piston 43 is moved up and down twice through the rod 44 by the driving of the metering drive unit 48. After being moved and sucked and discharged twice, the piston 43 is pulled up to a position corresponding to a desired amount of asphalt for the third time. As a result, a desired amount of asphalt is sucked into the cylinder 42 from the nozzle 42a (S5). The amount of movement of the piston 43 is obtained from the specific gravity and asphalt amount set by the CPU 80 and the diameter of the cylinder 42. Further, by inputting a necessary pulse signal to the piston drive unit 45,
Accurate movement of the piston 43 can be performed. next,
The weighing lifting / lowering unit 41 raises the weighing unit 40 by driving the weighing driving unit 48. Then, the piston drive unit 45
Drives the metering drive unit 48 to pull up the piston 43 by about 1 mm. As a result, it is possible to prevent the asphalt from dripping when the frames 30 and 50 move in the left-right direction A.

Next, the CPU 80 moves the frame bodies 30 and 50 to the discharge position P ₁ as shown in FIG. 8 (S6).
FIG. 8 is a perspective view of the asphalt automatic weighing and mixing apparatus 1 at the discharge position P ₁ .

That is, the left and right moving motor 61 is the CPU
By driving the movement drive unit 65 based on the control of 80, the frames 30 and 50 are moved to the right through the rack 60 and the connecting member 62. When the connecting member 62 pushes the discharge position detection switch 64, the discharge position detection switch 64 detects the discharge position P ₁ and inputs the detection signal to the CPU 80. The CPU 80 controls the movement drive unit 65 by the detection signal from the discharge position detection switch 64 to stop the drive by the left and right movement motor 61. Piston drive 4
5 drives the metering drive unit 48 under the control of the CPU 80 to push down the piston 43 via the rod 44 and discharge the asphalt in the cylinder 42 from the nozzle 42a into the mixing container 51 (S7). Subsequently, in order to completely discharge the asphalt in the cylinder 42, two suctions are performed,
Discharge.

Next, the CPU 80 moves the frames 30 and 50 to the mixing position P ₀ as shown in FIG. 1 (S8).

That is, the left and right moving motor 61 is the CPU
By driving the movement drive unit 65 based on the control of 80, the frames 30 and 50 are moved leftward via the rack 60 and the connecting member 62. When the connecting member 62 pushes the mixing position detecting switch 63, the mixing position detecting switch 63 detects the mixing position P ₀ and inputs the detection signal to the CPU 80. The CPU 80 controls the movement drive unit 65 by the detection signal from the mixing position detection switch 63 to stop the driving by the left and right movement motor 61.

Next, the mixing elevating section 58 is driven by the mixing driving section 59 under the control of the CPU 80, and the mixing blade 56 is driven.
The drive unit 56 is lowered until a enters the mixing container 51. The mixing motor 56b drives the mixing drive unit 59 to rotate the mixing blade 56a to mix the asphalt and the aggregate (S9). The CPU 80 stops the mixing at the mixing time set by the operation means 7 and sounds the buzzer 79b to notify the operator that the mixing is completed. The mixing elevating unit 58 drives the mixing / combining driving unit 59 under the control of the CPU 80 to raise the driving unit 56.

Next, the operator releases the fixing by the fixing tool 52a and takes out the mixing container 51 from the mounting table 52 (S
10).

The asphalt mixture in the mixing container 51 taken out is then subjected to various tests such as a compounding test and a mechanical test as a sample through a process such as compaction.

According to this embodiment as described above, the asphalt is measured by the suction / discharge means 4, and the asphalt and the aggregate are mixed by the mixing means 5.
It is possible to automate the measurement of asphalt and the mixing with the aggregate, and it is possible to reduce the burden on the operator and to improve the working environment because it is relieved from manual work. Further, since the asphalt can be accurately measured, no adjustment is required after the measurement, and the uniformity of the specimen can be improved by the temperature control during the measurement and mixing, and the working time can be shortened.

The present invention is not limited to the above embodiment,
Various modifications can be made without changing the gist of the invention.

[0050]

According to the present invention described in detail above, since the asphalt is measured by the intake / discharge means and the asphalt and the aggregate are mixed by the mixing means, the asphalt is measured and the aggregate is mixed. It is possible to provide an automatic asphalt metering / mixing device that aims to automate mixing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an automatic asphalt metering and mixing apparatus of the present invention.

FIG. 2 is a cross-sectional view of a main part of a measuring unit of an intake / exhaust unit.

FIG. 3 is a cross-sectional view for explaining a piston seal structure.

FIG. 4 is a side view of the mixing means.

FIG. 5 is a plan view of a main part of the moving means.

FIG. 6 is a front view of the operation panel

FIG. 7 is a block diagram showing a control system of this embodiment.

FIG. 8 is a perspective view of the automatic asphalt metering and mixing apparatus in a discharge position.

FIG. 9 is a flowchart for explaining the operation of this embodiment.

[Explanation of symbols]

 1 Asphalt Automatic Measuring and Mixing Device 3 Dissolving Means 4 Inhalation Discharging Means 5 Mixing Means 31 Dissolving Tanks 51 Mixing Containers

Claims (1)

[Claims] 1. An automatic asphalt metering and mixing apparatus for measuring asphalt and mixing the measured asphalt with the aggregate, a mixing container capable of containing the asphalt and the aggregate, and a dissolution tank containing the asphalt, Dissolution means for dissolving the asphalt contained in the dissolution tank, suction and discharge means for inhaling a desired amount from the asphalt after dissolution in the dissolution tank and discharging it into the mixing container, and bone introduced into the mixing container An asphalt automatic metering and mixing apparatus comprising: a mixing unit configured to mix the material and the asphalt discharged from the suction / discharge unit.