JP3447695B2 - Cooling water filtration and circulation device for road surface cutting machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention filters turbid water containing sludge such as earth and sand or concrete powder having small particles, discharges the separated sludge into a container, and stores the separated water in a fresh water tank. The present invention relates to a cooling water filtering and circulating device for a road surface cutting machine, which is configured to be reusable.

[0002]

2. Description of the Related Art In a civil engineering work, a concrete structure may be cut or pierced, but in this case, in order to prevent dust from scattering in the air, water is sprayed on the cutting site or the piercing site. Is done. Since a large amount of sludge made of concrete powder is contained in the sprinkled water, if left at the construction site, the sludge will be dried and scattered on the fine powder, which is not preferable in terms of environmental hygiene. Therefore, water containing sludge is being collected.

As a technique for collecting and treating muddy water containing sludge as described above, for example, Japanese Patent Laid-Open No. 11-10721.
There is "Road grooving cooling water recovery treatment water supply device" disclosed in No. 2. This technology lays a recovery device on a cutting machine that cuts the paved surface of the road, sucks cooling water that sulfides into muddy water on the road surface by using this recovery device by using vacuum pressure, A vacuum recovery tank that removes pebbles and gravel in the recovered water, a multi-stage rapid settling filter tank that dissolves a flocculant in mud water for rapid precipitation, a filter press that pumps filtered water to separate it into sludge metropolitan water, and collects filtered water It is equipped with a filtrate tank and a fresh water tank that circulates cooling water.

In the above technique, a vacuum pump is provided in the vacuum recovery tank, and a water supply pump is provided in each of the filtrate tank and the fresh water tank between the vacuum recovery tank and the multi-stage rapid settling filtration tank. By driving the pump, a series of operations from the collection of cooling water to the circulation of fresh water stored in the fresh water tank can be performed. Therefore, the cooling water can be efficiently circulated and reused, and the work can be continuously performed for a long time.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the technology of No. 7212, a pump is arranged for each tank and tank constituting the recovery treatment water supply device, and a pressure pump is also arranged for the filter press, so that the cooling water is continuously operated from recovery to reuse. You can However, the amount of water used for cutting the road is not so large, and the cutting itself is not performed continuously for a long time. That is, this technique has a problem in that the number of pumps increases and the size of the entire apparatus increases accordingly.

Therefore, in order to mount such a large-scale device on a truck or the like, a truck having a load capacity equivalent to that is required, or the loaded weight is exceeded and the load regulation is violated. There was a case where it hindered the transportation work of the device.

An object of the present invention is to provide a compact cooling water filter circulating device for a road surface cutting machine, which can efficiently filter muddy water discharged from the road surface cutting machine and circulate and reuse the water separated from the muddy water. To provide.

[0008]

In order to solve the above-mentioned problems, in a cooling water filtering and circulating apparatus for a road surface cutting machine according to the present invention,
A pump for sucking and pumping turbid water containing sludge through the turbid water suction path, and a filtration processing unit for pressure-filtering turbid water by the turbid water pumped from the pump to separate sludge and water, It is composed of a filtration treatment tank forming a retention part of water separated by the filtration treatment part and a fresh water tank provided so as to be able to communicate with the retention part, and the filtration treatment part is hermetically opened on the pumping side of the pump. The turbid water suction path is connected to the suction side of the pump by selectively connecting either one of the turbid water pressure feed path leading to the turbid water supply port provided in the lid body and the sludge discharge path leading to the sludge container. And a sludge suction path leading to a sludge discharge port provided at the bottom of the filtration processing section are selectively connected, and fresh water delivery provided in the fresh water tank The one in which to connect the cooling water supply pipe leading to the road milling machine is constructed.

That is, when a road is cut by a road surface cutting machine (hereinafter referred to as a road cutter), muddy water containing sludge discharged from the road cutter is pressure-fed to a filtration treatment section of a filtration treatment tank to be added. Water that has been pressure-filtered and solid-liquid separated by the pressure of turbid water that has been sent to the filtration unit is retained in the retention section of the filtration tank, and cooling water is supplied from the fresh water tank that is connected to the retention section. Cooling water is supplied to the load cutter via the supply route and is used in a circulating manner. Further, the sludge discharge work is performed so that the sludge separated by the pressure of the muddy water in the filtration processing section is stored in the container through the sludge discharge path. In this way, two step operations are carried out: reuse of the water dispersed by the filtration operation of turbid water and discharge of sludge. That is, in the filtration processing section, the water separated into solid and liquid by pressurization by the discharge pressure of one pump stays in the retention section and is sent to the load cutter through the fresh water tank communicating with the retention section, while the solid-liquid separation is performed. The sludge that has been separated and accumulated in the filtration processing unit can be discharged from the sludge discharge port provided at the bottom of the filtration processing unit, so the entire device can be made compact and violating the overloading regulations even when mounted on a truck. It is possible to carry out rational work such as being able to carry it into the construction site without it.

By providing a plurality of filtration treatment parts in the filtration treatment tank, the filtration treatment capacity can be improved.

Since the fresh water tank is provided integrally with the filtration tank, the entire apparatus can be made compact.

Since the water in the stagnant portion can be forcibly discharged on the suction side of the pump, the setup work can be speeded up.

By the synergistic filtration action of the filtration member and the sludge filtration membrane in the filtration processing unit configured to be capable of being closed and pressurized, the solid-liquid separation ability of muddy water can be improved, and sludge with a fine particle size can be collected.

Since the retention portion is formed over the inner peripheral side surface and the bottom surface of the filtration treatment tank, efficient solid-liquid separation having a filtration area can be performed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the cooling water filtering and circulating apparatus for a road surface cutting machine of the present invention will be described below with reference to the drawings. FIG. 1 is a pipe system diagram of a cooling water filter / circulator A for a road surface cutting machine according to the present invention, and FIG. 2 is a partially enlarged view of a filter member shown in a portion B in FIG.

A cooling water filter / circulator A for a road surface cutting machine (hereinafter referred to as a filter / circulator) A according to the present invention is pumped by a single pump forming a pump. The work of pressurizing and filtering the turbid water TW containing the sludge S in the filtration processing unit 3 of the filtration processing tank 2, the work of sucking the sludge S separated by the filtration processing unit 3 by the pump 1 and discharging it to the outside, the filtration processing unit The water W separated and retained in the retention section 2a and transferred to the fresh water tank 4 is reused or discharged, and the like.
The fresh water tank 4 communicating with the filtration processing unit is replaced with the filtration processing tank 2
The filter processing apparatus A can be downsized by being integrally provided in the filter processing apparatus A.

The sludge S which can be processed by the filtration processing apparatus A is cutting powder such as concrete or asphalt generated when the paved road is cut by the road cutter 5,
It may also include sludge generated when cleaning the sewer, concrete powder generated when cleaning the concrete mixer or the concrete placing device, and the like.

In this embodiment, muddy water TW containing sludge S generated when the road is cut by the road cutter 5
It is configured as a filtration circulation device A that treats the above, so that even if the filtration circulation device A is mounted on a truck with a loading capacity of 2 tons, it can be mounted on the truck without violating the overload regulation and moved to the target construction site. It is configured.

The pump 1, the filtration treatment tank 2, the filtration treatment unit 3, the fresh water tank 4 and the container 8 are organically connected to each other by a plurality of pipe systems centering on the pump 1, and the respective pipe systems are joined together. The part is provided with a switching valve. Then, the switching valve is selectively operated to select the pipe system, and the pump 1 is driven to perform the intended work.

First, the tubing system for connecting the respective devices will be described with reference to FIG.

The load cutter 5 made of concrete or the like, which is the source of the turbid water TW containing the sludge S, has a cooling water supply pipe 9 connected to the fresh water tank 4 and a cooling water supply hose 1.
0 is connected, and when the load cutter 5 is operating, the valve V6 is opened to continuously supply cooling water from the fresh water tank 4 to cool the blade portion when cutting the pavement,
Prevents the generated fine powder from scattering.

A hose reel (not shown) is connected to the load cutter 5, and muddy water TW containing sludge S around the blade is sucked by a pump (not shown) provided around the blade to store the tank. 11 can be supplied.

A muddy water suction pipe 12 is connected between the storage tank 11 and the suction port 1a of the pump 1, and the muddy water suction pipe 12 is connected to the sludge discharge port 21C in the filtration processing section 3 of the filtration tank 2. Sludge suction pipe 13
It is connected. Therefore, the sludge discharge ports 21C provided in the filtration processing unit 3 are connected to the suction ports 1a of the pump 1 via the sludge suction pipes 13, respectively.

The muddy water suction pipe 12 is provided with a valve V3 for shutting off or opening the flow of the pipe 12, and the sludge suction pipe 13 is provided with a valve V7 for shutting off or opening the flow of the pipe 13. There is. Therefore, by selectively operating the valves V3, V7, it is possible to select the pipe to be operated from the suction pipes 12, 13 connected to the suction port 1a of the pump 1.

Discharge port 1b of pump 1 and filtration treatment tank 2
21d in the filtration processing unit 3 of the above is the muddy water pressure-feeding pipe 1
4, the sludge discharge pipe 15 connected to the container 8 is branched from the muddy water pressure supply pipe 14. Therefore, the container 8 is connected to the discharge port 1 b of the pump 1 via the sludge discharge pipe 15 and the muddy water pressure supply pipe 14.

A valve V4 is arranged in the muddy water pressure-feeding pipe 14 at the joint with the sludge discharge pipe 15, and a valve V8 is arranged in the sludge discharge pipe 15. Therefore, by selectively operating the valve V4, it is possible to select the discharge pipe to be operated from among the discharge pipes 14 and 15. Further, the sludge S can be discharged into the container 8 by operating the valve V8 arranged in the sludge discharge pipe 15.

Further, the water retention portion 2a of the filtration treatment tank 2
Are connected to the fresh water tank 4 in communication with each other. The fresh water tank 4 has a water supply port 9a used when the water W is reused as cooling water and a water supply port 9a used when the water W is discharged without being reused. A water outlet 9b is provided. The water supply port 9a
Is connected to a hose holder 16 to which a cooling water supply hose 10 is attached via a cooling water supply pipe 9, and a water outlet 9b is connected to a hose holder 18 to which a drainage hose is attached via a water discharge pipe 17 and a valve V5. Connected.

Further, when the water W containing the sludge S is pressure-fed to the filtration treatment section 3 of the filtration treatment tank 2 for pressure filtration, it is necessary that the inside of the filtration treatment tank 3 is filled with water. Valves V1 are attached to the valve 4, and these valves V1 are connected to a faucet such as tap water or a water supply source (not shown).

The pump 1 is provided with turbid water T containing sludge S.
It has a function of sucking W, separated sludge S, and the like, and discharging the sludge through the respective intended pipes, and it is also possible to use a dual rotary tube pump.

Here, the rotary tube pump is a pump which has a strong suction force and a strong pressure feeding capability and is capable of self-priming and pressure feeding at the same time. In principle, two extrusion rollers
It rolls and slides along the special rubber tube, and the tube restoring force and the guide rollers on both sides forcibly restore it to generate a strong vacuum suction force, which sucks the liquid and sends it out in the rotation direction of the extrusion roller. .

By using such a rotary tube pump, it is possible to supply the turbid water TW containing the sucked sludge to the filtration treatment section under high pressure, and the turbid water TW is separated into solid and liquid by the two filtration treatment sections. Since the sludge is reused and the sludge is discharged, the filtration capacity can be maintained high even if the filtration tank is made compact.

When a double rotary tube pump is used, a plurality of muddy water pressure supply pipes are arranged on the discharge side of the pump, and a plurality of sludge suction pipes are arranged on the suction side of the pump.

The filtration tank 2 is, as shown in FIG.
A filtration processing unit 3 including a tank main body 21a having a flat bottom and a cylindrical or rectangular tube shape, and a lid 21b for opening or sealing the upper portion of the main body 21a, and a vertical direction inside the filtration processing unit 3. The filter member 22 is disposed and has a tubular shape. When the filtration member 22 is arranged in the filtration processing unit 3, the sludge S accumulation portion 23 is formed inside the filtration member 22, and the water W retention portion 2a is formed between the filtration member 22 and the tank body 21a. To be done.

The lid 21b is provided with a safety adjusting valve V9 so that the pressure in the filtration processing unit 3 does not exceed the specified pressure.

Further, the separated sludge S is formed on the flat bottom of the tank body 21a which is the lower end of the sludge accumulation section 23.
Is formed, and the sludge discharge port 21c is connected to the sludge suction pipe 13. Further, the tank main body 21a on the upper and lower side surfaces of the retention portion 2a has communication pipes 21d, 2 which communicate with the fresh water tank 4.
1e is connected, and the fresh water tank 7 is integrally connected to the filtration treatment tank 2 via the communication pipes 21d and 21e.

An overflow valve V2 is provided on the upper side surface of the tank body 21a to adjust the water level in the retention section 2a.

As shown in the enlarged view of portion B in FIG. 1, the filter member 22 is composed of a filter material 22a, which is a single layer or a plurality of layers, and a support material 22c which supports the filter material 22a. There is. The filter material 22a is made of non-woven fabric having fine pores, filter paper, filter cloth, synthetic resin, or the like,
It has a function of pressurizing and separating the sludge S and the water W from the turbid water TW containing the sludge S that has been pressure-fed. The conditions such as the material of the filtering material 22a and the mesh are appropriately set in consideration of the particle diameter of the sludge S.

The support material 22c is water W containing sludge S.
Formed by using a material, for example, a punching metal, which is capable of sufficiently counteracting the pressure applied when the water is pumped and is pressurized and which allows the separated water W to easily pass through the retention portion 2a. Has been done. Therefore, when the water W containing the sludge S is pumped and pressurized by the pump 1 to the filtration processing unit 3, the pressure acting on the filter material 22a can be supported by the support material 22 to separate the sludge S and the water W. It is possible.

The storage tank 11 contains turbid water TW containing sludge S generated by cutting concrete, for example.
Is temporarily stored. The storage tank 11 prevents air from entering and idle rotation of the pump when the pump 1 sucks and supplies muddy water.

Further, the fresh water tank 4 is supplied with the water W separated in the filtration treatment tank 2 in order to supply fresh water as cooling water to the blade portion of the load cutter while the load cutter 5 is cutting the concrete. . A level gauge 30 is provided on the side surface of the fresh water tank 4.

Further, the container 8 receives the sludge S separated in the filtration processing section 3 of the filtration processing tank 2, and does not limit the structure.

The operation procedure of the filtration circulation device A configured as described above will be described. When starting the filtration process,
As shown in FIG. 1, in the initial state, the valve V1 is opened to the fresh water tank 4 to supply the water W from a water supply source not disclosed such as water supply. In this case, the lid 21b of the filtration processing unit 21 is closed, the valves V9 and V2 are opened, and the valve V1 is opened while the filtration processing unit 21 is in communication with the atmosphere, so that the filtration processing unit 21 stays inside the filtration processing unit 21. The water W is filled through the portion 2a.
When the water W leaks from the valve V2, the level gauge 30 is visually checked, and it is determined that sufficient water W has been supplied to the inside of the filtration processing unit 21 and the valves V1, V2, and V9 are closed to establish continuity between the inside and the atmosphere. Cut off.

When the load cutter 5 is operated while supplying the cooling water to the load cutter 5 from the fresh water tank 7 through the cooling water supply pipe 9 and the cooling water supply hose 10, the sludge S generated by the cutting is included. The muddy water TW is supplied to the storage tank 11 via the hose 4a. And storage tank 1
When the water level of No. 1 reaches a preset level, the work of separating the sludge S and the water W by pumping the turbid water TW containing the sludge S to the filtration processing unit 3 is started.

When the sludge S and the water W are separated from the turbid water TW, as shown in FIG. 1, the valve V3 on the suction port 1a side of the pump 1 is opened and V7 is closed to operate the turbid water suction pipe 1 as shown in FIG.
2 is conducted and the sludge suction pipe 13 is shut off.
Further, the valve V4 on the discharge port 1b side of the pump 1 is opened to V8.
Is closed, and the muddy water pressure supply pipe 14 is made conductive and the sludge discharge pipe 15 is cut off.

After the valves V3, V4 and V7 are operated in the above-mentioned state, the pump 1 is driven, and the turbid water TW stored in the storage tank 11 passes through the turbid water suction pipe 12, the pump 1 and the turbid water pressure feeding pipe 14. It is sent under pressure to the filtration processing unit 3. The muddy water TW is pressure-supplied from the lid 21b into the inside of the filtration processing unit 3, and is separated into sludge S and water W by the pressure of the muddy water TW and the filtering member 22. The sludge S separated by the filter member 22 is deposited in the form of a film on the filtration processing unit 3 as a deposition unit 23, and the separated water W is supplied to the fresh water tank 4 from the retention unit 2a through the communication pipes 21d and 21e. It

When the work of separating the sludge S and the water W from the turbid water TW progresses and the water level of the storage tank 11 drops, the pump 1 stops and the work of separating the sludge S and the water W stops.

When the amount of sludge S accumulated in the filtration processing unit 3 becomes large, a sludge discharging operation for sucking the sludge S and discharging it into the container 8 is performed. In this state, the sludge S and the water W are mixed inside the filtration processing unit 3.

The sludge S in the filtration processing unit 3 is deposited in a film shape along the inner wall surface and the bottom surface of the filtering material 22a, and the surface is covered with the sludge S having a fine particle size. Therefore, when the pressing force of the turbid water TW is applied to the sludge S deposition portion 23, a force that pushes the deposited sludge S downward acts.

As shown in FIG. 1, this work is connected to the hose plug 25 by opening the valve V10 connected through the drainage pipe 24 provided in the lower portion of the retention portion 2a of the filtration treatment tank 2. At the same time that the water W is discharged by a hose (not shown), the sludge S is discharged.

The valves V3, V4 and V7 are shut off,
By opening the valves V8 and V11, the water W in the retention portion 2a is forcibly vacuum-sucked from the drainage pipe 24 through the sludge suction pipe 13 on the suction side of the pump 1 and sent to the sludge discharge pipe 15 and discharged. It is also possible to do so.

In this work, as shown in FIG. 1, on the side of the suction port 1a of the pump 1, the valve V3 is closed and V7 is opened to make the sludge suction pipe 13 conductive and cut off the muddy water suction pipe 12. . On the side of the discharge port 1b of the pump 1, the valve V4 is operated to make the sludge discharge pipe 15 conductive, shut off the muddy water pressure supply pipe 14, and open the valve V8.

In the filtration processing unit 3, the valve V9 is opened to connect the inside of the filtration processing unit 3 to the atmosphere.

When the pump 1 is driven in the above state, the suction force of the pump 1 sucks the sludge S accumulated in the accumulation section 23 of the filtration processing section 3, and the sludge suction pipe 1
3, it is discharged into the container 8 through the pump 1, the sludge discharge pipe 15, and the valve 8. At this time, since the inside of the filtration processing unit 3 is at atmospheric pressure, the sludge S is generated as the pump 1 operates.
Is easily discharged.

After discharging the water W and the sludge S from the retention part 2a of the filtration treatment tank 2 and the filtration treatment part 3, the valve V
1, V2, V9 are opened to supply the supply water to the filtration treatment tank 2 and the filtration treatment unit 3 through the clean water tank 4 to restore the initial state, and the muddy water TW is filtered again to sludge S and water W. Perform the work to separate.

In the embodiment of the present invention, one filter tank 2 is used.
The filtration circulation device A in the case of providing one filtration processing unit 3 has been described. However, in the case of using the double rotary tube pump, a plurality of filtration processing units are installed in the filtration processing tank and the same as in the present embodiment. Turbid water treatment.

In this case, by providing the two filtration processing sections, the filtration processing capacity of the muddy water can be doubled. Moreover, as in the case of this embodiment, one pump can be used for both muddy water supply and sludge suction and discharge, which makes it possible to reduce the size of the entire apparatus, which is extremely useful.

Further, in the present embodiment, it has been described that the filtration processing apparatus A can be mounted on the bed of a truck, but it is also possible to install the filtration processing apparatus A easily at a construction site by using a truck crane or the like.

[0058]

As described above, in the cooling water filter / circulator for a load cutter according to the present invention, turbid water containing sludge is pressure-fed by one pump to the filtration processing section of the filtration tank. The solid-liquid separated water stays in the retention part of the filtration treatment tank and is sent to the fresh water tank communicating with the retention part to be supplied and discharged as cooling water, while the sludge separated and accumulated in the filtration treatment part is filtered. It is possible to obtain the discharge treatment from the sludge discharge port provided at the bottom of the.

That is, it is possible to perform two stepwise operations of reusing the water dispersed by the filtering operation of the turbid water and discharging the sludge with one pump, and moreover, enabling the fresh water tank to communicate with the retention section. Since it is an integrated configuration, the entire device can be made compact, and even if this device is mounted on a truck, it can be transported without violating the overloading regulations and brought to the construction site because it is compact. The sludge treatment can be carried out quickly and smoothly, and the cooling water for the load cutter can be circulated and supplied.

Further, since the labor and size of the apparatus can be reduced, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a pipe system diagram of a cooling water filtering and circulating apparatus A for a road surface cutting machine according to the present invention.

FIG. 2 is a partially enlarged view of a filtering member shown in a B part in FIG.

[Explanation of symbols]

A Filtration / circulation device S Sludge ”W Water TW Turbid water 1 Pump 1a Suction port (suction side) 1b Discharge port (pressure feeding side) 2 Filtration treatment tank 2a Retention part of water separated from muddy water 3 Filtration treatment part 4 Fresh water tank 5 Load Cutter (road surface cutting machine) 8 Container 9a Fresh water outlet 9b Fresh water outlet 10 Cooling water supply hose 11 Storage tank 12 Turbid water suction pipe (turbid water suction route) 13 Sludge suction pipe (sludge suction route) 14 Turbid water pressure feed pipe (turbid water pressure feed) 15) Sludge discharge pipe (sludge discharge route) 16 Cooling water supply hose insert 17 Water discharge pipe 18 Drain hose insert 21a Filtration tank body 21b Lid 21c Sludge discharge ports 21d, 21e Communication pipe 22 Filtration member 22a Filtration material 22c Supporting material (punching metal) 23 Sludge accumulation section 24 Water drainage pipe (water drainage path) 2 5 Hose plug for drainage pipe 30 Fresh water tank V1 to V8 Switching valve V10, V11 〃 V9 Safety adjustment valve

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI B01D 29/10 530A (72) Inventor Yuji Yamaoka 4-31-6 Yoyogi, Shibuya-ku, Tokyo Nishi Shinjuku Matsuya Building Iseki Development Co., Ltd. In-flight (72) Inventor Chiyoaki Ono 8-14-14 Ginza, Chuo-ku, Tokyo Ginza Showa-dori Building High Tech Crease Co., Ltd. (56) References Japanese Patent Publication No. 61-28764 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) B01D 35/02 B01D 29/11 E01C 23/09

Claims (7)

(57) [Claims] 1. A device for filtering and circulating cooling water for a road surface cutting machine, a pump 1 for sucking and pumping turbid water TW containing sludge S through a turbid water suction path 12, and the turbid water pumped from the pump 1. A filtration treatment tank 2 for accommodating a filtration treatment section 3 for pressure-filtering the turbid water TW by the TW to separate it into sludge S and water W, and forming a retention section 2a of the water W separated by the filtration treatment section 3 And a container for accommodating sludge S and a muddy water pumping path 14 communicating with the filtration processing section 3 which can be sealed and opened on the pumping side of the pump 1, and a fresh water tank 4 which is provided so as to communicate with the retention section 2a. 8 is slidably connected to either one of the sludge discharge path 15 and the sludge suction path 1 that communicates with the muddy water suction path 12 and the filtration processing unit 3 on the suction side of the pump 1. Either by a selectable connection, the fresh water tank 4 to the road milling machine for road milling machine, characterized in that the cooling water supply pipe 9 is connected leading to the 5 coolant filtration circulation system with. 2. The cooling water filtering and circulating apparatus for a road surface cutting machine according to claim 1, wherein a plurality of the filtering processing units 3 are arranged in the filtering processing tank 2. 3. The muddy water T is provided inside the filtration processing unit 3.
3. A cooling water filtering circulation for a road surface cutting machine according to claim 1 or 2, wherein a filtering member 22 for separating W into water W and sludge S is arranged and configured to be capable of being sealed and pressurized. apparatus. 4. Communication pipes 21d and 21e are provided between the fresh water tank 4 and the retention portion 2a, and the communication pipes 21d and 21e are provided.
The fresh water tank 4 is provided integrally with the filtration treatment tank 2 via the cooling water filtration circulation device for a road surface cutting machine according to claim 1. 5. The sludge suction path 13 and the drainage path 24 leading to the retention portion 2a are connected to the suction side of the pump 1 in a selectable manner. A cooling water filter / circulator for a road surface cutting machine according to any one of claims. 6. The filter member 22 comprises a filter material 22a and a support material 22c for supporting the filter material in the filtration processing part 3, and a film-like sludge deposit portion is formed on the filter material. The cooling water filter / circulator for a road surface cutting machine according to any one of claims 1 to 5. 7. The retention section 2a is the filtration processing tank 2
The cooling water filtering and circulating apparatus for a road surface cutting machine according to any one of claims 1 to 6, wherein the cooling water filtering and circulating apparatus is formed so as to form a gap between the inner circumferential side surface and the bottom surface of the filtering member 22.