CN212874298U - On-load tap-changer switching device - Google Patents
On-load tap-changer switching device Download PDFInfo
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- CN212874298U CN212874298U CN202021816857.8U CN202021816857U CN212874298U CN 212874298 U CN212874298 U CN 212874298U CN 202021816857 U CN202021816857 U CN 202021816857U CN 212874298 U CN212874298 U CN 212874298U
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Abstract
The utility model discloses an on-load tap-changer switching device, which comprises a tap-changer component and a switch switching component; the tapping switch assembly comprises a main switch contact, an auxiliary switch contact, a public switch contact, a first arc extinguishing vacuum tube and a second arc extinguishing vacuum tube, wherein the main switch contact, the public switch contact and the auxiliary switch contact are sequentially arranged; the switch switching assembly comprises a first driving plate, a first transmission mechanism, a second driving plate, a second transmission mechanism and a conduction plate, the first driving plate, the second driving plate and the conduction plate are sequentially and rigidly connected, the first driving plate is movably mounted near a first arc extinguishing vacuum tube, the second driving plate is movably mounted near a second arc extinguishing vacuum tube, and the conduction plate is movably mounted above a main switch contact, a public switch contact and an auxiliary switch contact. Adopt the utility model discloses, when realizing having the on-load tap-changer to switch, the efficiency and the security that have the on-load tap-changer to switch are effectively improved in the orderly cooperation of a plurality of vacuum tubes.
Description
Technical Field
The utility model relates to a circuit control technique especially relates to an on-load tap-changer auto-change over device.
Background
An on-load tap changer is a switching device which provides constant voltage for a transformer when the load changes. The switching device is characterized in that a vacuum tube is adopted as an arc extinguishing device in the switching process, the vacuum tube needs to continuously complete the reclosing, opening and closing coinciding process for ensuring the continuity and safety of power supply, the working principle is that a moving contact of the vacuum tube is pulled open through a switching mechanism to be separated from a fixed contact, and the vacuum arc is used for extinguishing arc, so that the current is divided.
The moving contact of vacuum tube is pulled open with electromagnet earlier to current switching mechanism, and then the electro-magnet resets, and the moving contact resets under self spring, to a plurality of vacuum tube cooperations, and the higher occasion of action time sequence requirement, when still remaining to cooperate with change over switch's switching simultaneously, current switching mechanism can not guarantee to the action time sequence basically to can lead to change over switch area arc and switch over, cause serious accident.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a provide an on-load tap-changer auto-change over device, when realizing on-load tap-changer switching, the orderly cooperation of a plurality of vacuum tubes effectively improves efficiency and the security that on-load switch switches over.
In order to solve the technical problem, the utility model provides an on-load tap-changer switching device, which comprises a tap-changer component and a switch switching component; the tapping switch assembly comprises a main switch contact, an auxiliary switch contact, a public switch contact, a first arc extinguishing vacuum tube and a second arc extinguishing vacuum tube, wherein the main switch contact, the public switch contact and the auxiliary switch contact are sequentially arranged, the first arc extinguishing vacuum tube is electrically connected with the main switch contact, and the second arc extinguishing vacuum tube is electrically connected with the public switch contact; the switch switching component comprises a first drive plate, a first transmission mechanism, a second drive plate, a second transmission mechanism and a conduction plate, the first drive plate, the second drive plate and the conduction plate are sequentially and rigidly connected, the first drive plate is movably arranged near the first arc-extinguishing vacuum tube and drives a moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch through the first transmission mechanism, the second drive plate is movably arranged near the second arc-extinguishing vacuum tube and drives a moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch through the second transmission mechanism, the conduction plate is movably arranged above the main switch contact, the public switch contact and the auxiliary switch contact and is communicated with the main switch contact and the public switch contact in the moving process, or the public switch contact and the auxiliary switch contact are communicated.
As an improvement of the above scheme, the first transmission mechanism comprises a first lever and a first pressure lever; one end of the first lever is connected with a moving contact connecting rod of the first arc extinguishing vacuum tube, the other end of the first lever is connected with the first pressure lever, a contact head is arranged at the top end of the first pressure lever, and the first driving plate is in contact with the contact head of the first pressure lever in the moving process so that the first pressure lever is pressed down to pry the first lever to drive the moving contact connecting rod of the first arc extinguishing vacuum tube to stretch.
As an improvement of the above scheme, the second transmission mechanism comprises a second lever and a second pressure lever; one end of the second lever is connected with a moving contact connecting rod of the second arc extinguishing vacuum tube, the other end of the second lever is connected with the second pressure lever, a contact head is arranged at the top end of the second pressure lever, and the second driving plate is in contact with the contact head of the second pressure lever in the moving process so that the second pressure lever is pressed down to pry the second lever to drive the moving contact connecting rod of the second arc extinguishing vacuum tube to stretch.
As an improvement of the scheme, the device further comprises a driving electromagnet, and the driving electromagnet is installed near the first driving plate, the second driving plate and the conduction plate so as to drive the first driving plate, the second driving plate and the conduction plate to move synchronously.
As an improvement of the scheme, the device further comprises a controller, and the driving electromagnet is electrically connected with the controller.
As an improvement of the scheme, the lower part of the first driving plate is provided with a protruding part, and the cross section of the lower part of the first driving plate is in an inverted eight-character shape.
As an improvement of the scheme, the lower part of the second driving plate is provided with a concave part, and the cross section of the lower part of the second driving plate is in a regular V shape.
As the improvement of the scheme, the device further comprises a movable guide rail, and the first driving plate, the second driving plate and the conduction plate are movably mounted on the movable guide rail.
As the improvement of the scheme, the first driving plate, the second driving plate and the conduction plate are respectively provided with a roller, and the first driving plate, the second driving plate and the conduction plate are movably arranged on the movable guide rail through the rollers.
Implement the utility model has the advantages that:
implement the utility model discloses on-load tap-changer switching device when realizing on-load tap-changer switching, the orderly cooperation of a plurality of vacuum tubes effectively improves efficiency and the security that on-load switch switches.
First, the main switch contact, the common switch contact, and the auxiliary switch contact are arranged in order. The main switch contact and the common switch contact constitute two contacts of the main switch, and the common switch contact and the auxiliary switch contact constitute two contacts of the auxiliary switch. The first arc extinguishing vacuum tube is electrically connected with the main switch contact, and the second arc extinguishing vacuum tube is electrically connected with the common switch contact, so that the first arc extinguishing vacuum tube and the second arc extinguishing vacuum tube are respectively responsible for arc extinguishing functions of the main switch and the auxiliary switch.
Secondly, a first driving plate, a second driving plate and a conducting plate in the switch switching assembly are sequentially and rigidly connected, so that the three parts move synchronously. The first driving plate is movably arranged near the first arc-extinguishing vacuum tube and drives the moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch through the first transmission mechanism, the second driving plate is movably arranged near the second arc-extinguishing vacuum tube and drives the moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch through the second transmission mechanism, and the conduction plate is movably arranged above the main switch contact, the public switch contact and the auxiliary switch contact and is communicated with the main switch contact and the public switch contact or is communicated with the public switch contact and the auxiliary switch contact in the moving process. Therefore, in the process of synchronous movement of the first driving plate, the second driving plate and the conducting plate, the actions of separation of the moving contact of the first arc extinguishing vacuum tube or the second arc extinguishing vacuum tube, switching between the main switch and the auxiliary switch and the like can be sequentially completed.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the on-load tap changer switching device of the present invention;
fig. 2 is a schematic structural diagram of a first transmission mechanism of the on-load tap-changer switching device of the present invention;
fig. 3 is a schematic structural diagram of a second transmission mechanism of the on-load tap-changer switching device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
Fig. 1 is a schematic diagram of the overall structure of the on-load tap changer switching device of the present invention.
The utility model discloses an on-load tap-changer switching device comprises a tap-changer component and a switch switching component; the tap switch assembly comprises a main switch contact 11, an auxiliary switch contact 12, a public switch contact 13, a first arc-extinguishing vacuum tube 14 and a second arc-extinguishing vacuum tube 15, wherein the main switch contact 11, the public switch contact 13 and the auxiliary switch contact 12 are sequentially arranged, the first arc-extinguishing vacuum tube 14 is electrically connected with the main switch contact 11, and the second arc-extinguishing vacuum tube 15 is electrically connected with the public switch contact 13; the switch switching component comprises a first driving plate 21, a first transmission mechanism 22, a second driving plate 23, a second transmission mechanism 24 and a conduction plate 25, the first driving plate 21, the second driving plate 23 and the conduction plate 25 are sequentially and rigidly connected, the first driving plate 21 is movably arranged near the first arc-extinguishing vacuum tube 14 and drives a moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch through the first transmission mechanism 22, the second driving plate 23 is movably arranged near the second arc-extinguishing vacuum tube 15 and drives a moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch through the second transmission mechanism 24, and the conduction plate 25 is movably arranged above the main switch contact 11, the public switch contact 13 and the auxiliary switch contact 12 and is connected with the main switch contact 11 and the public switch contact 13 in the moving process or is connected with the public switch contact 13 and the auxiliary switch contact 12.
Implement the utility model discloses on-load tap-changer switching device when realizing on-load tap-changer switching, the orderly cooperation of a plurality of vacuum tubes effectively improves efficiency and the security that on-load switch switches.
First, the main switch contact and the common switch contact constitute the two contacts of the main switch, and the common switch contact and the auxiliary switch contact constitute the two contacts of the auxiliary switch. In addition, the first arc extinguishing vacuum tube is electrically connected with the main switch contact, and the second arc extinguishing vacuum tube is electrically connected with the common switch contact, so that the first arc extinguishing vacuum tube and the second arc extinguishing vacuum tube are respectively responsible for arc extinguishing functions of the main switch and the auxiliary switch.
Secondly, a first driving plate, a second driving plate and a conducting plate in the switch switching assembly are sequentially and rigidly connected, so that the three parts move synchronously. The first driving plate is movably mounted near the first arc-extinguishing vacuum tube and drives a moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch through a first transmission mechanism, the second driving plate is movably mounted near the first arc-extinguishing vacuum tube and drives a moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch through a second transmission mechanism, and the conduction plate is movably mounted above the main switch contact, the public switch contact and the auxiliary switch contact and is communicated with the main switch contact and the public switch contact or is communicated with the public switch contact and the auxiliary switch contact in the moving process. Therefore, in the process of synchronous movement of the first driving plate, the second driving plate and the conducting plate, the actions of separation of the moving contact of the first arc extinguishing vacuum tube or the second arc extinguishing vacuum tube, switching between the main switch and the auxiliary switch and the like can be sequentially completed.
It should be noted that, when there are a plurality of on-load tap changers of the transformer, the on-load tap changers are grouped into two groups, each group is a tap changer component, and is matched with a switch switching component.
The operation of the on-load tap changer switching device of the present invention will be described below by taking the example of switching from the auxiliary switch to the main switch.
Firstly, in the initial state, the first arc extinguishing vacuum tube 14 is switched on, the second arc extinguishing vacuum tube 15 is switched off and disconnected, and the loop of the auxiliary switch is in the power-on state.
When the switching action starts, the second driving plate 23 drives the moving contact connecting rod of the second vacuum interrupter to contract through the second transmission mechanism 24, so that the second vacuum interrupter is switched on and powered on.
Then, the first driving plate 21 drives the movable contact link of the first arc vacuum tube 14 to stretch through the first transmission mechanism 22, so that the first arc vacuum tube is opened and powered off.
Subsequently, the conduction plate 25 moves to disconnect from the auxiliary switching circuit, and then the conduction plate continues to move to connect the main switching circuit.
Then, the first driving plate 21 drives the movable contact connecting rod of the first arc-extinguishing vacuum tube 14 to contract through the first transmission mechanism 22 so as to switch on the first arc-extinguishing vacuum tube 14 and electrify the first arc-extinguishing vacuum tube, and the second driving plate 23 drives the movable contact connecting rod of the second arc-extinguishing vacuum tube 15 to stretch through the second transmission mechanism 24 so as to switch off the second arc-extinguishing vacuum tube 15.
The final state after the switching state is that the first arc extinguishing vacuum tube 14 is switched on, the second arc extinguishing vacuum tube 15 is switched off and powered off, and the main switch loop is in a power-on state.
Conversely, the step of switching from the main switch circuit to the auxiliary switch circuit is performed in reverse.
The specific structure of the on-load tap-changer switching device of the present invention will be described below.
Fig. 2 is a schematic structural diagram of the first transmission mechanism 22, which includes a first lever 221 and a first pressing rod 222; one end of the first lever is connected with the moving contact connecting rod 141 of the first arc extinguishing vacuum tube, the other end of the first lever 221 is connected with the first pressure lever 222, the top end of the first pressure lever is provided with a contact 2221, and the first driving plate 23 is in contact with the contact 2221 of the first pressure lever in the moving process so that the first pressure lever 222 presses down to pry the first lever 221 to drive the moving contact connecting rod 141 of the first arc extinguishing vacuum tube to stretch and retract.
Fig. 3 is a schematic structural diagram of the second transmission mechanism 24, which includes a second lever 241 and a second pressing rod 242; one end of the second lever 241 is connected to the moving contact connecting rod 151 of the second arc-extinguishing vacuum tube, the other end of the second lever 241 is connected to the second pressure lever 242, a contact 2421 is disposed at the top end of the second pressure lever 242, and the second driving plate 23 contacts with the contact 2421 of the second pressure lever in the moving process so that the second pressure lever 242 presses down to pry the second lever 241 to drive the moving contact connecting rod 151 of the second arc-extinguishing vacuum tube to extend and retract.
From the above, the specific structure and transmission principle of the first transmission mechanism and the second transmission mechanism are the same. However, the first transmission mechanism is correspondingly driven by the first driving plate, the second transmission mechanism is correspondingly driven by the second driving plate, and the driving time sequences of the first transmission mechanism and the second transmission mechanism are different, so that the switching-on and switching-off time of the first arc-extinguishing vacuum tube and the switching-off time of the second arc-extinguishing vacuum tube are mutually matched, and arc extinguishing is timely and effectively carried out in the switching process of the on-load tap-changer.
The utility model discloses on-load tap-changer auto-change over device still includes the driving electromagnet, and the driving electromagnet is installed in near first drive plate, second drive plate and conduction board with drive first drive plate, second drive plate and conduction board synchronous motion.
The utility model discloses on-load tap-changer switching device still includes the controller, and driving electromagnet is connected with the controller electricity.
The controller is used for controlling the movement moments of the first driving plate, the second driving plate and the conducting plate through the driving electromagnet. It should be noted that the controller may be a single chip microcomputer. The single chip microcomputer integrates a series of functional circuits such as data processing, data storage, data input and output and the like, is small in size and convenient to install, and can be widely applied to the field of industrial production. Preferably, the controller can adopt a single chip microcomputer of the model STM32F407ZGT 6.
The lower part of the first driving plate is provided with a protruding part, and the cross section of the lower part of the first driving plate is in an inverted V shape.
The lower part of the second driving plate is provided with a concave part and the section of the lower part of the second driving plate is in a regular V shape.
The shape limitation of the first and second drive plates is to limit the number of times of contact with the contact of the pressing rod. For example, the inverted-splayed shape of the first driving plate only has a middle protruding part, so that the first driving plate is only contacted with the contact of the first pressure lever once in a single moving process, and the regular-splayed shape of the second driving plate has two protruding parts which are symmetrically distributed left and right, so that the second driving plate is contacted with the contact of the second pressure lever twice in a single moving process. Meanwhile, the shape limitation also influences the contact time sequence of the two driving plates and the corresponding pressure rod contact, and the like, so that the procedures of switching and arc extinguishing of the vacuum tube can be realized compactly in a short time.
The utility model discloses on-load tap-changer auto-change over device still includes movable guide, first drive plate, second drive plate and conduction board movable mounting on movable guide.
The first drive plate, the second drive plate and the conduction plate are respectively provided with a roller, and the first drive plate, the second drive plate and the conduction plate are movably arranged on the movable guide rail through the rollers.
Through the swing joint of gyro wheel and movable guide rail, first drive plate, second drive plate and conduction board realize synchronous movement through sliding on movable guide rail. Because the friction between the roller and the movable guide rail is small, the lowest driving power of driving devices such as driving electromagnets and the like is reduced, and the energy consumption is reduced.
Of course, the first driving plate, the second driving plate and the conduction plate can be directly movably mounted with the movable guide rail without a roller, and can also realize synchronous movement.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (9)
1. An on-load tap-changer switching device is characterized by comprising a tap-changer component and a switch switching component;
the tapping switch assembly comprises a main switch contact, an auxiliary switch contact, a public switch contact, a first arc-extinguishing vacuum tube and a second arc-extinguishing vacuum tube, wherein the main switch contact, the public switch contact and the auxiliary switch contact are sequentially arranged, the first arc-extinguishing vacuum tube is electrically connected with the main switch contact, and the second arc-extinguishing vacuum tube is electrically connected with the public switch contact;
the switch switching assembly comprises a first driving plate, a first transmission mechanism, a second driving plate, a second transmission mechanism and a conduction plate, wherein the first driving plate, the second driving plate and the conduction plate are sequentially and rigidly connected, the first driving plate is movably mounted near the first arc-extinguishing vacuum tube and drives a moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch through the first transmission mechanism, the second driving plate is movably mounted near the second arc-extinguishing vacuum tube and drives a moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch through the second transmission mechanism, and the conduction plate is movably mounted above the main switch contact, the public switch contact and the auxiliary switch contact and is communicated with the main switch contact and the public switch contact or the public switch contact and the auxiliary switch contact in the moving process.
2. The on-load tap changer switching device of claim 1, wherein the first transmission mechanism comprises a first lever and a first compression bar;
one end of the first lever is connected with a moving contact connecting rod of the first arc-extinguishing vacuum tube, the other end of the first lever is connected with the first pressure lever, a contact head is arranged at the top end of the first pressure lever, and the first driving plate is in contact with the contact head of the first pressure lever in the moving process so that the first pressure lever presses down to pry the first lever to drive the moving contact connecting rod of the first arc-extinguishing vacuum tube to stretch.
3. The on-load tap changer switching device of claim 1, wherein the second transmission mechanism comprises a second lever and a second pressure lever;
one end of the second lever is connected with a moving contact connecting rod of the second arc-extinguishing vacuum tube, the other end of the second lever is connected with the second pressure rod, a contact head is arranged at the top end of the second pressure rod, and the second driving plate is in contact with the contact head of the second pressure rod in the moving process so that the second pressure rod can be pressed down to pry the second lever to drive the moving contact connecting rod of the second arc-extinguishing vacuum tube to stretch.
4. The on-load tap changer switching device of claim 1, further comprising a driving electromagnet mounted adjacent to the first drive plate, second drive plate, and conduction plate for driving the first drive plate, second drive plate, and conduction plate to move in synchronization.
5. The on-load tap changer switching device of claim 4, further comprising a controller, wherein the driving electromagnet is electrically connected to the controller.
6. The on-load tap changer switching device of claim 1, wherein a lower portion of the first drive plate is provided with a protrusion and the cross-section of the lower portion of the first drive plate is in the shape of an inverted eight letter.
7. The on-load tap changer switching device of claim 1, wherein a lower portion of the second drive plate is recessed and has a generally right-eight shaped cross-section.
8. The on-load tap changer switching device of claim 1, further comprising a movable rail, wherein the first drive plate, the second drive plate, and the conduction plate are movably mounted on the movable rail.
9. The on-load tap changer switching device of claim 8, wherein each of the first drive plate, the second drive plate, and the conduction plate is provided with a roller, and the first drive plate, the second drive plate, and the conduction plate are movably mounted on the movable rail through the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021816857.8U CN212874298U (en) | 2020-08-26 | 2020-08-26 | On-load tap-changer switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021816857.8U CN212874298U (en) | 2020-08-26 | 2020-08-26 | On-load tap-changer switching device |
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| Publication Number | Publication Date |
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| CN212874298U true CN212874298U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021816857.8U Active CN212874298U (en) | 2020-08-26 | 2020-08-26 | On-load tap-changer switching device |
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| CN (1) | CN212874298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242510A (en) * | 2021-11-03 | 2022-03-25 | 广东电网电动汽车服务有限公司 | Horizontal on-load capacity-regulating tap switch |
-
2020
- 2020-08-26 CN CN202021816857.8U patent/CN212874298U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242510A (en) * | 2021-11-03 | 2022-03-25 | 广东电网电动汽车服务有限公司 | Horizontal on-load capacity-regulating tap switch |
| CN114242510B (en) * | 2021-11-03 | 2024-03-29 | 广东电网电动汽车服务有限公司 | Horizontal on-load capacity-regulating tapping switch |
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