JP2005144236A - Muddy water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muddy water treatment apparatus which can simplify its circuit configuration. <P>SOLUTION: This muddy water treatment apparatus comprises a nozzle unit 2 for spraying water onto a road surface L from an injection nozzle 1 and collecting muddy water together with earth and sand on the road surface L, a cyclone primary filtration tank 3 for carrying out primary filtration by centrifuging water and the earth and sand in the muddy water, an air-water separation tank 4 for separating water and air, a vacuum pump 5 for sucking only air from the air-water separation tank 4 to discharge it outside, a secondary filtration tank 6 for carrying out the secondary filtration of water W1 in the air-water separation tank 4, a normally and reversibly rotatable vortex pump 7 for sucking the water against the sucking force of the vacuum pump 5, a clear water tank 8 for storing clear water W2 discharged from the vortex pump 7, and a high-pressure pump 9 for forcibly feeding the clear water W2 to the injection nozzle 1 of the nozzle unit 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a muddy water treatment apparatus for removing earth and sand from muddy water.

  Permeable paved roads are paved roads that have surface road surfaces with air-permeable gaps, and rainwater that has flowed into the air gaps on the surface layer at the time of rain is drained by guiding it to the side grooves to prevent running obstructions such as hydroplaning. However, if soil or the like is clogged in the voids on the surface of the road surface, the drainage performance is degraded.

For this reason, conventionally, the clogging of the road surface is removed by a suction recovery device mounted on the vehicle. This suction recovery device is designed to inject high-pressure water toward the road surface to release soil and sand clogged in the gaps on the road surface, and to collect and collect mud water mixed with these water and earth and sand to separate air and water. A first recovery device that separates the muddy water after air-water separation into water and earth and sand by a cyclone action, and a second that separates the earth and sand from the water containing earth and sand with a cylindrical wire mesh filter. The fresh water tank which stores the reclaimed water filtered by these filter devices and these filter devices is mounted in the vehicle (for example, refer patent document 1).
Japanese Patent Laying-Open No. 2003-175398 (page 3, FIG. 1)

  In this suction recovery device, suction recovery means is installed between the cleaning device and the first filtration device. In addition to the suction pump circuit for operating this suction recovery means, the suction pump is pumped from the fresh water tank by the injector pump. There is a problem that it is necessary to install a pumping pump circuit that operates the injector with the regenerated water and pressurizes and supplies the water of the suction recovery means to the first filtration device.

  There is also a problem that a backwash circuit for supplying backwashing water under pressure to the backwashing injection nozzles of the first and second filtration devices from the fresh water tank by the backwashing pump must be installed. Furthermore, the second filtration device that separates earth and sand with a cylindrical wire mesh filter has a complicated structure, requires power, and requires a backwashing injection nozzle and the like.

  This invention is made | formed in view of such a point, and it aims at providing the muddy water processing apparatus which can simplify a circuit structure.

  The invention according to claim 1 is a cyclone-type primary filtration tank that performs primary filtration by centrifuging the recovered muddy water and sand, and water and air separated from the muddy water in the primary filtration tank. An air / water separation tank for separating the water, a vacuum pump for sucking only air from the air / water separation tank and discharging it to the outside, a secondary filtration tank for secondary filtration of the water in the air / water separation tank by a filter, A muddy water treatment apparatus comprising a vortex pump capable of reversing the water filtered by the filter of the next filtration tank against the suction force of the vacuum pump and a fresh water tank containing fresh water discharged from the vortex pump. The suction force of the vacuum pump sucked muddy water into a cyclone-type primary filtration tank to centrifuge the water and earth and sand in the muddy water, and further sucked into the air-water separation tank to separate the water and air. So, cyclone type primary filtration tank and moisture Multiple pump circuits for operating each tank are not required, and the circuit configuration can be simplified, and the vortex pump switches suction and discharge without degrading pressure performance by switching forward rotation to reverse rotation. Since it can be reversed, the fresh water in the fresh water tank can be fed back to the filter of the secondary filtration tank, and the filter of the secondary filtration tank can be back washed, and no special back washing circuit is provided. However, the filter clogging of the secondary filtration tank can be eliminated, and the circuit configuration can be simplified.

  According to the second aspect of the present invention, the primary unit is formed by centrifuging water and earth and sand in the muddy water collected by the nozzle unit, which injects water from the injection nozzle onto the road surface and collects muddy water together with the earth and sand on the road surface. A cyclone-type primary filtration tank for filtration, an air-water separation tank for separating water and air separated from muddy water in the primary filtration tank, and only air is sucked from the air-water separation tank and discharged to the outside. A vacuum pump that performs secondary filtration of the water in the air / water separation tank through a filter, and forward and reverse rotation that sucks water filtered by the filter of the secondary filtration tank against the suction force of the vacuum pump A high pressure pump comprising a possible eddy current pump, a fresh water tank containing fresh water discharged from the eddy current pump, and a high pressure pump for pumping fresh water in the fresh water tank to an injection nozzle of a nozzle unit From The drainage performance of the road surface can be regenerated by recovering the muddy water generated by spraying the water pumped to the slag unit onto the road surface of the permeable paved road from the injection nozzle, and recovered from the nozzle unit by the suction force of the vacuum pump. Since the muddy water on the road surface is sucked into the cyclone-type primary filtration tank, the water and earth and sand in the muddy water are centrifuged and further sucked into the air-water separation tank to separate the water and air, so the cyclone-type primary filtration tank Multiple pump circuits for operating the water and steam separation tanks are no longer necessary, simplifying the circuit configuration, and the vortex pump can switch suction to reverse without switching pressure forward. And the discharge can be reversed, so that it is possible to reversely wash the filter of the secondary filtration tank by feeding the fresh water in the fresh water tank back to the filter of the secondary filtration tank. Without providing a circuit can eliminate filter clogging of the secondary filter container can be simplified circuit configuration.

  The invention according to claim 3 is the mud treatment apparatus according to claim 1 or 2, which is disposed on the lower side of the primary filtration tank and has an upper surface opening type for collecting earth and sand separated primarily from the muddy water in the primary filtration tank. A primary sedimentation tank, a lid attached to the lower part of the primary filtration tank, which opens and closes the top opening of the primary sedimentation tank, an actuator for opening and closing the lid, and a primary sedimentation tank are detachably mounted. And a measuring instrument for measuring the weight of the earth and sand collected in the primary sedimentation tank. By measuring the weight of the earth and sand collected in the primary sedimentation tank by the measuring instrument, When the limit is reached, the primary sedimentation tank is removed from the primary sedimentation tank by opening the lid of the primary sedimentation tank with the actuator, and the primary precipitation tank is removed from the weighing instrument. The inner earth and sand can be easily emptied.

  According to a fourth aspect of the present invention, the filter of the secondary filtration tank in the muddy water treatment apparatus according to any one of the first to third aspects is earth and sand by a fine filtration gap between metal filter media wound in an expandable and contractible coil shape. A secondary sedimentation tank that collects the sediment separated by the spring filter, a pressure detector that detects the pressure on the suction side of the vortex pump that sucks water through the spring filter, Switching means for opening and closing a passage communicating the steam-water separation tank and the secondary filtration tank and opening and closing a passage communicating the secondary filtration tank and the secondary sedimentation tank, and at least the pressure detected by the pressure detector is large When the pressure is lowered to a set pressure lower than the atmospheric pressure, the switching means is controlled to close the passage connecting the steam separation tank and the secondary filtration tank, and open the passage connecting the secondary filtration tank and the secondary sedimentation tank. Eddy current The secondary filter tank filter is a spring filter that filters fine earth and sand through a fine filtration gap between metal filter media wound in an expandable and contractible coil shape. Therefore, the structure is simple, no power is required for filtering, and the minute filtration gap between the metal filter media wound in a coil shape is expanded by the backwashing pressure of the reversely fed fresh water. Clogging can be effectively eliminated without using a washing spray nozzle or the like. Further, the controller is configured to switch the steam / water separation tank and the secondary filtration tank by the switching means when the pressure detected by the pressure detector for detecting the pressure on the suction side of the vortex pump has decreased to at least a set pressure lower than the atmospheric pressure. By closing the passage communicating with the secondary filtration tank and opening the passage communicating between the secondary filtration tank and the secondary sedimentation tank and reversing the vortex pump, the process from filter clogging detection to filter backwashing can be automated.

  A fifth aspect of the present invention is the mud treatment apparatus according to the fourth aspect, wherein a water level detector for detecting a rise limit of the water level of the secondary sedimentation tank and a secondary sedimentation tank disposed on the suction side of the primary filtration tank. A drainage passage provided in the drainage passage and an open / close valve that is opened by a detection signal of the rise limit of the water level provided by the water level detector. The water level detector is provided in the secondary sedimentation tank. When the rising limit of the water level is detected, the detection signal is used to open the drainage passage opening / closing valve, and the water in the secondary sedimentation tank is drawn from the secondary sedimentation tank through the drainage passage using the suction force of the vacuum pump. It can be returned to the suction side of the filtration tank, and the pump circuit can be simplified by effectively using the vacuum pump.

  According to the first aspect of the present invention, the mud water is sucked into the cyclone type primary filtration tank by the suction force of the vacuum pump to centrifuge the water in the muddy water and the earth and sand, and further sucked into the air-water separation tank. Since water and air are separated, a plurality of pump circuits for operating the cyclone-type primary filtration tank and the air-water separation tank are not required, the circuit configuration can be simplified, and the vortex pump is By switching the rotation to reverse, the suction and discharge can be reversed without degrading the pressure performance, so the fresh water in the fresh water tank is fed back to the filter of the secondary filtration tank, and this secondary filtration The tank filter can be backwashed, and the filter clogging of the secondary filtration tank can be eliminated without providing a special backwash circuit, and the circuit configuration can be simplified.

  According to the second aspect of the invention, the drainage performance of the road surface can be regenerated by recovering the muddy water generated by spraying water pumped from the high pressure pump to the nozzle unit onto the road surface of the permeable paved road. By the suction force of the vacuum pump, the muddy water on the road surface collected from the nozzle unit is sucked into the cyclone type primary filtration tank, and the water and earth and sand in the muddy water are centrifuged, and further sucked into the air-water separation tank and water and air. Therefore, there is no need for multiple pump circuits to operate the cyclone-type primary filtration tank and the steam-water separation tank, respectively, and the circuit configuration can be simplified, and the vortex pump reverses the normal rotation. Since the suction and discharge can be reversed without degrading the pressure performance, the fresh water in the fresh water tank is fed back to the filter of the secondary filtration tank, and the filter of the secondary filtration tank is It is possible to backwash the filter, can also eliminate the filter clogging of the secondary filter container without providing a special backwash circuit, can be simplified circuit configuration.

  According to the third aspect of the present invention, the weight of the earth and sand collected in the primary sedimentation tank is measured by the measuring instrument, and when the amount of the earth and sand collected reaches the limit, the lid of the primary precipitation tank is obtained by the actuator. By separating the primary filtration tank from the primary sedimentation tank at the same time as opening the body, the primary sedimentation tank can be taken out of the measuring instrument and the earth and sand in the primary precipitation tank can be easily emptied.

  According to invention of Claim 4, since the filter of a secondary filtration tank is a spring filter which filters fine earth and sand with the fine filtration gap | interval between the metal filter media wound in the coil shape which can be expanded-contracted, structure In addition, it does not require power for filtering, and the fine filtration gap between the metal filter media wound in a coil shape is expanded by the backwash pressure of fresh water that has been fed back, so that the backwash injection Clogging can be effectively eliminated without using a nozzle. Further, the controller is configured to switch the steam / water separation tank and the secondary filtration tank by the switching means when the pressure detected by the pressure detector for detecting the pressure on the suction side of the vortex pump has decreased to at least a set pressure lower than the atmospheric pressure. By closing the passage communicating with the secondary filtration tank and opening the passage communicating between the secondary filtration tank and the secondary sedimentation tank and reversing the vortex pump, the process from filter clogging detection to filter backwashing can be automated.

  According to the fifth aspect of the present invention, when the water level detector detects the rising limit of the water level of the secondary sedimentation tank, it is only necessary to open the drain passage opening / closing valve according to the detection signal. Water can be returned from the secondary sedimentation tank to the suction side of the primary filtration tank through the drainage passage by the suction force of the vacuum pump, and the pump circuit can be simplified by effectively utilizing the vacuum pump.

  Next, the present invention will be described in detail with reference to the embodiment shown in FIGS.

  FIG. 1 shows a muddy water treatment apparatus mounted on a vehicle. This muddy water treatment apparatus injects water from a spray nozzle 1 onto a road surface L and collects muddy water together with soil on the road surface L, and this nozzle unit. The cyclone-type primary filtration tank 3 that centrifuges the muddy water collected in 2 and the earth and sand and performs primary filtration, and the air that separates the water and air separated from the muddy water in the primary filtration tank 3. A water separation tank 4, a vacuum pump 5 that draws only air from the air / water separation tank 4 and discharges it to the outside, a secondary filtration tank 6 that performs secondary filtration of the water W1 in the air / water separation tank 4 with a filter, A vortex pump 7 capable of reversing the water filtered by the filter of the secondary filtration tank 6 against the suction force of the vacuum pump 5 and a fresh water tank containing fresh water W2 discharged from the vortex pump 7. 8 and nozzle of fresh water W2 in the fresh water tank 8 It has and a high-pressure pump 9 such as a diaphragm pump for pumping to the injection nozzle 1 of knit 2. The pipe line 7a connected to the discharge port of the vortex pump 7 is inserted into the fresh water tank 8 so as to function as a suction pipe as well as a discharge pipe.

  In the cyclone type primary filtration tank 3, a pipe line 12 from the nozzle unit 2 is connected to the cylindrical part 11 in a tangential direction, so that swirl motion is generated in the mud water sucked into the cylindrical part 11 from the pipe line 12. Then, centrifugal force acts and the sediment in the muddy water has a large specific gravity so that it sinks under its own weight while swirling along the inner wall of the cylindrical part 11, while the water is from the pipe 13 arranged in the central part of the cylindrical part 11. Sucked outside.

  An opening / closing valve 15 such as an electromagnetic valve is provided in a passage 14 that communicates the pipe 13 of the primary filtration tank 3 and the suction port side of the steam separator 4, and the sediment collection of the primary filtration tank 3. A drain pipe 17 inserted into the outlet portion 16 is connected to the suction port side of the steam / water separation tank 4 via an on-off valve 18 such as an electromagnetic valve.

  Below the primary filtration tank 3, a primary sedimentation tank 19 having an open top surface for collecting earth and sand primarily separated from muddy water in the primary filtration tank 3 is disposed. A lid 20 for opening and closing the upper surface opening of the primary sedimentation tank 19 is attached to the sediment outlet 16, and a plurality of air cylinders for opening and closing the lid 20 are provided below the lid 20. Actuator 21 is installed. Further, below the primary sedimentation tank 19, a measuring device 22 is installed to detachably mount the primary sedimentation tank 19 and measure the weight of the earth and sand collected in the primary sedimentation tank 19. .

  Inside the steam separation tank 4, a water level detector 23 such as a float switch for detecting the upper and lower limit levels of the water W1 is provided, and a shielding plate 24 for shielding the suction port of the vacuum pump 5 from the water surface is provided. It has been. The inside of the steam / water separation tank 4 is partitioned by a filter medium 4a such as a net or a punching plate.

  The filter of the secondary filtration tank 6 is a spring filter 25 for filtering earth and sand through a minute filtration gap between metal filter media wound in a stretchable coil shape. A secondary sedimentation tank 26 for collecting earth and sand secondarily separated by the spring filter 25 is disposed.

  A pressure detector 28 that detects the pressure on the suction side of the vortex pump 7 that sucks water through the spring filter 25 is installed in a passage 27 that connects the secondary filtration tank 6 and the vortex pump 7.

  The pressure detector 28 is connected to a controller 29. The controller 29 opens and closes a passage 30 that connects the steam / water separation tank 4 and the secondary filtration tank 6 and at the same time the secondary filtration tank 6 and the secondary sedimentation tank 26. Are connected to the on-off valves 32 and 33 such as two electromagnetic valves as switching means for opening and closing the passage 31 communicating with the vortex pump 7. As the switching means, the two on-off valves 32 and 33 may be combined into one switching valve.

  The controller 29 closes and controls the open / close valve 32 to control the steam / water separation tank 4 and the secondary filtration tank 6 when the pressure detected by the pressure detector 28 is reduced to at least a set pressure lower than the atmospheric pressure. The passage 30 is closed, and the opening / closing valve 33 is controlled to open the passage 31 communicating the secondary filtration tank 6 and the secondary sedimentation tank 26. At the same time, the drive motor of the vortex pump 7 is reversed from normal rotation. Control the direction of turn.

  The secondary sedimentation tank 26 is provided with a water level detector 34 for detecting the rise limit of the water level of the water W3 in the secondary sedimentation tank 26, and the secondary sedimentation tank 26 is connected to the primary filtration tank 3. A drainage passage 35 is disposed over the suction side, and an open / close valve 36 such as an electromagnetic valve that is opened by a drive signal output from the controller 29 in response to a detection signal of the water level rise limit by the water level detector 34 in the drainage passage 35. Is provided.

  The fresh water tank 8 is provided with a water level detector 37 for detecting the water level of the fresh water W2 in the fresh water tank 8, and the controller 29 controls the eddy current pump 7 based on the detection signal from the water level detector 37. To do. For example, when the level of the fresh water W2 in the fresh water tank 8 reaches the rising limit, the vortex pump 7 is stopped.

  A valve 38 for collecting sediments such as earth and sand and sludge is attached to the lower part of the fresh water tank 8 and the secondary sedimentation tank 26, and a container 39 is disposed.

  As shown in FIG. 2, the spring filter 25 of the secondary filtration tank 6 has a plurality of long members 43 projecting downward from an upper member 42 having mounting screws 41. A lower spring receiving member 44 is integrally provided between the lower portions, and a plurality of long members 46 project upward from a lower member 45 that is movable up and down with respect to the upper member 42. These long members An upper spring receiving member 47 is integrally provided between the relatively upper portions of 46, and a compression coil spring 48 is provided between both spring receiving members 44, 47. The upper spring receiving member 47 is pushed up, and the lower member 45 is urged upward via the long member 46.

  A screw rod 51 is screwed into the central portion of the lower member 45 from the lower side and integrated, and the screw rod 51 is inserted into the hole 53 of the locking plate 52 fixed to the lower spring support member 44. Then, a nut 54 is screwed into the upper end portion of the screw rod 51 protruding upward from the hole 53 and is subjected to a turning process, and the lower member 45 is slightly lowered between the nut 54 and the locking plate 52. A possible axial gap 55 is provided.

  Between the upper member 42 and the lower member 45 having such attachment relation, a series of metal filter media 56 formed in a coil shape is provided so as to be extendable and contractible. The coil-shaped metal filter medium 56 has a slight height convex portion formed integrally with the spiral portion 56a between the adjacent spiral portions 56a and 56a, so that the space between the spiral portions 56a and 56a. Even if they are closely attached, a slight filtration gap 57 is formed between them.

  The long members 43 and 46 are positioned at equal intervals on the outer peripheral portion of the compression coil spring 48 and function as guide members for the compression coil spring 48, and are positioned at equal intervals on the inner peripheral portion of the metal filter medium 56. It also functions as a guide member for the filter medium 56.

  As shown in FIG. 3, the eddy current pump 7 is configured such that an impeller 62 is rotatably fitted in a pump main body 61. The blade grooves 64 between the blades 63 are provided at a constant pitch, and the rotating shaft 65 fitted in the center of the blade wheel 62 is rotated by an external reversible motor so that the small blades together with the blade wheel 62 are provided. 63 and the blade groove 64 rotate.

  An annular pressure increasing passage 66 is formed between the pump body 61 and the impeller 62, and a normal rotation inlet 67a connected to the external passage 27 is connected to the normal rotation inlet 67 of the pressure increasing passage 66. A normal rotation outlet 68a connected to the pipe line 7a inserted into the fresh water tank 8 is communicated with the normal rotation outlet 68 of the pressure increasing passage 66, and a normal rotation inlet 67 and a normal rotation outlet 68 are connected to each other. An isolation part 69 is formed between the two.

  3A, when the impeller 62 of the vortex pump 7 is rotated forward, the liquid sucked into the forward rotation inlet 67 from the normal rotation suction port 67a is boosted together with the impeller 62. The passage 66 is made almost a full turn in the counterclockwise direction, and the pressure is increased in the meantime and discharged from the normal rotation outlet 68 to the outside through the normal discharge outlet 68a.

  At that time, in the liquid sucked into the pressure increase passage 66, a vortex is generated between each blade groove 64 of the impeller 62 and the pressure increase passage 66, and the generation of this vortex is simultaneously performed in each blade groove 64 while increasing the pressure. The pressure in the passage 66 is increased as the pressure passage 66 is advanced.

  Such a pumping action is similarly performed when the impeller 62 is reversed as shown in FIG. 3 (b), and the liquid sucked into the forward rotation outlet 68 from the forward rotation outlet 68a Along with the vehicle 62, the pressure-increasing passage 66 makes a round in the clockwise direction, and during that time, the pressure is increased and discharged from the normal rotation inlet 67 to the outside through the normal rotation inlet 67a.

  Next, the operation of the illustrated embodiment will be described.

  While supplying fresh water to the fresh water tank 8 from the outside, the fresh water W 2 in the fresh water tank 8 is pumped to the injection nozzle 1 of the nozzle unit 2 by the high pressure pump 9, and the high pressure water injected from the injection nozzle 1 onto the road surface L is The earth and sand clogged in the gap of the road surface L is released.

  As a result, the muddy water mixed with the water generated in the nozzle unit 2 and the earth and sand is collected together with the air by the suction force of the vacuum pump 5, and the muddy water is sucked into the cyclone-type primary filtration tank 3 and swirling. The muddy water and the earth and sand are centrifuged, the water is sucked into the air / water separation tank 4 together with the air from the pipe 13, and the earth and sand is swirled in the primary filtration tank 3 to be the primary precipitate. It settles in the tank 19.

  The air / water separation tank 4 separates the sucked water and air and removes light and large dust such as vinyl by the filter medium 4a. The water level of the water W1 is monitored by the water level detector 23.

  Simultaneously with the filtration operation on the primary side, the on-off valve 32 is opened on the secondary side, the on-off valve 33 is closed, and the vortex pump 7 is rotated forward to perform the filtration operation with the secondary filtration tank 6.

  That is, the suction force of the vortex pump 7 sucks the water W1 in the steam / water separation tank 4 into the secondary filtration tank 6 against the suction force of the vacuum pump 5 and removes microparticles in the water by the spring filter 25. Then, fresh water is supplied to the fresh water tank 8.

  At this time, as shown in FIG. 2A, the lower member 45 is biased upward with respect to the upper member 42 by the repulsive force of the compression coil spring 48 of the spring filter 25, and the upper member 42 and the lower member 45 are urged upward. The coil-shaped metal filter medium 56 is compressed to the shortest state, and the water W1 is sucked from the outside to the inside of the metal filter medium 56 through the slight filtration gap 57 between the adjacent spiral portions 56a, 56a. The fine particles are caught in the filtration gap 57 between the spiral portions 56a and 56a and separated and removed from the water.

  On the other hand, when the filtration gap 57 of the spring filter 25 is clogged with fine particles, the pressure on the suction side of the vortex pump 7 decreases to at least a set pressure lower than the atmospheric pressure (negative pressure increases). The controller 29 detected by the pressure detector 28 closes the passage 30 between the steam / water separation tank 4 and the secondary filtration tank 6 by closing the on-off valve 32 and opening the on-off valve 33, and at the same time the secondary filtration tank. The reverse flow of the spring filter 25 is automatically started by reversing the vortex pump 7 after opening the passage 31 between 6 and the secondary sedimentation tank 26.

  That is, by rotating the vortex pump 7 that can be rotated in the forward and reverse directions, the fresh water W2 in the fresh water tank 8 is sent back to the spring filter 25 of the secondary filter tank 6, thereby secondary pressure is generated by the water pressure in the direction opposite to that when filtering. The spring filter 25 of the filter tank 6 is automatically backwashed.

  In the spring filter 25 at the time of backwashing, the internal pressure in the metal filter medium 56 rises due to the backwashing pressure of the fresh water W2 fed back, and the nut 54 is below the axial gap 55 that engages with the locking plate 52. Since the member 45 is lowered, a minute filtration gap 57 between the metal filter media of the spiral portions 56a and 56a wound in a coil shape as shown in FIG. The fine particles 58 that have been clogged are discharged to the outside of the metal filter medium 56 by backwashing water pressure, the clogging is eliminated, and the filtration function of the metal filter medium 56 is regenerated. The fine particles 58 are discharged together with water into the secondary settling tank 26 and settled at the bottom thereof.

  When the water level of the secondary sedimentation tank 26 reaches the rising limit during such backwashing, the controller 29 opens the on-off valve 36 of the drainage passage 35 according to the detection signal of the water level detector 34. Sometimes, the water in the secondary sedimentation tank 26 is returned to the suction side of the primary filtration tank 3 through the drainage passage 35 by the suction force of the vacuum pump 5 in operation, so that the water surface of the secondary sedimentation tank 26 overflows. Never do.

  Moreover, since the weight of the earth and sand collected in the primary sedimentation tank 19 is measured by the measuring device 22, the vortex pump 7 and the high-pressure pump 9 are stopped when the amount of the earth and sand collected reaches the limit. At the same time, by closing the on-off valve 15 and opening the on-off valve 18, water is drawn from the upper part of the primary sedimentation tank 19 by the suction force of the vacuum pump 5, and water is spilled by the subsequent removal operation of the primary precipitation tank 19. To prevent.

  Then, the lid 20 of the primary sedimentation tank 19 is opened by the actuator 21, and at the same time, the primary filtration tank 3 is separated from the primary sedimentation tank 19 together with this lid 20, and 1 is measured from above the measuring instrument 22 using a crane or the like. The secondary sedimentation tank 19 is taken out, the earth and sand in the primary sedimentation tank 19 is emptied, set again to the state shown in the figure, and the filtration operation is resumed.

  Next, effects of the illustrated embodiment will be described.

  The drainage performance of the road surface L can be regenerated by recovering the muddy water generated by jetting the water pumped from the high pressure pump 9 to the nozzle unit 2 onto the road surface L of the permeable paved road from the jet nozzle 1, and the vacuum pump 5 The muddy water collected by the nozzle unit 2 is sucked into the cyclone-type primary filtration tank 3 by the suction force, and the water and earth and sand in the muddy water are centrifuged, and further sucked into the air-water separation tank 4 to separate the water and air. Therefore, a plurality of pump circuits for operating the cyclone type primary filtration tank 3 and the steam-water separation tank 4 are not required, and the circuit configuration can be simplified.

  Since the vortex pump 7 can reverse the suction and discharge without degrading the pressure performance by switching the forward rotation to the reverse rotation, the fresh water W2 in the fresh water tank 8 is removed from the spring filter of the secondary filtration tank 6. The spring filter 25 can be backwashed back to 25, and the spring filter 25 can be backwashed. The clogging of the spring filter 25 can be eliminated without providing a special backwash circuit, and the circuit configuration can be simplified.

  When the weight of earth and sand collected in the primary sedimentation tank 19 is measured by the measuring device 22 and the amount of sediment collected reaches the limit, the lid 20 of the primary sedimentation tank 19 is opened by the actuator 21 at the same time. By separating the primary filtration tank 3 from the primary precipitation tank 19, the primary precipitation tank 19 can be taken out from the measuring instrument 22 and the earth and sand in the primary precipitation tank 19 can be easily emptied.

  Since the spring filter 25 of the secondary filtration tank 6 filters fine earth and sand through a minute filtration gap 57 between the metal filter media 56 wound in a stretchable coil shape, the structure is simple and power for filtering is reduced. In addition, since the minute filtration gap 57 between the metal filter media 56 wound in a coil shape is enlarged by the backwash pressure of the fresh water W2 fed back, a conventional backwashing injection nozzle, etc. Clogging can be effectively eliminated without using.

  The controller 29 closes the on-off valve 32 and closes the steam / water separation tank 4 when the pressure detected by the pressure detector 28 for detecting the pressure on the suction side of the vortex pump 7 has decreased to at least a set pressure lower than the atmospheric pressure. By closing the passage 30 between the secondary filtration tanks 6 and opening the on-off valve 33 to open the passage 31 between the secondary filtration tank 6 and the secondary sedimentation tank 26 and simultaneously reversing the vortex pump 7, Automatic detection from 25 clogging detection to filter backwashing.

  When the water level detector 34 detects the rise limit of the water level in the secondary sedimentation tank 26, the controller 29 simply opens the on-off valve 36 of the drainage passage 35 based on the detection signal, and the water in the secondary sedimentation tank 26 is detected. Can be returned from the secondary sedimentation tank 26 to the suction side of the primary filtration tank 3 through the drainage passage 35 by the suction force of the vacuum pump 5, and the pump circuit can be simplified by effectively using the vacuum pump 5.

  The illustrated embodiment is a muddy water treatment apparatus having a nozzle unit 2 and a high-pressure pump 9 suitable for regenerating the drainage performance of the road surface L of a permeable paved road. In the case where the muddy water is purified and drained, the muddy water treatment apparatus is configured with the nozzle unit 2 and the high-pressure pump 9 removed. Also in this case, the muddy water collected by the suction force of the vacuum pump 5 is sucked into the cyclone-type primary filtration tank 3 to centrifuge the water and earth and sand in the muddy water, and further sucked into the steam-water separation tank 4 to obtain water and air. Therefore, a plurality of pump circuits for operating the cyclone type primary filtration tank 3 and the steam / water separation tank 4 are not required, the circuit configuration can be simplified, and the vortex pump 7 can be By switching the rotation to reverse, the suction and discharge can be reversed without reducing the pressure performance, so the fresh water W2 in the fresh water tank 8 is fed back to the spring filter 25 of the secondary filtration tank 6. The spring filter 25 can be backwashed, the clogging of the spring filter 25 can be eliminated without providing a special backwash circuit, and the same effect can be obtained that the circuit configuration can be simplified.

1 is a circuit diagram showing an embodiment of a muddy water treatment apparatus according to the present invention. (A) is sectional drawing which shows an example of the spring filter in the same muddy water processing apparatus, (b) is a partially expanded sectional view which shows the effect | action at the time of the backwashing. (A) is sectional drawing which shows the normal rotation state of the eddy current pump in the same mud treatment apparatus, (b) is sectional drawing which shows the reverse rotation state at the time of the backwashing.

Explanation of symbols

L Road surface W2 Fresh water 1 Injection nozzle 2 Nozzle unit 3 Primary filtration tank 4 Air / water separation tank 5 Vacuum pump 6 Secondary filtration tank 7 Eddy current pump 8 Fresh water tank 9 High pressure pump
19 Primary precipitation tank
20 lid
21 Actuator
22 Weighing scale
25 Spring filter as a filter
26 Secondary sedimentation tank
28 Pressure detector
29 Controller
30, 31 passage
32, 33 On-off valve as switching means
34 Water level detector
35 Drainage passage
36 On-off valve
56 Metal filter media
57 Filtration gap

Claims (5)

A cyclone-type primary filtration tank that centrifuges the collected muddy water and earth and sand for primary filtration;
An air / water separation tank for separating water and air separated from the muddy water in the primary filtration tank;
A vacuum pump that draws only air from the steam separation tank and discharges it outside,
A secondary filtration tank for secondary filtration of the water in the steam-water separation tank with a filter;
A vortex pump capable of reversing forward and reverse for sucking the water filtered by the filter of the secondary filtration tank against the suction force of the vacuum pump;
A muddy water treatment apparatus comprising: a fresh water tank for containing fresh water discharged from the vortex pump. A nozzle unit that injects water from the injection nozzle onto the road surface and collects muddy water together with the soil on the road surface;
A cyclone-type primary filtration tank that centrifuges the muddy water collected by the nozzle unit and the earth and sand for primary filtration;
An air / water separation tank for separating water and air separated from the muddy water in the primary filtration tank;
A vacuum pump that draws only air from the steam separation tank and discharges it outside,
A secondary filtration tank for secondary filtration of the water in the steam-water separation tank with a filter;
A vortex pump capable of reversing forward and reverse for sucking the water filtered by the filter of the secondary filtration tank against the suction force of the vacuum pump;
A fresh water tank for containing fresh water discharged from the vortex pump;
A muddy water treatment apparatus comprising: a high-pressure pump for pumping fresh water in the fresh water tank to an injection nozzle of a nozzle unit. A primary sedimentation tank with an open top surface, which is disposed below the primary filtration tank and collects the earth and sand primarily separated from the muddy water in the primary filtration tank;
A lid attached to a lower portion of the primary filtration tank and opening and closing an upper surface opening of the primary precipitation tank;
An actuator for opening and closing the lid,
3. A muddy water treatment apparatus according to claim 1 or 2, further comprising a measuring instrument that detachably mounts the primary sedimentation tank and measures the weight of the earth and sand collected in the primary sedimentation tank. The filter of the secondary filtration tank is a spring filter that filters earth and sand through a minute filtration gap between metal filter media wound in a stretchable coil shape,
A secondary sedimentation tank for collecting earth and sand secondarily separated by the spring filter;
A pressure detector that detects the pressure on the suction side of a vortex pump that sucks water through a spring filter;
A switching means for opening and closing a passage communicating the steam-water separation tank and the secondary filtration tank and opening and closing a passage communicating the secondary filtration tank and the secondary sedimentation tank;
When the pressure detected by the pressure detector decreases to at least a set pressure lower than the atmospheric pressure, the switching means is controlled to close the passage connecting the steam-water separation tank and the secondary filtration tank to the secondary filtration tank and the secondary filtration tank. 4. A muddy water treatment apparatus according to claim 1, further comprising a controller that opens a passage communicating with the settling tank and reverses the vortex pump. A water level detector for detecting the rise limit of the water level in the secondary sedimentation tank;
A drainage passage disposed on the suction side of the primary filtration tank from the secondary sedimentation tank;
The muddy water treatment apparatus according to claim 4, further comprising: an on-off valve provided in the drainage passage and opened by a detection signal of a rise limit of the water level by a water level detector.

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