CN201044400Y

CN201044400Y - Minitype submersible pump with improved protection

Info

Publication number: CN201044400Y
Application number: CNU2007200683206U
Authority: CN
Inventors: 王东进; 刘虎山
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2007-03-29
Filing date: 2007-03-29
Publication date: 2008-04-02
Anticipated expiration: 2017-03-29

Abstract

The utility model relates to the diving pump technical field, in particular to a small scale diving pump with improved protection. The utility model comprises a cable, a diving motor, a dryer, a sopping preservation material and a heat protector and is characterized in that the cable connected with the diving motor is the cable with an elastic sealing head. The diving motor is provided with the dryer and the sopping preservation material. The heat protector is arranged on the upper part of the diving motor. In any case that the jackets on other parts of the cable of the utility model or the insulation layer of wire core are injured, water can not enter the motor, thereby avoiding burning of the motor. The dryer and the sopping preservation material are ranged in the cavity of the motor so as to avoid the reduction of insulation in the motor windings and the burning of windings and solve the technical problem of over-high of the temperature in the windings at the same time.

Description

A kind of small-sized immersible pump that improves protection

[technical field]

The utility model relates to the immersible pump technical field, designs a kind of small-sized immersible pump that improves protection especially.

[background technology]

Existing small-sized immersible 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 electrical control gear 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 electrical control gear complexity; For the problem that prevents that winding temperature is too high, generally be setting-in temperature-sensitive element in winding, also must outside pump, draw electric wire, make the pump structure complexity, and make the electrical control gear complexity.

[summary of the invention]

Task of the present utility model provides a kind of small-sized immersible pump that improves protection; no matter the sheath of cable other parts still is the insulating barrier breakage of core; water can not enter motor; thereby avoid burn-down of electric motor; place drier, 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.

The technical solution of the utility model is as follows:

A kind of small-sized immersible pump that improves protection; comprise cable, submersible motor, drier, water-absorbing-retaining material and thermal protector; the one section cable that is connected with submersible motor is the cable that has the elastomeric seal head; be placed with drier and water-absorbing-retaining material in the described submersible motor, thermal protector is equipped with on the top in submersible motor.

One section insulating barrier of all cores of described cable link 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 heatmeltable fluid sealant, skin is an insulating barrier, and elastomeric seal head sealing hard-pressed bale is in insulating sleeve and all core outsides of this section cable.

Described drier 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 penetration, 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.

Described thermal protector is made up of bimetal leaf, 3 heating wire and shell, and 3 heating wire are connected in series with 3 winding terminals of winding star point respectively.

Effect of the present utility model 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 insulating barrier breakage of core, water can not enter motor, thereby avoids burn-down of electric motor;

2. place drier in motor cavity, absorb the moisture in the motor cavity, thereby avoid motor windings to reduce insulating properties, drier 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 thermal protector, when temperature is too high in the motor; thermal protector will move, and directly disconnects winding and connects, and makes the pump stall; after temperature in the motor was recovered normally, thermal protector can recover winding again and connect.

2,3,4 of the technical program need not draw electric wire outside pump, also do not need the outer electrical control gear of pump that matches with it.

[description of drawings]

Fig. 1 is a structural representation of the present utility model;

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 thermal protector of installing of submersible motor among Fig. 1;

Fig. 4 is the schematic diagram of the interior thermal protector operating state of installing of submersible motor among Fig. 1;

Fig. 5 is the schematic diagram of the interior thermal protector off-state of installing of submersible motor among Fig. 1.

[specific embodiment]

Referring to Fig. 1, the utility model is a kind of small-sized immersible pump that improves protection, comprises cable 1, submersible motor 2.

Referring to Fig. 2, it has expressed the cable 1 that has elastomeric seal head 11, one section insulating barrier 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 heatmeltable fluid sealant, skin is an insulating barrier, 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 insulating barrier breakage of core, water can not enter motor, thereby avoids burn-down of electric motor.

Referring to Fig. 1, in submersible motor 2, placed drier 21, drier 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, drier can absorb the moisture in the motor cavity, making does not have condensation in motor, thereby avoids motor windings to reduce insulating properties, and drier 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 penetration, 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; thermal protector 27 is equipped with on top in submersible motor 2; thermal protector 27 is by bimetal leaf 271; 3 heating wire 272 and shell 273 are formed; 3 heating wire 272 are connected in series with the end of 3 windings 28 of winding star point respectively; when the temperature around the thermal protector is lower than the design temperature of thermal protector; bimetal leaf 271 contacts with the contact of 3 heating wire 272; winding is connected; when the temperature around the thermal protector surpasses the design temperature of thermal protector; bimetal leaf 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; bimetal leaf 271 can automatically reset again, recovers winding and connects.Thermal 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 effect during the long-time dehydrating operation of motor, and need not the control element that match with it be set outside motor, make the simple in structure of immersible pump.

Claims

1. small-sized immersible pump that improves protection; comprise cable, submersible motor, drier, water-absorbing-retaining material and thermal 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 drier and water-absorbing-retaining material in the described submersible motor, thermal protector is equipped with on the top in submersible motor.

2. the small-sized immersible pump of improvement protection as claimed in claim 1; it is characterized in that: one section insulating barrier of all cores of described cable link 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 heatmeltable fluid sealant; skin is an insulating barrier, and elastomeric seal head sealing hard-pressed bale is in insulating sleeve and all core outsides of this section cable.

3. the small-sized immersible pump of improvement protection as claimed in claim 1; it is characterized in that: described drier 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 penetration; bag sticks with glue in the cavity of motor cavity bottom, and this cavity communicates with the cavity on mechanical seal top is porose.

4. the small-sized immersible pump of improvement as claimed in claim 1 protection is characterized in that: described thermal protector is made up of bimetal leaf, 3 heating wire and shell, and 3 heating wire are connected in series with 3 winding terminals of winding star point respectively.