CN109473317B - High-voltage direct-current relay with magnetic steel arc extinction function - Google Patents
High-voltage direct-current relay with magnetic steel arc extinction function Download PDFInfo
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- CN109473317B CN109473317B CN201811374945.4A CN201811374945A CN109473317B CN 109473317 B CN109473317 B CN 109473317B CN 201811374945 A CN201811374945 A CN 201811374945A CN 109473317 B CN109473317 B CN 109473317B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 230000008033 biological extinction Effects 0.000 title claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000009413 insulation Methods 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010891 electric arc Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
- H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
- H01H50/641—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a high-voltage direct-current relay with magnetic steel arc extinction, which comprises a cover body, two fixed contacts, a movable contact, a push rod assembly for pushing the movable contact to move and two magnetic steels, wherein the cover body is provided with a plurality of fixed contacts; the two pieces of magnetic steel are respectively arranged near the contacts, and the rotating directions of magnetic blowing forces at the contacts at the two ends of the movable contact piece around the center point of the movable contact piece are the same; in the two opposite first side walls of the cover body corresponding to the length of the movable contact piece, one first retaining wall along the vertical direction is respectively arranged on one side corresponding to the length of the movable contact piece, and at least one first retaining wall of the two first retaining walls is in micro clearance fit with the movable contact piece. On the one hand, the invention can ensure that enough space for cutting off the electric arc exists in the cavity and ensure that the movable contact of the movable contact piece is in good contact with the fixed contact of the fixed contact; on the other hand, the friction force in the moving process of the movable contact can be reduced, the creepage distance between the two fixed contacts is prolonged, and the pressure-resistant degree and the insulating effect of the product are improved.
Description
Technical Field
The invention relates to the technical field of direct current relays, in particular to a high-voltage direct current relay with a magnetic steel arc extinguishing function.
Background
A relay is an electronically controlled device having a control system (also known as an input loop) and a controlled system (also known as an output loop), commonly used in automatic control circuits, which in effect is an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching and the like.
The direct current relay is one of relays, a direct current relay in the prior art adopts a direct-acting type (also called a solenoid direct-acting type) scheme of a moving contact piece, a contact part of the direct current relay comprises two fixed contacts and a moving assembly, the moving assembly comprises a moving spring part and a pushing rod assembly, the moving spring part is composed of the moving contact piece and moving contacts at two ends of the moving contact piece, the moving contact piece is usually of a straight piece type, and the pushing rod assembly usually comprises a pushing rod for pushing the moving contact piece to move. The high-voltage direct-current relay is used as one of the direct-current relays, and generally needs to have better arc-extinguishing capability, wherein an arc-extinguishing mode is to adopt a cover body to accommodate a movable contact and a static contact in a cavity, and arrange magnetic steel for arc extinction outside the cavity, and realize arc extinction through magnetic blowing force formed by a magnetic field generated by the magnetic steel. The high-voltage direct-current relay with the magnetic steel arc extinction in the prior art mainly has the following defects:
1. The magnetic blowing force generated by the magnetic field generated by the magnetic steel can cause the movable contact to rotate, and the movable contact is close to the side wall of the cavity when rotating, so that the distance between the movable contact and the side wall of the cavity is too close to provide enough space for cutting off the electric arc;
2. when the movable contact piece rotates, if the rotation amplitude is too large, the problem of poor contact between the movable contact of the movable contact piece and the stationary contact of the stationary contact is easily caused;
3. When the movable contact piece rotates, the movable contact piece is easy to touch the side wall of the cavity, so that a larger friction force is formed when the movable contact piece moves vertically along with the pushing rod, and the performance stability of the relay is affected;
4. In the space of the cavity, when foreign matters are accumulated to a certain degree, the risks of insufficient pressure resistance and poor insulation of the product exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-voltage direct-current relay with the magnetic steel arc extinction, and on one hand, through structural improvement, the enough space for cutting off the arc in a cavity can be ensured, and good contact between a movable contact of a movable contact and a fixed contact of a fixed contact can be ensured; on the other hand, the friction force in the moving process of the movable contact can be reduced, the creepage distance between the two fixed contacts is prolonged, and the pressure-resistant degree and the insulating effect of the product are improved.
The technical scheme adopted for solving the technical problems is as follows: a high-voltage direct current relay with magnetic steel arc extinction comprises a cover body, two fixed contacts, a movable contact, a push rod component for pushing the movable contact to move and two magnetic steels; the cover body comprises a top wall and four side walls, and a cavity with a downward opening is formed by the top wall and the four side walls; the two fixed contacts respectively penetrate through the top wall of the cover body, the bottom ends of the two fixed contacts are positioned in the cavity, the movable contact is movably positioned in the cavity through the push rod assembly, and the movable contacts arranged at the two ends of the movable contact are respectively matched with the fixed contacts arranged at the bottom ends of the two fixed contacts, so that current flows in from one fixed contact, and flows out from the other fixed contact after passing through the movable contact; the two pieces of magnetic steel are respectively arranged near the contacts, and the rotating directions of magnetic blowing forces at the contacts at the two ends of the movable contact piece around the center point of the movable contact piece are the same; in the two opposite first side walls of the cover body corresponding to the length of the movable contact, a first retaining wall is respectively arranged on one side corresponding to the length of the movable contact, at least one of the two first retaining walls is in micro clearance fit with the movable contact, so that the movable contact is limited by the amplitude of rotation under the action of magnetic blowing force by using the at least one first retaining wall, and the movable contact can only collide with one of the first retaining walls when rotating, thereby ensuring enough space for cutting off electric arcs between the movable contact and the side wall of the cover body and increasing the creepage distance between the two fixed contacts.
The first retaining wall is arranged between the movable contact corresponding to one side of the length of the movable contact and the central line of the length of the movable contact.
When the polarity requirement is met for the connection of the two fixed contacts, and the current direction passing through the movable contact is fixed, one of the two first retaining walls is in micro clearance fit with the movable contact, and the one of the two first retaining walls is positioned in the first side wall corresponding to the front direction of the magnetic blowing force; or the two first retaining walls are in micro clearance fit with the movable contact piece.
When the connection of the two fixed contacts has no polarity requirement and the current direction passing through the movable contact is not fixed, the two first retaining walls are in micro clearance fit with the movable contact.
In the cover body two opposite first side walls corresponding to the length of the movable contact, one second retaining wall is respectively arranged on the other side corresponding to the length of the movable contact, and at least one second retaining wall of the two second retaining walls is in larger clearance fit with the movable contact, so that the movable contact can only collide with one first retaining wall when rotating, the creepage distance between the two fixed contacts is increased by utilizing the second retaining wall, and the pressure resistance and the insulation performance of the product are improved.
The second retaining wall is arranged between the movable contact corresponding to the other side of the length of the movable contact and the central line of the length of the movable contact.
When the polarity requirement is met for the connection of the two fixed contacts, and the current direction passing through the movable contact is fixed, one of the two second retaining walls is in larger clearance fit with the movable contact, and the one second retaining wall is positioned in the first side wall corresponding to the front direction of the magnetic blowing force; or the two second retaining walls are in larger clearance fit with the movable contact piece.
When the connection of the two fixed contacts has no polarity requirement and the current direction passing through the movable contact is not fixed, the two second retaining walls are in larger clearance fit with the movable contact.
The two magnetic steels are respectively arranged at the outer sides of the two ends corresponding to the length of the movable contact piece, the polarities of the two magnetic steels are distributed up and down, and the polarities of the two magnetic steels are arranged in opposite directions.
Compared with the prior art, the invention has the beneficial effects that:
1. The two pieces of magnetic steel are respectively arranged near the contacts, and the magnetic blowing forces at the contacts at the two ends of the movable contact piece can be the same in the rotation direction around the center point of the movable contact piece; in the two opposite first side walls of the cover body corresponding to the length of the movable contact piece, one first retaining wall along the vertical direction is respectively arranged on one side corresponding to the length of the movable contact piece, and at least one first retaining wall of the two first retaining walls is in micro clearance fit with the movable contact piece. The structure of the invention can limit the rotation amplitude of the movable contact sheet under the action of the magnetic blowing force by using the first retaining wall, so that the movable contact sheet can only collide with one of the first retaining walls when rotating, thereby preventing poor contact of the fixed contact caused by large rotation of the stop contact sheet, ensuring enough space for cutting off the electric arc between the movable contact sheet and the side wall of the cover body, and increasing the creepage distance between the two fixed contact sheets.
2. The invention adopts the structure that the two opposite first side walls of the cover body corresponding to the length of the movable contact piece are respectively provided with the second retaining wall along the vertical direction on the other side corresponding to the length of the movable contact piece, and at least one of the two second retaining walls is in larger clearance fit with the movable contact piece, so that the movable contact piece can only collide with one first retaining wall when rotating. The invention can utilize the added second retaining wall to play a role of blocking, so that pollutants in a left-right switching load area cannot be communicated, thereby improving the pressure resistance and the insulation property of the product.
3. According to the invention, the movable contact piece is limited by adopting the first retaining wall, and the movable contact piece can only touch one of the first retaining walls no matter how the movable contact piece rotates, so that the friction force of the movable contact piece when moving up and down along with the push rod assembly can be reduced.
4. According to the invention, as the first retaining wall is in micro clearance fit with the movable contact, and the second retaining wall is in larger clearance fit with the movable contact, the movable contact can only contact with one retaining wall when rotating, and a conductive channel is not easy to form between the two opposite-angle retaining walls.
The invention is described in further detail below with reference to the drawings and examples; the high-voltage direct-current relay with the magnetic steel arc extinction is not limited to the embodiment.
Drawings
FIG. 1 is a schematic view of a partial construction of an embodiment of the present invention;
FIG. 2 is a cross-sectional view in the bottom direction of an embodiment of the present invention;
fig. 3 is a cross-sectional view in the bottom view (left side static contact current in, right side static contact current out) of an embodiment of the present invention;
FIG. 4 is a schematic view of a bottom view of an embodiment of the present invention showing the arc breaking space (left side stationary contact current in, right side stationary contact current out);
Fig. 5 is a cross-sectional view in the bottom view (right side static contact current in, left side static contact current out) of an embodiment of the present invention;
FIG. 6 is a schematic view of a bottom view of an embodiment of the present invention showing the arc breaking space (right side stationary contact current in, left side stationary contact current out);
FIG. 7 is a schematic view of the movable contact and the retaining wall of the present invention (only two first retaining walls);
FIG. 8 is a schematic view of the movable contact of the present invention mated with the retaining wall (two first retaining walls and one second retaining wall);
FIG. 9 is a schematic diagram of the withstand voltage and insulation effect of a product with a movable contact and a retaining wall (the left side static contact current flows in and the right side static contact current flows out) according to the embodiment of the invention;
FIG. 10 is a schematic diagram of the withstand voltage and insulation effect of the product of the comparative example (left side static contact current in, right side static contact current out);
FIG. 11 is a schematic diagram of the withstand voltage and insulation effect of a product with a movable contact and a retaining wall (right side static contact current flowing in, left side static contact current flowing out) according to an embodiment of the present invention;
FIG. 12 is a schematic view of the withstand voltage and insulation effect of the product of the comparative example (right side static contact current in, left side static contact current out);
FIG. 13 is a schematic illustration of the contaminant isolation effect of an embodiment of the present invention;
FIG. 14 is a schematic diagram of the withstand voltage and insulation effect of the product of the embodiment of the invention (the connection of two static contacts has polarity requirements, the left static contact current flows in, and the right static contact current flows out);
fig. 15 is a schematic diagram of the withstand voltage and insulation effect of the product according to the embodiment of the present invention (the connection of two static contacts has polarity requirements, the right static contact current flows in, and the left static contact current flows out).
Detailed Description
Examples
Referring to fig. 1 to 15, the high-voltage direct current relay with magnetic steel arc extinction comprises a cover body 1, two fixed contacts 21 and 22, a movable contact 3, a push rod assembly 4 for pushing the movable contact to move and two magnetic steels 5, wherein one end of the push rod assembly 4 is matched with the movable contact 3, and the other end of the push rod assembly 4 is connected with a magnetic circuit part; the cover body 1 includes a top wall 11 and four side walls, and a cavity 10 with a downward opening is defined by the top wall 11 and the four side walls, the movable contact 3 is of a straight-piece type structure, and two ends of the length of the movable contact 3 are respectively provided with a movable contact, in this embodiment, the position, which is used for contacting with the fixed contact, in the two ends of the length of the movable contact 3 is used as the movable contact, and of course, an independent movable contact part may be manufactured separately and then fixed to the corresponding positions of the two ends of the length of the movable contact 3; The bottom ends of the two fixed contacts 21 and 22 are provided with fixed contacts, and the position, which is used for being contacted with the movable contact, in the bottom ends of the fixed contacts is used as the fixed contact, and of course, the fixed contacts can be fixed to the corresponding positions of the bottom ends of the fixed contacts after separate fixed contact parts are manufactured; of the four side walls of the cover 1, two of the opposite first side walls 12 correspond to the length of the movable contact 3, and the other two opposite second side walls 13 correspond to the width of the movable contact 3; the two fixed contacts 21 and 22 respectively penetrate through the top wall 11 of the cover body 1, the bottom ends of the two fixed contacts 21 and 22 are positioned in the cavity 10, the movable contact 3 is movably positioned in the cavity 10 through the push rod assembly 4, and the movable contacts at the two ends of the movable contact 3 are respectively matched with the fixed contacts of the two fixed contacts 21 and 22 so as to realize that current flows in from one fixed contact, and after passing through the movable contact 3, the current flows out from the other fixed contact; The two pieces of magnetic steel 5 are respectively arranged near the contacts, the two pieces of magnetic steel 5 are respectively arranged at the outer sides of two ends corresponding to the length of the movable contact piece 3, the height positions of the magnetic steel are approximately level with the movable contact piece 3 or lower than the movable contact piece 3, in the embodiment, the height positions of the magnetic steel are set to be lower than the upper end face of the movable contact piece 3, the polarities of the two pieces of magnetic steel 5 are distributed up and down, and the polarities of the two pieces of magnetic steel 5 are arranged in opposite directions, wherein the magnetic steel 5 corresponding to the side of the fixed contact 21 is the magnetic steel 5 with the upper S pole at the lower N pole and the magnetic steel 5 corresponding to the side of the fixed contact 22 is the upper S pole at the lower N pole; In this embodiment, a placing cavity for placing the magnetic steel is directly formed on the cover body, or a placing part for placing the magnetic steel can be arranged outside the cover body through other components, through the configuration of the magnetic steel, the rotation direction of magnetic blowing force at the contact points at two ends of the movable contact piece around the center point of the movable contact piece is the same, as shown in fig. 3, when current flows in from the fixed contact 21 and the fixed contact 22 flows out, the magnetic field M formed by the two magnetic steels 5 (comprising the magnetic field formed between the two magnetic steels and the magnetic field formed by the two magnetic steels respectively and independently) acts, the lorentmagnetic force (namely, the magnetic blowing force) F is generated at the contact points, the directions of the two lorentmagnetic forces F are clockwise, As shown in fig. 5, when current flows out from the fixed contact 21 and the fixed contact 22 flows in, a lorentz magnetic force (i.e., magnetic blowing force) F is generated at the contact under the action of a magnetic field M formed by the two magnetic steels 5, and the two lorentz magnetic forces F are counterclockwise, so that the movable contact 3 is counterclockwise deflected; In the two opposite first side walls 12 of the cover body 1 corresponding to the length of the movable contact piece, one side corresponding to the length of the movable contact piece 3 is respectively provided with a first retaining wall 61 along the vertical direction, and at least one of the two first retaining walls is in micro clearance fit with the movable contact piece, so that the movable contact piece is limited by the amplitude of rotation under the action of magnetic blowing force by utilizing the at least one first retaining wall, and the movable contact piece can only collide with one of the first retaining walls when rotating, thereby ensuring that a sufficient space for cutting off an electric arc exists between the movable contact piece and the side wall of the cover body, and increasing the creepage distance between two fixed contacts.
In this embodiment, two first retaining walls 61 are adopted to form a slight clearance fit with the movable contact 3.
In this embodiment, the first retaining wall 61 is disposed between the movable contact corresponding to one side of the length of the movable contact 3 and the center line of the length of the movable contact.
In this embodiment, in the two opposite first side walls 12 of the cover body 1 corresponding to the length of the movable contact 3, a second retaining wall 62 is respectively disposed on the other side corresponding to the length of the movable contact 3, and at least one of the two second retaining walls is in larger clearance fit with the movable contact, so that the movable contact 3 can only collide with one of the first retaining walls when rotating, thereby increasing the creepage distance between the two stationary contacts by using the second retaining wall, and improving the pressure resistance and insulation performance of the product.
In this embodiment, two second retaining walls 62 are adopted to form a larger clearance fit with the movable contact 3.
In this embodiment, the second retaining wall 62 is disposed between the movable contact corresponding to the other side of the length of the movable contact 3 and the center line of the length of the movable contact.
In this embodiment, four retaining walls, namely, two first retaining walls 61 and two second retaining walls 62, are disposed in two opposite first side walls 12 of the cover 1, that is, one first retaining wall 61 and one second retaining wall 62 are disposed in each first side wall 12.
Of course, the present invention may also be provided with only two first retaining walls 61 without the second retaining wall 62 (as shown in fig. 7), or may be provided with two first retaining walls 61 and one second retaining wall 62 (as shown in fig. 8).
According to the structure, when the movable contact piece 3 rotates, the distance between the movable contact piece 3 and the cavity wall of the cavity can be ensured, so that the space for cutting off an electric arc is ensured, as shown in fig. 4, when the movable contact piece 3 rotates clockwise under the action of magnetic blowing force F, the movable contact piece 3 cannot deflect greatly under the action of the first retaining wall 61 of one first side wall 12, the distance between the movable contact piece 3 and the cavity wall of the cavity is ensured, the space 63 for cutting off the electric arc is ensured, and when the movable contact piece 3 rotates anticlockwise under the action of the magnetic blowing force F, the movable contact piece 3 cannot deflect greatly under the action of the first retaining wall 61 of the other first side wall 12, so that the distance between the movable contact piece 3 and the cavity wall of the cavity is ensured, and the space 64 for cutting off the electric arc is ensured. According to the structure, the first retaining wall 61 has a limiting effect on the movable contact 3, so that the rotation amplitude of the movable contact is small, and poor contact between the movable contact of the movable contact 3 and the fixed contact of the fixed contact can be prevented. According to the structure, the first retaining wall 61 limits the movable contact piece 3, so that the movable contact piece 3 can only touch one of the first retaining walls 61 no matter how the movable contact piece 3 rotates, and the friction force of the movable contact piece 3 when moving up and down along with the push rod assembly 4 can be reduced.
As shown in fig. 9 to 12, the structure of the present invention concentrates copper scraps and foreign matters in the cavity relatively at opposite angles under the action of lorentz magnetic force, so that the retaining walls at opposite angles are easy to metalize, if four retaining walls are in micro clearance fit with the movable contact piece 3 (as shown in fig. 10 and 12), the movable contact piece 3 contacts with two retaining walls when rotating, and when the foreign matters accumulate to a certain extent, conductive channels are easily formed between the retaining walls at the opposite angles, so that poor pressure resistance and insulation of the product are caused, and because the second retaining wall 62 is in larger clearance fit with the movable contact piece 3 (as shown in fig. 9 and 11), the movable contact piece 3 contacts with only one retaining wall when rotating, and the conductive channels are not easy to form between the retaining walls at the opposite angles.
As shown in fig. 13, in this structure of the present invention, since the plastic parts and the organic gas in the cavity 10 are burned by the arc when switching the load, the two first retaining walls 61 and the two second retaining walls 62 can play a role of blocking, so that the pollutants generated in the left and right switching load areas cannot be connected in series, thereby reducing the risks of withstand voltage and poor insulation of the product.
In this embodiment, four retaining walls are adopted, wherein two first retaining walls 61 are in micro-clearance fit with the movable contact 3, and two second retaining walls 62 are in larger-clearance fit with the movable contact 3. This structure can be used for the connection of two fixed contacts without polarity requirement, and the current direction passing through the movable contact 3 is fixed, for example, the fixed contact 21 flows in, the fixed contact 22 flows out, or the fixed contact 22 flows in and the fixed contact 21 flows out. One of the two second retaining walls is in larger clearance fit with the movable contact, and the second retaining wall is positioned in the first side wall corresponding to the front direction of the magnetic blowing force, and the other second retaining wall can be in tiny clearance fit with the movable contact 3 (as shown in fig. 14 and 15).
Of course, one of the two first retaining walls may be in a slight clearance fit with the movable contact, and the one of the two first retaining walls is located in the first side wall corresponding to the front direction of the magnetic blowing force; and the other first retaining wall can be in larger clearance fit with the movable contact piece 3.
The invention relates to a high-voltage direct-current relay with magnetic steel arc extinction, which adopts the steps that two magnetic steels 5 are respectively arranged near contacts, and the magnetic blowing force at the contacts at two ends of a movable contact piece can be formed to be the same in the rotation direction around the center point of the movable contact piece; in the two opposite first side walls 12 of the cover body 1 corresponding to the length of the movable contact piece, one first retaining wall 61 along the vertical direction is respectively arranged at one side corresponding to the length of the movable contact piece 3, and at least one first retaining wall of the two first retaining walls 61 is in micro clearance fit with the movable contact piece. The structure of the invention can limit the rotation amplitude of the movable contact sheet under the action of the magnetic blowing force by utilizing the first retaining wall 61, so that the movable contact sheet 3 can only collide with one of the first retaining walls 61 when rotating, thereby preventing poor contact of the stationary contact caused by large rotation of the stop contact sheet, ensuring enough space for cutting off the electric arc between the movable contact sheet and the side wall of the cover body, and increasing the creepage distance between the two stationary contacts.
The invention relates to a high-voltage direct current relay with magnetic steel arc extinction, which is characterized in that two opposite first side walls 12 of a cover body 1 corresponding to the length of a movable contact piece are respectively provided with a second retaining wall 62 along the vertical direction on the other side corresponding to the length of the movable contact piece 3, and at least one second retaining wall 62 of the two second retaining walls is in larger clearance fit with the movable contact piece, so that the movable contact piece can only collide with one first retaining wall 61 when rotating. The invention can utilize the added second retaining wall to play a role of blocking, so that pollutants in a left-right switching load area cannot be communicated, thereby improving the pressure resistance and the insulation property of the product.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (8)
1. A high-voltage direct current relay with magnetic steel arc extinction comprises a cover body, two fixed contacts, a movable contact, a push rod component for pushing the movable contact to move and two magnetic steels; the cover body comprises a top wall and four side walls, and a cavity with a downward opening is formed by the top wall and the four side walls; the two fixed contacts respectively penetrate through the top wall of the cover body, the bottom ends of the two fixed contacts are positioned in the cavity, the movable contact is movably positioned in the cavity through the push rod assembly, and the movable contacts arranged at the two ends of the movable contact are respectively matched with the fixed contacts arranged at the bottom ends of the two fixed contacts, so that current flows in from one fixed contact, and flows out from the other fixed contact after passing through the movable contact; the method is characterized in that: the two pieces of magnetic steel are respectively arranged near the contacts, and the rotating directions of magnetic blowing forces at the contacts at the two ends of the movable contact piece around the center point of the movable contact piece are the same; in the two opposite first side walls of the cover body corresponding to the length of the movable contact, one side corresponding to the length of the movable contact is provided with a first retaining wall along the vertical direction, at least one of the two first retaining walls is in smaller clearance fit with the movable contact, so that the movable contact is limited by the amplitude of rotation under the action of magnetic blowing force by using the at least one first retaining wall, and the movable contact can only collide with one of the first retaining walls when rotating, thereby ensuring enough space for cutting off electric arcs between the movable contact and the side wall of the cover body and increasing the creepage distance between the two fixed contacts; in the cover body corresponding to the two opposite first side walls of the length of the movable contact, one second retaining wall along the vertical direction is respectively arranged on the other side corresponding to the length of the movable contact, and at least one second retaining wall of the two second retaining walls is in larger clearance fit with the movable contact, so that the movable contact can only collide with one first retaining wall when rotating, the second retaining wall is utilized to play a blocking role, pollutants in a left-right switching load area can not be communicated, and the pressure resistance and the insulation property of a product are improved.
2. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: the first retaining wall is arranged between the movable contact corresponding to one side of the length of the movable contact and the central line of the length of the movable contact.
3. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: when the polarity requirement is met for the connection of the two fixed contacts, and the current direction passing through the movable contact is fixed, one of the two first retaining walls is in smaller clearance fit with the movable contact, and the one of the two first retaining walls is positioned in the first side wall corresponding to the front direction of the magnetic blowing force; or the two first retaining walls are in smaller clearance fit with the movable contact piece.
4. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: when the connection of the two fixed contacts has no polarity requirement and the current direction passing through the movable contact is not fixed, the two first retaining walls are in smaller clearance fit with the movable contact.
5. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: the second retaining wall is arranged between the movable contact corresponding to the other side of the length of the movable contact and the central line of the length of the movable contact.
6. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: when the polarity requirement is met for the connection of the two fixed contacts, and the current direction passing through the movable contact is fixed, one of the two second retaining walls is in larger clearance fit with the movable contact, and the one second retaining wall is positioned in the first side wall corresponding to the front direction of the magnetic blowing force; or the two second retaining walls are in larger clearance fit with the movable contact piece.
7. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: when the connection of the two fixed contacts has no polarity requirement and the current direction passing through the movable contact is not fixed, the two second retaining walls are in larger clearance fit with the movable contact.
8. The high voltage dc relay with magnetic steel arc extinction of claim 1 wherein: the two magnetic steels are respectively arranged at the outer sides of the two ends corresponding to the length of the movable contact piece, the polarities of the two magnetic steels are distributed up and down, and the polarities of the two magnetic steels are arranged in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374945.4A CN109473317B (en) | 2018-11-19 | 2018-11-19 | High-voltage direct-current relay with magnetic steel arc extinction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811374945.4A CN109473317B (en) | 2018-11-19 | 2018-11-19 | High-voltage direct-current relay with magnetic steel arc extinction function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109473317A CN109473317A (en) | 2019-03-15 |
| CN109473317B true CN109473317B (en) | 2024-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811374945.4A Active CN109473317B (en) | 2018-11-19 | 2018-11-19 | High-voltage direct-current relay with magnetic steel arc extinction function |
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| CN109920704A (en) * | 2019-03-28 | 2019-06-21 | 浙江英洛华新能源科技有限公司 | Anti- Lorentz force relay |
| CN111508779B (en) * | 2020-04-30 | 2021-05-28 | 西安交通大学 | Contact structure of medium-frequency contactor, contactor and method |
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| CN103426687A (en) * | 2013-08-14 | 2013-12-04 | 厦门宏发电声股份有限公司 | Clapper-type electromagnetic relay |
| CN103515153A (en) * | 2013-08-07 | 2014-01-15 | 浙江宏舟新能源科技有限公司 | Reliable arcing system of non-polarity high-voltage direct current contactor |
| CN208970441U (en) * | 2018-11-19 | 2019-06-11 | 浙江宏舟新能源科技有限公司 | High voltage direct current relay with magnet steel arc extinguishing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203325803U (en) * | 2013-07-05 | 2013-12-04 | 厦门宏发电力电器有限公司 | Frame part of relay |
| CN104143771B (en) * | 2014-08-04 | 2016-05-04 | 南通星宇电气有限公司 | A kind of high-tension switch cabinet |
| CN107871644B (en) * | 2017-09-29 | 2020-08-28 | 浙江宏舟新能源科技有限公司 | High-voltage direct-current relay with high creepage distance and assembly method thereof |
| CN108321032B (en) * | 2018-03-13 | 2024-01-26 | 厦门宏发电声股份有限公司 | Movable contact spring for safety relay and safety relay thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103515153A (en) * | 2013-08-07 | 2014-01-15 | 浙江宏舟新能源科技有限公司 | Reliable arcing system of non-polarity high-voltage direct current contactor |
| CN103426687A (en) * | 2013-08-14 | 2013-12-04 | 厦门宏发电声股份有限公司 | Clapper-type electromagnetic relay |
| CN208970441U (en) * | 2018-11-19 | 2019-06-11 | 浙江宏舟新能源科技有限公司 | High voltage direct current relay with magnet steel arc extinguishing |
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