UA76018C2 - Movable unit of a switch with additional disconnecting contacts for switchgear - Google Patents

Abstract

The invention relates to a withdrawable unit (1) for a switch device comprising an actuating device (16) for auxiliary disconnector contacts (8). A slider (15) provided with a contact unit (14) can be displaced by means of a linking arrangement (31), which comprises a linking body (32) with a spiral thread (40), wherein a control pin (36) of a shaft (34) engages. A section (40) of the spiral thread (33) is embodied with a minor pitch and enables the closure of the auxiliary disconnector contacts (8) whilst expending a minimal amount of energy when actuating the shaft (34).

Description

Description of the invention

The invention relates to a retractable instrument panel for a switchgear with auxiliary plug-in 2 contacts, made with the possibility of closing or opening with the help of a control device located on the retractable instrument panel and accessible on the front control panel, and on the retractable instrument panel with the help of a slide with the possibility of movement installed contact block corresponding to the auxiliary plug-in contacts.

A retractable instrument panel of this type is known, for example, from OE 199 48 697 AT). At the same time, the contact block 70 is located on the back side of the retractable instrument panel and can be operated using a handle (a round handle or the like) provided on the front panel of the retractable instrument panel control. The handle is placed on the shutter, which is provided as a means of directing the contact block with the possibility of rectilinear movement. Therefore, the handle protrudes slightly from the front control panel if the auxiliary plug contacts are not connected. 12 For the main disconnecting contacts in the retractable instrument panel (according to OE 27 17 691 AT) it is already known to use a worm drive, which can be actuated using a tool on the front panel of the retractable instrument panel. At the same time, with the help of a worm, the gate is moved, on which the contact blocks of the main removable contacts are located near the rear side of the retractable instrument panel. In the same well-known retractable instrument block, auxiliary disconnecting contacts are placed, which, when the retractable instrument block is inserted into the corresponding distribution device, are forcibly engaged with each other. These auxiliary disconnectors become effective only when the worm drive of the main disconnectors is actuated, because an auxiliary switch is connected to it, which disconnects the auxiliary voltage to actuate the contactors, etc.

In the older (patent application OE 101 20 737.9 dated 20.04.2001) another retractable instrument unit is described with the indication that the auxiliary removable contacts can be controlled using a worm or screw drive in a similar way (OE 27 17 691 AT).

The invention is based on the task of improving the control of auxiliary disconnecting contacts in retractable instrument units. For this purpose, it is provided that the control device includes a shaft installed with the possibility of rotation in the retractable instrument block and controlled by means of a tool, and a rocker device is placed on the slide, which interacts with the control pin radially protruding from the shaft. "-

With the same functional purpose as in the worm device according to (OE 27 17 691 AT, the control device according to the invention can be manufactured and mounted more easily. In particular, the combination of the rocker o device with the gate valve of the contact block allows you to perform both parts (the gate valve and the rocker device ) in Ge) in the form of one sheet part. However, if there is a need to transmit large forces, for example in the case of multi-pole auxiliary disconnecting contacts, then the movement process according to the invention can be achieved due to the fact that the rocker device has a helical worm line course with at least two segments with different inclinations, with which one segment in relation to the rotation of the shaft has an increased transmission of forces, suitable for closing auxiliary disconnecting contacts. At the same time, the other segment can be calculated so that the idle "stroke of the contact block from its rest position to the first contact contact with the stationary part of the auxiliary Z 50 removable contacts corresponds to a small angle of rotation of the shaft. c A rocking device with this property is preferably made in such a way that two rigidly connected iz are provided

With" gate valve, made in the form of a hollow cylinder and placed relative to the shaft, coaxially spherical elements, the end surfaces of which are turned to each other, limit the course of the helical line of the worm, which receives the control pin. Separate rocker elements compared to an interdependent rocker body can be manufactured much easier and allow with lower costs to realize the desired dependence of the control path or, respectively, the angle of rotation on the applied force.

Ge") Another preferred, and due to the axially divided rocker device, easily realized form of execution can be that the course of the helical line of the worm at least at one end has a section with the opposite inclination and that the spring that creates the pretension of the rocker device fixes shaft in final position. - 70 As it was already mentioned in the introductory part, the possibility of simple manufacturing and easy installation of the system of auxiliary removable contacts are among the objectives of the invention. This can be achieved due to the fact that the spherical elements have, respectively, a radially protruding flange, and the gate, which is connected to the flanges, carries the shelf. At the same time, due to the selection of the dimensions of the bearing shelf and the flange, the distance between rocker elements, necessary for the engagement of the control pin, is set. At the same time, the flange and the supporting shelf are placed 29 parallel to each other and are connected coaxially and without turning by means of a solid fastener

GF) means.

As you know, the shaft can have a contour on the end side for connection with the tool. At the same time, both removable tools in the form of a well-known crank handle and tools that are permanently connected to the shaft, for example, a rotary round handle, are used to activate the shaft. because the invention is explained in more detail below, with the help of Fig. execution example.

Fig. 1 shows a retractable instrument block for a low-voltage switchgear with a control device for auxiliary disconnecting contacts in a top view.

Fig. 2 shows, as a first example, a gate control device with a rocking device placed on it in connection with a shaft provided for controlling the gate. because Fig. 3 shows the following example of the control device of the auxiliary detachable contacts in the assembled state together with the shutter as a carrier of the movable contact block of the auxiliary detachable contacts.

Fig. 4 shows the main components of the control device according to Fig. 3 in a perspective exploded view.

Figure 5 shows the right front corner of the retractable instrument unit according to Figure 1 in a perspective view, and the control device of the auxiliary disconnecting contacts according to Figures 3 and 4 is in the "Auxiliary disconnecting contacts open" position.

Fig. b shows the corresponding Fig. 5 representation, and the control device is in the position "Auxiliary disconnecting contacts closed". 70 Presented in Fig. 1 in a top view, the retractable instrument unit 1 for a low-voltage distribution device contains a frame or, accordingly, a body 2, on the front side of which there are a front service panel C with handles 4 and 5 and on its back side the main disconnecting contacts b and 7, as well as auxiliary disconnecting contacts 8. At the same time, the main disconnecting contacts 6 are designed to supply energy, while the main disconnecting contacts 7 are designed to transfer energy to the consumer. Main removable contacts 6 7/5. 17 in a known manner are brought into engagement with the fixed busbars of the distribution device chambers or, accordingly, with the opposite contact parts 10 and 11 due to the movement of the retractable instrument unit 1 in the direction of the arrow 12 and separated from them due to the movement in the direction of the arrow 13. To the auxiliary connectors contacts 8 include the contact block 14, which is fixed at the rear end of the gate 15, with the possibility of rectilinear movement installed in the frame 2. The gate 15 can also be moved in the direction of arrows 12 and 13 due to the control device 16 or, accordingly, 19, which will be explained in more detail further.

In addition, the retractable instrument unit 1 has a support plate 17 for switching, control and protection equipment parallel to the front panel of service C. Of these, only the main switch 18 is indicated, which is actuated by means of a rotary knob 20, which is located on the front service panel 3. Further, the retractable instrument unit 1 contains a blocking beam 21, which is located mainly along the entire width of the frame 2, with this blocking beam 21 with the help of rotary levers 22 and 23 is installed with the possibility of rotation in the side walls of the frame 2 and which has protruding above the frame 2 locking noses 24 and 25, which interact with not i) shown in the drawing fixed positional pulleys. They serve mainly to fix the retractable instrument unit 1, in particular, in the "unlocked" (dissupposed) and "work" (supposed) positions and at the same time provide the necessary fixations with respect to the main switch 18 and, if necessary, with respect to the movement drive . A threaded spindle 26 with a crank handle 27, inserted if necessary, as components of such a drive is also shown in Fig.1. A tool 28, which can be made similar to (7) the crank handle 27 or in the form of a key, is shown as a means for actuating the control devices 16 or, respectively, 19.

Based on Fig. first, the first example of the implementation of the control device for auxiliary ise) detachable contacts is explained 8. i-

Fig. 2 is a schematic perspective view without guide and support parts of the housing 2 (Fig. 1). With the cliff in fig. a gate 30 is shown, which is equipped with a rocking device 31. The rocking device 31 contains a rocking element 32 made in the form of a sheet part, which has a helical line of a worm 33. At the same time, the rocking element 32 can form with the rocking gate 30 one single stamped part, in which in a flat state "by stamping, the course of the helical line of the worm 33 is introduced in the form of a slot. Finally, the rocker element with c 32 is formed by bending in the form of the shown open or closed cylindrical configuration aligned with the shaft 34. The same advantage of the possibility of simple manufacturing of the course of the helical line of the worm 33 is achieved, ;" if the rocker element 32 is made as a separate part and is properly connected to the gate valve 30. In this case, the formation of the empty cylinder to the given configuration can be carried out both before and after the connection with the gate valve 30. In Fig. 2, the shaft 34 is shown remote from rocker device 31 so as to cover rocker element 32 less.

The dotted line 35 shows that the radially protruding control pin 36 is located in the shaft 34

Me, provided for entering the course of the helical line of the worm 33. In its assembled state, the shaft is installed with the possibility of rotation (for example, in the front service panel C in Fig. 1) and is secured from axial displacement. From the end side, the shaft 34 is equipped with a contour 37, which is presented as a four-sided projection. With the help of a tool aligned with the contour 37 (see tool 28 in Fig. 1), the shaft 34 can rotate in accordance with the arrow 38 and due to this move the shutter 30 in accordance with the arrow 39.

Figure 2 shows that the course of the helical line of the worm 33 has two segments 40 and 41, the slope of which is different. Such an implementation causes the fact that with the same angle of rotation of the shaft 34, different paths of the gate valve 30 are obtained, if the control pin 36 is located on the segment 40 or the segment 41. In this way, when closing the auxiliary disconnecting contacts 8, a quick feed to contact formation and then a relatively small driving force are ensured (F, the force on the tool for the shaft 34, despite the large need for force to engage the contact links. ka Another example of execution for the control device 19 is explained further on the basis of Fig. 3 and 4. At the same time, the control device 19 in Fig. 3 is shown in in the assembled state and in Fig. 4 in a perspective disassembled state. in Fig. 3 shows, similarly to Fig. 2, the gate valve 42, which is equipped with a rocker device 43. It contains a shaft 44, which with the help of a control pin 45 is engaged with the course of the helical line of the worm which 46. From the end side, the shaft 44 is equipped with a front edge 47, which has a window 48 for observing the inscriptions of the front panel of service (Z in Fig. 1), as well as an opening for access to about contour 49 of shaft 44.

The rocking device 43 according to Fig. 4 contains two rocking elements 50 and 51, the end sides 52 or, respectively, 53 of which are turned to each other 65 and which form the course of the helical line of the Worm 46. The necessary distance for this is achieved with the help of flanges 54 and 55 , which are radially distant from rocker elements 50 and 51 and are equipped with through holes 56 for connection and fastening. To ensure simple installation without adjustment, the flange 55 is equipped with two prismatic trunnions protruding in the direction of the flange 54, for receiving which the flange 54 has notches 58. In the end surface of the rocker element 51, which forms the wall of the course of the helical line of the worm 46, there is a ledge 59, in which, under the influence of the axially acting spring 60, can enter the control pin 45 hidden in Fig. 4 (Fig. 3). This arrangement provides fixation at the end of the helical line of the worm 46. By design, the same recess can be located at the opposite end of the helical line of the worm (not shown in Fig. 4).

To connect the rocker device 43 with the shutter 42, the latter is equipped with a supporting shelf 61. The facing 7/o edge 47 is equipped with a tubular nozzle 62, which is coordinated with the cylindrical ledge 63 of the shaft 44 and is connected to it by a pin 64. The shutter 42 (Fig. 3 ) at its rear end is equipped with a bent mounting shelf 65 for receiving the contact block 14.

Figures 5 and 6 show the control device already explained on the basis of Figures 3 and 4 in the mounted state together with the front right corner of the retractable instrument unit 1 according to Figure 1. 15 Fig. 5 and b illustrate, along with the parts already explained on the basis of Fig. 1, in particular, the front service panel C and the blocking beam 21, the side wall 66 with a through window 67 for the locking nozzle 25, as well as the auxiliary switch 68, which is placed on the supporting shelf 61 of the shutter 42. At the same time, the control device is located in Fig. 5 in the position of open auxiliary disconnecting contacts. This can be understood from the fact that the rocker device 43 is shifted completely forward and the auxiliary switch 68 with its switching lever 69 2o is adjacent to the inner side of the front panel of service C or to a special stop. The observation window 48 of the facing border 47 is placed on the side on the right above the corresponding inscription of the front panel of service 3.

Due to the rotation of the shaft 44 to the right by approximately 2702, the rocker device with the shutter 42 moves down to bring the contact block 14 (Fig. 1) into engagement with the fixed contact block 70. The switching lever c 25 59 of the auxiliary switch 68 at the same time moves away from its stop and signals a changed switching position.

Both Fig. 5 and b illustrate two segments 71 and 72 of the course of the helical line of the Worm with different inclinations. When the auxiliary disconnecting contacts are closed, a segment 71 with a large slope is first passed. At the same time, an idle stroke is carried out in order to bring the movable contact block closer from the opening position to the stationary contact block 70. The second segment 72 of the course of the helical line of the worm 46 has a smaller slope and due to this s 30 with the same rotation of the shaft 44, as a result, we get less movement rocker device 43, which corresponds to a stronger transmission of force. Along the segment 72, the contact blocks 14 and 70 are engaged with each other. -

Ball elements 50 and 51 are expediently manufactured in the form of profiled metal or plastic parts by injection molding. At the same time, the surfaces on which the course of the helical line of the worm 46 is received after their connection are formed with all the necessary features through the walls of the mold for casting under pressure or, and at 35 in this way castings or parts are obtained without further processing. what

As a tool for maintaining the shaft (34 in Fig. 2, 44 in Fig. 3-6), the well-known crank handle 28 (Fig. 1) has already been mentioned. If necessary, it can be mounted on the contour on the end side of the shaft (31 on

Fig. 2, 49 in Fig. 3) and has a counter part formed in a certain way for this purpose. If the withdrawable instrument unit 1 is to be serviced frequently, it may be advantageous if the auxiliary plug-in contacts can be serviced directly. This can be achieved by using a tool in the form of a rotating round handle instead of a crank handle 8 s, as shown in Fig.1. At the same time, the connection of this rotating round handle with the shaft of the control device is also made with the help of a suitable circuit. In "» case, if removal is not provided or desired, the rotary round handle can be fixed by other suitable means, such as cotter pin, pin or the like. 45 List of items -I 1 retractable instrument unit 2 frame b Z front service panel o 4 handle 50 5 handle - 6 main disconnecting contact (power supply) with 7 main disconnecting contact (output) 8 auxiliary disconnecting contacts of the camera bus 55 11 opposite contact-part 12 arrow for moving the retractable instrument unit when inserting (if) 13 arrow for moving the retractable instrument unit 1 - when pushing out 14 contact block of the sliding door 16 control device (Fig. 2) 17 support board 18 main switch 19 control device (Fig. 3, 4, 5, 6) rotary handle 65 21 locking beam 22 rotary lever on the locking beam

23 rotary lever on the blocking beam 24 locking nozzle 25 locking nozzle 26 threaded spindle 27 crank handle 28 tool for the control device 16 29 control device (Fig. 2)

ЗО shaft (Fig. 2) 70 31 rocker device 32 rocker element (sheet part) 33 course of the helical line of the worm 34 shaft 35 dashed line 36 control pin 37 contour on the end face of the shaft 34 38 arrow for shaft rotation 34 39 arrow for shifting gate valve 30 40 segment of the helical line of the worm 33 (small slope) 41 segment of the helical line of the worm 33 (large slope) 42 gate valve (Fig. 3) 43 rocker device 44 shaft 45 control pin c 46 stroke of the helical line of the worm which 47 facing edge i) 48 window for observation in the front maintenance panel 49 contour on the end face of the shaft 44 50 (front) rocker element so zo 51 (rear) rocker element 52 end surface of the rocker element 50 -- 53 end surface of the rocker element 51 o 54 flange on rocker element 50 55 flange on rocker element 51 ise) 56 mounting hole in the flange 54 th- or, respectively, 55 57 centering pin, on the flange 55 58 receiving hole in the flange 54 59 ledge in the end surface 53 « 60 screw spring and from page 61, the supporting shelf on the shutter 42. 62 nozzle on the facing edge 47 and? 63 shaft shoulder 44 64 connecting pin 65 mounting shelf on the sliding door 42 -I 66 side wall on the retractable instrument unit 1 67 through window in the side wall 66 me) 68 auxiliary switch o 69 switching lever 70 contact block (fixed) - 71 segment of the spiral line of the worm 46 (small slope) s 72 segment of the spiral line of the worm 46 (large slope) 73 tool (rotating round handle)

Claims (1)

The formula of the invention F) GI 1. A retractable instrument unit (1) for a distribution device with auxiliary disconnecting contacts (8), made with the possibility of closing or opening with the help of the control located on the retractable instrument unit (1) and accessible on the front control panel (3) of the control device (16, 19), and the contact block (14) corresponding to the auxiliary removable contacts (8) is installed on the retractable instrument block (1) with the help of a gate valve (15, 30, 42) with the possibility of movement, which differs in that the control device (16, 19) contains a shaft (34, 42) installed with the possibility of rotation in the retractable instrument block (1) and actuated by a tool (28, 73), as well as the fact that a rocker is placed on the shutter (15, 30, 42) the device (31, 65 43), designed to interact with the control pin (36, 45) radially protruding from the shaft (34, 44). 2. Retractable instrument unit according to item 71, which differs in that the rocker device (31, 43) ensures the movement of the helical line of the Worm (40, 46) with at least two segments (40, 41; 71, 72) with different inclinations, of which one segment (40, 72) has an inclination that, when rotating the shaft (34, 44) provides the transmission of increased force sufficient to close auxiliary disconnecting contacts (8). C. Retractable instrument unit according to item 1 or 2, which is characterized by the fact that the rocking device (43) is formed by two rocking elements (50) rigidly connected to the gate (42), made in the form of a hollow cylinder and placed coaxially with respect to the shaft (44) , 51), facing each other end surfaces (52, 53) which limit the course of the helical line (46) of the worm, which receives the control pin (45). 4. Retractable instrument unit according to item 2 or C, which is characterized in that the course of the helical line (46) of the worm at least at one end has a segment (59) with an opposite slope, and also in that the spring (60) of the previous tension of the rocker device (43) ensures fixation of the shaft (44) in the final position. 5. Retractable instrument unit according to any of items 2-4, which is characterized in that each of the rocker elements (50, 51) has a radially protruding flange (54, 55), and the shutter (42) has a supporting shelf (61) , which is to be connected to the flanges (54, 55). 6. Retractable instrument unit according to item 5, which is characterized by the fact that the flanges (54, 55) of rocker elements (50, 51) and the supporting shelf (61) of the shutter (42) are placed parallel and connected flush and without scrolling by means of through connecting fasteners. 7. A retractable instrument unit according to any of the previous items, characterized in that the shaft (34; 44) has a contour (37, 49) on the end face, suitable for connection with the tool (32). 8. A retractable instrument unit according to any of the previous items, which is characterized by the fact that the tool (73) has the form of a rotary round handle, made with the possibility of long-term interaction with the shaft (34, 44). c (8) c «- «c) (Se) m. - with . and? -I (22) («c) - 50 IR e) F) ime) 60 b5