JP2006334448A - Underwater agitation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underwater agitation apparatus in which a head shaking motion is made by using the unused self-generating energy without using a head shaking motor and the flow velocity required to prevent the sedimentation of sludge can be secured by one agitator even in a deep-water treatment tank, the power consumption of which is made small and which is manufactured at a low cost. <P>SOLUTION: The underwater agitator 1 having a propeller 2 in the front is supported to be freely turned vertically around a horizontal shaft 3 arranged backward. A rudder blade 6 is supported pivotally to be turned freely by a steering shaft 5 extended laterally outward from the surfaces of seat plates arranged additionally on both sides of the underwater agitator 1. The leading edge part 14b of an elastic structure 14 having a base point 14a on a line to be formed by connecting the horizontal shaft 3 to the steering shaft 5 is connected to the tip or its vicinity of the rudder blade 6. The turning angle of the rudder blade 6 is regulated by stoppers 13 arranged oppositely from the vertical direction of the rudder blade 6 without being linked with the turn of the underwater agitator 1. The power of reversely turning the rudder blade 6 is energized by the action of the elastic structure 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underwater agitation apparatus that is mainly used to prevent sedimentation of sludge in a sewage treatment tank.

  As is well known, when a sewage treatment is performed using a biological reaction, a fixed propeller-type stirrer is often installed in order to prevent sludge settling in the treatment tank. In selecting the propeller type stirrer, it is general to select a propeller type stirrer capable of securing a flow velocity of 0.1 m / sec or more at a position 10 cm above the bottom of the tank in order to prevent sludge settling. However, in the treatment tank with the propeller type stirrer fixed in this way, the flow velocity is very high in the range where the direct flow from the propeller reaches, but the flow velocity is slow in the peripheral part, so the entire surface of the tank However, in order to secure a flow rate necessary for preventing sludge settling, it is often necessary to use a stirrer having a larger capacity than necessary.

  As a means for solving such a problem, a plurality of stirrers are arranged in parallel in the treatment tank, or the swinging motor and the rotational movement of the motor in a certain direction are adjusted to the normal position of the swinging rotation shaft. There is also a proposal of installing a stirrer having a swing function provided with a link mechanism for converting to a reverse rotation motion in a processing tank (for example, see Patent Document 1). Further, by diverting this mechanism to swinging in the vertical direction, it is possible to prevent sludge from sinking in a sewage treatment tank having a deep water depth. However, in any case, the problem with this scheme is that it requires a separate motor dedicated to swinging and consumes extra power, especially in the case of swinging in the vertical direction, the stirrer is adjusted to the depth of the middle layer. Needless to say, a motor dedicated for swinging must also use an expensive underwater specification motor that requires a watertight structure that can be installed underwater, resulting in increased manufacturing costs. .

JP 2002-316185 A (paragraph number 0011-0013)

  The problem to be solved is that the vertical swinging motion is performed by the self-generated energy that is not utilized without using a motor for swinging, and sludge settles on the entire surface of the tank by a single stirrer even in a deep water treatment tank. It is an object of the present invention to provide an underwater agitation apparatus that can secure a flow rate necessary for prevention, consumes less power, and is inexpensive to manufacture.

  In the present invention, an underwater agitator having a propeller at the front is supported so as to be rotatable in the vertical direction about a horizontal axis provided at the rear, and is outward from the surface of the seat plate attached to both sides of the underwater agitator. The rudder blade is pivotally supported by the rudder shaft that extends laterally, and the start end of the telescopic structure that places the base point on the line connecting the horizontal shaft and the rudder shaft is connected near the end of the rudder blade, The rotating angle of the rudder blade is regulated by a stopper fixed in an opposing manner from the vertical direction of the rudder blade without interlocking with the rotation of the underwater stirrer, and the reversal rotation power of the rudder blade is controlled by the action of the telescopic structure. The main feature is that it is configured to be energized.

  According to the underwater agitation apparatus of the present invention, the swinging motion is performed using the generated water flow at the time of driving the underwater agitator, which was used only for agitation in the tank. It is not necessary, it is simple in terms of structure, consumes less power, and costs are low, and even in a deep water treatment tank, the entire surface of the tank can be secured to prevent sludge settling with a single agitator. In addition, there is an advantage that it is easy to change and adjust the swing angle and turning speed.

  An underwater stirrer having a propeller at the front is supported so as to be able to rotate in the vertical direction about a horizontal axis provided at the rear, and protrudes outward from the surface of the seat plate attached to both sides of the underwater stirrer. The rudder blade is pivotally supported by the rudder shaft, and a gap is formed between the side surface of the underwater agitator and the back surface of the seat plate, and the base point is on the line connecting the horizontal axis and the rudder shaft. The starting end of the coil spring to be placed is connected to the vicinity of the end of the rudder blade through the gap, and the rudder blade is fixed by a stopper fixed in the opposite direction from the vertical direction of the rudder blade without interlocking with the rotation of the underwater agitator. And the reversal turning force of the rudder blade is urged by the action of the coil spring.

  1 and 2, reference numeral 1 denotes an underwater agitator having a propeller 2 at the front, which is supported so as to be rotatable in the vertical direction with a horizontal shaft 3 provided at the rear as a fulcrum. 4 is a seat plate attached to both sides of the underwater agitator 1, and a space through which the elastic structure 14 described later is formed between the back surface of the seat plates 4, 4 and the side surface of the underwater agitator 1. . Reference numerals 5 and 5 denote rudder shafts extending laterally outward from the surfaces of the seat plates 4 and 4, and reference numerals 6 and 6 denote rudder blades pivotally supported by the rudder shafts 5 and 5, respectively. In addition, a rudder angle adjusting mechanism comprising locking pins 7 and 7 can be provided on the front edge surface of the seat plates 4 and 4 so as to face each other in the vertical direction near the front end portions of the rudder blades 6 and 6. It is possible to change the rudder angle by changing the arrangement interval of the locking pins 7, 7 arranged on. Reference numerals 13 and 13 denote stoppers that are fixedly opposed to each other without interlocking with the rotation of the underwater agitator 1 from the vertical direction near the rear ends of the rudder blades 6 and 6. 14 and 14 are telescopic structures for energizing the reverse turning force to the rudder blades 6 and 6. The base points 14 a and 14 a are placed on the line connecting the horizontal shaft 3 and the rudder shafts 5 and 5, and the seat plate 4 , 4 through the gap between the underside of the underwater agitator 1 and the start end portions 14b, 14b are connected to the front end portions of the rudder blades 6, 6. Specific examples of the telescopic structure 14 in this case include a contraction spring, a rubber string, an air cylinder and an oil cylinder that perform a traction action. In addition, in the case where an air cylinder or an oil cylinder having a pressing action is used in addition to an extension spring or a repulsive rubber body as the expansion / contraction structure 14, the start end portions 14b and 14b of the expansion / contraction structures 14 and 14 are connected to the rudder blades 6 and 6, respectively. It will be connected to the rear end.

  About driving the underwater agitator 1 lowered into the treatment tank along the guide pipe 15, if the rudder blades 6 and 6 are fixed at a predetermined rudder angle in advance, the rotation of the propeller 2 is caused when the underwater agitator 1 is driven. The hydropower component generated by the generated water flow acts on the rudder blades 6 and 6, and in the example of FIG. The underwater agitator 1 continues to rotate upwards even when the rudder angle is narrowed by pushing the rear guide portions of the rudder blades 6 and 6 by the upper stoppers 13 and 13, but the start ends of the telescopic structures 14 and 14 When 14b and 14b exceed the position where they overlap on the straight line connecting the horizontal axis 3 and the rudder shafts 5 and 5, the rudder blades 6 and 6 are instantaneously reversed in the reverse direction by the traction force of the telescopic structures 14 and 14. Since the angle is widened to the original angle, the underwater agitator 1 starts to rotate downward with the horizontal shaft 3 as a fulcrum, and the rudder blades 6 and 6 are pushed by the lower stoppers 13 and 13 to push the rudder. Even if the angle is narrowed, the underwater agitator 1 continues to rotate downward, but the positions where the start ends 14b, 14b of the telescopic structures 14, 14 overlap the straight extension line connecting the horizontal shaft 3 and the rudder shafts 5, 5. The steering blades 6 and 6 are pulled by the pulling force of the telescopic structures 14 and 14 Because sometimes the positive direction to the reversed steering angle is widened to the original angle, underwater agitator 1 is again rotated upward the horizontal axis 3 as a fulcrum. By repeating this operation, the underwater agitator 1 swings in the vertical direction. Note that the swing angle can be changed by adjusting the facing distance between the stoppers 13 and 13, and the swing speed can be changed by adjusting the turning angle of the rudder blades 6 and 6.

It is a side view of the underwater agitator in the device of the present invention. It is a top view of the underwater stirrer in this invention apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underwater stirrer 2 Propeller 3 Horizontal shaft 4 Seat plate 5 Rudder shaft 6 Rudder blade 13 Stopper 14 Telescopic structure 14a Base point 14b Starting end

Claims (3)

  An underwater stirrer having a propeller at the front is supported so as to be able to rotate in the vertical direction about a horizontal axis provided at the rear, and protrudes outward from the surface of the seat plate attached to both sides of the underwater stirrer. The rudder blade is pivotally supported by the rudder shaft, and the starting end of the telescopic structure with the base point on the line connecting the horizontal axis and the rudder shaft is connected near the end of the rudder blade. The rotating angle of the rudder blade is regulated by a stopper fixed in an opposing manner from the vertical direction of the rudder blade without being interlocked with the movement, and the reverse turning force of the rudder blade is energized by the action of the telescopic structure. An underwater agitation device characterized by being configured as described above.   2. The underwater agitator according to claim 1, wherein a gap is formed between the side surface of the underwater agitator and the back surface of the seat plate, and the telescopic structure having a base point on a line connecting the horizontal axis and the rudder shaft is An underwater agitation device, wherein a starting end portion is connected to an end portion of a rudder blade through an air gap portion.   The underwater agitation device according to claim 1 or 2, wherein the telescopic structure for energizing the reverse turning force of the rudder blade is a coil spring.

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