SU1753503A1 - Drive of high-voltage switch - Google Patents

Abstract

SUMMARY OF THE INVENTION: The mechanical indicator of drive readiness for a switch-on operation is made in the form of a two-arm swivel lever, one KBtz to the switch. This is an indicator of the drive ready state for the switch-on operation, and the other performs the function of a switch for the remote shutdown operation switch. 5 il.

Description

The invention relates to high-voltage instrumentation, in particular to spring drives of high-voltage switch-disconnectors.

Known spring drive for load switches both foreign firms and domestic.

The disadvantages of these drives are the metal intensity due to the large number of components and parts included in the design, the complexity of the design, the high specific pressures on the levers of the locking devices, the console for positioning the locking mechanisms, and the low energy intensity of the operating springs. These deficiencies are the reason for the rapid deterioration of the seats in the assemblies, which results in low reliability and durability of individual assemblies and drives in general.

Known spring drives to load switches for installation in complete switchgears.

(KRU), stationary service chambers (CSR).

The main disadvantages of these spring drives are the complexity of the design, the need to use high quality materials and to ensure high accuracy and cleanliness of machining the main parts of the drives.

The aim of the invention is the creation of a spring drive to the load switches for installation in the switchgear, CSR, as well as complete pressure transformer substations (KTP), increasing the reliability and durability of the drive as a whole.

To achieve this goal, in the proposed device comprising a rigid welded structure frame, the mechanical indicator of drive readiness for the start-up operation is made in the form of a two-arm rotary lever, one end of which is an indicator of the drive ready state for the start-up operation and the other performs the function of the additional switch

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when the remote shut-off operation contacts are inserted, and the double-arm lever of the locking mechanism is provided with a tooth at one end for engaging an additional lever rigidly fixed to the cam axis of the cam mechanism with the counter tooth, and the other end of the double-arm lever of the locking mechanism abuts against the specified adjustable stop, mounted on an additionally inserted curvilinear stationary lever connected to a remotely operated solenoid mounted on an axis of a two-armed lever ha of the locking mechanism.

Fig. 1 shows a kinematic diagram of the coupling of a drive with a switch; figure 2 - drive, front view; on fig.Z - section aa in figure 2; figure 4 - section bb in fig 2; figure 5 - the mechanism of the locking device, side view.

Actuator 1 is coupled to switch 2 according to the kinematic scheme, depending on their installation in switchgear, KCQ or KTP. Through the housing 3 of the actuator 1 (Fig. 2), a panel of 4 manual control buttons, viewing windows for visual observation of the position of the switch and the actuator are visible. An earthing bolt 5 is installed in the drive housing.

In an actuator containing a welded frame 6 of a rigid construction (FIG. 3), an activating fist 7 is installed, rigidly connected to the crankshaft element, including levers 8, a locking mechanism 9 to hold the switch in the on position, a shutdown electromagnet 10, a manual disconnect lever 11, manual shutdown button 12. The mechanical indicator of the position of the switch 13 (on or off switch), the electric block contacts of the 14 position of the switch and the locking mechanism 15 on.

A crankshaft gear cage 16 is installed in the drive (FIG. 4), on which the spring holder 17c is mounted with a pressure roller 18 and energy carrier 19 in the form of two tension springs fixed in the upper part of the drive frame, a manual winding knob 20, a manual actuation button 21, the bracket of which is installed the terminal row element 22, as well as the lever of the locking mechanism 23 (anti-reversing switch), the lever 24 of the locking mechanism for switching on, the switching electromagnet 25 connected by electric wires 26 from the blocking contact the pointer 27 of the position of the drive and the mechanical pointer 28 readiness of the drive with the words Ready

and Not ready and padded to its original position by the spring 29.

The locking device for switching on (figure 5) consists of a two-armed lever 30, the upper part of which interacts with an adjustable stop 31, and the lower part with a tooth of the lever 32 of a crankshaft with elements of a fist, crown gear, interconnected by an axis

the spring holder of the energy carrier 19 (FIG. 4) in accordance with the established adjustable size K. (FIG. 5) prior to tensioning the operating springs. The elements of the sanophoro device also include the ha 33 of the enable button 21 (Fig. 1) and the double-arm lever 24 (also known as 34, 5), which in the upper part is connected with the thrust 33, and in the lower part - with the lever 35 curvilinear profile of the locking mechanism,

planted on the common with the lever 30 axis 36, and at the same time springed by the tension spring 37

Drive high voltage switch operates as follows.

In order to turn on the switch, it is necessary to use a manual winding knob 20 (Fig. 4) to oscillate, through the crown, act on the Gear Shaft gear, extend energy carrier 19 to the bottom dead position. When e, the holding lever 32 (Fig. 5) is held by its tooth by the tooth of the lever 30 of the locking mechanism mechanism HJJ inclusion. With

At the same time, the rocket 18 (Fig. 4) of the bottom block of the spring holder rolls onto the transverse bar of the mechanical indicator 28, stretches the return spring 29, and in the window of the drive casing exposes the lettering: Drive Ready or Not Ready for the start operation. At the same time, with its upper part, freeing the auxiliary contact 27, it prepares an electrical circuit of the electromagnet 10 for subsequent remote disconnection.

The process of switching on the switch is carried out by pressing the button 21 of the manual activation (figure 4) or by the electromagnet 25 of the remote activation of the third 33 (figure 5)

or directly on a two-armed lever bar 34, if turned on by an electromagnet. The lever 34, being articulated with the lever 35 of the curvilinear profile, rotates the latter around the axis 36 and

the adjustable stop bar 31, acting on the lever 30, removes the tooth from the toothing of the tooth of the crankshaft lever 32. The energy of the operating springs 19 thus released through the fist 7 of the crankshaft activating mechanism is transferred to the roller of the activating levers 8 (FIG. 3) and the tight coupling of the drive with a switch transmits this energy to turn on the switch (f.ig.1).

In the on position, the switch is held by the locking mechanism 9. The switch is turned off by the manual off button 12 (Fig. 3) or the opening electromagnet 10, acting on the lever 11, which, in turn, affects the leverage system of the mechanism 9, and the levers 8 with the energy of the switching springs of the switch to the initial position. At the same time, the lever of the mechanical indicator of the position of the switch 13 is turned, indicating that the switch is turned off, and the auxiliary contacts 14 are preparing the circuit for switching off the electromagnet 10 for a subsequent switching on operation.

The drive allows one turn on and one turn off of the switch, after which it is necessary to re-accumulate the energy of the working springs using the manual winding knob 20 (Fig. 4).

The proposed drive has a number of advantages over drives designed for this class of load break switches. These should include the range of regulation of the accumulated energy by changing the size K (Fig. 5) of preloading working springs. The drive uses a drive readiness indicator and a locking mechanism for switching on, reliable in operation and simple to manufacture. The drive also provides for the presence of a locking lever against the possible re-activation of the switch when the earthing switch is on. From the possible resetting of the working springs and

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Breaking the drive in this way provides for a bald portion on the crown gear.

High operating parameters and technical and economic indicators will lead to a significant economic effect in the national economy.

Claims (1)

The invention includes a high-voltage switch actuator containing a remote-start electromagnet with a pull, a spring-loaded energy carrier with a cam-charging mechanism, a mechanical indicator of drive readiness for the switching operation, a locking switch-on mechanism containing a double-arm lever mounted for rotation on an axis, and an adjustment stop, characterized by that, in order to increase reliability and durability, the mechanical indicator of drive readiness for the switch-on operation is made in the form of a two-sided turn The first lever, one end of which is an indicator of the drive ready state for the switch-on operation, and the other performs the function of a switch for the additionally entered block contacts for the remote shut-off operation, and the double-arm lock lever is equipped with a tooth at one end with the counter-tooth of an additional inserted lever rigidly fixed on the axis of the cam cam mechanism, and the other end of the two-arm lever of the locking mechanism abuts against the specified adjustable stop, nny n and additionally introduced curvilinear movable arm, communication-bonded with a draft type electromagnet remote incorporation mounted on the two-armed lever axis of the lock mechanism. AT CD / h Switch sh (tl with i /// SHY frC, Fa / 2  -BUT /five Shigz 9 5 eosesit B gpf 32 s 33