JP2000074903A - Filter device for asphalt extraction testing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device for asphalt extraction testing machine, which is used to remove fine particulate smoke dust in a combustion gas generated from an asphalt extraction testing machine. SOLUTION: Filter bags 9 which have opening ends 10 at their lower ends are suspended inside the filter body 8. A partition plate 21 which supports the filter bags 9 and which partitions the body 8 into an upper chamber 22 and a lower chamber 23 is attached inside the body 8. The filter bags 9 are arranged in the upper chamber 22 at the body 8. A discharge port 25 is provided. The opening ends 10 at the filter bags 9 are arranged in the lower chamber 23 at the body 8. A connecting port 6 which is used to connect an evacuation conduit 2 at an asphalt extraction testing machine is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device for an asphalt extraction tester.

[0002]

2. Description of the Related Art Asphalt extraction test for determining the amount of asphalt contained by burning an asphalt mixture to determine whether or not the asphalt mixture used for road pavement contains the designed asphalt amount. The machine has an incinerator to burn the asphalt mixture,
The incinerator emits fine dust in combustion gas generated by combustion of the asphalt mixture together with the combustion gas into the atmosphere from an exhaust port.

[0003]

Since the asphalt extraction tester described above burns the asphalt mixture to perform the test, fine dust particles generated during the test are generated, and these dusts have a serious effect on environmental pollution. There are drawbacks to it.

An object of the present invention is to provide a filter device dedicated to an asphalt extraction tester, which can almost completely remove dust generated from the asphalt extraction tester.

[0005]

A filter device for an asphalt extraction tester according to the present invention suspends a filter bag having an open end at a lower end in a filter body, supports the filter bag, and lowers the body with an upper chamber and a lower chamber. A partition plate is installed in the main body, a filter bag is arranged in the upper chamber of the main body and a discharge port is provided, and an open end of the filter bag is arranged in the lower chamber of the main body, and the asphalt extraction tester is exhausted. It has a connection port for connecting a conduit.

[0006]

FIG. 1 shows a state in which an asphalt extraction tester 1 is connected to a filter device 3 of the present invention through an exhaust pipe 2, and the exhaust pipe 2 is incinerated with one end provided in the asphalt extraction tester 1. The other end is connected to a connection port 6 provided in the filter device 3 while being connected to the exhaust port 5 of the furnace 4.

As shown in FIGS. 2 and 3, the filter device 3 comprises a box-shaped filter body 8 having an opening / closing door 7 on its surface. The filter body 8 contains six filter bags 9 therein. Are arranged in two rows in a main body 8, and each filter bag 9 is made of heat-resistant nylon woven fabric, has a vertically long cylindrical shape having a conical upper portion, and has an opening at a lower end thereof. An end 10 is formed.

Each of the filter bags 9 is suspended from the hanger 12 attached to the bag suspension frame 11 into the main body 8, and the bag suspension frame 11 is pivotally connected to one end of a link plate 14 with a pin 13. Is pivotally attached to a link plate support piece 15 attached to the ceiling of the main body 8, and the bag suspension frame 1 to which the hanger 12 for suspending the filter bag 9 is attached.
1 is supported by a link plate 14 so as to be swingable about a pin 13.

A sealing rubber plug 17 having a through hole for inserting the operating rod 16 from the outside of the main body 8 into the inside of the main body 8 is attached to the side wall of the main body 8, and a gripping ball 18 is provided on the outer end of the operating rod 16.
A mounting member 19 is mounted on the inner end thereof, and the mounting member 19 of the operating rod 16 is pivotally attached to a swinging piece 20 provided on the bag suspension frame 11. Therefore, by moving the operating rod 16 to the left and right, the bag hanging frame 11 swings, whereby the filter bag 9 swings and fine dust and the like attached to the inside of the filter bag 9 can be washed away.

A partition plate 21 for supporting the filter bag 9 is mounted in the main body 8. The partition plate 21 has a circular hole having the same cross section as the cross section of the filter bag 9. Insert the filter bag 9
Is fixed to a partition plate 21, and the inside of the main body 8 is divided into an upper chamber 22 and a lower chamber 2.
It is divided into three. The upper chamber 22 of the main body 8 is provided with a filter bag 9 of a vertically long cylindrical shape having a conical upper portion, and a discharge port 25 for mounting a discharge pipe 24 communicating with the atmosphere.
In the lower chamber 23 of the main body 8, a connection port 6 for arranging the open end 10 of the filter bag 9 and connecting the exhaust pipe 2 of the asphalt extraction test machine 1 is formed.
Further, in the lower chamber 23 of the main body 8, a dust box 26 for accommodating fine dust is fixed at a lower end thereof so as to be removable by a lever fastener 27.

The filter device 3 of the present invention allows the combustion gas of the asphalt mixture from the incinerator 4 of the asphalt extraction test machine 1 to flow into the lower chamber 23 of the filter main body 8 and the combustion gas flowing into the lower chamber 23 to the open end. The filter 10 is put into a filter bag 9 made of a heat-resistant nylon cloth and filtered. Fine particulate dust adheres to the inner surface of the filter bag 9 by filtering the combustion gas.
The fine dust that is discharged to the atmosphere from the discharge port 25 through the outlet and adheres to the inner surface of the filter bag 9 is swung by operating the operating rod 16 to be shaken off the filter bag 9, and The dust contained in the dust box 26 provided at the lower end of the lower chamber 8 and collected in the dust box 26 is discharged from the lower chamber 26 to prevent the filter bag 9 from being clogged.

[0012]

As described above, the present invention has the above-mentioned structure, so that fine dust particles in the combustion gas of the asphalt mixture generated from the incinerator of the asphalt extraction tester can be almost completely removed, which may cause a problem of environmental pollution. Absent.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state in which a filter device of the present invention is connected to an asphalt extraction tester through an exhaust pipe.

FIG. 2 is a longitudinal sectional view of the filter device of the present invention.

FIG. 3 is a side view showing a part of the filter device of the present invention in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Asphalt extraction tester 2 Exhaust conduit 3 Filter device 4 Incinerator 5 Exhaust port 6 Connection port 7 Opening / closing door 8 Filter body 9 Filter bag 10 Open end 11 Bag suspension frame 12 Hanger 13 Pin 14 Link plate 15 Link plate support piece 16 Operation Rod 17 Sealed rubber stopper 18 Grip ball 19 Mounting member 20 Swinging piece 21 Partition plate 22 Upper chamber 23 Lower chamber 24 Discharge pipe 25 Discharge port 26 Dust box 27 Lever fastener

Claims (1)

[Claims] 1. A filter bag having an open end at a lower end is suspended in a filter main body, and a partition plate for supporting the filter bag and dividing the main body into an upper chamber and a lower chamber is mounted in the main body. Asphalt characterized by having a filter bag disposed in the chamber and a discharge port, and a lower port of the main body having an opening end of the filter bag and a connection port for connecting an exhaust pipe of an asphalt extraction tester. Filter device for extraction tester.