CN106483160A - A kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) and detection method - Google Patents
A kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) and detection method Download PDFInfo
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- CN106483160A CN106483160A CN201610948402.3A CN201610948402A CN106483160A CN 106483160 A CN106483160 A CN 106483160A CN 201610948402 A CN201610948402 A CN 201610948402A CN 106483160 A CN106483160 A CN 106483160A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
Abstract
The invention discloses a kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) and detection method, detection means includes sealed container, zone of heating, temperature sensor, vacuum pump and air gauge；Described container includes inwall, outer wall and the interlayer being located between inner and outer wall；Described zone of heating is located in aforementioned interlayer；Described temperature sensor and barometric probe are located in container, for temperature and pressure in detection container；The air entry of described vacuum pump is located in container, for for manufacturing negative pressure in container.The detection means of the fuel-displaced phenomenon of PVC cable cover(ing) of the present invention can form negative pressure and high temperature in container, can speed up the precipitation of oil in PVC sheath, ensure in the short time, to realize the detection of the fuel-displaced phenomenon of PVC cable cover(ing), therefore effectively reduce cable fuel-displaced risk in use.
Description
Technical field
The present invention refers in particular to a kind of detection means and the detection method of the fuel-displaced phenomenon of PVC cable cover(ing).
Background technology
In the sheath material of electric wire, PVC material low cost, mechanical performance is excellent and easy to process, therefore for a long time
Since become the maximum material of wires and cables industry usage amount.Because the market competition is more and more fierce, a lot of PVC manufacturers are had to be
Profit-push, reduces cost, formula adds a large amount of Calcium Carbonate, but the extrusion quality of PVC to be ensured, have to increase
The consumption of plasticizer, when plasticizer consumption exceedes the limit that polyvinyl chloride resin can accommodate, under the high temperature conditions, will slowly analyse
Go out to cable surface, occurred as soon as fuel-displaced phenomenon.Because in PVC cable cover(ing), oils and fatss separate out very slow, inspection before therefore cable dispatches from the factory
Do not measure come, cable energising will be accelerated using later conductor temp.-elevating fuel-displaced, therefore cable using after one or two years find surface go out
Oil, largely effects on corporate reputation.It is thus desirable to developing new detection method, dummycable use environment and can be in the short time
Detect whether cable cover(ing) is fuel-displaced.
Content of the invention
First purpose of the present invention is the detection means providing a kind of fuel-displaced phenomenon of PVC cable cover(ing).
The technical scheme realizing first purpose of the present invention is a kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing), bag
Include sealed container, zone of heating, temperature sensor, vacuum pump and air gauge；Described container includes inwall, outer wall and is located at inwall
Interlayer and outer wall between；Described zone of heating is located in aforementioned interlayer；Described temperature sensor and barometric probe are located at and hold
In device, for temperature and pressure in detection container；The air entry of described vacuum pump is located in container, for negative for manufacturing in container
Pressure.
Described zone of heating is electrical heating.
Heat-insulation layer is set between described zone of heating and outer wall.
Described heat-insulation layer adopts polyurathamc insulation material.
The thickness of described heat-insulation layer is 15mm.
Described inner and outer wall adopts stainless steel material.
Second object of the present invention is the detection method providing a kind of fuel-displaced phenomenon of PVC cable cover(ing).
The technical scheme realizing second purpose of the present invention is a kind of detection method of the fuel-displaced phenomenon of PVC cable cover(ing), bag
Containing following steps：
Step one：Cable sample is put into container bottom, by the probe of temperature sensor, the air entry of vacuum pump and air pressure
The probe of table is placed in container, good seal container；
Step 2：By zone of heating, the temperature in container is heated to 90 ± 2 DEG C, and keeps；
Step 3：Open vacuum pump, container inner pressure is adjusted to 10 ± 1kPa, continue 48h；
Step 4：Wipe cable sample surface using oil-Absorbing Sheets, see whether oil precipitation.
Using technique scheme, patent of the present invention has following beneficial outcomes：
(1) detection means of the fuel-displaced phenomenon of PVC cable cover(ing) of the present invention can form negative pressure and high temperature, energy in container
The precipitation enough accelerating oil in PVC sheath is it is ensured that realize the detection of the fuel-displaced phenomenon of PVC cable cover(ing), therefore effectively in the short time
Reduce cable fuel-displaced risk in use.
(2) optimal temperature, pressure and time value, the long-term highest of PVC sheath cable are set in the method for the present invention
It is 90 DEG C using temperature, for the practical service environment condition of dummycable, therefore test temperature is defined as 90 DEG C, if examination
Test that temperature is too high, sheath occurs melting or the oils that normal use will not be able to be separated out separates out, thus affecting result of the test
Accuracy.Air pressure reduction can accelerate the precipitation of oils, and the speed that the lower oils of air pressure separates out is faster, testing time oversize meeting shadow
Ring production and the delivery of cable, the testing time is too short, some oils do not have enough time to separate out and lead to test result inaccurate, therefore
By substantial amounts of test result analysis, optimal experimental condition is container inner pressure 10 ± 1kPa, continues 48h, is result of the test
Reliability provide foundation.
Brief description
In order that present disclosure is easier to be clearly understood, below according to specific embodiment and combine accompanying drawing, right
The present invention is described in further detail, wherein：
Fig. 1 is the structural representation of apparatus of the present invention.
It is numbered in accompanying drawing：
Container 1, inwall 11, outer wall 12, zone of heating 2, temperature sensor 3, vacuum pump 4, air gauge 5, heat-insulation layer 6, cable
Sample 7.
Specific embodiment
(embodiment 1)
See Fig. 1, a kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) of the present embodiment it is characterised in that：Including sealing
Formula container 1, zone of heating 2, temperature sensor 3, vacuum pump 4 and air gauge 5；Container 1 includes inwall 11, outer wall 12 and is located at inwall
Interlayer between 11 and outer wall 12；Zone of heating 2 is located in aforementioned interlayer；The probe of temperature sensor 3 and air gauge 5 is located at container
In 1, for temperature and pressure in detection container；The air entry of vacuum pump 4 is located in container 1, for negative for manufacturing in container 1
Pressure.Zone of heating 2 is electrical heating.Heat-insulation layer 6 is set between zone of heating 2 and outer wall 12.Heat-insulation layer 6 adopts polyurathamc thermal insulating material
Material.The thickness of heat-insulation layer 6 is 15mm.Inwall 11 and outer wall 12 adopt stainless steel material.
Detection method comprises the steps of：
Step one：Cable sample 7 is put into container 1 bottom, by the probe of temperature sensor 3, the air entry of vacuum pump 4 and
The probe of air gauge 5 is placed in container 1, good seal container 1；
Step 2：By zone of heating 2, the temperature in container 1 is heated to 90 ± 2 DEG C, and keeps；
Step 3：Open vacuum pump 4, pressure in container 1 is adjusted to 10 ± 1kPa, continue 48h；
Step 4：Wipe cable sample 2 surface using oil-Absorbing Sheets, see whether oil precipitation.
Particular embodiments described above, has carried out entering one to the purpose of patent of the present invention, technical scheme and beneficial effect
Step describes in detail, be should be understood that the specific embodiment that the foregoing is only the present invention, is not limited to this
Bright, all any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included in the present invention
Protection domain within.
Claims (7)
1. a kind of fuel-displaced phenomenon of PVC cable cover(ing) detection means it is characterised in that：Including sealed container (1), zone of heating
(2), temperature sensor (3), vacuum pump (4) and air gauge (5)；Described container (1) includes inwall (11), outer wall (12) and is located at
Interlayer between inwall (11) and outer wall (12)；Described zone of heating (2) is located in aforementioned interlayer；Described temperature sensor (3) and
The probe of air gauge (5) is located in container (1), for temperature and pressure in detection container；The air entry position of described vacuum pump (4)
In container (1), for for manufacturing negative pressure in container (1).
2. a kind of fuel-displaced phenomenon of PVC cable cover(ing) according to claim 1 detection means it is characterised in that：Described plus
Thermosphere (2) is electrical heating.
3. a kind of fuel-displaced phenomenon of PVC cable cover(ing) according to claim 2 detection means it is characterised in that：Described plus
Setting heat-insulation layer (6) between thermosphere (2) and outer wall (12).
4. a kind of fuel-displaced phenomenon of PVC cable cover(ing) according to claim 3 detection means it is characterised in that：Described guarantor
Warm layer (6) adopts polyurathamc insulation material.
5. a kind of fuel-displaced phenomenon of PVC cable cover(ing) according to claim 4 detection means it is characterised in that：Described guarantor
The thickness of warm layer (6) is 15mm.
6. a kind of fuel-displaced phenomenon of PVC cable cover(ing) according to claim 5 detection means it is characterised in that：Described interior
Wall (11) and outer wall (12) adopt stainless steel material.
7. a kind of fuel-displaced phenomenon of PVC cable cover(ing) detection method it is characterised in that：Using the detection dress described in claim 6
Put, comprise the steps of：
Step one：Cable sample (7) is put into container (1) bottom, by the air-breathing of the probe of temperature sensor (3), vacuum pump (4)
The probe of mouth and air gauge (5) is placed in container (1), good seal container (1)；
Step 2：By zone of heating (2), the temperature in container (1) is heated to 90 ± 2 DEG C, and keeps；
Step 3：Open vacuum pump (4), interior for container (1) pressure is adjusted to 10 ± 1kPa, continue 48h；
Step 4：Wipe cable sample (2) surface using oil-Absorbing Sheets, see whether oil precipitation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610948402.3A CN106483160A (en) | 2016-10-26 | 2016-10-26 | A kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) and detection method |
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| CN201610948402.3A CN106483160A (en) | 2016-10-26 | 2016-10-26 | A kind of detection means of the fuel-displaced phenomenon of PVC cable cover(ing) and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340267A (en) * | 2017-06-06 | 2017-11-10 | 远东电缆有限公司 | PVC sheath material seepage-proof oil method of testing |
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