CN2094131U - Plunger flame-proof on-off device - Google Patents

Abstract

The utility model relates to an inserting rod type explosion-proof on-off device which is suitable for supplying electricity in small-sized device networks in underground coal mines or places with hazardous gas. The utility model is mainly composed of an outer housing, a leading wire device, a control switch, a PTC device, a wire connection frame, a static contact point, an inserting rod type plug and an interlocking device, wherein, the interlocking device control the opening and the closing of a switch, the control switch is a bidirectional control switch, and the PTC device plays the function of overload protection in circuits. When the utility model with simple structure is used for detecting controlled electrical appliances, the interlocking device is only required to be controlled to cut off two phases of a circuit, without needs of cutting off the whole circuit; the utility model improves detecting efficiency and is safe.

Description

Plunger flame-proof on-off device

The utility model relates to a kind of on-off device, the explosion-proof on-off device of a kind of inserted-link type of more specifically saying so.Be applicable to compact electric apparatus equipment networkings such as place, petrochemical industry place and the military installations power supply usefulness that explosion risk gas is arranged under the coal mine or coal dust is arranged.

Light fixture under the mine is the control that is subjected to master switch under the mine or switch-dividing, every switch is control tens or hundreds of desk lamp tool approximately, change a desk lamp tool, need application to have a power failure, set up alarm plate or special messenger supervision, can stop master switch or switch-dividing, can change light fixture, whole process approximately needs 50～60 minutes, if light fixture is also uncontrollable because of the overload heating.When other miniature electrical equipment need overhaul, also need to have a power failure through application, set up alarm plate or send the special messenger, can overhaul, this course of work takes a lot of work, time-consuming, extremely inconvenience.

The purpose of this utility model is to have designed the explosion-proof on-off device of a kind of inserted-link type in order to overcome above-mentioned the deficiencies in the prior art part, does not need line outage with regard to replaceable light fixture or maintenance, improves work efficiency greatly.

The purpose of this utility model can realize by following manner: the explosion-proof on-off device of a kind of inserted-link type, comprise shell, its cavity internal fixation control switch, link frame on the control switch, the right side of shell is airtight with loam cake, it has line introducing device and line ejector respectively in both sides up and down, in the small garden hole in shell left side interlock is installed, the one end is being controlled control switch, fixing three fixed contacts on the midfeather of shell cavity, one end of fixed cover is being fixed the control introducing device, the other end is moving contact fixedly, moving contact is corresponding with fixed contact, the PTC device is fixed on the control switch, and the one end links to each other with a contact of fixed contact, and the other end links to each other with an output contact of control switch, on another joint another contact through receiving fixed contact behind the control switch, the intermediate contact of fixed contact is an earth point on the patch bay.

The utlity model has following advantage: on-off device in use, the inserted-link type plug can not get loose voluntarily, as the inserted-link type plug is got loose, current-carrying part does not have, the PTC device also is off status, and the power supply of next equipment is directly to draw from patch bay, be not affected, thereby the element of replaceable electric equipment by the control of this on-off device, improved operating efficiency greatly got final product as changing a desk lamp tool in about 3 minutes, convenient and safe reliable, be a kind of electric small controlling equipment that uses in dangerous property damp place.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model.

Accompanying drawing 2 is moving contact structure schematic diagrames of the present utility model.

Accompanying drawing 3 is the utility model circuit diagrams.

The utility model is described in further detail with reference to the accompanying drawings:

With reference to accompanying drawing 1; shown in 2: the explosion-proof on-off device of a kind of inserted-link type; include a shell 11; macromolecular material with insulation is made; one open-ended cavity is arranged on it; bottom in the cavity is fixed on control switch 7 on the wall of chamber with screw; it is a kind of thermistors that control switch 7 can select for use KBC-AOI/64A250V to exchange two phase controlling switch PTC devices 6; be placed in control switch 7 upsides; when overload takes place in electric equipment; the PTC device produces heat; resistance value will change in time; electric current is descended, be in " pass " state, the protection electric equipment normally moves; control switch 7 upsides also are fixed with patch bay 9; two joints are arranged on it, be used to introduce or the joint of extracting power supply cord, the cavity right openings is fixed on loam cake 10 on the opening with screw; loam cake 10 is explosion-proof composition surface with the composition surface of the cavity of shell 11, and the macromolecular material of loam cake 10 usefulness insulation is made.The both sides up and down of the cavity of shell 11 have the garden columnar projections of mesopore respectively, it makes lead can enter in the cavity, fixing line introducing device 8 and line ejector 15 on the garden columnar projections of mesopore respectively, line introducing device 8 and line ejector 15 all are that sealing ring is arranged, composition is chewed in jam packing ring and wiring, sealing ring, jam, packing ring is packed in the mesopore garden columnar projections of shell both sides about in the of 11 in turn, chew axial location with wiring, when cable need be introduced or draw, need taking-up is chewed in wiring, jam is removed, cable passes wiring successively and chews, packing ring and sealing ring are then chewed wiring and are tightened, by packing ring crush seal circle, sealing ring has certain elasticity, choke cable after it is pressed, cable is stuck, can make sealing in the cavity again.There is a projection in shell 11 left sides, its upside along continuous straight runs has hole, a garden, be not communicated with cavity, there is a midfeather to separate, three fixed contacts 5 in die casting on midfeather, three fixed contacts 5 are on same straight line, and wherein Zhong Jian contact is in the center in hole, garden, shell 11 left side, and two contacts of both sides are symmetrical in middle contact.At hole, garden, shell 11 left side internal fixation one inserted-link type plug, described inserted-link type plug is mainly by fixed cover 3, and control introducing device 1, moving contact 4 are formed.The macromolecular material of fixed cover 3 usefulness insulation is made, its profile in a tubular form, on the one distolateral wall flange is arranged, its hole, garden, end internal fixation has control introducing device 1, it is identical with line introducing device 8 or line ejector 15 structures, the other end termination of fixed cover 3 fixedly moving contact 4 of hold-down screw 12, moving contact 4 has three contacts corresponding with three fixed contacts 5, and described moving contact 4 mainly is made up of line screw 4-1, patchboard 4-2, stage clip 4-3, moving contact fixed disk 4-5, contact 4-4.Three terminal screw 4-1 are that die casting is on the patchboard 4-2 of garden plate-like, patchboard 4-2 makes with insulating material, moving contact fixed disk 4-5 is the garden plate-like, it is made with insulating material, have hole, three gardens with the level on it, corresponding with fixed contact 5 positions, three are short garden column contact 4-4 with the level and are installed on respectively in the hole, garden of moving contact fixed disk 4-5, three stage clip 4-3 also are placed in respectively in the hole, garden of moving contact fixed disk 4-5, patchboard 4-2 and moving contact fixed disk 4-5 combine the termination that is fixed on fixed cover 3 with hold-down screw 12, the inserted-link type plug of Zu Chenging is placed in the hole, garden in shell 11 left sides like this, and three contact 4-4 are corresponding with fixed contact 5.On the shell 11 of inserted-link type plug downside, have hole, thin garden, thin hole, garden communicates with cavity, settle interlock in the hole, described interlock is mainly by screw 2, stage clip 13, drive link 14, spacer pin 16 is formed, drive link 14 usefulness insulating material are made, its profile is thin garden bar, drive link 14 is inserted in the hole, thin garden, one corrects with the button of control switch 7 and links to each other, and controls closing of control switch 7 by drive link 14, and its head also has a spacer pin 16, the other end suit of drive link 14 stage clip 13, the end of drive link 14 is pushed down with screw 2, and during operate as normal, screw 2 withstands drive link 14 all the time.The annexation of electric device is: cable is received on the patch bay 9 through line introducing device 8, two contacts on it go between respectively and receive on the input of control switch 7, on the fixed contact 5 of an output of control switch 7 through receiving a side behind the PTC device, another output on the control switch 7 is received on the fixed contact 5 of opposite side, the lead-in wire of controlled electric appliance is introduced on two terminal screw 4-1 of the both sides of receiving moving contact 4 through control introducing device 1, the middle direct ground connection of terminal screw 4-1.

During work, circuit is connected working properly, and as the controlled electric appliance overload, the PTC device is " pass " state, and controlled electric appliance quits work.In the time of need overhauling as controlled electric appliance, screw 2 is unclamped, stage clip 13 promotes drive link 14 and is moved to the left, control switch 7 actions, and two-phase is cut off entirely, can overhaul.

Claims (4)

1, the explosion-proof on-off device of a kind of inserted-link type, it is characterized in that: include a shell 11, open-ended cavity is arranged on it, bottom is fixed with control switch 7 in it, be fixed with patch bay 9 and PTC device 6 on the control switch 7 respectively, the cavity right openings is sealed with loam cake 10, housing has the garden columnar projections of mesopore respectively in both sides about in the of 11, be fixed with line introducing device 8 and line ejector 15 in it respectively, there is a projection in shell 11 left sides, along continuous straight runs has the hole, garden on it, there is a midfeather to separate with cavity, three fixed contacts 5 in die casting on the midfeather, hole, garden, shell 11 left side internal fixation one inserted-link type plug, described inserted-link type plug is mainly by fixed cover 3, control introducing device 1, moving contact 4 is formed, be on the distolateral wall of fixed cover 3 of garden tubulose flange is arranged, control introducing device 1 is installed in the end hole, other end termination is screwed moving contact 4, moving contact 4 has three contacts corresponding with three fixed contacts 5, having hole, thin garden on the shell 11 of inserted-link type plug downside is communicated with cavity, settle interlock in the hole, described interlock is by screw 2, stage clip 13, drive link 14, spacer pin 16 is formed, the drive link 14 that profile is thin rod shape is inserted in the hole, thin garden, one corrects with control place on the control switch 7 and links to each other, its head has spacer pin 16, other end suit stage clip 13, the end is pushed down with screw 2, two contacts on the patch bay 9 are linked on two inputs on the control switch 7 with lead, one of them output is received through the PTC device on the fixed contact 5 of a side, and another output is directly received on the fixed contact 5 of opposite side.

2, the explosion-proof on-off device of inserted-link type according to claim 1, it is characterized in that: described line introducing device 8, line ejector 15, control introducing device 1 structure are identical, all chew and form by sealing ring, jam, packing ring and wiring, sealing ring, jam, packing ring in the load hole, chew axial location with wiring in turn.

3, the explosion-proof on-off device of inserted-link type according to claim 1 is characterized in that: described three fixed contacts 5 are on the same straight line, and middle contact is in the center in hole, garden, shell 11 left side, contact in the middle of two contacts of both sides are symmetrical in.

4, the explosion-proof on-off device of inserted-link type according to claim 1, it is characterized in that: described moving contact 5 is mainly by terminal screw 4-1, patchboard 4-2, stage clip 4-3, moving contact fixed disk 4-5, contact 4-4 forms, three terminal screw 4-1 are that die casting is on the plate-like patchboard 4-2 of garden, its position is corresponding with three fixed contacts 5, moving contact fixed disk 4-5 is the garden plate-like, it is corresponding with terminal screw 4-1 position to have hole, three band step gardens on it, three contact 4-4 that are short garden cornice step are installed on respectively in the hole of moving contact fixed disk 4-5, three stage clip 4-3 also are placed in respectively in the hole of moving contact fixed disk 4-5, and patchboard 4-2 combines into moving contact 5 with the moving contact fixed disk.

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