Cable fault simulation and positioning analysis system

Abstract

The invention relates to a cable fault simulation and positioning analysis system. The system comprises a conductive copper core; the conductive copper core penetrates through the environment simulation box, the environment simulation box is provided with a first clamping piece in the length direction of the conductive copper core, and the environment simulation box is provided with a second clamping piece in the tangential direction of the top end of the conductive copper core; the insulating strip, the armoring strip and the outer protection strip are sequentially arranged along the periphery of the conductive copper core, the insulating strip, the armoring strip and the outer protection strip respectively wind around the conductive copper core and are provided with a plurality of simulation areas, so that the insulating strip, the armoring strip and the outer protection strip wrap the conductive copper core, and the first clamping piece is used for blocking the two ends of the insulating strip, the armoring strip and the outer protection strip; the plurality of winding and unwinding mechanisms enable the corresponding simulation areas to move to the periphery of the conductive copper core; and the analysis mechanism is used for transmitting and receiving a pulse signal to one end of the conductive copper core.

Description

Technical Field

[0001] The invention relates to the field of cable fault simulation and positioning, and in particular to a cable fault simulation and positioning analysis system. Background Art

[0002] The basic structure of the cable is mainly composed of a conductive copper core, an insulating layer, an armor layer, and an outer sheath. The conductive copper core is used to transmit electrical energy; the insulating layer insulates the conductive copper core from the outside world to maintain insulation performance; the armor layer is used to provide additional mechanical protection to prevent the cable from being pierced; the outer sheath acts as a protective seal to prevent moisture from entering the insulation layer or external damage. Most cables are buried underground and are easily damaged by external stress, underground soil erosion, etc., including physical damage, material aging, improper installation and other problems.

[0003] When a cable fails, the fault position of the cable can be located by a low-voltage pulse method or a pulse current method. There are many reasons for cable failures. When locating the cable fault position, the tester needs to adjust the test parameters of the low-voltage pulse method or the pulse current method according to the cable and its external environment, so it is necessary to train the tester. In the prior art, the method or device for simulating cable faults generally adopts the method of adding normal, broken open circuit, short circuit, low resistance / high resistance modules between the output end and the output end of the cable, so as to simulate the normal, disconnected, short circuit, high resistance, low resistance and other conditions of the cable. For example, the publication number is CN104614604A, and the name is a 10kV cable fault simulation device and fault simulation method. The prior art only simulates the condition of the conductor core of the cable, and does not simulate the damage and aging of the insulation layer, armor layer, outer sheath, etc.

[0004] The purpose of the present invention is to design a cable fault simulation and location analysis system in view of the above-mentioned problems in the prior art. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a cable fault simulation and location analysis system, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is: A cable fault simulation and location analysis system, comprising: Conductive copper core; An environmental simulation box, the conductive copper core passes through the environmental simulation box, the environmental simulation box is provided with a first clamping piece along the length direction of the conductive copper core, and the environmental simulation box is provided with a second clamping piece along the tangent direction of the top end of the conductive copper core; An insulating strip, an armor strip, and an outer protective strip are sequentially arranged along the periphery of the conductive copper core, the insulating strip, the armor strip, and the outer protective strip are respectively wound around the conductive copper core, and the insulating strip, the armor strip, and the outer protective strip are each provided with a plurality of simulation areas along their length direction, the second clamping piece is used to clamp the insulating strip, the armor strip, and the outer protective strip at the top end of the conductive copper core, so that the insulating strip, the armor strip, and the outer protective strip wrap the conductive copper core, and the first clamping piece is used to block the two ends of the insulating strip, the armor strip, and the outer protective strip; Several reeling and unreeling mechanisms, through which the insulating strip, the armor strip, and the outer protective strip are respectively transported so that the corresponding simulation area moves to the surrounding of the conductive copper core; The analyzing mechanism is used for transmitting and receiving a pulse signal to one end of the conductive copper core.

[0007] Furthermore, the simulation area includes some or all of a mechanical damage area, a thermal damage area, an aging area, an environmental damage area, and a manufacturing defect area.

[0008] Furthermore, the environmental simulation box is provided with a plurality of open grooves on its top surface arranged along the length direction of the conductive copper core, and the insulating strip, the armor strip, and the outer protective strip respectively enter the environmental simulation box from one of the open grooves, then go around the conductive copper core and then exit the environmental simulation box from one of the open grooves.

[0009] Furthermore, the environment simulation box is provided with a through hole.

[0010] Furthermore, the environmental simulation box is provided with a pair of first installation grooves, the first clamping member includes a first driving member and a first piston, the first piston cooperates with the first installation groove, the first driving member drives the first piston to move, the conductive copper core passes through the first piston, and the first piston is over-fitted with the conductive copper core.

[0011] Furthermore, the environment simulation box is provided with a pair of second installation grooves, the second clamping member includes a second driving member and a second piston, and the second piston is provided with a plurality of through holes.

[0012] Furthermore, it comprises a plurality of guide rails, and the environment simulation box is connected to the guide rails.

[0013] Furthermore, a heating mechanism is provided in the environmental simulation box.

[0014] Therefore, the present invention provides the following effects and / or advantages: The present application improves the insulating layer, armor layer, and outer sheath of the power cable into a long strip shape, and conveys them through a reeling and unreeling mechanism so that they pass under the conductive copper core. The insulating layer, armor layer, and outer sheath are respectively provided with different simulation areas, and the simulation areas can simulate various fault conditions of the insulating layer, armor layer, and outer sheath. Through the action of the first clamp and the second clamp, the insulating layer, armor layer, and outer sheath wrap the conductive copper core and a part of the power cable, and then the corresponding material is added to the environmental simulation box to simulate the environment in which the power cable is located, so that a variety of different power cable fault conditions can be constructed for training operators.

[0015] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0016] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of a cross section of an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the environmental simulation box.

[0020] Figure 4 It is a schematic structural diagram of the second clamping member.

[0021] Figure 5 Schematic diagram of the outer protective strip passing through the conductive copper core.

[0022] Description of reference numerals: Conductive copper core 1, environmental simulation box 2, opening slot 201, through hole 202, first mounting slot 203, second mounting slot 204, first clamping member 3, first driving member 301, first piston 302, second clamping member 4, driving member 401, second piston 402, through hole 4021, insulating strip 5, simulation area 501, armor strip 6, outer protective strip 7, retracting and unwinding mechanism 8, guide rail 9. DETAILED DESCRIPTION

[0023] In order to facilitate understanding by those skilled in the art, the present invention is now described in further detail by way of examples: refer to Figure 1-5 , a cable fault simulation and location analysis system, comprising: Conductive copper core 1; An environmental simulation box 2, the conductive copper core 1 passes through the environmental simulation box 2, the environmental simulation box 2 is provided with a first clamping member 3 along the length direction of the conductive copper core 1, and the environmental simulation box 2 is provided with a second clamping member 4 along the tangent direction of the top end of the conductive copper core 1; In this embodiment, the environment simulation box 2 is arranged on the periphery of a section of the conductive copper core 1. The environment simulation box 2 is used to contain sand, soil, liquid, etc., so that the different environments in which the cable is located are conducive to the subsequent analysis mechanism to generate different reflected pulse signals in the conductive copper core 1 after emitting a pulse signal to the conductive copper core 1, which is conducive to studying the pulse signal performance of the conductive copper core 1 under different environments.

[0024] An insulating strip 5, an armor strip 6, and an outer protective strip 7 are sequentially arranged along the periphery of the conductive copper core 1, the insulating strip 5, the armor strip 6, and the outer protective strip 7 are respectively wound around the conductive copper core 1, and the insulating strip 5, the armor strip 6, and the outer protective strip 7 are each provided with a plurality of simulation areas 501 along their length direction, the second clamping member 4 is used to clamp the insulating strip 5, the armor strip 6, and the outer protective strip 7 at the top end of the conductive copper core 1, so that the insulating strip 5, the armor strip 6, and the outer protective strip 7 wrap the conductive copper core 1, and the first clamping member 3 is used to block the two ends of the insulating strip 5, the armor strip 6, and the outer protective strip 7; The structure and arrangement of the insulating strip 5, armor strip 6, and outer protective strip 7 are one of the core improvements of this application. This application arranges the insulating layer, armor layer, and outer protective layer of the power cable from the inside to the outside into long strips, forming the insulating strip 5, armor strip 6, and outer protective strip 7. The insulating strip 5 is used to insulate the conductive copper core 1 from the outside to maintain insulation performance; the armor strip 6 is used to provide additional mechanical protection to prevent the cable from being pierced; the outer protective strip 7 is used to protect and seal to prevent moisture from penetrating the insulating layer or being damaged by the outside. In addition, the insulating layer can be made of rubber material, the armor layer can be a metal wire mesh, and the outer protective layer is made of PVC material. The insulating layer, the armor layer, and the outer protective layer are flexible and can be bent, so they can be made into a long strip shape for winding around the bottom of the conductive copper core 1. When the second clamping member 4 clamps and squeezes the top of the conductive copper core 1 from both sides, the insulating strip 5, the armor strip 6, and the outer protective strip 7 are brought together to wrap the conductive copper core 1, and a sealing structure is formed at the clamping position. Finally, the conductive copper core 1, the insulating strip 5, the armor strip 6, and the outer protective strip 7 form the structure and layers of the power cable itself.

[0025] Furthermore, the first clamping member 3 can seal both ends of the insulating strip 5, the armor strip 6, and the outer protective strip 7, so that the conductive copper core 1, the insulating strip 5, the armor strip 6, and the outer protective strip 7 form a sealing structure, so that the substance contained in the environmental simulation box 2 penetrates into the insulating strip 5, the armor strip 6, and the outer protective strip 7 along the side of the power cable, instead of directly contacting the exposed conductive copper core 1.

[0026] A plurality of reeling and unreeling mechanisms 8, through which the insulating strip 5, the armor strip 6, and the outer protective strip 7 are respectively transported so that the corresponding simulation area 501 moves to the surrounding of the conductive copper core 1; In this embodiment, the simulation area 501 on the insulating strip 5, the armor strip 6, and the outer protective strip 7 can be a sequentially and cyclically arranged area, and one end of the insulating strip 5, the armor strip 6, and the outer protective strip 7 is unwound from the corresponding reeling and unwinding mechanism 8, and the other end is reeled from the corresponding reeling and unwinding mechanism 8, so that the corresponding positions of the insulating strip 5, the armor strip 6, and the outer protective strip 7 can be controlled by the reeling and unwinding mechanism 8 to wrap the conductive copper core 1. The reeling and unwinding mechanism 8 can be set on the environmental simulation box 2.

[0027] In this embodiment, after the corresponding simulation area 501 is wrapped around the conductive copper core 1, a simulated power cable is formed. For example, after the qualified and normal areas on the insulating strip 5, the armor strip 6, and the outer protective strip 7 are wrapped around the conductive copper core 1, a normal and qualified power cable is formed; for another example, after the heat-damaged area on the insulating strip 5, the qualified and normal areas on the armor strip 6, and the outer protective strip 7 are wrapped around the conductive copper core 1, a power cable with abnormal internal heating damage is formed. Specifically, the unwinding mechanism can be driven to move the corresponding simulation area 501 around the conductive copper core 1 according to the fault condition of the power cable, the environment, etc.

[0028] The analyzing mechanism (not shown) is used to transmit and receive pulse signals to one end of the conductive copper core 1.

[0029] The analysis mechanism of this embodiment is a direct adoption of the existing technology. For example, when the power cable is damaged, there is a wave impedance mismatch in the damaged area of ​​the power cable. By using the principle that the pulse signal encounters a wave impedance mismatch point when propagating in the cable line to generate electromagnetic wave reflection, a pulse signal is emitted to the cable and the pulse signal returned by the cable is received. The pulse wave reflection time and the cable wave speed can be measured on the oscilloscope, and the distance to the cable fault point can be calculated. Through the cooperation of the above-mentioned insulating strip 5, armor strip 6, outer protective strip 7 and environmental simulation box 2, cable faults in different situations and locations can be simulated, so as to be used for operator simulation training.

[0030] Furthermore, the simulation area 501 includes some or all of a normal area, a mechanical damage area, a thermal damage area, an aging area, an environmental damage area, and a manufacturing defect area.

[0031] The mechanical damage area may be a section of the corresponding insulating strip 5 or the armor strip 6 or the outer protective strip 7, which is damaged by external forces such as digging, impact or compression, or stretched or bent beyond the allowable limit, or caused by holes caused by animal gnawing, etc. The thermal damage area may be a section of the corresponding insulating strip 5 or the armor strip 6 or the outer protective strip 7, which is thermally damaged under local high temperature for a long time. The aging area may be a section of the corresponding insulating strip 5 or the armor strip 6 or the outer protective strip 7, which is exposed to ultraviolet rays for a long time, resulting in aging of the cable material. The environmental damage area may be a section of the corresponding insulating strip 5 or the armor strip 6 or the outer protective strip 7, which is exposed to acidic or alkaline liquids for a long time, or exposed to high humidity environment, or damage caused by extreme high temperature or low temperature in the outside world. The manufacturing defect area may be a section of the corresponding insulating strip 5 or the armor strip 6 or the outer protective strip 7, which includes uneven thickness, uneven materials, unqualified materials, etc.

[0032] The simulation areas 501 may be in a square shape and arranged at equal intervals along the length direction thereof.

[0033] Furthermore, the environmental simulation box 2 is provided with a plurality of open grooves 201 arranged along the length direction of the conductive copper core 1 on its top surface, and the insulating strip 5, the armor strip 6, and the outer protective strip 7 respectively enter the environmental simulation box 2 from one of the open grooves 201, then go around the conductive copper core 1 and then exit the environmental simulation box 2 from one of the open grooves 201.

[0034] In this embodiment, the number of the open slots 201 is 6, for the insulating strip 5, the armor strip 6, and the outer protective strip 7 to enter and exit respectively, thereby effectively preventing the insulating strip 5, the armor strip 6, and the outer protective strip 7 from being entangled together.

[0035] Furthermore, the environment simulation box 2 is provided with a through hole 202 .

[0036] In this embodiment, the through hole is used to provide an opening for sand, soil, liquid, etc. to enter the interior of the environment simulation box 2. At the same time, the through hole can be provided with a guide tube, etc. to facilitate the sand, soil, liquid, etc. to pass through the through hole 202.

[0037] Furthermore, the environmental simulation box 2 is provided with a pair of first mounting grooves 203, the first clamping member 3 includes a first driving member 301 and a first piston 302, the first piston 302 cooperates with the first mounting groove 203, the first driving member 301 drives the first piston 302 to move, the conductive copper core 1 passes through the first piston 302, and the first piston 302 is over-fitted with the conductive copper core 1.

[0038] In this embodiment, the cooperation between the first piston 302 and the first mounting groove 203 can prevent the substance inside the environment simulation box 2 from leaking out from the first mounting groove 203, and at the same time realize the structure of sealing the two ends of the insulating strip 5, the armor strip 6, and the outer protective strip 7 after the first piston 302 is extended.

[0039] Furthermore, the environment simulation box 2 is provided with a pair of second installation grooves 204 , the second clamping member 4 includes a second driving member 401 and a second piston 402 , and the second piston 402 is provided with a plurality of through holes 4021 .

[0040] In this embodiment, the cooperation between the second piston 402 and the second installation groove 204 can prevent the substance inside the environment simulation box 2 from leaking out from the second installation groove 204. At the same time, the upper and lower ends of the second piston 402 can be connected by providing the through hole 4021, and when sand, soil, liquid, etc. are added to the environment simulation box 2, they can flow downward from the area of ​​the through hole 4021 without being blocked by the second piston 402.

[0041] Furthermore, it comprises a plurality of guide rails 9 , and the environment simulation box 2 is connected to the guide rails 9 .

[0042] Through this structure, the environmental simulation box 2 and the insulating strip 5, the armor strip 6, the outer protective strip 7 and the reeling and unreeling mechanism 8 can be moved together along the length direction of the conductive copper core 1, thereby simulating the situation where a cable fault occurs at different positions.

[0043] Furthermore, a heating mechanism (not shown) is provided in the environment simulation box 2 .

[0044] In this embodiment, the heating mechanism may be a resistance wire, which can simulate the situation where the underground is heated by sunlight, or the situation where the conductive copper core 1 is abnormally heated.

[0045] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware.

[0046] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A cable fault simulation and location analysis system, characterized in that: include: Conductive copper core (1); An environmental simulation box (2), the conductive copper core (1) passing through the environmental simulation box (2), the environmental simulation box (2) being provided with a first clamping member (3) along the length direction of the conductive copper core (1), and the environmental simulation box (2) being provided with a second clamping member (4) along the tangent direction of the top end of the conductive copper core (1); An insulating strip (5), an armor strip (6), and an outer protective strip (7) are sequentially arranged along the periphery of the conductive copper core (1); the insulating strip (5), the armor strip (6), and the outer protective strip (7) are respectively wound around the conductive copper core (1); the insulating strip (5), the armor strip (6), and the outer protective strip (7) are each provided with a plurality of simulation areas (501) along their length direction; the second clamping member (4) is used for clamping the insulating strip (5), the armor strip (6), and the outer protective strip (7) at the top end of the conductive copper core (1), so that the insulating strip (5), the armor strip (6), and the outer protective strip (7) wrap the conductive copper core (1); and the first clamping member (3) is used for sealing the two ends of the insulating strip (5), the armor strip (6), and the outer protective strip (7); A plurality of reeling and unreeling mechanisms (8), wherein the insulating strip (5), the armor strip (6), and the outer protective strip (7) are respectively transported through the reeling and unreeling mechanisms (8) so that the corresponding simulation area (501) moves to the periphery of the conductive copper core (1); An analysis mechanism is used for transmitting and receiving a pulse signal to one end of the conductive copper core (1).

2. A cable fault simulation and location analysis system according to claim 1, characterized in that: The simulation area (501) includes some or all of a mechanical damage area, a thermal damage area, an aging area, an environmental damage area, and a manufacturing defect area.

3. A cable fault simulation and location analysis system according to claim 1, characterized in that: The environment simulation box (2) is provided with a plurality of open slots (201) on its top surface arranged along the length direction of the conductive copper core (1); the insulating strip (5), the armor strip (6), and the outer protective strip (7) respectively enter the environment simulation box (2) from one of the open slots (201), then go around the conductive copper core (1) and then exit the environment simulation box (2) from one of the open slots (201).

4. A cable fault simulation and location analysis system according to claim 3, characterized in that: The environment simulation box (2) is provided with a through hole (202).

5. A cable fault simulation and location analysis system according to claim 1, characterized in that: The environment simulation box (2) is provided with a pair of first installation grooves (203), the first clamping member (3) comprises a first driving member (301) and a first piston (302), the first piston (302) cooperates with the first installation groove (203), the first driving member (301) drives the first piston (302) to move, the conductive copper core (1) passes through the first piston (302), and the first piston (302) and the conductive copper core (1) are over-fitted.

6. A cable fault simulation and location analysis system according to claim 1, characterized in that: The environment simulation box (2) is provided with a pair of second installation grooves (204); the second clamping member (4) comprises a second driving member (401) and a second piston (402); the second piston (402) is provided with a plurality of through holes (4021).

7. A cable fault simulation and location analysis system according to claim 1, characterized in that: It comprises a plurality of guide rails (9), and the environment simulation box (2) is connected to the guide rails.

8. A cable fault simulation and location analysis system according to claim 1, characterized in that: A heating mechanism is provided in the environment simulation box (2).

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