CN201218237Y

CN201218237Y - Liquid guiding apparatus for rear suction type plastic pump

Info

Publication number: CN201218237Y
Application number: CNU2008200244345U
Authority: CN
Inventors: 唐铃凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-17
Filing date: 2008-06-17
Publication date: 2009-04-08
Anticipated expiration: 2018-06-17

Abstract

The utility model relates to a liquid-guiding device of a rear-suction type plastic pump. The external appearance of the device is a cylinder, a through hole is arranged at the middle part of the cylinder, a cavity is arranged around the through hole, an inlet which is communicated with the cavity is arranged on the cylinder, and both medial surfaces of the cavity are helical surfaces. The liquid-guiding device is arranged on the rotating shaft of the rear-suction type plastic pump through the through hole arranged at the middle part of the cylinder and is positioned at the inlet of the pump; liquid which enters via the rear-suction type plastic pump can be smoothly guided to the inlet of a vane wheel through the helical surfaces of the cavity of the liquid-guiding device. The utility model has the advantages that the structure is reasonable, the performance is reliable, the liquid can be reasonably driven, the energy loss of the liquid at the inlet can be well-reduced and the service life of the pump can be prolonged.

Description

The liquid guides of back suction formula plastic pump

Technical field

The utility model relates to a kind of liquid guides of plastic pump, specifically a kind of liquid guides of back suction formula plastic pump.

Background technique

The disadvantage of common plastics pump is the leakage problem of mechanical seal, and a lot of for this reason producers make an issue of in this respect, improve the performance of mechanical seal from different perspectives, reach and do not leak or few the leakage, prolong the pump purpose in working life, be under the high pressure situation but work as mechanical seal, the life-span is shorter.For alleviating the pressure at sealing position, at present, some producer utilizes the import negative pressure to alleviate the pressure at sealing position the import postposition of pump, yet the greatest problem of import rear-mounted pump is the energy loss of import liquid and import liquid causes axle or axle sleeve to washing away of axle wearing and tearing.

The model utility content

The purpose of this utility model is to provide a kind of liquid guides of back suction formula plastic pump, and it is loaded in the rotating shaft of back suction formula plastic pump, the liquid of collecting can be imported to the inlet of impeller, reduces the entrance loss of liquid.

For achieving the above object, the utility model adopts following scheme: the liquid guides of back suction formula plastic pump, its profile is a cylindrical body, have a through hole at cylindrical middle part, around through hole, have a cavity, have an import that communicates with cavity on cylindrical body, two inner side surfaces of cavity are helicoid.The through hole of this liquid guides by its middle part is contained in the rotating shaft of back suction formula plastic pump and is positioned at the inlet of pump.

By such scheme as seen, the liquid that is entered by back suction formula plastic pump import can be imported to the inlet of impeller smoothly by the helicoid of the cavity of this liquid guides, has reduced the liquid-inlet loss.

Rational in infrastructure, the reliable performance of the utility model, it is contained in the rotating shaft of back suction formula plastic pump, and the rationality of guiding liquids is good, can well reduce the energy loss of import liquid, improves the working life of pump.

Description of drawings

Fig. 1 the utility model one embodiment's structural representation;

The A-A sectional view of Fig. 2 Fig. 1;

The mounting point schematic representation of Fig. 3 the utility model on back suction formula plastic pump.

Embodiment

Further specify the utility model below in conjunction with embodiment and accompanying drawing.

Referring to Fig. 1, Fig. 2, the profile of the liquid guides of this back suction formula plastic pump is a cylindrical body 4, has a through hole 1 at cylindrical middle part, has a cavity 2 around through hole 1, have an import 3 that communicates with cavity 2 on cylindrical body, two inner side surfaces of cavity 3 are helicoid.

Referring to Fig. 1, liquid flows after entering cavity by import 3 in the counterclockwise direction.

Referring to Fig. 2, the bottom of two inner side surface B, the C of cavity 2 is smooth linking.

Referring to Fig. 3, the through hole of the utility model 4 by its middle part is contained in the rotating shaft 5 of back suction formula plastic pump and is positioned at the inlet of pump.

In conjunction with Fig. 2, Fig. 3 as seen, after the import of the liquid that is entered by the plastic pump import by this liquid guides entered cavity, the helicoid that passes through can be imported to import 6 places of impeller smoothly.

Claims

1, the liquid guides of back suction formula plastic pump, it is characterized in that: its profile is a cylindrical body (4), have a through hole (1) at the middle part of cylindrical body (4), around through hole (1), have a cavity (2), have an import (3) that communicates with cavity (2) on cylindrical body, two inner side surfaces of cavity (2) are helicoid.

2, the liquid guides of back suction formula plastic pump according to claim 1, it is characterized in that: the bottom of two inner side surfaces of cavity (2) is smooth linking.