CN111613912A - High-temperature motor oil-submersible cable connecting device - Google Patents
High-temperature motor oil-submersible cable connecting device Download PDFInfo
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- CN111613912A CN111613912A CN202010581193.XA CN202010581193A CN111613912A CN 111613912 A CN111613912 A CN 111613912A CN 202010581193 A CN202010581193 A CN 202010581193A CN 111613912 A CN111613912 A CN 111613912A
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- Prior art keywords
- cable
- shrinkable tube
- layer
- temperature motor
- cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
- H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
- H01R13/5221—Sealing means between coupling parts, e.g. interfacial seal having cable sealing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/1806—Heat shrinkable sleeves
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Abstract
The invention discloses a high-temperature motor submersible cable connecting device, which relates to the technical field of cable connection supporting facilities of oil exploitation submersible electric pumps, and comprises a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the electric conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; and two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube. The defect that the traditional cable sealing device is unreliable in operation at high temperature, so that well liquid or gas enters the cable sealing device to cause short-circuit breakdown of a cable is overcome.
Description
Technical Field
The invention relates to the technical field of cable connection supporting facilities of an oil exploitation electric submersible pump, in particular to a high-temperature motor electric submersible cable connecting device.
Background
The high-temperature electric submersible pump is efficient and reliable lifting equipment in a Steam Assisted Gravity Drainage (SAGD) mining technology, a high-temperature electric submersible cable is an electric energy transmission channel of the high-temperature electric submersible pump, and the underground part of an electric submersible pump unit and the high-temperature electric submersible cable work in a high-temperature environment at about 250 ℃. In order to facilitate the transportation of the electric submersible pump unit and improve the field operation efficiency, the high-temperature submersible motor in the high-temperature electric submersible pump unit is provided with a lead cable with a length of tens of meters during production and manufacturing. In the well operation of the submersible electric pump, a power cable is required to be connected with a lead cable. The existing high-temperature oil-submersible cable is a three-phase wire and comprises three cable cores, wherein a multi-layer insulating layer and a jacket layer are sequentially wrapped outside the core wire of each cable core, and the three cable cores are wrapped by stainless steel armors. When the power cable is connected with the leading cable, a certain length of steel armor needs to be stripped, and then a special high-temperature cable joint sealing device is adopted. The cable joint sealing structure of the high-temperature electric submersible pump mentioned in patent No. CN201510632986.9 is a structure adopted in domestic production at present, although the mechanism adopts a double sealing technology of compensation sealing and insulating oil filling, the phenomenon of short circuit failure is caused when well liquid or gas enters the cable joint sealing mechanism in the production process, equipment damage is brought, and crude oil production reduction is further caused; meanwhile, two ends of the high-temperature cable joint sealing mechanism are provided with three exposed cable cores with the lengths of about 300mm-400mm, stainless steel armor protection is not adopted, and the exposed cable cores are subjected to insulation cracking under the multiple actions of electrical stress, thermal stress and chemical substances.
Therefore, a reliable and simple high-temperature cable connection mechanism needs to be designed, which not only ensures the insulation sealing performance of the connection part, but also ensures that the cable at the connection part has high enough mechanical strength to resist multiple actions of electrical stress, thermal stress and chemical substances, so that the high-temperature electric submersible pump can normally work.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-temperature motor submersible cable connecting device, which is used for overcoming the problems of liquid leakage and gas leakage of the existing high-temperature cable joint sealing mechanism, improving the insulating sealing performance of the connecting part of a high-temperature cable and ensuring that the cable at the connecting part has high enough mechanical strength to resist electric shock stress and thermal stress and has multiple functions of chemical substances.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a high-temperature motor submersible cable connecting device, which comprises a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; the two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube.
Optionally, the outer heat shrinkable tube and the compensation clamp are externally provided with a reinforcing layer.
Optionally, the reinforcing layer is a woven glass ribbon or a polytetrafluoroethylene ribbon.
Optionally, the cold-pressed sleeve is a copper tube.
Optionally, the insulating filling layer is a polyimide film, or a pressure sensitive adhesive tape, or a polytetrafluoroethylene tape.
Optionally, the inner heat-shrinkable tube and the outer heat-shrinkable tube are teflon heat-shrinkable tubes.
Optionally, the sealing washer is the fluorine rubber circle, the compensation clamp is the constant pressure clamp of area compensation ability.
Optionally, a protective cover is arranged outside the outer heat-shrinkable tube and the compensation clamp.
Optionally, two ends of the shield are respectively provided with a fixing clip, and the fixing clips are used for fixing the shield on the metal armor.
Compared with the prior art, the invention has the following technical effects:
according to the high-temperature motor submersible cable connecting device, the two ends of the outer layer heat-shrinkable tube are respectively provided with the compensation clamp, and the sealing ring is arranged between the compensation clamp and the outer layer heat-shrinkable tube, so that well liquid or gas can be effectively prevented from entering, and the defect that the traditional cable sealing device is unreliable in operation at high temperature, and the short circuit breakdown of a cable is caused because the well liquid or the gas enters the cable sealing device is overcome.
The high-temperature motor submersible cable connecting device is simple in structure, can coat exposed insulation, and can enhance mechanical strength and resist electric stress, thermal stress and damage caused by chemical substances.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a three-dimensional view of the junction of the high temperature submersible cable of the present invention;
FIG. 2 is a schematic view of a high temperature motor submersible cable connection arrangement of the present invention;
FIG. 3 is a schematic view of the connection of the lead in cable of the present invention to the cable core of the power cable;
fig. 4 is a schematic cross-sectional view of the high temperature motor submersible cable connection of the present invention;
description of reference numerals:
1. the high-temperature submersible motor comprises a high-temperature submersible motor, 2. a lead cable, 3. a power cable, 4. a cable core, 5, a cold-pressed sleeve, 6, an insulating filling layer, 7. an inner-layer heat-shrinkable sleeve, 8. an outer-layer heat-shrinkable sleeve, 9. a reinforcing layer, 10. a shield, 11. a sealing ring, 12. a compensation clamp, 13. a fixing clamp, 14. a metal armor, 341. an electric conductor, 342. an insulating layer, 343. a sheath layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a high-temperature motor submersible cable connection device, which includes a lead cable 2, a power cable 3, and a cold-pressed casing 5; the lead cable 2 and the power cable 3 respectively comprise three cable cores 4, each cable core 4 comprises an electric conductor 341, an insulating layer 342 and a sheath layer 343 from inside to outside, and metal sheaths 14 are arranged outside the three cable cores 4; the cold-pressed sleeve 5 connects the lead cable 2 and the electric conductor 341 of the power cable 3 into a whole; an insulating filling layer 6 is arranged outside the cold-pressed sleeve 5, the conductor 341 and the insulating layer 342; an inner heat shrinkable sleeve 7 is arranged outside the insulating filling layer 6; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; the two ends of the outer layer heat-shrinkable tube are respectively provided with a compensation hoop 12, and a sealing ring 11 is arranged between the compensation hoop 12 and the outer layer heat-shrinkable tube.
In this embodiment, the length of the outer heat shrinkable tube is greater than the length of the inner heat shrinkable tube. And reinforcing layers 9 are arranged outside the outer layer heat-shrinkable tube and the compensation hoop 12. The reinforcing layer 9 is a woven glass ribbon. The cold-pressed sleeve 5 is a copper tube. The insulating filling layer 6 is a polytetrafluoroethylene tape. The inner layer heat-shrinkable tube and the outer layer heat-shrinkable tube are Teflon heat-shrinkable tubes. Sealing washer 11 is the fluorine rubber circle, compensation clamp 12 is the constant pressure clamp of taking compensation ability, and compensation clamp 12 has anticorrosive ability. The outer heat shrinkable tube and the compensation yoke 12 are externally provided with a shield 10. Two ends of the shield 10 are respectively provided with a fixing clip 13, the fixing clips 13 are used for fixing the shield 10 on the metal armor 14, the shield 10 is made of an anticorrosive material, and the shape of the inner cavity of the shield 10 is similar to that of a cable.
The submersible cable connecting device for the high-temperature motor in the embodiment is specifically realized by the following modes:
firstly, the metal armor 14 at the connecting end of the lead cable 2 and the power cable 3 is peeled off, and the electric conductor 341, the insulating layer 342 and the sheath layer 343 of the three cable cores 4 are sequentially peeled into a step shape from small to large;
the cold-pressed sleeve 5 connects the lead cable 2 and the conductor 341 of the power cable 3 into a whole, and the insulating filling layer 6 is wound on the outer sides of the insulating layer 342, the conductor 341 and the cold-pressed sleeve 5 to increase the insulating capability;
the inner layer heat-shrinkable sleeve 7 is sleeved outside the insulating filling layer 6, two end parts of the outer layer heat-shrinkable sleeve 8 are lapped on the sheath, and the outer layer heat-shrinkable sleeve 8 tightly wraps the inner layer heat-shrinkable sleeve 7;
the compensation hoop 12 with the built-in sealing ring 11 clasps the outer layer heat shrinkable sleeve 8 and the sheath tightly, so that well fluid is prevented from entering the insulating layer 342 and the electric conductor 341 along a gap between the outer layer heat shrinkable sleeve and the sheath to cause the insulation failure of the cable;
after the operation is finished, wrapping a reinforcing layer 9 outside the sheath and the outer layer heat shrinkable sleeve 8 to further enhance the mechanical and electrical strength of the cable core 4, wherein the wrapping interval is the area where all the metal armors 14 are stripped;
both ends of the shield 10 are respectively lapped on the outer surfaces of the metal sheaths 14 on the lead cable 2 and the power cable 3, and the shield 10 is firmly fixed to the cable by the fixing clips 13.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A high-temperature motor oil-submersible cable connecting device is characterized by comprising a leading cable, a power cable and a cold-pressed sleeve; the leading cable and the power cable respectively comprise three cable cores, each cable core comprises an electric conductor, an insulating layer and a sheath layer from inside to outside, and metal armoring is arranged outside the three cable cores; the cold-pressed sleeve connects the lead cable and the conductor of the power cable into a whole; an insulating filling layer is arranged outside the cold-pressed sleeve, the conductor and the insulating layer; an inner heat shrinkable sleeve is arranged outside the insulating filling layer; an outer heat-shrinkable tube is arranged outside the inner heat-shrinkable tube; the two ends of the outer heat-shrinkable tube are respectively provided with a compensation clamp, and a sealing ring is arranged between the compensation clamp and the outer heat-shrinkable tube.
2. The high temperature motor submersible cable connection device of claim 1 where the outer heat shrink tube and the compensation clamp have reinforcement layers disposed on the outside.
3. The high temperature motor submersible cable connection device of claim 2 where the reinforcement layer is a braided glass ribbon or a polytetrafluoroethylene ribbon.
4. The high temperature motor submersible cable connection device of claim 1 where the cold pressed casing is a copper tubing.
5. The high-temperature motor submersible cable connection device according to claim 1, wherein the insulating filler layer is a polyimide film, a pressure sensitive adhesive tape, or a polytetrafluoroethylene tape.
6. The high-temperature motor submersible cable connection device according to claim 1, wherein the inner heat shrinkable tube and the outer heat shrinkable tube are teflon heat shrinkable tubes.
7. The high-temperature motor submersible cable connection device according to claim 1, wherein the sealing ring is a viton ring and the compensation clamp is a constant pressure clamp with compensation capability.
8. The high temperature motor submersible cable connection device of claim 1 where the outer heat shrink tube and the compensation collar are externally provided with a shroud.
9. The high-temperature motor submersible cable connection device as claimed in claim 8, wherein a fixing clip is provided at each end of the shield, and the fixing clips are used for fixing the shield to the metal armor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581193.XA CN111613912A (en) | 2020-06-23 | 2020-06-23 | High-temperature motor oil-submersible cable connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581193.XA CN111613912A (en) | 2020-06-23 | 2020-06-23 | High-temperature motor oil-submersible cable connecting device |
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| Publication Number | Publication Date |
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| CN111613912A true CN111613912A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010581193.XA Pending CN111613912A (en) | 2020-06-23 | 2020-06-23 | High-temperature motor oil-submersible cable connecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115555797A (en) * | 2022-11-18 | 2023-01-03 | 中国科学院合肥物质科学研究院 | Insulation repair structure and repair method for high-voltage measuring line fracture |
-
2020
- 2020-06-23 CN CN202010581193.XA patent/CN111613912A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115555797A (en) * | 2022-11-18 | 2023-01-03 | 中国科学院合肥物质科学研究院 | Insulation repair structure and repair method for high-voltage measuring line fracture |
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