CN2193942Y

CN2193942Y - Self-priming centrifugal pump

Info

Publication number: CN2193942Y
Application number: CN 94215244
Authority: CN
Inventors: 金朝铭; 张守礼; 陈卓如; 苏尔皇
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 1994-06-25
Filing date: 1994-06-25
Publication date: 1995-04-05
Anticipated expiration: 2004-06-25

Abstract

The utility model relates to a self-priming centrifugal pump, which needs no additional bottom valve of the water inlet pipe, and no water is needed to fill when the self-priming centrifugal pump is started repeatedly; the self-priming centrifugal pump which can start with pressure under the specified lift can replace the existing system with pumps copiously running under the well, which relieves the working intensity of the pump managing persons and saves energy. The lowest point [M] of the crossing point of the water inlet section and the inner chamber of the utility model is relatively 28 mm higher than the shaft center [1], and the nose end of the water outlet cooker casing of the water outlet section is provided with a similarity wedge-shaped inserting block [4]; the position of the cooker casing [5] near the circumference of phi 119 mm position is provided with three cylindrical flow-blocking and water-rowing blocks [8], [9] and [10], and the height of the blocks is 10 millimeters, and the angle is 90 DEG.

Description

Self-priming centrifugal pump

The utility model relates to a kind of pump technology.

The centrifugal pump and the segmental centrifugal pump of domestic production at present are general service pump, can satisfy requirements such as various flows, lift, are widely used in industry, the agricultural production.But these several pumps do not have suction capacity, essential water filling before starting, and at suction sleeve ingress installation bottom valve, annotated diversion to prevent and miss.When being used for some occasion, for example in the mine during discharge conduit water burst because inclement condition, and need frequently to move, during frequent starting, present centrifugal pump can not meet the demands.Therefore, existing well adopts segmental centrifugal pump to drive the drainage system of Jet injector down mostly.This system effectiveness is extremely low, a large amount of losses the energy.

Existing self-priming centrifugal pump is single-stage pump, its parameter and performance can not satisfy the operating conditions of down-hole, and existing self-priming pump all can't resolve the difficult problem of " band is pressed and started ", " band press start " is meant to bear in the outlet conduit at the pump discharge place and opens pump under the hydraulic pressure, this just mine and similar applications to the specific (special) requirements of pump.

The purpose of this utility model is to propose a kind of have suction capacity, the sectional type self-priming centrifugal pump that just can start repeatedly after a small amount of air-breathing water of promptly disposable injection.

The utility model is made up of inlet segment, stage casing, water exit end and moisture trap.Elaborate principle of the present utility model and structure below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4.

(1) inlet segment 2 is cast by HT-4 wear resisting cast iron one, as shown in Figure 1.Water intake and the crossing minimum point M and revolution 1 relative higher 28mm position, axle center of inner chamber.This has highly guaranteed after pump shuts down, and under any circumstance all can keep about 4 premium on currency, quotes water during for self-priming.Simultaneously, it guarantees that upper impellers at different levels all leave 4～5mm gap when termination of pumping, to discharge the surplus water in the air-water separation gas.

(2) water exit end 3 is cast by HT-4 wear resisting cast iron one, as shown in Figure 2.What water outlet crucible shell nose was equipped with a wedge like inserts 4, and shell 5 is by circumference φ 119mm position three cylindrical baffles of installing

piece

8,9,10 of striking, and dog height is 10mm, at a distance of 90 ° of angles.

(3) moisture trap as shown in Figure 3, is made up of three parts: rectangle separation chamber 11, outlet(discharge) flange 12, standard latus rectum 450mm; Be connected ground " 8 " font flange 13 with water exit end, macropore φ 60mm, aperture φ 30mm, the weldering of three parts is associated in together.

The utlity model has following advantage:

(1) can self-priming, can start repeatedly after a small amount of air-breathing water of disposable injection.

(2) can be with pressure to start, the pump of producing at present by designing requirement can normally start under the pressure that exports band 0.7MPa.And the self-priming pump of front and back can not be with the pressure startup maybe must exit with manually operated valve.

(3) energy saving, easy and simple to handle has alleviated operator's labor intensity.

Fig. 1 is the utility model inlet segment plan view

Fig. 2 is the utility model water exit end plan view

Fig. 3 is the utility model air-water separation chamber plan view

Fig. 4 is that the A of the utility model Fig. 3 is to view

Embodiment: the utility model is used at Shuangyashan Mining Administration four Fen Tai ore deposits, 4 well water pumping plants, require to use motor 8KM under the situation satisfying to draw water equally, and when using other pump originally, motor is 75KM.

Claims

1, a kind of sectional type self-priming centrifugal pump comprises inlet segment, stage casing, water exit end and moisture trap, it is characterized in that:

(1) water intake of inlet segment and the crossing minimum point [M] and revolution relative higher 28mm position, axle center of inner chamber.

(2) the water outlet spiral case nose of water exit end [4] spiral case [5] of inserting that a wedge like is housed is equipped with three cylindrical baffles strike piece [8], [9], [10] by circumference φ 119mm position, and dog height is 10mm, at a distance of 90 ° of angles.