CN2099698U - Safety and energy-saving rectification apparatus for mine traction locomotive - Google Patents

Abstract

The utility model relates to a safety and energy-saving rectification apparatus for mine traction locomotives. The alternating-current power can be converted into direct-current power by the utility model, a rectifier transformer and a main rectifier are controlled by a bidirectional thyristor, a starting power supply rectification loop is connected with a bidirectional thyristor trigger circuit in series after is connected with a keeping power supply rectification loop in parallel; then, the starting power supply rectification loop is connected with the main rectifier in parallel. The safe voltage of 36 volts is output from the rectification apparatus when the rectification apparatus is in a zero-load state, and the bidirectional thyristor trigger circuit KT is automatically switched on after the rectification apparatus is in a load state. Meanwhile, the rectifier transformer and the main rectifier work. The rectifier transformer is automatically switched off after the load of the rectification apparatus is cut off; thereby, the effect of energy saving is achieved, and the electricity quantity can be saved by 60 kilowatt-hours every day. The utility model can be used as a direct-current welding machine, so that the utility model reaches the effect of one machine with double purposes.

Description

Safety and energy-saving rectification apparatus for mine traction locomotive

The utility model belongs to the rectifying device that the AC power input is transformed to dc power output, particularly a kind of mining hauling engine energy-saving safe rectifying device.

In the mine, the power supply of hauling engine is to use direct supply substantially, the silicon rectifier device that present mine is used, generally be to adopt better simply rectifier transformer output to connect bridge rectifier, and the hauling engine in mine is not connection work, and the mine place is narrow, just continuous work zone, silicon rectifier device starting back, in hauling engine loading and when out of service, rectifier transformer just has open circuit loss, and the unloaded output voltage of rectifier has 270 volts or 600 volts.The people walked on railway constitute a threat to.

The purpose of this utility model provides and a kind ofly can drop into automatically or excise according to mine hauling engine operation or situation about stopping, and locomotive is output as the mining hauling engine energy-saving safe rectifying device of safety voltage when stopping.

The utility model is realized with following mode: mining hauling engine energy-saving safe rectifying device comprises by rectifier transformer B ₁Output meets main converter ZL ₁The transformation rectifying circuit that constitutes, the switch circuit that is made of one group of triac KT is serially connected in rectifier transformer B ₁And between the power supply.After the accessory feed rectifying circuit serial connection triac trigger control circuit, with the mouth of transformation rectifying circuit and connect.The output control contact τ of triac trigger control circuit _K1And the moving K switch of catcher ₁, the conducting of the triac KT in the master cock circuit and ending.

The accessory feed rectifying circuit is by the startup power supply commutating circuit and connects and keep the power rectifier loop to constitute that the startup power supply commutating circuit is by being connected on supply transformer B ₂Rectifier ZL in the low pressure tap ₃Output meets diode ZP and constitutes.Keeping the power rectifier loop is by being connected on supply transformer B ₂Rectifier ZL in the high pressure tap ₂The output control contact τ of control circuit is sent out in the output contact _K1-1Constitute.The triac trigger control circuit is by adjustable resistance R ₁And succeed electrical equipment τ ₁Constitute.Rectifier transformer B in the transformation rectifying circuit ₁Secondary side voltage tap and shunting switch K are arranged ₂

The utility model, owing to adopt the automatic input or the excision of triac control rectifying device, and be output as safety voltage when unloaded, and the rectifier transformer secondary of this rectifying device then adopts the voltage tap switch, and this rectifying device also can be used as the DC welder of down-hole and uses.So this rectifying device can be eliminated the open circuit loss of rectifier transformer, reach energy-conservation effect: as: 65KVA rated current 200A, the rectifier transformer of voltage 275V, open circuit loss reaches 5KVA, and the utility model open circuit loss has only 10VA.Being output as the safety voltage of 36V when unloaded, can removing the security threat of miner when walking in the down-hole, is a kind of rectifying device energy-conservation and safe in utilization that has.

Fig. 1 is the utility model block scheme.

Fig. 2 is the utility model schematic circuit diagram.

Below in conjunction with accompanying drawing the utility model is described in further detail:

In Fig. 1, Fig. 2, mining hauling engine energy-saving safe rectifying device is made up of switch circuit (1), transformation rectifying circuit (2), triac trigger control circuit (3), accessory feed rectifying circuit (4).Transformation rectifying circuit (2) is by a three-phase rectifier transformer B ₁Output meets three-phase bridge main converter ZL ₁Constitute.At three-phase rectifier transformer B ₁The secondary low-voltage side voltage tap and shunting switch K are arranged ₂, be used for further reducing voltage and do the DC welder use, reach dual-use.Three phase transformer B ₁Secondary low-voltage side when being full voltage, be used for making power supply to hauling engine.Resistance R ₂The serial connection capacitor C is attempted by three-phase bridge main converter ZL ₁Mouth, as discharge loop, overcurrent relay τ ₂Be serially connected in mouth as overcurrent protection, volt meter V and amperemeter/ammtr A are as monitoring.Switch circuit (3) is made of three triac KT, and three triac KT are serially connected in three-phase rectifier transformer B respectively ₁And between the power supply three-phase air switch ZK.Triac trigger control circuit (3) is by adjustable resistance R ₁And succeed electrical equipment τ ₁Constitute adjustable resistance R ₁Be used for current limliting, the utility model adopts adjustable resistance R ₁And meet current relay τ ₁Constitute, and at current relay τ ₁Serial connection overcurrent relay τ in the loop ₂Normally closed contact, be used for the overcurrent protection of device.Current relay τ ₁Normal opened contact τ _K1And the moving K switch of catcher ₁After, serial connection current-limiting resistance R ₃, be connected between the trigger electrode and power supply of the triac KT in the switch circuit (1), be used to control the conducting of triac KT and end.After accessory feed rectifying circuit (4) the serial connection triac trigger control circuit (3), with the mouth of transformation rectifying circuit (2) and connect, accessory feed rectifying circuit (4) is by the startup power supply commutating circuit and connects and keep the power rectifier loop to constitute; The startup power supply commutating circuit is by being connected on supply transformer B ₂Rectifier ZL in the low pressure tap ₃Meeting diode ZP with its dc output end constitutes; Keeping the power rectifier loop is by being connected on supply transformer B ₂Rectifier ZL in the high pressure tap ₂Contact the current relay τ that sends out in the control circuit (3) with its dc output end ₁Normal opened contact τ _K1-1Constitute.Rectifier ZL ₂, ZL ₃Be single phase bridge rectifier, supply transformer B ₂Be single transformer, its secondary side has a high-head and low pressure tap, and low pressure tap output voltage is 36 volts, and the high-head output voltage is higher 10 to 20 volts than the voltage of rectifying device output, and diode ZP is used for isolation rectification device ZL as reverse blanking tube ₂, ZL ₃Supply transformer B ₂The primary power source side through contactless switch contact 1C power connection.

Principle of work: close automatic air-break switch ZK and contactless switch contact 1C, voltage transformer B ₂Enter mode of operation, rectifier ZL ₃Export 36 volt-amperes of full voltages, through diode ZP, adjustable resistance R ₁With current relay τ ₁After, be added in rectifier ZL ₁Mouth, this moment main converter ZL ₁No current in the circuit when not having bringing onto load, current relay τ ₁Discharge rectifier ZL ₂Output loop and rectifier ZL1 mouth disconnect, and also promptly say current relay τ ₁Normal opened contact τ _K1-2Disconnect, and the break trigger loop is ended silicon control, rectifier transformer B ₁Quit work.As main converter ZL ₁Bringing onto load when work at first is that 36 volts voltage is added in the load, at this moment current relay τ ₁In have that electric current flows through, starting current relay τ ₁, make its normal opened contact τ _K1And τ _K1-1Close normal opened contact τ _K1After closing, trigger triac KT conducting, rectifier transformer B ₁Work, output voltage is through main converter ZL ₁After the rectification, supply load direct supply, main converter ZL ₁Output voltage be 275 volts, be holding current relay τ ₁Continue to keep adhesive, current relay τ ₁Normal opened contact τ _K1-1Close rectifier ZL ₂The output DC source is through current relay τ ₁And meet rectifier ZL ₁Mouth because rectifier ZL ₂Output voltage is than main converter ZL ₁Output voltage high 10 to 20 volts, so can holding current relay τ ₁Adhesive, the conducting that keeps triac KT, rectifying device work.When load disconnects the back owing to current relay τ ₁Middle no current, current relay τ ₁Discharge, triac KT ends, and rectifying device quits work, voltage transformer B ₁Quit work, when reaching no-load, reduce open circuit loss, and the output voltage of rectifying device is 36 volts a safety voltage during no-load.In the time will using welding generator, with hand switch K ₁Close triac KT conducting, hand switch K ₂Be combined in the low pressure tap of rectifier transformer, promptly can be used as DC welder and use, reach dual-use.

Claims (4)

1, a kind of mining hauling engine energy-saving safe rectifying device, it comprises by rectifier transformer B1 output and meets main converter ZL ₁The transformation rectifying circuit [2] that constitutes, it is characterized in that: the switch circuit [1] that is made of one group of triac KT is serially connected between rectifier transformer B1 and the power supply; After accessory feed rectifying circuit [4] the serial connection triac trigger control circuit [3], with the mouth of transformation rectifying circuit [2] and connect; The output control contact τ of triac trigger control circuit [3] _K1And the moving K switch of catcher ₁, the conducting of the triac KT in the master cock circuit [1] and ending.

2,, it is characterized in that accessory feed rectifying circuit (4) is by the startup power supply commutating circuit and connects and keep the power rectifier loop to constitute according to the described rectifying device of claim 1.The startup power supply commutating circuit is by being connected on supply transformer B ₂Rectifier ZL in the secondary low-voltage tap ₃Output meets diode ZP and constitutes.Keeping the power rectifier loop is by being connected on supply transformer B ₂Rectifier ZL on the secondary high-pressure head ₂The output that control circuit (3) is sent out in the output contact goes out to control contact τ _K1-1Constitute.

3,, it is characterized in that triac trigger control circuit (3) is by adjustable resistance R according to the described rectifying device of claim 1 ₁And succeed electrical equipment τ ₁Constitute.

4,, it is characterized in that the rectifier transformer B in the transformation rectifying circuit (2) according to the described rectifying device of claim 1 ₁Secondary side voltage tap and shunting switch K are arranged ₂

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