CN221040954U - DC load switch - Google Patents
DC load switch Download PDFInfo
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- CN221040954U CN221040954U CN202322698771.XU CN202322698771U CN221040954U CN 221040954 U CN221040954 U CN 221040954U CN 202322698771 U CN202322698771 U CN 202322698771U CN 221040954 U CN221040954 U CN 221040954U
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- contact
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- moving
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- 230000003068 static effect Effects 0.000 claims abstract description 60
- 230000005284 excitation Effects 0.000 claims abstract description 17
- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 13
- 238000010992 reflux Methods 0.000 abstract description 8
- 230000001737 promoting effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a direct current load switch, which comprises a contact mechanism, an operating mechanism, an arc striking mechanism and an arc extinguishing chamber; the contact mechanism comprises a moving contact assembly and a fixed contact assembly, wherein the moving contact assembly comprises a fixed bracket, a rotating bracket, a moving contact, a moving arc contact and a moving main busbar; the operating mechanism is connected with the rotating bracket and is used for driving the rotating bracket to rotate; the arc striking mechanism comprises a reflux row, an excitation block, a front arc striking row and a rear arc striking row; the arc extinguishing chamber is arranged outside the front arc striking row and the rear arc striking row. The beneficial effects of the utility model are as follows: in the later period of breaking, the current loop flows through the back striking row, the front striking row and the reflux row by the static main row, and then flows through the dynamic main row to form a complete reflux channel, the electric arc jumps to the back striking row and the front striking row and is extinguished by the arc extinguishing chamber, so that the stop arc contact and the static arc contact can be prevented from being burnt, and meanwhile, breaking current wraps the exciting block on the front striking row to generate electromotive force upward to the electric arc, thereby promoting the electric arc to move upward rapidly and accelerating the arc extinguishing.
Description
Technical Field
The utility model relates to the technical field of load switches, in particular to a direct current load switch.
Background
A load switch is a switching device for controlling a load in a circuit. It is commonly installed in electrical power systems, industrial equipment, and home circuits for implementing switching control of loads in the circuit. The load switch has the characteristics of high reliability, simple operation, safety, reliability and the like, and is widely applied to various fields, and the direct current load switch is applied to a direct current circuit.
The existing direct current load switch is provided with a moving arc contact on a moving contact, a static arc contact on a static contact, and the moving contact and the static contact are protected through the moving arc contact and the static arc contact. However, when the switch needs to be broken under load, the electric arcs generated at the moving arc contact and the static arc contact are large, and the moving arc contact and the static arc contact are easy to burn.
Disclosure of utility model
In view of the foregoing, it is necessary to provide a dc load switch to solve the technical problem that when the switch needs to be broken under load, the electric arcs generated at the moving arc contact and the static arc contact are large, and the moving arc contact and the static arc contact are easy to burn.
In order to achieve the above purpose, the utility model provides a direct current load switch, which comprises a contact mechanism, an operating mechanism, an arc striking mechanism and an arc extinguishing chamber;
the contact mechanism comprises a moving contact assembly and a fixed contact assembly, the moving contact assembly comprises a fixed support, a rotating support, a moving contact, a moving arc contact and a moving main busbar, the rotating support is hinged to the fixed support, the moving contact is installed on the rotating support, the moving arc contact is connected with the moving contact, the moving main busbar is fixed on the fixed support and is electrically connected with the moving contact, the fixed contact assembly comprises a fixed contact, a static arc contact and a static main busbar, the static arc contact is fixed on the fixed contact, and the static main busbar is electrically connected with the fixed contact;
the operating mechanism is connected with the rotating bracket and is used for driving the rotating bracket to rotate;
The arc striking mechanism comprises a backflow row, an excitation block, a front arc striking row and a rear arc striking row, wherein one end of the backflow row is fixed on the fixed support and is electrically connected with the movable main busbar, the excitation block is fixed on the other end of the backflow row, one end part of the front arc striking row is coated on one end of the excitation block, and the rear arc striking row is fixed on the static arc contact;
the arc extinguishing chamber is arranged outside the front arc striking row and the rear arc striking row.
The movable arc contact is hinged to the movable contact;
In some embodiments, the moving contact assembly further includes a first elastic member, one end of the first elastic member is connected to the moving arc contact, and the other end of the first elastic member is connected to the rotating bracket.
In some embodiments, the number of the backflow rows is two, the upper ends of the two backflow rows are respectively fixed on two sides of the excitation block, and the lower ends of the two backflow rows are electrically connected with the primary-secondary rows.
In some embodiments, a connection plate is fixed on the excitation block, and the connection plate is fixedly connected with the upper end of the backflow row.
In some embodiments, the operating mechanism comprises an operating shell and an operating cylinder, wherein the fixed end of the operating cylinder is hinged in the operating shell, and the output shaft of the operating cylinder is hinged with the rotating bracket.
In some embodiments, a connection part is formed on the rotating bracket, and an output shaft of the operating cylinder is hinged with the connection part.
In some embodiments, the movable main busbar is electrically connected to the movable contact via a flexible connection.
In some embodiments, the flexible connection is a copper strand.
In some embodiments, the rear strike row is secured to the static arcing contact via a set screw.
In some embodiments, the static arcing contact is fixed to the static main busbar via an angle iron.
Compared with the prior art, the technical scheme provided by the utility model has the beneficial effects that: when the switch needs to be broken by load, the current loop flows through the moving arc contact and the moving contact by the static main busbar at the early stage of breaking, and then flows through the moving main busbar to form a complete reflux channel, and at the moment, the electric arc is burnt between the moving arc contact and the static arc contact. In the later period of breaking, the current loop flows through the back striking row, the front striking row and the reflux row by the static main row, and then flows through the dynamic main row to form a complete reflux channel, at the moment, the electric arc jumps to the back striking row and the front striking row and is extinguished by the arc extinguishing chamber, so that the stop arc contact and the static arc contact can be prevented from being burnt, and meanwhile, breaking current wraps the exciting block on the front striking row to generate electromotive force upward to the electric arc, thereby promoting the electric arc to move upward rapidly and accelerating the arc extinguishing.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of a dc load switch according to the present utility model;
Fig. 2 is a schematic perspective view of the dc load switch of fig. 1 with a portion of the operating housing omitted;
fig. 3 is a schematic perspective view of the dc load switch in fig. 2, with the arc striking mechanism omitted, and the arc extinguishing chamber;
FIG. 4 is a schematic perspective view of the contact mechanism and arcing mechanism of FIG. 2;
FIG. 5 is a schematic perspective view of the contact mechanism of FIG. 4;
FIG. 6 is a schematic view of the current trend of FIG. 4 during the early stage of breaking;
FIG. 7 is a schematic view of the current flow in FIG. 4 after breaking;
In the figure: 1-contact mechanism, 11-moving contact assembly, 111-fixed support, 112-rotating support, 1121-connecting portion, 113-moving contact, 114-moving arc contact, 115-moving main busbar, 117-flexible connection, 12-fixed contact assembly, 121-fixed contact, 122-fixed arc contact, 1221-angle iron, 123-fixed main busbar, 2-operating mechanism, 21-operating shell, 3-arc striking mechanism, 31-backflow busbar, 32-excitation block, 321-connecting plate, 33-front arc striking row, 34-rear arc striking row, 341-set screw, 4-arc extinguishing chamber.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1-7, the present utility model provides a dc load switch, which includes a contact mechanism 1, an operating mechanism 2, an arc striking mechanism 3 and an arc extinguishing chamber 4;
The contact mechanism 1 comprises a moving contact assembly 11 and a fixed contact assembly 12, wherein the moving contact assembly 11 comprises a fixed support 111, a rotating support 112, a moving contact 113, a moving arc contact 114 and a moving main busbar 115, the rotating support 112 is hinged to the fixed support 111, the moving contact 113 is mounted on the rotating support 112, the moving arc contact 114 is connected to the moving contact 113, the moving main busbar 115 is fixed to the fixed support 111 and is electrically connected with the moving contact 113, the fixed contact assembly 12 comprises a fixed contact 121, a fixed arc contact 122 and a fixed main busbar 123, the fixed arc contact 122 is fixed to the fixed contact 121, and the fixed main busbar 123 is electrically connected with the fixed contact 121;
The operating mechanism 2 is connected with the rotating bracket 112 and is used for driving the rotating bracket 112 to rotate;
The arc striking mechanism 3 comprises a backflow row 31, an excitation block 32, a front arc striking row 33 and a rear arc striking row 34, wherein one end of the backflow row 31 is fixed on the fixed bracket 111 and is electrically connected with the movable main busbar 115, the excitation block 32 is fixed on the other end of the backflow row 31, one end part of the front arc striking row 33 is coated on one end of the excitation block 32, and the rear arc striking row 34 is fixed on the static arc contact 122;
The arc extinguishing chamber 4 is covered outside the front arc striking row 33 and the rear arc striking row 34.
When the switching-on mechanism is used, the operating mechanism 2 executes a switching-on command, the crank arm on the operating mechanism 2 pushes the rotating bracket 112 to rotate towards the direction of the fixed contact 121, the moving arc contact 114 is contacted with the fixed arc contact 122 firstly, and the moving contact 113 is contacted with the fixed contact 121 after that, so that the switching-on action is completed; the operating mechanism 2 executes a brake-separating command, the crank arm on the operating mechanism 2 pushes the rotating bracket 112 to reversely rotate, the moving contact 113 is separated from the static contact 121 firstly, and the moving arc contact 114 is separated from the static arc contact 122, so that when the brake is closed and separated, no electric arc is generated at the contact position of the moving contact 113 and the static contact 121, the moving contact 113 and the static contact 121 are protected, the excessive burning loss is prevented, and the service life of the switch is influenced;
When the switch needs to be broken by load, in the early stage of breaking, the current loop flows through the moving arc contact 114 and the moving contact 113 from the static main busbar 123 and then flows through the moving main busbar 115 to form a complete reflux channel, and at the moment, an electric arc burns between the moving arc contact 114 and the static arc contact 122 (as shown in fig. 6). At the later stage of breaking, the current loop flows through the rear striking row 34, the front striking row 33 and the backflow row 31 by the static main row 123, and then flows through the moving main row 115 to form a complete backflow channel, at this time, the arc jumps up the rear striking row 34 and the front striking row 33 (as shown in fig. 7) and is extinguished by the arc extinguishing chamber 4, so that the stop arc contact 114 and the static arc contact 122 can be prevented from being burnt, and meanwhile, breaking current wraps the exciting block 32 on the front striking row 33 to generate upward electromotive force for the arc, thereby promoting the rapid upward movement of the arc and accelerating the arc extinguishing.
According to the utility model, the rear arc striking row 34 is fixed on the static arc contact 122, the front arc striking row 33 which is opposite to the rear arc striking row 34 is arranged, the front arc striking row 33 is partially coated on the exciting block 32, the exciting block 32 is electrically connected with the movable main bus 115 through the backflow row 31, so that a complete backflow channel is formed, an arc can be led between the rear arc striking row 34 and the front arc striking row 33 which are positioned in the arc extinguishing chamber 4, and the arc extinguishing chamber 4 is used for extinguishing the arc, meanwhile, breaking current wraps the exciting block 32 on the front arc striking row 33, so that upward electromotive force is generated for the arc, the rapid upward movement of the arc is promoted, the arc extinguishing is accelerated, the arc striking effect on the arc during carrying breaking is improved, and the breaking performance is improved.
In order to specifically implement the connection between the moving arcing contact 114 and the moving contact 113, referring to fig. 5, in a preferred embodiment, the moving arcing contact 114 is hinged to the moving contact 113; the moving contact assembly 11 further comprises a first elastic member, one end of the first elastic member is connected with the moving arc contact 114, the other end of the first elastic member is connected with the rotating bracket 112, when in use, the operating mechanism 2 executes a closing command during closing, the operating mechanism 2 drives the rotating bracket 112 to rotate, when the rotating bracket 112 rotates to a first preset position, the moving arc contact 114 starts to abut against the static arc contact 122, the rotating bracket 112 continues to rotate, the first elastic member is compressed, when the rotating bracket 112 continues to rotate in the same direction to a second preset position, the moving contact 113 starts to abut against the static contact 121, the closing action is completed, when the moving contact 113 contacts the static contact 121, a circuit is already communicated, and no electric arc is generated; when the switch is opened, the operating mechanism 2 executes a switch opening command, the operating mechanism 2 drives the rotating bracket 112 to reversely rotate, at the moment, the moving contact 113 is separated from the static contact 121, and the first elastic piece is in a compressed state at the moment, so that when the moving contact 113 is separated from the static contact 121, the moving arc contact 114 is in an abutting state with the static arc contact 122, a circuit is not disconnected, no electric arc is generated, when the rotating bracket 112 continues to reversely rotate, after the first elastic piece is restored to a natural length, the moving arc contact 114 is separated from the static arc contact 122, at the moment, the circuit is disconnected, the generated electric arc only is applied to the moving arc contact 114 and the static arc contact 122, and the influence on the moving contact 113 and the static contact 121 is avoided, so that the moving contact 113 and the static contact 121 can be protected to the greatest extent, the burning loss is avoided, and the service life of the switch is influenced.
In order to improve the backflow effect, referring to fig. 4, in a preferred embodiment, the number of the backflow rows 31 is two, the upper ends of the two backflow rows 31 are respectively fixed on two sides of the excitation block 32, and the lower ends of the two backflow rows 31 are electrically connected with the primary and secondary rows 115.
In order to specifically realize the fixed connection between the upper end of the backflow bar 31 and the excitation block 32, referring to fig. 4, in a preferred embodiment, a connection plate 321 is fixed on the excitation block 32, and the connection plate 321 is fixedly connected to the upper end of the backflow bar 31.
In order to specifically implement the function of the operating mechanism 2, referring to fig. 3 and 4, in a preferred embodiment, the operating mechanism 2 includes an operating housing 21 and an operating cylinder (not shown), a fixed end of the operating cylinder is hinged in the operating housing 21, an output shaft of the operating cylinder is hinged with the rotating bracket 112, and in use, the rotating bracket 112 is rotated by extending and retracting the output shaft of the operating cylinder.
In order to specifically realize the hinge connection between the output shaft of the operating cylinder and the rotating bracket 112, referring to fig. 3 and 4, in a preferred embodiment, a connection portion 1121 is formed on the rotating bracket 112, and the output shaft of the operating cylinder is hinged to the connection portion 1121.
In order to specifically implement the electrical connection between the movable main busbar 115 and the movable contact 113, referring to fig. 4 and 5, in a preferred embodiment, the movable main busbar 115 is electrically connected to the movable contact 113 through a flexible connection 117.
In order to implement the function of the flexible connection 117, referring to fig. 4 and 5, in a preferred embodiment, the flexible connection 117 is a copper stranded wire.
To specifically fix the static arc contacts 122 to the rear arc striking row 34, referring to fig. 4, in a preferred embodiment, the rear arc striking row 34 is fixed to the static arc contacts 122 by a fixing screw 341.
To improve stability of the static arc contacts 122, referring to fig. 4, in a preferred embodiment, the static arc contacts 122 are fixed to the static main busbar 123 via an angle iron 1221.
For a better understanding of the present utility model, the following details of the operation of the dc load switch provided by the present utility model are described with reference to fig. 1 to 7: when the switch needs to be broken by load, in the early stage of breaking, the current loop flows through the moving arc contact 114 and the moving contact 113 from the static main busbar 123 and then flows through the moving main busbar 115 to form a complete reflux channel, and at the moment, an electric arc burns between the moving arc contact 114 and the static arc contact 122 (as shown in fig. 6). At the later stage of breaking, the current loop flows through the rear striking row 34, the front striking row 33 and the backflow row 31 by the static main row 123, and then flows through the moving main row 115 to form a complete backflow channel, at this time, the arc jumps up the rear striking row 34 and the front striking row 33 (as shown in fig. 7) and is extinguished by the arc extinguishing chamber 4, so that the stop arc contact 114 and the static arc contact 122 can be prevented from being burnt, and meanwhile, breaking current wraps the exciting block 32 on the front striking row 33 to generate upward electromotive force for the arc, thereby promoting the rapid upward movement of the arc and accelerating the arc extinguishing.
According to the utility model, the rear arc striking row 34 is fixed on the static arc contact 122, the front arc striking row 33 which is opposite to the rear arc striking row 34 is arranged, the front arc striking row 33 is partially coated on the exciting block 32, the exciting block 32 is electrically connected with the movable main bus 115 through the backflow row 31, so that a complete backflow channel is formed, an arc can be led between the rear arc striking row 34 and the front arc striking row 33 which are positioned in the arc extinguishing chamber 4, and the arc extinguishing chamber 4 is used for extinguishing the arc, meanwhile, breaking current wraps the exciting block 32 on the front arc striking row 33, so that upward electromotive force is generated for the arc, the rapid upward movement of the arc is promoted, the arc extinguishing is accelerated, the arc striking effect on the arc during carrying breaking is improved, and the breaking performance is improved.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. The direct current load switch is characterized by comprising a contact mechanism, an operating mechanism, an arc striking mechanism and an arc extinguishing chamber;
the contact mechanism comprises a moving contact assembly and a fixed contact assembly, the moving contact assembly comprises a fixed support, a rotating support, a moving contact, a moving arc contact and a moving main busbar, the rotating support is hinged to the fixed support, the moving contact is installed on the rotating support, the moving arc contact is connected with the moving contact, the moving main busbar is fixed on the fixed support and is electrically connected with the moving contact, the fixed contact assembly comprises a fixed contact, a static arc contact and a static main busbar, the static arc contact is fixed on the fixed contact, and the static main busbar is electrically connected with the fixed contact;
the operating mechanism is connected with the rotating bracket and is used for driving the rotating bracket to rotate;
The arc striking mechanism comprises a backflow row, an excitation block, a front arc striking row and a rear arc striking row, wherein one end of the backflow row is fixed on the fixed support and is electrically connected with the movable main busbar, the excitation block is fixed on the other end of the backflow row, one end part of the front arc striking row is coated on one end of the excitation block, and the rear arc striking row is fixed on the static arc contact;
the arc extinguishing chamber is arranged outside the front arc striking row and the rear arc striking row.
2. The direct current load switch of claim 1, wherein the moving arcing contact is hinged to the moving contact;
The movable contact assembly further comprises a first elastic piece, one end of the first elastic piece is connected with the movable arc contact, and the other end of the first elastic piece is connected with the rotating support.
3. The direct current load switch according to claim 1, wherein the number of the backflow rows is two, the upper ends of the two backflow rows are respectively fixed on two sides of the excitation block, and the lower ends of the two backflow rows are electrically connected with the movable main bus.
4. The direct current load switch according to claim 1, wherein a connection plate is fixed to the excitation block, and the connection plate is fixedly connected to an upper end of the return line.
5. The direct current load switch of claim 1, wherein the operating mechanism comprises an operating housing and an operating cylinder, a fixed end of the operating cylinder is hinged in the operating housing, and an output shaft of the operating cylinder is hinged with the rotating bracket.
6. The direct current load switch according to claim 5, wherein a connection portion is formed on the rotating bracket, and an output shaft of the operation cylinder is hinged to the connection portion.
7. The direct current load switch of claim 1, wherein the movable main busbar is electrically connected to the movable contact via a flexible connection.
8. The direct current load switch of claim 7, wherein the flexible connection is a copper strand.
9. The direct current load switch of claim 1, wherein the rear strike row is secured to the static arcing contact via a set screw.
10. The direct current load switch of claim 1, wherein the static arcing contact is fixed to the static main busbar via an angle iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322698771.XU CN221040954U (en) | 2023-10-07 | 2023-10-07 | DC load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322698771.XU CN221040954U (en) | 2023-10-07 | 2023-10-07 | DC load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221040954U true CN221040954U (en) | 2024-05-28 |
Family
ID=91179363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322698771.XU Active CN221040954U (en) | 2023-10-07 | 2023-10-07 | DC load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221040954U (en) |
-
2023
- 2023-10-07 CN CN202322698771.XU patent/CN221040954U/en active Active
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| GR01 | Patent grant | ||
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