CN2203800Y - Automatic-drop off switch for motor power - Google Patents

Abstract

The utility model provides an automatic-falling switch for the motor power. The utility model relates to a household appliance element in an electric power system. The utility model mainly solves the problems that the existing falling switch has poor security performance, the existing falling switch can not realize automation control, etc. The utility model is mainly characterized in that a motor is arranged in a supporting porcelain cover. A speed reducing mechanism is dragged. Through a force transference disk, the force of a spring is stored. The force transference disk generates the actual force to drive a deflector rod to cause a moving contact to make on-off action. The speed reducing mechanism adopts two-stage worm wheels and worms or gears to screw-drive. A manauto conversion device can be arranged between the deflector rod and the moving contact. The utility model is used for the electric transmission and transformation networks in the electric power system.

Description

Automatic-drop off switch for motor power

The utility model relates to a kind of electric power system electric power original paper.

It is connection, the overload that is used in the electric power power transmission and transformation network to realize between power high voltage line and the low-tension transformer that motor is derived from moving drop switch; functions such as short-circuit protection; it is indispensable electrical equipment original paper in the electric power power transmission and transformation power process; for many years; domestic dispatch from foreign news agency adopts with the mode of operation of automatic drop switch always and manually operates with the High-Voltage Insulation rod; there is poor stability in this mode of operation, and the labour intensity height can not be realized weakness such as control automatically.In recent years, the domestic people of having begins one's study, and (patent No.: 89216323.2) this switch is made up of three parts " magnetic control does not have the automatic drop switch of the operation of pressure ", that is: switch sections, the manipulator part, automatically controlled part, during work, with the master cock realization merging again of automatically controlled part control manipulator behavior (core is an electromagnet) manipulator, detach procedure, the more manual drop switch of the drop switch of this pattern has had the variation of matter on mode of operation, basically overcome the weakness of former switch, but, this construction of switch complexity, big (being the twice of former switch) manipulator part of volume and electric control part separation structure are cumbersome, manufacture difficulty is big, complete machine cost height (be former switch cost three times) the most important thing is, the operation of the pressure electromagnet principle of not having that the core institution manipulator of this switch partly adopts is made, that is: electromagnet coil is uncharged at ordinary times, just iron core is magnetized in the moment of adhesive, promptly lean on the magnetic force of self to make then, lower core keeps attracting state, the process that magnet breaks away from is that iron core is oppositely magnetized, make the iron core demagnetization, active force by spring makes then, lower core breaks away from, as everyone knows, the process that a self-demagnetization is all arranged after any ferromagnetic material magnetizes, prolongation along with the time, magnetic force can weaken gradually, particularly clashed into, electromagnetic interference, high temperature, under the situations such as iron core corrosion, can rapid loss of excitation, and the iron core of this magnet to be he that make with common material 45# steel have a demagnetization equally, the phenomenon of loss of excitation exists, make the switch misoperation, therefore, the reliability of this switch is relatively poor.Because there is above weakness in this switch, so promotion and application are restricted.

Should realize the adhesive of automatic drop switch with the method for Electromagnetic Control, it is feasible breaking away from this imagination of action, compare with old mode of operation, it has improved fail safe, can under any weather condition, operate, if can realize the far distance controlled of transformer station to each minute transformer with microcomputer network, realize the requirement that partial power " is rationed the power supply and do not drawn the road ", thereby further energy savings, cut the waste, but the key of problem is that this switch must possess high reliability, fail safe, practicality, low conditions such as cost, otherwise just be difficult to promote at power department.

The purpose of this utility model provides a kind of novel automatic drop switch, and to overcome the above-mentioned shortcoming of do not have pressing the automatic drop switch of operation to exist, the imagination that makes automatic switch comes true and the switch of new generation that designs as early as possible.

Motor is derived from moving drop switch general structure can be divided into three parts, it is switch sections, motor actuating element and computer part, the power source of switch is selected DC motor for use, actuating element is organically integrated with switch sections, thereby has reached high reliability, fail safe, practicality, volume is little, simple in structure, cost is low basic demand.

Switch sections has kept all functions of the automatic drop switch of former manual operation, and its main parts size is general with former switch.It is mainly by support bushing, upper and lower fixed contact, and moving contact is formed.

The motor actuating element mainly is made up of motor, interlock reducing gear, force transmiting disk, storage power spring and driving lever, motor is loaded in the switch insulator, be connected with the interlock reducing gear of bottom through the power transmission rod, the mode that this mechanism adopts overdrive clutch be loaded on coaxial force transmiting disk and link to each other, force transmiting disk drives the storage power spring storage power that links to each other, and makes force transmiting disk generation sudden forces drive coupled driving lever action, interlock reducing gear and adopts two-stage worm gear, worm screw or worm and gear--two kinds of forms of worm drive.Between driving lever and moving contact, be provided with manual automatic transfer equipment.From integral body, the actuating element of this switch and former switch sections combine closely, and its volume only increases slightly, thereby handle all shortcomings of bringing owing to select for use the motor source that is used as power fundamentally to overcome electromagnet simultaneously.

Computer control part is made up of reflector, actuator and battery, can realize U, V, W single movement with its control motor, automatic sequence action, and starting automatically, time-delay such as stops at function.

Motor is derived from moving drop switch and magnetic control not to be had the automatic drop switch of the operation of pressure and compare and have following major advantage: 1, the power source of switch becomes motor by electromagnet, thereby thoroughly eradicated the misoperation that causes because of the electromagnet loss of excitation, improved the reliability of complete machine greatly; 2, motor is put in the switch magnetosheath, transmission mechanism is combined as a whole with switch sections, becomes a present cover mechanism by two cover mechanisms of magnetic switch, has promptly dwindled volume and has simplified the structure and reduced cost, compare with magnetic control band manipulator switch, every cover reduces cost about 40%; 3, easy for installation, standardization, generalization degree height, 50% above part can be general with hand switch.

Introduce the utility model embodiment in detail below in conjunction with accompanying drawing.

Accompanying drawing is the utility model (transmission of two-stage worm and gear) structural representation.Know by figure, the utility model is mainly by miniature cocurrent electromotor (5), and insulation power transmission rod (6) is worm screw (7) initiatively, worm driver gear (8), driven worm screw (9), driven worm gear (10), force transmiting disk (11), driving lever (12), storage power spring (13), the manual upper and lower fixed contact of automatic transfer equipment (14) (1.4), moving contact (3), support bushing (2) and gear housing (15) are formed.Motor (5) is arranged in the support bushing (2), be connected with active worm screw (7) through insulation power transmission rod (the power transmission rod is the porcelain insulating material), initiatively the same worm driver gear of worm screw (7) (8) is connected with a joggle, worm driver gear (8) is with coaxial the linking of driven worm screw (9), and driven worm screw (9) connects with driven worm gear (10) engagement.The same force transmiting disk of driven worm gear (10) (11) is loaded on the same axle, the storage power spring same force transmiting disks of (13) one ends (11) connect the other end and are fixed on the gear housing (15), the driving lever same moving contacts of (12) one ends (3) connect, and the other end places the opening portion of force transmiting disk (11).Upper and lower fixed contact (1.4) is separately fixed at the top and bottom of support bushing (2), and manually the same respectively moving contact of automatic transfer equipment (14) (3) links to each other with driving lever (12).This motor is derived from when moving drop switch work and sends instruction with remote controller, computer controller carries out " just changeing " by the command request output signal to motor, " time-delay ", " stop " or " counter-rotating ", the control that " time-delay " " stops " (can single-phasely being carried out, also can automatic sequence carry out) drive initiatively worm screw (7) through power transmission rod (6) when motor (5) rotates and rotate, initiatively worm screw (7) drives worm driver gear (8) and rotates the deceleration of the realization first order, worm driver gear (8) is rotated then driven worm screw (9) and is rotated thereupon, rotate thereby drive driven worm gear (10), realize second level deceleration.Driving the force transmiting disk (11) that is loaded on the same axle when worm gear (10) rotates rotates, storage power spring (13) action that drive linked to each other when force transmiting disk (11) rotated makes it be subjected to the tension elongation and carries out Chu Li, when storage power spring turns over central pivot point, discharge elastic force force transmiting disk is carried out reaction, make force transmiting disk produce sudden forces and drive driving lever (12) action, drive switch movable contact (3) by driving lever (12) and finish adhesive or break away from action.For the reliability of guaranteeing to move is provided with manual operation and operation switching mechanism automatically.When breaking down,, can carry out manual operation as long as switching mechanism (14) upwards one is pushed away gently as automatic part, thus finishing smoothly of can guaranteeing to move.

Claims (2)

1, a kind of motor is derived from moving drop switch, comprise support bushing, upper and lower static contact, moving contact are formed, it is characterized in that motor is arranged in the support bushing links to each other with the reducing gear of bottom through insulation power transmission rod, reducing gear links to each other with driving lever with storage power spring through force transmiting disk, and driving lever links to each other with moving contact through operating conversion equipment manually, automatically.

2, motor according to claim 1 is derived from moving drop switch, it is characterized in that worm gear, worm screw or gear spiral transmission speed reducer set up in down fixed contact and the first end of movable contact.

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