CN210015798U - Bridge type moving contact dual-power automatic transfer switch - Google Patents
Bridge type moving contact dual-power automatic transfer switch Download PDFInfo
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- CN210015798U CN210015798U CN201821919734.XU CN201821919734U CN210015798U CN 210015798 U CN210015798 U CN 210015798U CN 201821919734 U CN201821919734 U CN 201821919734U CN 210015798 U CN210015798 U CN 210015798U
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Abstract
A bridge type moving contact dual-power automatic transfer switch comprises an electromagnetic driving rod mechanism and a contact arc extinguishing mechanism. The contact arc extinguishing mechanism comprises an action rotating shaft, a connecting crank sleeved at the end of the action rotating shaft and an action connecting rod vertically hinged at the end of the connecting crank, wherein a bridge-type moving contact is arranged in a hollow part of the action connecting rod, a compression spring is arranged at the upper part of the bridge-type moving contact, a pair of fixed contacts are correspondingly arranged at the lower part of the bridge-type moving contact, and a left arc extinguishing chamber and a right arc extinguishing chamber are independently arranged between the bridge-type moving contact and the fixed contacts. The two ends of the bridge-type moving contact are provided with the conductive contacts, so that the conductive loop of the moving contact has two breaking points, two arc voltages are generated after the loop is broken, and the arc extinguishing and current limiting effects of the double power supplies are improved, so that the on-off current capacity of the double power supplies is improved.
Description
Technical Field
The utility model relates to a low-voltage apparatus, concretely relates to dual supply automatic transfer switch.
Background
The dual-power automatic transfer switch is a commonly used low-voltage electrical appliance, and is commonly used for the transfer between two power supplies so as to ensure that when one power supply fails or stops supplying power, the other power supply can be rapidly switched to ensure that a load loop supplies power normally. The moving contact of a common dual-power automatic transfer switch is a finger-type flexible connection moving contact, only one breaking point is arranged between the moving contact and a static contact in a load loop, electric arc is large when fault current is broken, and meanwhile, due to the fact that the mechanical action life of flexible connection is short, the breaking capacity of the fault current of the dual-power automatic transfer switch and the service life of the dual-power automatic transfer switch are limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's drawback, disclose a bridge type moving contact dual supply automatic transfer switch.
In order to realize the above purpose, the utility model discloses the technical scheme who adopts is:
a bridge type moving contact dual-power automatic transfer switch comprises an electromagnetic driving rod mechanism and a contact arc extinguishing mechanism. The electromagnet of the electromagnetic driving lever mechanism receives the control signal action of the dual-power automatic transfer switch, drives the action lever to enable the action rotating shafts of the common power supply and the standby power supply to rotate at different angles, and enables the moving contact and the static contact of the dual-power automatic transfer switch to be switched on and switched off.
Further setting, contact arc extinguishing mechanism include the power contact arc extinguishing mechanism and the stand-by power supply contact arc extinguishing mechanism commonly used that the structure is the same, power contact arc extinguishing mechanism and stand-by power supply contact arc extinguishing mechanism commonly used close and put in the utmost point box, and two or more utmost point boxes can be set up to two power automatic transfer switch to satisfy the needs of different loads.
The common power supply contact arc extinguishing mechanism and the standby power supply contact arc extinguishing mechanism respectively comprise an action rotating shaft, a connecting crank is sleeved at the end of the action rotating shaft, and is vertically hinged to an action connecting rod at the end of the connecting crank, a bridge type moving contact is arranged in a hollow part of the action connecting rod, a compression spring is arranged on the upper part of the bridge type moving contact, the compression spring can achieve the purpose of elastic contact pressure with a fixed contact at the lower part when the double-power supply automatic transfer switch is switched on, and plays a role of simultaneously breaking a pair of contacts at two ends of the balanced bridge type moving contact and a pair of fixed contacts at the lower part when the double-power supply automatic transfer switch is switched off, so that the stability of the double-power supply work is facilitated, a pair of fixed contacts is correspondingly arranged on the lower part of the.
The action connecting rod is pressed by insulating materials and is divided into three sections, the upper section is hinged with the connecting crank through a hinge pin, a bridge type moving contact is arranged in the hollow part of the middle section, a compression spring is arranged on the upper part of the bridge type moving contact, and the bridge type moving contact is clamped in the hollow part of the action connecting rod through the compression spring.
The bridge type moving contact is characterized in that a conductor is arranged in the middle of the bridge type moving contact, two ends of the conductor are provided with upturned arc guide angles, two ends of the lower portion of the conductor are welded with high-temperature-resistant and wear-resistant silver alloy contacts, a compression spring bearing plate is arranged on the upper portion of the conductor, and the bridge type moving contact is clamped in a hollow portion of the action connecting rod through a compression spring on the bearing plate.
The bridge type moving contact is characterized in that a pair of fixed contacts are arranged on the lower portion of the bridge type moving contact, the fixed contacts are in a bow shape, the two fixed contacts are arranged in a back-to-back mode, a contact welding platform is arranged on the upper portion of each fixed contact, a high-temperature-resistant and wear-resistant silver alloy contact is welded on the contact welding platform, a moving contact connecting piece of a dual-power automatic transfer switch is connected to the lower portion of one fixed contact, and a static contact connecting piece of the dual-power automatic transfer switch is connected to the lower portion of the other fixed contact.
The arc extinguishing chamber is enclosed inside the moving contact connecting sheet, the lower end of the moving contact connecting sheet is provided with a mounting platform of the fixed contact, the mounting platform is welded with a high-temperature-resistant and wear-resistant silver alloy contact, and the upper end of the moving contact connecting sheet is provided with a moving contact wiring bolt with double power supplies.
The lower end of the static contact connecting sheet is provided with a fixed contact mounting surface, the pair of fixed contacts are oppositely fastened on the mounting surface, and the upper end of the static contact connecting sheet is provided with a static contact wiring bolt with double power supplies.
The arc extinguishing device is characterized in that a left arc extinguishing chamber and a right arc extinguishing chamber are independent and arranged between the bridge type moving contact and the fixed contact, arc extinguishing pieces of the arc extinguishing chambers are rectangular and are arranged in the arc extinguishing chambers in parallel, a U-shaped arc inlet is formed in one end of each arc extinguishing piece, and the bridge type moving contact is arranged in the U-shaped arc inlets of the left arc extinguishing chamber and the right arc extinguishing chamber.
The bridge type moving contact double-power-supply automatic change-over switch with the structure has the beneficial effects that:
1) because the two ends of the bridge-type moving contact are provided with the conductive contacts, the conductive loop of the moving contact is provided with two breaking points, two effective arc extinguishing areas are generated, and the arc extinguishing effect is good; 2) because two breaking points are generated after the loop is cut off, two arc voltages are correspondingly generated, an arc is generated according to the arc theory, namely a large resistor is generated, and when short-circuit current comes, the arc can consume and absorb a large amount of arc energy, so that the purpose of current limiting is achieved, the arc energy consumed by the double-breaking-point structure is doubled compared with the arc energy consumed by the traditional single-breaking-point structure, and the on-off current capability of the dual-power-supply automatic transfer switch can be obviously improved; 3) because the moving contact connecting piece is with the explosion chamber inclusion in the bow-shaped inboard, simultaneously because the arc extinguishing piece parallel arrangement, the moving contact connecting piece will produce electric arc suction when breaking electric current and make electric arc smoothly pass through the arc extinguishing piece, is favorable to the electric arc extinguishing of dual supply. 4) Because the moving contact of the utility model does not need the flexible connection external connection, the mechanical life is greatly improved compared with a single-breakpoint finger-shaped contact.
Because the utility model has the characteristics of above, the event can show the break-make current ability that improves dual supply automatic transfer switch and dual supply automatic transfer switch's life for this bridge type moving contact dual supply automatic transfer switch.
Drawings
FIG. 1 is a general structure diagram of the dual power supply of the present invention;
fig. 2 is an overall structure diagram of the contact arc extinguishing mechanism in fig. 1;
FIG. 3 is a plan view of the structure of FIG. 2;
FIG. 4 is a block diagram of the arc chute and the removable pole box of FIG. 2;
FIG. 5 is a view of the action link of FIG. 2;
fig. 6 is a structural view of the bridge type moving contact in fig. 2;
FIG. 7 is a structural view of the arc chute of FIG. 2;
figure 8 is a structural view of the arc plate of figure 7.
Detailed Description
It should be noted that the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "common power source" and "backup power source" are used only for description of a location with respect to the drawing sheet, and are not to be understood as indicating or implying an inherent characteristic name of the location in actual use.
The present invention will be further explained below with reference to fig. 1 to 8 by way of specific examples.
A bridge type moving contact double-power-supply automatic transfer switch is shown in figure 1 and comprises an electromagnetic driving lever mechanism 1 and a contact arc extinguishing mechanism 2. An electromagnet of the electromagnetic driving rod mechanism 1 receives the control signal action of the dual-power automatic transfer switch, drives the action rod to enable a common power supply action rotating shaft or a standby power supply action rotating shaft of the contact arc extinguishing mechanism 2 to rotate in different directions, and enables a moving contact and a static contact of the dual-power automatic transfer switch to be switched on and switched off.
Further setting, as shown in fig. 2, the contact arc extinguishing mechanism includes a common power contact arc extinguishing mechanism and a standby power contact arc extinguishing mechanism which are the same in structure, the common power contact arc extinguishing mechanism and the standby power contact arc extinguishing mechanism are combined in the pole box 20 of the dual-power automatic transfer switch, and the dual-power automatic transfer switch can be provided with two or more pole boxes to meet the requirements of different loads.
Further, as shown in fig. 2 to 4, the common power contact arc extinguishing mechanism includes a common power action rotating shaft 201, a common power connection crank 202 sleeved at the common power action rotating shaft 201, a common power action connecting rod 207 vertically hinged at the common power connection crank 202, a common power bridge moving contact 206 disposed in a hollow portion of the common power action connecting rod 207, a common power bridge moving contact compression spring 208 disposed at an upper portion of the common power bridge moving contact 206, a pair of common power fixed contacts 209 disposed at a lower portion of the common power bridge moving contact 206, and two left and right independent common power arc extinguishing chambers 205 disposed between the common power bridge moving contact 206 and the common power fixed contacts 209;
the backup power supply contact arc extinguishing mechanism comprises a backup power supply action rotating shaft 211, a backup power supply connecting crank 212 sleeved at the backup power supply action rotating shaft 211, a backup power supply action connecting rod 217 vertically hinged at the backup power supply connecting crank 212, a backup power supply bridge type moving contact 216 arranged in a hollow part of the backup power supply action connecting rod 217, a backup power supply bridge type moving contact compression spring 218 arranged at the upper part of the backup power supply bridge type moving contact 216, a pair of backup power supply fixed contacts 219 correspondingly arranged at the lower part of the backup power supply bridge type moving contact 216, and a left backup power supply arc extinguishing chamber 215 and a right backup power supply arc extinguishing chamber 215 which are independent are arranged between the backup power supply bridge type moving contact.
Further, as shown in fig. 5, the common power supply action link 207 and the standby power supply action link are pressed by an insulating material and divided into three sections, an upper section 2073 is hinged to the connecting crank 202 through a hinge pin 2074, a hollow part 2072 in the middle section is provided with a bridge type moving contact 206, a compression spring 208 is arranged on the upper part of the bridge type moving contact 206, the bridge type moving contact 206 is clamped in the hollow part of the action link 207 through the compression spring 208, and a lower section 2071 is arranged to be hollow, so as to reduce the material usage.
As shown in fig. 6, a conductive body 2064 is disposed in the middle of the bridge-type moving contact 206, an upturned arc angle 2062 is disposed at two ends of the conductive body 2064, a high-temperature-resistant and wear-resistant silver alloy contact 2063 is welded at two ends of the lower portion of the conductive body 2064, a compression spring bearing plate 2061 is disposed at the upper portion of the conductive body 2064, and the bridge-type moving contact 206 is clamped in the hollow portion of the actuating link 207 by a compression spring 208 on the bearing plate 2061.
Further, as shown in fig. 4, a fixed contact 209 is arranged at the lower part of the bridge type moving contact 206, the fixed contact 209 is in a bow shape, two bow-shaped fixed contacts are arranged in a back direction, a contact welding platform is arranged at the upper part of the fixed contact 209, a high-temperature-resistant and wear-resistant silver alloy contact 210 is welded on the contact welding platform, a moving contact connecting sheet 203 of a dual-power automatic transfer switch is connected to the lower part of one fixed contact, and a static contact connecting sheet 204 of the dual-power automatic transfer switch is connected to the lower part of the other fixed contact.
Further, as shown in fig. 2, the moving contact connecting sheet 203 is set to be bow-shaped, the arc extinguish chamber 205 is enclosed inside the moving contact connecting sheet 203, an installation platform for fixing a contact is arranged at one end of the lower part of the moving contact connecting sheet 203, a high-temperature resistant and wear resistant silver alloy contact is welded on the installation platform, and a moving contact wiring bolt 3 for dual power supplies is arranged at the upper end part of the moving contact connecting sheet 203.
Further, a fixed contact mounting surface is arranged at the lower end of the static contact connecting sheet 204, the pair of fixed contacts 209 are oppositely fastened on the fixed contact mounting surface, and a static contact connecting bolt 5 with double power supplies is arranged at the upper end of the static contact connecting sheet.
Further, as shown in fig. 2, 7, and 8, a left arc extinguish chamber 205 and a right arc extinguish chamber 205 which are independent are arranged between the bridge type moving contact 206 and the fixed contact 209, an arc extinguishing piece 2051 of the arc extinguish chamber 205 is rectangular, the arc extinguishing piece 2051 is arranged in parallel in the arc extinguish chamber 205, one end of the arc extinguishing piece 2051 is provided with a U-shaped arc inlet 2052, and the bridge type moving contact 206 is arranged in the U-shaped arc inlet 2052 of the left arc extinguish chamber and the right arc extinguish chamber.
The action program of the double-power automatic transfer switch of the bridge moving contact is as follows:
as shown in fig. 2, when the dual-power automatic transfer switch needs to be opened by a common power supply and closed by a standby power supply, the controller of the dual-power automatic transfer switch provides a corresponding control signal to the electromagnet of the electromagnetic driving lever mechanism to drive the lever mechanism to move, so as to drive the common power supply operation rotating shaft 201 to rotate rightwards, and the common power supply operation crank 202 on the common power supply operation rotating shaft 201 also rotates rightwards, so as to drive the common power supply operation connecting rod 207 at the common power supply operation crank 202 end to move upwards, and the common power supply bridge type moving contact 206 in the hollow part of the common power supply operation connecting rod 207 also moves upwards, so as to be opened with the fixed contact 209 at the lower part, thereby achieving the purpose of opening the common power supply; meanwhile, the electromagnetic driving lever mechanism drives the standby power supply action rotating shaft 211 to rotate rightwards, the standby power supply action crank 212 on the standby power supply action rotating shaft 211 also rotates rightwards, the standby power supply action connecting rod 217 at the end of the standby power supply action crank 212 is driven to move downwards, and the standby power supply bridge type moving contact 216 in the hollow part of the standby power supply action connecting rod 217 also moves downwards, so that the standby power supply bridge type moving contact is switched on with the fixed contact at the lower part, and the purpose of switching on the standby power supply of the dual-power automatic transfer switch is achieved.
Similarly, when the dual-power automatic transfer switch needs to be switched on by a common power supply and switched off by a standby power supply, the controller of the dual-power automatic transfer switch provides a corresponding control signal for the electromagnet of the electromagnetic driving rod mechanism to drive the rod mechanism to act, so as to drive the common power supply action rotating shaft and the standby power supply action rotating shaft to rotate in the other direction, and the action program is as above, so that the dual-power automatic transfer switch needs to be switched on by the common power supply and switched off by the standby power supply.
It should be noted that: the above examples are given solely for the purpose of illustrating the invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that many more modifications and variations than mentioned above may be made without departing from the scope of the invention.
Claims (6)
1. A bridge type moving contact dual-power automatic transfer switch comprises an electromagnetic driving rod mechanism and a contact arc extinguishing mechanism;
the method is characterized in that: the contact arc extinguishing mechanism comprises a common power supply contact arc extinguishing mechanism and a standby power supply contact arc extinguishing mechanism which are identical in structure, and the common power supply contact arc extinguishing mechanism and the standby power supply contact arc extinguishing mechanism are combined in a pole box of the dual-power-supply automatic transfer switch;
the common power supply contact arc extinguishing mechanism and the standby power supply contact arc extinguishing mechanism respectively comprise an action rotating shaft, a connecting crank sleeved at the end of the action rotating shaft and an action connecting rod vertically hinged at the end of the connecting crank, a bridge type moving contact is arranged in a hollow part of the action connecting rod, a compression spring is arranged at the upper part of the bridge type moving contact, a pair of fixed contacts are correspondingly arranged at the lower part of the bridge type moving contact, and a left arc extinguishing chamber and a right arc extinguishing chamber which are independent are arranged between the bridge type moving contact and the fixed contacts.
2. The dual-power automatic transfer switch with the bridge-type moving contact as claimed in claim 1, wherein a conductive body is disposed in the middle of the bridge-type moving contact, two ends of the conductive body are provided with upturned arc guide angles, two ends of the lower portion of the conductive body are welded with contacts, and the upper portion of the conductive body is provided with a compression spring mounting plate.
3. The dual-power automatic transfer switch with the bridge-type moving contact as claimed in claim 1, wherein the pair of fixed contacts are bow-shaped and arranged in a back-to-back manner, the upper portion of each fixed contact is provided with a contact welding platform, and the lower portion of each fixed contact is connected to a moving contact connecting piece and a static contact connecting piece of the dual-power automatic transfer switch respectively.
4. The dual-power automatic transfer switch with the bridge type moving contact according to claim 3, wherein the moving contact connecting piece is arranged in a bow shape, the arc extinguish chamber is enclosed inside the moving contact connecting piece, the fixed contact is arranged at the lower end of the moving contact connecting piece, and a moving contact connecting terminal of dual power supplies is arranged at the upper end of the moving contact connecting piece.
5. The dual-power automatic transfer switch of the bridge type moving contact according to claim 3, wherein a fixed contact mounting surface is arranged at the lower end of the fixed contact connecting sheet, the pair of fixed contacts are oppositely and fixedly fastened on the fixed contact mounting surface, and a fixed contact connecting terminal of dual power supplies is arranged at the upper end of the fixed contact connecting sheet.
6. The dual-power automatic transfer switch with the bridge type moving contact according to claim 1, wherein the arc extinguishing plates of the arc extinguishing chambers are rectangular, the arc extinguishing plates are arranged in the arc extinguishing chambers in parallel, one ends of the arc extinguishing plates are provided with U-shaped arc inlets, and the bridge type moving contact is arranged in the U-shaped arc inlets of the left arc extinguishing chamber and the right arc extinguishing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919734.XU CN210015798U (en) | 2018-11-20 | 2018-11-20 | Bridge type moving contact dual-power automatic transfer switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919734.XU CN210015798U (en) | 2018-11-20 | 2018-11-20 | Bridge type moving contact dual-power automatic transfer switch |
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| Publication Number | Publication Date |
|---|---|
| CN210015798U true CN210015798U (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821919734.XU Active CN210015798U (en) | 2018-11-20 | 2018-11-20 | Bridge type moving contact dual-power automatic transfer switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326470A (en) * | 2018-11-20 | 2019-02-12 | 北京明日电器设备有限责任公司 | A kind of bridge-type moving contact double power supply automatic transfer switch |
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2018
- 2018-11-20 CN CN201821919734.XU patent/CN210015798U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326470A (en) * | 2018-11-20 | 2019-02-12 | 北京明日电器设备有限责任公司 | A kind of bridge-type moving contact double power supply automatic transfer switch |
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