CN212364188U - Cable outer protective layer detection device - Google Patents
Cable outer protective layer detection device Download PDFInfo
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- CN212364188U CN212364188U CN202021080077.1U CN202021080077U CN212364188U CN 212364188 U CN212364188 U CN 212364188U CN 202021080077 U CN202021080077 U CN 202021080077U CN 212364188 U CN212364188 U CN 212364188U
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Abstract
The utility model relates to a cable outer protective layer detection device, which comprises a bottom box with an upward groove, a buckle box, an ultrasonic probe, a first U-shaped opening side plate, a first U-shaped leakage-proof gasket, a first positioning clip, a second U-shaped leakage-proof gasket and a second U-shaped opening side plate, wherein the first U-shaped opening side plate, the first U-shaped leakage-proof gasket, the first positioning clip, the second U-shaped leakage-proof gasket and the second U-shaped; the opening directions of the first U-shaped opening side plate and the first U-shaped leakage-proof gasket are opposite, and the opening directions of the second U-shaped opening side plate and the second U-shaped leakage-proof gasket are opposite; the buckling box is arranged above the bottom box, the buckling box is arranged between the first positioning clamp and the second positioning clamp, the cylindrical through hole is formed in the middle of the buckling box, the ultrasonic probe is inserted into the cylindrical through hole, and the ultrasonic probe is used for detecting the thickness of the outer protective layer of the cable. Ultrasonic detection is carried out through the probe, so that artificial errors are reduced, and the detection efficiency is improved.
Description
Technical Field
The utility model relates to a cable material detects technical field, especially relates to a cable outer jacket detection device.
Background
Polyethylene (PE) material is the primary jacket material for telecommunication cables. In order to reduce the production cost, enterprises in recent years often use a large amount of poor-quality recycled PE materials as cable protective layer materials, so that the quality of the cables is frequently problematic. The most direct test method for the quality of the outer sheath of the cable at present is to detect the thickness of the sheath material by a caliper tool, and the method is performed according to the 8 th part in GB/T2951.11. However, the standard does not provide an accurate method for preparing a sheath thickness sample, and currently, for the detection of the thickness of the cable sheath, a manual operation mode is generally adopted, and a blade is used for stripping the sheath, so that the method needs to damage a detection object, and the detection result is inaccurate and poor in repeatability due to irregular stripped samples, and the detection efficiency is very low, and the method has no operability during the quality detection of the long-distance cable sheath. The laying distance of the cable is long, the complete sample is mostly several to dozens of kilometers, the outer protective layer of the cable is damaged by a manual blade stripping method, and the requirements of current production, application and detection cannot be met.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing a cable outer jacket detection device carries out ultrasonic detection through the probe, reduces artificial error, improves detection efficiency.
In order to achieve the above object, the utility model provides a following scheme:
a cable outer protective layer detection device comprises a bottom box with an upward opening groove, a buckle box, an ultrasonic probe, a first U-shaped opening side plate, a first U-shaped leakage-proof gasket, a first positioning clamp, a second U-shaped leakage-proof gasket and a second U-shaped opening side plate, wherein the first U-shaped opening side plate, the first U-shaped leakage-proof gasket, the first positioning clamp, the second U-shaped leakage-proof gasket and the second U-shaped opening side; the opening directions of the first U-shaped opening side plate and the first U-shaped leakage-proof gasket are opposite, and the opening directions of the second U-shaped opening side plate and the second U-shaped leakage-proof gasket are opposite; the buckling box is arranged above the bottom box, the buckling box is arranged between the first positioning clamp and the second positioning clamp, a cylindrical through hole is formed in the middle of the buckling box, the ultrasonic probe is inserted into the cylindrical through hole, and the ultrasonic probe is used for detecting the thickness of the outer protective layer of the cable.
Optionally, a coupling agent is filled in the bottom box, and the coupling agent includes purified water, homogeneous grease and alcohol with a concentration equal to or greater than 95%.
Optionally, the ultrasonic probe is connected to a display, and the display is used for displaying the detection data of the ultrasonic probe.
Optionally, the buckle box is made of plastic.
Optionally, the buckle box is of a quadrangular frustum pyramid shape.
Optionally, the center of the cylindrical through hole of the buckle box is provided with a cross scale mark.
Optionally, the first U-shaped leakproof gasket and the second U-shaped leakproof gasket are made of plastic.
Optionally, the first positioning clip and the second positioning clip are U-shaped positioning clips.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model discloses a cable outer jacket detection device, through the end box that is equipped with the opening recess that makes progress, detain the box and insert once first U type opening curb plate, first U type leak protection gasket, first positioning clip, second U type leak protection gasket and the fixed cable that awaits measuring of second U type opening curb plate in the recess, and the cable that awaits measuring can remove on cable radial direction, detects the cable that awaits measuring in real time through ultrasonic probe, has reduced human error, has improved the detection efficiency of cable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of a cable outer sheath detection device according to an embodiment of the present invention;
FIG. 2 is a left side view of the first U-shaped opening side plate and the second U-shaped opening side plate according to the embodiment of the present invention;
FIG. 3 is a left side view of the first U-shaped anti-leakage gasket and the second U-shaped anti-leakage gasket according to the embodiment of the present invention;
fig. 4 is a left side view of the first positioning clip and the first positioning clip according to the embodiment of the present invention;
FIG. 5 is a left side view of the bottom case of the embodiment of the present invention;
FIG. 6 is a left side view of the bottom case, the first U-shaped opening side plate, the first U-shaped leakage-proof gasket, the first positioning clip, the second U-shaped leakage-proof gasket and the second U-shaped opening side plate according to the embodiment of the present invention;
fig. 7 is a top view of the buckle case according to the embodiment of the present invention;
FIG. 8 is a top view of a bottom case according to an embodiment of the present invention;
fig. 9 is an assembly plan view of the bottom case and the buckle case according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a cable outer casing detection device carries out ultrasonic detection through the probe, reduces artificial error, improves detection efficiency.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The utility model discloses utilize the ultrasonic wave at the acoustics characteristic of Polyethylene (PE) outer jacket layer material, through contrast known standard outer jacket sample with wait to detect the difference of outer jacket sample testing result, wait to detect under the condition of outer jacket sample at the not damage, distinguish fast whether the material that waits to detect the outer jacket sample and use is inferior material.
Fig. 1 is a schematic structural view of a cable outer sheath detection device, and as shown in fig. 1, the device includes a bottom box 5 provided with a groove with an upward opening, a buckle box 8, an ultrasonic probe 9, a first U-shaped opening side plate 2, a first U-shaped leakage-proof gasket 3, a first positioning clip 4, a second U-shaped leakage-proof gasket 3 and a second U-shaped opening side plate 2, which are sequentially inserted into the groove; 2-9 are left side views and assembly views of the components of the device, as shown in FIGS. 2-9, the opening directions of the first U-shaped opening side plate 2 and the first U-shaped leakage-proof gasket 3 are opposite, and the opening directions of the second U-shaped opening side plate 2 and the second U-shaped leakage-proof gasket 3 are opposite; detain box 8 and set up in end box 5 top, detain box 8 and set up between first location checkpost 4 and second location checkpost 4, detain box 8 middle part and be equipped with the cylindricality through-hole, the cylindricality through-hole is used for ultrasonic probe 9 to insert and fixed, and ultrasonic probe 9 is used for detecting the thickness of cable outer jacket 1.
In the recess of box 5 at the bottom of the closely knit inserting of first U type opening curb plate 2 and second U type opening curb plate 2 for the fixed testee of placing, be used for the fixed communication cable 7 of placing promptly, communication cable 7 is for waiting to detect the outer jacket sample, and communication cable 7 is cylindrical, and the outside has wrapped up the outer jacket 1 of the even thickness of one deck.
The groove of the bottom box 5 is filled with a couplant 6, and the couplant 6 comprises purified water, homogeneous grease and alcohol with the concentration equal to or more than 95%. The couplant 6 covers the communication cable 7 to be measured, so that the thickness of the outer protective layer 1 of the communication cable 7 can be measured accurately. During detection, the ultrasonic probe 9 extends into the couplant 6.
If the outer protective layer 1 of the communication cable 7 is smooth, the couplant 6 is directly selected from purified water or 95% alcohol; if the outer protective layer 1 of the communication cable 7 is rough, the coupling agent 6 is ointment or homogeneous grease for communication; the couplant 6 is filled in the groove of the bottom box 5 until the upper surface of the outer protective layer 1 of the communication cable 7 is covered and is 1-2 mm higher, so that the end part of the ultrasonic probe 9 is fully and uniformly contacted with the couplant.
First U type leak protection gasket 3 hugs closely on outer jacket 1 and with the compaction of first U type opening curb plate 2, and second U type leak protection gasket 3 hugs closely on outer jacket 1 and with the compaction of second U type opening curb plate 2, prevents that detection reagent (couplant 6) from spilling from between first U type opening curb plate 2 and second U type opening curb plate 2.
First locator card 4 and the pressfitting of first U type leak protection gasket 3, second locator card 4 and the pressfitting of second U type leak protection gasket 3 play the fixed effect of being surveyed communication cable 7 with first U type opening curb plate 2, second U type opening curb plate 2, end box 5 and knot box 8 jointly.
The ultrasonic probe 9 is connected with the display 10, the display 10 is used for displaying detection data of the ultrasonic probe 9, the display 10 displays the detection data of the outer protective layer 1 in real time, the detection data comprise Young elastic modulus E, density rho and Poisson ratio u of the outer protective layer 1, during detection, the communication cable 7 is rotated in the direction of an angle ruler, the thickness of any point of the outer protective layer 1 on the section of the communication cable 7 can be read, through radial sliding of the communication cable 7, the detection data of any point in the radial direction of the outer protective layer 1 can be read in real time, and when the communication cable slides in the radial direction, the couplant 6 needs to be paid attention to, so that the ultrasonic probe 9 is ensured to be fully contacted with. The monitoring interface of the display 10 can monitor the thickness data of the outer protective layer 1 in real time, monitor the distance when the sample moves back and forth in real time, and can display and input the thickness values required by the standard, the sound velocity, the density and the like by using a plurality of groups of thickness values (6 groups at most) of the same section when the sample is rotated along the central axis.
The buckle box 8 is made of plastic materials, and the buckle box 8 is of a quadrangular frustum pyramid shape. In order to fix various detection ultrasonic probes 9, the buckle box 8 is replaced according to the corresponding specifications of various ultrasonic probes 9. Because the outer protective layer 1 of the tested communication cable 7 is mainly made of black polyethylene PE, flame-retardant polyolefin, polyurethane or modified polypropylene and other plastics, the buckle box 8 is made of plastic materials and can be fixed and tightly attached to the outer protective layer 1, and the outer surface of the tested outer protective layer 1 is not easily scratched. The cylindrical through hole of the buckle box 8 is a rectangular frustum pyramid right middle part which is a vertical hollow cylinder, so that the ultrasonic probe 9 with the corresponding diameter can be conveniently inserted and fixed, the ultrasonic probe 9 is ensured to be stable and not to shake during testing, the ultrasonic probe 9 really needs to go deep into the couplant 6, and the buckle box 8 is fixed to ensure that the detection is carried out on the outer protective layer by a vertical angle. The center of the cylindrical through hole of the buckle box 8 is provided with a cross scale mark. The cross scale mark is positioned at the center of the cylindrical through hole of the buckle box 8 and is a mark which plays a role of centering the core, and after the ultrasonic probe 9 is inserted every time, whether the ultrasonic probe 9 is centered is checked through the scale mark.
The first U-shaped leakage-proof gasket 3 and the second U-shaped leakage-proof gasket 3 are made of plastic materials.
The first positioning clip 4 and the second positioning clip 4 are both U-shaped positioning clips.
According to the diameter (generally, the diameter is divided into 25mm below and 25mm above) of the communication cable 7, the first positioning clip 4 and the second positioning clip 4 (the types of the first positioning clip 4 and the second positioning clip 4 are based on the groove diameter of the positioning clip, including but not limited to 10mm, 12mm, 14mm, 16mm, 20mm, 25mm, 30mm and 40 mm') with the specification corresponding to the sample diameter are selected.
The utility model provides a cable outer jacket detection device is applicable to the in-service use of cable for communication, and the detection of optical cable sheath thickness not only is limited to Polyethylene (PE) sheath material, lays the environment to actual communication optical cable simultaneously, and multiple macromolecular material is like the thickness measurement of polypropylene sheath, nylon sheath, polycarbonate sheath and all can develop the detection.
The following describes a detection method of the cable outer protective layer detection device according to the present invention.
1. Before testing, a standard substance (the standard substance is a traceable substance and has a qualified certificate, and is usually provided by an equipment manufacturer when equipment leaves a factory) is selected, an ultrasonic probe with a proper frequency band (the conventional frequency is 2.5 to 5MHz, but in some polyolefin outer protective layer materials, inorganic combustion improver components are possibly added, the conventional ultrasonic probe is needed, the peak end of the corresponding value of the conventional ultrasonic probe is lower, the resolution ratio of detection is influenced, the test error is increased, the ultrasonic probe with higher frequency is needed to be used at the moment, namely 7.5MHz and above, the specific selection and the consideration are needed according to the actual situation), a detection system is calibrated through the standard substance, and the detection system comprises all parts in the cable outer protective layer detection device; the calibration procedure for the detection system is as follows: a. directly testing the thickness of the standard substance without using an ultrasonic probe (a general calibration method, which can be performed with reference to the instructions for the use of the ultrasonic probe); b. the standard substance is put into the device of the utility model to be radially pulled for testing, and the temperature during the test is the room temperature; c. and comparing the test results of the two times of a and b, wherein the test deviation is within the uncertainty range of the test deviation of the standard substance, and the system is considered to be calibrated.
2. Preparing a homogeneous black polyethylene outer protective layer standard sample with known carbon black content (the standard sample refers to a known sample meeting the national and industrial standard requirements), detecting the known black polyethylene outer protective layer standard sample according to the device operation steps, and confirming the acoustic characteristic index of the standard sample:
the sound velocity of the standard sample of the black polyethylene outer protective layer is as follows: C1.
the effective response time of the detection of the standard sample of the black polyethylene outer protective layer is as follows: t1.
Density of standard sample of black polyethylene outer sheath: rho 1(0.95 +/-0.1 g/cm)3)。
Impedance of standard sample of black polyethylene outer sheath: z1 ═ ρ 1 × C1.
3. Detecting the acoustic index of the sample to be detected of the outer protective layer according to the device operation steps:
detecting sound velocity of the sample of the outer protective layer to be detected: C2.
the effective response time of the detection of the sample of the outer protective layer to be detected is as follows: t2.
Density of sample to be tested for outer sheathDegree: rho 2(0.95 +/-0.1 g/cm)3)。
Impedance of the sample of the outer protective layer to be detected: z2 ═ ρ 2 × C2.
4. The supersonic principle formula and symbols used are explained as follows:
1) the outer jacket thickness formula of the sample: d ═ C × Δ t.
Impedance versus speed of sound formula: z ═ ρ × C.
D: thickness of the outer sheath of the sample.
C: the propagation velocity of the ultrasonic waves in the sample.
Δ t: the response time of the effective sound speed is generally expressed by an average value of the incident sound speed response time and the reflected sound speed response time.
Z: acoustic impedance of the sample is inherent property of the sample, and is used as a reference index in the detection process, and the acoustic impedance participates in calibration of a detection system and also participates in evaluation of uncertainty of a detection result; generally, the higher the density of the homogeneous sample, the higher the acoustic impedance, and the higher the frequency band of the probe selected for detection.
Δ t ═ 2 (incident sound speed response time + reflected sound speed response time).
T1 is (incident sound velocity response time of the standard sample of black polyethylene outer sheath + reflection sound velocity response time of the standard sample of black polyethylene outer sheath)/2.
T2 ═ 2 (response time of incident sound velocity of the sample of the outer jacket to be detected + response time of reflected sound velocity of the sample of the outer jacket to be detected).
2) The relation formula between the ultrasonic sound velocity and the elastic modulus, the material density and the Poisson ratio of the sample of the outer protective layer to be detected is as follows:
wherein, C: propagation speed of ultrasonic wave in the sample of the outer sheath to be detected, E: young's modulus of elasticity, rho: density of the sample of the outer sheath to be detected, u: and detecting the Poisson's ratio of the sample of the outer protective layer to be detected.
5. And (3) analyzing according to the actual detection condition: in national and industrial standards, the thickness of the sheath of the communication cable ranges between 0.2mm and 3mm, under which conditions:
1) single system analysis (example):
the known conditions are: when the transverse u is approximately equal to o, the formula of ultrasonic sound velocity is substituted
If the default is that the difference of the effective response time of the ultrasonic wave in the standard substance, the known standard sample and the sample of the outer protective layer to be detected is ignored, namely: Δ t0 (standard substance) ═ Δ t1 (standard outer sheath sample) ═ Δ t2 (outer sheath sample to be detected).
The method deduces that: when the outer protective layer material is made of inferior materials, inorganic fillers such as calcium powder, phosphide, ash and the like in the polyethylene outer protective layer material are increased.
a) And when the plasticity of the sample of the outer protective layer to be detected is reduced, the elastic modulus E of the sample is reduced.
b) Meanwhile, due to the addition of the inorganic filler, the overall density rho of the unknown polyethylene outer protective layer material is increased.
At this time according to the formula
Then push out its C fall accordingly: namely: c1 > C2. Then D1 ═ (C1 Δ t1) > D2 ═ C2 Δ t 2. Namely, the thickness of the protective layer of the known standard outer protective layer sample is larger than that of the outer protective layer of the sample to be detected.
And (4) analyzing and concluding: and whether the sample of the outer protective layer to be detected adopts an inferior material can be reflected by directly comparing the detection results.
2) Multifactor analysis (example): a plurality of influence factors such as effective response time are considered.
The known conditions are: the lateral u of the Polyethylene (PE) outer sheath material is still default to approximately o, but the difference in effective response time is considered.
The deduction method comprises the following steps: the same single system analysis.
And (4) analyzing and concluding:
a) and when D1 is more than D2 and delta t1 is less than or equal to delta t2, the sample of the outer protective layer to be detected is a poor sample.
b) When D1 is D2 and delta t1 is less than delta t2, the sample of the outer protective layer to be detected is a poor sample.
When D1 is less than D2, and delta t1 is greater than delta t2, the sample of the outer protective layer to be detected is a poor sample.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. The device for detecting the outer protection layer of the cable is characterized by comprising a bottom box, a buckle box, an ultrasonic probe, a first U-shaped opening side plate, a first U-shaped leakage-proof gasket, a first positioning clamp, a second U-shaped leakage-proof gasket and a second U-shaped opening side plate, wherein the bottom box is provided with a groove with an upward opening; the opening directions of the first U-shaped opening side plate and the first U-shaped leakage-proof gasket are opposite, and the opening directions of the second U-shaped opening side plate and the second U-shaped leakage-proof gasket are opposite; the buckling box is arranged above the bottom box, the buckling box is arranged between the first positioning clamp and the second positioning clamp, a cylindrical through hole is formed in the middle of the buckling box, the ultrasonic probe is inserted into the cylindrical through hole, and the ultrasonic probe is used for detecting the thickness of the outer protective layer of the cable.
2. The cable outer sheath detection device according to claim 1, wherein a couplant is filled in the bottom case, and the couplant comprises purified water, homogeneous grease and alcohol with a concentration equal to or greater than 95%.
3. The cable outer sheath detection device according to claim 1, wherein the ultrasonic probe is connected to a display, and the display is used for displaying detection data of the ultrasonic probe.
4. The cable jacket detection device of claim 1, wherein the buckle box is made of plastic.
5. The cable jacket detection device of claim 1, wherein the buckle box is of a quadrangular frustum pyramid shape.
6. The cable outer sheath detection device according to claim 1, wherein a cross-shaped scale mark is provided at the center of the cylindrical through hole of the buckle box.
7. The cable outer sheath detection device of claim 1, wherein the first U-shaped leak-proof gasket and the second U-shaped leak-proof gasket are made of plastic.
8. The cable outer sheath detection device according to claim 1, wherein the first positioning clip and the second positioning clip are both U-shaped positioning clips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080077.1U CN212364188U (en) | 2020-06-12 | 2020-06-12 | Cable outer protective layer detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080077.1U CN212364188U (en) | 2020-06-12 | 2020-06-12 | Cable outer protective layer detection device |
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| CN212364188U true CN212364188U (en) | 2021-01-15 |
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| CN202021080077.1U Active CN212364188U (en) | 2020-06-12 | 2020-06-12 | Cable outer protective layer detection device |
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