A high-power DC contactor

Abstract

The application relates to the field of contactor devices, in particular to a high-power DC contactor. The high-power DC contactor comprises a moving and static contact assembly, a guide seat arranged above a moving iron core assembly, an inner support cover above the guide seat, and a mounting space arranged between the guide seat and the inner support cover; the mounting space comprises a concave moving contact arranged on the guide seat, a magnetic steel group arranged on the inner support cover, and two static contacts; during mounting, the first, second and third magnetic steels are arranged in the same plane and parallel to each other to ensure the stability of the magnetic field; since the first and third magnetic steels are located on the outer sides and the second magnetic steel is located between the first and third magnetic steels, the magnetic field generated between the first and third magnetic steels can be effectively increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of contactor device, in particular to a kind of high-power direct current contactor. BACKGROUND

[0002] Contactor is applied to electric power, power distribution and power consumption occasion.Contactor is generally used in industrial electricity to make contact closed by using the magnetic field generated by the current flowing through the coil, so as to control the load.

[0003] The following shortcomings exist in the process of using the current 500A energy storage contactor: 1, due to the large volume of the product, the two magnetic steels on the outside of the inner support cover are far away from each other, the magnetic field strength is weak, and the magnetic arc blowing ability is poor; 2, high and low voltage is not effectively separated, the creepage distance and electrical clearance are small, and there is a risk of high and low voltage breakdown during work; 3, the inner wall of the working cavity is a plastic part, which has low structural strength, poor heat conduction ability and weak arc extinguishing ability, and is easy to deform at high temperature; 4, there is no stable and effective feedback system that can be monitored in real time; 5, the contact has polarity distinction, and the reverse working life is poor. SUMMARY

[0004] The purpose of the present application is to establish a stable magnetic field strength, and to enhance the magnetic field strength, with high and low voltage separation, high life and no polarity.

[0005] The technical scheme of the present application is as follows:

[0006] A kind of high-power direct current contactor, including base, the dynamic iron core assembly arranged below in base and the dynamic and static contact assembly arranged above in base;The dynamic and static contact assembly includes the guide seat arranged above the dynamic iron core assembly, the inner support cover above the guide seat, and the installation space arranged between the guide seat and the inner support cover;The installation space includes the concave dynamic contact arranged on the guide seat, the magnetic steel group arranged on the inner support cover and two static contacts.

[0007] The magnetic steel group includes first magnetic steel, second magnetic steel and third magnetic steel arranged in order from left to right.

[0008] The dynamic contact is composed of vertical part at both ends and horizontal part connecting the bottom ends of the two vertical parts;The two static contacts correspond to the vertical parts one by one.

[0009] The inner support cover is respectively provided with first cavity, second cavity and third cavity in the center;The inner support cover outside the first cavity and the third cavity forms a boss, and the boss is provided with a containing groove for accommodating the magnetic steel;The second cavity is provided with a compartment for accommodating the second magnetic steel in the center;The first cavity and the third cavity are provided with first through holes for inserting the static contacts in the center.

[0010] The guiding seat is centrally provided with a first mounting groove, and outer containing grooves are arranged on both sides of the first mounting groove; a second through hole is arranged in the center of the first mounting groove; two ceramic sheets are oppositely arranged in the first mounting groove on both sides of the second through hole.

[0011] The moving iron core assembly sequentially comprises a linkage rod, a moving iron core, a shaft bushing, a coil and an outer iron core from inside to outside; the moving iron core is sleeved on the bottom end of the linkage rod.

[0012] A bracket is arranged on the linkage rod above the moving contact; a micro switch used in cooperation with the bracket is arranged on an inner support cover above the bracket.

[0013] The high-low pressure separation assembly comprises two first bosses arranged on the guiding seat at the rear end of the bracket and two second bosses arranged on the top surface of the framework below the guiding seat; the first bosses and the second bosses correspond to each other, the first bosses are each provided with a first mounting hole, and the second bosses are each provided with a second mounting hole; an annular upper cover is arranged in the outer cover above the inner support cover, and the upper cover is uniformly provided with at least two horizontal rods and a vertical rod; a third mounting hole is arranged at the intersection of the horizontal rod and the vertical rod at the rear end, a first partition plate is arranged on the top surface of the horizontal rod at the front end, and a second partition plate is arranged on the top surface of the vertical rod at the front end.

[0014] The framework in the contactor is oppositely provided with two first screw holes, the guiding seat is provided with a gap slot, and the inner support cover is oppositely provided with two second screw holes; the first screw holes correspond to the second screw holes.

[0015] The beneficial effects of the present application are: during installation, the first, second and third magnetic steels are located in the same plane and arranged in parallel to ensure the stability of the magnetic field; since the first and third magnetic steels are located on the outer side and the second magnetic steel is located between them, the magnetic field generated between the first and third magnetic steels can be effectively increased; at the same time, the polarity direction of the magnetic steel makes the arc draw to both sides, when the positive pole of the current is connected to the left static contact, the magnetic arc blows upward, when the negative pole of the current is connected to the left static contact, the magnetic arc blows downward, and the square ceramic sheets are symmetrically arranged upward and downward, the arc extinguishing effect is the same, the product is not affected by the positive and negative directions of the current, and the polarity of the product is realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] The foregoing and other objects, features and advantages of the present application will become apparent from the following detailed description, taken in conjunction with the accompanying drawings.

[0017] Wherein: Figure 1 It is a structural schematic diagram of the present application;

[0018] Figure 2 It is a structural schematic diagram of the guiding seat of the present application;

[0019] Figure 3 It is a structural schematic diagram of the inner support cover of the present application;

[0020] Figure 4 Fig. 1 is a schematic diagram of linkage rod structure of the present application;

[0021] Figure 5 Fig. 2 is a schematic diagram of insertion rod structure of the present application

[0022] Figure 6 Fig. 3 is a schematic diagram of second boss structure of the present application;

[0023] Figure 7 Fig. 4 is a schematic diagram of three-dimensional structure of the present application;

[0024] In the drawings, 1 is a base, 2 is a moving iron core assembly, 3 is a moving and static contact assembly, 5 is a support, 6 is a micro switch, 7 is a clamping plate, 8 is a contact rod, 9 is a first screw hole, and 10 is a second screw hole.

[0025] 2.1 is a linkage rod, 2.2 is a moving iron core, 2.3 is a shaft bushing, 2.4 is a coil, and 2.5 is an outer iron core.

[0026] 3.1 is a guide seat, 3.2 is an inner support cover, 3.3 is a moving contact, 3.4 is a static contact, 3.5 is a first magnetic steel, 3.6 is a second magnetic steel, 3.7 is a third magnetic steel, 3.8 is a vertical part, 3.9 is a horizontal part, 3.10 is a marking groove, 3.11 is a first cavity, 3.12 is a second cavity, 3.13 is a third cavity, 3.14 is a containing groove, 3.15 is a compartment, 3.17 is a first mounting groove, 3.18 is an outer containing groove, 3.19 is a second through hole, 3.20 is a ceramic sheet, and 3.22 is a convex strip.

[0027] 4.1 is a first boss, 4.2 is a second boss, 4.3 is a first mounting hole, 4.4 is a second mounting hole, 4.5 is an upper cover, 4.6 is a horizontal rod, 4.7 is a vertical rod, 4.8 is a third mounting hole, 4.9 is a first partition plate, 4.10 is a second partition plate, 4.11 is a jack, and 4.12 is a connecting partition plate. DETAILED DESCRIPTION

[0028] Referring to Figure 1 Fig. 1 is a schematic diagram of linkage rod structure of the present application;

[0029] The magnetic steel group comprises the first magnetic steel 3.5, the second magnetic steel 3.5 and the third magnetic steel 3.7 arranged in sequence from left to right. The first, second and third magnetic steels are arranged in the same plane and parallel to each other to ensure the stability of the magnetic field. Since the first and third magnetic steels are located on the outer side and the second magnetic steel is located between the first and third magnetic steels, the magnetic field generated between the first and third magnetic steels can be effectively increased. Meanwhile, the polarity direction of the magnetic steel is such that the arc is pulled to both sides. When the positive pole of the current is connected to the left static contact, the magnetic arc is blown upward. When the negative pole of the current is connected to the left static contact, the magnetic arc is blown downward. The square ceramic sheet is symmetrical upward and downward, and the arc extinguishing effect is the same. The product is not affected by the positive and negative directions of the current, and the polarity of the product is realized.

[0030] The moving contact is composed of vertical parts 3.8 at both ends and a horizontal part 3.9 connecting the bottom ends of the vertical parts. The two static contacts correspond to the vertical parts one by one. In the installation, the vertical part at one end is located between the first and second magnetic steels, and the vertical part at the other end is located between the second and third magnetic steels.

[0031] The same side of the first, second and third magnetic steels is provided with a marking groove 3.10. The N and S poles are distinguished by the groove. The side of the first, second and third magnetic steels with the marking groove is the N pole, and the other side of the first, second and third magnetic steels is the S pole.

[0032] The central part of the inner support cover is respectively provided with a first cavity 3.11, a second cavity 3.12 and a third cavity 3.13. The outer side of the first cavity and the third cavity of the inner support cover forms a boss, and the boss is provided with a containing groove 3.14 for containing the magnetic steel. The central part of the second cavity is provided with a compartment 3.15 for containing the second magnetic steel. The central part of the first cavity and the third cavity is provided with a first through hole for inserting the static contact. The magnetic steels are separately installed to facilitate the formation of the magnetic field and cooperate with the moving contact on the guide seat.

[0033] The central part of the guide seat is provided with a first installation groove 3.17, and the two sides of the first installation groove are provided with outer containing grooves 3.18. The central part of the first installation groove is provided with a second through hole 3.19, and the front end and the rear end of the second through hole are respectively provided with a front cavity and a rear cavity. The two ceramic sheets 3.20 are arranged opposite to each other in the first installation groove on both sides of the second through hole. The moving contact is arranged between the arc extinguishing ceramic sheets and can move up and down through the linkage rod penetrating the guide seat. The outer containing groove corresponds to the containing groove of the boss of the inner support cover, which is convenient for the subsequent assembly of the magnetic steel. The second through hole is convenient for the linkage rod penetrating and installing. Since the first and second cavities of the inner support cover correspond to the ceramic sheets, the ceramic sheets have a good arc extinguishing effect.

[0034] The front end face and the rear end face of the ceramic sheet are respectively provided with a convex strip 3.22. The convex strip extends from the top to the bottom of the end face of the ceramic sheet, which has a good arc extinguishing effect. Preferably, the ceramic sheet adopts a rectangular structure for easy installation.

[0035] The moving iron core assembly comprises, from inside to outside, a linkage rod 2.1, a moving iron core 2.2, a shaft bushing 2.3, a coil 2.4, and an outer iron core 2.5; the moving iron core is sleeved on the bottom end of the linkage rod. The magnetic field is formed by the cooperation of the moving iron core, the shaft bushing, the coil, and the outer iron core, and the moving iron core is driven to move up and down, which drives the linkage rod to move up and down, and thus drives the moving contact at the top end of the linkage rod to move up and down.

[0036] The high and low voltage separation assembly comprises two first bosses 4.1 arranged on the guide seat at the rear end of the bracket, and two second bosses 4.2 arranged on the top surface of the skeleton below the guide seat; the first bosses and the second bosses correspond to each other, and each of the first bosses is provided with a first mounting hole 4.3, and each of the second bosses is provided with a second mounting hole 4.4; an annular upper cover 4.5 is arranged on the outer cover above the inner support cover, and at least two horizontal rods 4.6 and vertical rods 4.7 are uniformly arranged on the upper cover; a third mounting hole 4.8 is arranged at the intersection of the horizontal rod and the vertical rod at the rear end, a first partition plate 4.9 is arranged on the top surface of the horizontal rod at the front end, and a second partition plate 4.10 is arranged on the top surface of the vertical rod at the front end. Two low-voltage insertion rods of the contactor coil are sequentially inserted into the second bosses and the first bosses, and since the first bosses and the second bosses are both cavity structures of plastic parts enclosed on the periphery, the low-voltage insertion rods can be effectively separated from the high voltage of the moving contact of the contactor, and the safety is higher; the third mounting hole cooperates with the mounting rod to arrange the upper cover between the outer cover and the inner support cover, the first partition plate is arranged on the horizontal rod at the front end, and the first partition plate separates the high-voltage area of the static contact from the low-voltage area of the coil; the second partition plate is arranged at the front end of the vertical rod to separate the two static contacts in the high-voltage area.

[0037] The inner support sleeve at the top of the guide seat is provided with insertion holes 4.11 at positions corresponding to the first bosses. The insertion holes are arranged to facilitate installation.

[0038] The outer cover comprises a bottom plate, a top plate, and a connecting partition plate 4.12 connecting the bottom plate and the top plate. Since the static contacts are arranged on the bottom plates on both sides of the partition plate, the arrangement of the connecting partition plate can effectively separate the exposed parts of the two static contacts extending out of the bottom plate, and cooperates with the second partition plate to achieve better separation effect.

[0039] The linkage rod above the moving contact is provided with a bracket 5, and the inner support cover above the bracket is provided with a micro switch 6; the bracket comprises a horizontal rod, the bottom surface of the horizontal rod is provided with two clamping plates 7, and the other end of the horizontal rod is provided with a contact rod 8. Since the bracket is connected with the linkage rod, the up and down movement of the linkage rod will drive the bracket to move up and down, and the up and down movement of the linkage rod will drive the bracket to move up and down, and the micro switch above the bracket is synchronously touched; when the moving contact and the static contact are closed, the micro switch inputs a conduction signal; when the moving contact and the static contact are disconnected, the micro switch inputs a non-conduction signal.

[0040] The skeleton in the contactor is oppositely provided with two first screw holes 9, the guide seat is provided with a clearance slot, and the inner support cover is oppositely provided with two second screw holes 10; the first screw hole corresponds to the second screw hole one by one. The bolt is used in cooperation with the first screw rod and the second screw rod.

[0041] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A high power DC contactor comprising a base, a moving core assembly disposed below in the base and a moving and stationary contact assembly disposed above in the base; characterized in that, The movable contact assembly comprises a guide seat arranged above the movable iron core assembly, an inner support cover above the guide seat, and a mounting space arranged between the guide seat and the inner support cover; the mounting space comprises a concave movable contact arranged on the guide seat, a magnetic steel group arranged on the inner support cover, and two static contacts; the movable iron core assembly comprises, from inside to outside, a linkage rod, a movable iron core, a shaft bushing, a coil, and an outer iron core; the movable iron core is sleeved on the bottom end of the linkage rod; a bracket is arranged on the linkage rod above the movable contact; a micro switch is arranged on the inner support cover above the bracket; the high-low voltage separation assembly comprises two first bosses arranged on the guide seat at the rear end of the bracket, and two second bosses arranged on the top surface of the framework below the guide seat; the first bosses and the second bosses correspond to each other, and the first bosses are each provided with a first mounting hole, and the second bosses are each provided with a second mounting hole; an annular upper cover is arranged in the outer cover above the inner support cover, and the upper cover is uniformly provided with at least two horizontal rods and a vertical rod; a third mounting hole is arranged at the intersection of the rear end of the horizontal rod and the vertical rod, a first partition plate is arranged on the top surface of the front end of the horizontal rod, and a second partition plate is arranged on the top surface of the front end of the vertical rod.

2. A high power DC contactor according to claim 1, characterized in that The magnetic steel group comprises a first magnetic steel, a second magnetic steel, and a third magnetic steel arranged from left to right.

3. A high power DC contactor as claimed in claim 1, wherein, The movable contact is composed of vertical parts at both ends and a horizontal part connecting the bottom ends of the two vertical parts; the two static contacts correspond to the vertical parts one by one.

4. A high power DC contactor as claimed in claim 1, wherein, The inner support cover is respectively provided with a first cavity, a second cavity, and a third cavity in the center; the inner support cover outside the first cavity and the third cavity forms a boss, and the boss is provided with a magnetic steel accommodating groove; the second cavity is provided with a compartment accommodating the second magnetic steel in the center; the first cavity and the third cavity are provided with a first through hole in the center for the static contact to be inserted.

5. A high power DC contactor as claimed in claim 1, wherein, The guide seat is provided with a first mounting groove in the center, and an outer accommodating groove is arranged on both sides of the first mounting groove; the first mounting groove is provided with a second through hole in the center; two ceramic sheets are arranged opposite to each other in the first mounting groove on both sides of the second through hole.

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