CN209962969U - High-voltage isolated DC contactor - Google Patents

Abstract

The utility model discloses a direct current contactor of high pressure isolation relates to the contactor, aims at solving current contactor, has the problem that the ware switches on the influence result of use outward between the input of its static contact, the output, and its technical scheme main points are: the contactor comprises a shell, a contactor body arranged in the shell and a coil used for starting a power generator, wherein the contactor body comprises a static contact, the static contact comprises two separated sub-contacts, two conductive screws penetrate through and are fixed on the shell from inside to outside, the two conductive screws are respectively fixed on the two sub-contacts, and an insulating isolation cover is respectively covered at one end, outside the shell, of each conductive screw. The utility model discloses a direct current contactor of high pressure isolation, it transships and keeps apart each other between the end to the result of use is better.

Description

High-voltage isolated DC contactor

Technical Field

The utility model relates to a contactor, more specifically say, it relates to a direct current contactor of high pressure isolation.

Background

The direct current contactor is a contactor used in a direct current loop, is suitable for a programmable power supply or an uninterruptible power supply system, and is applied to the fields of a plurality of new energy resources such as forklifts, electric automobiles and movable electric charging piles.

During the use, after the contactor coil circular telegram, coil current produced the magnetic field, made quiet iron core produce electromagnetic attraction and attract and move the iron core to drive the push rod and remove, make movable contact and stationary contact: at the moment, the normally closed contact is opened, the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released under the action of the release spring to restore the static contact: the normally open contact is open and the normally closed contact is closed.

In the using process of the contactor, the input end and the output end of the static contact are influenced by the using environment, and the problem of conducting outside the contactor exists, so that the normal using effect of the contactor is influenced, and therefore a new scheme needs to be provided to solve the problem.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a direct current contactor that high pressure was kept apart, mutual isolation between the input of its static contact, the output to the result of use is better.

The above technical purpose of the present invention can be achieved by the following technical solutions: the high-voltage isolated direct-current contactor comprises a shell, a contactor body arranged in the shell and a coil used for starting a power generator, wherein the contactor body comprises a static contact, the static contact comprises two separated sub-contacts, two conductive screws penetrate through and are fixed on the shell from inside to outside, the two conductive screws are respectively fixed on the two sub-contacts, and an insulating isolation cover is respectively covered at one end, outside the shell, of each conductive screw.

By adopting the technical scheme, the input end and the output end of the static contact of the utility model extend out of the shell through the conductive screws so as to be connected with corresponding wires for use; because two conductive screws are arranged at one end outside the shell and are separated by two insulated isolation covers, the problem of direct conduction outside the contactor can be effectively reduced, and the normal use effect of the contactor is ensured.

The utility model discloses further set up to: an insulating isolation plate is arranged between the two isolation covers.

Through adopting above-mentioned technical scheme, can utilize the division board to increase the creepage distance between two conductive screw to strengthen the isolation effect between two conductive screw.

The utility model discloses further set up to: and isolation cavities are respectively formed between the isolation plate and the two isolation covers.

Through adopting above-mentioned technical scheme, can utilize to keep apart the chamber and hinder the creepage as the arc extinguishing chamber to further strengthen the isolation effect.

The utility model discloses further set up to: the isolation plate is fixed on the shell, a slot is formed in the isolation plate, a matched insert block is inserted in the slot, one end, far away from the shell, of the insert block extends out of the slot, and the two isolation covers are connected and fixed at the same time.

By adopting the technical scheme, the two isolation covers are connected into a whole through the same inserting block, so that the isolation covers are more convenient to install and fix.

The utility model discloses further set up to: the both sides of division board are provided with the current conducting plate respectively, and two current conducting plates are worn to establish respectively by two conductive screw, two the current conducting plate extends towards the side of keeping away from mutually, and just the side of keeping away from mutually is fixed with the binding screw respectively.

Through adopting above-mentioned technical scheme, conductive screw passes through the current conducting plate conduction, and the terminal screw that its one end was kept away from to the rethread current conducting plate comes the actual line, and these two line ends actual distance of contactor is bigger relatively this moment, thereby the utility model discloses a high pressure is kept apart the effect better.

The utility model discloses further set up to: the binding screw penetrates through the conductive plate, and the end side of the binding screw is connected with a matched nut through threads.

Through adopting above-mentioned technical scheme, the staff can rotate the nut, and it is fixed to utilize nut cooperation current conducting plate centre gripping with the line, thereby the utility model discloses the wiring is more convenient.

The utility model discloses further set up to: an arc extinguishing cover is arranged in the shell, and one end, far away from the conductive screw, of each branch contact penetrates into the arc extinguishing cover.

Through adopting above-mentioned technical scheme, can utilize the arc-extinguishing cover to do the arc extinguishing to handling to the electric arc that produces when the contact cut-off, prevent that it from haring electrical apparatus, and prevent that it from normally switching on two branch contacts to guarantee the result of use.

The utility model discloses further set up to: the housing is filled with an inert gas.

Through adopting above-mentioned technical scheme, can utilize inert gas to do the protection to the contactor main part in the casing, reduce its oxidation probability, improve the utility model discloses a life.

To sum up, the utility model discloses following beneficial effect has: the static contact includes two branch contacts, and the one end that divides the contact to extend to outside the casing covers respectively and is equipped with insulating cage to do high-voltage isolation to both, prevent that its ware is direct to be switched on outward and disturb the result of use.

Drawings

FIG. 1 is a schematic longitudinal cross-sectional view of the present invention;

fig. 2 is a schematic longitudinal sectional view of a contactor body according to the present invention;

fig. 3 is a schematic longitudinal sectional view of the coil of the present invention.

In the figure: 1. a housing; 101. a separator plate; 1011. a slot; 1012. inserting a block; 11. a box body; 12. a cover plate; 2. a contactor body; 20. a coil; 201. winding a bobbin; 202. a wire loop; 21. static contact; 22. a moving contact; 211. a contact is separated; 23. a push rod; 24. a movable iron core; 25. a stationary iron core; 26. releasing the spring; 27. a return spring; 28. an arc extinguishing chamber; 31. a conductive screw; 32. an isolation cover; 34. a conductive plate; 35. a binding screw; 36. a nut; 4. an energy-saving circuit board; 5. a shield case; 501. a clamping block; 502. a card interface; 51. installing a cavity; 52. air holes; 53. and fastening the bolt.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

A high voltage isolated dc contactor, referring to fig. 1, includes a case 1 and fig. 2, a contactor body 2 disposed in the case 1, a coil 20 serving as a starting power generator, and an energy saving circuit board 4.

The casing 1 is made of plastic and comprises a square box body 11, one end of an inner cavity of the box body 11 is of an open structure, and a cover plate 12 which is matched with the box body is fixed at the opening through bolts.

The contactor main body 2 includes a fixed contact 21, the fixed contact 21 includes two sub-contacts 211, and the two sub-contacts 211 are fixed on the inner side of the cover plate 12 and are distributed in a transverse symmetrical manner. Two conductive screws 31 are fixedly arranged on the cover plate 12 from outside to inside in a penetrating way, and the two conductive screws 31 are respectively connected with the two branch contacts 211 in a threaded way and are used for fixing the branch contacts 211 and facilitating external wiring of the device.

In order to prevent the two conductive screws 31 from being conducted outside the contactor to influence the normal use effect of the contactor in the use process, two isolation covers 32 which respectively cover the heads of the two conductive screws 31 are arranged outside the cover plate 12, and the isolation covers 32 are insulated and can be made of plastic.

Referring to fig. 1, an insulating isolation plate 101 is disposed between two isolation covers 32, and the isolation plate 101 may be disposed to increase a creepage distance between heads of two conductive screws 31 to improve an isolation effect. The isolation plate 101 also penetrates into the housing 1 and separates the two sub-contacts 211, so as to prevent the two sub-contacts from being directly conducted to influence the use effect. Isolation cavities are formed between the isolation plate 101 and the two isolation covers 32, and the existence of the isolation cavities can further prevent the arc from conducting the two conductive screws 31.

Referring to fig. 1 and 2, a slot 1011 is formed in the isolation plate 101, and the side of the slot 1011 away from the cover plate 12 is an open structure; a matched plug block 1012 is inserted into the slot 1011, and the plug block 1012 extends out from the port of the slot 1011 and transversely extends to be fixed on the two isolation covers 32, so that the two isolation covers 32 are connected into a whole to be convenient to detach.

Referring to fig. 1, conductive plates 34 are disposed on both sides of the isolation plate 101, and a conductive screw 31 is inserted into the cap plate 12 after passing through the conductive plate 34. The two conductive plates 34 extend toward each other toward the opposite sides, and a terminal screw 35 is fixed to each of the opposite ends.

During the use, the staff connects the wire in binding screw 35, and the interval between two wiring ends is bigger relatively this moment to it is better to keep apart the effect.

To facilitate wiring, a binding screw 35 penetrates the conductive plate 34 and penetrates an end-threaded fitting nut 36. The operator can now clamp the connecting wires to the plate 34 by means of the nuts 36.

Referring to fig. 1 and 2, the contactor main body 2 further includes a movable contact 22 located right below the fixed contact 21, the movable contact 22 is plate-shaped, and a vertical projection connects vertical projections of the two sub-contacts 211. A push rod 23 is fixed on the movable contact 22, the push rod 23 extends towards one side far away from the fixed contact 21, and a movable iron core 24 is fixed at the end.

The coil 20 is fixed on the bottom surface of the inner cavity of the case 11 (as shown in the figure), and includes a bobbin 201 and a wire loop 202, wherein the bobbin 201 has an i-shaped longitudinal section, and a wire is wound around the middle of the bobbin 201 to form the wire loop 202. The middle part of the winding framework 201 is hollow to form a sliding groove, and the movable iron core 24 is connected in the sliding groove in a sliding mode, so that the utilization rate of magnetic flux is improved.

A stationary core 25 is disposed between the movable core 24 and the movable contact 22, a lower portion of the stationary core 25 is inserted into a sliding groove formed in a middle portion of the bobbin 201, and an upper portion thereof extends in a lateral direction along an upper portion (shown in the drawing) of the bobbin 201. The push rod 23 is inserted through and connected to the static iron core 25 in a sliding manner.

When the coil 20 is energized to generate a magnetic field, the movable iron core 24 is attracted by the static iron core 25, and simultaneously drives the push rod 23 to move upwards, the push rod 23 drives the movable contact 22 to move upwards to abut against the two sub-contacts 211, and at this time, the contactor is closed.

In order to ensure the normal function of the product by timely resetting the push rod 23, a return spring 27 is sleeved on the push rod 23, one end of the return spring 27 fixes the static iron core 25, and the other end of the return spring abuts against the movable iron core 24. The push rod 23 is also sleeved with a release spring 26, one end of the release spring 26 is fixed on the mounting block on the push rod 23, and the other end is fixedly connected with the movable contact 22; the movable contact 22 is also arranged to slide along the push rod 23, so as to damp and weaken the reaction force applied when the movable contact 22 strikes the fixed contact 21.

Referring to fig. 1, energy-conserving circuit board 4 sets up in the inner chamber of box body 11, and the adherence setting, thereby the utility model discloses an integrated level is higher.

In order to protect the contactor main body 2 and the electronic components of the energy-saving circuit board 4 from oxidation, an inert gas is filled in the box body 11 as a shielding gas.

Referring to fig. 1, in order to prevent the arc generated when the contactor is opened and closed from damaging the energy-saving circuit board 4 and affecting the normal use effect of the contactor main body 2, an arc extinguishing chamber 28 is arranged in the box body 11; the static contact 21 and the movable contact 22 are both arranged in the arc extinguishing cover 28; the lower end of the sub-contact 211 penetrates into the arc extinguishing chamber 28; arc chute 28 may be made of an arc resistant ceramic. The energy-saving circuit board 4 is disposed outside the arc-extinguishing chamber 28, thereby preventing the arc from interfering therewith.

Referring to fig. 1, in order to reduce interference of a magnetic field generated in the use process of the contactor on a circuit on an energy-saving circuit board 4, a shielding case 5 is covered on the energy-saving circuit board 4, and an inner cavity of the shielding case 5 is an installation cavity 51 which is of a lower opening structure; the shield 5 may alternatively be made of a conductive wire mesh coated plastic. In order to ensure that the inert gas can protect the energy-saving circuit board 4, the shielding cover 5 is provided with an air hole 52 for communicating the inner cavity of the shell 1 with the mounting cavity 51.

Referring to fig. 1 and 3, the upper portion of the bobbin 201 transversely extends to the lower portion of the energy-saving circuit board 4, two clamping blocks 501 are fixedly connected to the upper portion of the bobbin, the two clamping blocks 501 are inserted into the lower portion of the energy-saving circuit board 4, and the two clamping blocks 501 are abutted to achieve primary fixing.

A clamping interface 502 is formed in the clamping block 501, and a side wall plate of the shielding case 5 is inserted into the clamping interface 502, so that the shielding case 5 is preliminarily fixed.

In order to improve the fixing effect of the energy-saving circuit board 4 and the shielding case 5, a fastening bolt 53 is connected to the clamping block 501 close to the center side of the housing 1 in a threaded manner, and the screw end of the fastening bolt 53 penetrates through the shielding case 5 and the lower part of the energy-saving circuit board 4 for reinforcing and fixing. The fastening bolt 53 is an insulating bolt, and can be made of plastic to prevent the conductive interference with the use effect of the shielding case 5 and the energy-saving circuit board 4.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A high-voltage isolated DC contactor, comprising a housing (1), a contactor body (2) disposed in the housing (1), and a coil (20) used as a starting power generator, the contactor body (2) including a stationary contact (21), characterized in that: the static contact (21) comprises two separated sub-contacts (211), two conductive screws (31) are fixedly arranged in the shell (1) in a penetrating mode from inside to outside, the two conductive screws (31) are respectively fixed to the two sub-contacts (211), and an insulating isolation cover (32) is respectively covered at one end, outside the shell (1), of each conductive screw (31).

2. The high voltage isolated dc contactor of claim 1, wherein: an insulating isolation plate (101) is arranged between the two isolation covers (32).

3. The high voltage isolated dc contactor of claim 2, wherein: and isolation cavities are respectively formed between the isolation plate (101) and the two isolation covers (32).

4. The high voltage isolated dc contactor of claim 2, wherein: the utility model discloses a novel isolation cover, including baffle (101), casing (1), slot (1011) have been seted up on baffle (101), it has agreeable inserted block (1012) to peg graft in slot (1011), the one end that casing (1) was kept away from in inserted block (1012) stretches out slot (1011) to connect two fixed cage (32) simultaneously.

5. The high voltage isolated dc contactor of claim 2, wherein: the two sides of the isolation plate (101) are respectively provided with a conductive plate (34), the two conductive screws (31) respectively penetrate through the two conductive plates (34), the two conductive plates (34) extend towards the opposite sides, and the opposite sides are respectively fixed with wiring screws (35).

6. The high voltage isolated dc contactor of claim 5, wherein: the terminal screw (35) penetrates the conductor plate (34), and the end side of the penetration is connected with a matched nut (36) in a threaded mode.

7. The high voltage isolated dc contactor of claim 1, wherein: an arc-extinguishing cover (28) is arranged in the shell (1), and one end, far away from the conductive screw (31), of the two sub-contacts (211) penetrates into the arc-extinguishing cover (28).

8. The high voltage isolated dc contactor of claim 7, wherein: and the shell (1) is filled with inert gas.

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