JPS63208694A - grinder pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a grinder pump that breaks up solid matter in suction liquid and discharges it together with liquid.

As shown in FIGS. 5 and 6, a ring 5' having a plurality of vertical groove-shaped fixed blades 7I...7/ arranged on the circumferential surface, which serves as a suction path, is attached to the pump suction port 4'. A shredding impeller 8/ fitted around the circumference and rinsed under the boss of the pumping impeller 2'
A grinder pump in which a solid object shredding mechanism is constructed by fitting the ring 5I into the ring 5I is well known.

In such a known grinder pump, if the groove width of the vertically grooved fixed blades 7'...7/ is carved wide,
The shredding pattern of the solid material becomes rough, which tends to cause blockage in the pump vortex chamber 1/ and the pumping piping.In addition, if the groove width is narrowed to break the solid material finely, it becomes difficult to break the solid material during the shredding process. The solid matter blocks the vertically grooved fixed blades 7/...7/, inhibits the water absorption function, and causes a significant decrease in pump performance.

[Objective of the Invention] The object of the present invention is to break solids into small pieces so as not to cause blockages in the pump vortex chamber or pumping piping.
Moreover, it is an object of the present invention to provide a grinder pump in which the passage of the suction path is improved so that solid matter does not block the vertically grooved fixed blade during the tearing process.

[Structure of the Invention] The grinder pump according to the present invention has a suction passage formed on the circumference of the lower wall of the annular shape, which is led down from the center hole of the suction cover that faces the lower surface of the blade plate of the pumping impeller in the pump vortex chamber. A rotating body is provided with a large number of fixed blades in the form of vertical grooves, and the outer periphery is annular and fits with the circumference of the lower wall with a small gap below the boss of the pumping impeller. A rotary blade is provided on the lower part of the outer periphery of the rotating body, facing the lower part of the fixed blade, and a spiral groove is carved in the upper part thereof, facing the upper part of the fixed blade and winding up in the counter-rotation direction. has been done.

〔Example〕

In the drawings of the embodiment, 1 is a pump vortex chamber, 2 is a pumping impeller housed in the pump vortex chamber 1, 3 is a suction cover facing the lower surface of the blade plate of the pumping impeller 2, and 4 is a suction cover 3. The center hole 5 is an annular or similar lower wall led down from the center hole 4, and its circumference 5i has a large number of vertical grooves 6, which serve as suction passages.
...6 are arranged, and these vertical grooves 6...
. . 6 and the guiding lower wall circumference 5i serves as a fixed blade 7 that faces the rotating blade described later.

Reference numeral 8 denotes a rotary body fixed below the boss so as to rotate together with the pumping impeller 2, and the outer circumference 80 is annular or similar to the circumference 5 of the lower wall 5.
1 and is formed to fit with a slight gap. Then, a part of the lower part of the outer periphery of the rotating body 8 is cut out to provide a recessed chamber 9, and the vertical edge formed between the recessed cavity 9 and the outer periphery 80 of the rotating body is connected to the fixed blades 7...7. A rotary blade 10 faces the lower part in parallel, and a spiral groove 11 is formed on the upper part of the outer periphery of the rotary body 8 so that it winds up in the counter-rotation direction so as to communicate from the concave part 9 into the pump vortex chamber 1. The fixed blade 7 is engraved.
. . . Opposed to the upper part of 7 in a diagonal manner.

When the pump is driven, the rotating body 8 rotates together with the pumping impeller 2, and the solid material is broken into small pieces by the parallel intersection between the lower part of the fixed blades 7...7 and the rotary blade 10. The solid material after shredding is forcibly pushed up inside the vertical grooves 6 by the diagonal intersection of the spiral groove 11 and the fixed blades 7...7, and the pump vortex flows along with pumping water. Discharge port 1 via chamber 1
It will be discharged from 2.

〔Effect of the invention〕

According to the grinder pump of the present invention, the vertically grooved fixed blade 7
A spiral groove 11 is formed facing the upper part of 7 and winding up in the counter-rotation direction, and the solid material after being shredded is formed between the spiral groove 11 and the vertically grooved fixed blade 7 . Because it is forcibly pushed up by the diagonal intersection with 7, the vertically grooved fixed blade 7...
Even if the width of the grooves 7 is narrow, the passage of the solid material after shredding is extremely good, and there is no possibility that the vertically grooved fixed blades 7 will become clogged. Therefore, in order to finely break the solid matter, the groove width of the vertically grooved fixed blades 7 is formed to be narrow, and the finely broken solid matter is pumped together with water into the pump vortex chamber. By discharging from the discharge port 12 through the inside of the pump vortex chamber 1 and the water pumping pipe, it is possible to prevent the inside of the pump vortex chamber 1 and the water pumping pipe from being clogged with coarse solid matter.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of the essential parts of the grinder pump of the present invention;
FIG. 2 is a half cross-sectional view of the rotating body in the grinder pump of the present invention, FIG. 3 is an enlarged longitudinal sectional side view of the main part showing the fitted state of the annular lower wall and the rotating body in the grinder pump of the present invention, and FIG. The figure is an enlarged cross-sectional view taken along the line A-A in Fig. 1, Fig. 5 is a vertical sectional side view of the main part of a conventional grinder pump, and Fig. 6 is an enlarged plan view of the main part of the ring in the conventional grinder pump. . 1... Pump swirl chamber, 2... Lifting vane plate, 3... Suction cover, 4... Center hole, 5... Annular Equal lower wall, 51...circumference,
7...Fixed blade, 8...Rotating body, 80.
...Outer circumference, 10...Rotary blade, 11...
...Spiral groove. Patent applicant: Tsurumi Seisakusho Co., Ltd., 17] Σ 'IF, 711 Odazu no O

Claims (1)

[Claims] Circumference (5i) of the annular guiding wall (5) guided down from the center hole (4) of the suction cover (3) facing the lower surface of the blade plate of the pumping impeller (2) in the pump swirl chamber (1) A large number of vertically grooved fixed blades (7) (7) are arranged to serve as suction passages, and an outer periphery (8o) is provided below the boss of the pumping impeller (2).
fixes a rotating body (8) formed to fit with the circumference (5i) of the annular guiding wall (5) with a slight gap;
A rotary blade (10) facing the lower part of the fixed blade (7) is provided on the lower part of the outer periphery of the rotating body (8), and the fixed blade (7) is provided in the upper part of the rotating body (8).・・・・・・(
7) A spiral groove (1
A grinder pump characterized by having 1) engraved thereon.