CN114695020A - Relay for detecting working state of main contact and method for judging working state of main contact - Google Patents
Relay for detecting working state of main contact and method for judging working state of main contact Download PDFInfo
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- CN114695020A CN114695020A CN202210353256.5A CN202210353256A CN114695020A CN 114695020 A CN114695020 A CN 114695020A CN 202210353256 A CN202210353256 A CN 202210353256A CN 114695020 A CN114695020 A CN 114695020A
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- main contact
- coil
- reed
- fixing plate
- relay
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- 238000000034 method Methods 0.000 title claims abstract description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 34
- 229910052742 iron Inorganic materials 0.000 description 15
- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/08—Indicators; Distinguishing marks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/10—Electromagnetic or electrostatic shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/56—Contact spring sets
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The invention relates to a relay, in particular to a relay for detecting the working state of a main contact and a method for judging the working state of the main contact. A relay for detecting the working state of a main contact is characterized by comprising a shell, wherein a movable reed is arranged in the upper portion of the shell, the main contact is arranged on the movable reed, a yoke plate and a U-shaped yoke are arranged on the lower portion of the shell, a containing cavity is formed by the yoke plate and the U-shaped yoke, a magnetic circuit portion and a reed pipe are arranged in the containing cavity, the movable reed moves under the action of the magnetic circuit portion and drives the main contact to move, the magnetic circuit portion comprises a coil which can generate a magnetic field after being electrified, and the reed pipe is located on the outer side of the circumferential direction of the coil. The invention has the advantages of difficult interference of external magnetic field, convenient realization of miniaturization of the relay and very convenient assembly.
Description
Technical Field
The invention relates to a high-voltage direct-current relay, in particular to a relay for detecting the working state of a main contact and a method for judging the working state of the main contact.
Background
In order to master the working state of the main contacts, the chinese patent with application number 201910208203.2 discloses a high voltage direct current relay capable of detecting the action state of the main contacts, which comprises main contacts, main reed, pushing mechanism and a magnetic circuit part, wherein the two main contacts are respectively arranged on the upper part of the relay, the main reed is matched under the two main contacts, the magnetic circuit part is arranged on the lower part of the relay, the pushing mechanism is connected between the main reed and the magnetic circuit part to push the main reed to move upwards to contact with the two main contacts when the magnetic circuit part works, the reed pipe is arranged on the bottom surface of the magnetic circuit part through a fixing bracket, and the reed pipe is distributed at the position deviating from the axis of the middle through hole of the coil rack of the magnetic circuit part.
The above scheme has the following defects: the dry reed pipe used for the magnetic field generated by the induction coil is placed on the lower side of the U-shaped yoke, the U-shaped yoke plays a certain shielding role in the magnetic field of the coil positioned in the U-shaped yoke, the scheme does not shield the magnetic field of the outer wall of the relay, and the dry reed pipe is easily subjected to the action of the external magnetic field of the relay to generate misjudgment; and the reed switch is positioned at the lower side of the U-shaped yoke, so that the height of the relay is increased, and the miniaturization of the relay is influenced.
Disclosure of Invention
The invention aims to provide a relay for detecting the working state of a main contact, which is not easily interfered by an external magnetic field and is convenient for realizing miniaturization of the relay.
In order to realize the purpose, the invention adopts the following technical scheme: a relay for detecting the working state of a main contact comprises a shell, wherein a movable reed is arranged in the upper portion of the shell, the main contact is arranged on the movable reed, a yoke iron plate and a U-shaped yoke iron are arranged on the lower portion of the shell, a containing cavity is formed by the yoke iron plate and the U-shaped yoke iron, a magnetic circuit portion and a reed pipe are arranged in the containing cavity, the movable reed moves under the action of the magnetic circuit portion and drives the main contact to move, the magnetic circuit portion comprises a coil which can generate a magnetic field after being electrified, and the reed pipe is located on the outer side of the circumference of the coil.
The reed switch is arranged in the accommodating cavity formed by the yoke iron plate and the U-shaped yoke iron, but not arranged on the lower side of the magnetic circuit part of the relay, and the reed switch is positioned in the internal space formed by the relay, so that the volume change of the relay cannot be influenced, and the miniaturization of the relay cannot be influenced; simultaneously, because the tongue tube is located and holds the intracavity, the casing of relay can also carry out the shielding of certain effect to external magnetic field, and the tongue tube can not take place the break-make reaction because of the external magnetic field of relay. The yoke iron plate and the U-shaped yoke iron form an accommodating cavity which can shield the main magnetic steel positioned above the yoke iron plate and can not influence the on-off reaction of the reed pipe to a closer coil magnetic field. The invention has the advantages of being not easy to be interfered by external magnetic fields and being convenient for realizing the miniaturization of the relay.
Preferably, the reed pipe is vertically arranged, the projection of the reed pipe along the direction perpendicular to the axis of the vertical shaft hole is overlapped with the coil, the upper end of the reed pipe is higher than the upper end of the coil or is flush with the upper end of the coil, and the lower end of the reed pipe is higher than the lower end of the coil or is flush with the lower end of the coil. The reed switch is vertically arranged, and the reed switch and the coil are provided with a superposition position in the horizontal direction, so that the coil magnetic field can be received.
Preferably, the reed switch is fixed in the accommodating cavity through a fixing plate. The reed switch is limited by the fixing plate to move, so that the reed switch is fixed in position, and the situation that the reed switch is too inclined to be normally conducted is avoided.
Preferably, the fixing plate is a PCB. The reed switch can be directly communicated with a circuit on the fixing plate, so that the reed switch is convenient to fix and is also convenient to electrically connect.
Preferably, the end of the fixing plate extends out of the accommodating cavity, the housing is provided with an installation groove which is opened upwards to accommodate the U-shaped yoke, the side wall of the installation groove is provided with a fixing groove which is opened upwards and extends vertically, and the fixing groove is used for positioning and fixing the end of the fixing plate. When the relay is assembled, the reed switch is fixed on the fixing plate, the fixing plate is placed in the U-shaped yoke, and finally the U-shaped yoke is placed in the mounting groove of the shell, and the end part of the fixing plate is positioned in the fixing groove, so that the fixing plate can be assembled and fixed. The fixing plate does not need to be fixed through welding or dispensing, so that the cost is lower, and the assembly is convenient.
Preferably, the end portions of the two opposite ends of the fixing plate extend to the outside of the accommodating cavity, and the fixing grooves are formed in the two opposite side walls of the mounting groove. The above-mentioned setting is so that the fixed effect of location of fixed plate is better, and is more stable, and then realizes the fixed of tongue tube to avoid the tongue tube to take place the slope, thereby guarantee the normal break-make of tongue tube.
Preferably, a positioning structure which is matched with each other to limit the movement of the fixing plate is arranged between the inner wall of the U-shaped yoke and the outer wall of the fixing plate, and the positioning structure comprises a positioning groove and a positioning bulge which can extend into the positioning groove. The movement of the fixing plate is limited through the positioning structure, so that the fixing of the fixing plate is realized, and the fixing of a subsequent fixing plate is facilitated.
Preferably, the positioning groove is formed in the upper end or the lower end of the fixing plate, and the positioning protrusion is arranged on the inner wall of the U-shaped yoke. The arrangement facilitates the processing of the fixing plate.
Preferably, the fixing plate is provided with a limiting groove for a lead to pass through; the spacing groove sets up in fixed plate edge and runs through the fixed plate outer wall, and the opening width that the spacing groove is located fixed plate outer wall department is less than the width of spacing groove tank bottom. The limiting groove is used for a lead to pass through, and the lead is electrically connected with the reed switch and used for transmitting whether the reed switch is in on-off electric signal or not. The limiting groove is arranged at the edge of the fixing plate, so that the limiting groove can be conveniently processed. The width of the opening end (the outer end) of the limiting groove is smaller than the bottom (the inner end) of the limiting groove, and the wire can be prevented from being separated from the fixed plate by the arrangement under the condition that the outer diameter of the wire is larger than the width of the opening end (the outer end) of the limiting groove.
The invention also discloses a method for judging the working state of the main contact of the relay in any one of claims 1 to 8, which comprises the following steps: s1, the coil is electrified, an internal circuit of the reed switch is conducted, and an external detection module detects a signal of the conduction of the reed switch and judges that the main contact moves and is in contact with the static contact; s2, when the coil is powered off, the internal circuit of the reed switch is disconnected, and the external detection module detects a signal of disconnection of the reed switch, the main contact is judged to reset and is disconnected from the static contact.
The invention has the advantages of difficult interference of external magnetic field, convenient realization of miniaturization of the relay and very convenient assembly.
Drawings
FIG. 1 is a longitudinal cross-sectional view of the present invention;
FIG. 2 is a transverse cross-sectional view of the present invention;
fig. 3 is a schematic structural view of the fixing plate of the present invention located in the accommodating cavity.
Detailed Description
The invention is further described below with reference to the figures and specific embodiments.
Example 1
As shown in fig. 1 to 3, the invention discloses a relay for detecting the working state of a main contact, which comprises a housing 1, wherein a movable spring piece 11 and a leading-out end 12 are arranged in the upper part of the housing 1, main contacts 13 are arranged at two ends of the movable spring piece 11, and a fixed contact 14 is arranged at the lower end of the leading-out end 12; the lower part of the shell 1 is provided with a yoke iron plate 21 and a U-shaped yoke iron 22, the yoke iron plate 21 is positioned at an opening at the upper end of the U-shaped yoke iron 22, the yoke iron plate 21 and the U-shaped yoke iron 22 form an accommodating cavity 20, a magnetic circuit part is arranged in the accommodating cavity 20, the magnetic circuit part comprises a coil frame 23, a coil 24 which can generate a magnetic field after being electrified and a magnetic conduction cylinder 25, the magnetic conduction cylinder 25 is fixed in a vertical shaft hole of the coil frame 23, the coil 24 is wound on the outer side of the coil frame 23, a movable iron core assembly is arranged in the magnetic conduction cylinder 25 and comprises a movable iron core 26 and a push rod 27, the lower end of the push rod 27 is fixed with the movable iron core 26, the upper end of the push rod 27 penetrates through the yoke iron plate 21 and then is fixed with the movable reed 11, and the movable reed 11 moves under the action of the magnetic circuit part and drives the main contact 13 to move.
Hold and still be equipped with tongue tube 3 in the chamber 20, tongue tube 3 is located 24 circumference outsides of coil, and tongue tube 3 is fixed in holding chamber 20 through fixed plate 4 in, and fixed plate 4 is the PCB board. The reed pipe 3 is vertically arranged, the projection of the reed pipe 3 in the direction perpendicular to the axis of the vertical shaft hole and the coil 24 are overlapped, the upper end of the reed pipe 3 is higher than the upper end of the coil 24, and the lower end of the reed pipe 3 is higher than the lower end of the coil 24.
As shown in fig. 2 and 3, the front and rear ends of the fixing plate 4 extend out of the accommodating cavity 20, the housing 1 is formed with an installation groove 10 that is opened upward to accommodate the U-shaped yoke 22, opposite side walls of the installation groove 10 are formed with fixing grooves 100 that are opened upward and extend vertically, and the fixing grooves 100 are used for positioning and fixing the end of the fixing plate 4. The positioning structure which is matched with each other to limit the movement of the fixing plate 4 is arranged between the inner wall of the U-shaped yoke 22 and the outer wall of the fixing plate 4, the positioning structure comprises a positioning groove arranged at the lower end of the fixing plate and a positioning bulge 221 which can extend into the positioning groove, and the positioning bulge 221 is arranged on the inner wall of the U-shaped yoke 22.
The fixed plate 4 is equipped with the spacing groove 41 that supplies the wire to pass through, and the spacing groove 41 sets up in edge about the fixed plate 4 and runs through the outer wall of fixed plate 4, and the opening width that the spacing groove 41 is located the outer wall of fixed plate 4 department is less than the width of the 41 tank bottoms of spacing groove, and the 41 cross-sections of spacing groove are trapezoidal.
Example 2
The embodiment discloses a method for judging the working state of a main contact, which comprises the following steps: s1, the coil is electrified, an internal circuit of the reed switch is conducted, and an external detection module detects a signal of the conduction of the reed switch and judges that the main contact moves and is in contact with the static contact; s2, when the coil is powered off, the internal circuit of the reed switch is disconnected, and the external detection module detects a signal of disconnection of the reed switch, the main contact is judged to reset and is disconnected from the static contact. Wherein, S1 and S2 are not in sequence.
The invention has the advantages of difficult interference of external magnetic field, convenient realization of miniaturization of the relay and very convenient assembly.
Claims (10)
1. A relay for detecting the working state of a main contact is characterized by comprising a shell, wherein a movable reed is arranged in the upper portion of the shell, the main contact is arranged on the movable reed, a yoke plate and a U-shaped yoke are arranged on the lower portion of the shell, a containing cavity is formed by the yoke plate and the U-shaped yoke, a magnetic circuit portion and a reed pipe are arranged in the containing cavity, the movable reed moves under the action of the magnetic circuit portion and drives the main contact to move, the magnetic circuit portion comprises a coil which can generate a magnetic field after being electrified, and the reed pipe is located on the outer side of the circumferential direction of the coil.
2. The relay according to claim 1, wherein the dry reed pipe is vertically disposed, a projection of the dry reed pipe along a direction perpendicular to an axis of the vertical shaft hole has an overlapping portion with the coil, an upper end of the dry reed pipe is higher than or flush with an upper end of the coil, and a lower end of the dry reed pipe is higher than or flush with a lower end of the coil.
3. The relay according to claim 1, wherein said reed switch is fixed in said housing chamber by a fixing plate.
4. The relay according to claim 3, wherein said fixing plate is a PCB plate.
5. The relay according to claim 3, wherein the end of the fixing plate extends out of the receiving chamber, the housing is formed with a mounting groove opened upward to receive the U-shaped yoke, and a side wall of the mounting groove is formed with a fixing groove opened upward and extending vertically for positioning and fixing the end of the fixing plate.
6. The relay according to claim 5, wherein the fixing plate has opposite ends extending out of the accommodating chamber, and the fixing grooves are formed on opposite sidewalls of the mounting groove.
7. The relay according to claim 3, wherein a positioning structure is disposed between the inner wall of the U-shaped yoke and the outer wall of the fixing plate, the positioning structure cooperating with the inner wall of the U-shaped yoke to limit the movement of the fixing plate, the positioning structure including a positioning groove and a positioning protrusion extending into the positioning groove.
8. The relay according to claim 7, wherein said positioning groove is formed at an upper end or a lower end of said fixing plate, and said positioning protrusion is formed on an inner wall of said U-shaped yoke.
9. The relay according to claim 3, wherein the fixing plate is provided with a limiting groove for a lead to pass through; the spacing groove sets up in fixed plate edge and runs through the fixed plate outer wall, and the opening width that the spacing groove is located fixed plate outer wall department is less than the width of spacing groove tank bottom.
10. A method for judging an operating state of a main contact of a relay according to any one of claims 1 to 9, comprising the steps of:
s1, the coil is electrified, an internal circuit of the reed switch is conducted, and an external detection module detects a signal of the conduction of the reed switch and judges that the main contact moves and is in contact with the static contact;
s2, when the coil is powered off, the internal circuit of the reed switch is disconnected, and the external detection module detects a signal of disconnection of the reed switch, the main contact is judged to reset and is disconnected from the static contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353256.5A CN114695020A (en) | 2022-04-06 | 2022-04-06 | Relay for detecting working state of main contact and method for judging working state of main contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210353256.5A CN114695020A (en) | 2022-04-06 | 2022-04-06 | Relay for detecting working state of main contact and method for judging working state of main contact |
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| Publication Number | Publication Date |
|---|---|
| CN114695020A true CN114695020A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210353256.5A Pending CN114695020A (en) | 2022-04-06 | 2022-04-06 | Relay for detecting working state of main contact and method for judging working state of main contact |
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| Country | Link |
|---|---|
| CN (1) | CN114695020A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1539696A (en) * | 1967-06-08 | 1968-09-20 | Peugeot | Electro-mechanical device with auxiliary contacts |
| US3568008A (en) * | 1968-04-25 | 1971-03-02 | Omron Tateisi Electronics Co | Electromagnetic switching device utilizing stray magnetic flux |
| CN206250120U (en) * | 2016-11-22 | 2017-06-13 | 陕西群力电工有限责任公司 | Small-sized dry-reed relay |
| CN209515573U (en) * | 2019-03-19 | 2019-10-18 | 厦门宏发电力电器有限公司 | It is able to detect the high voltage direct current relay of main contacts action state |
| CN110491735A (en) * | 2019-08-07 | 2019-11-22 | 广州株电交通设备有限公司 | A kind of reed switch relay with protection cap |
-
2022
- 2022-04-06 CN CN202210353256.5A patent/CN114695020A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1539696A (en) * | 1967-06-08 | 1968-09-20 | Peugeot | Electro-mechanical device with auxiliary contacts |
| US3568008A (en) * | 1968-04-25 | 1971-03-02 | Omron Tateisi Electronics Co | Electromagnetic switching device utilizing stray magnetic flux |
| CN206250120U (en) * | 2016-11-22 | 2017-06-13 | 陕西群力电工有限责任公司 | Small-sized dry-reed relay |
| CN209515573U (en) * | 2019-03-19 | 2019-10-18 | 厦门宏发电力电器有限公司 | It is able to detect the high voltage direct current relay of main contacts action state |
| CN110491735A (en) * | 2019-08-07 | 2019-11-22 | 广州株电交通设备有限公司 | A kind of reed switch relay with protection cap |
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