CN202084903U

CN202084903U - Power failure protection circuit for sliding contact wire of material piling and taking machine

Info

Publication number: CN202084903U
Application number: CN201120214174XU
Authority: CN
Inventors: 陆伟
Original assignee: Chongqing Iron and Steel Group Co Ltd
Current assignee: Chongqing Iron and Steel Co Ltd
Priority date: 2011-06-23
Filing date: 2011-06-23
Publication date: 2011-12-21
Anticipated expiration: 2021-06-23

Abstract

The utility model provides a power failure protection circuit for a sliding contact wire of a stacker-reclaimer. The power failure protection circuit comprises a three-phase inlet bus, wherein the three-phase inlet bus is accessed from an external power supply and connected with a power supply interface of the stacker-reclaimer to form a power supply circuit, a main contact is arranged on the power supply circuit and used for controlling the on/off of the circuit, intermediate relays are respectively connected with an inlet wire L1, an inlet wire L2 and an inlet wire L3 of the three-phase inlet bus, control switches of the three intermediate relays J1, J2 and J3 are connected in series with a contactor to form a control circuit, two ends of the control circuit are connected in parallel with the power supply circuit, and the contactor is used for controlling the on/off of the main contact in the power supply circuit. When the power failure protection circuit is adopted, the power failure of any-phase inlet wire can be detected in time, and a main power supply can be switched off, so that an accident is prevented from expansion, and the whole line is prevented from burnout; and moreover, the operation efficiency of equipment is increased, the overhaul and maintenance cost is lowered, and the stop times of the equipment are obviously reduced.

Description

Stacker-reclaimer trolley power down protection circuit

Technical field

The utility model relates to a kind of protective circuit, is specially the trolley power down protection circuit on the stacker-reclaimer.

Background technology

The stacker-reclaimer of stock yard is the supply power mode that adopts the trolley phase three-wire three, is connected by current-collector between stacker-reclaimer and the trolley.But along with the variation of the aging gradually and external environment condition of equipment (as the distortion of buildup, track and trolley integral support etc.), make and current-collector between stacker-reclaimer and the trolley in running, have misoperation, false situation of jumping electricity (showing as current-collector breaks away from the wiping wire casing and reset fast again, cause momentary power failure), this can cause to produce and interrupt, and the attendant is difficult to detect the position that fault takes place; And even more serious be, after current-collector breaks away from the wiping wire casing, the car load of stacker-reclaimer is not outage but, the material machine will continue to move, the current-collector of having job-hoped in moving process can make related accessory such as hanging on the whole piece trolley, connecting box suffer badly damaged, current-collector itself also produces earth fault probably, when serious the whole piece trolley is burnt out.

The utility model content

At the prior art above shortcomings; the purpose of this utility model is to solve the problem that causes whole piece trolley circuit to be burnt out after the power down easily between stacker-reclaimer and the trolley; and provide a kind of can be when the trolley power down takes place; timely to car load outage, the trolley power down protection circuit that protection circuit is not burnt out.

The technical solution of the utility model: stacker-reclaimer trolley power down protection circuit, comprise the three-phase inlet wire bus that inserts from external power source, described three-phase inlet wire bus links to each other with the power interface of stacker-reclaimer and forms electric power loop, is provided with the main contact KM that is used to control this loop break-make on described electric power loop; It is characterized in that, on three inlet wire L1, L2 of three-phase inlet wire bus and L3, also respectively be connected with an auxiliary relay; Often open auxiliary contact K1, K2 and the K3 of described three auxiliary relay J1, J2 and J3 form control loop with the contactor K back of connecting, and the two ends and the electric power loop of described control loop are connected in parallel; Described contactor K is used for controlling the break-make of electric power loop main contact KM.

Protective circuit of the present utility model is when stacker-reclaimer is worked; control the break-make of described control loop by auxiliary relay; when control loop disconnects; being connected on contactor in the control loop also can be de-energized and quit work; after the contactor outage, the main contact that contactor is controlled will disconnect, and make whole electric power loop be disconnected; make stacker-reclaimer outage, purpose out of service thereby reach.

On three inlet wire buses, be equipped with auxiliary relay in the utility model, its objective is and prevent that any bus from disconnecting the back and electric power loop still continues as the stacker-reclaimer power supply, like this as long as any bus breaks down, corresponding auxiliary relay is all with automatic disconnection, make control loop also disconnect, realize the purpose in deenergization loop, ensured the safe operation of overall stack reclaimer production line, avoided taking place the accident that circuit burns out.

With respect to prior art, the utlity model has following beneficial effect:

The whole piece circuit is burnt out when 1, having avoided the trolley power down: protective circuit of the present utility model is by inserting an auxiliary relay respectively on three inlet wires in three-phase inlet wire bus bar circuit; and the auxiliary contact of often opening of three auxiliary relays is connected in series in the control loop; come the control power supply of truck is directly controlled by the break-make of control loop; thereby realized when any phase inlet wire goes offline; can both detect and disconnect main power source timely; the accident that prevents enlarges, and has avoided the whole piece circuit to be burnt out.

2, improved equipment operating efficiency, reduced maintenance, maintenance cost, equipment stoppage in transit number of times obviously reduces, and has directly improved production efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model stacker-reclaimer trolley power down protection circuit; auxiliary relay J1, J2 among the figure and J3 often open auxiliary contact K1, K2 and K3; and the control switch of connecting with contactor K is same device, and this is just to show in the time-division game clock of drawing.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 1; stacker-reclaimer trolley power down protection circuit of the present utility model; comprise three-phase inlet wire bus L1, the L2 and the L3 that insert from external power source; described three-phase inlet wire bus links to each other with the power interface VCC of stacker-reclaimer and forms electric power loop; be provided with the main contact KM that is used to control this loop break-make on described electric power loop, electric power loop is powered to stacker-reclaimer when main contact KM is closed.On three inlet wire L1, L2 of three-phase inlet wire bus and L3, also respectively be connected with auxiliary relay J1, a J2 and J3; Often open auxiliary contact K1, K2 and the K3 of described three auxiliary relay J1, J2 and J3 form control loop with the contactor K back of connecting, and the two ends and the electric power loop of described control loop are connected in parallel; Described contactor K is used for controlling the break-make of electric power loop main contact KM.When contactor K was closed, main contact KM was also with closure; When contactor K disconnected, main contact KM disconnected immediately.Here employed contactor K and main contact KM, and auxiliary relay J1, J2 and J3 are existing electronic devices and components, the utility model has been realized control to electric power loop by auxiliary relay and control loop, guaranteed when three-phase bus breaks down, deenergization prevents that stacker-reclaimer from continuing operation and causing the accident timely.

Claims

1. stacker-reclaimer trolley power down protection circuit, comprise the three-phase inlet wire bus that inserts from external power source, described three-phase inlet wire bus links to each other with the power interface of stacker-reclaimer and forms electric power loop, is provided with the main contact KM that is used to control this loop break-make on described electric power loop; It is characterized in that, on three inlet wire L1, L2 of three-phase inlet wire bus and L3, also respectively be connected with an auxiliary relay; Often open auxiliary contact K1, K2 and the K3 of described three auxiliary relay J1, J2 and J3 form control loop with the contactor K back of connecting, and the two ends and the electric power loop of described control loop are connected in parallel; Described contactor K is used for controlling the break-make of electric power loop main contact KM.