JPS58160590A - Vortex flow pump - Google Patents

Abstract

PURPOSE:To prevent a solid matter in dirt from blocking between an impeller and a casing, by transferring the dirt or the like while forming a vortex to the peripheral part of the casing enveloping the impeller. CONSTITUTION:An annular guide 3d protrusively formed toward the part of a blade 2b is provided to the final end part of a semicircle. Both sides of this guide 3d are formed to a curve to guide dirt sucked from a suction port 3a and dirt fed out from the periphery of an impeller 2 to flow in a transfer path 3b as shown by an arrow head P respectively toward the part of the blade 2b almost in the axial direction. While the guide 3d increases a distance between its point end and the part of the blade 2b to prevent blocking of a solid matter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vortex pump that prevents the gap between an impeller and a casing from becoming clogged with solid matter.

Since the impeller and casing of a pump are generally arranged close to each other, the pump is used for transporting filth, sludge, etc., and the six-way pump has the disadvantage that the gap between the impeller and the casing may become clogged with solid matter.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a vortex pump in which the gap between the impeller and the casing is prevented from becoming clogged with solid matter.

Embodiments of the present invention will be described below based on the drawings.

1 and 2 show a vortex pump according to the invention. In the pump shown in these figures, an impeller 2 fitted to the end of a rotating cypress 1 is surrounded by a casing 8. The impeller 2 is integrally formed with a main plate 2C and a large number of blades 2b curved forward in the rotational direction on the outer periphery of a cylindrical boss 2a. It is curved so that dirt, etc.) can be sucked in approximately in the axial direction and sent out in the radial direction. An axial suction 18- is provided at the center of the casing 8, and a tangential discharge port 8C communicating with the annular transfer path 8b and ξ is provided at the outer periphery. The transfer path 8b is formed in a substantially semicircular shape in which the electrically disconnected shape is continuous with the long line of the guide surface 2d of the main plate 20, and an annular guide 8d is formed at the terminal end of the semicircle to protrude toward the blade 2b portion. is provided. This guide 8d has curved surfaces on both sides, and guides the dirt sucked from the suction port 8& and the dirt sent out from the outer periphery of the impeller 2 and flowing through the transfer path 8b like an arrow P toward the blade 2b. It is designed to be guided in the axial direction. Further, the guide 8d has a large gap between the tip and the blade 2b to prevent solid objects from clogging the guide 8d.

According to the embodiment, as the rotating shaft 1 rotates, the suction port 8a
The filth sucked out from the filth can be transferred in the rotational direction while spiraling like an arrow P, and can be discharged from the discharge port 8C, and the vortex is pressurized while passing through the transfer path 8b with low flow resistance, resulting in high pressure. Therefore, the pump performance can be improved.

As described above, according to the present invention, an annular transfer path is provided on the outer periphery of the casing that surrounds the impeller, which transfers waste while swirling, and the distance between the impeller and the impeller is marked in red. The vortex pump is configured such that an annular guide in the axial direction is provided, and this guide guides the filth sucked from the suction port and the swirling filth to the blade portion. It is possible to prevent clogging between the casings, and to obtain a high-pressure vortex flow to improve pump performance.

[Brief explanation of the drawing]

Figure I11 is a longitudinal sectional view showing a vortex pump according to the present invention;
Figure ta2 is a cross-sectional view taken along line 1-1 in Figure 1. 2... Impeller, 2a... Boss, 2b... Vane, 2
c... Main plate, 2d... Guide surface, 8... Casing, 8a... Suction port, 8b... Transfer path, 8d... Guide.

Claims (1)

[Claims] 1) A large number of blades and a main plate are provided on the outer periphery of a cylindrical boss so that they can be drawn in approximately in the axial direction and retracted in the radial direction to form an impeller, and a guide surface for the main plate is provided on the outer periphery of a casing that surrounds the impeller. A transfer path having a substantially semicircular cross section connected to an extension line is provided in an annular shape, and at the semicircular terminal end of the transfer path, the transferred object is sucked from the suction port in the center of the casing as the impeller rotates; An annular guide is provided with a large gap between the tip and the blade, which guides the object to be transferred, which flows in the same rotational direction through the transfer path while creating a vortex, approximately in the axial direction toward the blade. Features a vortex pump.