CN113315040A - Cable accessories installation heating alignment system - Google Patents
Cable accessories installation heating alignment system Download PDFInfo
- Publication number
- CN113315040A CN113315040A CN202110524079.8A CN202110524079A CN113315040A CN 113315040 A CN113315040 A CN 113315040A CN 202110524079 A CN202110524079 A CN 202110524079A CN 113315040 A CN113315040 A CN 113315040A
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- Prior art keywords
- clamping
- heating
- cable
- arc surface
- locking plate
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 65
- 238000009434 installation Methods 0.000 title description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 18
- 239000010410 layer Substances 0.000 description 8
- 238000005452 bending Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000011900 installation process Methods 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- 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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
- H02G1/1202—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
- H02G1/1204—Hand-held tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
- B21F1/02—Straightening
-
- 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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Heating (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a heating and straightening system for installing a cable accessory, which comprises a clamping pipe and a clamping device, wherein the clamping pipe consists of an upper clamp and a lower clamp, a clamping space for clamping a cable core to be straighter is formed when the upper clamp and the lower clamp are connected, and the clamping pipe is provided with a heating device; the clamping device is fixed on the outer side of the clamping pipe. The cable straightening device is simple in structure, convenient and rapid to operate, reusable, time-saving, labor-saving, convenient to carry, remarkable in effect and wide in application prospect, and materials consumed are saved, so that the working efficiency of heating and straightening cables is greatly improved.
Description
Technical Field
The invention relates to the technical field of high-voltage transmission cable accessory installation, in particular to a heating and straightening system for cable accessory installation.
Background
The heating and straightening process is an important process in the installation of power cable accessories, and aims to eliminate the mechanical stress of bending and insulating retraction of a cable body. The cable production storage process can generate bending mechanical stress due to huge external force influence, the cable is in a bending shape, according to the installation process requirement of the cable joint and the requirement of long-term stable operation of the cable, the mechanical stress of the cable body must be eliminated before the installation of the cable joint accessory, and the adjacent cables at the two ends of the middle joint and the joint are ensured to keep a straight line. Meanwhile, the cable insulation retraction can be accelerated by heating and straightening, and the potential safety hazard caused by large changes of key sizes such as the overlapping length of a semi-conductive fracture in a main body (stress cone) after the joint is installed due to the insulation retraction is eliminated. If the cable is bent, the cable treatment size is greatly deviated in the accessory installation process, the strict requirement of a joint installation process cannot be met, an air gap is generated between a cable body and a stress cone due to the bending of the cable in serious conditions, the electric field intensity borne by the air gap is obviously reduced and becomes an obvious weak point of a cable joint, and the probability of breakdown and explosion is greatly increased.
The existing heating and straightening process is that after an aluminum sheath of a cable is stripped, a proper amount of rubber tape (which can be replaced by the water-blocking tape) is wrapped on a cable water-blocking tape, the outer diameter of the cable water-blocking tape is slightly larger than the inner diameter of an open-edge round clamping pipe, then the open-edge round clamping pipe (or angle steel) is adopted to be pressed and tied and fixed by an iron wire in the bending direction, and heating tapes are wrapped on the surface of the round clamping pipe to heat and straighten the cable. Meanwhile, a temperature sensing probe is placed in the water-blocking tape layer to control the heater to keep a set target temperature and continuously output heat power, and the round clamping pipe with the whole edge is wrapped by a heat-insulating blanket. Thereby controlling the time required for the temperature of the cable body to be maintained at the set temperature. Then stopping heating and naturally cooling to room temperature. The heating and straightening process is complicated and fussy in flow and complex in special appliances, the size of the wrapping gap of the heating belt is large, and the placement position of the temperature sensing probe is determined by experience. The open-edge round clamp pipe (or angle steel) is tied by adopting an iron wire band, and the tightness control difficulty is high. There is no standard process flow for wrapping the heat-insulating blanket. A considerable number of construction teams have been familiar with this process of heat straightening, and are therefore not; because the process and the working procedure of the special appliance are complex, the constructors do not know the operation details of the process and the special appliance, and long-term first-line construction experience tells that the heating effect is not good due to negligence in the aspect of heating control, the mechanical stress is not eliminated, the repeated reworking is carried out, and the construction period is delayed; in case of high temperature, the cable is over-fired, the semi-conductive layer and the insulating layer of the cable are damaged, and even the cable is scrapped.
Disclosure of Invention
In order to solve the problems, the invention provides a heating and straightening system for installing a cable accessory, which solves the problems that the existing heating and straightening process is easy to cause poor heating effect due to wrong and leaked operation procedures, mechanical stress is not eliminated, repeated reworking is carried out, the construction period is delayed or the cable is over-fired, a semi-conducting layer and an insulating layer of the cable are damaged, and even the cable is scrapped.
The technical scheme adopted by the invention for solving the technical problems is as follows: a heating and straightening system for installing a cable accessory comprises a clamping pipe and a clamping device, wherein the clamping pipe consists of an upper clamp and a lower clamp, a clamping space for clamping a cable core to be straighter is formed when the upper clamp and the lower clamp are connected, and the clamping pipe is provided with a heating device; the clamping device is fixed on the outer side of the clamping pipe.
The clamping device is characterized in that a temperature sensor is arranged on the inner side wall of the clamping space of the clamping pipe, and the temperature sensor and the heating device are respectively connected with the controller.
The outer wall of the clamping pipe is wrapped with a heat-insulating blanket.
The clamping device comprises a base, a locking plate and a handle, wherein the base is provided with a pressure applying cavity for accommodating the clamping pipe, the locking plate can be movably arranged above the pressure applying cavity of the base up and down, the handle is arranged on the base, and the handle is connected with the locking plate through a connecting rod mechanism and drives the locking plate to move up and down, so that the locking plate clamps the clamping pipe in the pressure applying cavity of the base to apply pressure in a contact manner; and the base is provided with a locking block for fixing the locking plate.
The number of the clamping devices is two or more, and the two clamping devices are respectively arranged at two ends of the clamping pipe.
The upper clamp and the lower clamp are arranged in an axial symmetry manner, and are respectively formed by connecting an outer circular arc surface and an inner circular arc surface which are concentrically arranged through a connecting end surface.
Set up heating device in the intermediate layer between outside arc surface and the inboard arc surface, heating device hugs closely inboard arc surface for heat the inboard arc surface, so that with heat transfer to the cable core, so as to do benefit to straighter the cable core under clamping device's the tightening pressure.
The heating device may be an electric heating wire coiled on the inner surface of the inner arc surface.
The temperature sensor can be embedded in the mounting groove on the outer side of the inner circular arc surface, and the temperature sensor can be in contact with the cable core.
The inner side arc surface is made of an aluminum alloy material, and has good heat conductivity and rigidity. The outer arc surface is made of bakelite (phenolic resin), so that the high-temperature-resistant and insulating effect is achieved, and the cost can be saved.
The heat preservation blanket is provided with a zipper or a magic tape or a button which is convenient to be bound so as to be convenient to connect.
The heat-insulating blanket can be made of fireproof heat-insulating materials such as rock wool and glass fiber cloth, and has good heat-insulating property.
The invention has the beneficial effects that: the system is simple in structure, simple and convenient in used appliance and easy to operate, the whole process is convenient and quick to operate and can be repeatedly used, consumables are saved, the working efficiency of cable heating and straightening is greatly improved, time and labor are saved, the carrying is convenient, the effect is obvious, and the application prospect is wide.
Drawings
Figure 1 is a schematic view of the overall structure of the present invention,
FIG. 2 is a side view of a tube clamping structure of the present invention;
FIG. 3 is a block diagram of the process flow of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The drawings show the detailed construction of the preferred embodiment of the invention. The structural features of the elements are described with reference to the structure shown in fig. 1 if directions (up, down, left, right, front and rear) are described, but the practical use direction of the present invention is not limited thereto.
A heating and straightening system for installing a cable accessory is shown in figure 1 and comprises a controller 1, a clamping pipe 2, a heat preservation blanket 3 and a clamping device 4, wherein the clamping pipe 2 consists of an upper clamp 21 and a lower clamp 22, and when the upper clamp 21 and the lower clamp 22 are connected to form a hollow cylinder shape, a cable core is clamped in an internal clamping space formed by the upper clamp 21 and the lower clamp 22. All install temperature sensor 6 and heating device 5 in upper clamp 21 and the lower clamp 22, temperature sensor 6 and heating device 5 electrical connection controller 1, temperature sensor 6 handles in transmitting the temperature data of gathering to controller 1, controller 1 control heating device 5 work. The heat-insulating blanket 3 is wrapped on the outer wall of the clamping pipe 2 and used for avoiding heat loss. The clamping device 4 is fixed on the outer side of the clamping pipe 2 and used for tightening the clamping pipe 2 and giving a relatively straight pressure to the cable core. Clamping device 4 includes base 41, locking plate 42 and handle 43, base 41 is provided with the chamber of exerting pressure that holds double-layered pipe 2, locking plate 42 can install with moving about from top to bottom base 41 exert pressure the chamber top for tighten up and exert pressure to double-layered pipe 2. The handle 43 is installed on the base 41, the handle 3 is connected with the locking plate 42 through a link mechanism and drives the locking plate 42 to move up and down, so that the locking plate 42 clamps the pressure applying cavity of the base 41 and the clamping tube 2 is contacted to apply pressure. The base 41 is provided with a locking block 44 for fixing the locking plate 42, and the locking block is used for fixing the locking plate 42. Furthermore, the number of the clamping devices 4 is two or more, the two clamping devices 4 are respectively arranged at two ends of the clamping pipe 2, and the two clamping devices 4 apply pressure by pulling at the same time to straighten the cable cores. Furthermore, a zipper or a magic tape or a button which is convenient to bind is arranged on the heat preservation blanket 3. The heat-insulating blanket 3 can be made of fireproof heat-insulating materials such as rock wool and glass fiber cloth and has good heat-insulating property.
As shown in fig. 2, the upper clamp 21 and the lower clamp 22 are arranged in axial symmetry, and the upper clamp 21 and the lower clamp 22 are respectively formed by concentrically connecting an outer circular arc surface 201 and an inner circular arc surface 202 through connecting end surfaces, and respectively form a concentric semi-hollow cylindrical structure. Preferably, the upper clamp 21 and the lower clamp 22 are solid semi-hollow cylindrical structures, can bear extremely high pressure, and can straighten the cable cores placed in the clamping space by pressurization. A heating device is arranged in an interlayer between the outer circular arc surface 201 and the inner circular arc surface 202, and the heating device 5 is tightly attached to the inner circular arc surface 202 and used for heating the inner circular arc surface 202 so as to transfer heat to the cable core, so that the cable core is straightened under the tightening and pressurizing of the clamping device 4. Preferably, the heating device 5 may be a heating wire coiled on the inner surface of the inner arc surface 202. Temperature sensor 6 can be inlayed in the mounting groove in the outside of inboard arc surface 202, temperature sensor 6 can contact with the cable core, can the most accurate temperature of measuring the cable core to feed back to controller 1 and handle back control heating device 5 work. Preferably, the inner arc surface 202 is made of an aluminum alloy material, and has good thermal conductivity and rigidity. The temperature sensor 5 detects the temperature of the inner arc surface 202. The outer arc surface 201 is made of bakelite (phenolic resin), so that the high-temperature-resistant and insulating effect is achieved, and the cost can be saved.
A method for heating and straightening cable accessories, as shown in fig. 3, based on the above-mentioned system for heating and straightening cable accessories, includes the following steps:
s1, stripping a metal sheath of a cable; the insulating metal sheath outside the cable core can be removed in a stripping and cutting mode, so that the cable core is exposed.
S2, placing the cable core in a clamping space in a clamping pipe, and clamping the cable core through the clamping device; specifically, the temperature sensor and the heating device are arranged on an upper clamp and a lower clamp which are concentrically arranged and respectively assembled by an outer circular arc surface and an inner circular arc surface, the upper clamp and the lower clamp are clamped on a naked cable core, and the fireproof heat-preservation blanket is sleeved after the clamping device 4 is installed.
And S3, connecting the temperature sensor and the heating device with a controller.
S4, adjusting the temperature and the heating time of the heating device through a controller, starting heating, and monitoring the heating condition in real time through the temperature sensor;
s5, after the heating time is up, closing a power supply of the heating device, and detaching the fireproof heat-preservation blanket;
s6, keeping the clamping pipe to clamp the conductor of the cable, naturally cooling to normal temperature, and finishing the heating and straightening process.
Wherein the heating time is calculated according to the following formula:
F(x,y,z)＝-1.7*x2+189*x+7.9*y+2155*z-1531.32；
wherein F (x, y, z) is the time required for the copper core temperature to reach the heating temperature, and the unit is s (second); x is the cable core diameter (i.e., the inner diameter of the clamping tube) in mm (millimeters); y is the heating temperature in K (degrees Kelvin); z is the heating tube length of the heating device in m (meters).
For example: when the diameter x of the cable core is 33.8mm, the heating temperature is y 353.15K, the heating tube length z of the heating device is 2m, and the above values are substituted into the formula:
F(x,y,z)＝-1.7*33.82+189*33.8+7.9*353.15+2155*2-1531.32
＝10014.617(s)。
under the condition of the heating time, the heating time can be accurately determined, the efficiency is improved, the performance required by the invention can be achieved, the efficiency is improved, and the occurrence of cable scrapping accidents can be reduced.
The straighter method saves time and labor and has obvious effect; a plurality of complex special devices are saved, the number of straight working procedures is less, and the operation difficulty can be effectively reduced; the heating is even controllable, and the homogeneity is good, can effectual elimination mechanical stress, avoids the rework that directly disqualification leads to, also the effectual cable of avoiding crosses fire, damages cable semi-conductive layer, insulating layer, even the condemned accident of cable.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made in the claims and the description of the present invention are within the scope of the present invention.
Claims (10)
1. A heating and straightening system for installing a cable accessory comprises a clamping pipe and a clamping device, and is characterized in that the clamping pipe consists of an upper clamp and a lower clamp, when the upper clamp and the lower clamp are connected, a clamping space for clamping a cable core to be straight is formed, and the clamping pipe is provided with a heating device; the clamping device is fixed on the outer side of the clamping pipe.
2. The system as claimed in claim 1, wherein a temperature sensor is disposed on an inner sidewall of the clamping space of the clamping tube, and the temperature sensor and the heating device are respectively connected to the controller.
3. The system of claim 2, wherein the jacket tube is wrapped around an insulating blanket.
4. The system as claimed in any one of claims 1 to 3, wherein the clamping device comprises a base, a locking plate and a handle, the base is provided with a pressing cavity for accommodating the clamping tube, the locking plate is movably mounted above the pressing cavity of the base in a vertical direction, the handle is mounted on the base, the handle is connected to the locking plate through a link mechanism and drives the locking plate to move in a vertical direction, so that the locking plate clamps the clamping tube in the pressing cavity of the base to press the clamping tube; and the base is provided with a locking block for fixing the locking plate.
5. The system as claimed in claim 4, wherein the number of the clamping devices is two or more, and the two clamping devices are respectively disposed at two ends of the clamping tube.
6. The system of claim 3, wherein the upper and lower clamps are axisymmetrically arranged, and each of the upper and lower clamps comprises an outer circular arc surface and an inner circular arc surface which are concentrically arranged and connected through a connecting end surface.
7. The system of claim 1, wherein a heating device is disposed in the interlayer between the outer circular arc surface and the inner circular arc surface, and the heating device is tightly attached to the inner circular arc surface.
8. The electrical cable accessory mounting, heating and straightening system as claimed in claim 7, wherein the heating means is a heating wire coiled on the inner surface of the inner arcuate surface.
9. The system of claim 1, wherein the temperature sensor is mounted in a mounting groove on an outer side of the inner arcuate surface.
10. The system of claim 1, wherein the inner arcuate surface is made of an aluminum alloy material; the outer circular arc surface is made of bakelite.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110524079.8A CN113315040A (en) | 2021-05-13 | 2021-05-13 | Cable accessories installation heating alignment system |
| AU2021106676A AU2021106676A4 (en) | 2021-05-13 | 2021-08-23 | Cable accessory mounting and heat straightening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110524079.8A CN113315040A (en) | 2021-05-13 | 2021-05-13 | Cable accessories installation heating alignment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113315040A true CN113315040A (en) | 2021-08-27 |
Family
ID=77373291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110524079.8A Pending CN113315040A (en) | 2021-05-13 | 2021-05-13 | Cable accessories installation heating alignment system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113315040A (en) |
| AU (1) | AU2021106676A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149469A (en) * | 2022-06-29 | 2022-10-04 | 宁波东方电缆股份有限公司 | Manufacturing process of ultrahigh-voltage direct-current 525kV wrapping fusion type soft joint |
-
2021
- 2021-05-13 CN CN202110524079.8A patent/CN113315040A/en active Pending
- 2021-08-23 AU AU2021106676A patent/AU2021106676A4/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149469A (en) * | 2022-06-29 | 2022-10-04 | 宁波东方电缆股份有限公司 | Manufacturing process of ultrahigh-voltage direct-current 525kV wrapping fusion type soft joint |
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| Publication number | Publication date |
|---|---|
| AU2021106676A4 (en) | 2021-11-11 |
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