CN201328034Y

CN201328034Y - Submerged pump cable sealing structure

Info

Publication number: CN201328034Y
Application number: CNU200820157648XU
Authority: CN
Inventors: 吴永旭; 刘月阳; 周国荣; 张晓宁
Original assignee: Shanghai East Pump Group Co Ltd
Current assignee: Shanghai East Pump Group Co Ltd
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2009-10-14
Anticipated expiration: 2018-12-23

Abstract

The utility model discloses a submerged pump cable sealing structure, which comprises a cable gland, a motor in a water pump, a cable and various phases of cores in the cable. The submerged pump cable sealing structure is characterized in that a first sealing body is arranged between an outer sheath of the cable and the cable gland, a second sealing body is arranged among the phases of cores after the motor is stripped from the cable, a plurality of strings of conductors are arranged in the cores, and a third sealing body arranged among the strings of conductors. The utility model resolves the problem that water enters the motor along clearances among the conductors inside the cores, when the cable is scratched or the cable is immersed in water, the submerged motor can not leak water, and then the motor can not be burned due to short circuits, thereby prolonging service life of the motor and increasing sealing effect.

Description

The submersible pump cable hermetically-sealed construction

Technical field:

The utility model relates to immersible pump, the cable seal structure in particular a kind of immersible pump.

Background technology:

The immersible pump small volume and less weight plays an important role in the rural production life, in order to guarantee the reliability service of immersible pump, increases the service life, and needs regularly immersible pump and control system thereof to be carried out the full maintenance maintenance, does once preventive maintenance comprehensively every year at least.In maintenance, in the long period of soaking water, cause the cable season cracking when using owing to immersible pump, water directly enters immersible pump by crackle along cable inside, must regularly be the key of assurance water pump stable operation to cable inspection therefore.

As shown in Figure 1, the inner wiring in original motor for submerged pump upper end, the core 11 of cable three-phase directly links to each other with stator lead-out wire by terminal block, and this cable 10 is the rubber cover water-proof cable of band outer rubber cover, and this cable 10 is to be connected with lead-out wire in the motor cavity by common terminal head; But this cable comes with some shortcomings:

1, adopts common binding post in original mode of connection, if long-time running.Cable 10 overcoats gall be fixed plate or steel wire and puncture, water also can enter motor along core 11 copper cash, perhaps by the cylindrical place of cable feedthrough 20 with the cable rubber sleeve, enters the pump motor chamber, cause the decline of the insulation property of motor 50, thereby cause motor 50 to burn.

2, just directly seal behind original cable 10 strip off cable epidermis strapping wires by line bank and stator lead-out wire, between core and the core without any sealing.The flow of large diving pump is all very big, cable can be by current scour in steel pit shaft or concrete pit shaft, can wear and tear with the steel wire rope of tying up cable, the long-term operation meeting galls the cable epidermis, face seal outside when entering motor because of external cable 10, after the cable 10 crust breakages, water can enter motor cavity along the space between the core 11, the insulation that causes motor descends, and causes motor to burn out.

3, between the multiply conductor in the inner every core of original cable without any sealing, water pump long-term operation meeting galls the epidermis of core 11, and water can enter into the pump motor chamber along the gap between core 11 inner wires, the insulation that causes motor descends, and causes motor to burn out easily.

The utility model content:

The utility model purpose is, overcomes the deficiencies in the prior art, and provides a kind of motor seal performance good, can prevent that water from flowing into motor for submerged pump, increases the motor submersible pump cable hermetically-sealed construction in useful life.

To achieve these goals, the utility model is realized by following technical solution:

The submersible pump cable hermetically-sealed construction, comprise each the phase core in motor, cable and the cable in cable feedthrough, the water pump, it is characterized in that, be provided with first seal between described cable jacket and the cable feedthrough, be used for gap between shutoff cable rubber sleeve and the gland; After described motor and the cable strip off each is provided with second seal mutually between the core, be used for shutoff motor and each gap of core mutually; Be provided with plural number strand conductor in the described core, be provided with the 3rd seal between the described plural number strand conductor, the gap between described the 3rd seal shutoff conductor has prevented the motor of water by the gap inflow pump between conductor.

Further, described first seal is the long cable section of ingoing line sealing of cable jacket and the whole pressure injection of cable feedthrough, can prevent the cylindrical place of sealing by cable jacket, enters the pump motor chamber.

Further, described second seal be motor with the cable strip off after each long cable section of ingoing line of whole pressure injection sealing between the core mutually, can prevent that sealing passes through the gap between interior each the phase core of cable, enters the pump motor chamber.

Further, described the 3rd seal comprises the tin layer on the plural number strand conductor of intrinsic strip off in motor cavity and is wrapped in the water blocking tape outside the described tin layer and is wrapped in cable heat-shrinkable T bush outside the water blocking tape, the place's of pushing down cable seals after then the 3rd seal integral body being put into hot pressing injection molding tool, prevented that the space of water between the core conductor inside from entering motor, increased sealing effectiveness.

According to above-mentioned described submersible pump cable hermetically-sealed construction, wherein, above-mentioned conductor is a copper conductor.

The beneficial effects of the utility model are:

1, between cable feedthrough and cable jacket, each is respectively equipped with seal mutually between the core and between the conductor, three-layer sealed from outside to inside, even cable scratches or cable is immersed in and all can cause submersible motor to leak in the water, increased the useful life of motor, improved sealing effectiveness.

2, novel structure, cost is low, has solved the problem that water gap between core in the cylindrical of cable jacket and the overcoat flows into motor, prevents burn-down of electric motor.

3, the integral sealing unit is integrated, and solved cable core and galled, the problem that the space of water between the core conductor inside enters motor, easily manufactured, processing easily is fit to produce in batches.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 inserts motor internal cable schematic diagram for existing immersible pump.

Fig. 2 is a structural representation of the present utility model.

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

With reference to figure 2, submersible pump cable hermetically-sealed construction of the present utility model, it comprises the motor 50 in cable feedthrough 20, the water pump, the rubber cover water-proof cable 10 of band rubber sleeve and each the phase core 11 in the cable 10.The sealing of the long cable section of ingoing line of these cable 10 overcoats and cable feedthrough 11 whole pressure injections constitutes first seal 30, is used for gap between shutoff cable rubber sleeve and the gland 11; After motor 50 and cable 10 strip ofves each mutually between the core 11 sealing of the long cable section of ingoing line of whole pressure injection constitute second seal 40, be used for shutoff motor and each gap of core mutually.In the present embodiment, the long cable section of ingoing line of whole pressure injection sealing outside cable jacket and outside the core 11 of cable 10 front end strip ofves, promptly first seal 30 and second seal 40 constitute the inlet wire seal, this inlet wire seal places between gland, motor and the cable, anti-sealing enters the pump motor chamber by the cylindrical place of cable jacket or the gap between interior each the phase core 11 of cable.

Be surrounded by plural number strand flexible conductor in core 11, this conductor is a copper conductor; The plural number strand copper conductor of the strip off in motor cavity is the joint wicking of cable, makes plural number burst copper conductor overall fixed together by the tin processing, forms the tin layer and is used for gap between shutoff multiply copper conductor.

In the utility model, be wound with water blocking tape outside the tin layer, this water blocking tape can be high pressure adhesive waterproof tape or other water resistant articles; Behind high pressure adhesive waterproof tape winding wicking position, again with the sealing of cable heat-shrinkable T bush, after after this integral body is put into hot pressing injection molding tool, the place's of pushing down cable seals, thereby constituted the 3rd seal, be used for having increased sealing effectiveness, prevented that water from flowing into electric-motor pump by the gap between conductor.

The utility model between cable feedthrough and cable jacket, each is respectively equipped with seal between the core 11 and between the conductor mutually, three-layer sealed from outside to inside, even cable scratches or cable is immersed in and all can cause submersible motor to leak in the water, solved the problem that water gap between core in the cylindrical of cable jacket and the overcoat flows into motor, increase the useful life of motor, improved sealing effectiveness.In addition, the utility model adopts the integral sealing unit integrated, and solved cable core and galled, the problem that the space of water between the core conductor inside enters motor, easily manufactured, processing easily is fit to produce in batches.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1, submersible pump cable hermetically-sealed construction, comprise each the phase core in motor, cable and the cable in cable feedthrough, the water pump, it is characterized in that, be provided with first seal between described cable jacket and the cable feedthrough, after described motor and the cable strip off each is provided with second seal mutually between the core, be provided with plural number strand conductor in the described core, be provided with the 3rd seal between the described plural number strand conductor.

2, submersible pump cable hermetically-sealed construction according to claim 1 is characterized in that, described first seal is the long cable section of ingoing line seal of cable jacket and the whole pressure injection of cable feedthrough.

3, immersible pump hermetically-sealed cable according to claim 1 is characterized in that, described second seal be motor with the cable strip off after each long cable section of ingoing line seal of whole pressure injection between the core mutually.

4, submersible pump cable hermetically-sealed construction according to claim 1, it is characterized in that, described the 3rd seal comprises the tin layer on the plural number strand conductor of intrinsic strip off in motor cavity and is wrapped in the water blocking tape outside the described tin layer and is wrapped in cable heat-shrinkable T bush outside the water blocking tape, then the 3rd seal integral body is put into hot pressing injection molding tool after the place's of pushing down cable seal.

5, according to claim 1 or 4 described submersible pump cable hermetically-sealed constructions, it is characterized in that described conductor is a copper conductor.