WO2018001024A1

WO2018001024A1 - Isolating switch and power distribution system

Info

Publication number: WO2018001024A1
Application number: PCT/CN2017/086320
Authority: WO
Inventors: 南寅; 梁英杰; 王洪刚; 曾伟
Original assignee: 北京人民电器厂有限公司
Priority date: 2016-06-30
Filing date: 2017-05-27
Publication date: 2018-01-04
Also published as: CN106128865A; CN106128865B

Abstract

The present invention provides an isolating switch and a power distribution system. The isolating switch comprises: a housing provided with a first port through which a first wire passes and a second port through which a second wire passes; and a contact mechanism, which is connected with the first wire and with the second wire respectively, and is used for controlling the first wire and the second wire to be turned on or off, and is characterized in that the first port and the second port are located on the same side of the housing. The purpose of simplifying the wiring structure of the isolating switch and limiting the space occupied by the isolating switch is achieved.

Description

Isolation switch and power distribution system

Technical field

The invention belongs to the technical field of electrical switches, and in particular relates to an isolating switch and a power distribution system.

Background technique

In the existing terminal electrical distribution box, in order to meet the power distribution requirements, it usually includes power distribution appliances such as miniature circuit breakers, leakage protection, and leakage switches. Currently, for the power supply of the distribution box, the AC power or DC power is usually introduced into the power distribution. In the main switch in the cabinet, various load devices connected to the lower end circuit, such as routers, servers, minicomputers, etc., are powered by the branch switches connected in series with the main switch.

The conventional terminal electrical distribution box adopts a rail mounting method, that is, a plurality of isolating switches and circuit breakers in the input and output device are arranged side by side through the rails, wherein the main switch for connecting currents transmits power to each through wires In the branch switch, it is distributed to each electric appliance. Since the main switch needs to be connected from the upper end to the power line and the lower end lead is connected to the upper end of each branch switch, it requires a large installation space, and the resulting complexity The wiring work leads to the need to reserve enough wiring space for the distribution box in advance. The existing distribution box or the isolating switch can generally meet the wiring space requirement, but there is still a problem of large volume and complicated assembly process.

Summary of the invention

In order to effectively solve the above-mentioned one or more defects existing in the prior art, the present invention provides an isolating switch and a power distribution system, which can realize the wiring of the isolating switch more conveniently and reduce the occupation when connecting in the power distribution system. One or more purposes in space.

In order to achieve the above object, the present invention adopts the following technical solutions:

According to an aspect of the invention, there is provided an isolating switch comprising: a housing having a first port through which a first wire passes and a second port through which a second wire passes; a contact mechanism, Provided in the housing, which is respectively connected to the first wire and the second wire, and is used for Controlling the first wire and the second wire to be turned on or off, wherein the first port and the second port are located on the same side of the housing.

According to an aspect of the invention, the first port and the second port are located at a top end face of the housing.

According to an aspect of the invention, the first wire is connected to a power source, and the second wire is connected to a load.

According to an aspect of the invention, the contact mechanism further includes a first terminal connected to the first wire, and a second terminal connected to the second wire.

According to an aspect of the invention, the isolating switch further includes: a first connecting channel and/or a second connecting channel, the first connecting channel being disposed between the first port and the first terminal, And accommodating the first wire; the second connecting channel is disposed between the second port and the second terminal for receiving the second wire.

According to an aspect of the invention, the isolating switch further includes: a third port disposed on a side of the housing opposite to the first port and the second port, such that the first wire can Connecting to the first terminal through the third port.

According to an aspect of the invention, the first terminal is movably disposed in a first position and a second position in the housing, when the first wire is inserted from the first port, the first a terminal located at the first position connectable to the first wire; when the first wire is inserted from the third port, the first terminal is located to be connectable to the first wire The second position.

According to an aspect of the invention, the housing further includes a passage for receiving the first terminal to move between the first position and the second position.

According to an aspect of the invention, a limiting member for fixing the first terminal to the first position and/or the second position is provided in the passage.

According to another aspect of the present invention, there is also provided a power distribution system comprising: a mounting bracket; the above-described isolating switch; a branch switch; wherein the disconnecting switch and the branch switch are mounted on the mounting bracket and Electrically connected to each other.

DRAWINGS

The following drawings of the present application are hereby incorporated by reference in its entirety in its entirety herein in its entirety herein in its entirety The embodiments shown in the drawings and their description are to explain the principles of the invention. In the drawing:

1 is a schematic view showing the internal structure of an isolating switch according to an embodiment of the present invention;

Figure 2 is a schematic view showing the internal structure of the housing of the disconnecting switch of Figure 1;

Figure 3 is a schematic structural view showing a static contact of the disconnecting switch of Figure 1;

4 is a schematic structural view showing a contact holder of the disconnecting switch of FIG. 1;

FIG. 5 is a schematic structural view showing a limiting member of the disconnecting switch of FIG. 1; FIG.

6 is a schematic view showing the internal structure of an isolating switch according to another embodiment of the present invention;

7 is a schematic view showing the internal structure of an isolating switch according to still another embodiment of the present invention;

FIG. 8 is a schematic view showing the overall structure of a power distribution system according to an embodiment of the present invention.

detailed description

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are illustrated and However, it will be apparent to those skilled in the art that the present invention may be practiced without some of the details. The following description of the embodiments is merely intended to provide a better understanding of the invention. The present invention is not limited to any specific configuration as set forth below, but is intended to cover any modifications, substitutions and improvements of the structure and components of the present invention without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the technical solutions of the present invention.

In order to better understand the present invention, a disconnecting switch and a power distribution system according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 through 8.

FIG. 1 shows a schematic diagram of the internal structure of an isolation switch 100 according to an embodiment of the present invention. As shown in FIG. 1, by way of example, the isolating switch 100 is a 1P type isolating switch, wherein the first wire (ie, the power supply line 20) and the second wire (ie, the output wire 20') pass through the contacts inside the isolating switch 100. The mechanism is connected to form a control loop that can be turned on or off, and can be connected to The other load or the electric device at the lower end of the isolating switch 100 is controlled to be on and off, so that when it is installed in the circuit system, the operation safety can be ensured. The above-described first and second wires are not limited to being in the form of only wires, as long as other conductor forms capable of realizing power input or output can be used as power supply lines or output wires.

In order to connect the power supply line 20 and the output line 20' to the control loop, the communication or disconnection between the power supply line 20 and the output line 20' is controlled. For example, the corresponding power supply line 20 in the housing 10 and The output wires 20' are respectively configured with a first stationary contact 12 and a second stationary contact 12' and a movable contact 14 having two contact ends that can cooperate with the first stationary contact 12 and the second stationary contact 12'. Specifically, please refer to FIG. 1 and FIG. 2 together. FIG. 2 shows a housing 10 according to an embodiment of the present invention. The components of the isolating switch 100 are arranged in the housing 10, which is exemplarily shown in the figure. Half of the housing is out, and the half of the housing cooperates with the other half of the housing to encapsulate the components.

According to an embodiment of the present invention, in order to simplify the wiring arrangement of the isolating switch 100 and facilitate connection with an external electrical device, the housing 10 is provided with a first port 105 and a second port 106 on the same side, a power supply line 20 and an output. The wire 20' is connected to the first static contact 12 and the second static contact 12' inside the isolating switch 100 through the first port 105 and the second port 106, respectively, and the isolating switch is connected to the external electric device through the same side, It avoids the problem that the conventional isolation switch needs to be connected from the upper part to the power supply line and the output line from the lower part is complicated to be connected and the installation cost is increased, and the isolation switch can be saved compared with the upper and lower wiring manner. The space occupied in the circuit system. Of course, the first port 105 and the second port 106 can also be disposed on other sides of the housing 10 according to actual connection needs.

Illustratively, as shown in FIGS. 1 and 2, the first port 105 and the second port 106 are opened at the top end face of the housing 10 corresponding to the position of the power inlet 20 and the position of the output lead 20', respectively, and the first port 105 is opened. A connecting passage 101 is formed extending downward along the inner wall of the casing 10. In order to avoid affecting the mounting position of other components in the casing 10, the connecting passage 101 is disposed adjacent to the rear side wall of the casing 10. The connecting passage 101 may be a semi-grooved structure formed by a flange formed on the inner wall of the casing 10 and a rear side wall of the casing 10, and the power supply line 20 is disposed in the casing 10 through the connecting passage 101 and Fixed so that the power inlet 20 can be accurately and securely placed.

The first stationary contact 12 includes a first terminal 11 for connection with the power supply line 20 and a body that is in contact with the movable contact 14. The first terminal 11 and the body may be separated or integrated structure. Taking the split structure as an example, in order to arrange the first terminal 11 relative to the first port 105, the bottom of the housing 10 is provided with a first fixing slot 102, and the first terminal 11 is connected by a crimping frame and a crimping frame. The screw assembly is such that the power inlet 20 is inserted through the first port 105 into the crimping frame and fastened by a screw fit so as to be securely coupled in the housing 10. The body of the first stationary contact 12 (shown in FIG. 3 ) is a connection position with the power inlet 20 and the movable contact 14 , and is provided with a fixing portion 121 , a connecting portion 122 and a supporting portion 123 , and the stationary contact 124 faces The movable contact 14 is disposed at the support portion 123, and the connecting portion 122 is inserted into the crimping frame, and the power feeding line 20 and the first static contact 12 are fixed by the fastening action of the screw, and the first static contact is fixed. 12 and the power supply line 20 are in contact with each other for electrical connection. When the first terminal 11 and the body are in an integrated structure, the body of the first static contact 12 is provided with a connection portion connectable with the power supply line 20, or the first static contact 12 and the power supply line are connected by welding. 20 electrical connections.

In the above embodiment, the connection channel 101 is configured as a semi-grooved structure, but the arrangement of the connection channel in the present invention is not limited thereto, as long as the auxiliary installation and fixing of the power supply line 20 can be realized, in other implementations. For example, a half-slot structure may be respectively disposed on the inner walls of the two halves of the casing, and the power inlet line 20 is disposed through the tubular passage formed after the butting, so that during the frequent on-off operation of the disconnector 100, the pair is avoided. The connection of the power supply line 20 adversely affects the stability of the structure. Of course, in the case where the connection passage 101 is not provided inside the casing 10, the power supply line 20 can also be disposed inside the casing 10 by, for example, a fixing claw or a fixed buckle.

The structure of the second stationary contact 12' is similar to that of the first stationary contact. In order to arrange the second terminal 11 ′ relative to the second port 106 , a second fixing groove 102 ′ is disposed in the housing 10 , and the second terminal 11 ′ is also composed of a crimping frame and a screw, and the output wire 20 ′ passes through The second port 106 is inserted into the housing 10 into the crimping frame and fastened by a screw fit to secure the output lead 20' within the housing 10. The body of the second stationary contact 12' is inserted into the crimping frame by screw fastening, and is fixed to the housing 10 together with the output lead 20', and is in contact with and electrically connected to the output lead 20'. Of course, a connecting passage for placing the output wire 20' may be provided inside the casing 10 as space permits, so that the output wire 20' is also firmly fixed.

The first terminal and the second terminal in the above embodiment are respectively composed of a crimping frame and a screw, but the first terminal and the second terminal in the present invention are not limited thereto, as long as It is possible to make the wire and the fixed contact contact and fix. In other embodiments, the terminal can also be other forms of clamping structure.

The movable contact 14 is mounted in the housing 10 and has two movable contacts. The power supply can be realized by the contact and separation between the two movable contacts and the first fixed contact 12 and the second fixed contact 12', respectively. Powering and disconnecting between line 20 and output lead 20'. As shown in Fig. 1, in particular, the contact mechanism includes a contact holder 15, a spring 13, a spring 13', a spring 18, and a movable contact 14. The contact holder 15 is disposed in the middle of the housing 10 as a supporting structure. Referring to FIG. 4, a schematic structural view of the contact holder 15 according to the embodiment of the present invention is shown. As shown, the contact holder 15 is shown. The longitudinally disposed propulsion portion 150 and the laterally disposed return portion 150' intersect in a T-shape, and the return portion 150' is provided with an opening for inserting the movable contact 14 near the intermediate position, and the movable contact 14 is mounted through the opening to the contact holder. 15, the springs 13 and 13' respectively abut between the push grooves 154 and 154' of the push portion 150 and the ends of the movable contact 14, the spring 18 abutting against the cavity of the return portion 150' and the support in the housing 10. Between the slots 104. The handle 16 is mounted on the handle mounting base 103 of the housing 10, and is connected to the connecting hole 153 of the contact bracket 15 through the connecting rod 17, forming a thrust mechanism, and the contact bracket 15 can be driven by the connecting rod 17 by the rotation of the operating handle 16. The movement thus causes the springs 13 and 13' to be compressed to urge the movable contact 14 to move toward the first stationary contact 12 and the second stationary contact 12'. When the handle 16 is rotated counterclockwise to the extreme position, the springs 13 and 13' are The movable contact 14 applies a uniform thrust to make contact with the first fixed contact 12 and the second fixed contact 12', that is, the control loop of the isolating switch 100 is turned on, and current can flow from the power incoming line 20 to the output lead 20'. It is delivered to a load or electrical device connected to the lower end of the isolating switch 100. When the reverse rotation force is applied to the handle 16, the thrust of the contact holder 15 is cancelled. Under the repulsive force of the spring 18, the contact holder 15 drives the movable contact 14 away from the first fixed contact 12 and the second. The static contact 12' moves in the direction, and finally the handle rotates to the limit position in a timely manner, resulting in separation and power-off between the movable contact 14 and the first fixed contact 12 and the second fixed contact 12', that is, the internal of the isolating switch 100 is cut off. The control loop, the power supply line 20 is disconnected from the output lead 20', and the supply of power to the load or electrical device connected to the lower end of the isolating switch 100 is stopped.

In the above embodiment, the power supply line 20 is connected to the first terminal 11 at the lower portion of the casing 10, and the second terminal 11' of the output wire 20' connected to the upper portion of the casing 10 is not fixed, in other embodiments. In the middle, the power inlet 20 can also be connected to the second terminal of the upper part of the casing 10. 11', and connecting the output wire 20' to the first terminal 11 disposed at the lower portion of the housing, the isolation switch 100 can also be connected to the power inlet through the first port 105 and the second port 106 of the top end of the housing 10. The current and the output current connected to the electrical device or load control the energization and de-energization of the load connected to the lower end or the electrical device. Moreover, when the contact mechanism is disposed laterally or is a contact mechanism of other structures, the power supply line and the output wire may be fixed at the same height position inside the casing.

According to an embodiment of the present invention, the isolating switch 100 further includes a third port 107 disposed on a bottom end surface of the housing 10 opposite to the first port 105 and the second port 106 such that the power inlet 20 can pass through The three port 107 is inserted from the lower end of the isolating switch and connected to the first stationary contact. The first stationary contact in this embodiment has the same structure as the second stationary contact 12' in the isolating switch 100. When the power inlet 20 is not connected to the first stationary contact through the third port 107, the third port 107 is always blocked by a movable shutter 30 (as shown in FIG. 1). In order to make the first terminal 11 opposite to the third port 107, the power inlet 20 inserted through the third port 107 is fixed, and the first wiring can be passed through a limiting component (ie, the terminal limiting block 19). The terminal 11 is movably disposed in the first fixing groove 102. Referring to FIG. 5, as shown in FIG. 5, the terminal limiting block 19 includes a screw fixing cavity 192 and an operation hole 191. After the screw of the first terminal 11 is mounted and inserted into the screw fixing cavity 192, the terminal limiting block 19 Providing a good abutting force for the first terminal 11 and engaging the inner wall of the housing 10 such that the first terminal is movably disposed in the first fixing slot 102 at the first position and the second position, thereby The connection position of the line 20 is changed. When the power supply line 20 is inserted from the first port 105, the first connection terminal 11 is located at a first position connectable to the power supply line 20; when the power supply line 20 is inserted from the third port 107 The first terminal 11 is located at a second position connectable to the power supply line 20. For example, an internal structure diagram of the isolation switch 300 according to still another embodiment of the present invention shown in FIG. As shown in the figure, the isolating switch 300 in this embodiment is similar to the isolating switch 100 in the above embodiment, except that the isolating switch 300 in the embodiment blocks the first port 105 through the movable baffle 30. The power inlet 20 is inserted into the housing 10 through the third port 107, and the terminal limiting block 19 is removed from the first fixing slot 102, thereby moving the first terminal 11 to correspond to the third port 107. The power inlet line 20 and the first static contact 12 are connected and fixed at the position, so that the isolating switch 300 has multiple wiring modes, and the upper and lower portions respectively can be connected to the power supply line 20 And the output wire 20' is connected, so that the isolating switch 300 can realize the line switching arrangement according to actual needs, and meet different installation needs. Of course, the second terminal can also be movably disposed in the housing 10 in the same manner as the first terminal, thereby changing the connection position of the output wire 20' and the second stationary contact 12'.

In the above embodiment, it is exemplarily shown that the contact mechanism in the isolating switch controls the first wire and the second wire by contacting or disconnecting the moving contact having two contact ends by providing two static contacts. The contact mechanism in the isolating switch of the present invention is not limited thereto, and the contact mechanism in the isolating switch may also be realized by contact or separation between the corresponding moving and static contacts. Other structures for turning on and off the circuit formed by the first wire and the second wire, for example, in other embodiments, the contact mechanism may also have a pair of movable and static contacts that can be contacted or separated, The static contact and the movable contact are respectively connected to the first wire or the second wire, that is, the fixed contact and the movable contact respectively serve as the first connection end and the second connection end of the contact mechanism, respectively, and can also control the breaking of the internal circuit and closure.

FIG. 7 shows a schematic diagram of the internal structure of the isolation switch 200 in accordance with another embodiment of the present invention. Illustratively, the isolating switch 200 in the present embodiment is a 2P type isolating switch. As shown in the figure, the isolating switch 200 in this embodiment is combined by two of the above-mentioned isolating switches 100, except that in the isolating switch 200, the two handles 16 are connected by the operating rod 161 to form a unitary structure, that is, The two handles 16 can be rotated simultaneously by the operating rod 161. The working principle, advantages and other internal components are the same as the isolating switch 100, and therefore will not be described again.

FIG. 8 shows an overall structural diagram of a power distribution system 1 according to an embodiment of the present invention. As shown in FIG. 8, the power distribution system 1 has a mounting bracket and a plurality of circuit switches. The exemplary mounting bracket may also be a box. The housing includes a bottom case 50 and a cover plate (not shown). The back plate of the bottom case 50 is provided with a guide rail 60. The plurality of circuit switches are slidably engaged with the guide rail 60 through the card slot provided on the back side. The utility model is fixed on the guide rail 60, wherein the plurality of circuit switches comprise a total isolating switch and at least one branch switch, and the plurality of branch switches and the main isolating switch are electrically connected by the bus bars 40 and 40' electrically connected. Illustratively, in the embodiment, the total isolating switch is the isolating switch 200 in the above embodiment of the present invention, and the branch switch is the circuit breaker 400. The structure of the isolating switch 200 has been elaborated in the above embodiment, so it is no longer here. Narration. The isolating switch 200 passes two power sources through a first port at the top of the two isolating switches 100 and a first terminal disposed corresponding to the first port The inlet wires 20 are respectively fixed in the housing and connected to the control circuit inside thereof, and respectively connected to the bus bar 40 through the second ports also disposed at the top ends of the two isolating switches 100 and the second terminals disposed corresponding to the second ports. Connected to 40', so that the current from the power supply line 20 can pass through the control circuit inside the isolating switch 200, and then transmitted to the plurality of circuit breakers 400 via the bus bars 40 and 40', and the circuit breaker 400 is connected to the lower portion thereof. The output lead 70 delivers power further to the electrical load connected to its lower end.

The isolating switch is connected to the external conductor through the same side of the housing, so that the power distribution system no longer needs to separately reserve wiring space for the circuit connection between the isolating switch and the branch switch, as in the conventional power distribution system, thereby reducing the wiring space. The volume of the power distribution system does not require separate leads from the lower end of the disconnector to be connected to the busbars, reducing costs and simplifying the assembly process.

In the foregoing embodiment, only the power transmission between the isolating switch and the branch switch in the power distribution system is performed through the bus bar. According to actual installation requirements, the disconnecting switch and the branch switch may be connected by any conductor, for example, for example. wire. The connection is made by other conductors, and the isolating switch can also be connected through the ports on the same side of the housing to save space and optimize the line connection. Of course, the branch switch in the power distribution system is not limited to a circuit breaker, but may also be an air switch or other form of circuit switch.

In the foregoing embodiment, only a plurality of isolating switches and branch switches are fixed in the casing through the guide rails 60, but other structural pairing switches and branch switches may be used in the power distribution system according to actual installation requirements. In other embodiments, for example, a plurality of isolating switches and a branch switch may be arranged side by side by means of a plug-in board or a screw fastening method.

Claims

An isolating switch comprising:

a housing having a first port through which the first wire passes and a second port through which the second wire passes;

a contact mechanism, disposed in the housing, respectively connected to the first wire and the second wire, for controlling the first wire and the second wire to be turned on or off,

The first port and the second port are located on the same side of the housing.
The disconnector of claim 1 wherein said first port and said second port are located at a top end face of said housing.
The disconnector of claim 1 wherein said first lead is connected to a power source and said second lead is connected to a load.
The disconnector of claim 1, wherein the contact mechanism further comprises a first terminal connected to the first wire and a second terminal connected to the second wire.
The disconnecting switch according to claim 4, further comprising: a first connecting passage and/or a second connecting passage, the first connecting passage being disposed between the first port and the first connecting terminal for Accommodating the first wire; the second connecting channel is disposed between the second port and the second terminal for receiving the second wire.
The disconnector of claim 4, further comprising: a third port disposed on a side of the housing opposite the first port and the second port such that the first wire can be worn The third port is connected to the first terminal.
The disconnector of claim 6 wherein said first terminal is movably disposed in a first position and a second position in said housing,

The first terminal is located in the first position connectable to the first wire when the first wire is inserted from the first port;

The first terminal is located in the second position connectable to the first wire when the first wire is inserted from the third port.
The disconnector of claim 7 wherein said housing further includes a passage for receiving said first terminal to move between said first position and said second position.
The disconnector according to claim 8, wherein a stopper member for fixing the first terminal to the first position and/or the second position is provided in the passage.
A power distribution system comprising:

Mount;

The isolating switch according to any one of claims 1 to 9;

Branch switch

Wherein the isolation switch and the branch switch are mounted on the mounting bracket and electrically connected to each other.