A miniaturized capacity regulating switch and capacity regulating transformer

Abstract

The present invention discloses a miniaturized capacity-adjusting switch and a capacity-adjusting transformer, which are characterized by comprising a high-voltage capacity-adjusting driving mechanism, a high-voltage switching switch assembly, a high-voltage selection switch assembly, a low-voltage capacity-adjusting driving mechanism, a low-voltage selection switch assembly, a mounting base plate, and a metal mounting plate. The high-voltage switching switch assembly, the high-voltage selection switch assembly, and the low-voltage selection switch assembly all adopt a linear design, and use permanent magnets and electromagnetic mechanisms to drive the switch switching and selection, eliminating the spring energy storage mechanism with a complex mechanical structure, so that the switch structure is simple and the volume is small, the operational reliability is improved, the production cost is reduced, and the production cost of producing capacity-adjusting distribution transformers is reduced. The switch adopts a vacuum arc extinguishing chamber for switching during the capacity adjustment process, which avoids the influence of the performance of the transformer insulating oil due to the arcing caused by the contact switching, and reduces the maintenance cost brought to the user by oil filtering and oil changing.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a miniaturized capacity-adjusting switch and a capacity-adjusting transformer. Background Art

[0002] In recent years, the country has been advocating energy conservation and loss reduction, green environmental protection, so that enterprises have to pay attention to the problem of power waste. As far as the distribution network is concerned, the loss of distribution transformers is one of the main losses of the distribution network. With the continuous development of social economy and the continuous improvement of people's living standards, the power load is increasing, and its load changes periodically and seasonally. The capacity of the distribution transformer is selected according to the large capacity. When the load is small, it still operates at a large capacity. The loss is the loss of the large-capacity transformer. Its setting does not meet the development needs of the market for energy conservation and loss reduction. Therefore, it is necessary to add a distribution transformer capacity conversion device to convert it to a small-capacity operation mode when the load is small or no load. The traditional cylindrical capacity adjustment switch is large in size and installed on the side of the transformer. The size of the transformer needs to be increased. The installation is complicated, the cost is high, and the reliability is low. It has not been promoted and used. A miniaturized and highly reliable capacity adjustment switch is needed to fill the market gap. Summary of the invention

[0003] The present invention provides a miniaturized capacity-adjusting switch and a capacity-adjusting transformer, which adopt vacuum arc extinguishing to solve the maintenance problem. At the same time, the switch adopts electromagnetic drive and a linear structure setting, and has a simple structure and a small volume. When installed in a distribution transformer, the conventional shape and volume of the transformer are hardly changed. While improving reliability, the production cost of the user's capacity-adjusting transformer is reduced, and the switch is suitable for a large number of distribution transformers.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0005] A miniaturized capacity-adjusting switch, a three-phase capacity-adjusting switch for adjusting the capacity of a three-phase transformer, characterized in that it comprises a high-voltage capacity-adjusting drive mechanism, a high-voltage switching switch assembly, a high-voltage selection switch assembly, a low-voltage capacity-adjusting drive mechanism, a low-voltage selection switch assembly, a mounting base plate, and a metal mounting plate;

[0006] The high-voltage switching switch assembly and the high-voltage selection switch assembly are mounted on the metal mounting plate; the low-voltage capacity adjustment drive mechanism and the low-voltage selection switch assembly are mounted on the mounting base plate;

[0007] The high-voltage capacity adjustment drive mechanism is located on the upper side of the low-voltage capacity adjustment drive mechanism, and the high-voltage switching switch assembly and the high-voltage selection switch assembly are located on the upper side of the low-voltage selection switch assembly;

[0008] The high-voltage capacity adjustment driving mechanism includes a high-voltage electromagnetic mechanism;

[0009] The high-voltage switching switch assembly includes a high-voltage vacuum interrupter and a high-voltage disconnect bracket assembly;

[0010] The high-voltage selector switch assembly includes a high-voltage moving contact assembly and a high-voltage static contact assembly;

[0011] The low-voltage capacity-adjusting driving mechanism includes a low-voltage permanent magnet mechanism and a low-voltage linkage mechanism;

[0012] The low-voltage selector switch assembly includes a low-voltage moving contact assembly and a low-voltage stationary contact assembly;

[0013] The low-voltage linkage mechanism is connected to the high-voltage moving contact assembly via a linkage rod;

[0014] The high-voltage electromagnetic mechanism drives the high-voltage disconnect bracket assembly to move, and the high-voltage disconnect bracket assembly drives the high-voltage vacuum interrupter to move, completing the circuit switching, the low-voltage permanent magnet mechanism drives the low-voltage linkage mechanism to move, and the low-voltage linkage mechanism drives the low-voltage moving contact assembly to move, and selects the corresponding low-voltage static contact in the low-voltage static contact assembly for electrical connection, and the low-voltage linkage mechanism drives the high-voltage moving contact assembly to move through the linkage rod, and selects the corresponding high-voltage static contact in the high-voltage static contact assembly for electrical connection, completing the conversion of large and small capacities.

[0015] According to a preferred embodiment of the present invention, the high-voltage capacity regulating driving mechanism and the low-voltage capacity regulating driving mechanism sequentially drive the high-voltage switching switch assembly, the high-voltage selection switch assembly, and the low-voltage selection switch assembly to operate to complete the conversion of large and small capacities.

[0016] According to a preferred embodiment of the present invention, the low-voltage linkage mechanism is divided into an upper linkage bracket and a lower linkage bracket, the low-voltage moving contact assembly is installed on the upper linkage bracket and the lower linkage bracket, the low-voltage static contact assembly includes a low-voltage static contact and a static contact integrated seat, the low-voltage static contact is installed on the mounting base plate through the static contact integrated seat, the upper linkage bracket and the lower linkage bracket are respectively located on the upper and lower sides of the low-voltage static contact, the driving rod of the low-voltage permanent magnet mechanism is connected to the upper linkage bracket and the lower linkage bracket, driving them to move and then drive the low-voltage moving contact assembly to move, and the moving contact in the low-voltage moving contact assembly selects the corresponding low-voltage static contact for electrical connection.

[0017] According to a preferred embodiment of the present invention, the high-voltage moving contact assembly includes a high-voltage moving contact and a high-voltage moving contact bracket, and the high-voltage moving contact bracket is connected to the low-voltage linkage mechanism through the linkage rod; the high-voltage static contact assembly includes a high-voltage static contact and a high-voltage static contact bracket, and the high-voltage static contact is installed on the high-voltage static contact bracket, and the low-voltage linkage mechanism drives the high-voltage moving contact bracket to move, and the high-voltage moving contact bracket drives the high-voltage moving contact to select the corresponding high-voltage static contact for electrical connection.

[0018] According to a preferred embodiment of the present invention, the high-voltage disconnecting bracket assembly includes a high-voltage disconnecting movable bracket, a high-voltage disconnecting static support, a disconnecting block, and a connecting block. The moving contact of the high-voltage vacuum arc extinguishing chamber is connected to the high-voltage disconnecting movable bracket through the disconnecting block, and the static contact of the high-voltage vacuum arc extinguishing chamber is connected to the high-voltage disconnecting static support through the connecting block. The high-voltage disconnecting static support is installed and fixed on the metal mounting plate, and the metal mounting plate is fixedly connected to the mounting base plate through mounting studs. The high-voltage electromagnetic mechanism drives the high-voltage disconnecting movable bracket to move, and the high-voltage disconnecting movable bracket drives the moving contact of the high-voltage vacuum arc extinguishing chamber to move, thereby completing the conduction and disconnection of the high-voltage vacuum arc extinguishing chamber.

[0019] According to a preferred embodiment of the present invention, the three-phase high-voltage switching switch assembly, the high-voltage selection switch assembly, and the low-voltage selection switch assembly are all arranged in a straight line on the metal mounting plate and the mounting base plate.

[0020] A capacity-adjusting transformer, characterized in that it is a capacity-adjusting transformer using any of the miniaturized capacity-adjusting switches described above.

[0021] Compared with the prior art, the beneficial effect of the present invention is that it adopts electromagnetic mechanism to drive, select and switch to realize large and small capacity conversion. It has a simple structure and small size (installed in the distribution transformer, it hardly changes the volume and shape of the conventional distribution transformer), improves operation reliability, and reduces the production cost of the user's capacity-adjusting transformer. At the same time, it adopts vacuum arc extinguishing chamber for switching during the capacity adjustment process, which avoids the influence of arcing on the performance of the transformer insulating oil due to contact switching, and reduces the maintenance cost brought to the user by oil filtering and oil changing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram A of a miniaturized capacitance-adjusting switch of the present invention;

[0023] Figure 2 It is a structural schematic diagram B of a miniaturized capacitance-adjusting switch of the present invention;

[0024] Figure 3 It is a structural schematic diagram C of a miniaturized capacitance regulating switch of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings. The embodiments described below are only used to more clearly illustrate the technical solution of the present invention. They are selected embodiments of the present invention, not all embodiments, and cannot be used to limit the scope of protection of the present invention. All other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 3 The present invention discloses a miniaturized capacity-adjusting switch, comprising a high-voltage capacity-adjusting driving mechanism 1, a high-voltage switching switch assembly 2, a high-voltage selection switch assembly 3, a low-voltage capacity-adjusting driving mechanism 4, a low-voltage selection switch assembly 5, a mounting base plate 6, and a metal mounting plate 7. The high-voltage capacity-adjusting driving mechanism 1 mainly comprises a high-voltage electromagnetic mechanism 1.1, the high-voltage switching switch assembly 2 comprises a high-voltage vacuum interrupter 2.1, and a high-voltage disconnecting bracket assembly 2.2, the high-voltage selection switch assembly 3 comprises a high-voltage moving contact assembly 3.1, and a high-voltage static contact assembly 3.2, the low-voltage capacity-adjusting driving mechanism 4 comprises a low-voltage permanent magnet mechanism 4.1, and a low-voltage linkage mechanism 4.2, and the low-voltage selection switch assembly 5 comprises a low-voltage moving contact assembly 5.1, and a low-voltage static contact assembly 5.2.

[0027] The low-voltage linkage mechanism 4.2 is divided into an upper linkage bracket 4.2.1 and a lower linkage bracket 4.2.2. The low-voltage moving contact assembly 5.1 is installed on the upper linkage bracket 4.2.1 and the lower linkage bracket 4.2.2. The low-voltage static contact assembly 5.2 includes a low-voltage static contact 5.2.1 and a static contact integrated seat 5.2.2. The low-voltage static contact 5.2.1 is installed on the mounting base 6 through the static contact integrated seat 5.2.2. The upper linkage bracket 4.2.1 and the lower linkage bracket 4.2.2 are respectively located on the upper and lower sides of the low-voltage static contact 5.2.1. The driving rod of the low-voltage permanent magnet mechanism 4.1 is connected to the upper linkage bracket 4.2.1 and the lower linkage bracket 4.2.2.

[0028] The high-voltage moving contact assembly 3.1 includes a high-voltage moving contact 3.1.1 and a high-voltage moving contact bracket 3.1.2. The high-voltage moving contact bracket 3.1.2 is connected to the low-voltage linkage mechanism 4.2 through the linkage rod 3.1.2.1 thereon. The high-voltage static contact assembly includes a high-voltage static contact 3.2.1 and a high-voltage static contact bracket 3.2.2. The high-voltage static contact 3.2.1 is installed on the high-voltage static contact bracket 3.2.2.

[0029] The high-voltage disconnect bracket assembly 2.2 includes a high-voltage disconnect moving bracket 2.2.1, a high-voltage disconnect static support 2.2.2, a disconnect block 2.2.3, and a connecting block 2.2.4. The moving contact of the high-voltage vacuum interrupter 2.1 is connected to the high-voltage disconnect moving bracket 2.2.1 through the disconnect block 2.2.3, and the static contact of the high-voltage vacuum interrupter 2.1 is connected to the high-voltage disconnect static support 2.2.2 through the connecting block 2.2.4. The high-voltage disconnect static support 2.2.2 is installed and fixed on a metal mounting plate 7, and the metal mounting plate 7 is fixedly connected to the mounting base plate 6 through several fixing studs.

[0030] The high-voltage electromagnetic mechanism 1.1 drives the high-voltage breaking moving bracket 2.2.1 to move, and the high-voltage breaking moving bracket 2.2.1 drives the moving contact of the high-voltage vacuum interrupter 2.1 to move, completing the conduction and disconnection of the high-voltage vacuum interrupter 2.1. The low-voltage permanent magnet mechanism 4.1 drives the low-voltage linkage mechanism 4.2 to move through the driving rod, and the low-voltage linkage mechanism 4.2 drives the low-voltage moving contact assembly 5.1 thereon to move, and the moving contact in the low-voltage moving contact assembly 5.1 selects the corresponding low-voltage static contact 5.2.1 for electrical connection, and at the same time, the low-voltage linkage mechanism 4.2 drives the high-voltage moving contact bracket 3.1.2 to move through the linkage rod 3.1.2.1 on the high-voltage moving contact bracket 3.1.2, and the high-voltage moving contact bracket 3.1.2 drives the high-voltage moving contact 3.1.1 to select the corresponding high-voltage static contact 3.2.1 for electrical connection, completing the conversion of large and small capacities.

[0031] The principle of the miniaturized capacitance-adjusting switch of the present invention is to adopt the conventional capacitance-adjusting principle of star-angle conversion "Y-△" in the technical field, which will not be described in detail here.

[0032] In summary, the miniaturized capacity-adjusting switch of the present invention adopts a linear design scheme as a whole, and the driving mechanism drives the movement of the selection switch component and the switching switch component in a linear manner, which greatly simplifies the mechanical mechanism of the switch and improves the reliability of the switch; at the same time, all components of the switch are installed on one side of the same base plate, and the spatial position of each component is reasonably compact through linear arrangement and combination, which greatly reduces the size of the switch, reduces the production cost of the switch and the production cost of the user's capacity-adjusting transformer. At the same time, the switch uses a vacuum interrupter to switch the gear, which avoids the influence of the performance of the transformer insulating oil on the arc caused by contact switching, reduces the maintenance cost brought to the user by oil filtering and oil changing, and realizes maintenance-free during the life cycle of the switch, which is suitable for a large number of distribution transformers.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for technicians in this technical field, several changes and improvements can be made without departing from the technical mechanical action principle and structure of the present invention. These changes and improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A miniaturized capacity-adjusting switch, used for three-phase capacity-adjusting switch for three-phase transformer capacity adjustment, characterized in that: It includes a high-voltage capacity adjustment drive mechanism, a high-voltage switching switch assembly, a high-voltage selection switch assembly, a low-voltage capacity adjustment drive mechanism, a low-voltage selection switch assembly, a mounting base plate, and a metal mounting plate; The high-voltage switching switch assembly and the high-voltage selection switch assembly are mounted on the metal mounting plate; the low-voltage capacity adjustment drive mechanism and the low-voltage selection switch assembly are mounted on the mounting base plate; The high-voltage capacity adjustment drive mechanism is located on the upper side of the low-voltage capacity adjustment drive mechanism, and the high-voltage switching switch assembly and the high-voltage selection switch assembly are located on the upper side of the low-voltage selection switch assembly; The high-voltage capacity adjustment driving mechanism includes a high-voltage electromagnetic mechanism; The high-voltage switching switch assembly includes a high-voltage vacuum interrupter and a high-voltage disconnect bracket assembly; The high-voltage selector switch assembly includes a high-voltage moving contact assembly and a high-voltage static contact assembly; The low-voltage capacity-adjusting driving mechanism includes a low-voltage permanent magnet mechanism and a low-voltage linkage mechanism; The low-voltage selector switch assembly includes a low-voltage moving contact assembly and a low-voltage stationary contact assembly; The low-voltage linkage mechanism is connected to the high-voltage moving contact assembly via a linkage rod; The high-voltage electromagnetic mechanism drives the high-voltage disconnect bracket assembly to move, and the high-voltage disconnect bracket assembly drives the high-voltage vacuum interrupter to move, completing the circuit switching, the low-voltage permanent magnet mechanism drives the low-voltage linkage mechanism to move, and the low-voltage linkage mechanism drives the low-voltage moving contact assembly to move, and selects the corresponding low-voltage static contact in the low-voltage static contact assembly for electrical connection, and the low-voltage linkage mechanism drives the high-voltage moving contact assembly to move through the linkage rod, and selects the corresponding high-voltage static contact in the high-voltage static contact assembly for electrical connection, completing the conversion of large and small capacities.

2. A miniaturized capacitance-adjusting switch according to claim 1, characterized in that: The high-voltage capacity-adjusting driving mechanism and the low-voltage capacity-adjusting driving mechanism sequentially drive the high-voltage switching switch assembly, the high-voltage selection switch assembly, and the low-voltage selection switch assembly to operate to complete the conversion of large and small capacities.

3. A miniaturized capacitance-adjusting switch according to claim 1, characterized in that: The low-voltage linkage mechanism is divided into an upper linkage bracket and a lower linkage bracket, the low-voltage moving contact assembly is installed on the upper linkage bracket and the lower linkage bracket, the low-voltage static contact assembly includes a low-voltage static contact and a static contact integrated seat, the low-voltage static contact is installed on the mounting base plate through the static contact integrated seat, the upper linkage bracket and the lower linkage bracket are respectively located on the upper and lower sides of the low-voltage static contact, the driving rod of the low-voltage permanent magnet mechanism is connected to the upper linkage bracket and the lower linkage bracket, driving them to move and then drive the low-voltage moving contact assembly to move, and the moving contact in the low-voltage moving contact assembly selects the corresponding low-voltage static contact for electrical connection.

4. A miniaturized capacitance-adjusting switch according to claim 1, characterized in that: The high-voltage moving contact assembly includes a high-voltage moving contact and a high-voltage moving contact bracket, and the high-voltage moving contact bracket is connected to the low-voltage linkage mechanism through the linkage rod; the high-voltage static contact assembly includes a high-voltage static contact and a high-voltage static contact bracket, and the high-voltage static contact is installed on the high-voltage static contact bracket, and the low-voltage linkage mechanism drives the high-voltage moving contact bracket to move, and the high-voltage moving contact bracket drives the high-voltage moving contact to select the corresponding high-voltage static contact for electrical connection.

5. The miniaturized capacitance-adjusting switch according to claim 1, characterized in that: The high-voltage disconnecting bracket assembly includes a high-voltage disconnecting movable bracket, a high-voltage disconnecting static support, a disconnecting block, and a connecting block. The moving contact of the high-voltage vacuum interrupter is connected to the high-voltage disconnecting movable bracket through the disconnecting block, and the static contact of the high-voltage vacuum interrupter is connected to the high-voltage disconnecting static support through the connecting block. The high-voltage disconnecting static support is installed and fixed on the metal mounting plate, and the metal mounting plate is fixedly connected to the mounting base plate through mounting studs. The high-voltage electromagnetic mechanism drives the high-voltage disconnecting movable bracket to move, and the high-voltage disconnecting movable bracket drives the moving contact of the high-voltage vacuum interrupter to move, thereby completing the conduction and disconnection of the high-voltage vacuum interrupter.

6. A miniaturized capacitance-adjusting switch according to claim 1, characterized in that: The three-phase high-voltage switching switch assembly, the high-voltage selection switch assembly, and the low-voltage selection switch assembly are all arranged in a straight line on the metal mounting plate and the mounting base plate.

7. A capacity regulating transformer, characterized in that: A capacity-adjusting transformer using the miniaturized capacity-adjusting switch according to any one of the preceding claims.

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