JP2003262194A - Grinder pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinder pump device capable of reducing the residual water quantity inside of a sewage tank and while effectively preventing the occurrence of clogging inside of a piping. <P>SOLUTION: This grinder pump device 1 is provided with a rotary blade 14 and a fixed blade 15 in a suction passage 10 thereof, and discharges the sewage through a discharge port 12, while cutting materials to be cut such as cloth and plastics included in the sewage sucked through the suction port 16 in cooperation of the rotary blade 14 and the fixed blade 15 with each other. A bell-mouth type suction guide pipe 3 having the inner diameter P equal or larger to/than the inner diameter of the suction port 16 is installed in the suction port 16. The inner diameter P of the suction guide pipe 3 is formed larger than the inner diameter R of the discharge port 12. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid material such as cloth, vinyl or rubber contained in a liquid installed and stored in a sewage tank such as a domestic drainage pump unit tank or a manhole pumping station. The present invention relates to a grinder pump device that discharges a (cutting object) to a further downstream side while cutting the cut object.

[0002]

2. Description of the Related Art Conventionally, as a drainage system for sewage stored in a sewage tank such as a manhole pumping station, as disclosed in JP-A-9-235777 and JP-2995252, a bell mouth type is disclosed. There is a structure in which a submersible pump equipped with the suction guide pipe of No. 3 is arranged in the tank, and the waste water sucked through the suction guide pipe and the suction port is discharged to the downstream side through the discharge port and the discharge pipe.

Further, in such a drainage system, instead of a submersible pump which simply sucks sewage from the suction port and discharges it from the discharge port, it is disclosed in Japanese Utility Model Laid-Open No. 4-134692 and Utility Model Registration No. 2535344. As described above, a grinder pump of a type in which a fixed blade and a rotary blade cooperate to finely cut an object to be cut such as cloth or vinyl contained in wastewater and discharge the wastewater together with the wastewater is also used.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention A conventional drainage system using a submersible pump equipped with a bellmouth type suction guide tube at its suction port has an advantage of reducing the amount of residual water in a waste water tank, and The drainage method using the conventional grinder pump has an advantage that it is possible to effectively prevent clogging of the pipe due to the object to be cut contained in the sewage.

In view of the above points, an object of the present invention is to provide a grinder pump device capable of reducing the amount of residual water in the waste water tank and effectively preventing clogging of the pipe.

[0006]

[Means for Solving the Problems] A technical means for achieving the above object is to provide a fixed blade provided in a suction path with an object to be cut such as cloth or vinyl contained in a liquid sucked from a suction port. In a grinder pump device that discharges liquid from a discharge port while cutting by cooperation of a rotary blade and a rotary blade, the suction port of the bell mouth type having an inner diameter equal to or larger than the inner diameter of the suction port in the suction port. It is at the point where the tube is attached.

The suction guide tube may have an inner diameter larger than that of the discharge port.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings, as shown in FIGS.
The grinder pump device 1 includes a grinder pump body 2 and a bellmouth suction guide tube 3.

The grinder pump main body 2 includes the actual flat plate 4
-134692 gazette, utility model registration No. 2535344
As disclosed in Japanese Patent Laid-Open Publication No. 2003-242242, as in the prior art, a motor housing, an oil housing 5, and a pump housing 6 are sequentially provided from the upper side downward, and a motor having a rotor and a stator is arranged in the motor housing. A cable for supplying electric power to the motor is wired and connected from the upper wall side of the motor housing.

The rotary drive shaft 7 of the motor is axially supported by the motor housing and the oil housing 5 with bearings in the up-down direction, and its lower end is projected toward the pump housing 6 side. . Further, the oil housing 5 is filled with oil, and a mechanical seal seals against the intrusion of liquid from the pump housing 6 side.

A circular hole-shaped suction passage 10 is provided in the center of the lower surface side of the pump housing 6, and a discharge passage 11 is provided on one side of the circumferential surface of the pump housing 6, and the discharge passage 11 has a discharge end. A discharge pipe is appropriately connected to the outlet 12.

The suction passage 10 and the rotary drive shaft 7 of the motor are vertically aligned with each other in the vertical direction. The spiral drive impeller 13 and the impeller 13 at the lower end of the rotary drive shaft 7 projecting toward the pump housing 6 are provided. The rotary blade 14 is integrally attached and fixed. That is, the rotary blade 14 is press-fitted in the impeller 13 concentrically and integrally fixed thereto, and the rotary drive shaft 7 is integrally attached and fixed to the integrated impeller 13 and rotary blade 14 through screw fastening. Has been done. And the rotary blade 14 is the suction passage 1
0, and an impeller 13 is arranged in the pump housing 6 above the suction passage 10.

A fixed blade 15 having a cylindrical body structure is detachably attached and fixed to the suction passage 10 so as to face the rotary blade 14 radially outward with a slight gap. On the inner peripheral surface of the fixed blade 15, a large number of vertical groove portions 15a are formed to be separated from each other in the circumferential direction so as to form a blade portion, and the blade portion of the fixed blade 15 and the blade portion of the rotary blade 14 are separated from each other. The structure is configured to cut an object to be cut such as cloth or vinyl contained in the liquid by the cooperation of.

The suction port 16 located below the fixed blade 15 in the suction passage 10 is formed in a tapered shape whose diameter gradually increases in the opening end direction.

The rotary blade 14 is arranged so as to project toward the suction port 16 slightly below the fixed blade 15.

The suction guide tube 3 has a bellmouth type guide tube main body 3a having an appropriate length in the vertical direction and having a diameter expanded at the lower end, and a substantially triangular mounting attached to the upper end by welding or the like. Consists of flange part 3b and suction port 1
The mounting flange portion 3b is detachably mounted and fixed to the mounting seat 6a formed on the peripheral edge of the sheet 6 through the packing 17 by screw fastening.

At this time, as shown in FIG. 3, the inner diameter P of the suction guide tube 3 is the same as or slightly larger than the inner diameter Q of the opening end of the suction port 16. and again,
The inner diameter P of the suction guide tube 3 is larger than the inner diameter R of the discharge port 12. For example, in the present embodiment, the discharge port 12 is the grinder pump main body 2 having an inner diameter R of 32 A, and the suction guide tube 3 attached to the suction port 16 has an inner diameter P of 80 mm. Further, the inner diameter Q at the opening end of the suction port 16 is also about 80 mm. The outer diameter S of the rotary blade 14 is 52 mm.

This embodiment is configured as described above, and is disclosed in the above-mentioned Japanese Patent Laid-Open No. 9-235777 and Japanese Patent No. 299.
As disclosed in Japanese Patent No. 5252 and the like, the grinder pump device 1 is used by being disposed in a domestic wastewater pump unit tank, a manhole pump station, or another dirty water tank.

By the operation of the grinder pump device 1, the dirty water sucked through the suction guide pipe 3 and the suction passage 10 is discharged downstream through the discharge passage 11 and the discharge pipe connected to the discharge port 12.

Further, the material to be cut such as cloth and vinyl contained in the dirty water is finely cut by the cooperation of the rotary blade 14 and the fixed blade 15 and discharged together with the dirty water.

Therefore, by using the grinder pump device 1 equipped with the suction guide tube 3, the amount of residual water in the waste water tank can be reduced, and clogging in the pipe due to solid matter such as cloth or vinyl contained in the waste water can be prevented. It can be effectively prevented.

In general, the suction guide tube attached to the suction port of the submersible pump is sufficient if it has the same size as the passage particle size of the pump, and the passage particle size of the pump is 65 to 100% of the discharge port diameter. Therefore, there is no need to install a suction guide tube with an inner diameter larger than the inner diameter of the discharge port.In a conventional submersible pump equipped with a bellmouth type suction guide tube, the inner diameter of the suction guide tube is usually And the inner diameter of the discharge port are the same. On the other hand, in the present embodiment, the inner diameter R of the discharge port 12 is
Since the inner diameter P of the suction guide tube 3 is configured to be larger than that of the suction guide tube 3, the flow rate of the dirty water sucked through the suction guide tube 3 can be slowed down, and the sand or metal that has settled at the bottom of the tank can be sucked in. The wear of the rotary blade 14 and the fixed blade 15 due to these can be effectively reduced, the life of the rotary blade 14 and the fixed blade 15 can be extended, and the maintenance cost can be reduced.

Further, in the present embodiment, since the inner diameter P of the suction guide tube 3 is set to be about 1.5 times or more the outer diameter S of the rotary blade 14, the cut object such as cloth or vinyl is cut. At the time of cutting, a rolling space for cutting the cut object is secured around the rotary blade 14, and the cut object has a structure in which it gradually cuts while rolling, and the crushing performance of the cut object is also secured well. it can.

Further, by slowing the flow rate of the dirty water sucked through the suction guide tube 3 as described above, from the viewpoint of extending the life of the rotary blade 14 and the fixed blade 15, the number of poles of the motor is set to 2 poles. Instead, a low-speed motor using four poles may be used. At this time, as shown in FIG. 1 and FIG. 3, the rotary blade 14 is protruded from the fixed blade 15 toward the suction port 16 by an appropriate distance to ensure the rolling property of the cut object, thereby ensuring the rolling property of the cut object. It is also possible to obtain excellent crushing performance. The protruding length of the rotary blade 14 may be appropriately determined as needed. The adoption of a 4-pole motor in the grinder pump body 2 results in low-speed rotation, cavitation does not occur, and it can be used in a region that cannot be used in the grinder pump body 2 using a 2-pole motor. Can be improved.

In the above-described embodiment, the grinder pump device 1 having the structure in which the inner diameter P of the suction guide tube 3 is 1.5 to 1.6 times the outer diameter S of the rotary blade 14 is shown. If the outer diameter S of the blade 14 is 1.5 times or more, sufficient crushing performance and long life can be obtained.

[0026]

As described above, according to the grinder pump device of the present invention, the suction port is equipped with a bellmouth type suction guide tube having an inner diameter equal to or larger than the inner diameter of the suction port. This is advantageous in that the amount of residual water in the tank can be reduced and clogging in the pipe due to solid matter such as cloth or vinyl contained in the liquid can be effectively prevented.

Further, if the suction guide tube has a larger inner diameter, a rolling space for cutting the cut object is secured around the rotary blade when cutting the cut object such as cloth or vinyl. The object to be cut has a structure in which it is gradually cut while rolling, and there is an advantage that the crushing performance of the object to be cut can be secured well.

Further, if the inner diameter of the suction guide tube is set to be larger than the inner diameter of the discharge port, the flow rate of the dirty water sucked through the suction guide tube can be slowed down, and the suction of sedimented sand or metal is reduced. However, there is an advantage that the wear of the rotary blade and the fixed blade due to these can be effectively reduced, and the life of the rotary blade and the fixed blade can be extended.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a grinder pump device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an exploded view of a main part in FIG.

[Explanation of symbols]

1 Grinder pump device 2 Grinder pump body 3 Suction guide tube 3a Guide tube body 6 Pump housing 7 rotation drive shaft 10 Suction path 11 discharge path 12 outlets 13 impeller 14 rotary blades 15 fixed blade 16 Suction port

Claims (2)

[Claims] 1. A liquid discharge port while cutting an object to be cut such as cloth or vinyl contained in a liquid sucked from a suction port by cooperation of a fixed blade and a rotary blade provided in a suction path. A grinder pump device for discharging further, wherein a bellmouth type suction guide tube having an inner diameter equal to or larger than the inner diameter of the suction port is attached to the suction port. 2. The grinder pump device according to claim 1, wherein the suction guide tube has an inner diameter larger than an inner diameter of the discharge port.