CN2153884Y

CN2153884Y - Mine explosion-proof reversible magnetic switch

Info

Publication number: CN2153884Y
Application number: CN 93230737
Authority: CN
Inventors: 刘�东; 王法营
Original assignee: XINWEN MINE USE ELECTRICAL APPLIANCE FACTORY
Current assignee: XINWEN MINE USE ELECTRICAL APPLIANCE FACTORY
Priority date: 1993-04-20
Filing date: 1993-04-20
Publication date: 1994-01-19
Anticipated expiration: 2003-04-20

Abstract

The utility model relates to a mine explosion-proof reversible magnetic switch, which belongs to low voltage power supply equipment in a coal mine well and an explosive environment. The utility model controls the start, stop and reverse of an alternating current motor whose power is under 25 kw. The explosion-proof outer casing has a small-sized squareness gate box type structure. Two groups of alternating current contactors, control transformers and thermorelays which all adopt small-sized devices are arranged in a casing body. The thermorelays are multifunctional comprehensive protectors. The dimension of a main body is less than or equal to 150*250*350 mm. The weight of a whole body is less than or equal to 25 kilograms. The utility model has the advantages of small size, light weight, good protective characteristic, high reliability, portability, fixing installation and low cost compared with similar products.

Description

Mine explosion-proof reversible magnetic switch

The utility model relates to the down-hole low-voltage power supply equipment, further is to be used for the upper and lower and explosive atmosphere of coal mine, for control 25KW following alternating current motor open, stop, the commutate reversible magnetic starter of flame-proof type of usefulness.

The domestic like product of prior art owing to consider to prevent to cause the needs of gas, coal-dust explosion, must adopt flameproof enclosure, causes equipment heaviness, volume big, makes troubles to transportation, installation, maintenance.

Purpose of design of the present utility model is to overcome weak point of the prior art, and provides under a kind of suitable coal mine and volume that explosive atmosphere is used is little, in light weight, protective feature is good, reliability is high, be easy to carry and the reversible magnetic starter of hard-wired small-sized flame-proof mine.

Purpose of design of the present utility model can reach by following measure:

Flameproof enclosure is being arranged; it comprises housing, protecgulum, terminal box, cable entry and securing member thereof; have in the housing in the reversible magnetic starter of flame-proof type of two groups of three-phase ac contactors, control transformer, thermal relay, stop button; its flameproof enclosure is adopted small-sized square door case structure; three-phase ac contactor 18, control transformer 14, thermal relay 20 in the housing 8 all adopt miniature device, and thermal relay 20 adopts the multifunctional comprehensive protection relay.

Purpose of design of the present utility model can also reach by following measure:

Its three-phase ac contactor 18 adopts B25 type or product of the same type, and thermal relay 20 adopts T25 type or product of the same type, and control transformer 14 adopts C sections core miniature transformer.

Whole starter size of main body: thick * wide * height≤150 * 250 * 350mm, overall weight≤25kg.Flameproof enclosure top is provided with handle 10.

The utility model compared with prior art has following advantage:

1. volume is little, in light weight, protective feature is good, reliability is high, is easy to carry and fixedly mounts, and is flexible and convenient to use.The general 90kg of the weight of domestic existing like product, the weight of this starter is 25kg only.

2. low cost of manufacture, reduce cost half.

The drawing of accompanying drawing is described as follows:

Fig. 1: structural representation front view of the present utility model

Fig. 2: structural representation right side view of the present utility model

Fig. 3: internal structure schematic diagram of the present utility model

Fig. 4: electric circuit diagram of the present utility model

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1,2 shows flameproof enclosure structure of the present utility model, and it is small-sized square door case structure, mainly by protecgulum 1, and housing 8, the terminal box loam cake 9 of shell upper, the cable entry of terminal box---typhon mouth 2,5,

toy trumpet mouth

3,6, and securing member is formed.Explosion-proof sign board 7 and the outage alarm plate 4 of uncapping is arranged on the protecgulum 1, and the side of housing 8 has the end face of stop button seat 13 loam cakes 9 that handle 10 is arranged, and underframe plate 21 is arranged at the bottom of housing 8, and all the other are the sealing ring 12 in hold-down bolt 11, the horn mouth.

Fig. 3 shows the structure of the utility model flameproof enclosure inside.Two groups of three-phase ac contactors 18, control transformer 14, thermal relay 20 are arranged in the housing 8.Two groups of A.C. contactors 18 adopt small-sized, the high-performance three-phase ac contactor of B25 type, between the two three-phase alternating current contactors mechanical latching 19 are arranged.Control transformer 14 adopts C sections core miniature transformer.Thermal relay 20 adopts the T25 types, and it is multifunctional comprehensive protection relay small-sized, that have overload, overcurrent, overheated, short circuit, the phase failure, under-voltage, o-volt protection.All the other are stop button pin 15, stop button 17, binding post 16.For reduced volume, weight reduction, simplify part-structure, save isolating switch, main control loop fuse etc.The main body of whole reversible magnetic starter (comprising terminal box) size: thick * wide * height≤150 * 250 * 350mm, overall weight≤25kg.

Fig. 4 shows the utility model electric circuit diagram.Symbol and demonstration of the type thereof are as follows among the figure:

ZC: forward control A.C. contactor, B25 type, 380,660V/16,30A, 24KW;

FC: oppositely control A.C. contactor, the same;

ZC-1: forward control A.C. contactor normally closed contact;

FC-1: oppositely control the A.C. contactor normally closed contact;

ZC-2: forward control A.C. contactor normal opened contact;

FC-2: oppositely control the A.C. contactor normal opened contact;

RJ1: forward control thermal relay, T25 type;

RJ2: oppositely control thermal relay; With the former is one group;

RJ1-1: forward control loop thermal relay normally closed contact;

RJ2-2: reverse control loop thermal relay normally closed contact;

B: control transformer (14), BKC-70 type, 660,380V/36V, 70VA;

TA1: stop button seat 17, this locality stops usefulness, the JYB type;

RD: fast acting fuse, 15A;

X1, X2, X3: three-phase inlet wire binding post;

D1, D2, D3: the three-phase binding post that connects motor;

FA, ZA, TA: external oppositely, forward, stop control button;

1#, 2#, 3#, 4#: binding post.

Claims

1, the reversible magnetic starter of flame-proof type used of a kind of mine and explosive atmosphere; flameproof enclosure is arranged; it comprises housing, protecgulum, terminal box, cable entry and securing member thereof; two groups of three-phase ac contactors, control transformer, thermal relay and stop buttons are arranged in the housing; it is characterized in that flameproof enclosure is small-sized square door case structure; three-phase ac contactor (18), control transformer (14), thermal relay (20) in the housing (8) are miniature device, and thermal relay (20) is the multifunctional comprehensive protection relay.

2, reversible magnetic starter according to claim 1, it is characterized in that said three-phase ac contactor (18) is B25 type or product of the same type, thermal relay (20) is T25 type or product of the same type, and control transformer (14) is a C sections core miniature transformer.

3, reversible magnetic starter according to claim 1 and 2 is characterized in that size of main body≤150 * 250 * 350mm, overall weight≤25kg, and handle (10) is arranged at flameproof enclosure top.