JP3517014B2 - Sludge wicking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harbor, a river, a pond,
The present invention relates to a wicking device for dredging sludge accumulated in waterways and the like. 2. Description of the Related Art A conventional dredging device for removing accumulated sludge is equipped with a rotatable cutter at the tip of a ladder mounted on a barge so as to be variable in angle, and a suction pump installed on the barge. With the tip of the upper pipe facing just above the cutter,
The sludge is lifted up by the rotation of the cutter by the movement of the barge, and the sludge is sucked up with water by the suction pump. [0003] When a vacuum suction pump is used for suctioning sludge, additional equipment such as separation of sludge and a vacuum portion is required, which increases equipment costs and increases the water depth. Proportionally larger pumps are needed,
There is a problem that operating costs also increase. Further, the method of sucking sludge picked up by a cutter by vacuum suction involves a problem that the amount of sucked water is large, the amount of sucked sludge is reduced by that amount, and the sludge is diffused into the water to deteriorate water quality. There is also. Accordingly, an object of the present invention is to make it possible to suck sludge without using a vacuum suction pump, to reduce equipment and operating costs, and to surely and efficiently suck sludge. It is to provide a wicking device. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a sludge suction pipe having a lower end opening at the lower end thereof in communication with the suction pipe, and a sludge lowering opening. And a mixing chamber for mixing water with air, and an air curtain chamber connected to the outer periphery of the mixing chamber, the lower end of which is open around the mixing chamber, and an air supply pipe is connected. Rotating blades for scraping the sludge are provided, an air jet nozzle is provided in the mixing chamber, and a reflection portion of the air jetted from the nozzle is provided, and a nozzle for the air lift is provided in the sludge suction pipe. is there. With the sludge suction pipe inserted into the water and the mixing chamber at the lower end positioned above the sludge, air is supplied into the air curtain chamber to prevent water from entering the chamber, and the air jet nozzle and the air lift Air is ejected from the nozzles for use, and the entire apparatus is moved in the horizontal direction while rotating the rotating blades. [0008] By the insertion into water, water infiltrates into the mixing chamber and the sludge suction pipe, and in the mixing chamber, the air jetted from the jet nozzle is reflected by the contact with the reflecting portion to agitate the water. The upward flow of water occurs in the suction pipe due to the air jetted upward from the nozzle of the suction pipe. The rotating blades rake the sludge by rotation and movement of the apparatus, and the rising water flow generated in the suction pipe generates a suction force at the lower end opening of the mixing chamber. Is sucked into the mixing chamber together with the water just below. The sludge that has entered the mixing chamber is stirred with water by the turbulence of the air injected into the mixing chamber, is sucked into the suction pipe in a state of improved fluidity, and is removed by the air lift. Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in the figure, a sludge suction pipe 1 has a length corresponding to the depth of water, and is attached to a tip of an undulating arm 2 provided on a barge or the like so as to be variable in angle. The angle can be adjusted by the cylinder 3 provided, and the upper end side of the suction pipe 1 is bent horizontally on the water surface, and its end is not shown in the figure but is installed on a barge or land. It is arranged so as to be connected to or directly above. At the lower end of the sludge suction pipe 1, an inclined upper wall 5 is formed at the upper end of a cylindrical peripheral wall 4 having a diameter larger than that of the suction pipe 1, and the upper end of the inclined upper wall 5 is formed. A mixing chamber 6 communicating with the suction pipe 1 and having a lower end opened is provided, and a mixing chamber 6 for mixing sludge and water by air is provided. An air curtain chamber 7 surrounding the mixing chamber 6 and having an open lower end is provided around the mixing chamber 6. Is provided. As shown in FIGS. 1 and 3, the air curtain chamber 7 is formed by an upper wall 9 and a peripheral wall 8 into a plane triangular shape in which each corner is formed in an arc shape.
Projecting slightly below the lower end of the. An air supply pipe 10 for blowing air into the interior of the air curtain chamber 7 is connected to the air curtain chamber 7 to supply air to the air curtain chamber 7 in water, thereby preventing water from entering the interior of the air curtain chamber 7 and forming a hollow state. Is to be maintained. A plurality of rotating blades 11 for scraping sludge are located at a lower position extending from the mixing chamber 6 to the air curtain chamber 7.
Is provided. The rotary blades 11 are attached to a rotary shaft 12 vertically mounted on the peripheral wall of the mixing chamber 6 in the air curtain chamber 7.
The arm 13 is formed in a planar shape in which the arm 13 protrudes in an arc shape from the fixed base in three directions, and the upper end surface of the arm 13 is close to the lower end edge of the mixing chamber 6 as shown in FIG. Has a vertical height projecting below the lower end of the air curtain chamber 7, and is rotated by driving the rotary shaft 12 by a motor 14 installed on the air curtain chamber 7. In the case shown in the figure, the rotating blades 11 are arranged at three positions inside each corner of the air curtain chamber 14,
Although the arms 13 are rotated so as to rotate within the area surrounded by the air curtain chamber 7 and the arm 13 is rotated just below the mixing chamber 6, the number and arrangement of the rotating blades 11 reduce the sludge scraping effect. Think freely and choose. Inside the mixing chamber 6, an annular air pipe 15 is fixed along the inner peripheral surface of the peripheral wall 4, and an air supply pipe (not shown) is connected to the pipe 15 from outside the mixing chamber 6. A plurality of air jet nozzles 16 are connected to a lower portion of the pipe 15 and are fixed in an inclined arrangement so as to jet air toward the lower center of the mixing chamber 6. At the lower end of the mixing chamber 6, a pen holder 17 having a space through which sludge and water can pass is fixed. An air jet is applied to the surface of the light emitting device, and a reflecting portion 18 in the form of a circular plate is provided to reflect the air obliquely upward. A plurality of nozzles 19 for an air lift for injecting air supplied from the outside of the suction pipe 1 obliquely upward are arranged in a circle near the lower end inside the sled suction pipe 1. ing. The suction device of the present invention has the above-described configuration. Next, a method of dredging sludge will be described. As shown in FIG. 1, the sludge wicking pipe 1 is held substantially vertically and inserted into water, and the lower rotating blade 11 is sludge A
Install on top. In this state, a pressure air is supplied into the air curtain chamber 7 to increase the air pressure in the chamber 7,
The intruding water is pushed out, and the pressure is maintained so that the water level matches the height of the lower edge of the mixing chamber 6. In addition, water infiltrates from the mixing chamber 6 to the inside of the sludge suction pipe 1 up to the level of the surface water. In this state, air is ejected from the injection nozzle 16 toward the center of the lower portion in the mixing chamber 6, and at the same time, air is ejected obliquely upward from the nozzle 19 of the suction pipe 1. As a result, the water in the suction pipe 1 is lifted by an air lift and rises and flows out toward the upper end, so that a flow of water is generated in the mixing chamber 6 upward from the lower end opening. In the mixing chamber 6, the air jetted from the jet nozzle 16 hits the reflecting portion 18 to be reflected obliquely upward, and further hits the inner surface of the peripheral wall 4 so that the air and the rising water flow are stirred. Mix. In the above state, as shown by arrows in FIG. 3, when each rotating blade 11 is rotated and the whole apparatus is horizontally moved, each rotating blade 11 scrapes sludge with the arm 13 by rotation and movement. And brought directly below the mixing chamber 6. At the lower end of the mixing chamber 6, a suction force is generated by the upward and outflow of water in the suction pipe 1 by an air lift, and the sludge carried immediately below the mixing chamber 6 is mixed with water in the mixing chamber 6. Sucked into. As described above, since the air is injected into the mixing chamber 6, the water, the air and the sludge are surely mixed, and the sludge diffuses into the water to improve the fluidity. The mixture of water, air and sludge is sucked into the suction pipe 1 through the mixing chamber 6, and is supplied to the recovery device after rising inside the suction pipe 1. When the sled A is raked by the rotating blades 11, the range in which the arm 13 rotates just below the air curtain chamber 7 is an air layer formed by the air curtain, so that water is taken into the rotating blades 11 from above. There is an advantage that the probability of sludge or sludge escaping upward is reduced, and the efficiency of suction of sludge by the mixing chamber 6 is improved. In this way, by moving the entire apparatus, sludge can be suctioned and removed with the maximum arrangement width of the rotary blades 11, and the recovery apparatus dehydrates and separates a mixture of water and sludge to remove sludge. Can be extracted efficiently. As described above, according to the present invention, the sludge and water are stirred by the jet air and then sucked up by the air lift, so that the dredging of the sludge can be performed only by the jet of the air, and the vacuum pump is provided. This eliminates the need for the use of slag, reduces equipment costs, and mixes sludge with air and water in the mixing chamber, thereby improving the flowability of sludge and facilitating the transport of sludge by an air lift. In addition, the air curtain chamber is provided immediately above the portion where the rotating blades rotate outside the mixing chamber, so that the intake of water and the escape of sludge can be prevented, and the efficiency of sucking sludge can be improved. Can be.

[Brief description of the drawings] FIG. 1 is a longitudinal sectional front view of a suction device according to the present invention. FIG. 2 is a longitudinal sectional front view in which main parts of the above are enlarged. FIG. 3 is a bottom view in which main parts of the above are enlarged. FIG. 4 is a cross-sectional plan view taken along arrow IV-IV in FIG. [Explanation of symbols] 1 Suction tube 6 Mixing room 7 Air curtain room 11 rotating blades 13 arms 16 injection nozzle 18 Reflector 19 nozzle

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Claims (1)

(1) A mixing chamber for mixing sludge and water by air at the lower end of the sludge suction pipe, the upper part of which communicates with the suction pipe. A lower end is opened around the mixing chamber around the mixing chamber, the lower end is opened, and an air curtain chamber to which an air supply pipe is connected is provided.Rotating blades for scraping sludge are provided at lower positions of the mixing chamber and the air curtain chamber. An air jet nozzle and a reflection portion of the air jetted from the nozzle are provided,
A sludge wicking device provided with an air lift nozzle in the sludge wicking pipe.