Line patrol method in cable path

Abstract

The invention provides a line patrol method in a cable path. The line patrol method comprises the following steps: grounding one end of a target cable; connecting the other end of the target cable to a current output device; outputting a preset current to the target cable through a current output device; measuring the current of each cable in the path through which the target cable passes, determining the measurement current of each cable, and screening out the cable of which the measurement current is the preset current as the current screened-out cable; and if the number of the currently screened cable is one, determining that the currently screened cable is a target cable. One end of the target cable is grounded, currents with different values are applied to the other end of the target cable, the target cable is determined by measuring the current value of the cable in the same path, the working efficiency is remarkably improved, the test convenience is improved, the test efficiency is improved, the cost is saved, the economic benefit is increased, and the accuracy and reliability of a test result are ensured. Meanwhile, the risk in the construction process is reduced, and the operation safety is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical construction, and in particular to a line inspection method in a cable path. Background Art

[0002] During electrical construction work at the construction site, it is often necessary to find a specific cable among many cables in the cable laying path due to cable faults, cable laying errors and other reasons. At present, there are two main methods for cable line inspection (i.e. finding the corresponding cable in the cable laying path) at the electrical construction site. The first is to use a cable fault line inspection instrument. The main function of the instrument is to apply continuous voltage to the cable when a short circuit fault occurs in the cable until the fault point is completely broken down, and to pulse discharge the cable after the breakdown. The fault point will emit a pulsed discharge sound, thereby finding the cable fault point. This method is limited to the use of faulty cables, and fault-free cables cannot be used. In addition, continuous discharge can easily cause electric shock, which poses a great safety hazard. In order to realize the line inspection of various cables, the second method is to arrange on-site construction workers to conduct a survey of the entire cable loop from beginning to end, so as to find a cable that needs to be determined among the many cables in the cable laying path. This method is inefficient, and when the laying environment is harsh, the survey operation cannot be carried out. Summary of the invention

[0003] In view of this, the present invention proposes a line inspection method in a cable path, aiming to solve the problem that the existing cable line inspection method at the electrical construction site is low in efficiency and the laying environment is harsh and cannot perform survey operations.

[0004] The present invention proposes a line patrol method in a cable path, which includes the following steps: step S1, grounding one end of a target cable; step S2, connecting the other end of the target cable to a current output device; step S3, outputting a preset current to the target cable through the current output device; step S4, measuring the current of each cable in the path passed by the target cable, determining the measured current of each cable, and screening out the cable whose measured current is the preset current as the currently screened cable; step S5, if there is only one currently screened cable, determining the currently screened cable as the target cable.

[0005] Furthermore, in the above-mentioned line inspection method in the cable path, if there are multiple cables currently screened out, steps S3 to S4 are repeated one by one, and the current output device outputs another different preset current to the target cable, and screens out the cables whose measured currents of the currently screened out cables correspond to the preset current, until only one cable is screened out, and then it is determined that the screened cable is the target cable.

[0006] Furthermore, in the above-mentioned line inspection method in the cable path, the current output device outputs a preset current to the target cable gradually increasing each time.

[0007] Furthermore, in the above-mentioned line patrol method in the cable path, the incremental amount of the preset current output by the current output device each time is 1A.

[0008] Furthermore, in the above-mentioned line inspection method in the cable path, the preset current outputted by the current output device to the target cable for the first time is 1A, and the preset current outputted by the current output device to the target cable for the second time is 2A.

[0009] Furthermore, in the above-mentioned cable patrol method, the current of each cable in the path passed by the target cable is measured one by one, specifically: the current of each cable in the path passed by the target cable is measured one by one by a clamp ammeter.

[0010] Furthermore, in the above-mentioned cable route inspection method, the clamp ammeter is a clamp ammeter equipped with a flexible current coil.

[0011] Furthermore, in the above-mentioned line inspection method in the cable path, the current output device is a relay protection tester.

[0012] Furthermore, in the above-mentioned line inspection method in the cable path, the current output end of the relay protection tester is connected to the other end of the target cable, and the other end is grounded.

[0013] Furthermore, the line inspection method in the above-mentioned cable path, after determining that the screened cable is the target cable, includes the following steps: Step S6, outputting another preset verification current different from the preset current to the target cable through the current output device, and determining whether the current on the target cable is the preset verification current, so as to verify the target cable.

[0014] The line inspection method in the cable path provided by the present invention grounds one end of the target cable and applies currents of different values ​​to the other end, and determines the target cable by measuring the current values ​​of the cables in the same path, which significantly improves work efficiency, increases the convenience of testing, improves test efficiency, saves costs, increases economic benefits, ensures the accuracy and reliability of test results, and at the same time reduces the risks in the construction process, enhances the safety of operation, ensures the safety of personnel and equipment in the test process, and solves the problems of low efficiency and poor laying environment in the existing cable line inspection method at the electrical construction site, and makes it impossible to carry out survey operations; at the same time, through the detection of secondary current increase, not only faulty cables but also non-faulty cables can be screened out, and faulty cables can be accurately distinguished from non-faulty cables, effectively eliminating the possibility of line inspection failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A flowchart of a cable path inspection method provided by an embodiment of the present invention; Figure 2 A schematic diagram of a structure in which one end of a target cable is grounded according to an embodiment of the present invention; Figure 3 A schematic diagram of a structure in which one end of a target cable provided by an embodiment of the present invention is grounded and the other end is connected to a relay protection tester to input current into the target cable; Figure 4 A schematic diagram of a structure for measuring current to find a target cable provided by an embodiment of the present invention; Figure 5 Another flowchart of a cable path inspection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] See also Figure 1 , which is a flowchart of a line patrol method in a cable path provided by an embodiment of the present invention. As shown in the figure, the line patrol method in a cable path includes the following steps: Step S1, reliably ground one end of the target cable.

[0018] Specifically, first determine the two ends of the target cable 1; then, Figure 2 As shown, connect one end of the target cable 1 (such as Figure 2 left end as shown) is grounded.

[0019] Step S2, connecting the other end of the target cable to the current output device.

[0020] Specifically, Figure 3 As shown, connect the other end of target cable 1 (as Figure 3The right end as shown in FIG. 1 is connected to the current output device 2, that is, the current output device 2 is connected to the other end of the target cable 1 (as shown in FIG. Figure 3 The target cable 1 is connected to the right end of the target cable 1 by a current output device, that is, after one end of the target cable 1 is grounded and short-circuited, the other end of the target cable 1 is connected by a current output device 2, and current is applied to the inside of the target cable 1. In this embodiment, the current output device 2 can be a relay protection tester, and of course, it can also be other current output devices, which are not limited in this embodiment. In this embodiment, as Figure 3 As shown, the current output terminal of the relay protection tester is connected to the other end of the target cable 1, and the other end is grounded.

[0021] Step S3, outputting a preset current to the target cable through the current output device.

[0022] Specifically, a relay protection tester is used to apply a preset current to the other end of the target cable.

[0023] Step S4, measuring the current of each cable in the path passed by the target cable, determining the measured current of each cable, and screening out cables whose measured current is a preset current as the currently screened cables.

[0024] Specifically, the clamp ammeter 3 can be used to measure each cable in the path through which the target cable 1 passes, obtain the measured current of each cable in the path through which the target cable 1 passes, and determine the cable whose measured current is the preset current applied by the target cable 1 as the current screened cable. In this embodiment, in order to expand the applicability of cable screening, preferably, the clamp ammeter 3 is a clamp ammeter equipped with a flexible current coil.

[0025] Step S5: If there is only one cable currently screened out, determine that the currently screened out cable is the target cable.

[0026] Specifically, if there is only one cable currently screened out, the currently screened out cable is determined to be the target cable; if there are multiple cables currently screened out, steps S3 to S4 are repeated one by one, and the current output device 2 outputs another different preset current to the target cable, and screens out the cable whose measured current of the currently screened out cable corresponds to the preset current, until only one cable is screened out, and the screened out cable is determined to be the target cable. In order to improve the screening efficiency, preferably, the preset current output by the current output device 2 to the target cable increases gradually each time; further preferably, the incremental amount of the preset current output by the current output device 2 each time is 1A, and of course, it can also be other fixed values, which are not limited in this embodiment. In this embodiment, the preset current output by the current output device 2 to the target cable for the first time is 1A, and the preset current output by the current output device 2 to the target cable for the second time is 2A.

[0027] See also Figure 5 , which is another flowchart of the cable path patrol method provided by an embodiment of the present invention. As shown in the figure, the cable path patrol method may also include the following steps: Step S1, reliably ground one end of the target cable.

[0028] Step S2, connecting the other end of the target cable to the current output device.

[0029] Step S3, outputting a preset current to the target cable through the current output device.

[0030] Step S4, measuring the current of each cable in the path passed by the target cable, determining the measured current of each cable, and screening out cables whose measured current is a preset current as the currently screened cables.

[0031] Step S5: If there is only one cable currently screened out, determine that the currently screened out cable is the target cable.

[0032] Step S6, outputting a preset verification current different from the previous preset current to the target cable through the current output device, and determining whether the current on the target cable is the preset verification current, so as to verify the target cable.

[0033] Specifically, a preset verification current different from the previous preset current is output to the target cable 1 through the current output device 2, and it is determined whether the current on the target cable 1 is the preset verification current to verify the target cable 1. If the current on the target cable 1 is the preset verification current, it is verified that the screened cable is indeed the target cable; otherwise, that is, the current on the target cable 1 is not the preset verification current, steps S3 to S6 are repeated, and the preset current applied in the repetition is different from the preset current applied in the previous period, until the verification is passed.

[0034] In this embodiment, the target cable can be a faulty cable or a non-faulty cable. In this way, the faulty cable and the non-faulty cable can be accurately distinguished, effectively eliminating the possibility of line inspection faults.

[0035] In summary, the line inspection method in the cable path provided in this embodiment grounds one end of the target cable and applies current of different values ​​to the other end, and determines the target cable by measuring the current value of the cable in the same path, which significantly improves work efficiency, increases the convenience of testing, improves test efficiency, saves costs, increases economic benefits, ensures the accuracy and reliability of test results, and at the same time reduces the risks in the construction process, enhances the safety of operations, and ensures the safety of personnel and equipment during the test, and solves the problems of low efficiency of existing cable line inspection methods at electrical construction sites and the inability to conduct survey operations in harsh laying environments; at the same time, through the detection of secondary current boost, not only faulty cables can be screened out, but also non-faulty cables can be screened out, and faulty cables can be accurately distinguished from non-faulty cables, effectively eliminating the possibility of line inspection failures.

[0036] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A line inspection method in a cable path, characterized in that: The steps include: Step S1, grounding one end of the target cable; Step S2, connecting the other end of the target cable to the current output device; Step S3, outputting a preset current to the target cable through the current output device; Step S4, measuring the current of each cable in the path passed by the target cable, determining the measured current of each cable, and screening out the cable whose measured current is a preset current as the current screened cable; Step S5: If there is only one cable currently screened out, determine that the currently screened out cable is the target cable.

2. The cable line inspection method according to claim 1, characterized in that: If there are multiple cables currently screened out, steps S3 to S4 are repeated one by one, and the current output device outputs another different preset current to the target cable, and screens out the cables whose measured currents of the currently screened out cables correspond to the preset current, until only one cable is screened out, and then it is determined that the screened cable is the target cable.

3. The cable line inspection method according to claim 2, characterized in that: The current output device outputs a preset current to the target cable in a gradually increasing manner each time.

4. The cable line inspection method according to claim 3, characterized in that: The current output device outputs a preset current in increments of 1A each time.

5. The cable line inspection method according to claim 3, characterized in that: The preset current that the current output device outputs to the target cable for the first time is 1A, and the preset current that the current output device outputs to the target cable for the second time is 2A.

6. The cable line inspection method according to any one of claims 1 to 5, characterized in that: The current measurement of each cable one by one in the path passed by the target cable is specifically as follows: The current of each cable is measured one by one through a clamp ammeter in the path passed by the target cable.

7. The cable line inspection method according to claim 6, characterized in that: The clamp ammeter is a clamp ammeter equipped with a flexible current coil.

8. The cable line inspection method according to any one of claims 1 to 5, characterized in that: The current output device is a relay protection tester.

9. The cable line inspection method according to claim 8, characterized in that: The current output end of the relay protection tester is connected to the other end of the target cable, and the other end is grounded.

10. The cable line inspection method according to any one of claims 1 to 5, characterized in that: After determining that the screened cables are target cables, the following steps are included: Step S6, outputting another preset verification current different from the preset current to the target cable through the current output device, and determining whether the current on the target cable is the preset verification current, so as to verify the target cable.

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