JPS63176684A - Screw pump - Google Patents

Abstract

PURPOSE:To enhance feed efficiency of fluid, by providing a helical groove, in which a blade of a screw in a pump outer cylinder is placed, in a partitioning screw and meshing it with the screw in the pump outer cylinder. CONSTITUTION:A screw 2, which feeds an object, is provided so as to be turned in a pump outer cylinder 1, and said screw 2 is meshed with a partitioning screw 6 having a helical groove 6a in which a blade 2a of said screw 2 is placed. Shafts 4, 7 of the screws 2, 6 are rotated by a motor 10 in an equal speed in an opposite direction to each other. Here the helical groove 6a slides on the blade 2a scraping the forced press fed object adhering to the blade 2a. Accordingly, fluid, even if it provides a viscous quality, can be efficiently fed by a screw pump.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a screw pump, and more particularly to a screw pump capable of pumping a sticky fluid such as concrete, earth and sand, clay, or starch syrup, or a sticky substance such as koji. 1 Regarding summer knee pumps.

[Conventional technology]

Screw pumps, which consist of spirally extending rotary blades, can transport fluid continuously and efficiently, but when concrete, sticky fluid, or sticky objects are pumped, they become clogged between the rotary blades and cause damage inside the pump cylinder. It rotates in unison with the rotor blade, and if it is not fed properly, it will become clogged. For this reason, the inventor of the present application disclosed in Japanese Patent Application No. 61-190051 that a screw 2 is provided in the pump outer cylinder 1 for rotation as shown in Figure 3, and a vertical screw 2 is provided on the inner circumferential surface of the outer cylinder 1 to extend in the axial direction. A groove 3 is provided, and within this vertical groove 3, a partition plate 5 that closes between the central shaft 4 and the adjacent blades 2a and 2b of the screw 2 is provided to slide in the axial direction, so that the screw 2 and the central shaft 4 rotate. Then, the partition plates 5, 5, . . . are pushed by the screw 2 and slide in the longitudinal groove 3 in the axial direction, thereby scraping off the pressurized material adhering to the screw 2.

In FIG. 3, 10 is a motor, 11 is an inlet hopper, and 12 is an outlet. The inlet and outlet ends of the vertical groove 3 are through holes 3
a and 3b, and the partition plate 5 that has fallen through the exit hole 3b is inserted through the entrance hole 3a.

[Problem that the invention seeks to solve]

However, this conventional one has a partition plate of 5.5...
・The structure was complicated because it had to slide in the axial direction.

The present invention eliminates this drawback by meshing a partitioning screw with the screw 2 for feeding the object.

[Means for solving problems]

In the present invention, a screw 2 for feeding an object into a pump outer cylinder 1 is provided to rotate, and this screw 2 has wings 2a thereof.
This is a screw pump formed by meshing a partitioning screw 6 having a spiral groove 6a into which the screws 2 and 6 rotate in opposite directions.
The blade a slides on the blade 2a and sprinkles off the material to be fed under pressure that has adhered thereto.

〔Example〕

In FIG. 1, reference numeral 18 denotes a portion surrounding the screw 6 provided in the pump outer cylinder 1, and the shafts 4.7 of the screws 2 and 6 are driven by the motor 10 so as to rotate at the same speed in opposite directions.

Airtightness can be maintained by making the cross-sectional shapes of the blades 2a and the spiral grooves 6a the same as the teeth of a gear without backlash. Further, the screw 6 may be made of a flexible elastic material such as rubber.

〔Effect of the invention〕

According to the present invention, even sticky fluids such as concrete, earth and sand, clay, or starch syrup, or sticky objects such as koji can be efficiently and reliably fed with a screw pump, and the structure is simple and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a longitudinal sectional view of a conventional device. 1... Outer cylinder, 2... Screw, 2a
...Wing, 6a...Spiral groove, 6...
...Screw for partition.

Claims (1)

[Claims] A screw pump comprising a rotating screw for feeding an object into the pump outer cylinder, and a partition screw meshed with the screw, which has a spiral groove into which the blades of the screw fit.