CN108133868B - Direct current contactor contact system - Google Patents
Direct current contactor contact system Download PDFInfo
- Publication number
- CN108133868B CN108133868B CN201711471061.6A CN201711471061A CN108133868B CN 108133868 B CN108133868 B CN 108133868B CN 201711471061 A CN201711471061 A CN 201711471061A CN 108133868 B CN108133868 B CN 108133868B
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- Prior art keywords
- contact
- arc
- moving
- plate
- movable
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims description 23
- 238000007664 blowing Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a direct current contactor contact system which comprises an incoming line row, a moving contact assembly and a fixed contact assembly, wherein the incoming line row comprises a base, an upper busbar and a flexible connection joint, the moving contact assembly comprises a moving contact mechanism and an arc contact mechanism, the moving contact mechanism comprises a contact plate and a moving contact, the arc contact mechanism comprises a limiting plate, a moving arc contact seat and a moving arc contact, the limiting plate is fixedly connected with the moving contact, a locating pin is fixed on the limiting plate, one end of the moving arc contact seat is sleeved on the locating pin, the other end of the moving arc contact seat is fixedly provided with the moving arc contact, an arc contact pressure spring is sleeved on the locating pin, the lower end of the arc contact pressure spring is abutted on the moving arc contact seat, the moving contact is electrically connected with a copper braid wire between the moving contact plate, and the fixed contact assembly comprises a fixed contact and a fixed arc contact which respectively correspond to the moving contact and the moving arc contact. The invention has the advantages of long service life, strong breaking capacity, good reliability, compact structure, small volume, convenient installation and maintenance, and the like.
Description
Technical Field
The invention relates to the technical field of switching appliances, in particular to a contact system of a direct current contactor.
Background
The contactor is an opening and closing device capable of frequently closing, bearing and opening normal current and specified overload current, and is widely applied to electric power, distribution and electric equipment. The contactor contacts are mostly driven in a direct-acting mode or a rotary mode, and the corresponding contact closing modes are respectively in a direct-acting mode and a rotary mode.
The contact system in the rotation driving mode has the advantages that dust and tiny impurities cause pollution on the surface of the contact to affect current carrying, meanwhile, the contact in the rotation driving mode is a single fracture, and the arcing time is slightly longer than that of a double fracture under the same condition, so that the contact is seriously ablated, and the reliability and the service life of the contactor are reduced. Meanwhile, the arc contact system suitable for the contactor has small current carrying capacity, and large current breaking is difficult to realize.
Disclosure of Invention
The invention aims to provide a direct current contactor contact system, which is used for solving the problems of small current carrying capacity and low reliability of the existing contact system.
The invention is realized in the following way:
The invention provides a direct current contactor contact system which comprises an incoming line row, a moving contact assembly and a fixed contact assembly, wherein the incoming line row comprises a base, an upper busbar and a soft connecting joint, the upper busbar and the soft connecting joint are both fixed on the base, the moving contact assembly comprises a moving contact mechanism and an arc contact mechanism, the moving contact mechanism comprises a contact plate and a moving contact, one end of the contact plate is connected with the soft connecting joint, the other end of the contact plate is connected with the moving contact, the arc contact mechanism comprises a limiting plate, a moving arc contact seat and a moving arc contact, the limiting plate is fixedly connected with the moving contact, one end of the moving arc contact seat is sleeved on the positioning pin, the other end of the moving arc contact seat is fixedly provided with the moving arc contact, an arc contact pressure spring is sleeved on the positioning pin, the lower end of the arc contact pressure spring is abutted on the moving arc contact seat, the moving contact and the arc contact seat are electrically connected through a copper braiding wire, and the fixed contact assembly comprises a fixed contact and a fixed arc contact corresponding to the moving contact.
Further, the movable contact assembly further comprises a driving plate positioned at the bottom of the contact plate, and two ends of the driving plate are fixed with the contact plate through bolts respectively.
Further, a space is reserved between the driving plate and the contact plate, a pin shaft penetrates through the contact plate and the driving plate, stop rings are arranged at two ends of the pin shaft, and a contact spring is fixedly sleeved on the part, penetrating out of the contact plate, of the pin shaft.
Further, the limiting plate comprises a fixing part attached to the movable contact and a limiting part connected with the fixing part, the positioning pin is fixed on the limiting part, and the fixing part, the movable contact and the contact plate are fixedly connected through bolts.
Further, both ends of the limiting part are respectively provided with a stop part extending upwards.
Further, the contact surface of the moving arc contact is lower than the contact surface of the moving contact.
Further, the contact surface of the moving contact is an arc surface, and the contact surface of the static contact is a plane.
Further, the contact surface of the movable arc contact is an inclined surface matched with the contact surface of the static arc contact.
Further, the static contact assembly further comprises a lower busbar, an arc striking angle and a magnetic blowing coil, wherein the magnetic blowing coil is located between the lower busbar and the arc striking angle, two leads of the magnetic blowing coil are respectively connected with the lower busbar and the arc striking angle, the static contact is welded on the lower busbar, and the static contact is riveted on the arc striking angle.
Further, the static contact assembly further comprises a magnetic conduction plate, and the magnetic blowing coil is fixed with the magnetic conduction plate.
Compared with the prior art, the invention has the following beneficial effects:
According to the direct current contactor contact system provided by the invention, the moving contact and the static contact form the main contact assembly, the moving arc contact and the static arc contact form the arc contact assembly, and the main contact assembly and the arc contact assembly are matched, so that stable heavy current carrying can be realized; the movable contact mechanism and the movable arc contact mechanism are electrically connected by copper braided wires, so that the flexible connection of the movable contact mechanism and the movable arc contact mechanism can be realized, the degree of freedom is high, and the electrical conductivity is good; the moving arc contact is sleeved on the positioning pin through the moving arc contact seat, is fixed only by the counter force action of the arc contact pressure spring, and can elastically act within a certain range, so that the actuation is that the arc contact is firstly closed and then closed, and the main contact is firstly opened and then opened in the opening process, the arc-free breaking of the main contact is realized, the purpose of protecting the main contact is realized, the function of automatic catering compensation is completed, and the reliability of contact connection is ensured.
Drawings
Fig. 1 is a schematic structural view of a contact system of a dc contactor according to an embodiment of the present invention in a release position;
fig. 2 is a schematic structural diagram of a direct current contactor contact system according to an embodiment of the present invention when main contacts are closed and arc contacts slide each other;
Fig. 3 is a schematic structural diagram of an incoming line row of a contact system of a dc contactor according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a moving contact assembly of a contact system of a dc contactor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a static contact assembly of a contact system of a dc contactor according to an embodiment of the present invention.
Reference numerals illustrate: 1-inlet wire row, 2-moving contact assembly, 3-fixed contact assembly, 11-upper busbar, 12-base, 13-flexible connection joint, 21-driving plate, 22-moving contact mechanism, 23-arc contact mechanism, 24-copper braided wire, 221-contact plate, 222-pin shaft, 223-contact spring, 224-moving contact, 231-locating pin, 232-arc contact pressure spring, 233-moving arc contact seat, 234-moving arc contact, 241-limiting plate, 2411-fixed part, 2412-limiting part, 2413-blocking part, 31-base, 32-lower busbar, 33-fixed contact, 34-magnetic conduction plate, 35-static arc contact, 36-arc striking angle and 37-magnetic blowing coil.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a contact system of a dc contactor, which includes a line incoming row 1, a moving contact assembly 2 and a fixed contact assembly 3. As shown in fig. 3, the incoming line row 1 comprises a base 12, an upper busbar 11 and a flexible connection joint 13, wherein the upper busbar 11 and the flexible connection joint 13 are both fixed on the base 12. As shown in fig. 4, the moving contact assembly 2 includes a moving contact mechanism 22 and an arc contact mechanism 23, the moving contact mechanism 22 includes a contact plate 221 and a moving contact 224, one end of the contact plate 221 is connected with the flexible connection joint 13, the other end is bent downward and connected with the moving contact 224, and the moving contact 224 has a connecting section attached to the bending section of the contact plate 221 and a contact section extending horizontally from the connecting section. The arcing contact mechanism 23 comprises a limiting plate 25, a moving arcing contact seat 233 and a moving arcing contact 234, wherein the limiting plate 25 is fixedly connected with the moving contact 224, a positioning pin 231 is fixed on the limiting plate 25, one end of the moving arcing contact seat 233 is sleeved on the positioning pin 231, the other end of the moving arcing contact seat 234 is fixed on the other end of the moving arcing contact seat, an arcing contact pressure spring 232 is sleeved on the positioning pin 231, the lower end of the arcing contact pressure spring 232 is abutted to the moving arcing contact seat 233, the upper end of the arcing contact pressure spring 232 is abutted to the top retainer ring of the positioning pin 231, the moving contact 224 and the moving arcing contact seat 233 are electrically connected through a copper braided wire 24, in the embodiment, the limiting plate 25 is made of a conductive material and is in contact with the moving contact 224 to be electrically connected, and the copper braided wire 24 is respectively connected with the limiting plate 25 and the moving arcing contact seat 233 in a welding mode, and good electrical conductivity between the moving contact 224 and the moving arcing contact seat 233 is achieved. The fixed contact assembly 3 comprises a fixed contact 33 corresponding to the moving contact 224 and a fixed arc contact 35 corresponding to the moving arc contact 234, and the main contact assembly and the arc contact assembly are matched, so that stable heavy current carrying can be realized. The moving arc contact seat 233 can slide relative to the positioning pin 231 and is only fixed by the counterforce action of the arc contact pressure spring 232, so that the moving arc contact 234 can elastically act within a certain range, the actuation is that the arc contact is firstly closed and then closed, the main contact is firstly opened and then opened in the opening process, the arc-free breaking of the main contact is realized, the purpose of protecting the main contact is realized, the function of automatic catering compensation is finished, and the reliability of contact connection is ensured.
As shown in fig. 4, as a preferred embodiment, the moving contact mechanism 22 further includes a driving plate 21 located below the contact plate 221, two ends of the driving plate 21 are respectively fixed to the contact plate 221 by bolts, a space is provided between the driving plate 21 and the contact plate 221, a pin shaft 222 passes through the contact plate 221 and the driving plate 21, two ends of the pin shaft 222 are provided with stop rings, a part of the pin shaft 222 passing through the contact plate 221 is sleeved and fixed with a contact spring 223, one end of the contact spring 223 is abutted against the stop ring at the upper end of the pin shaft 222, and the other end is abutted against the contact plate 221, so that sufficient contact pressure is provided for main contact of the contactor, and the contact is safe and reliable. The driving plate 21 may adopt an armature, and the coil and the armature are attracted to realize the ascending and descending of the driving plate 21, so as to drive the contact plate 221, the moving contact 224 and the moving arc contact 234 to ascend and descend, so as to realize the connection between the moving contact 224 and the fixed contact 33 and the connection between the moving arc contact 234 and the fixed arc contact 35.
As shown in fig. 4, in the preferred embodiment, the limiting plate 25 includes a fixing portion 251 attached to the moving contact 224 and a limiting portion 252 connected to the fixing portion 251, the positioning pin 231 is fixed to the limiting portion 252, and the fixing portion 251, the connecting section of the moving contact 224 and the contact plate 221 are fixedly connected by the same bolt, so that the fixing is convenient. Further, the two ends of the limiting portion 252 are respectively provided with a blocking portion 253 extending upward, so as to limit the moving arc contact seat 233 to the left and right.
As shown in fig. 4, as a preferred embodiment, the moving arc contact seat 233 is bent, and the contact surface of the moving arc contact 234 is lower than the contact surface of the moving contact 224 due to the bent shape, so that the actuation is an actuation sequence that the main arc contact is closed first and then closed, and the main arc contact is opened first and then opened when opened. As a preferable aspect of this embodiment, the contact surface of the moving contact 224 is an arc surface, and the contact surface of the static contact 33 is a plane, so as to achieve reliable contact of the main contact of the contactor. As a preferred embodiment of the present invention, the contact surface of the static arc contact 35 is an inclined surface, the contact surface of the moving arc contact 234 is an inclined surface matched with the contact surface of the static arc contact 35, and the moving arc contact can slide relatively in the switching-on and switching-off process, so that dust, careful sundries and surface oxide layers can be automatically removed, electric shock fusion welding phenomenon can be prevented, and the service life of the contact can be effectively prolonged.
As shown in fig. 5, further, the static contact assembly 3 includes a base 31, a lower busbar 32, an arc striking angle 36, a magnetic conduction plate 34 and a magnetic blowing coil 37, the static contact 33 is welded on the lower busbar 32, the static arc contact 35 is riveted on the arc striking angle 36, the static contact 33 and the static arc contact 35 are directly fixed on the base 31 through fastening screws, the magnetic blowing coil 37 is fixed with the magnetic conduction plate 34, the magnetic blowing coil 37 is located between the lower busbar 32 and the arc striking angle 36, and two leads of the magnetic blowing coil 37 are respectively connected with the lower busbar 32 and the arc striking angle 36 to realize parallel connection with a main loop, so that the reaction speed of the arc extinguishing system is faster, the reliability is higher, and the breaking capacity of the contact is improved.
In conclusion, the invention has the advantages of long service life, strong breaking capacity, good reliability, compact structure, small volume, convenient installation and maintenance and the like.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The utility model provides a direct current contactor contact system, includes inlet wire row, moving contact subassembly and static contact subassembly, its characterized in that: the wire inlet row comprises a base, an upper busbar and a flexible connection joint, wherein the upper busbar and the flexible connection joint are both fixed on the base, the movable contact assembly comprises a movable contact mechanism and an arc contact mechanism, the movable contact mechanism comprises a contact plate and a movable contact, one end of the contact plate is connected with the flexible connection joint, the other end of the contact plate is connected with the movable contact, the arc contact mechanism comprises a limiting plate, a movable arc contact seat and a movable arc contact, the limiting plate is fixedly connected with the movable contact, a positioning pin is fixed on the limiting plate, one end of the movable arc contact seat is sleeved on the positioning pin, the other end of the movable arc contact seat is fixedly provided with the movable arc contact, the positioning pin is sleeved with an arc contact, the lower end of the arc contact pressure spring is abutted to the movable arc contact seat, the movable contact is electrically connected with the arc contact seat through a copper braid wire, the movable contact assembly comprises a fixed contact corresponding to the movable contact and an arc contact corresponding to the movable arc contact, the contact surface of the fixed contact is an arc contact, and the contact surface of the fixed contact is a contact surface matched with the movable arc surface of the arc contact;
the movable contact assembly further comprises a driving plate positioned at the bottom of the contact plate, and two ends of the driving plate are respectively fixed with the contact plate through bolts; the driving plate and the contact plate are provided with a space, a pin shaft penetrates through the contact plate and the driving plate, two ends of the pin shaft are provided with stop rings, and a part of the pin shaft penetrating out of the contact plate is sleeved and fixed with a contact spring.
2. The direct current contactor contact system according to claim 1, wherein: the limiting plate comprises a fixing part attached to the movable contact and a limiting part connected with the fixing part, the locating pin is fixed on the limiting part, and the fixing part, the movable contact and the contact plate are fixedly connected through bolts.
3. The direct current contactor contact system according to claim 2, wherein: both ends of the limiting part are respectively provided with a stop part extending upwards.
4. The direct current contactor contact system according to claim 1, wherein: the contact surface of the moving arc contact is lower than that of the moving contact.
5. The direct current contactor contact system according to claim 1, wherein: the contact surface of the moving contact is an arc surface, and the contact surface of the static contact is a plane.
6. The direct current contactor contact system according to claim 1, wherein: the static contact assembly further comprises a lower busbar, an arc striking angle and a magnetic blowing coil, wherein the magnetic blowing coil is located between the lower busbar and the arc striking angle, two leads of the magnetic blowing coil are respectively connected with the lower busbar and the arc striking angle, the static contact is welded on the lower busbar, and the static arc contact is riveted on the arc striking angle.
7. The direct current contactor contact system according to claim 6, wherein: the static contact assembly further comprises a magnetic conduction plate, and the magnetic blowing coil is fixed with the magnetic conduction plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711471061.6A CN108133868B (en) | 2017-12-29 | 2017-12-29 | Direct current contactor contact system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711471061.6A CN108133868B (en) | 2017-12-29 | 2017-12-29 | Direct current contactor contact system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108133868A CN108133868A (en) | 2018-06-08 |
| CN108133868B true CN108133868B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711471061.6A Active CN108133868B (en) | 2017-12-29 | 2017-12-29 | Direct current contactor contact system |
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| CN (1) | CN108133868B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114203492A (en) * | 2021-12-23 | 2022-03-18 | 江苏其厚智能电气设备有限公司 | Plastic shell type circuit breaker contact system with arc contacts |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108133868A (en) | 2018-06-08 |
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