CN114923773A - Steel wire cable quality inspection process for throwing and fishing unit - Google Patents
Steel wire cable quality inspection process for throwing and fishing unit Download PDFInfo
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- CN114923773A CN114923773A CN202210246597.2A CN202210246597A CN114923773A CN 114923773 A CN114923773 A CN 114923773A CN 202210246597 A CN202210246597 A CN 202210246597A CN 114923773 A CN114923773 A CN 114923773A
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- steel wire
- wire cable
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- steel
- cable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a steel wire cable quality inspection process for a throwing-fishing unit, which is characterized in that a 50m steel wire cable sample is obtained by intercepting, the steel wire spacing is measured every 5m, and the arrangement process is detected; drawing out the steel pipe in the sample piece by 100mm, externally connecting a hose to the steel pipe for injecting liquid, and testing the conductivity; sampling and selecting 1/3 outer layer steel wires to detect, connecting the outer layer steel wires with a tension tester at two left and right clamping positions respectively, starting the tension tester, recording the maximum bearing tension value when each outer layer steel wire is broken, and comparing the maximum bearing tension value obtained by testing with the allowable tension value of a single steel wire given by a factory; twisting the outer layer steel wire into one strand, connecting the twisted outer layer steel wire and the cable core with two probes on an insulation meter respectively, and testing the insulation performance between the outer layer steel wire and the cable core. Besides the conventional cable detection means, the detection of an outer layer steel wire arrangement process, the conductivity of a steel pipe in the steel wire cable, the strength of an outer layer steel wire and the insulation performance between the steel wire and a cable core is added.
Description
Technical Field
The invention relates to the technical field of steel wire inspection, in particular to a steel wire cable quality inspection process for a throwing and fishing unit.
Background
The steel wire cable is an armored cable and is generally used in occasions with large span and large laying fall. In the operation of the throwing and fishing type unit, the steel wire cable can transmit power and bear the weight of the unit through the outer layer steel wire pulling unit of the cable core.
Compared with the conventional cable, the steel wire cable needs to meet the indexes of normal electrical property (conductor direct current resistance, insulation resistance, alternating current withstand voltage), mechanical property (elongation at break, tensile strength and change rate) and size, and because the outer layer steel wire is connected with the bridle head in the process of pulling and running the unit and needs to bear the weight of the whole unit, the steel wire cable has higher requirement on the tensile strength and needs to detect the strength of the outer layer steel wire, and compared with the conventional cable, the steel wire cable needs to consider the insulation property between the steel wire and the cable core.
Simultaneously, the steel wire cable needs transmission hydraulic pressure for the expansion of hydraulic anchor is sealed on the unit, compares with conventional cable, and inside need set up the pressure transmission pipeline, needs the conductivity of test pipeline during quality testing.
Disclosure of Invention
The invention overcomes the defects in the prior art, the conventional cable quality inspection only needs to carry out quality inspection on indexes such as electrical property, mechanical property, size and the like, and cannot carry out detection on the strength of the outer layer steel wire and the insulation property between the steel wires and the cable cores, and provides the steel wire cable quality inspection process for the casting and fishing unit.
The purpose of the invention is realized by the following technical scheme.
A steel wire cable quality inspection process for a throwing and fishing unit is characterized in that a polyimide and an FEP sheath are coated on the outer side of a three-core conductor of a steel wire cable (namely a steel wire cable sample) for the throwing and fishing unit, the polyimide plays an insulating role, the FEP sheath mainly prevents abrasion and protects an insulating layer, a steel pipe is arranged on the outer side of the three-core conductor, and an insulating filler is arranged between the three-core conductor and the steel pipe for transmitting pressure parameters or using the steel wire cable during pouring operation; the outer sides of the three-core conductor and the steel pipe are provided with PP sheaths, and the outer sides of the PP sheaths are wound with nylon cloth belts; the outer side of the nylon woven belt is provided with an inner layer steel wire cable armor and an outer layer steel wire cable armor.
First, a steel cable was cut out to obtain a 50m steel cable sample.
The outer layer steel wire arrangement detection process comprises the following steps: starting from the intercepting end face of the steel wire cable sample piece, measuring the distance between every two outer steel wires at intervals of 5m, if the distance between the steel wires exceeds 2mm, the arrangement of the outer steel wires is unqualified, and if the distance between the steel wires is not more than 2mm, the arrangement of the outer steel wires is qualified.
The detection process for the conductivity of the steel pipe in the steel wire cable comprises the following steps: and (3) drawing out the steel pipe in the steel wire cable sample piece by 100mm from the cut end face of the steel wire cable sample piece, externally connecting a hose to the steel pipe, injecting liquid into the steel pipe through the hose, and if the liquid injected at the other end of the steel wire cable sample piece smoothly flows out and the liquid output is stable and free from fluctuation, determining the conductivity of the steel pipe in the steel wire cable to be qualified.
The process for detecting the insulation performance between the steel wires and the cable cores of the steel wire cable comprises the following steps: and (3) drawing out 150mm of the outer layer steel wire of the steel wire cable sample from the cut end face of the steel wire cable sample, twisting the outer layer steel wire into one strand, and connecting the twisted outer layer steel wire and a steel wire cable core respectively by using two probes on an insulation meter for testing the insulation performance between the outer layer steel wire and the cable core, wherein if the insulation is good, the steel wire-cable core insulation performance of the steel wire cable is qualified.
The outer layer steel wire strength detection process of the steel wire cable comprises the following steps: the method comprises the steps of sampling, selecting 1/3-number-occupied outer steel wires which are split into independent steel wires for detection, connecting each outer steel wire with a left clamping position and a right clamping position of a tension tester respectively, starting the tension tester, recording the maximum bearing tension value when each outer steel wire is broken, comparing the maximum bearing tension value obtained through testing with the allowable tension value of a given single steel wire leaving a factory, and in the outer steel wire strength detection process of the steel wire cable, if the maximum bearing tension value obtained through testing is larger than the allowable tension value of the given single steel wire leaving the factory and the safety factor of the maximum bearing tension value is more than 1.2, determining the outer steel wire strength of the steel wire cable to be qualified.
The invention has the beneficial effects that: (1) the outer layer steel wire is split into a plurality of independent steel wires, the left clamping position and the right clamping position of a tension tester are respectively fastened with the left end and the right end of the same steel wire, and the maximum bearing tension value of the steel wire when the steel wire is broken is recorded by applying acting force through the tension tester; (2) twisting the outer layer steel wire into one strand, respectively connecting the outer layer steel wire and the cable core by using two probes of an insulation meter, testing the insulation performance of the two points, and if the insulation is good, determining that the insulation performance between the steel wire cable and the cable core is qualified.
Drawings
FIG. 1 is a schematic structural view of a steel wire cable sample in the present invention;
fig. 2 is a side view of a sample wire cable of the present invention.
In the figure: 1 is the conductor, and 2 are polyimide, and 3 are FEP sheath, and 4 are the steel pipe, and 5 are insulating filling, and 6 are the PP sheath, and 7 are the nylon strap, 8 are the armor of inlayer steel wire, and 9 are outer steel wire armor.
For a person skilled in the art, without inventive effort, other relevant figures can be derived from the above figures.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Taking the cable model QYYFTPGGPTY of the loading submersible pump as an example:
(1) cable structure
1. Specification: 3X 16mm 2 (AWG5#)
A conductor: single core copper conductor
Outer diameter of the conductor: 4.62 (+ -1%) mm
PI insulation
Wrapping and sintering polyimide-F46 composite film
Thickness: 0.28mm
Outer diameter: 5.18 (. + -. 0.2) mm
FEP sheath
Thickness: 0.6mm
Outer diameter: 6.38 (. + -. 0.2) mm
4. Steel pipe
Specification: 6.35mm of outer diameter and 1.245mm of thickness
5. Cabling method
Center-filled insulation fill
6 PP protective sleeve
Thickness: 1.2mm
Outer diameter: 18.35 (. + -. 0.5) mm
7. Nylon cloth belt
Outer diameter: 18.75mm
8. Inner steel wire armor
The diameter of the steel wire: 2.0mm
Outer diameter: 22.75 (. + -. 0.5) mm
9. Outer layer steel wire armor
The diameter of the steel wire: 2.0mm
Outer diameter: 26.75 (. + -. 0.5) mm
(2) Technical Properties
1. Conductor direct current resistance: less than or equal to 1.15 omega/km (20 ℃);
2. main line core insulation resistance: more than or equal to 4110M omega-km (15.6 ℃);
3. cable main core test voltage: DC35kV/5 min;
4. leakage current: less than or equal to 0.25 muA/kV/km (15.6 ℃);
5. tensile breaking force of the steel wire: not less than 2 KN.
A steel wire cable quality inspection process for a throwing and fishing unit is characterized in that in order to prevent an outer layer of steel wires from being stranded due to manual saw blade cutting, a steel wire cable is cut by a grinding wheel cutting machine with a saw blade diameter of 400mm, wherein the saw blade diameter of the saw blade is 3000W, and a 50m steel wire cable sample is obtained;
the outer layer steel wire arrangement detection process comprises the following steps: measuring the spacing between every two outer steel wires at intervals of 5m from the cut end face of the steel wire cable sample piece, wherein if the spacing between the steel wires exceeds 2mm (QYYFTPGGPTY single-times outer layer steel wire diameter of the load-bearing submersible pump cable model), the steel wires are unqualified, and if the spacing between the steel wires is not more than 2mm (QYYFTPGGPTY single-times outer layer steel wire diameter of the load-bearing submersible pump cable model), the steel wires cannot be uniformly stressed when the steel wire cable is used, the steel wires are qualified;
the steel pipe conductivity detection process inside the steel wire cable comprises the following steps: starting from the cut end face of the steel wire cable sample piece, drawing out a steel pipe with the outer diameter of 6.35mm and the thickness of 1.245mm in the steel wire cable by 100mm, externally connecting a flexible pipe with the inner diameter of 6.5mm at the end of the steel pipe with the outer diameter of 6.35mm and the thickness of 1.245mm, fastening a stainless steel hose hoop, injecting liquid into the steel pipe through the flexible pipe, and obtaining qualified steel pipe if the steel pipe at the other end of the steel wire cable sample piece smoothly discharges liquid and the discharge amount is stable and free from fluctuation;
the process for detecting the insulation performance between the steel wires and the cable cores of the steel wire cable comprises the following steps: the method comprises the following steps of (1) extracting an outer layer steel wire by 150mm from an end face of a steel wire cable sample, twisting the outer layer steel wire into one strand, and connecting the twisted outer layer steel wire and a steel wire cable core respectively by using two probes on an insulation meter for testing the insulation performance between the outer layer steel wire and the cable core, wherein if the insulation is good (the reading of the insulation meter is infinite), the insulation performance between the steel wire and the cable core of the steel wire cable is qualified;
the outer layer steel wire strength detection process of the steel wire cable comprises the following steps: the method comprises the following steps of sampling, selecting 1/3-number-occupied split outer steel wires into independent outer steel wires for detection, connecting each outer steel wire with a left clamping position and a right clamping position of a tension tester respectively, starting the tension tester, recording a maximum bearing tension value when each outer steel wire is broken, comparing the maximum bearing tension value (3KN, 3.1KN, 3.6KN and 3.1 KN..) obtained by testing with a factory-given single steel wire allowable tension value (2KN), and if the maximum bearing tension value obtained by testing is larger than the factory-given single steel wire allowable tension value, and the safety coefficient reaches more than 1.2, wherein the safety coefficient of the embodiment is as follows: and if s is 3KN/2KN and 1.5, the strength of the outer layer steel wire of the steel wire cable is qualified.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. The utility model provides a steel wire cable quality testing technology for throwing and dragging machine group which characterized in that: cutting the steel wire cable by an electric tool to obtain a 50m steel wire cable sample piece;
the outer layer steel wire arrangement detection process comprises the following steps: measuring the spacing between every two steel wires of the outer layer every 5m from the cut end face of the steel wire cable sample piece, and detecting the arrangement process;
the steel pipe conductivity detection process inside the steel wire cable comprises the following steps: starting from the cut end face of the steel wire cable sample piece, drawing out a steel pipe in the steel wire cable sample piece by 100mm, externally connecting a hose to the steel pipe, injecting liquid into the steel pipe through the hose, and testing the conductivity;
the process for detecting the insulation performance between the steel wires and the cable cores of the steel wire cable comprises the following steps: drawing out 150mm of outer layer steel wires of the steel wire cable sample piece from the cut end face of the steel wire cable sample piece, twisting the outer layer steel wires into one strand, and connecting the twisted strand of outer layer steel wires with a steel wire cable core by using two probes on an insulation meter respectively for testing the insulation performance between the outer layer steel wires and the cable core;
the outer layer steel wire strength detection process of the steel wire cable comprises the following steps: the method comprises the steps of sampling, selecting 1/3 divided outer steel wires for detection, connecting each outer steel wire with a tension tester at left and right clamping positions respectively, starting the tension tester, recording the maximum tensile force value of each outer steel wire when the outer steel wire is broken, and comparing the maximum tensile force value obtained by testing with the allowable tensile force value of a given single steel wire leaving a factory.
2. The steel wire cable quality inspection process for the casting and fishing unit as claimed in claim 1, which is characterized in that: the outer side of a cable three-core conductor of a steel wire cable of the steel wire cable sample piece is coated with polyimide and an FEP (fluorinated ethylene propylene) sheath, the polyimide plays a role of insulation, the FEP sheath mainly prevents abrasion and protects an insulation layer, a steel pipe is arranged on the outer side of the three-core conductor, and in order to transmit pressure parameters or use the three-core conductor during pouring operation through the steel wire cable, an insulation filler is arranged between the three-core conductor and the steel pipe; a PP sheath is arranged on the outer sides of the three-core conductor and the steel pipe, and a nylon cloth tape is wound on the outer side of the PP sheath; an inner layer steel wire cable armor and an outer layer steel wire cable armor are arranged on the outer side of the nylon woven tape.
3. The steel wire cable quality inspection process for the casting and fishing unit as claimed in claim 1, which is characterized in that: in the outer layer steel wire arrangement detection process, if the distance between the steel wires exceeds 2mm, the outer layer steel wire arrangement is unqualified, and if the distance between the steel wires is not more than 2mm, the outer layer steel wire arrangement is qualified.
4. The steel wire cable quality inspection process for the throwing and fishing unit according to claim 1, characterized in that: in the process for detecting the conductivity of the steel pipe in the steel wire cable, if the liquid injected from the other end of the steel wire cable sample piece flows out smoothly and the liquid output is stable and free from fluctuation, the conductivity of the steel pipe in the steel wire cable is qualified.
5. The steel wire cable quality inspection process for the casting and fishing unit as claimed in claim 1, which is characterized in that: in the process for detecting the insulation performance between the steel wires and the cable cores of the steel wire cable, if the insulation is good, the insulation performance between the steel wires and the cable cores of the steel wire cable is qualified.
6. The steel wire cable quality inspection process for the throwing and fishing unit according to claim 1, characterized in that: in the outer layer steel wire strength detection process of the steel wire cable, if the maximum bearing tension values obtained by testing are all larger than the permitted tension values of the single steel wire given by factory production, and the safety coefficient of the maximum bearing tension values reaches more than 1.2, the outer layer steel wire strength of the steel wire cable is qualified.
7. The use of the process for the quality inspection of the steel wire cables of the throwing and fishing unit as claimed in any one of claims 1 to 6 for the steel wire inspection of the throwing and fishing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246597.2A CN114923773A (en) | 2022-03-14 | 2022-03-14 | Steel wire cable quality inspection process for throwing and fishing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246597.2A CN114923773A (en) | 2022-03-14 | 2022-03-14 | Steel wire cable quality inspection process for throwing and fishing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114923773A true CN114923773A (en) | 2022-08-19 |
Family
ID=82805613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210246597.2A Pending CN114923773A (en) | 2022-03-14 | 2022-03-14 | Steel wire cable quality inspection process for throwing and fishing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114923773A (en) |
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2022
- 2022-03-14 CN CN202210246597.2A patent/CN114923773A/en active Pending
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