CN2381817Y

CN2381817Y - Sandy water pump

Info

Publication number: CN2381817Y
Application number: CN 99225903
Authority: CN
Inventors: 王庆武
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-11
Filing date: 1999-03-11
Publication date: 2000-06-07
Anticipated expiration: 2009-03-11

Abstract

The utility model relates to a water pump for sand elimination. The utility model is characterized in that the inner surface of the peripheral wall of a pump body is provided with a helical groove, and the inner surface which is contained by a convex curve in the sectional view of the peripheral wall of the pump body is provided with the helical groove by preference. The utility model has the advantages that the helical groove can cause water and sand grains in water to generate axial component velocity, the water and the sand grains in water are led to flow into the effluent flow passages of the pump body, the loss of impact and vortex flow can be reduced, and efficiency is improved.

Description

Sand-discharging water pump

The utility model relates to a kind of sand-discharging water pump.This water pump is applicable to carries sand-discharging water pump or the transh pump that contains solid abrasive particles in the liquid, and it is husky to be particularly useful for Under Water Pumps, submersible pump or the well pump row that draws water.

Existing Under Water Pumps, submersible pump or well pump, in order to discharge solid unobstructedly, its pump housing delivery chamber all is annular.Especially, the pump housing delivery chamber of well pump or submersible pump is a complete ring, and its pump housing perisporium internal surface is the cylndrical surface.Also once retrieving pump housing perisporium internal surface is conical surface at subrange.The pump housing of this pump has outlet passage in the side.Therefore, its efficient is lower than the clean waterpump with common voluted type delivery chamber.In addition, when containing the liquid of solid abrasive particles with water pump conveying with ring delivery chamber, work as solid abrasive particles, after flowing to impeller as grains of sand etc. with liquid, under the effect of inertial force, the grains of sand at first are flushed on the back shroud of impeller, again along back shroud from impeller outlet directive pump housing perisporium, impact vee-cut at pump housing perisporium internal surface.In case vee-cut occurs, just can retain the grains of sand of high-speed slide in the groove and groove is deepened rapidly.Therefore, the pump housing can be worn out early.

The purpose of this utility model provides a kind of sand-discharging water pump, its pump housing perisporium internal surface geometrical shape can make liquid stream and solid abrasive particles produce axial component velocity, can make solid abrasive particles path in accordance with regulations enter pump housing outlet passage, has pilot flow direction, reduce the ability of impacting the vortex flow loss, thereby improve the efficient of sand-discharging water pump.

The technological scheme that the utility model adopted is to leave spiral grooves (6) on pump housing perisporium (8) internal surface of sand-discharging water pump, and the direction that the spiral of spiral grooves (6) rises is to rise to the epipleural that has pump housing outlet passage (1) (5) from pump housing lower side panel (2).The pump housing outlet passage of being opened on the outlet of spiral grooves (6) and the epipleural (5) (1) communicates.

The internal surface of pump housing perisporium (8) convex curve (7) preferably in sectional view.The intersection point (12) of this convex curve (7) and epipleural (5) internal surface arrives the distance of pump shaft line (10) greater than the convex curve (7) and the intersection point (11 ') of lower side panel (2) internal surface to the distance of pump shaft line (10).Said spiral grooves is opened on the internal surface of the pump housing perisporium (8) that convex curve (7) is contained.

Technique scheme is to leave spiral grooves on pump housing perisporium internal surface.This spiral grooves, particularly spiral grooves (6) are opened on the internal surface of the pump housing perisporium (8) that convex curve (7) is contained.This spiral grooves has the effect that makes liquid and solid abrasive particles produce axial component velocity, and the solid abrasive particles in can guided liquid-flow flows to pump housing outlet passage, can reduce eddy current loss, thereby can improve the efficient of water pump.

The utility model has the advantages that simple in structure, easy to manufacture, satisfactory for result.Pump housing perisporium internal surface geometrical shape can make the grains of sand enter pump housing outlet passage in the path in accordance with regulations, and it is husky not only can be used for the row of drawing water, and can increase the service life and can be energy-conservation.

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 1: a kind of embodiment's of the utility model sand-discharging water pump pump housing schematic perspective view.

Fig. 2: a kind of embodiment's of the utility model sand-discharging water pump generalized section.

Fig. 1 removes upper cover plate (5) and removes pump shaft (4) and impeller (13) pump housing schematic perspective view afterwards at the A-A section according to sand-discharging water pump shown in Figure 2.The rise direction of spiral grooves in Fig. 1 and Fig. 2 (6) is that starting point (11) spiral on lower side panel (2) rises, and stops to terminal point (12).Be pump housing outlet passage on the terminal point (12).Terminal point (12) is at epipleural (5) internal surface place.Spiral grooves (6) outlet communicates with pump housing outlet passage (1).

Among Fig. 2, the internal surface of pump housing perisporium (8) is convex curve (7) in sectional view, and convex curve (7) has intersection point (11 ') with lower side panel (2) internal surface, and convex curve (7) has intersection point (12) with epipleural (5) internal surface.Intersection point (12) is bigger to the distance of pump shaft line (10) than intersection point (11 ') to the distance of pump shaft line (10).Said spiral grooves (6) is just opened on the internal surface of the pump housing perisporium (8) that convex curve (7) is contained.In the present embodiment, connecting the straight line (16) of intersection point (12) and intersection point (11 ') and the angle of epipleural (5) is 55 °, convex curve (7) between intersection point (12) and the intersection point (11 ') is that one section central angle is 22 ° a circular arc, the lead angle of spiral grooves (6) is 6.5 °, the degree of depth 7mm of spiral grooves (6), and open straightly by the flute surfaces of lower side panel (2) one sides spiral grooves and parallel with lower side panel (2) approx, open to such an extent that opening spacious and slightly protruding by the flute surfaces of epipleural (5) one sides spiral grooves, in sectional view, the angle of innermost point of groove and two intersection points of groove on convex curve (7) can be 110 °, preferably the wedge angle that groove is gone up the intersection point place of leaning on epipleural (5) one sides at convex curve (7) falls into fillet, and the flute surfaces of this side and convex curve (7) are connected smoothly.Certainly, the internal surface of pump housing perisporium (8) is at this moment intuitively looked, and the pump housing that is referred to as to have spiral terrace also is right.

Claims

1, a kind of sand-discharging water pump, it comprises the pump housing (9), pump shaft (4) and impeller (13), its impeller (13) comprises front shroud (15), back shroud (14) and blade (3), its pump housing (9) comprises epipleural (5), lower side panel (2) and perisporium (8), it is characterized in that having spiral grooves (6) on the internal surface of pump housing perisporium (8).

2, sand-discharging water pump as claimed in claim 1, the internal surface that it is characterized in that described pump housing perisporium (8) is convex curve (7) in sectional view, greater than the intersection point (11 ') of convex curve (7) and lower side panel (2) the internal surface distance to pump shaft line (10), open on the internal surface of the pump housing perisporium (8) that convex curve (7) is contained by said spiral grooves (6) to the distance of pump shaft line (10) for the intersection point (12) of convex curve (7) and epipleural (5) internal surface.