CN112837969B - A fast-acting high-voltage DC magnetic latching relay with arc-extinguishing magnet - Google Patents
A fast-acting high-voltage DC magnetic latching relay with arc-extinguishing magnet Download PDFInfo
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- CN112837969B CN112837969B CN202110055834.2A CN202110055834A CN112837969B CN 112837969 B CN112837969 B CN 112837969B CN 202110055834 A CN202110055834 A CN 202110055834A CN 112837969 B CN112837969 B CN 112837969B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 111
- 230000003068 static effect Effects 0.000 claims abstract description 27
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 239000000696 magnetic material Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 122
- 239000010959 steel Substances 0.000 claims description 122
- 235000014676 Phragmites communis Nutrition 0.000 claims description 37
- 230000005389 magnetism Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims 9
- 230000000171 quenching effect Effects 0.000 claims 9
- 238000013021 overheating Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 230000008033 biological extinction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
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- 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
-
- 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
- H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
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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
本发明公开了一种带灭弧磁钢的速动型高压直流磁保持继电器，包括静触点引出端、动簧片、推动杆部件、直动式磁保持磁路结构以及灭弧磁钢，推动杆部件的头部处在直动式磁保持磁路结构的轭铁板的上面，推动杆部件的头部包括U形支架、固定片和将固定片与推动杆的顶端注塑在一起的塑料件，固定片为磁性材料片，所述灭弧磁钢向下延伸至与所述固定片相对的位置处，从而利用所述灭弧磁钢与轭铁板所形成的磁回路在所述固定片上形成一个向上的驱动力，以减小推动杆部件所受到的向下的继电器断开保持力。本发明使得继电器断开保持力在满足产品抗振动冲击性能的前提下尽可能小，从而实现产品的速动，起到了降低能耗，避免线圈过热导致线圈烧毁的风险。
The present invention discloses a fast-acting high-voltage direct current magnetic latching relay with arc-extinguishing magnet, comprising a static contact lead-out terminal, a moving spring, a push rod component, a direct-acting magnetic latching magnetic circuit structure and an arc-extinguishing magnet, wherein the head of the push rod component is located above the yoke iron plate of the direct-acting magnetic latching magnetic circuit structure, the head of the push rod component comprises a U-shaped bracket, a fixing plate and a plastic part that injection-moldes the fixing plate and the top of the push rod together, the fixing plate is a magnetic material sheet, the arc-extinguishing magnet extends downward to a position relative to the fixing plate, thereby utilizing the magnetic circuit formed by the arc-extinguishing magnet and the yoke iron plate to form an upward driving force on the fixing plate, so as to reduce the downward relay disconnection holding force exerted on the push rod component. The present invention makes the relay disconnection holding force as small as possible while satisfying the product's anti-vibration and impact performance, thereby achieving the quick action of the product, reducing energy consumption, and avoiding the risk of coil burning due to overheating of the coil.
Description
Technical Field
The invention relates to the technical field of relays, in particular to a quick-acting high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel.
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 magnetic latching relay is one of relays, is also an automatic switch, and plays a role in automatically switching on and off a circuit as other electromagnetic relays, except that the normally closed or normally open state of the magnetic latching relay is completely dependent on the action of permanent magnet steel, and the switching of the switching state is completed by triggering by a pulse electric signal with a certain width.
The high-voltage direct-current magnetic latching relay in the prior art generally comprises two stationary contact leading-out ends (namely load ends), a movable reed, a push rod component and a direct-acting magnetic latching magnetic circuit structure, wherein the movable reed is arranged at the top of the push rod component through a main spring, and the bottom of the push rod component is connected with a movable iron core of the direct-acting magnetic latching magnetic circuit structure; the direct-acting magnetic latching magnetic circuit structure comprises a static iron core, a coil, a yoke iron cylinder, a yoke iron plate and retaining magnetic steels besides the movable iron core, wherein the movable iron core and the static iron core are respectively matched in an iron core hole of the coil, the movable iron core is arranged at the bottom of the coil, the yoke iron cylinder is coated on the bottom surface and two side surfaces of the coil, the yoke iron plate is arranged above the coil and is contacted with the yoke iron plates on the two side surfaces, and the two retaining magnetic steels are respectively arranged between the upper part of the coil corresponding to the winding window and the lower part of the yoke iron plate. The high-voltage direct-current magnetic latching relay with the structure forms a bidirectional magnetic field loop in the opened and closed states of the product through the holding magnetic steel in the relay, and the magnetic field loop generates a holding force on the movable iron core, so that the opened or closed state of the product is maintained. Because the relay product is in the off state, the contact is kept in the off state by the driving force generated by the magnetic field for keeping the magnetic steel, when the relay acts, the contact can be closed only by overcoming the driving force generated by the magnetic field for keeping the magnetic steel by the driving force generated by the coil, so that the contact closing process is slow, the quick-acting effect of the product cannot be realized, and in order to realize the quick-acting effect of the product, the coil is required to be enlarged, and the risk of burning the coil due to overheating of the coil exists.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the quick-action high-voltage direct-current magnetic latching relay with the arc extinguishing magnetic steel, and the breaking and retaining force of the relay is as small as possible on the premise of meeting the vibration and impact resistance of a product through structural improvement, so that the quick-action of the product is realized, the energy consumption is reduced, and the risk of burning the coil caused by overheating of the coil is avoided.
The technical scheme adopted for solving the technical problems is as follows: a quick-acting high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel comprises a fixed contact leading-out end, a movable reed, a push rod component and a direct-acting magnetic latching magnetic circuit structure; the bottom ends of the two stationary contact leading-out ends are respectively matched with the two ends of the movable reed to realize the contact and separation of the stationary contact; the movable reed is arranged at the head part of the push rod part through the main spring, and the bottom part of the push rod part is connected with the direct-acting magnetic latching magnetic circuit structure; the relay also comprises an arc-extinguishing magnetic steel which is arranged beside the contact position corresponding to the moving contact and the fixed contact; the head of the push rod part is positioned above the yoke plate of the direct-acting magnetic latching magnetic circuit structure and comprises a U-shaped bracket, a fixing piece and a plastic piece for injection molding the fixing piece and the top end part of the push rod together, wherein two ends of the fixing piece respectively protrude out of two opposite side surfaces of the plastic piece and are fixed with the bottom ends of two sides of the U-shaped bracket; the fixed sheet is a magnetic material sheet, and the arc-extinguishing magnetic steel extends downwards to a position opposite to the fixed sheet, so that an upward driving force is formed on the fixed sheet by utilizing a magnetic loop formed by the arc-extinguishing magnetic steel and the yoke iron plate, and the downward relay disconnection maintaining force born by the push rod component is reduced.
The middle of the fixing piece is provided with a through hole, the top end of the pushing rod penetrates through the through hole of the fixing piece, and the pushing rod is not contacted with the fixing piece.
The bottom end of the main spring is propped against the plastic piece, and the top end of the main spring props the movable reed to the inner side of the upper wall of the U-shaped bracket.
The upper end of the plastic part is provided with a groove communicated with the fixing piece, the bottom end of the main spring is propped against the fixing piece through the groove of the plastic part, and the top end of the main spring props the movable reed to the inner side of the upper wall of the U-shaped bracket.
The four arc-extinguishing magnetic steels are respectively positioned at two sides of the width of the movable reed and are respectively opposite to the corresponding movable contact points; and the polarities of the opposite pole faces of the two magnetic steels corresponding to the same movable contact and the fixed contact are different.
The arc-extinguishing magnetic steel is divided into two blocks, which are respectively positioned at two sides of the width of the movable reed; two ends of each arc extinguishing magnetic steel extend to positions opposite to the movable contacts at two ends of the length of the movable reed respectively; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
The arc extinguishing magnetic steel is divided into two blocks, which are respectively positioned at the outer sides of the two ends of the length of the movable reed; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
The two ends of the fixing piece are respectively protruded out of the two opposite side surfaces of the plastic piece along the width direction of the movable reed, and the size between the end surfaces of the two ends of the fixing piece is larger than the width size of the movable reed.
The direct-acting magnetic latching magnetic circuit structure also comprises a coil, a static iron core, a movable iron core, a yoke cylinder and a retaining magnetic steel; the yoke cylinder is arranged below the yoke plate, the coil is sleeved in the yoke cylinder, the iron core holes of the coil are arranged vertically, the static iron core and the movable iron core are respectively matched in the iron core holes of the coil, the movable iron core is arranged under the upper static iron core, and the bottom end of the push rod is fixed with the movable iron core; the holding magnetic steel is arranged between the yoke iron plate and the coil.
A magnetic isolating sheet is also installed between movable iron core and static iron core for further reducing the downward relay breaking holding force of push rod and regulating the thickness of magnetic isolating sheet.
The magnetism isolating sheet is a sheet body made of non-magnetic stainless steel materials.
The magnetism isolating sheet is fixed at the upper end of the static iron core.
The magnetism isolating sheet is fixed at the lower end of the movable iron core.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention adopts the fixing piece as the magnetic material piece and downwards extends the arc-extinguishing magnetic steel to the position opposite to the fixing piece. The structure of the invention can form an upward driving force on the fixing piece of the magnetic material by utilizing the magnetic loop formed by the arc extinguishing magnetic steel and the yoke iron plate, thereby reducing the downward relay disconnection holding force born by the push rod component and realizing the quick action effect of the high-voltage direct current magnetic latching relay.
2. The invention adopts a magnetic isolation sheet between the movable iron core and the static iron core of the direct-acting magnetic latching magnetic circuit structure. The structure of the invention can further reduce the downward relay disconnection holding force applied to the push rod component by using the magnetism isolating sheet, and adjust the relay disconnection holding force by adjusting the thickness of the magnetism isolating sheet.
The invention is described in further detail below with reference to the drawings and examples; however, the quick-action high-voltage direct-current magnetic latching relay with the arc extinguishing magnetic steel is not limited to the embodiment.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention (taken along the line connecting the two stationary contact lead-out ends);
FIG. 2 is a schematic view of an embodiment of the present invention (taken along a direction perpendicular to the midpoint of the line connecting the two stationary contact lead-out ends);
FIG. 3 is an exploded perspective view of an embodiment of the present invention;
fig. 4 is a schematic diagram of an arc extinguishing magnet steel, a fixing sheet and a yoke plate forming a magnetic field loop to provide an upward driving force according to an embodiment of the present invention;
fig. 5 is an exploded equivalent view of the force effect of the arc extinguishing magnet steel, the fixing sheet and the yoke plate forming the magnetic field loop force value according to the embodiment of the invention;
FIG. 6 is a schematic diagram of a relay off state magnetic field circuit and a force generating value state according to an embodiment of the present invention;
FIG. 7 is a schematic view of a relay forward energized contact closing process state of an embodiment of the present invention;
FIG. 8 is a schematic diagram of a relay closed state magnetic field circuit and a force generating value state according to an embodiment of the present invention;
Fig. 9 is a schematic view of a relay reverse excitation contact opening process state of an embodiment of the present invention.
Detailed Description
Examples
Referring to fig. 1 to 9, the quick-action high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel comprises a fixed contact leading-out end 1, a movable reed 2, a push rod part 3 and a direct-action magnetic latching magnetic circuit structure 4; the bottom ends 11 (used as the static contacts) of the two static contact leading-out ends 1 are respectively matched with the two ends 21 (used as the movable contacts) of the movable reed 2 so as to realize the contact and separation of the movable contacts; the movable reed 2 is arranged at the head of the push rod part 3 through the main spring 31, and the bottom of the push rod part 3 is connected with the direct-acting magnetic latching magnetic circuit structure 4; the relay also comprises arc-extinguishing magnetic steel 5, wherein the arc-extinguishing magnetic steel 5 is arranged beside the contact position corresponding to the moving contact point (namely, the contact position between the two ends 21 of the moving reed 2 and the bottom ends 11 of the two fixed contact point leading-out ends 1); the head of the push rod part 3 is positioned above the yoke plate 41 of the direct-acting magnetic latching magnetic structure 4, the head of the push rod part 3 comprises a U-shaped bracket 32, a fixing piece 33 and a plastic piece 35 which is used for injection molding the fixing piece 33 and the top end part of the push rod 34 together, wherein two ends of the fixing piece 33 respectively protrude out of two opposite side surfaces of the plastic piece 35 and are fixed with two bottom ends of the U-shaped bracket 32; the fixing piece 33 is a magnetic material piece, and the arc-extinguishing magnet steel 5 extends downwards to a position opposite to the fixing piece 33, so that an upward driving force is formed on the fixing piece 33 by utilizing a magnetic loop formed by the arc-extinguishing magnet steel 5 and the yoke plate 41, and the downward relay disconnection maintaining force applied to the push rod component 3 is reduced.
In this embodiment, a through hole 331 is provided in the middle of the fixing piece 33, the top end of the pushing rod 34 passes through the through hole 331 of the fixing piece, and the pushing rod 34 is not contacted with the fixing piece 33, so that a plastic part of the plastic part 35 is arranged between the through hole 331 of the fixing piece 33 and the pushing rod 34.
In this embodiment, the upper end of the plastic member 35 is provided with a groove 351 leading to the fixing piece 33, the bottom end of the main spring abuts against the fixing piece 33 through the groove 351 of the plastic member 35, and the top end of the main spring 31 pushes the movable reed 2 to the inner side of the upper wall of the U-shaped bracket 32. Of course, the bottom end of the main spring 31 may directly abut against the plastic member 35.
In this embodiment, the number of the arc-extinguishing magnetic steels 5 is four, and the arc-extinguishing magnetic steels are respectively located at two sides of the width of the movable reed 2 and are respectively opposite to the corresponding movable contact and the movable contact; and polarities of the opposite pole faces of the two arc-extinguishing magnetic steels 5 corresponding to the same movable contact and the fixed contact are different. As shown in fig. 4 and 5, in two pieces of magnetic steel 5 corresponding to the same moving and static contact, when the magnetic pole face of one piece of magnetic steel 5 facing the other piece of magnetic steel 5 is N, the magnetic pole face of the other piece of magnetic steel 5 facing the one piece of magnetic steel 5 is S.
Of course, two arc-extinguishing magnetic steels can be adopted to realize arc extinction.
The two arc-extinguishing magnetic steels can be respectively positioned at two sides of the width of the movable reed; two ends of each arc extinguishing magnetic steel extend to positions opposite to the movable contacts at two ends of the length of the movable reed respectively; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
The two arc-extinguishing magnetic steels can also be respectively positioned at the outer sides of the two ends of the length of the movable reed; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
In this embodiment, the two ends of the fixing piece 33 protrude from two opposite sides of the plastic member 35 along the width direction of the movable spring 2, and the dimension between the two end surfaces of the fixing piece 33 is larger than the width dimension of the movable spring 2.
In this embodiment, the direct-acting magnetic latching magnetic circuit structure 4 further includes a coil 42, a stationary core 43, a movable core 44, a yoke 45, and a retaining magnetic steel 46, where the coil 42 includes a coil frame 421 and an enameled wire 422; the yoke cylinder 45 is arranged below the yoke plate 41, the coil 42 is sleeved in the yoke cylinder 45, the iron core hole 423 of the coil 42 is vertically arranged, the static iron core 43 and the movable iron core 44 are respectively matched in the iron core hole 423 of the coil 42, the movable iron core 44 is arranged above, the static iron core 43 is arranged below, the static iron core 43 is fixed in the iron core hole 423 of the coil 42, the movable iron core 44 is movably matched in the iron core hole 423 of the coil 42, and the bottom end of the push rod 34 is fixed with the movable iron core 44; the holding magnet steel 46 is installed between the yoke plate 41 and the coil 42, specifically, the holding magnet steel 46 is installed at the top of the coil frame 421 and is located between the yoke plate 41 and the enameled wire 422 of the coil 42, the holding magnet steel 46 is two, and the polarities of the opposite sides of the two holding magnet steels 46 are the same at the two end positions corresponding to the length of the movable reed 2, in this embodiment, the polarities of the opposite sides of the two holding magnet steels 46 are N poles.
In this embodiment, a magnetism isolating sheet 6 is further installed between the movable iron core 44 and the stationary iron core 43, so that the magnetism isolating sheet 6 is used to further reduce the downward relay-off holding force (corresponding to the closing holding force between the movable iron core 44 and the stationary iron core 43) applied to the push rod unit 3, and the thickness of the magnetism isolating sheet 6 is adjusted to adjust the relay-off holding force (corresponding to the closing holding force between the movable iron core 44 and the stationary iron core 43).
In this embodiment, the magnetism isolating sheet 6 is a sheet made of nonmagnetic stainless steel material.
In this embodiment, the magnetism isolating sheet 6 is fixed to the upper end of the stationary core 43.
The relay also has ceramic cover 71, plastic bracket 72, frame piece 73, lead pin 74, exhaust pipe 75, metal shell 76, coil tab 77, etc.
The quick-acting high-voltage direct-current magnetic latching relay with the arc-extinguishing magnetic steel adopts the fixing piece 33 as a magnetic material piece, and the arc-extinguishing magnetic steel 5 is downwards extended to a position opposite to the fixing piece 33. The structure of the invention can form an upward driving force on the fixed sheet 33 of magnetic material by utilizing the magnetic circuit formed by the arc extinguishing magnetic steel 5 and the yoke plate 41, thereby reducing the downward relay opening holding force (corresponding to the closing holding force between the movable iron core 44 and the static iron core 43) born by the pushing rod component 3 and realizing the quick action effect of the high-voltage direct current magnetic latching relay.
As shown in fig. 4 and 5, the fixing piece 33 is a magnetic conductive piece, N and S poles of the four arc-extinguishing magnet steels 5 are opposite, the arc-extinguishing magnet steels 5 and the yoke iron plate 41 form a ring loop, so that the fixing piece 33 has a force, and the fixing piece 33 and the pushing rod 34 are integrally injection molded, namely, a force with left force or right force on the pushing rod component 3 is formed, and the force depends on whether the distance from the arc-extinguishing magnet steels 5 is close to the left or the right; since the push rod part 3 is vertically spaced from the magnetic steel, a guiding effect is formed, and the force applied to the left or right can be decomposed into force values upward and left or right, so that the force is applied upward, and an upward driving force is always present. The arc-extinguishing magnetic steel 5 not only realizes the arc-extinguishing function, but also provides an upward oblique force value when the product is in quick-action, and further improves the speed capability of the product.
The invention adopts a magnetic material for the fixing piece 33, the fixing piece 33 is positioned on the top end of the pushing rod 34 and corresponds to the bottom end of the arc-extinguishing magnetic steel 5, and the fixing piece 33 is arranged between the arc-extinguishing magnetic steels 5 and has a certain driving force and a certain holding force for the pushing rod 34. And because the width of the fixed piece 33 is larger than that of the movable contact (namely the width of the movable reed), and the magnetic poles face the arc-extinguishing magnetic steel 5, the gap between the fixed piece 33 and the arc-extinguishing magnetic steel 5 is reduced, and the driving efficiency is high.
The invention relates to a quick-acting high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel, which adopts a magnetic isolating sheet 6 arranged between a movable iron core 44 and a static iron core 43 of a direct-acting magnetic latching magnetic circuit structure. The structure of the present invention can further reduce the downward relay opening holding force (corresponding to the closing holding force between the movable iron core 44 and the static iron core 43) applied to the push rod member 3 by the magnetism isolating sheet 6, and cooperate with the upward force of the arc extinguishing magnet steel 5 to the push rod 34 to form a dual driving force, further realize the quick action of the product, and can adjust the relay opening holding force (corresponding to the closing holding force between the movable iron core 44 and the static iron core 43) by adjusting the thickness of the magnetism isolating sheet 6.
Referring to fig. 6, in the relay-off state, the holding magnet steel 46 forms a lower annular circuit through the movable iron core 44, the magnetism isolating sheet 6, the stationary iron core 43, and the yoke 45, and the holding magnet steel forms an upper annular circuit through the movable iron core 44, the yoke plate 41, and the yoke 45. The force value F1 magnetic steel generated by the annular loop without an air gap at the lower part is far larger than the force value F2 magnetic steel generated by the annular loop formed at the upper part, and the force of F arc extinction is tiny and negligible relative to the force value F1 magnetic steel; f resultant force = F1 magnetic steel-F2 magnetic steel-F arc extinction, so the resultant force value of F is downward, and the product keeps a disconnected state; in consideration of realizing snap-action of the product, the magnetism blocking sheet 6 is increased, and the force value of the breaking holding force is reduced.
Referring to fig. 7, when the coil is excited in the forward direction, the holding magnet steel 46 forms a lower annular loop through the movable iron core 44, the magnetism isolating sheet 6, the static iron core 43 and the yoke 45, and generates a force value F1 magnet steel; the holding magnetic steel 46 forms an upper annular magnetic field loop through the movable iron core 44, the yoke iron plate 41 and the yoke iron cylinder 45 to generate force value F2 magnetic steel; the coil 42 is energized in a forward direction to generate a magnetic field loop opposite to the lower magnetic field in order to counteract the lower magnetic field to generate a force value of the F1 magnetic steel, and particularly note that the F coil generated by the coil only generates an effect at the moment of counteracting the F1 magnetic steel, and does not provide an upward force; the upward force of the F2 magnetic steel generated by the upper annular loop acts on the movable iron core 44, and meanwhile, the force value of the arc extinguishing magnetic steel 5 also provides an upward force value F for arc extinguishing, so that the push rod component 3 drives the movable reed 2 to move upwards until the movable contact and the movable contact are closed, and the resultant force f=f2 magnetic steel+f for arc extinguishing. The smaller the force value of the F1 magnetic steel is, the shorter the time for the coil to counteract the magnetic steel is, so that the action time can be reduced by adding the magnetism isolating sheet 6.
Referring to fig. 8, in the relay closed state, the holding magnet steel 46 forms a lower annular loop through the movable iron core 44, the magnetism isolating sheet 6, the static iron core 43 and the yoke 45, and generates a force value F1 magnet steel; the holding magnet steel 46 forms an upper annular magnetic field loop through the movable iron core 44, the yoke plate 41 and the yoke cylinder 45, and generates a force value F2 magnet steel. The force value F2 magnetic steel generated by the upper annular magnetic field loop without an air gap is far larger than that of the annular magnetic field loop F1 magnetic steel formed at the lower part, meanwhile, F dynamic pressure is required to be subtracted, the F dynamic pressure is the elastic restoring force of the main spring 31 after being compressed, and F resultant force=F2 magnetic steel+F arc extinguishing-F1 magnetic steel-F dynamic pressure. The force value of F is greater than 0, so the product remains in the closed state; the presence of F dynamic pressure enables the product to be rapidly broken.
Referring to fig. 9, when the coil is excited reversely, the holding magnet steel 46 forms a lower annular loop through the movable iron core 44, the magnetism isolating sheet 6, the static iron core 43 and the yoke 45, and generates a force value F1 magnet steel; the holding magnetic steel 46 forms an upper annular loop through the movable iron core 44, the yoke iron plate 41 and the yoke iron cylinder 45 to generate force value F2 magnetic steel; the coil is electrified and excited reversely to generate a magnetic field loop opposite to the upper magnetic field, so as to offset the force value of F2 magnetic steel generated by the upper magnetic field, and at the moment of offset of F2 magnetic steel, the downward force +F dynamic pressure of F1 magnetic steel generated by the lower annular loop acts on the movable iron core 44, the movable reed 2 is driven to be rapidly disconnected by the push rod component 3, and F resultant force = F1 magnetic steel +F dynamic pressure-F arc extinction is realized.
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 (13)
1. A quick-acting high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel comprises a fixed contact leading-out end, a movable reed, a push rod component and a direct-acting magnetic latching magnetic circuit structure; the bottom ends of the two stationary contact leading-out ends are respectively matched with the two ends of the movable reed to realize the contact and separation of the stationary contact; the movable reed is arranged at the head part of the push rod part through the main spring, and the bottom part of the push rod part is connected with the direct-acting magnetic latching magnetic circuit structure; the relay also comprises an arc-extinguishing magnetic steel which is arranged beside the contact position corresponding to the moving contact and the fixed contact; the head of the push rod part is positioned above the yoke plate of the direct-acting magnetic latching magnetic circuit structure and comprises a U-shaped bracket, a fixing piece and a plastic piece for injection molding the fixing piece and the top end part of the push rod together, wherein two ends of the fixing piece respectively protrude out of two opposite side surfaces of the plastic piece and are fixed with the bottom ends of two sides of the U-shaped bracket; the method is characterized in that: the fixed sheet is a magnetic material sheet, and the arc-extinguishing magnetic steel extends downwards to a position opposite to the fixed sheet, so that an upward driving force is formed on the fixed sheet by utilizing a magnetic loop formed by the arc-extinguishing magnetic steel and the yoke iron plate, and the downward relay disconnection maintaining force born by the push rod component is reduced.
2. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the middle of the fixing piece is provided with a through hole, the top end of the pushing rod penetrates through the through hole of the fixing piece, and the pushing rod is not contacted with the fixing piece.
3. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the bottom end of the main spring is propped against the plastic piece, and the top end of the main spring props the movable reed to the inner side of the upper wall of the U-shaped bracket.
4. The snap-action high voltage dc magnetic latching relay with arc extinguishing magnet steel according to claim 1 or 2, characterized in that: the upper end of the plastic part is provided with a groove communicated with the fixing piece, the bottom end of the main spring is propped against the fixing piece through the groove of the plastic part, and the top end of the main spring props the movable reed to the inner side of the upper wall of the U-shaped bracket.
5. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the four arc-extinguishing magnetic steels are respectively positioned at two sides of the width of the movable reed and are respectively opposite to the corresponding movable contact points; and the polarities of the opposite pole faces of the two arc-extinguishing magnetic steels corresponding to the same movable contact and the movable contact are different.
6. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the arc-extinguishing magnetic steel is divided into two blocks, which are respectively positioned at two sides of the width of the movable reed; two ends of each arc extinguishing magnetic steel extend to positions opposite to the movable contacts at two ends of the length of the movable reed respectively; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
7. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the arc extinguishing magnetic steel is divided into two blocks, which are respectively positioned at the outer sides of the two ends of the length of the movable reed; and the polarities of the opposite pole faces of the two arc extinguishing magnetic steels are different.
8. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 5, 6 or 7, wherein: the two ends of the fixing piece are respectively protruded out of the two opposite side surfaces of the plastic piece along the width direction of the movable reed, and the size between the end surfaces of the two ends of the fixing piece is larger than the width size of the movable reed.
9. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel according to claim 1, wherein: the direct-acting magnetic latching magnetic circuit structure also comprises a coil, a static iron core, a movable iron core, a yoke cylinder and a retaining magnetic steel; the yoke cylinder is arranged below the yoke plate, the coil is sleeved in the yoke cylinder, the iron core holes of the coil are arranged vertically, the static iron core and the movable iron core are respectively matched in the iron core holes of the coil, the movable iron core is arranged under the upper static iron core, and the bottom end of the push rod is fixed with the movable iron core; the holding magnetic steel is arranged between the yoke iron plate and the coil.
10. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel of claim 9, wherein: a magnetic isolating sheet is also installed between movable iron core and static iron core for further reducing the downward relay breaking holding force of push rod and regulating the thickness of magnetic isolating sheet.
11. The snap-action high voltage dc magnetic latching relay with arc quenching magnetic steel of claim 10, wherein: the magnetism isolating sheet is a sheet body made of non-magnetic stainless steel materials.
12. The snap-action high voltage dc magnetic latching relay with arc extinguishing magnet steel according to claim 10 or 11, characterized in that: the magnetism isolating sheet is fixed at the upper end of the static iron core.
13. The snap-action high voltage dc magnetic latching relay with arc extinguishing magnet steel according to claim 10 or 11, characterized in that: the magnetism isolating sheet is fixed at the lower end of the movable iron core.
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| CN202110055834.2A CN112837969B (en) | 2021-01-15 | 2021-01-15 | A fast-acting high-voltage DC magnetic latching relay with arc-extinguishing magnet |
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| CN114093718B (en) * | 2021-07-09 | 2024-10-18 | 厦门宏发电力电器有限公司 | Magnetic circuit part capable of improving initial electromagnetic attraction and high-voltage direct-current relay |
| CN113782389B (en) * | 2021-08-16 | 2025-01-17 | 江苏泓光轨道设备有限公司 | Reinforced contact signal relay |
| CN114093696B (en) * | 2021-09-29 | 2025-10-10 | 漳州宏发电声有限公司 | A magnetic latching relay with arc-extinguishing magnet |
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| CN214378254U (en) * | 2021-01-15 | 2021-10-08 | 厦门宏发电力电器有限公司 | Quick-acting high-voltage direct-current magnetic latching relay with arc extinguishing magnetic steel |
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| CN203562374U (en) * | 2013-11-19 | 2014-04-23 | 湖南航天经济发展有限公司 | Direct-operated magnetic latching relay |
| CN111091987B (en) * | 2019-12-31 | 2025-04-04 | 厦门宏发电力电器有限公司 | A DC relay capable of resisting short-circuit current and arc extinguishing |
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