CN-224218198-U - Submersible linear motor outgoing line and cable connection structure

CN224218198UCN 224218198 UCN224218198 UCN 224218198UCN-224218198-U

Abstract

The utility model discloses a connection structure of a motor outgoing line and a cable of a submersible linear motor, which comprises the motor outgoing line, the cable and a cable fixing clamp, wherein the motor outgoing line comprises a cable and a metal shell sleeved outside the cable, a conical surface is arranged in the middle of the metal shell and is in taper fit with the end of the motor, the motor outgoing line is fixedly connected with the cable, a polytetrafluoroethylene strip is fixedly wound at a copper wire connection position, a polytetrafluoroethylene strip is wound between the motor outgoing line and the cable, and the winding position of the polytetrafluoroethylene strip is subjected to heating treatment, and the cable fixing clamp comprises a split-phase cable fixing clamp and a submersible cable fixing clamp which are of a Harvard structure. The connecting structure improves the tightness and stability of the outgoing line and the cable of the submersible linear motor and reduces the radial size of the whole motor.

Inventors

WANG HONGJI
REN KE
HU FEI
XIE SHENGHAI
WEN FENGYU
ZHU LIYAN

Assignees

湖南中车尚驱电气有限公司
长园电力技术有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (10)

1. A connection structure of a motor outgoing line and a cable of an oil-submersible linear motor is characterized by comprising the motor outgoing line, a cable and a cable fixing clamp, wherein the motor outgoing line comprises a cable and a metal shell sleeved outside the cable, a conical surface is arranged in the middle of the metal shell and is in taper fit with an end of the motor, the motor outgoing line is fixedly connected with the cable, a fluoroplastic strip is fixedly wound at a copper wire connection position, a polytetrafluoroethylene strip is wound between the motor outgoing line and the cable, the winding position of the polytetrafluoroethylene strip is subjected to heating treatment, and the cable fixing clamp comprises a split-phase cable fixing clamp and an oil-submersible cable fixing clamp which are of a Harvard structure.
2. The connection structure of outgoing lines and cables of a submersible linear motor according to claim 1, wherein the split-phase cable fixing clamp comprises a cable fixing outer clamp, a cable fixing inner clamp and a locking inner clamp, wherein the cable fixing inner clamp is fixed on the cable fixing outer clamp, an outer clamp holding clamp circular arc is arranged on the cable fixing outer clamp, an inner clamp holding clamp circular arc is arranged on the cable fixing inner clamp, and anti-slip gaskets are arranged on the outer clamp holding clamp circular arc and the inner clamp holding clamp circular arc.
3. The connection structure of the outgoing line and the cable of the submersible linear motor is characterized in that the submersible cable fixing clamp comprises an upper cable fixing clamp flap and a lower cable fixing clamp flap which are fixedly connected, the upper cable fixing clamp flap is provided with a submersible cable fixing notch, and an anti-slip gasket is adhered to the fixing notch.
4. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 3, wherein the anti-skid gasket is made of rubber.
5. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 1, wherein the cable and the metal shell outside the cable are in interference fit through a cold drawing process.
6. The connection structure of outgoing lines and cables of a submersible linear motor according to claim 1, wherein the metal shell is made of stainless steel and is connected with a motor end through welding.
7. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 1 is characterized in that the fluoroplastic strip is a perfluoroethylene propylene strip, the heating treatment temperature is 180-210 ℃, and the heating time is 8-10 minutes.
8. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 1, wherein the outgoing line and the cable of the submersible linear motor are fixedly connected through induction welding or crimping of a copper sleeve or a copper core plug.
9. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 1, wherein a plurality of groups of cable fixing clamps can be arranged.
10. The connection structure of the outgoing line and the cable of the submersible linear motor according to claim 1, wherein the angle of taper fit is 30-60 degrees.

Description

Submersible linear motor outgoing line and cable connection structure Technical Field The utility model relates to the technical field of motor wire fixing, in particular to a connection structure of an outgoing wire and a cable of an oil-submersible linear motor. Background The submersible motor works in a high-temperature, high-pressure and strong-corrosiveness underground environment, and has severe working conditions, so that great tests are provided for the firmness, the tightness and the weather resistance of the outgoing line and the cable of the motor. When the submersible electric pump enters and exits the oil well and the electric pump works, the cable connector is affected by external force impact, and all factors initiate challenges to the stable operation of the submersible electric pump. And because the projection diameters of the oil pipe and the motor are limited, the external dimension of the cable joint needs to be strictly controlled. The submersible cable connector is used as a key component for connecting the submersible motor and the submersible cable, is a weak point of the whole submersible electric pump system in electric and mechanical, and has insulation, sealing and stability degrees directly affecting the reliability of the submersible electric pump. The existing submersible motor lead-out wire and cable are difficult to balance the requirements of insulation, sealing and mechanical strength. Most of the connection of the submersible cable is generally completed by adopting a manual crimping winding mode, the sealing performance of a cable sheath used outside the insulating layer is limited, the capability of being impacted by external force is poor, well liquid can infiltrate into a gap between the sheath and a joint insulator after the underground long-term work, the insulation quality of the cable is affected, and the service life of the submersible electric pump is reduced. The utility model CN205304204U discloses a submersible cable connecting device which comprises a cable connector, a sealing sleeve, a crimping piece and a crimping piece, wherein the cable connector is in a hollow cylinder shape and is used for being sleeved on the outer side of a group of submersible cable cores to be spliced, the sealing sleeve is in a hollow cylinder shape and is sleeved on the outer side of the cable connector, the length of the sealing sleeve is larger than that of the cable connector, the crimping piece comprises a first crimping block and a second crimping block, the first crimping block is in butt joint with the second crimping block and can form at least one first hole, the first hole is used for being matched with the submersible cable cores, the cross section area of the first hole is smaller than that of the submersible cable cores, the limiting pressing block comprises a first pressing block and a second pressing block, the first pressing block is matched with the second pressing block and can form at least one second hole, and the second hole is used for being matched with a submersible cable insulating layer. The device has certain sealing capacity and tensile capacity, but has high requirements on the processing precision and the assembly capacity of the cable connector and the sealing sleeve, meanwhile, the tightness of the cable connector is realized through interference fit among mechanical parts, the sealing effect can be quickly reduced after various impacts are applied to underground long-time work, and the cable connector scheme is used for sealing a three-phase cable, occupies too large volume, is easy to influence the normal operation of other underground parts and is not suitable for connecting and fixing the cable and a motor outgoing line. Disclosure of Invention The utility model provides a connection structure of outgoing lines and cables of a submersible linear motor, which aims to solve the problems in the prior art. The technical scheme adopted by the utility model is as follows: The utility model provides a connection structure of a motor outgoing line and a cable of an oil-submersible linear motor, which comprises a motor outgoing line, a cable and a cable fixing clamp, wherein the motor outgoing line comprises a cable and a metal shell sleeved outside the cable, a conical surface is arranged in the middle of the metal shell and is in taper fit with an end head of the motor, the motor outgoing line is fixedly connected with the cable, a fluoroplastic strip is fixedly wound at a copper wire connection position, a polytetrafluoroethylene strip is wound between the motor outgoing line and the cable, and the winding position of the polytetrafluoroethylene strip is subjected to heating treatment, and the cable fixing clamp comprises a split-phase cable fixing clamp and an oil-submersible cable fixing clamp which are of a half structure. Further, split-phase cable fixation clamp includes cable fixation outer clamp, fixes cable fixation inner clamp and locking