CN112730988B - Temperature sensing cable fireproof detection device for high-speed motor train unit converter - Google Patents
Temperature sensing cable fireproof detection device for high-speed motor train unit converter Download PDFInfo
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- CN112730988B CN112730988B CN202011506763.5A CN202011506763A CN112730988B CN 112730988 B CN112730988 B CN 112730988B CN 202011506763 A CN202011506763 A CN 202011506763A CN 112730988 B CN112730988 B CN 112730988B
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 210000004899 c-terminal region Anatomy 0.000 claims description 6
- 230000002265 prevention Effects 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- Business, Economics & Management (AREA)
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Abstract
The invention relates to a temperature-sensing cable fireproof detection device, in particular to a temperature-sensing cable fireproof detection device for a high-speed motor train unit converter. The problem of current temperature sensing cable fire prevention detection device frequently take place the conflagration misinformation phenomenon of moname, therefore the reliability in use is low is solved. The device comprises a temperature sensing cable with two core wires therein, and a wiring board, wherein six terminal pairs are arranged on the wiring board, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminals of the two terminal pairs are connected with two ends of a first resistor R1, the main terminals of the other two terminal pairs are connected with two ends of a second resistor R2, and the main terminals of the remaining two terminal pairs are used as input ends of a fireproof detection device; the two core wires of the temperature sensing cable, the first resistor R1 and the second resistor R2 are connected in series to form a serial branch circuit through connection between the auxiliary terminals and connection between the two ends of the temperature sensing cable and the auxiliary terminals on the wiring board, and the directions of currents flowing through the two core wires in the temperature sensing cable are opposite in operation.
Description
Technical Field
The invention relates to a temperature-sensing cable fireproof detection device, in particular to a temperature-sensing cable fireproof detection device for a high-speed motor train unit converter.
Background
Along with the vigorous development of the China high-speed rail industry, the fireproof safety of the converter of the high-speed motor train unit is important to the operation of vehicles, and in order to realize the fireproof safety of the converter, a distributed temperature sensor is generally adopted for detecting the temperature in the converter cabinet in real time so as to achieve the aim of fireproof monitoring; however, this type of temperature sensor requires a multi-point arrangement, which is costly to design and requires a large number of points of failure. The fire prevention is also carried out in a mode of distributing smoke-proof and fire-proof pipes in the cabinet body; the smoke-proof fire-proof tube is broken only when the smoke tube is Wen Yanhuo high, so that smoke alarm is triggered, and the disadvantage is that the smoke tube is required to be arranged again after each alarm.
In order to overcome the defects in the prior art, the fireproof detection device for the temperature sensing cable is provided, the internal lead of the temperature sensing cable is a double-core wire, the temperature sensing cable is distributed around the heating component in the converter cabinet body, and detection resistors are connected in series to form a detection loop, and the detection loop is transmitted to the smoke and fire detection unit of the motor train unit. When the component abnormally heats (fires and the like occur), the double-core wires inside the temperature sensing cable are short-circuited, the resistance value of the detection loop can be changed, and when the resistance change value reaches a preset alarm value, the smoke and fire detection unit can send out fire alarm signals to the driver control panel, so that the fire alarm detection and alarm of the converter are realized. However, the existing temperature-sensing cable fireproof detection device often has a fire false alarm phenomenon of a moldy name, and the reliable use of the temperature-sensing cable fireproof detection device is affected.
Disclosure of Invention
The invention solves the problem that the existing temperature-sensing cable fireproof detection device is low in use reliability due to the fact that a false fire alarm phenomenon of a moldy name frequently occurs, and provides the temperature-sensing cable fireproof detection device for the high-speed motor train unit converter. The temperature-sensing cable fireproof detection device is reliable to use.
The invention is realized by adopting the following technical scheme: the temperature sensing cable fireproof detection device for the high-speed motor train unit converter comprises a temperature sensing cable which is coiled in a converter cabinet body and provided with two core wires therein, and a wiring board, wherein six terminal pairs are arranged on the wiring board, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, the main terminals of the two terminal pairs are connected with two ends of a first resistor R1, the main terminals of the other two terminal pairs are connected with two ends of a second resistor R2, and the main terminals of the remaining two terminal pairs are used as input ends of the fireproof detection device; through the connection between each pair of terminals and the connection between the four core wire ends at the two ends of the temperature sensing cable and each pair of terminals on the wiring board, two core wires of the temperature sensing cable, a first resistor R1 and a second resistor R2 are connected in series to form a serial branch which takes two input terminals as the two ends of the branch, and the current flowing through the two core wires in the temperature sensing cable during operation is opposite in direction. It is found by research that: the current direction of two heart yearns of temperature sensing cable that during operation flows through plays crucial effect to the reliable work of temperature sensing cable fire prevention detection device. The motor train unit runs at a high speed (under dynamic state), because the traction power is increased, the current of high-voltage copper bars or cables and other high-voltage equipment in the converter is increased, because the internal space of the converter is limited, the electromagnetic interference around the temperature sensing cable is inevitably caused to be increased, if the current directions of two core wires in the double-core temperature sensing cable are in the same direction, the interference current with the same current direction can be generated, and excessive current is formed after superposition, so that the resistance value uploaded to the smoke and fire detection unit is abnormally hopped, and the smoke and fire detection unit can possibly give out a fire alarm fault by mistake. The wrong wiring pattern is shown in fig. 5. If the two core wires in the temperature sensing cable are opposite in current direction and generate interference current with opposite flowing directions, magnetic field interference can be mutually counteracted in a high-speed running state, abnormal jump of the resistance value uploaded to the smoke and fire detecting unit can not be caused, and a fire alarm fault is wrongly reported. The correct wiring is shown in fig. 6. When the temperature sensing cable fireproof detection device is used, the input end of the temperature sensing cable fireproof detection device is connected with the smoke and fire detection unit of the motor train unit, the smoke and fire detection unit of the motor train unit applies voltage to the two ends of the serial branch circuit, and the resistance value change of the serial branch circuit is monitored, so that the fire alarm detection and alarm of the converter are realized.
The invention creatively discovers the principle of causing the false alarm of the existing temperature sensing cable fireproof detection device for the high-speed motor train unit converter, applies the principle to engineering practice, and ensures the working reliability of the temperature sensing cable fireproof detection device for the high-speed motor train unit converter.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the present invention;
FIG. 3 is a schematic diagram III of the structure of the present invention;
FIG. 4 is a schematic diagram of a temperature sensing cable;
FIG. 5 is a schematic diagram of the current direction of two cores in a temperature sensing cable with a risk of false alarm;
fig. 6 is a schematic diagram of the current direction of two cores in the temperature sensing cable when ensuring reliable operation.
Detailed Description
Example 1
As shown in fig. 1, the temperature sensing cable fireproof detection device for the high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire 2254 of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire 2255 are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; f - is connected with G -, C -、D-、E-、H- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard. In operation, the resistance value measured in normal state is R1+R2, and the resistance measured in case of fire is R2.
In particular, the connector also comprises a connector box, wherein the connector plate is arranged in the connector box, G +、H+ is led out of the connector box, C -、D-、E-、H- is led out of the connector box and marked on the connector box.
Example two
As shown in fig. 2, the temperature sensing cable fireproof detection device for the high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire 2254 of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire 2255 are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; h - is connected with F -, D -、C-、G-、E- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard. In operation, the resistance value measured in normal state is R1+R2, and the resistance measured in case of fire is R2.
In particular, the connector also comprises a connector box, wherein the connector plate is arranged in the connector box, G +、H+ is led out of the connector box, D -、C-、G-、E- is led out of the connector box and marked on the connector box.
Example III
As shown in fig. 3, the temperature sensing cable fireproof detection device for the high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire 2254 of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire 2255 are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; d - is connected with E -, F -、C-、G-、H- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard. In operation, the resistance value measured in normal state is R1+R2, and the resistance measured in case of fire is zero.
In particular, the connector also comprises a connector box, wherein the connector plate is arranged in the connector box, G +、H+ is led out of the connector box, F -、C-、G-、H- is led out of the connector box and marked on the connector box.
Claims (6)
1. A temperature sensing cable fireproof detection device for a high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire (2254) of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire (2255) are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; the temperature sensing cable is characterized in that F - is connected with G -, C -、D-、E-、H- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard.
2. The fire detection device for a temperature sensitive cable of a high speed motor train unit converter according to claim 1, further comprising a terminal box, wherein the terminal block is placed in the terminal box, G +、H+ exits the terminal box, and C -、D-、E-、H- exits the terminal box and marks the terminal box.
3. A temperature sensing cable fireproof detection device for a high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire (2254) of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire (2255) are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; the temperature sensing cable is characterized in that H - is connected with F -, D -、C-、G-、E- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard.
4. A temperature sensitive cable fire protection test apparatus for a high speed motor train unit converter as in claim 3 further comprising a terminal block, the terminal block being positioned within the terminal block, G +、H+ exiting the terminal block, D -、C-、G-、E- exiting the terminal block and marking the terminal block.
5. A temperature sensing cable fireproof detection device for a high-speed motor train unit converter comprises a temperature sensing cable coiled in a converter cabinet body and provided with two core wires therein, and a wiring board; two ends of one core wire (2254) of the temperature sensing cable are marked as A1 and B1, two ends of the other core wire (2255) are marked as A2 and B2, and the A1 and the A2 are positioned at the same end of the temperature sensing cable; the wiring board is provided with six terminal pairs, the six terminal pairs are respectively called C, D, E, F, G, H, each terminal pair is provided with a main terminal and an auxiliary terminal, the main terminal and the auxiliary terminal of the C terminal pair are called C +、C-, the main terminal and the auxiliary terminal of the D terminal pair are called D +、D-, the main terminal and the auxiliary terminal of the E terminal pair are called E +、E-, the main terminal and the auxiliary terminal of the F terminal pair are called F +、F-, the main terminal and the auxiliary terminal of the G terminal pair are called G +、G-, the main terminal and the auxiliary terminal of the H terminal pair are called H +、H-, the main terminal and the auxiliary terminal of each terminal pair are mutually connected on the wiring board, wherein the C +、D+ is connected with two ends of a first resistor R1, the E + 、F+ is connected with two ends of a second resistor R2, and the G +、H+ is used as an input end of a fireproof detection device; the temperature sensing cable is characterized in that D - is connected with E -, F -、C-、G-、H- is respectively marked as A1, A2, B1 and B2, and the four core wire ends at the two ends of the temperature sensing cable are connected with the auxiliary terminals of the wiring board in the same standard.
6. The fire detection device for a temperature sensitive cable of a high speed motor train unit converter as recited in claim 5, further comprising a terminal block, wherein the terminal block is positioned within the terminal block, G +、H+ exits the terminal block, and F -、C-、G-、H- exits the terminal block and marks the terminal block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506763.5A CN112730988B (en) | 2020-12-18 | 2020-12-18 | Temperature sensing cable fireproof detection device for high-speed motor train unit converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011506763.5A CN112730988B (en) | 2020-12-18 | 2020-12-18 | Temperature sensing cable fireproof detection device for high-speed motor train unit converter |
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| CN112730988A CN112730988A (en) | 2021-04-30 |
| CN112730988B true CN112730988B (en) | 2024-06-14 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135512C (en) * | 2000-12-28 | 2004-01-21 | 康达（成都）电子有限公司 | Tunnel fire monitoring alarm device |
| CN101285717A (en) * | 2007-04-12 | 2008-10-15 | 天津消防器材有限公司 | Linear temperature-sensing fire disaster detector possessing anti-electromagnetic interference function |
| JP2010038750A (en) * | 2008-08-06 | 2010-02-18 | Tdk Corp | Magnetic balance type current sensor |
| KR200452360Y1 (en) * | 2009-03-06 | 2011-02-22 | 김민자 | A electric heating controller apparatus using temperature sensing resin and connecting structure of the same |
| CN203720978U (en) * | 2014-01-07 | 2014-07-16 | 孙红梅 | Cable segment encoder |
| CN106028236A (en) * | 2016-06-22 | 2016-10-12 | 青岛海信移动通信技术股份有限公司 | Loudspeaker and terminal |
| CN107680316A (en) * | 2016-08-02 | 2018-02-09 | 青岛中阳消防科技股份有限公司 | A kind of more detection circuit line-type heat detectors based on series thermal-sensitive resistive element |
| CN208076582U (en) * | 2018-04-08 | 2018-11-09 | 浙江正泰电器股份有限公司 | The current divider of anti-alternating magnetic field |
| CN110967643B (en) * | 2019-04-30 | 2021-01-22 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection circuit and method |
| CN111525466B (en) * | 2020-05-25 | 2022-04-19 | 中车大连机车车辆有限公司 | Temperature sensing cable fixing device and vehicle chassis |
-
2020
- 2020-12-18 CN CN202011506763.5A patent/CN112730988B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 《关于地铁中火灾自动报警系统干扰抑制技术的探讨》;张杰 等;《信息通信》;20160515(第5期);全文 * |
| 铁路信号电缆断线故障在线监测与定位方法研究;闵永智;党建武;张雁鹏;;计算机测量与控制;20120425(第04期);全文 * |
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