JPH0567799B2 - - Google Patents

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.

[Prior art and its problems]

As shown in Figs. 5 and 6, a ring 5' having a number of vertically grooved fixed blades 7'...7' arranged on its inner circumferential surface, which serve as suction passages, is fitted onto the inner circumference of the pump suction port 4'. A grinder pump is known in which a crushing impeller 8' fixed below the boss of the pumping impeller 2' is fitted into the ring 5' to constitute a solid material crushing mechanism. .

In such a known grinder pump, if the groove width of the vertically grooved fixed blades 7'...7' is widened,
As the breaking pattern of the solid material becomes rougher, the pump vortex chamber 1'
In addition, if the width of the groove is narrow in order to break the solid material finely, the solid material may block the vertically grooved fixed blades 7'...7' during the cutting process. This impedes the water absorption function and causes a significant drop in pump performance.

[Purpose of the invention]

The purpose of the present invention is to break the solid material finely so as not to cause blockage in the pump vortex chamber or pumping piping, and to prevent the solid material from clogging the vertically grooved fixed blade during the cutting process. An object of the present invention is to provide a grinder pump with improved passage through a suction path.

[Structure of the invention]

In the present invention, a vertical groove shaped like a fixed blade is formed on the inner periphery of the annular guiding wall that is guided down from the center hole of the suction cover facing the lower surface of the blade plate of the pumping impeller in the pump vortex chamber. A rotating body whose outer periphery fits with the inner periphery of the annular guide wall with a slight gap is fixed below the boss of the pumping impeller, and A solid material introduction port is recessed in the lower part, and a spiral blade that winds up in the counter-rotation direction is screwed so as to face the fixed blade in a diagonal manner.

〔Example〕

In the drawings of the embodiment, 1 is a pump vortex chamber, 2 is a pump swirl chamber;
is a pumping impeller housed in the pump swirl chamber 1,
3 is a suction cover facing the lower surface of the blade plate of the pumping impeller 2, 4 is a center hole of the suction cover 3, and 5 is a center hole 4.
An annular guiding lower wall guided lower than the inner circumference 5
A large number of vertical groove-shaped suction passages 6...6 are arranged in i, and these vertical groove-shaped suction passages 6...6 and the inner periphery of the lower guide wall 5i
The vertical edges formed between the two serve as fixed blades 7...7 that face the rotating blades described later. Reference numeral 8 denotes a rotating body fixed below the boss of the pumping impeller 2 so as to rotate together with the pumping impeller 2, and the outer periphery 8o is formed to fit with the inner periphery 5i of the annular guide wall 5 with a slight gap. ing.
Solid matter inlet ports 9...9 are recessed in the lower part of the rotary body outer periphery 8o. And these solid matter inlet ports 9
... 9 is desirably formed in an upward slope so that its opening width is wider than the groove width of the vertical suction passage 6, and the recess depth is deeper toward the lower end and shallower toward the upper end. Reference numeral 11a denotes a spiral blade screwed on the outer periphery 8o of the rotary body, which is wound up in the counter-rotation direction so as to face the fixed blade 7 in an oblique manner. Controls the shredding action of solid materials through the oblique intersection of the Reference numeral 11b denotes a push-up path formed along the spiral blade 11a so as to lead from the solid material inlet 9 into the pump swirl chamber 1, and the fixed blade 7...
The diagonal intersection between the blade 7 and the spiral blade 11a serves to forcibly push up the shredded solid material.

Note that the edges of the solid material inlet ports 9...9 are fixed with the fixed blade 7.
It is also possible to form the frame-breaking blades 10...10 facing the lower part of the frame-breaking blades 10 to be used for breaking frames of hard solid materials.

[Effect]

When the pump is driven, the rotating body 8 rotates together with the pumping impeller 2, and the fixed blades 7...7 and the spiral blades 11a intersect in an oblique manner to shred the solid material. Solids are easily sucked between the annular guide wall 5 and the rotating body 8 by the solids inlet 9 provided, and the sucked solids are drawn between the fixed blades 7...7 and the spiral blade 11a. The guided and shredded solids are forced into the pump vortex chamber 1 along the push-up path 11b.

〔Effect of the invention〕

In the grinder pump of the present invention, the solid matter inlet ports 9...9 are wide opened downward, and the solid matter inlet ports 9...9 are opened widely downward, and the solid matter inlet ports 9...9 are opened widely downward, and the solid matter inlet ports 9...9 are opened widely downward, and solid matter is Since it is configured to shred solid matter mixed in water, it is easy to guide the solid matter mixed in the water between the blades, and the cutting action of the solid matter is reliably performed and the solid matter can be cut into small pieces. By discharging the finely cut solids from the discharge port 12 through the pump vortex chamber 1 together with the pumped water, it is possible to prevent the inside of the pump vortex chamber 1 and the pumping piping from being clogged with coarse solids. be.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional side view of the main part of the grinder pump of the present invention, Fig. 2 is a half sectional view of the rotating body in the grinder pump of the present invention, and Fig. 3 is a fitting between the annular guiding wall and the rotating body in the grinder pump of the present invention. Fig. 4 is an enlarged view of the longitudinal side of the main part showing the state of alignment, Fig. 4 is an enlarged view of the cross-sectional plane taken along line A-A in Fig. 1, Fig. 5 is
The figure is a vertical sectional side view of a main part of a conventional grinder pump, and FIG. 6 is an enlarged plan view of a main part of a ring in a conventional grinder pump. DESCRIPTION OF SYMBOLS 1... Pump swirl chamber, 2... Pumping vane plate, 3... Suction cover, 4... Center hole, 5... Annular guiding wall, 5i... Inner circumference, 6... Suction path, 7... Fixed blade, 8... Rotating body, 8o
...Outer periphery, 9...Solid material inlet, 11a...Spiral blade.

Claims (1)

[Scope of Claims] 1. A groove edge is formed on the inner periphery 5i of the annular guide 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 vertical groove-shaped suction passages 6 are provided in the fixed blade 7, and below the boss of the pumping impeller 2, the outer periphery 8o is slightly spaced from the inner periphery 5i of the annular guide wall 5. A rotating body 8 to be held and fitted is fixed, a solid material introduction port 9 is recessed in the lower part of the rotating body 8, and a spiral winds up in the counter-rotation direction so as to face the fixed blade 7 obliquely. A grinder pump characterized in that a blade 11a is threaded.