JP2010029828A - Agitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitator which is used in water treatment facilities, has light weight and maintenance of which is easy. <P>SOLUTION: A carbon fiber-containing glass fiber reinforced plastic which contains carbon fiber by at least 5 to 20% among 30 to 60% fiber volume ratio is used as a main shaft 10 of the agitator 1 used in the water treatment facilities, an arm 20 connected with the main shaft 10 and an agitation blade 30 connected with the arm 20. Further at a joint 11 between the main shaft 10 and the arm 20, a reinforcing material 12 is provided inside the main shaft 10 and a cross-section of the agitation blade 30 is made to be U-shaped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an agitator used in a water treatment facility.

  In water treatment facilities, a stirrer (mixer) for flocculating the flocculant and sterilizing agent / oxidizing agent / alkaline agent, etc. thrown in the mixing pond into fine flocs and a flocculant A slow stirrer (flocculator) that gently stirs in order to greatly grow the generated floc and two types of stirrers are used (see Patent Document 1 below). Conventionally, the components constituting these agitators have been formed of iron or stainless steel, except that the stirring blades of the slow agitator are formed of synthetic wood. However, rusting occurs in iron and stainless steel due to the corrosiveness of flocculants and chemicals, and synthetic wood has poor light resistance and deteriorates due to ultraviolet rays. Therefore, it is necessary to paint regularly at the time of manufacture and after installation. There was a problem that a great deal of labor was required for maintenance.

  In addition, since the agitator used in the water treatment facility is a single piece of large equipment, it is necessary to assemble the parts at the place where they are installed. However, iron and stainless steel have a large specific gravity, so the weight of the parts and the product weight are high. It was heavy, and there was a problem that transportation, loading / unloading, and installation work required large costs, labor, and energy.

  Further, the horizontal slow agitator has a problem that the product weight after assembly is heavy, so that the load applied to the bearing portion is large and the wear of the bearing material is fast.

  It is also possible to use aluminum with a low specific gravity as the material, but it is difficult to work with, has poor corrosion resistance, and has low strength and bending rigidity, resulting in poor durability and high cost. It was not. In addition, conventional glass fiber reinforced plastics were superior in strength and corrosion resistance to iron and stainless steel, but they were not adopted because they were considered to have insufficient bending rigidity for use in parts with rotational action. .

JP 2008-68232 A

  The present invention has been made in order to solve the above-mentioned problems, and its object is to have excellent corrosion resistance, light resistance, etc., easy maintenance, and light weight as a product. It is to provide an agitator that can.

  In order to achieve the above object, a stirrer according to claim 1 of the present invention comprises a main shaft used in a water treatment facility, an arm connected to the main shaft, and a stirring blade connected to the arm. In the machine, a glass fiber reinforced plastic containing carbon fiber is used for at least one of the main shaft, the arm, and the stirring blade.

  Further, the stirrer according to claim 2 of the present invention is a stirrer including a main shaft used in a water treatment facility and a stirring blade connected to the main shaft, and at least one of the main shaft and the stirring blade. It is characterized by using glass fiber reinforced plastic with crab carbon fiber.

  Moreover, the stirrer according to claim 3 of the present invention is the stirrer according to claim 1, characterized in that a reinforcing material is provided inside a joint portion of the main shaft connected to the arm. To do.

  A stirrer according to a fourth aspect of the present invention is the stirrer according to any one of the first to third aspects, wherein the cross-sectional shape of the stirring blade is a U-shape. is there.

  A stirrer according to a fifth aspect of the present invention is the stirrer according to any one of the first to fourth aspects, wherein the carbon fiber-containing glass fiber reinforced plastic has a fiber volume ratio of 30 to 60. % Is contained in at least 5 to 20%.

  The stirrer of the present invention having the above configuration is a conventional product in which a glass fiber reinforced plastic containing carbon fiber used in at least one of a main shaft, an arm, and an agitating blade is provided. It has higher strength than iron / stainless steel or synthetic wood used in steel, and its bending rigidity is superior to that of iron / stainless steel, so it is not inferior to synthetic wood. Can be extended. In addition, carbon fiber-reinforced glass fiber reinforced plastics have a lower specific gravity than iron and stainless steel, so the weight of parts and products can be greatly reduced, and transportation, loading / unloading, and installation work can be performed easily. In addition, the cost for installation work can be reduced. Further, since the product weight is reduced in the horizontal type slow agitator, the load on the bearing portion is reduced, the replacement interval of the bearing material can be extended, and the maintenance management can be facilitated.

  In addition, glass fiber reinforced plastic with carbon fiber does not generate rust even when it is constantly in contact with water containing a strong oxidizing agent, such as flocculants and chemicals. The used stirrer does not need to be painted even during production and after installation and can be easily maintained.

  In addition, when a glass fiber reinforced plastic containing carbon fiber is used for the main shaft, if a reinforcing material is provided inside the main shaft joint connected to the arm, the durability of the joint where stress is concentrated is improved. Product life can be extended.

  In addition, when glass fiber reinforced plastic containing carbon fiber is used for the stirring blade, if the cross-sectional shape of the stirring blade is U-shaped, the thickness of the stirring blade can be increased while ensuring the same bending rigidity as the conventional product. It can be made thinner.

  Moreover, when carbon fiber-containing glass fiber reinforced plastic containing at least 5 to 20% of the fiber volume ratio of 30 to 60% is used, the specific gravity is 1.8 and 1/4 of the iron. Therefore, if the main shaft and arm are equipped, if glass fiber reinforced plastic containing carbon fiber is used for all of the arm and the stirring blade, the weight of the product is made of iron or stainless steel except that the stirring blade is formed of synthetic wood. It can be reduced by about 40% with respect to the molded slow agitator, and can be reduced by about 70% with respect to the rapid agitator formed entirely of iron or stainless steel.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

First embodiment:
The stirrer according to the first embodiment of the present invention is a horizontal slow-speed stirrer (horizontal axis flocculator) for aggregating flocs formed in a mixing pool by repeatedly colliding with each other. 1 is an explanatory view, FIG. 2 is a partially enlarged view of A in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.

  The horizontal slow agitator 1 according to the present invention includes a main shaft 10, an arm 20, and a stirring blade 30.

  The main shaft 10 has a cylindrical shape and is supported by a bearing portion 40 to rotate. As shown in FIG. 2, an iron reinforcing material 12 is provided inside the main shaft 10 and in a joint portion 11 with an arm 20 described later. Therefore, when the L-shaped coupling portion 42 and the main shaft 10 are coupled by the screw 41 to couple the main shaft 10 and the arm 20 via the L-shaped coupling portion 42, the screw 41 is screwed with the reinforcing member 12. It has become. The material of the main shaft 10 is a glass fiber reinforced plastic containing carbon fiber, and a part of the fiber portion of the glass fiber reinforced plastic having a fiber volume ratio of 30 to 60% reinforced with a fiber containing glass fiber that is usually used is used. The carbon fiber is replaced with carbon fiber, and the carbon fiber is contained in at least 5 to 20% of the fiber volume ratio of 30 to 60%.

  The arm 20 is a member to which a stirring blade 30 to be described later is coupled, and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. The arm 20 rotates with the stirring blade 30 by the rotation of the main shaft 10. The material of the arm 20 is the same as the main shaft 10 and is a glass fiber reinforced plastic containing carbon fiber.

  As shown in FIG. 3, the stirring blade 30 has a function of rotating together with the arm 20 by the rotation of the main shaft 10 to grow a floc, so that the stirring blade 30 is formed to have a large area with respect to the rotation direction X, and has a plate thickness. The cross-sectional shape perpendicular to the longitudinal direction is U-shaped so that it can resist the pressure of water even when it is thinned. The material of the stirring blade 30 is the same as that of the main shaft 10 and is a glass fiber reinforced plastic containing carbon fibers.

  As shown in FIGS. 5 to 8, the horizontal slow agitator 1 having the above-described configuration has the same material for the main shaft 10, the arm 20, and the stirring blade 30, and the carbon fiber has a fiber volume ratio of 30 to 60%. Is made of glass fiber reinforced plastic with carbon fiber contained in at least 5 to 20%, so the conventional stirring blade is made of synthetic wood, and the main shaft and arm are made of iron or stainless steel Compared with the slow agitator, the product weight of the slow agitator 1 can be reduced by about 40%. Therefore, transportation, loading / unloading, and installation work can be easily performed, and costs for the installation work can be reduced. Moreover, the load concerning the bearing part 40 can be reduced, the replacement interval of the members of the bearing part 40 can be extended by 1.5 times, and the maintenance can be facilitated.

  Furthermore, because it is made of glass fiber reinforced plastic with carbon fiber, it does not generate rust and has good light resistance, so it is not necessary to paint on the main shaft 10, the arm 20 and the stirring blade 30 in order to improve corrosion resistance. Management can be facilitated.

  Further, since the reinforcing member 12 is provided inside the joint portion 11 of the main shaft 10 connected to the arm 20, when the L-shaped joint portion 42 is coupled to the main shaft 10, the L-shaped joint portion 42 is provided. The screw 41 can be screwed to the reinforcing member 12 to prevent the occurrence of defects such as cracks in the joint portion 11 where stress is concentrated, thereby extending the product life.

  Moreover, since the cross-sectional shape of the stirring blade 30 is U-shaped, the thickness of the stirring blade 30 can be reduced as compared with the conventional shape, and the shape of the stirring blade 30 is 100 mm wide, flange portion 25 mm, plate thickness. Even in the case of 6 mm, the bending rigidity of the stirring blade 30 can be secured to the same level as that of a conventional product molded from synthetic wood.

Second embodiment:
A stirrer according to the second embodiment of the present invention is a rapid stirrer (mixer) for adding a flocculant and chemicals such as a sterilizing agent, an oxidizing agent, and an alkaline agent to a mixing pond and mixing them rapidly and uniformly. However, unlike the first embodiment, a portion having no arm and having a different configuration will be mainly described below.

  The rapid stirrer 1 according to the present invention includes a main shaft 10 and a stirring blade 30 as shown in FIG.

  The main shaft 10 has a cylindrical shape and is formed of glass fiber reinforced plastic containing carbon fibers.

  The stirring blade 30 is formed of a disk portion 31 coupled to the end of the main shaft 10 and a blade portion 32 attached to the periphery of the disk portion 31, and the material is the same as that of the main shaft 10 and is reinforced with glass fibers containing carbon fibers. It is plastic.

  As shown in FIGS. 9 to 11, the rapid stirrer 1 having the above-described configuration is such that the main shaft 10 and the stirring blade 30 are all the same material, and the carbon fiber is at least 5 to 30% of the fiber volume ratio of 30 to 60%. Since it is formed of glass fiber reinforced plastic containing 20% carbon fiber, the product weight of the rapid stirrer 1 is about 70 compared to the conventional product in which the main shaft and the stirring blade are formed of iron or stainless steel. % Can be reduced. Therefore, transportation, loading / unloading, and installation work can be easily performed, and the cost for the installation work can be reduced.

  Further, since the glass fiber reinforced plastic with carbon fiber is used, rust does not occur, so that the coating on the main shaft 10 and the stirring blade 30 is not required for improving the corrosion resistance, and the maintenance management can be facilitated.

  In the first and second embodiments, the case where the main shaft 10 and the arm 20 are provided and the arm 20 and the stirring blade 30 are all formed of glass fiber reinforced plastic containing carbon fiber has been described. However, when only the main shaft 10 is made of glass fiber reinforced plastic containing carbon fiber, the weight of the main shaft 10 can be reduced by 55%. When only the arm 20 is made of glass fiber reinforced plastic containing carbon fiber, The weight of the arm 20 can be reduced by 40%. In addition, if only the stirring blade 30 is made of glass fiber reinforced plastic with carbon fiber in a slow speed stirrer, the weight cannot be reduced compared to the conventional product molded from synthetic wood, but no paint is required and maintenance is maintained. Can be facilitated.

It is a schematic explanatory drawing of the slow stirrer which concerns on 1st Embodiment of this invention. It is an expanded sectional view in the position of A of FIG. It is sectional drawing cut | disconnected in the position of BB of FIG. It is a schematic explanatory drawing of the rapid stirrer which concerns on 2nd Embodiment of this invention. It is a performance comparison table of the slow agitator concerning the present invention. It is a performance comparison table of the main shaft which is a component of the slow agitator according to the present invention. It is a performance comparison table | surface of the arm which is components of the slow stirrer which concerns on this invention. It is a performance comparison table | surface of the stirring blade which is components of the slow stirrer which concerns on this invention. It is a performance comparison table | surface of the rapid stirrer which concerns on this invention. It is a performance comparison table | surface of the main axis | shaft which is components of the rapid stirrer which concerns on this invention. It is a performance comparison table | surface of the stirring blade which is components of the rapid stirrer which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirrer 10 Main shaft 11 Joint part 12 Reinforcement material 20 Arm 30 Stirrer blade 31 Disc part 32 Blade part 40 Bearing part 41 Screw 42 L-shaped coupling part

Claims (5)

In a stirrer comprising a main shaft used in a water treatment facility, an arm connected to the main shaft, and a stirring blade connected to the arm,
A stirrer using a glass fiber reinforced plastic containing carbon fiber as at least one of the main shaft, the arm, and the stirring blade. In a stirrer comprising a main shaft used in a water treatment facility, and a stirring blade connected to the main shaft,
A stirrer characterized in that a glass fiber reinforced plastic containing carbon fiber is used for at least one of the main shaft and the stirring blade.   The stirrer according to claim 1, wherein a reinforcing material is provided inside a joint portion of the main shaft connected to the arm.   The stirrer according to any one of claims 1 to 3, wherein a cross-sectional shape of the stirring blade is a U-shape. The stirrer according to any one of claims 1 to 4, wherein the glass fiber reinforced plastic containing carbon fibers contains carbon fibers in at least 5 to 20% of a fiber volume ratio of 30 to 60%. .

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