CN2030961U - Alarm for coach axles temperature - Google Patents

Abstract

The utility model discloses an alarm for coach axles temperature, comprising a probe, a fixed point alarm system and a temperature measurement system; the circuit of the existing alarm is complicated because of the structure, and the false alarm always appears; the probe of the utility model adopts a dual metal temperature relay as a temperature measurement element, and the temperature measurement adopts the fixed point selection temperature measurement mode; the functions of alarm and temperature measurement can be achieved simultaneously. The utility model has the advantages of simple circuit, high reliability and easy maintenance.

Description

Alarm for coach axles temperature

A kind of monitoring and temperature alarm of passenger train Wheel bearing temperature in service.

Present existing passenger car journal temperature warning device is to adopt eight probes, automatically the mode of cycle checkout.Temperature signal on eight bearings is input to respectively in the instrument that is placed in the attendant's room, eight probe signals are converted to the electric signal of digital quantity, indicate the temperature of each position in turn, through comparing with given signal, when the temperature signal of measuring surpasses given signal, by the loudspeaker auto alarm.The probe of axle temperature annunciator major part adopts platinum resistance or two kinds of forms of semi-conductor integrated circuit at present, and instrument power source adopts 48 volts of direct current (DC) on the passenger vehicle, through inversion, supplies with metering circuit work behind the rectifying and voltage-stabilizing.The major defect that this axle temperature annunciator exists is, because probe adopts platinum resistance, resistor wire easily breaks and produces the instrument flase alarm, adopt semi-conductor integrated circuit, input impedance height, moisture resistance poor performance, often change the impedance of incoming signal, make instrument produce mistake measurement, flase alarm because of probe makes moist; In addition because instrument uses the train power supply, though adopted the voltage stabilizing measure, the still very big breakdown phenomenon of burning of circuit component that often occurs of power-supply fluctuation.Existing axle temperature annunciator is the mode that adopts automatic cycle checkout, so the circuit more complicated, and easy-maintaining does not use.

The purpose of this utility model is to overcome the shortcoming that existing passenger car journal temperature warning device exists, and it is simple to propose a kind of circuit, keeps in repair warning device easy to use, reliable, avoids flase alarm to guarantee the passenger train safe in operation.

Major technique content of the present utility model is, this passenger car journal temperature warning device is made up of probe (1) fixed point warning (2), measuring system (3), probe has on eight eight axle box shells that are installed in passenger vehicle respectively, and every probe is by warning diode D ₁, D ₃, D ₅, D ₇, D ₉, D ₁₁, D ₁₃, D ₁₅With bi-metal temperature relay WJ ₁-WJ ₈Series connection back and PN junction temperature sensor D ₂, D ₄, D ₆, D ₈, D ₁₀, D ₁₂, D ₁₄, D ₁₆Parallel connection is contained in the probing shell of being made by the copper shell (6), and draws two line A, B and temp measuring system and is connected with the fixed point warning, and this probe is installed on the axle box of passenger vehicle by the gong bolt (7) of popping one's head in; Temp measuring system (3) adopts button to select metering system, by 3 1/2 A/D turnover number word table Z and thermometric button K _1-3-K _8-3Form, press corresponding button when measuring the axle temperature of coordination not; Fixed point warning (2) adopts sound and light alarm, by warning indicator lamp (D ₁₈-D ₂₅), loudspeaker W and intermediate relay J ₁-J ₈And the contact composition, after surpassing the value of regulation, a certain position axle temperature can report to the police behind the energized E.

Technique effect of the present utility model is that this annunciator had both been finished fixed point and reported to the police, and the measurement function before and after having realized again reporting to the police is strong; Because it is not probe has adopted 1-8 position bi-metal temperature relay and PN junction temperature sensor, therefore reliable fragile; Temp measuring system adopts dry cell power supply not to be subjected to the influence of power-supply fluctuation; Circuit structure is simple, and is easy to maintenance, cheap.

Accompanying drawing 1 is a block scheme of the present utility model;

Accompanying drawing 2 is schematic circuit diagram of the present utility model;

Accompanying drawing 3 is a probing shell structural representation of the present utility model;

1 probe segment, 2 fixed point warnings, 3 temp measuring systems, 4 probe inner member positions, 5 probing shell glands, 6 probing shells, 7 probe gong selects.D ₂, D ₄, D ₆, D ₈, D ₁₀, D ₁₂, D ₁₄, D ₁₆1-8 position thermometric PN junction temperature sensor, D ₁D ₃D ₅D ₇D ₉D ₁₁D ₁₃D ₁₅1-8 position warning diode, WJ ₁-WJ ₈1-8 position bi-metal temperature relay, J ₁-J ₈1-8 position intermediate relay, K _1-3-K _8-31-8 thermometric button, 1/2 A/D turnover number of Z3 word table J _1-1-J _8-1, J _1-2-J _8-21-8 position intermediate relay contact, K _1-1-K _8-1, K _1-2-K _8-21-8 thermometric button contact, K ₉Source switch, E9 volt dry storage battery, K ₁₀Thermometric reading button, D ₁₇Power light, D ₁₈-D ₂₅Warning indicator lamp, R ₁R ₂Resistance, W loudspeaker.

Realize that preferred plan of the present utility model is, this passenger car journal temperature warning device is made up of probe (1) fixed point warning (2), temp measuring system (3), and characteristics of the present invention are that probe has eight, and every probe is by warning diode D ₁, D ₃, D ₅, D ₇, D ₉, D ₁₁, D ₁₃, D ₁₅With bi-metal temperature relay WJ ₁-WJ ₈Series connection back and PN junction temperature sensor D ₂, D ₄, D ₆, D ₈, D ₁₀, D ₁₂, D ₁₄, D ₁₆Parallel connection is contained in the probing shell of being made by the copper shell (6), and draws two line A, B and temp measuring system and is connected with the fixed point warning, and this probe is installed on the axle box of passenger vehicle by the gong select (7) of popping one's head in; Temp measuring system (3) adopts button to select metering system, by 3 1/2 A/D turnover number word table Z and thermometric button K _1-3-K _8-3And corresponding contact K _1-1-K _8-1, K _1-2-K _8-2, change-over swith K ₁₀, 9V battery E forms; Fixed point warning (2) adopts sound and light alarm, by warning indicator lamp (D ₁₈-D ₂₅), loudspeaker W, intermediate relay J ₁-J ₈And contact J _1-1-J _8-1, J _1-2-J _8-2Form.Bi-metal temperature relay WJ ₁-WJ ₈Action when being chosen as 90 ℃, thus intermediate relay J cut off ₁-J ₈Power supply makes its release, normally closed contact J _1-1-J _8-1, J _1-2-J _8-2Connect corresponding warning indicator lamp D respectively ₁₈-D ₂₅, alarming horn W sends alerting signal.

The principle of work of this axle temperature annunciator such as Fig. 2 are example with first bearing, and the probe of first bearing is by normally closed bi-metal temperature relay WJ ₁With warning diode D ₁Series connection back and PN junction temperature sensor D ₂Formation in parallel.The working process that fixed point is reported to the police is, when turning on the power switch K ₉The time+48V passenger vehicle power supply process K ₉Contact 2, thermometric button K _1-3Normally closed node K _1-1, intermediate relay J ₁To the A point, by warning diode D ₁With the ground wire formation loop of bi-metal temperature relay to B point and power supply, J at this moment ₁Energising makes its normally closed node J _1-1, J _1-2Open warning indicator lamp D ₁₈Do not work, loudspeaker do not ring, simultaneously PN junction temperature sensor D ₂Because of instead not conducting partially of voltage.When first bearing temperature during up to 90 ℃, first probe be overheated to make it be contained in bi-metal temperature relay WJ in the probing shell (6) ₁Disconnect, make loop current cut off intermediate relay J ₁Dead electricity discharges, normally closed contact J _1-1, J _1-2Restore closed, at this moment+the 48V power supply passes through K ₉Contact 2, resistance R ₁, warning indicator lamp D ₁₈, normally closed contact J _1-1Constitute loop, D with the ground wire of power supply ₁₈The bright alerting signal of sending of warning indicator lamp, simultaneously+48V passes through K ₉Contact 2, resistance R ₂, normally closed contact J _1-2, alarming horn W and power ground constitute the loop, loudspeaker send warning.Finish the function that fixed point is reported to the police; The working process of thermometric is the power cutoff K switch ₉Make it as for 3,4 positions, press thermometric button K _1-39V dry storage battery E is connected to 3 1/2 A/D turnover number word table Z, presses thermometric reading button K simultaneously ₁₀Make it as for 1,2 positions, this moment is because K _1-3Press so K _1-2Closure, K ₁₀Contact 1 pass through K _1-2With the A PN junction temperature sensor D that names a person for a particular job ₂The axle temperature of being experienced is by B point, K ₉Contact 3 to K ₁₀Contact 2 send in 3 1/2 A/D turnover number word table Z, can demonstrate the temperature value of first bearing.Before fixed point is reported to the police, because of D ₁Z is a reverse bias with respect to the turnover number word table, and it is very big to be resistance, does not influence D ₂Thermometric; When fixed point is reported to the police the back thermometric, because of WJ ₁Disconnected D ₁Be in open-circuit condition, also do not influence D ₂Thermometric.

The method of operation of this axle temperature annunciator:

Fixed point is reported to the police, and only need turn on the power switch K ₉, this moment indicator lamp D ₁₇Bright, instrument enters fixed point warning mode of operation.When certain axle temperature surpasses 90 ℃, corresponding axle position warning indicator lamp (D ₁₈-D ₂₅) bright, loudspeaker ring.

Thermometric is at first with source switch K ₉Shutoff is pressed the button (K that desires thermometric axle position again as for 3,4 positions _1-3-K _8-3), press thermometric reading button K simultaneously ₁₀, this moment, turnover number word table Z promptly demonstrated the temperature of the axle position of surveying.

Claims (2)

1, a kind of passenger car journal temperature warning device is made up of probe (1), fixed point warning (2), temp measuring system (3), and characteristics of the present invention are that probe has eight, and every probe is by warning diode D ₁, D ₃, D ₅, D ₇, D ₉, D ₁₁, D ₁₃, D ₁₅With bi-metal temperature relay WJ ₁-WJ ₈Series connection back and PN junction temperature sensor D ₂, D ₄, D ₆, D ₈, D ₁₀, D ₁₂, D ₁₄, D ₁₆Parallel connection is contained in the probing shell of being made by the copper shell (6), and draws two line A, B and temp measuring system and is connected with the fixed point warning, and this probe is installed on the axle box of passenger vehicle by the gong bolt (7) of popping one's head in; Temp measuring system (3) adopts button to select metering system, by 3 1/2 A/D turnover number word table Z and thermometric button K _1-3One K _8-3Form, press corresponding button when measuring the axle temperature of coordination not; Fixed point warning (2) adopts sound and light alarm, by warning indicator lamp (D ₁₈-D ₂₅), loudspeaker W and intermediate relay J ₁-J ₈And the contact composition, after surpassing the value of regulation, a certain position axle temperature can report to the police behind the energized E.

2, bi-metal temperature relay WJ according to claim 1 ₁-WJ ₈Action when being chosen as 90 ℃, thus intermediate relay J cut off ₁-J ₈Power supply makes its release, normally closed contact J _1-1-J _8-1, J _1-2-J _8-2Connect corresponding warning indicator lamp D respectively ₁₈-D ₂₅With loudspeaker W.

Images