CN217332802U

CN217332802U - Cable calibration instrument

Info

Publication number: CN217332802U
Application number: CN202220820912.3U
Authority: CN
Inventors: 邢钢; 郭晓东; 董鹏程; 邢文珑; 姜华; 陈鹏宇; 李慧勇; 徐鑫; 姚媛; 刘斌; 吕恩泽; 黄智超; 陈鑫
Original assignee: Wulanchabu Power Supply Branch Of Inner Mongolia Electric Power Group Co ltd
Current assignee: Wulanchabu Power Supply Branch Of Inner Mongolia Electric Power Group Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-30
Anticipated expiration: 2032-04-11

Abstract

The utility model relates to a secondary circuit checking technical field, in particular to a cable checking instrument; the short circuit protection device comprises a host unit for short-circuiting a secondary cable at one end with a ground wire and a slave unit for short-circuiting the secondary cable at one end with the ground wire; the host unit comprises a control module; the control module is electrically connected with the power supply module, and the output end of the control module is connected with a plurality of host check lines; the other end of the host check line is used for being connected with a core wire of the secondary cable; the ground port of the control module is connected with a common line of the host; the slave unit comprises a plurality of slave check lines, and indicator lamps are respectively arranged on the slave check lines; the device can be used for calibrating each core wire of the multi-core cable through one-side wiring.

Description

Cable calibration instrument

Technical Field

The utility model relates to a secondary circuit school is examined technical field, concretely relates to cable school line appearance.

Background

The secondary loop is a link connecting the primary equipment and the secondary equipment, and the secondary equipment is connected with each other to monitor, control, adjust and protect parameters and working conditions of elements in the primary equipment; the transformer is a circuit formed by connecting a secondary winding of a transformer, a measurement monitoring instrument, a relay, an automatic device and the like in an electrical system through a control cable; the correctness of the secondary loop is the key for ensuring the safe and stable operation of the primary system of the transformer substation.

The work of the secondary system is mainly divided into protection device debugging, secondary loop inspection and relay protection countermeasure investigation; the secondary circuit inspection is the most important component of the secondary system and is also the key point and difficulty of work; in the secondary loop inspection work, the core wires of the multi-core cable need to be checked to judge whether the core wires are the same core wire in one cable; as shown in fig. 1, two technicians are generally required to perform cable calibration, and an interphone and a multimeter are used to operate at two ends of a cable; carrying an interphone to reach two ends of a laid secondary cable, respectively stripping skins at two ends of the secondary cable to expose cable cores, then carrying out short circuit on a No. 1 core wire at one end of the cable and a grounding point, simultaneously using a universal meter to make and break each core wire at the opposite end of the cable core by core and the grounding point, when a 'dripping' buzzer is heard, indicating that the No. 1 core wire is found, and marking the No. 1 core wire sheathed wire number pipe after correction; the core wires at one end of the cable are sequentially in short circuit with the ground wire by the same method, and the other end of the cable is sequentially switched on and off to finish other core wire calibration work; in the process, a universal meter is needed, each point is manually lapped to judge the on-off of the core wire and the cables corresponding to two sides, and an operator is needed to carry out multiple communication and multiple short-circuit and disconnection measurement operations; based on the technical background, the inventor designs a cable checking instrument.

Disclosure of Invention

In order to solve the secondary circuit that prior art exists and detect need carry out technical problem such as multiple measurement short circuit, disconnection operation, the utility model provides a cable school line appearance, it is through one side wiring, can proofread each heart yearn of multicore cable promptly.

The utility model discloses a technical scheme as follows: a cable calibration instrument comprises a host unit for short-circuiting a secondary cable at one end with a ground wire, and a slave unit for short-circuiting the secondary cable at one end with the ground wire; the host unit comprises a control module; the control module is electrically connected with the power supply module, and the output end of the control module is connected with a plurality of host check lines; the other end of the host check line is used for being connected with a core wire of the secondary cable; the ground port of the control module is connected with a host common line, and the other end of the host common line is used for being connected with a ground wire; the slave unit comprises a plurality of slave check lines, and indicator lamps are respectively arranged on the slave check lines; one end of the slave check line is connected with a core wire of the secondary cable, and the other end of the slave check line is connected with a ground wire; the control module is used for sequentially outputting high-level signals to the output end.

Further, the number of the master check lines is the same as that of the slave check lines.

Optionally, the slave verification lines are connected in parallel and then connected in series with a slave common line; the other end of the slave common line is used for connection to ground.

Preferably, the connection terminal is arranged at the connection end of the host computer check line, the slave computer check line and the secondary cable.

Specifically, the connection terminal is of either a clip type or a probe type.

And further. And a common line terminal is arranged at the connecting end of the host common line, the slave common line and the ground line.

Specifically, the common terminal is any one of an external lead type or a banana jack type.

Furthermore, the host unit is arranged in the host protection box, and the slave unit is arranged in the slave protection box.

Preferably, the connection terminal of the host unit is arranged on the upper surface of the host protection box, and the public terminal of the host unit is arranged on the side wall of the host protection box; the connecting terminal and the indicator lamp of the extension unit are respectively arranged on the upper surface of the extension protection box, and the public terminal of the extension unit is arranged on the side wall of the extension protection box.

The utility model discloses the beneficial effect who reaches does: connecting the access of the host check line and the slave check line with the core line of the secondary cable, and connecting the other end of the slave check line with the ground line at one time; the host common line is connected with the ground line; marking a core wire of a secondary cable connected to a common line of a host; the master unit, the slave unit and the ground wire form a closed loop; the control module sequentially outputs high-level signals to the output end, and the high-level signals are transmitted to the indicating lamp through the host check line and the secondary cable; sequentially lighting the indicator lamps of the slave computer check line; sequentially marking core wires of the secondary cables connected with the slave computer check wires through the lighting sequence of the indicator lamps; the secondary cable can be calibrated after the primary wiring, thereby avoiding measuring short circuit and disconnection for many times in the process of calibrating the cable

The utility model discloses still possess following characteristics: the host unit is arranged in the host protection box, and the slave unit is arranged in the slave protection box; the host machine protection box and the slave machine protection box respectively provide protection for the host machine unit and the slave machine unit so as to avoid damage.

Drawings

FIG. 1 is a schematic diagram of a conventional detection method.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic diagram of the structure of the host unit of the present invention.

Fig. 4 is a schematic diagram of the slave unit structure according to the present invention.

Fig. 5 is a schematic structural diagram of the host protection box of the present invention.

Fig. 6 is a schematic structural view of the slave computer protection box of the present invention.

Fig. 7 is a circuit block diagram of the present invention.

In the figure, 1, a host unit; 2. a slave unit; 3. a control module; 4. a power supply module; 5. a host common line; 6. checking the line by the host; 7. checking a line from a slave machine; 8. an indicator light; 9. a slave common line; 10. a key module; 11. a connection terminal; 12. a common terminal; 13. a host protection box; 14. and a slave machine protection box.

Detailed Description

To facilitate understanding of the present invention for those skilled in the art, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Example one

When the secondary side of the existing transformer substation is calibrated, two technicians are generally needed to operate at two ends of a cable by using an interphone and a universal meter; carrying an interphone to reach two ends of a laid secondary cable, respectively stripping outer skins at the two ends of the secondary cable to expose cable cores, then short-connecting a certain core wire at one end of the cable with a grounding point, and simultaneously switching on and off core wires at the opposite end of the cable at the other side with the grounding point one by a universal meter; the operation personnel is required to carry out multiple communication and multiple short circuit and disconnection measurement operations; as shown in fig. 2, the utility model provides a cable calibration instrument, including the host computer unit 1 that is used for with one end secondary cable and ground wire short circuit to and from the unit 2 of machine of one end secondary cable and ground wire short circuit, the both ends of secondary cable pass through host computer unit 1, from the unit 2 of machine and constitute closed loop with the ground wire; specifically, the host unit 1 includes a control module 3, and the control module 3 is any one of a single chip microcomputer or a PLC; the control module 3 is electrically connected with the power module 4, and the power module 4 is an external battery and is used for supplying power to the control module 3; one end of each of the 10 host check lines 6 is sequentially connected with the output end of the control module 3; the other end of the host check line 6 is used for being connected with a core wire of the secondary cable; the host common line 5 is connected with the ground port of the control module 3, and the other end of the host common line 5 is used for being connected with a ground line; further, the slave unit 2 includes 10 slave check lines 7, one end of the slave check line 7 is used for connecting with the core line of the secondary cable, and the other end of one end of the slave check line 7 is used for connecting with the ground line; meanwhile, indicator lights 8 are respectively arranged on the slave machine check lines 7; the indicator light 8 is an LED lamp bead; the power is low, and the energy consumption is lower than 0.5W, so that the endurance of the device is prevented from being influenced; when the cable is used, the host check line 6 and the slave check line 7 are connected with the core line of the secondary cable, and the other end of the slave check line 7 is connected with the ground wire for one time; the host common line 5 is connected to the ground; marking the core wire of the secondary cable connected to the host common line 5; the master unit 1, the slave unit 2 and the ground wire form a closed loop; the control module 3 sequentially outputs high-level signals to an output end, and the high-level signals are transmitted to an indicator lamp 8 through a host check line 6 and a secondary cable; sequentially lightening the indicator lamps 8 of the slave check line 7; sequentially marking core wires of the secondary cables connected with the slave checking wire 7 through the lighting sequence of the indicator lights 8; the secondary cable can be calibrated after the primary wiring, so that short circuit and disconnection are prevented from being measured for many times in the process of calibrating the cable.

Furthermore, the slave check line 7 needs to be connected with the ground wire for multiple times when being grounded, and the operation is complex; therefore, 10 slave check lines 7 are connected in parallel and then connected in series with a slave common line 9; the other end of the slave common line 9 is used for connecting with the ground line; the slave end is only needed to be grounded once.

Control module 3 is connected with button module 10 electricity, and button module 10 presses back and then outputs signal to control module 3, and control module 3 outputs high level signal to the output in proper order.

Example two

When the host machine check line 6 and the slave machine check line 7 are connected with the secondary cable, the sheaths at two ends of the secondary cable need to be stripped respectively to expose the cable core; therefore, the connection terminals 11 are arranged at the connection ends of the host machine check line 6, the slave machine check line 7 and the secondary cable, and the connection terminals 11 can be of a wire clamp type or a probe type; the probe-style wiring scheme is less variable than the clip-style and is therefore preferred.

When the host common line 5 and the slave common line 9 are connected, the common terminal 12 is provided for the convenience of grounding; we have compared information and selected two schemes; one of the common terminals 12 is an external lead type, and the other is a banana jack type; the banana jack is simple in plugging and unplugging, the field wiring is simple, the common ends of the master and the slave can be connected to the ground, and the use of components is superior to that of an external lead type; it is therefore preferable to use a banana jack as the common terminal.

Furthermore, the external parts of the host unit 1 and the slave unit 2 are easy to damage and need to be protected; as shown in fig. 5 to 6, the master unit 1 is disposed in the master protection box 13, and the slave unit 2 is disposed in the slave protection box 14; the host computer protection box 13 is l multiplied by m multiplied by d =220mm multiplied by 120mm multiplied by 55mm, and the slave computer protection box 14 is l multiplied by m multiplied by d =115mm multiplied by 90mm multiplied by 55 mm; the host computer protection box 13 and the slave computer protection box 14 can be flame-retardant non-transparent boxes or waterproof transparent boxes, if the device shell adopts the flame-retardant non-transparent boxes, the first box has weak corrosion resistance, the situation in the box cannot be observed, and the interactivity is weak; the waterproof transparent box can be used in the field with frequent water vapor sputtering or much moisture or dust, the insulation resistance is more than 10M omega, the waterproof and the corrosion resistant are realized, and the transparent shell can timely find damaged parts and repair and replace the damaged parts; therefore, a waterproof transparent box is preferable; the connection terminals 11 of the host unit 1 are respectively arranged on the upper surface of the host protection box 13, and the common terminal 12 of the host unit 1 is arranged on the side wall of the host protection box 13; a connecting terminal 11 and an indicator light 8 of the extension unit are respectively arranged on the upper surface of the extension protection box, and a common terminal 12 of the extension unit is arranged on the side wall of the extension protection box; the master protection box 13 and the slave protection box 14 protect the master unit 1 and the slave unit 2, respectively.

The above-mentioned fixing methods, if not separately described, all use the means of common technique of those skilled in the art, such as welding, nesting, or screw fixing.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a cable school line appearance which characterized in that: the short circuit protection device comprises a host unit (1) for short-circuiting one end of a secondary cable with a ground wire, and a slave unit (2) for short-circuiting the one end of the secondary cable with the ground wire; the host unit (1) comprises a control module (3); the control module (3) is electrically connected with the power supply module (4), and the output end of the control module (3) is connected with a plurality of host check lines (6); the other end of the host check line (6) is used for being connected with a core wire of the secondary cable; the ground port of the control module (3) is connected with a host common line (5), and the other end of the host common line (5) is used for being connected with a ground wire; the slave unit (2) comprises a plurality of slave check lines (7), and indicator lamps (8) are respectively arranged on the slave check lines (7); one end of the slave check line (7) is used for being connected with a core wire of the secondary cable, and the other end of one end of the slave check line (7) is used for being connected with a ground wire; the control module (3) is used for sequentially outputting high level signals to the output end.

2. The cable alignment instrument of claim 1, wherein: the number of the master machine check lines (6) is the same as that of the slave machine check lines (7).

3. The cable alignment instrument of claim 1, wherein: the slave check lines (7) are connected in parallel and then connected in series with a slave common line (9); the other end of the slave common line (9) is used for connecting with the ground line.

4. The cable calibration instrument of claim 3, wherein: and connecting terminals (11) are arranged at the connecting ends of the host check line (6), the slave check line (7) and the secondary cable.

5. The cable alignment instrument of claim 4, wherein: the connecting terminal (11) is of any one of a wire clamp type or a probe type.

6. The cable alignment instrument of claim 4, wherein: and a common terminal (12) is arranged at the connecting end of the host common line (5), the slave common line (9) and the ground wire.

7. The cable alignment instrument of claim 6, wherein: the common terminal (12) is in any one of an external lead type or a banana socket type.

8. The cable alignment instrument of claim 6, wherein: the host unit (1) is arranged in the host protection box (13), and the slave unit (2) is arranged in the slave protection box (14).

9. The cable calibration instrument of claim 8, wherein: the connection terminal (11) of the host unit (1) is arranged on the upper surface of the host protection box (13), and the common terminal (12) of the host unit (1) is arranged on the side wall of the host protection box (13); the connecting terminal (11) and the indicator light (8) of the extension unit are respectively arranged on the upper surface of the extension protection box, and the public terminal (12) of the extension unit is arranged on the side wall of the extension protection box.