CN211908688U - Mining multi-cavity low-voltage vacuum electromagnetic starter - Google Patents

Abstract

The utility model relates to a multi-cavity low-voltage vacuum electromagnetic starter for mining, belonging to the technical field of mine power supply; the problem that workers are easy to get an electric shock when overhauling the mining low-voltage vacuum electromagnetic starter is solved; the isolating switch is arranged in the isolating cavity, the incoming line of the isolating switch is connected with a wiring terminal of the incoming line cavity, the outgoing line of the isolating switch is connected with a fork terminal in the isolating cavity, and the electrical component is arranged in the body cavity; the utility model discloses divide the chamber design to satisfy the requirement of uncapping of outage, can guarantee workman safety inspection equipment.

Description

Mining multi-cavity low-voltage vacuum electromagnetic starter

Technical Field

The utility model relates to a mine power supply technical field specifically is a mining multicavity formula low pressure vacuum electromagnetic starter.

Background

The mining explosion-proof low-voltage vacuum electromagnetic starter is used for starting and stopping a three-phase squirrel-cage asynchronous induction motor which works for a long time and works discontinuously, and along with the continuous improvement of the mechanization and automation degree of coal mine production, motor equipment is widely used, the underground power supply capacity is increased continuously, and higher requirements are provided for the reliability and the safety of an underground power supply system.

Along with the continuous improvement of mine output and automation level, the stable and reliable operation of underground explosion-proof electrical equipment becomes more and more important, and the mining explosion-proof low-voltage vacuum electromagnetic starter is used for starting and stopping a three-phase squirrel-cage asynchronous induction motor which works for a long time and works discontinuously and reversing when the motor stops, and can protect the motor from abnormal conditions such as overload, short circuit, phase failure, electric leakage and the like. Although the coal miners overhaul the low-pressure vacuum electromagnetic starter according to standard regulations, the overhaul work basically mainly comprises fastening screws. The mining low-voltage vacuum electromagnetic starter used in the past is divided into a body cavity and a wiring cavity, incoming wires and outgoing wires share one cavity, incoming wire terminals are protected by an insulating cover plate, a worker generally disconnects the switch contactor during maintenance, the incoming wire terminals are electrified, the outgoing wire terminals are not electrified, and a worker maintains the outgoing wire terminals according to own experience, but safety accidents caused by touching the incoming wire terminals cannot be avoided; secondly at present low pressure electromagnetic starter uncovers the outage shutting function and relies on isolator's handle axle and door closure to establish the shutting relation, and when isolator outage, after equipment uncovered, body intracavity isolator's inlet wire side electrified, unsatisfied outage uncovering requirement, the workman overhauls electrical components and causes the electric shock very easily and injures people's accident moreover.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a mining multicavity formula low pressure vacuum electromagnetic starter, solves the problem that the workman easily electrocuted when overhauing mining low pressure vacuum electromagnetic starter.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A mining multi-cavity low-voltage vacuum electromagnetic starter comprises a shell, an electrical assembly and an isolating switch, wherein the electrical assembly and the isolating switch are arranged in the shell, a door cover is arranged on the shell, and the electrical assembly comprises a power supply control unit, a control transformer, a contactor, a current transformer, a relay, a fuse and a resistance-capacitance absorber; the casing include the inlet wire chamber, be qualified for the next round of competitions the chamber, keep apart chamber and this body cavity, the inlet wire chamber is provided with travel switch respectively with the intracavity of being qualified for the next round of competitions, the inlet wire intracavity is provided with binding post, isolator sets up at the isolation intracavity, isolator's inlet wire is connected the binding post in inlet wire chamber, the fork terminal of keeping apart the intracavity is connected to being qualified for the next round of competitions, the electric component setting in this body intracavity.

Furthermore, an emergency stop button is arranged in the isolation cavity, and the emergency stop button is used for controlling the switching-on and switching-off of the contactor.

Further, a mechanical locking mechanism is arranged between the emergency stop button and a handle shaft of the isolating switch.

Furthermore, a mechanical locking structure is arranged between the handle shaft and the door cover.

Further, the door cover adopts a translation type quick door opening mechanism.

The utility model discloses produced beneficial effect does for prior art.

1. Low pressure electromagnetic starter equipment compares with current electromagnetic starter, divides the chamber design, and original low pressure electromagnetic starter only wiring chamber and body chamber, this structure have the inlet wire chamber, be qualified for the next round of competitions the chamber, keep apart chamber, this body chamber. The inlet wire cavity and the outlet wire cavity are designed in a separated mode, and a travel switch is mounted in each cavity, so that the requirements of power-off uncovering are completely met, and the safety maintenance equipment of workers can be guaranteed.

2. The utility model discloses place isolator at a cavity alone in ordinary low pressure vacuum electromagnetic starter, can guarantee that contactor inlet wire and all components and parts of other secondary sides all belong to the power-off state under the power-off state of opening the door, avoid workman low pressure electric shock.

3. The utility model discloses the door closure on the well starter device adopts the translation formula mechanism of opening the door soon, the switch of the door closure of being convenient for to the door closure does not sink, has effectively avoided the damage that smooth surface between door closure and the casing body caused, thereby has guaranteed the leakproofness and the security of switch, has improved the life and the production efficiency of starter switch.

Drawings

Fig. 1 is a front view of the multi-cavity low-voltage vacuum electromagnetic starter of the present invention.

Fig. 2 is a rear view of the multi-cavity low-voltage vacuum electromagnetic starter of the present invention.

The emergency stop device comprises an emergency stop button 1, a handle shaft 2, a locking mechanism 3, a fork type wiring terminal 4, an isolating switch 5, a contactor 6, a current transformer 7, a fuse 8, a control transformer 9, a resistance-capacitance absorption 10, a relay 11, an incoming line cavity 12, an outgoing line cavity 13, a body cavity 14, an isolation cavity 15, a protector 16 and a door cover 17.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1 and fig. 2, the mining multi-cavity low-voltage vacuum electromagnetic starter comprises a housing, an electrical component and a disconnecting switch 5, wherein the electrical component and the disconnecting switch 5 are arranged in the housing, a door cover 17 is arranged on the housing, and the electrical component comprises a power supply control unit, a control transformer 9, a contactor 6, a current transformer 7, a relay 11, a fuse 8 and a resistance-capacitance absorber 10; the power supply control unit meets various underground protection functions, the contactor 6 ensures the connection and disconnection of the circuit, the current transformer 7 is responsible for monitoring the large current of the circuit, the contactor 6 and the auxiliary contact of the relay 11 form a leakage detection loop, and when the insulation resistance of the main loop to the ground is lower than a specified value, leakage locking is carried out.

The shell comprises an incoming line cavity 12, an outgoing line cavity 13, an isolation cavity 15 and a body cavity 14; the electrical components are disposed within the body cavity 14; the incoming line chamber 12 and the chamber 13 of being qualified for the next round of competitions are provided with travel switch respectively, be provided with fork binding post 4 in the incoming line chamber 12, isolator 5 sets up in keeping apart the chamber 15, fork binding post 4 connects outside power cable, outside power cable gets into and keeps apart chamber 15 and connects isolator 5, isolator 5's the fork terminal of being qualified for the next round of competitions in the connection isolation chamber 15, install travel switch in the incoming line chamber 12 in addition, introduce higher level switch with the node, utilize the compressing tightly of wiring chamber apron and loosen state control travel switch's node break-make, thereby realize the function of the outage of uncapping.

An emergency stop button 1 is also arranged in the isolation cavity 15, and the emergency stop button 1 controls the switching-on and switching-off of the contactor 6. A locking mechanism 3 is arranged between the emergency stop button 1 and a handle shaft 2 of the isolating switch 5, the rotation power failure of the handle shaft 2 of the isolating switch 5 can be realized only by pressing a contactor of the emergency stop button 1 to open a brake, and the power failure of the isolating switch 5 with load is avoided; mechanical shutting between isolator's handle axle 2, two locks of preventing and the door closure, the contactor cuts off the power supply back and separates the switch handle and rotate, and two locks of preventing just can rotate, and door closure 17 can be opened, really satisfies the requirement that the body chamber cuts off the power supply and uncaps.

The outgoing line cavity 13 is internally mainly provided with an outgoing line terminal and a nine-core wiring terminal, the fork type wiring terminal in the outgoing line cavity 13 is connected with the outgoing line end of the contactor to lead out electric power through the cable leading-in device, the uncovering power-off principle is similar to that of the incoming line cavity, and when the outgoing line cavity 13 is opened, the contactor in the body is powered off, so that the power-off of the outgoing line cavity is guaranteed.

A power supply control unit, a control transformer 9, a contactor 6, a current transformer 7, a relay 11, a fuse 8, an intrinsic safety module, a resistance-capacitance absorption 10 and a protector 16 are arranged in the body cavity 14. The protector 16 mainly calculates, analyzes and judges data collected by the current transformer 7, and outputs a signal to control the on-off of the contactor 6; the contactor 6 mainly realizes the on-off of the main circuit by receiving the signal action of the protector 16 and the secondary circuit; an electrical lock is established between the contactor 6 and the isolating switch 5 through the emergency stop button 1.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims (5)

1. A mining multi-cavity low-voltage vacuum electromagnetic starter comprises a shell, an electrical assembly and a disconnecting switch (5), wherein the electrical assembly and the disconnecting switch are arranged in the shell, a door cover is arranged on the shell, and the electrical assembly comprises a power supply control unit, a control transformer (9), a contactor (6), a current transformer (7), a relay (11), a fuse (8) and a resistance-capacitance absorber (10); the novel cable-leading device is characterized in that the shell comprises a cable-leading cavity (12), a cable-leading cavity (13), an isolation cavity (15) and a body cavity (14), travel switches are respectively arranged in the cable-leading cavity (12) and the cable-leading cavity (13), a wiring terminal is arranged in the cable-leading cavity (12), the isolation switch (5) is arranged in the isolation cavity (15), the wiring terminal of the cable-leading cavity (12) is connected with the cable-leading of the isolation switch (5), the cable-leading is connected with a fork terminal in the isolation cavity (15), and the electrical assembly is arranged in the body cavity (14).

2. A mining multi-cavity low-voltage vacuum electromagnetic starter according to claim 1, characterized in that an emergency stop button (1) is arranged in the isolation cavity (15), and the emergency stop button (1) controls the closing and opening of the contactor (6).

3. A mining multi-chamber low-pressure vacuum electromagnetic starter according to claim 2, characterized in that a mechanical locking mechanism (3) is arranged between the emergency stop button (1) and the handle shaft (2) of the disconnector.

4. A mining multi-chamber low-pressure vacuum electromagnetic starter according to claim 3, characterized in that a mechanical locking structure (3) is arranged between the handle shaft (2) and the door cover.

5. The mining multi-cavity low-pressure vacuum electromagnetic starter as claimed in claim 4, wherein the door cover adopts a translational quick-opening mechanism.

Images