CN111934419A

CN111934419A - Excitation type dual-power-supply quick change-over switch

Info

Publication number: CN111934419A
Application number: CN202010849715.XA
Authority: CN
Inventors: 龚叶; 刘凯
Original assignee: Nanjing Apaitek Technology Co ltd
Current assignee: Nanjing Apaitek Technology Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2020-11-13

Abstract

The invention discloses an excitation type dual-power-supply quick change-over switch, which comprises a shell, wherein a motor is arranged in the shell, the top end of a power shaft of the motor is fixedly connected with a change-over rod, a moving contact is fixedly arranged on the side wall of the change-over rod, a manual change-over knob is fixedly arranged at the top of the change-over rod, static contacts are symmetrically arranged in the shell, the static contacts are symmetrically arranged above the moving contact by taking the change-over rod as a circle center, excitation coils are wound on the two static contacts, and the two groups of excitation coils are respectively connected with a first resistor and a second resistor in series, so that the excitation type dual-: the excitation coil and the main circuit operate independently, are not influenced by the main circuit, can be kept in a working state for a long time, and are not easy to have faults; when the power supply is switched, the moving contact does not generate frictional resistance with other positions, and the connection stability of a circuit is not influenced even if abrasion occurs between the moving contact and the fixed contact in time.

Description

Excitation type dual-power-supply quick change-over switch

Technical Field

The invention relates to the technical field of double-power-supply change-over switches, in particular to an excitation type double-power-supply quick change-over switch.

Background

The dual-power transfer switch is a switch capable of switching between two power supplies, and along with the development of social economy, the dual-power transfer switch is widely applied to important places where power failure is not allowed, such as high-rise buildings, communities, hospitals, airports, wharfs, fire fighting, metallurgy, chemical engineering, textiles and the like.

The existing dual-power transfer switch generally adopts a mechanical locking device to control the selection of a power supply, the existing mechanical locking device generally performs power supply switching through manual operation, an operator must perform on-site control on the switch, the control is inconvenient for the operator, the switch switching can not be performed at the first time, and in addition, the problem of potential safety hazard also generally exists in manual control, so that the dual-power transfer switch is not suitable for popularization and use.

In the switching process between the common use and the standby use of the automatic dual-power transfer switch, the problem of blocking and suspending in the switching process occasionally occurs due to the reasons of parts, so that a coil is always burnt out when the coil works, and moreover, the moving contact and the fixed contact of the conventional dual-power automatic transfer switch are seriously abraded when a power supply is switched, and the situation of stable connection step can occur between the moving contact and the fixed contact for a long time.

Disclosure of Invention

The invention aims to provide an excitation type double-power-supply quick change-over switch to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an excitation type dual supply fast transfer switch, includes the shell, the inside of shell sets up the motor, the power shaft top fixed connection transfer bar of motor, the lateral wall fixed mounting moving contact of transfer bar, the manual conversion knob of top fixed mounting of transfer bar, the inside still symmetry of shell is provided with the static contact, the static contact uses the transfer bar as centre of a circle symmetry to set up in the top of moving contact, two the winding has excitation coil on the static contact, and is two sets of excitation coil is series connection first resistance and second resistance respectively, first resistance and second resistance are external main power source and auxiliary power source respectively.

As a further scheme of the invention: the power supply comprises a shell, a main wire hole and an auxiliary wire hole, wherein the main wire hole and the auxiliary wire hole are reserved on the shell and correspond to a main power supply and an auxiliary power supply, a first indicator lamp and a second indicator lamp are further arranged at the top end of the shell, the first indicator lamp is connected with a first resistor in series, and the second indicator lamp is connected with a second resistor in series.

As a further scheme of the invention: the static contact is of a flat rectangular structure, a hollow cylinder is arranged at the top of the dynamic contact, a sliding groove is formed in the cylinder from top to bottom, a limiting groove is formed in the side wall of the sliding groove, a vertical rod is installed in the sliding groove in a sliding mode, the top end of the vertical rod is fixedly connected with a circular dynamic contact piece, a limiting clamping block is arranged on the side wall of the vertical rod, and the limiting clamping block slides up and down in the limiting groove.

As a further scheme of the invention: the manual conversion knob is arranged outside the shell, and the conversion rod is fixedly connected with the shell through a bearing.

As a further scheme of the invention: the outer wall of shell still has the protection casing through bolt fixed mounting, manual conversion knob is located the protection casing.

Compared with the prior art, the invention has the beneficial effects that: the excitation coil and the main circuit operate independently, are not influenced by the main circuit, can be kept in a working state for a long time, and are not easy to have faults; when the power supply is switched, the moving contact does not generate frictional resistance with other positions, and the connection stability of a circuit is not influenced even if abrasion occurs between the moving contact and the fixed contact in time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the movable contact of the present invention;

fig. 3 is a top view of the movable contact structure of the present invention.

In the figure: the device comprises a shell 1, a motor 2, a change-over lever 3, a movable contact 4, a manual change-over knob 5, a fixed contact 6, a magnet exciting coil 7, a first resistor 8, a second resistor 9, a main wire hole 10, an auxiliary wire hole 11, a first indicator light 12, a second indicator light 13, a cylinder 14, a sliding groove 15, a limiting groove 16, a vertical rod 17, a movable contact 18 and a limiting fixture block 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, an excitation type dual power supply fast transfer switch includes a housing 1, a motor 2 is disposed inside the housing 1, the motor 2 is specifically a stepping motor, a transfer rod 3 is fixedly connected to a top end of a power shaft of the motor 2, a movable contact 4 is fixedly mounted on a side wall of the transfer rod 3, a manual transfer knob 5 is fixedly mounted on a top of the transfer rod 3, static contacts 6 are symmetrically disposed inside the housing 1, the static contacts 6 are symmetrically disposed above the movable contact 4 with the transfer rod 3 as a circle center, excitation coils 7 are wound on the two static contacts 6, two groups of the excitation coils 7 are respectively connected in series with a first resistor 8 and a second resistor 9, the first resistor 8 and the second resistor 9 are respectively externally connected with a main power supply and an auxiliary power supply, the manual transfer knob 5 is disposed outside the housing 1, conversion lever 3 passes through the bearing and realizes fixed connection with shell 1, the outer wall of shell 1 still has the protection casing through bolt fixed mounting, manual conversion knob 5 is located the protection casing, and its safety cover can misoperation lead to the power to be switched, also avoids receiving external factors's interference to lead to the mistake to switch simultaneously and switches.

It should be noted that the static contacts 6 may be set in different numbers according to actual needs, which has the advantage of reducing the time for switching the power supply, i.e., the main power supply and the auxiliary power supply are provided with a plurality of static contacts 6, and the surface of the housing 1 may be provided with a dial plate to prompt the switching prompt of the power supply.

It is worth noting that a main wire hole 10 and an auxiliary wire hole 11 corresponding to a main power supply and an auxiliary power supply are reserved on the housing 1, a first indicator light 12 and a second indicator light 13 are further arranged at the top end of the housing 1, the first indicator light 12 is connected in series with the first resistor 8, the second indicator light 13 is connected in series with the second resistor 9, whether the power supplies work normally or not can be confirmed by arranging the indicator lights, and meanwhile, the power supplies suitable for being connected can be selected accordingly.

It should be noted that the static contact 6 is a flat rectangular structure, the top of the dynamic contact 4 is provided with a hollow cylinder 14, the inside of the cylinder 14 is provided with a sliding slot 15 from top to bottom, the side wall of the sliding slot 15 is provided with a limiting slot 16, the sliding slot 15 is slidably provided with an upright rod 17, the top end of the upright rod 17 is fixedly connected with a circular dynamic contact 18, the side wall of the upright rod 17 is provided with a limiting fixture block 19, the limiting fixture block 19 slides up and down in the limiting slot 16, the dynamic contact 18 is only the central part of the circular structure, the outer ring part of the dynamic contact is made of iron material, the central part of the inner ring is made of copper conductive material, when the dynamic contact 4 moves to the right below the static contact 6, the dynamic contact moves upwards under the influence of the gravity to be connected with the static contact 6, thus realizing circuit connection, the limiting fixture block 19 limits the dynamic contact 18 from being separated from, because the connection direction of the two is up-and-down connection, and the motion amplitude of the movable contact 4 can be automatically adjusted along with the abrasion degree, the abrasion in the horizontal direction can not influence the connection stability of the circuit.

Example (b):

a circuit formed by the resistor, the indicator light, the magnet exciting coil 7 and the main power supply or the auxiliary power supply and the main circuit are parallel circuits which are not interfered with each other, the magnet exciting coil 7 is always kept in a working state and is not easy to have a fault, and meanwhile, whether the magnet exciting coil 7 has the fault or not can be judged through the indicator light;

when the power supply needs to be switched, the power supply can be switched by manually switching the knob 5 or the motor 2; when switching, the moving contact 4 rotates to be separated from the currently connected static contact 6, and when the moving contact 4 runs under another static contact 6, the moving contact is attracted by magnetic force to be communicated with the target static contact 6, so that the switching process of a power supply is realized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An excitation type dual-power-supply quick change-over switch comprises a shell (1), and is characterized in that: the switch comprises a shell (1), a motor (2) is arranged inside the shell (1), a switching rod (3) is fixedly connected to the top end of a power shaft of the motor (2), a moving contact (4) is fixedly installed on the side wall of the switching rod (3), a manual switching knob (5) is fixedly installed at the top of the switching rod (3), static contacts (6) are symmetrically arranged inside the shell (1), the static contacts (6) are symmetrically arranged above the moving contact (4) by taking the switching rod (3) as a circle center, two magnet exciting coils (7) are wound on the two static contacts (6), the two magnet exciting coils (7) are respectively connected with a first resistor (8) and a second resistor (9) in series, and the first resistor (8) and the second resistor (9) are respectively externally connected with a main power supply and an auxiliary power supply.

2. The excitation type dual power supply fast transfer switch according to claim 1, characterized in that: the novel LED lamp is characterized in that a main line hole (10) and an auxiliary line hole (11) corresponding to a main power supply and an auxiliary power supply are reserved on the shell (1), a first indicator lamp (12) and a second indicator lamp (13) are further arranged at the top end of the shell (1), the first indicator lamp (12) is connected with the first resistor (8) in series, and the second indicator lamp (13) is connected with the second resistor (9) in series.

3. The excitation type dual power supply fast transfer switch according to claim 1, characterized in that: the fixed contact (6) is of a flat rectangular structure, the top of the movable contact (4) is provided with a hollow cylinder (14), a sliding groove (15) is formed in the cylinder (14) from top to bottom, a limiting groove (16) is formed in the side wall of the sliding groove (15), an upright rod (17) is slidably mounted in the sliding groove (15), the top end of the upright rod (17) is fixedly connected with a circular movable contact piece (18), a limiting clamping block (19) is arranged on the side wall of the upright rod (17), and the limiting clamping block (19) slides up and down in the limiting groove (16).

4. The excitation type dual power supply fast transfer switch according to claim 1, characterized in that: the manual switching knob (5) is arranged outside the shell (1), and the switching rod (3) is fixedly connected with the shell (1) through a bearing.

5. The excitation type dual power supply fast transfer switch according to claim 1, characterized in that: the outer wall of shell (1) still has the protection casing through bolt fixed mounting, manual conversion knob (5) are located the protection casing.