JP3453750B2 - Dust emission prevention device for cleaning car - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust discharge prevention device which is provided in an air exhaust portion of a suction blower of a cleaning vehicle and collects fine dust contained in exhaust gas discharged to the outside air.

[0002]

2. Description of the Related Art As a conventional dust discharge prevention device for a cleaning vehicle, JP-A-61-274003 and JP-A-2-854.
There is one disclosed in Japanese Patent Laid-Open No. 07. With these, dust collected from the lower part of the vehicle body is collected in the dust collection chamber, and fine dust that does not fall in the air flow inside the dust collection chamber is sucked by the suction blower by the filter (screen) provided between the dust collection chamber and the blower. Fine dust that is not filtered by the filter between the dust collection chamber and the blower is captured by the dust discharge prevention device installed in the air exhaust section that discharges the exhaust of the blower to the outside air, and the dust is separated from the exhaust and cleaned. It emits fresh air. As can be seen from the figure, a filter chamber is provided integrally with the cleaning vehicle as a dust discharge prevention device, and minute dust contained in the exhaust gas is captured by the filter in the filter chamber. In the above, the dust discharge prevention device includes the collected water with which the exhaust gas from the blower collides and contacts, the collected water storage tank for storing the collected water, and the exhaust passage. The exhaust containing the fine dust collides with the collected water, and the fine dust is captured by the water in the collected water and separated from the exhaust.

[0003]

When the dust discharge prevention device becomes dirty, the filter cannot be replaced because it is integrally fixed, and the dirt of the filter is vibrated and dropped. Although it can be done, there was a problem that the filter could not be completely cleaned by vibration. In addition, since the collected water is used for collecting dust, a tank for collecting the collected water is required, and a complicated shape is required for the exhaust gas to effectively collide with the collected water. However, there is a problem in that a replacement pipe for exchanging the dust collecting water must be provided and a space is required, and the entire apparatus becomes expensive. Further, there is also a problem that a large amount of fine dust directly reaches the exhaust port through the exhaust passage above the surface of the collected water, and the fine dust cannot be sufficiently removed.

[0004]

[Means for Solving the Problems] To solve the above problems,
In the present application, the dust discharge prevention device including the filter housing case and the filter housed in the case is detachably attached to the blower air exhaust portion of the suction blower, so that the filter of the dust discharge prevention device can be easily replaced and washed. I did it. Also, store the filter in the filter storage case.
With a lumpy unit filter set to a small amount
However, the amount of the filter housed in the filter housing case can be adjusted, and by increasing the amount of the filter, fine dust can be sufficiently removed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has at least a suction blower for causing a suction air flow to act in a dust collection chamber, and when discharging the exhaust air of the suction blower to the outside air from the blower exhaust unit,
In a dust discharge prevention device for a cleaning vehicle that collects fine dust contained in exhaust gas, the device includes a filter storage case that is detachably attached to a blower exhaust section and a filter stored in the case. As a result, the dust discharge prevention device can be easily attached to and removed from the blower air discharge part, and the filter can be easily cleaned.

The amount of the filter housed in the filter housing case can be adjusted. So the filter is
It is a block-shaped unit filter that is set smaller than the storage capacity of the filter storage case. The unit filter is made of a material having anticorrosion property, and the unit filter is, for example, stainless wool curling a stainless wire (wire mesh type filter). According to this, the filter is not corroded even if water is contained in the exhaust gas or dust, and it is preferable that the filter can be washed with water. In addition, since stainless wool is used, it is cheaper. By increasing the amount of stainless wool, the filter capacity is improved, and by adopting stainless wool for the filter, it also leads to noise reduction.

In order to make the dust discharge prevention device detachable, it is preferable that the dust discharge prevention device engages and fixes a clamp provided on the air discharge part to a hook provided on the filter housing case.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an outline of a known air flow cleaning vehicle (for example, Japanese Utility Model Laid-Open No. 5-16820) will be described with reference to FIGS. The blower casing 2 is attached to the open end of the centrifugal dust separator 1 fixed on the underframe 41 attached to the left and right vehicle frames 40.
And the impeller 3 of the suction blower 37 is rotatably supported by the outer plate 2a of the blower casing 2 via a bearing. The V-belt 7 is suspended around the V-pulley 4 wedged to the shaft of the impeller 3 and the V-pulley 6 attached to the output shaft of the engine 5, so that the impeller 3 is rotated at high speed. A blower exhaust part (exhaust pipe) 13 for exhausting the circulating air is continuously provided above the outer plate 2a of the blower casing 2. Blower casing 2
Is connected to the lower end of the pressure feed duct 8, and the lower end of the pressure feed duct 8 is connected to the pickup head 10. A suction duct 9 is connected above the pickup head 10 on the opposite side of the pressure feed duct 8, and the upper end of the suction duct 9 is attached to the front plate of a hopper (dust collection chamber) 11 that has an inclined surface. An outlet pipe 12 is attached to the inner wall of the front plate of the hopper 11 so as to communicate with the mouth. Therefore, the air flow generated by the high-speed rotation of the impeller 3 causes the pressure feed duct 8 and the pickup head 1 to move.
The dust that is circulated through the suction duct 9 and is swept up by the pickup head 10 is discharged from the blow-out pipe 12 into the hopper 11. In addition, 15 is a gutta room.

A dust discharge prevention device 14 for closing the opening of the air discharge part 13 is detachably attached to the air discharge part 13. As shown in FIGS. 1 to 3, the dust discharge prevention device 14 includes a filter housing case 16 and a filter 17 housed in the housing case 16. The filter housing case 16 includes front and rear walls 18 and 19, left and right side walls 20 and 21, and a bottom plate 2.
2 includes a case body 24 which is a box in which a filter storage chamber 23 is formed, and a lid 25 having a triangular prism shape. The case body 24 is formed by bending a plate material to form front and rear walls 18, 1.
9 and the left and right side walls 20 and 21 are formed, and an expanded metal is welded to this as a bottom plate 22 together with a plate 26 for mounting and reinforcing, and has a shape corresponding to the shape of the exhaust unit 13. A plurality of elongated holes 27 are formed in the front and rear walls 18, 19, and upper ends of the front and rear walls 18, 19 are bent outward to form a case body side mounting portion 28,
A central portion 28a of the case main body side mounting portion 28 is further bent downward, and a hook 29 having a J-shaped cross section is integrally welded. As shown in FIG. 2, the lid body 25 is formed by bending an approximately triangular frame body 30 onto which an upper plate 31 made of expanded metal corresponding to the shape of the frame body 30 is welded together with a mounting reinforcement plate 32. Side plates 33 having a plurality of holes 34 are attached to the left and right sides of the frame body 30. The front and rear frames 30a and 30b of the lid 25 are horizontally bent to form a lid-side mounting portion 35 that abuts the case-body-side mounting portion 28. The filter housing case 16 is constructed by abutting the respective mounting portions 28 and 35 of the lid 25 and the case body 24 and integrally fixing them with bolts.

The filter 17 housed in the filter housing case 16 is composed of a plurality of block-shaped unit filters 17a which are set to be smaller than the capacity of the filter housing case 16. The unit filter 17a is formed by curling a thread-shaped stainless wire having anticorrosion property (metal scourer-like one), and the unit filter 1
Reference numeral 7a has a three-dimensional filtration space that is finely and intricately intertwined with each other by overlapping fibers. Any unit filter may be used as long as it has corrosion resistance. The filter 17 is housed in the filter housing case 16 to configure a dust discharge prevention device 14. The dust discharge prevention device 14 includes a clamp 36 provided in the air discharge part 13 so as to close the opening of the air discharge part 13 and dust discharge. It is fixed by the hook 29 of the prevention device 13.

According to this structure, when the pickup head 10 is grounded and air is sent out from the pressure feeding duct 8, the air flows in the pickup head 10 from right to left in FIG. Is blown up and is collected in the hopper 11 through the suction duct 9 together with the suction airflow. Of the dust collected in the hopper 11, light and fine dust passes through a screen made of wire mesh or expanded metal stretched over the upper portion of the hopper 11 (not shown) and sucked into the dust separation device 1 by the circulating air. At this time, like a shower, an appropriate amount of water is sprinkled to give moisture to the dust, and the moisture causes the dust to be adsorbed to each other to form a large mass of dust.

The air sucked into the dust separation device 1 flows toward the blower 37 while rotating in a spiral shape by the high speed rotation of the impeller 3. At this time, the dust contained in the air surely adheres to the water film on the inner wall of the dust separation device 1 due to the centrifugal force that acts largely due to the increased mass,
Dust is removed from the circulating air. The circulating air after the dust is separated by the dust separating device 1 in this way is sucked into the blower 37 and is blown again to the pressure feeding duct 8 by the impeller 3. At this time, part of the circulating air is discharged as exhaust air through the dust discharge prevention device 14 of the air exhaust unit 13. The fine dust containing water that cannot be separated in the dust separation device 1 contained in the exhaust gas passes through the mesh or the long hole 27 of the bottom plate 22 of the dust discharge prevention device 14 attached to the air discharge part 13. The fibers of the filter 17 that are intricately intertwined with each other collide with and adhere to the fibers to be removed, and clean exhaust air is exhausted from the mesh and holes 34 of the upper plate 31 to the outside air. Further, noise is reduced by several dB (specifically, 2 to 3 dB) as compared with the case where the exhaust air is directly exhausted by exhausting it through the dust exhaust prevention device 14 at the opening of the air exhaust portion 13. If the filter 17 gets dirty, hook 2
Remove the clamp 36 from 9 and filter housing case 1
The filter 17 in 6 is taken out and washed. Or you may exchange. Although the dust discharge prevention device is attached to the wet type cleaning vehicle that gives water by the centrifugal dust separating device to collect the dust, it may be attached to the dry type cleaning vehicle. Further, since the filter housing case has a shape that matches the shape of the air exhaust portion and is attached to the opening of the air exhaust portion, it can be attached later even to a cleaning vehicle that does not have a dust emission prevention device. .

[0013]

As described above, in the present invention, since the fine dust contained in the exhaust is removed by the dust discharge prevention device, only the clean exhaust is discharged to the outside air, and the fine dust is not discharged. Also, since the filter has anticorrosive properties, the filter will not corrode even if the exhaust contains moisture, and the dust discharge prevention device is detachably installed in the blower exhaust part, When it becomes dirty, the dust discharge prevention device can be easily removed from the blower air discharge part to facilitate cleaning or replacement. Further, the structure is simple and inexpensive.

[Brief description of drawings]

FIG. 1 is a front view of a dust discharge prevention device.

FIG. 2 is a side view of the dust discharge prevention device.

FIG. 3 is a view showing how the dust discharge prevention device is attached to the air discharge part.

FIG. 4 is a side view of an air flow cleaning vehicle.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

11 Hoppers (garbage collection room) 13 Blower exhaust unit 14 Dust discharge prevention device 16 Filter storage case 17 filters 29 hooks 36 clamps 37 Suction blower

Claims (3)

(57) [Claims] 1. A cleaning vehicle having at least a dust blower for causing a suction airflow to act in a dust collection chamber, and collecting the fine dust contained in the exhaust air when the exhaust air of the suction blower is discharged from a blower exhaust portion to the outside air. In the dust discharge prevention device of
It consists of a filter housing case that is detachably attached to the blower air exhaust section and a filter housed in the case, and the filter corresponds to the capacity of the filter housing case.
Is a block-shaped unit filter set to
Adjust the amount of filters stored in the filter storage case.
A dust discharge prevention device for a cleaning vehicle , which can be saved. 2. The unit filter is a stainless wire.
Characterized by curled stainless wool
Sweeper dust discharge preventing apparatus according to claim 1, wherein that. 3. A dust discharge prevention device is a clasp provided in an air discharge part.
The hook on the filter housing case.
The dust discharge prevention device for a cleaning vehicle according to claim 1 or 2, which is fixed .