CN216525240U - Submarine cable aging test device under temperature gradient effect - Google Patents
Submarine cable aging test device under temperature gradient effect Download PDFInfo
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- CN216525240U CN216525240U CN202123032228.3U CN202123032228U CN216525240U CN 216525240 U CN216525240 U CN 216525240U CN 202123032228 U CN202123032228 U CN 202123032228U CN 216525240 U CN216525240 U CN 216525240U
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Abstract
The utility model discloses a submarine cable aging test device under the action of a temperature gradient, and relates to the field of submarine cable test devices. The existing power cable thermal aging test cannot well simulate the simulation effect of the actual operation environment of the submarine cable under the action of temperature gradient. The utility model comprises an inner container, an outer container, a large current generating device, a cable support, a temperature sensor and a heating device, wherein the cable support is arranged in the inner container, the temperature sensor, the heating device and the inner container are all arranged in the outer container, the inner container and the outer container are provided with through holes for penetrating core wires of a test cable, and the outer container is provided with a water inlet and a water outlet. The device can conveniently simulate different water temperature environment simulation in a seawater environment, effectively simulate the thermal degradation condition of the aging test under the action of the outward gradient temperature from the center of the core wire in the actual operation environment of the submarine cable, and make up the defect of uneven degradation of the main insulation of the power cable caused by the traditional accelerated thermal aging test.
Description
Technical Field
The utility model relates to the field of submarine cable test devices, in particular to a submarine cable aging test device under the action of a temperature gradient.
Background
Crosslinked polyethylene cables are the core electrical devices for the transmission of electrical energy in electrical power systems. In the actual operation process, the crosslinked polyethylene cable is easily affected by electrical stress, thermal stress, mechanical stress, environmental factors and the like to gradually deteriorate, so that the electrical property, the physical and chemical properties and the mechanical property of the crosslinked polyethylene cable are gradually reduced, and the insulation failure of the crosslinked polyethylene is easily caused. In the long-term overload operation, the submarine cable insulation is always in an overheat environment, and the insulation thermal degradation and failure of the submarine cable are accelerated. Therefore, effective evaluation of the insulation thermal aging state of the crosslinked polyethylene cable is carried out, and the method has important significance for ensuring safe and stable operation of the cable.
Through research summary, the existing power cable thermal aging test research mainly has the following defects and pain points:
the thermal aging test mainly places the power cable body in a thermal aging box to carry out the accelerated thermal aging test, and the thermal degradation process of the main insulation crosslinked polyethylene of the power cable is in opposite development, namely, the core of the power cable generates heat, the metal atoms of the core accelerate the outward degradation of the insulation of the crosslinked polyethylene, and the outer sheath of the power cable generates heat to accelerate the inward degradation of the insulation of the crosslinked polyethylene, so that the main insulation of the cable body is degraded unevenly, the micro-interfaces are increased, and the like. The phenomenon is particularly remarkable in the accelerated thermal aging process of the crosslinked polyethylene power cable with the voltage level of more than 110kV in a laboratory. However, the heat generated by the cable in actual operation is diffused from the conductor to present a gradient distribution.
At present, research is mainly carried out on accelerated thermal aging tests of land cables, although a few scholars carry out submarine cable thermal aging tests, the actual operation environment of submarine cables is not considered, namely the influence of the seawater environment on the thermal aging tests.
Therefore, how to simulate the actual operation environment of the submarine cable, realizing the simulation effect under the action of the temperature gradient and well solving the problems of the existing cable thermal aging test simulation system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems and provide a technical task for perfecting and improving the prior technical scheme and providing a submarine cable aging test device under the action of temperature gradient so as to achieve the aging test of simulating the actual operating environment of a submarine cable. Therefore, the utility model adopts the following technical scheme.
The utility model provides a submarine cable aging test device under temperature gradient effect, is including the inner container that is used for holding the sea water, the outer container that is used for carrying on water circulation, be used for connecting the test cable and in order to realize the heavy current generating device of current simulation under the operating condition, be used for supporting the cable support of placing the test cable, be used for carrying on temperature monitoring's temperature sensor and be used for the device that generates heat of temperature regulation, the cable support locate in the inner container and be used for supporting and placing the test cable, the inner container locate in the outer container, temperature sensor and the device that generates heat set up in the outer container, the horizontal both ends face of inner container and outer container be equipped with and be used for passing interior through hole and the outer through hole of the heart yearn of test cable, the outer container be equipped with water inlet and delivery port, inner container and outer container between airtight isolation. During testing, the outer insulating layers are stripped at two ends of a test cable, only core wires are reserved, then the part of the test cable, which is reserved with the outer insulating layers, is arranged on a cable support of an inner container, the core wires at the two ends penetrate through an inner through hole and an outer through hole from two sides, after sealing, a large current generating device is connected, seawater is contained in the inner container, the test cable is fully covered, circulating water is injected into the outer container through a water inlet, a heating device is started, the water temperature is sensed through a temperature sensor, the environmental water temperature is regulated, when temperature needs to be reduced, the water circulation mode is adopted, the water temperature in the outer container is reduced to the required temperature, the large current generating device is started to carry out simulated aging tests, the device can conveniently simulate different water temperature environment simulation under the seawater environment, and can effectively simulate the thermal degradation condition of the aging tests under the action of gradient temperature from the center of the core wires to the outside under the actual operating environment of the submarine cable, the defect of uneven main insulation degradation of the power cable caused by the traditional accelerated thermal aging test is overcome.
As a preferable technical means: the height of the inner container is 5-20cm lower than that of the outer container. The inner container is fully immersed in the water of the outer container, and the heat conduction is more complete and uniform.
As a preferable technical means: the inner container is an openable closed container. The water bodies of the inner container and the outer container are prevented from being mixed, so that the heat conduction is more uniform.
As a preferable technical means: the inner container comprises an inner container body and an inner upper cover part, the inner upper cover part comprises an inner top plate and two inner side upper plates which are oppositely arranged, an inner through hole is formed by combining an arc-shaped shallow groove at the lower end of the inner side upper plate and an arc-shaped deep groove on the inner container body to form a circular through hole, an openable seawater injection hole cover is arranged on the inner top plate of the inner upper cover part, during a test, a core wire of a test cable is clamped into the arc-shaped deep groove of the inner container body from top to bottom, then the inner upper cover part is used for covering, the connecting part of the inner container body and the inner upper cover part and the core wire through hole are sealed by using a sealing part, and finally seawater is injected. The test cable can be conveniently placed and sealed.
As a preferable technical means: the outer container be including the outer container body and the closed container of outer upper cover piece, outer upper cover piece including outer roof and two outside upper plates that set up relatively, outer through hole arc shallow slot by outside upper plate lower extreme and the arc deep groove combination on the outer container body form circular through hole, during the experiment, the heart yearn of experimental cable is from last down to go into the arc deep groove of the outer container body in, then close with outer upper cover piece lid, the connection site and the heart yearn perforation department of the sealed outer container body of reuse sealing member and outer upper cover piece. The test cable can be conveniently placed and sealed.
Has the advantages that: the device can conveniently simulate different water temperature environment simulation in a seawater environment, effectively simulate the thermal degradation condition of the aging test under the action of the outward gradient temperature from the center of the core wire in the actual operation environment of the submarine cable, and make up the defect of uneven degradation of the main insulation of the power cable caused by the traditional accelerated thermal aging test.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention.
Fig. 2 is a schematic view of the structure of the inner container in the present invention.
Figure 3 is a schematic diagram of the outer container structure of the present invention.
In the figure: 1. an inner container; 2. an outer container; 3. testing the cable; 4. a core wire; 5. a cable holder; 6. a large current generating device; 7. a water inlet; 8. a water outlet; 101. an inner container body; 102. an inner upper cover member; 103. a seawater injection hole cover; 104. an inner through hole is formed; 201. an outer container body; 202. an outer upper cover member; 203. and the outer through hole is formed.
Detailed Description
The technical scheme of the utility model is further explained in detail by combining the drawings in the specification.
As shown in figure 1, the sea cable aging test device under the action of the temperature gradient comprises an inner container 1 for containing sea water, an outer container 2 for carrying out water circulation, a large current generating device 6 for connecting a test cable 3 to realize current simulation in a working state, a cable bracket 5 for supporting and placing the test cable 3, a temperature sensor for carrying out temperature monitoring and a heating device for temperature regulation, wherein the cable bracket 5 is arranged in the inner container 1 for supporting and placing the test cable 3, the inner container 1 is arranged in the outer container 2, the temperature sensor and the heating device are arranged in the outer container 2, the inner through hole 104 and the outer through hole 203 for passing through the core wire 4 of the test cable 3 are arranged on the two transverse end faces of the inner container 1 and the outer container 2, the outer container 2 is provided with the water inlet 7 and the water outlet 8, and the inner container 1 and the outer container 2 are sealed and isolated.
The height of the inner container 1 is lower than the outer container 25-20cm for overall and uniform heat conduction. The inner container 1 is fully immersed in the water of the outer container 2, and the heat conduction is full and uniform.
In order to make the heat conduction more uniform, the inner container 1 is an openable closed container. The water bodies of the inner container 2 and the outer container 2 are prevented from being mixed, so that the heat conduction is more uniform.
In order to facilitate the placement and sealing of the test cable 3 in the inner container 1, as shown in fig. 2, the inner container 1 comprises an inner container body 101 and an inner upper cover member 102, the inner upper cover member 102 comprises an inner top plate and two inner side upper plates which are oppositely arranged, an inner through hole 104 is a circular through hole formed by combining an arc-shaped shallow groove at the lower end of the inner side upper plate and an arc-shaped deep groove on the inner container body 101, an openable seawater injection hole cover 103 is arranged on the inner top plate of the inner upper cover member 102, during the test, the core wire 4 of the test cable 3 is clamped into the arc-shaped deep groove of the inner container body 101 from top to bottom, then the inner upper cover member 102 is used for covering, then the connecting part of the inner container body 101 and the inner upper cover member 102 and the perforated part of the core wire 4 are sealed by a sealing member, and finally seawater is injected. The test cable 3 can be conveniently put in and sealed.
In order to facilitate the placement and sealing of the test cable 3 in the outer container 2, as shown in fig. 3, the outer container 2 is a closed container comprising an outer container body 201 and an outer upper cover member 202, the outer upper cover member 202 comprises an outer top plate and two outer upper plates which are oppositely arranged, an outer through hole 203 is a circular through hole formed by combining an arc-shaped shallow groove at the lower end of the outer upper plate and an arc-shaped deep groove on the outer container body 201, during the test, a core wire 4 of the test cable 3 is clamped into the arc-shaped deep groove of the outer container body 201 from top to bottom, then the outer upper cover member 202 is used for covering, and then a sealing member is used for sealing the connecting part of the outer container body 201 and the outer upper cover member 202 and the through hole of the core wire 4. The test cable 3 can be conveniently put in and sealed.
During the test, the two ends of the test cable 3 are stripped off the outer insulating layers, only the core wires 4 are left, then the part of the test cable 3 which is left with the outer insulating layers is arranged on the cable support 5 of the inner container 1, the core wires 4 at the two ends penetrate through the inner through hole 104 and the outer through hole 203 from the two sides, after the sealing, the large current generating device 6 is connected, seawater is contained in the inner container 1, the test cable 3 is fully covered, the outer container 2 is filled with circulating water through the water inlet 7, the heating device is started, the water temperature is sensed through the temperature sensor, the environmental water temperature is adjusted, when the temperature needs to be reduced, the water circulation mode is adopted, the water temperature in the outer container 2 is reduced to the required temperature and is conducted to the inner container 1, through the current effect of the large current generating device 6, the test cable 3 can effectively realize the aging and degradation test of the simulated environment under the gradient effect of the heating temperature from the center of the core wires 4 to the outside, the simulation accuracy is high, and the device can effectively simulate the thermal degradation condition of the aging test under the action of the outward gradient temperature from the center of the core wire in the actual operation environment of the submarine cable, and make up the defect of uneven degradation of the main insulation of the power cable caused by the traditional accelerated thermal aging test.
In the example, the simulated temperature gradient range is-5-30 ℃ through the adjustment of the heating device and the circulating water.
The above sea cable aging test device under the action of temperature gradient shown in fig. 1-3 is a specific embodiment of the present invention, which already embodies the substantial features and improvements of the present invention, and can be modified equivalently in shape, structure and the like according to the practical use requirements and under the teaching of the present invention, and is within the protection scope of the present invention.
Claims (5)
1. The utility model provides a submarine cable aging test device under temperature gradient effect which characterized in that: the device comprises an inner container (1) for containing seawater, an outer container (2) for carrying out water circulation, a large current generating device (6) for connecting a test cable (3) to realize current simulation in a working state, a cable support (5) for supporting and placing the test cable (3), a temperature sensor for monitoring temperature and a heating device for regulating temperature, wherein the cable support (5) is arranged in the inner container (1) and used for supporting and placing the test cable (3), the inner container (1) is arranged in the outer container (2), the temperature sensor and the heating device are arranged in the outer container (2), inner through holes (104) and outer through holes (203) for penetrating core wires (4) of the test cable (3) are arranged on two transverse end faces of the inner container (1) and the outer container (2), the outer container (2) is provided with a water inlet (7) and a water outlet (8), the inner container (1) and the outer container (2) are hermetically isolated.
2. The submarine cable aging test device under the action of the temperature gradient according to claim 1, wherein: the height of the inner container (1) is 5-20cm lower than that of the outer container (2).
3. The submarine cable aging test device under the action of the temperature gradient according to claim 2, wherein: the inner container (1) is an openable closed container.
4. The submarine cable aging test device under the action of the temperature gradient according to claim 3, wherein: the inner container (1) comprises an inner container body (101) and an inner upper cover part (102), the inner upper cover part (102) comprises an inner top plate and two inner side upper plates which are oppositely arranged, an inner through hole (104) is a circular through hole formed by combining an arc-shaped shallow groove at the lower end of the inner side upper plate and an arc-shaped deep groove on the inner container body (101), an openable seawater injection hole cover (103) is arranged on the inner top plate of the inner upper cover part (102), during a test, a core wire (4) of a test cable (3) is clamped into the arc-shaped deep groove of the inner container body (101) from top to bottom, then the inner upper cover part (102) is used for covering, then a sealing part is used for sealing the connecting part of the inner container body (101) and the inner upper cover part (102) and the perforated part of the core wire (4), and finally seawater is injected.
5. The submarine cable aging test device under the action of the temperature gradient according to claim 4, wherein: outer container (2) for including the outer container body (201) and the closed container of outer upper cover (202), outer upper cover (202) including outer roof and two outside upper plates that set up relatively, outer through hole (203) arc shallow slot by outside upper plate lower extreme and the outer container body (201) on the arc deep groove combination form circular through hole, during the experiment, core wire (4) of experimental cable (3) are gone into the arc deep groove of the outer container body (201) from last down, then close with outer upper cover (202) lid, the connection position and core wire (4) perforation department of the sealed outer container body (201) of reuse sealing member and outer upper cover (202).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123032228.3U CN216525240U (en) | 2021-11-29 | 2021-11-29 | Submarine cable aging test device under temperature gradient effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123032228.3U CN216525240U (en) | 2021-11-29 | 2021-11-29 | Submarine cable aging test device under temperature gradient effect |
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| CN202123032228.3U Active CN216525240U (en) | 2021-11-29 | 2021-11-29 | Submarine cable aging test device under temperature gradient effect |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235925A (en) * | 2022-06-14 | 2022-10-25 | 西安交通大学 | Thermal-fatigue aging test device for testing dynamic submarine cable insulating material |
| CN116593343A (en) * | 2023-05-26 | 2023-08-15 | 广东电网有限责任公司 | Submarine cable inner sheath thermal fatigue test device |
-
2021
- 2021-11-29 CN CN202123032228.3U patent/CN216525240U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235925A (en) * | 2022-06-14 | 2022-10-25 | 西安交通大学 | Thermal-fatigue aging test device for testing dynamic submarine cable insulating material |
| CN116593343A (en) * | 2023-05-26 | 2023-08-15 | 广东电网有限责任公司 | Submarine cable inner sheath thermal fatigue test device |
| CN116593343B (en) * | 2023-05-26 | 2024-03-29 | 广东电网有限责任公司 | Submarine cable inner sheath thermal fatigue test device |
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