CN2299950Y - Submersible electric screw pump - Google Patents

Abstract

The utility model discloses a submersible electric screw pump with sand prevention structure. The rubber stator of the inner cavity of the pressure outlet chamber of the original screw electric pump is covered with a sand prevention sleeve with the cap-shaped structure. The cap top of the sand prevention sleeve is provided with a hanging edge. The utility model solves the phenomenon that after original submersible electric screw pump is stopped, the sandstone reversely flows into the rubber stator to cause wearing, and the electric motor is blocked and is burnt out. The utility model has the advantages of simple structure.

Description

Keep away husky diving screw rod electric pump

The utility model belongs to the pump technology field, relates in particular to the improvement to the diving screw rod electric pump.

Screw rod electric pump is to utilize the motor driving screw rod to rotate as planet in elastomer stator to carry liquid.Existing diving screw rod electric pump is owing to be operated in the higher underwater operation of sand content, and certain grains of sand are contained in the outlet pipe or outlet pipe upper end.When shutdown, the grains of sand that outlet pipe is interior or effluent pipe mouth is outer will be instantaneous sucked back to delivery chamber, perhaps make the grains of sand slowly be deposited to delivery chamber owing to leaking, cause and be easy to pile up the grains of sand in the elastomer stator, light then can destroy potted line between screw rod and the elastomer stator, cause flow to reduce, efficient reduces, heavy then stuck screw rod and elastomer stator and cause motor rotation blockage.China utility model patent 95225199X, March 19 1997 notice of authorization day, a kind of " sand prevention diving screw rod electric pump " patent document by name discloses a kind of sand prevention diving screw rod electric pump, mention above the rubber of delivery chamber inner chamber gives surely, be covered with the anti-sand sleeve that an elastic material is made, play the one-way valve effect, during work, the flat hydraulic pressure that sews at anti-sand sleeve top is washed into round mouth open, when shutdown, the anti-sand sleeve top is sealed automatically, and sand and elastomer stator are separated, and prevents that husky the refluence from entering into the effect of elastomer stator thereby play.This structure, anti-sand sleeve is higher for material requirements, and when particularly the operating time was longer, because anti-sand sleeve is in elevated pressures, distortion was big, causes fatigue easily, and makes anti-sand sleeve damage easily, needed in time to change.

The purpose of this utility model provides that a kind of to keep away husky performance good, simple in structure, can keep the diving screw rod electric pump in long prolonged water pump working life of keeping away husky effect again.

The technical solution of the utility model is: keep the screw pump existing structure, promptly connect delivery chamber, water outlet joint on the pump housing successively, motor, screw rod, elastomer stator are arranged in the pump housing, be characterized in: extrude in the chamber, keep away husky cover with one and cover on the elastomer stator.

Above-mentioned to keep away husky cover be hat-shaped structure, and crown has the extension edge, has several osculums on the cap waist.

According to the disclosed technology of the utility model, owing to keep away husky cover is that crown has the hat-shaped structure of hanging the edge, when shutdown, the grains of sand are generally hung along the bottom that is deposited to cap and can not entered into potted line between elastomer stator and the screw rod by osculum along crown, Submerged Motor Pumps is had keep away husky performance, improved the life-span of elastomer stator,, can prolong diving screw rod electric pump operating life more than 2 times to such an extent as to also can prevent the phenomenon that stall that motor produces because of the grains of sand block burns.

Fig. 1 is the utility model structural representation,

Fig. 2 keeps away sand to overlap schematic top plan view,

Fig. 3 keeps away sand to overlap cross-sectional schematic,

The utility model is described in further detail below in conjunction with embodiment:

In the diving screw rod electric pump pump housing 1 motor, elastomer stator 2 are housed, have one in the elastomer stator 2, the shell of the pump housing 1 upper end and delivery chamber 5, available bolton between delivery chamber 5 shells and the water outlet joint 6 by motor-driven screw rod 3.Keep away the top that husky cover 4 is installed in the elastomer stator 2 in the delivery chamber 5, the bead place that keeps away husky cover 4 is by delivery chamber shell compression set.Keeping away husky cover adopts crown that the hat-shaped structure of extension along 7 arranged, on the cap waist, have several osculums 8, the hole can be circular hole or square hole, or slotted hole, and number can be 1,2,3 or several, preferably the sectional area in hole is suitable with the flow of water pump, and Kongzui is opened well on cap waist top, the hole also can be opened at the cap waist by the crown place, and crown is hung along hole that size be cannot see cap waist both sides when overlooking to well.When pump working, the water that screw rod is extruded flows out from osculum.When water pump shuts down, the grains of sand of outlet pipe precipitation will drop down onto the bottom of keeping away husky cover, and can not flow back in the elastomer stator wearing and tearing of having avoided the grains of sand that elastomer stator is caused from osculum outside keeping away husky cover crown extension edge.After using the long period, should regularly remove alluvial at the grains of sand of keeping away around the husky cover, estimation can prolong pump working life more than 2 times.Keeping away husky cover can adopt rubber, plastics or metal etc. to make.

Claims (4)

1. keep away husky diving screw rod electric pump for one kind, connect delivery chamber (5) and water outlet joint (6) on the pump housing (1) successively, motor, screw rod (3), elastomer stator (2) are housed in the pump housing (1), it is characterized in that: keep away husky cover (4) in delivery chamber (5) chamber and cover on the elastomer stator (2).

2. the sand diving screw rod electric pump of keeping away according to claim 1 is characterized in that: the described sand cover of keeping away is that crown has the hat-shaped structure of hanging edge (7), and the cap waist has several osculums (8).

3. the sand diving screw rod electric pump of keeping away according to claim 2, it is characterized in that: the described crown of keeping away husky cover is hung edge (7) can cover the cap waist when overlooking osculum (8).

4. according to claim 2 or the 3 described sand diving screw rod electric pumps of keeping away, it is characterized in that: described osculum (8) the next-door neighbour crown of keeping away on the husky cap waist that overlaps.

Images