CN208142677U - Packaged type line leading device - Google Patents

Abstract

The utility model discloses a movable line inlet device, which belongs to the field of low-voltage power distribution and control. The utility model includes a contact and an incoming line housing. The contact includes two contact pieces, which are symmetrically arranged around the fixed pin as the center, forming a first open end for plugging in with a vertical copper bar at one end, and a first open end at the other end. At the second open end that is plugged into the terminal block, the two contact pieces can be clamped openly and closed by the elastic clamping device, and there are relative protrusions on the inner side of the contact piece close to the first open end, so that the plug-in end forms a predetermined shape. The insertion opening; the contact is arranged in the wire inlet housing, and the wire inlet housing is provided with a pre-tensioning mechanism that can be inserted into the pre-insertion opening to pre-expand the first opening end. It is connected to the vertical copper bar of the drawer without the overall movement of the drawer. When the contact is plugged into the vertical copper bar of the drawer, the contact is not worn, the energy loss and failure rate are reduced, and the service life and reliability of the device are improved.

Description

Movable wire entry device

technical field

The invention belongs to the field of low-voltage power distribution and control, and in particular relates to a movable line inlet device.

Background technique

In the field of low-voltage power distribution and control, the drawer-type switchgear is a large-scale and wide-ranging equipment, and the quality of the main circuit connector of the switchgear plays a decisive role in the safe and reliable operation of the switchgear, and the main circuit connector Whether the contact pressure of the contact is sufficient is an important indicator of the quality of the connector. It determines whether the drawer can withstand the impact of the starting current of the motor when it is running, and whether the temperature rise is too high when it is running at full load.

The function of the contact unit of the incoming line device is to electrically connect the withdrawable components in the low-voltage withdrawable switchgear to the conductive busbar. The electric contact (referred to as the contact) is the executive element of various switching appliances, which is responsible for the opening and closing of the circuit. The function of the contact, the quality of the contact work is directly related to the working performance and reliability of the electrical appliance. Especially for electrical systems containing a large number of contacts and contacts, the reliability of contacts and contacts has a more prominent impact on the reliability of the entire system. In addition to the two static working states of the contact, the contact transitions from closed to open or from open to closed, and there is also a transition state, that is, the opening and closing process of the contact is also the movement process of the contact. .

In the prior art, the line inlet device and the drawer of the low-voltage cabinet move simultaneously. The drawer of the low-voltage cabinet is closed, and the contacts of the contact unit in the incoming line device are directly plugged into the busbar, which will easily cause contact wear. When the drawer is running and passing current, the temperature rise between the contacts and the busbar is relatively high, causing corresponding electrical loss.

Contents of the invention

The object of the present invention is to provide a movable wire inlet device which can avoid contact wear.

Specifically, the present invention is realized by adopting the following technical solutions: including a contact and an incoming line housing, the contact includes two contact pieces, and the two contact pieces are arranged symmetrically around the fixed pin, forming one end for contact with the vertical copper The first open end of the row is plugged in, and the other end is connected to the second open end of the terminal block. The two contact pieces are clamped openably and closed by the elastic clamping device, and the inner side of the contact piece near the first open end has a relative The provided protrusion makes the plug end form a pre-plug opening;

The contacts are arranged in the wire-entry housing, and the wire-entry housing is provided with a pre-tensioning mechanism that can be inserted into the pre-insertion opening to pre-expand the first opening end.

It can be understood that when the contacts are plugged into the terminal block, the terminal block can be arranged vertically, and the terminal block can be arranged horizontally.

Furthermore, the pre-tensioning mechanism is an insert type pre-tensioning rib fixed in the wire-entry housing and matched with the pre-inserting opening.

It can be understood that the opening spacing of the pre-insertion opening is smaller than the pre-tensioning ribs, and the contacts slide. When they do not touch the vertical copper bars of the drawer cabinet, the contacts are separated to both sides by the pre-tensioning ribs of the pre-tensioning mechanism in the incoming line housing. , so that the contact piece and the vertical copper bar finally make frictionless contact. The pre-tensioned ribs are of plug-in structure, which is convenient for dismantling the incoming line housing and convenient for later maintenance.

Further, the elastic clamping device includes a fixing frame and an elastic sheet, a first post is provided on the outside of the contact sheet close to the first opening end, a second post is provided on the outside of the contact sheet near the second open end, and the elastic sheet abuts against the Between the first boss and the second boss, and clamped by the fixing frame.

Furthermore, the contacts are fixed between two sets of slides, and multiple sets of slides are overlapped and combined to form a slide block.

It can be understood that the upper and lower sides of the sliders are respectively provided with corresponding concave and convex grooves, the groove surface of the first group of sliders and the convex groove surface of the second group of sliders are engaged with each other, multiple groups of sliders can be overlapped and combined, and can be disassembled The sliding block combination can be combined in different numbers according to the specific power supply requirements.

Furthermore, a guide rail is provided inside the wire-entry housing, and the slider is plugged into the wire-entry housing along the guide rail.

It can be understood that the detachable incoming line housing makes the later maintenance of the equipment more convenient.

Furthermore, a cooling hole is provided above the wire inlet housing.

It can be understood that the heat dissipation holes ensure timely heat dissipation when the contact contacts and the terminal block are in contact with each other.

Furthermore, a connection is provided on the outer surface of the wire inlet housing.

Furthermore, the connection is a plug-in device.

It can be understood that multiple incoming line housings can be clamped according to specific requirements, and combined into a multi-level incoming line device such as two poles, three poles, or four poles.

Furthermore, a through hole is provided at the bottom of the side where the incoming line housing and the terminal block are plugged in. After the pressure plate passes through the through hole, it is fixed on the drawer cabinet by the left and right ear fixing devices of the drawer cabinet.

It can be understood that the wire inlet housing is fixed on the drawer cabinet through the pressure plate and the left and right ear fixing devices to prevent the wire inlet device from moving.

Furthermore, a boss is provided on the top of the side where the incoming line housing and the vertical copper bar are plugged in, and the fixing bar is provided with a fixing hole adapted to the boss, and the fixing bar is pressed above the boss so as to prevent the entry housing from moving.

The beneficial effects of the present invention are as follows: the movable wire inlet device of the present invention can be connected with the vertical copper bar of the drawer cabinet without the overall movement of the drawer cabinet, and ensures that the contacts are not worn when the contacts are plugged into the vertical copper bar of the drawer cabinet. Reduce energy loss and failure rate, improve device life and reliability.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention in a state where the terminal block is placed horizontally.

Fig. 2 is a schematic diagram of the overall structure of the present invention in a vertical state of the terminal block.

Fig. 3 is a top view of the overall structure of the present invention.

Fig. 4 is a left view of the overall structure of the present invention.

Fig. 5 is a schematic diagram of the structure of the insert type pretensioning tendon of the present invention

Fig. 6 is a schematic structural diagram of the contact of the present invention.

Fig. 7 is a schematic diagram of the structure of the contactor and the slider of the present invention.

Fig. 8 is a schematic structural view of the slider of the present invention.

Fig. 9 is a schematic structural view of the pressing plate of the present invention.

Fig. 10 is a schematic structural diagram of a four-stage line inlet device of the present invention.

Fig. 11 is a schematic diagram of the unconnected state of the present invention.

Fig. 12 is a schematic diagram of the connection state of the present invention.

Labels in the figure: 1-contact, 2-incoming wire housing, 3-contact piece, 4-fixing pin, 5-terminal block, 6-pre-plugging opening, 7-pretensioning rib, 8-fixing frame , 9-Elastic piece, 10-First post, 11-Second post, 12-Slider, 13-Slider, 14-Heat dissipation hole, 15-Connection, 16-Through hole, 17-Press plate, 18 -boss, 19-fixing bar, 20, vertical copper row.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

Embodiment 1: An embodiment of the present invention, as shown in FIG. 1, FIG. 2, FIG. 3 and FIG. The two contact pieces 3 are arranged symmetrically around the fixing pin 4 , forming a first open end where one end is plugged into the vertical copper bar 20 , and a second open end where the other end is plugged into the terminal block 5 . When the contacts are plugged into the connecting terminal row 5, the connecting terminal row 5 can be arranged vertically as shown in FIG. 2 , and the connecting terminal row 5 can also be arranged horizontally as shown in FIG. 1 .

The two pieces of contact pieces 3 are clamped openably and closably by an elastic clamping device, and the inner side of the contact pieces 3 close to the first opening end has opposite protrusions, so that the insertion end forms a pre-mating opening 6 .

The contact 1 is disposed in the wire-entry housing 2, and the wire-entry housing 2 is provided with a pre-tensioning mechanism that can be inserted into the pre-insertion opening 6 to pre-expand the first opening end.

The pre-tensioning mechanism is an insert-type pre-tensioning rib 7 fixed in the wire-entry housing 2 and matched with the pre-insertion opening 6 as shown in FIG. 5 . The opening spacing of the pre-insertion opening is smaller than the pre-tensioning ribs, and the contacts slide. When not touching the vertical copper bars of the drawer cabinet, the contact pieces are separated to both sides by the pre-tensioning ribs of the pre-tensioning mechanism in the incoming line housing, so that the contact pieces Ultimate friction-free contact with vertical copper bars. The pre-tensioned ribs are of plug-in structure, which is convenient for dismantling the incoming line housing and convenient for later maintenance.

It should be noted that the contact mode between the contactor and the pretensioning device in the present invention is not limited to the exemplified sliding contact mode in the above embodiments, and other contact modes can also be used, as long as the purpose of the present invention can be achieved. For example, the contacts can also be mated in rolling friction. When the rolling plug-in structure is adopted: the pretensioning device can be set as a rolling pretensioning device with rolling parts such as balls or rollers; the protruding part of the contact can also be set as a rolling part with rolling parts such as balls or rollers. scroll structure. The rolling plug-in structure enables the pre-tensioning device and the contact to be plugged in the way of rolling friction, which can effectively reduce the friction of the plug-in parts and reduce the wear on the contact, thereby improving the service life of the product.

As shown in Figure 6, the elastic clamping device includes a fixed frame 8 and an elastic piece 9, a first boss 10 is arranged on the outside of the contact piece 3 near the first open end, and a first boss 10 is arranged on the outside of the contact piece 3 near the second open end. A second protruding post 11 is arranged on the outside, and the elastic piece 9 abuts between the first protruding post 10 and the second protruding post 11 , and is clamped by the fixing frame 8 .

As shown in FIG. 7 and FIG. 8 , the contact 1 is fixed between two sets of sliding pieces 12 , and multiple sets of sliding pieces 12 overlap each other to form a sliding block 13 . The upper and lower sides of the sliding sheets 12 are respectively provided with corresponding concave-convex grooves, the groove surfaces of the first group of sliding sheets and the convex groove surfaces of the second group of sliding sheets engage with each other, and multiple groups of sliding sheets 12 can be overlapped and combined. The combination of detachable sliders 13 can be combined in different numbers according to specific power supply requirements.

The inner side of the incoming line housing 2 is provided with guide rails, and the slider 13 is plugged into the incoming line housing 2 along the guide rails. The detachable incoming line housing makes the later maintenance of the equipment more convenient.

The heat dissipation holes 14 as shown in Fig. 1 and Fig. 2 are arranged on the top of the wire-entry housing 2, which ensures timely heat dissipation when the contacts rub against the terminal row.

As shown in FIG. 1 and FIG. 2 , a connection 15 is provided on the outer surface of the wire inlet housing 2 . The connection 15 is a plug-in device. Multiple incoming line housings can be snapped together according to specific requirements, and combined into a two-pole, three-pole, or four-pole multi-level line-in device. Figure 10 shows the structure of a four-level line-in device.

A through hole 16 as shown in Figure 1 and Figure 2 is provided at the bottom of the insertion side of the incoming line housing 2 and the terminal block 5. After the pressure plate 17 passes through the through hole 16, it passes through the left and right ears of the drawer cabinet. The fixing device is fixed on the chest of drawers, as shown in Figure 10. The specific structure of the pressing plate 17 is shown in Figure 9, one side of which is a barb groove, and one side is a flat head. One side of the flat head is inserted into the through hole 16 and the left ear fixing device, and then the right ear fixing device is closed to block the barb groove of the pressing plate 17 to prevent the wire inlet device from moving.

A boss 18 as shown in Figure 1 and Figure 2 is provided on the top of the side where the incoming line housing 2 is plugged in with the vertical copper bar, and the fixing strip 19 shown in Figure 10 is provided to fit the boss 18 The fixing hole, the fixing bar 19 is pressed above the boss 18 to prevent the wire inlet housing 2 from moving.

Through the switch outside the drawer cabinet, the pushing part of the drawer cabinet is controlled to push the device of the present invention, thereby driving the slider 13 to move the contact piece 3 .

As shown in Figures 11 and 12, the slider 13 moves forward so that the contact piece 3 can slide relative to the vertical copper bar 20, that is, under the condition that the vertical copper bar 20 can remain stationary with the terminal, the contact piece 3Swipe. When the contact piece 3 is not in contact with the vertical copper bar of the drawer cabinet, the contact piece 3 is separated to both sides by the pretensioning rib 7 of the pretensioning mechanism in the incoming line housing 2, so that the contact piece 3 and the vertical copper bar 20 are finally in frictionless contact.

It should be noted that the material of the vertical copper bars 20 in the present invention can be replaced by other conductive materials such as aluminum and iron, and is not limited to the copper listed in the above-mentioned embodiments, as long as the purpose of conducting electricity can be achieved; the vertical copper bars 20 can also be Instead of a horizontal method, the structures of the vertical copper bars 20 and the terminal blocks 5 are not limited to the rectangular structures listed in the above embodiments, and their structures and arrangement methods can be determined according to specific installation requirements.

Although the present invention has been disclosed above with preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. Therefore, the scope of protection of the present invention should be based on the content defined by the claims of this application.

Claims (10)

1. packaged type line leading device, including contact (1) and inlet wire shell (2), it is characterised in that：

The contact (1) includes two panels contact (3), and the two panels contact (3) is symmetrical arranged centered on fixed pin (4), is formed One end is for the first open end with vertical copper bar (20) grafting, the second open end of the other end and connecting terminal block (5) grafting, The two panels contact (3) can be clamped to opening and closing by elastic clamp device realization, in the contact (3) of first open end There is the protrusion being oppositely arranged in side, and inserted terminal is made to form pre- grafting opening (6)；

The contact (1) is set in inlet wire shell (2), and being provided in the inlet wire shell (2) can be inserted into the pre- grafting and open The Yu Zhang mechanism that mouth (6) keeps the first open end pre-opening.

2. packaged type line leading device according to claim 1, it is characterised in that：The Yu Zhang mechanism is to be fixed on inlet wire The blade inserting matched in shell (2) with the pre- grafting opening (6) opens muscle (7) in advance.

3. packaged type line leading device according to claim 1, it is characterised in that：The elastic clamp device includes fixing Frame (8) and elastic piece (9) are provided with the first pillar (10) on the outside of the contact (3) of first open end, close to described the It is provided with the second pillar (11) on the outside of the contact (3) of two open ends, the elastic piece (9) is connected to the first pillar (10) and second Between pillar (11), and clamped by fixed frame (8).

4. packaged type line leading device according to claim 1, it is characterised in that：The contact (1) is fixed on two groups of cunnings Between piece (12), the overlapped combination of multiple groups slide plate (12) constitutes sliding block (13).

5. packaged type line leading device according to claim 4, it is characterised in that：It is equipped on the inside of the inlet wire shell (2) Guide rail, the sliding block (13) are plugged in the inlet wire shell (2) along the guide rail.

6. packaged type line leading device according to claim 1, it is characterised in that：It is equipped with above the inlet wire shell (2) Heat release hole (14).

7. packaged type line leading device according to claim 1, it is characterised in that：Inlet wire shell (2) lateral surface is set There are junction (15).

8. packaged type line leading device according to claim 7, it is characterised in that：The junction (15) is grafting dress It sets.

9. packaged type line leading device according to claim 1, it is characterised in that：In the inlet wire shell (2) and wiring The bottom of terminal block (5) grafting side is equipped with through-hole (16), and pressing plate (17) passes through the left and right that the through-hole (16) pass through drawout cubicle The fixed device of ear is fixed on drawout cubicle.

10. packaged type line leading device according to claim 1, it is characterised in that：The inlet wire shell (2) with it is vertical The top of copper bar (20) grafting side is equipped with boss (18), and fixed strip (19) is equipped with the fixation hole being adapted to the boss (18), Fixed strip (19) pressing is above the boss (18), to prevent the inlet wire shell (2) mobile.