CN101550940A

CN101550940A - Submersible shaft pump

Info

Publication number: CN101550940A
Application number: CNA2009100504869A
Authority: CN
Inventors: 胡涛; 李胜勇
Original assignee: Shanghai Aoli Pump Manufacturing Co Ltd
Current assignee: Shanghai Aoli Pump Manufacturing Co Ltd
Priority date: 2009-05-04
Filing date: 2009-05-04
Publication date: 2009-10-07

Abstract

The invention relates to the technical field of submersible pump, especially a submersible shaft pump, comprising cables, a submersible electric motor, dryer, water-absorbing and keeping material and a heat protector. A section of cable connected to the submersible motor is the cable with a flexible sealing head. The submersible motor is provided with the dryer and the water-absorbing and keeping material inside; the upper part of the submersible motor is provided with the heat protector; no matter the rest parts of the cable of the invention are sleeves or the core insulating layer damage, the water never flows to the motor, which avoids the destruction of the motor; the cavity of the motor is provided with the dryer and the water-absorbing and keeping material, which avoids the destruction of the motor caused by the less insulation and the technical problems of the high temperature of the winding.

Description

A kind of submersible axial flow pump

[technical field]

The present invention relates to the submersible pump technical field, design a kind of submersible axial flow pump especially.

[background technique]

Existing submersible axial flow pump generally only seals one section sheath cylindrical that it enters motor to cable, and after sheath outside this section or core breakage, water can enter motor, causes burn-down of electric motor; Cause in the motor cavity moist problem under water for placing for a long time because of pump, what have installs heat tape in motor, but can only prevent condensation, can not drive away the moisture in the motor cavity, and must outside pump, draw electric wire, make the pump structure complexity, and make the electric control equipment complexity; For because of mechanical seal leakage, water enters the problem of motor cavity, generally is the leak detection element is set, but can not avoid making the impatient sharp fall of winding insulation low because of more water enters motor cavity, and must outside pump, draw electric wire equally, make the pump structure complexity, and make the electric control equipment complexity; For the problem that prevents that winding temperature is too high, generally be setting-in thermosensitive element in winding, also must outside pump, draw electric wire, make the pump structure complexity, and make the electric control equipment complexity.

[summary of the invention]

Task of the present invention provides a kind of submersible axial flow pump, no matter the sheath of cable other parts still is the isolation layer breakage of core, water can not enter motor, thereby avoid burn-down of electric motor, place siccative, water-absorbing-retaining material in the motor cavity, thereby avoid motor windings reduction insulating properties even winding to burn, also solved the too high technical problem of winding temperature simultaneously.

Technological scheme of the present invention is as follows: a kind of submersible axial flow pump; comprise cable, submersible motor, siccative, water-absorbing-retaining material and heat protector; the one section cable that is connected with submersible motor is the cable that has the elastomeric seal head; be placed with siccative and water-absorbing-retaining material in the described submersible motor, heat protector is equipped with on the top in submersible motor.

One section isolation layer of all cores of described cable connecting end is divested, one section conductor in the core dips in tin and irritates real, on the adjacent core in this section conductor and conductor two ends, overlapping the double hyer insulation sleeve pipe, the internal layer of double hyer insulation sleeve pipe is the hot melt sealer, skin is an isolation layer, and elastomeric seal head sealing hard-pressed bale is in spaghetti and all core outsides of this section cable.

Described siccative adopts paper bag or the non-woven bag packing with gas permeability, bag sticks with glue on the part of motor lower portion, water-absorbing-retaining material adopts the paper bag packing with water permeability, and bag sticks with glue in the cavity of motor cavity bottom, and this cavity communicates with the cavity on mechanical seal top is porose.

Effect of the present invention and advantage are:

1. adopt the cable that has the elastomeric seal head, one section of submersible motor one side of this cable has the elastomeric seal head, the sheath of this section cable and all cores and conductor are all sealed, like this, no matter the sheath of cable other parts still is the isolation layer breakage of core, water can not enter motor, thereby avoids burn-down of electric motor;

2, place siccative in motor cavity, absorb the moisture in the motor cavity, thereby avoid motor windings to reduce insulating properties, siccative can also be reused behind the thermal dehydration when pump keeps in repair;

3, in motor cavity, place water-absorbing-retaining material, mechanical seal leakage is absorbed and maintenance to the water in the motor, make it can not be dispersed into motor cavity rapidly, thereby avoid rapid reduction of motor windings insulating properties even winding to burn;

4, utilize the condition of motor windings employing star connection, at y connection central point device heat protector, when temperature is too high in the motor; heat protector will move, and directly disconnects winding and connects, and makes the pump stall; after temperature in the motor was recovered normally, heat protector can recover winding again and connect.

[description of drawings]

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the construction of cable figure that has the elastomeric seal head of submersible motor one side among Fig. 1;

Fig. 3 is the wiring schematic diagram of the interior heat protector of installing of submersible motor among Fig. 1;

Fig. 4 is the schematic representation of the interior heat protector working state of installing of submersible motor among Fig. 1;

Fig. 5 is the schematic representation of the interior heat protector off state of installing of submersible motor among Fig. 1.

[embodiment]

The present invention is a kind of submersible axial flow pump, comprises cable 1, submersible motor 2.The cable 1 that has elastomeric seal head 11, one section isolation layer of all cores 12 of one section cable of its submersible motor 2 one sides is divested, one section conductor 121 in it dips in tin and irritates real, on the adjacent core in this section conductor and two ends thereof, overlapping double hyer insulation sleeve pipe 13, the internal layer of double hyer insulation sleeve pipe 13 is the hot melt sealer, skin is an isolation layer, after the heating the adjacent core of this section conductor 121 and two ends thereof packed tightly sealing and insulation, elastomeric seal head 11 packs tightly sealing with sheath 14 and all cores 12 of this section cable again, like this, no matter the sheath of cable other parts still is the isolation layer breakage of core, and water can not enter motor, thereby avoids burn-down of electric motor.

Referring to Fig. 1, in submersible motor 2, placed siccative 21, siccative 21 is to pack with paper bag or non-woven bag with gas permeability, bag sticks with glue on the part of motor lower portion, siccative can absorb the moisture in the motor cavity, making does not have condensation in motor, thereby avoids motor windings to reduce insulating properties, and siccative can also be reused behind the thermal dehydration when pump keeps in repair.

Referring to Fig. 1, in submersible motor 2, placed water-absorbing-retaining material 22, water-absorbing-retaining material 22 is with the paper bag packing with water permeability, bag sticks with glue in the cavity 23 of motor cavity bottom, cavity 23 communicates with the cavity 25 porose 26 on mechanical seal 24 tops, after water that mechanical seal leakage comes out flows into cavitys 23 by cavity 25 and hole 26, absorbed by water-absorbing-retaining material 22 and keeps, avoid the motor windings insulating properties sharply reduction even winding burn thereby make water can not be dispersed into motor cavity rapidly.

Referring to Fig. 1 and Fig. 3; heat protector 27 is equipped with on top in submersible motor 2; heat protector 27 is by bimetallic strip 271; 3 electric heating wire 272 and shell 273 are formed; 3 electric heating wire 272 are connected in series with the end of 3 windings 28 of winding star point respectively; when the temperature around the heat protector is lower than the setting temperature of heat protector; bimetallic strip 271 contacts with the contact of 3 electric heating wire 272; winding is connected; when the temperature around the heat protector surpasses the setting temperature of heat protector; bimetallic strip 271 is upset rapidly just; directly disconnecting winding connects; make the pump stall, avoid winding to be damaged, after temperature in the motor is recovered normally because of overheated; bimetallic strip 271 can automatically reset again, recovers winding and connects.Heat protector is when causing that owing to overload, phase shortage, stall electric current increases; when ambient temperature is too high; all winding there is effectively protective action during the long-time dehydrating operation of motor, and need not the control unit that match with it be set outside motor, make the simple in structure of submersible pump.

Claims

1, a kind of submersible axial flow pump; comprise cable, submersible motor, siccative, water-absorbing-retaining material and heat protector; it is characterized in that: the one section cable that is connected with submersible motor is the cable that has the elastomeric seal head; be placed with siccative and water-absorbing-retaining material in the described submersible motor, heat protector is equipped with on the top in submersible motor.

2, submersible axial flow pump as claimed in claim 1, it is characterized in that: one section isolation layer of all cores of described cable connecting end is divested, one section conductor in the core dips in tin and irritates real, on the adjacent core in this section conductor and conductor two ends, overlapping the double hyer insulation sleeve pipe, the internal layer of double hyer insulation sleeve pipe is the hot melt sealer, skin is an isolation layer, and elastomeric seal head sealing hard-pressed bale is in spaghetti and all core outsides of this section cable.

3, submersible axial flow pump as claimed in claim 1, it is characterized in that: described siccative adopts paper bag or the non-woven bag packing with gas permeability, bag sticks with glue on the part of motor lower portion, water-absorbing-retaining material adopts the paper bag packing with water permeability, bag sticks with glue in the cavity of motor cavity bottom, and this cavity communicates with the cavity on mechanical seal top is porose.