JPH0694686B2 - High pressure washing car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a high-pressure washing vehicle used for cleaning sewer pipes, etc., and in particular, to separate sewage from pumped-up sludge water so that it can be reused as washing water. The present invention relates to an improvement of a filter in a recycling type high pressure washing vehicle.

[Conventional technology]

If a certain amount of sludge is deposited in the sewer pipe, cleaning is necessary to maintain its function. Currently, the most popular cleaning method for sewer pipes is a high-pressure washing vehicle equipped with a high-pressure water generator that generates high-pressure water, a water truck for supplying washing water to this high-pressure washing vehicle, and a sludge water tank. And a sludge suction car equipped with a vacuum pump etc. is dispatched to the work site, and the high-pressure water generated by the high-pressure water generator of the high-pressure washing car is supplied to the injection nozzle via the high-pressure hose. By injecting the high-pressure water, the sludge adhering and accumulating in the sewer pipe is separated and agitated, and the injection nozzle itself is propelled in the sewer pipe by using the injection reaction force, and the interior of the sewer pipe is automatically expanded. Cleaning, and by pulling back the jet nozzle in the direction opposite to the propelling direction while still jetting high-pressure water,
Sludge that has been separated and stirred is accumulated in a pit just below the manhole, and the sludge accumulated by a sludge suction car is pumped together with the wastewater to a sludge water tank and transported to a sludge treatment facility.

By the way, normally, since the cleaning work is performed by such means, when the water in the tank of the high-pressure washing vehicle runs out, it is necessary to interrupt the work and replenish the washing water. Therefore, in order to carry out continuous cleaning work, it is necessary to carry out the cleaning work with one set of three units: the high pressure washing car, the sludge suction car and the water supply car. It is necessary to prepare multiple cars and water trucks. In addition, since it is necessary to perform cleaning work using at least three vehicles, a high pressure washing car, a sludge suction car, and a water supply car, the work becomes bulky and costly. There were drawbacks such as hindrance.

Therefore, recently, a recycling-type high-pressure washing vehicle has been proposed, which is capable of separating sewage from pumped-up sludge water to be used again as washing water, and has been partially put into practical use. The schematic structure of this recycle type high pressure washing vehicle and its operation will be described below with reference to FIG. In FIG. 4, (1) is a wash water tank, (2) is a sludge water tank, and the inside of one tank (3) is partitioned by a partition wall (4) into a front and a back, and a front side. Is the washing water tank (1) and the rear side is the sludge water tank (2). The sludge water tank (2)
A suction hose (5) of an appropriate length, whose tip extends to a portion to be cleaned, for example, a pit directly below the manhole B of the sewer pipe A, and a vacuum pump (6) are connected. The vacuum pump (6) exhausts and decompresses the sludge water tank (2), and the negative pressure of the vacuum pump (6) can suck the sludge water in the cleaning target place through the suction hose (5) into the sludge water tank (2). . Also, sludge water tank (2)
A sludge pump (7) is connected to this, and the sludge water pump (7) sucks the waste water in the sludge water tank (2) through the pretreatment filter (8), and the waste water separator (9) to wash water tank. Transfer to (1). A tangential inflow cyclone is used for the sludge separator (9). In the tangential inflow cyclone, when sewage is sucked tangentially from the upper part of the cylinder at a predetermined speed, the sewage swirls along the inner wall surface to the lower part. Flow into the conical part of the washing water tank, where it gradually changes to an upward flow in the central part and exits from the upper discharge pipe (1)
While the solid matter such as fine sand contained in the wastewater swirls inside, it collides with the cylindrical wall surface due to the large centrifugal force and settles, and enters the sludge water tank (2). To fall. (10) is a washing hose reel mounted on the outer surface of the rear wall of the tank (3), and a high-pressure hose (12) having a high-pressure water jet nozzle (11) attached at its tip is wound so that it can be pulled out and wound up. ing. Washing hose reel (10)
A high pressure pump (13) is connected to the high pressure pump (1
The washing water suctioned from the washing water tank (1) through the filter (14) by 3) is pressurized and sent to the washing water hose reel (10) as high-pressure water, and is attached to the tip of the high-pressure hose (12). Jet from (11).

First, after introducing the suction hose (5) and the injection nozzle (11) into the pit just below the manhole B of the sewer pipe A, when the vacuum pump (6) and the high pressure pump (13) are driven, the high pressure pump (13) ), The washing water sucked from the washing water tank (1) through the filter (14) is sent to the washing hose reel (10) as high-pressure water, and is jetted from the jet nozzle (11) via the high-pressure hose (12). The high-pressure washing water separates and stirs the sludge adhering to and deposits in the sewer pipe A, and the jet nozzle (11) itself is propelled in the sewer pipe A by utilizing the jet reaction force to automatically feed the sewer pipe A. Of the spray nozzle (1
By pulling back 1) in the direction opposite to its propulsion direction,
The sludge that has been peeled off and stirred is accumulated in the pit just below the manhole B. At the same time, since the vacuum pump (6) is also being driven, the sludge water tank (2) is exhausted and decompressed, and the sludge accumulated in the pit directly below the manhole B passes through the suction hose (5) together with the sludge water and passes through the suction hose (5). It is sucked into the tank (2) and stored in the sludge water tank (2). In this way, when the sludge pump (7) is driven while continuously sucking the sludge water in the portion to be cleaned into the sludge water tank (2), only the sludge water sucked into the sludge water tank (1) is discharged. The waste water is pumped through the treatment filter (8) by the waste water pump (7) to the waste water separator (9), where the waste water and the solid matter are separated, and the waste water flows into the wash water tank (1) and is stored therein. The solid matter falls and is stored in the sludge water tank (2). The waste water thus stored in the sludge water tank (2) is sucked into the high-pressure pump (13) as washing water through the filter (14), pressurized by the high-pressure pump (13) and washed again as high-pressure water in the washing hose. Water is sent to the reel (10),
It is injected from the injection nozzle (11) through the high pressure hose (12). The above operation is repeated to pump up the sludge water in the portion to be cleaned into the sludge water tank (2).

[Problems to be Solved by the Invention]

By the way, as such a high-pressure pump (13) in such a recycling type high-pressure washing vehicle, a plunger pump that sucks in and pressurizes washing water by a reciprocating motion of the plunger and sends it out is often used. Due to the structure of this plunger pump, wear and damage of sliding parts have a great influence on the performance and life of the pump. Therefore, it is necessary to remove even fine solids with a filter (14). ) Causes clogging, making work impossible,
If the filtration area is increased, the size cannot be installed in a limited space such as a vehicle. Therefore, in order to eliminate clogging of the filter (14), a so-called backflow method is well known in which water or air is jetted from the opposite direction to blow off the solid matter clogging the filter (14). In the method, since it is necessary to stop the filtration work and perform backwashing, or to separately provide a device for backwashing, continuous work cannot be performed, or the entire device is large.

The present invention has been made in view of the above problems, and it is an object of the present invention to perform continuous work while preventing clogging of a filter, and also to be suitable for mounting in a limited space such as an axle. There is.

[Means for Solving the Problems]

In order to achieve the above object, the present invention partitions one tank into a front and rear airtight state, a front side of which is a wash water tank and a rear side of which is a sludge water tank, and the sludge water tank extends to an area to be cleaned. A suction hose, a vacuum pump that exhausts and decompresses the inside of the sludge water tank, and a wastewater pump that sucks the wastewater in the sludge water tank through a pretreatment filter and transfers it through the wastewater separator into the wash water tank. In addition to connecting, connect a high-pressure pump to the wash water tank to pressurize the wash water in the wash water tank and send it as high-pressure water to the hose reel of the high-pressure hose equipped with a high-pressure water injection nozzle attached to the rear end of the tank. In the above high-pressure washing vehicle, a cylindrical filter is provided in the washing water tank, and a guide vane that rotates along the inner surface of the filter is located near the inner surface of the filter. Only, in which took technical means of the tip end side of this guide vane with respect to the rotational direction is formed as the rear end side away from the inner surface of the filter close to the inner surface of the filter.

[Action]

When the guide blade is rotated inside the cylindrical filter by the above technical means, a part of the washing water inside the filter is pushed out to the outside of the filter due to the rotation of the guide blade, so that it adheres to the filter surface. Solids are stripped. Thereby, the filtration of the dirty water and the backwashing for preventing the clogging of the filter are simultaneously performed.

〔Example〕

The structure of the present invention will be described below with reference to an embodiment shown in FIGS. 1 and 2.

1 is a longitudinal sectional view of a main part of a high-pressure washing vehicle according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.
The same parts as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 1 and FIG. 2, (15) is a cylindrical filter support frame made of a perforated plate material such as a punching plate that forms a large number of small holes (15a) set to an arbitrary size. Wash water tank (1) on the inner surface of the front wall of 3)
A disk-shaped lid plate (16) is attached in a closed manner in the rear end opening portion. Reference numeral (17) is a cylindrical filter made of a metal mesh having a fine mesh that allows only the washing water to pass through without adversely affecting the high pressure pump (13), and is mounted on the outer circumference of the filter support frame (15) by surrounding it. is there. (18) is the tank (3) in the filter support frame (15)
The rotary shaft is rotatably supported on the front wall of the bearing via a bearing device (19), and is rotationally driven by an appropriate drive means (not shown). The rotary shaft (18) is provided with a support arm (21) so that (20) is located near the inner peripheral surface of the filter support frame (15).
Is a curved guide vane integrally attached to the filter support frame (15), the front end side (20a) is away from the inner peripheral surface of the filter support frame (15) in the rotational direction, and the rear end side (20b) is the filter support frame (15). ) Is curved so as to be close to the inner peripheral surface of the filter supporting frame (15), and a part of the washing water in the vicinity of the inner peripheral surface of the filter supporting frame (15) is rotated by the rotation of the rotating shaft (18) as shown by an arrow b. (15)
Through the small hole (15a) in the outer peripheral side of the filter (17). Reference numeral (22) is a connection port penetrating the front wall of the tank (3) so as to open in the filter support frame (15), and a hose (not shown) extending to the high pressure pump (13).
Are connected.

In the above configuration, the wash water tank (1) is supplied with the sewage water that has been treated in advance by the pretreatment filter (8) and the sewage separator (9). Then, the dirty water in the wash water tank (1) passes through the filter (17) by the high-pressure pump (13) as shown by an arrow a, and the small hole (15) of the filter support frame (15).
It flows into the filter support frame (15) from a) and is sucked by the high pressure pump (13) from the connection port (22). At this time,
Sewage is filtered by the filter (17), the filter (17)
Solids adhere to the surface of the. By the way, if the filter (17) is left as it is, it will be clogged due to the adhesion of solid matter, but by rotating the rotating shaft (18), the filter support frame (15)
By the guide vanes (20) rotating near the inner peripheral surface of
A part of the washing water near the inner peripheral surface of the filter support frame (15) is indicated by an arrow b, and the small hole (15
Backwashing is performed in which the solid matter that has been pushed out to the outer peripheral side of the filter (17) through a) and adhered to the surface of the filter (17) is peeled off. Moreover, this backwash is performed only near the guide vanes (20), and the filter (17)
In the other part, the filtration is performed. In this manner, since the filthy water can be filtered and the backwashing for preventing the filter (17) from being clogged at the same time, continuous work can be performed while preventing the filter (17) from being clogged.

The above shows one embodiment of the present invention, and the present invention is not limited to this embodiment and can be modified within the scope of the present invention. For example, in the embodiment, the guide vane (20) has a filter support frame (1
Although it is curved inward so as to separate from the inner peripheral surface of 5),
As shown in FIG. 3, the rear end side (20b) may be curved outward so as to be close to the inner peripheral surface of the filter support frame (20), and the front end side (20a) may be curved. Filter support frame (15)
The rear end side (20b) away from the inner peripheral surface of the filter support frame (1
It may be inclined so as to be close to the inner peripheral surface of 5).
Further, in the embodiment, the filter (17) which is attached to the outer periphery of the filter support frame (15) is used to filter the dirty water, but the cover plate (16) is made of a perforated plate material such as a punching plate. Then, another filter may be attached to the outside to filter the dirty water here. In this case, guide vanes are radially attached to the rear end of the rotary shaft (18) to simultaneously filter the dirty water and perform backwashing to prevent clogging of the filter.

〔The invention's effect〕

According to the present invention, since the filthy water can be filtered and the backwashing for preventing the filter from being clogged at the same time, continuous work can be performed while preventing the filter from being clogged. The number of parts of the mechanism for
Since it can be installed compactly in the tank, the weight, space, and
It is very effective with respect to dimensions and the like, and can exert remarkable effects such as great economic effects such as cost reduction and tank capacity increase.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a high-pressure washing vehicle according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a partial sectional view showing a modified example of the guide blade. FIG. 4 is a schematic configuration diagram of a recycling type high pressure washing vehicle. (1) …… wash water tank, (15) …… filter support frame, (16) …… cover plate, (17) …… filter, (18) …… rotating shaft, (20) …… guide vanes.

Claims (1)

[Claims] Claims: 1. One tank is divided into a front and a rear hermetically sealed manner, the front side of which is a wash water tank and the rear side of which is a sludge water tank.
A suction hose of an appropriate length that extends to the location to be cleaned in the sludge water tank, a vacuum pump that exhausts and decompresses the inside of the sludge water tank, and sucks the waste water in the sludge water tank through a pretreatment filter to pass through the waste water separator. High pressure with a high pressure water injection nozzle attached to the rear end of the tank as high pressure water by connecting the waste water pump for transferring into the wash water tank and pressurizing the wash water in the wash water tank to the wash water tank. In a high-pressure washing vehicle in which a high-pressure pump for supplying water to a hose reel of a hose is connected, a cylindrical filter is provided in the washing water tank, and a guide that rotates along the inner surface of the filter is located near the inner surface of the filter. A blade is provided, and the guide blade is formed such that the front end side is away from the inner surface of the filter and the rear end side is close to the inner surface of the filter with respect to the rotation direction. The high-pressure washing vehicle is characterized in that the washing water is filtered by the filter and the filter is backwashed as the guide vanes rotate.