On-load tap changer and transformer

Abstract

The present application relates to the technical field of transformer voltage regulating switches, and in particular to an on-load voltage regulating switch and a transformer. The on-load voltage regulating switch includes a housing, a vacuum switch assembly and a voltage regulating switch assembly arranged in the housing, wherein the vacuum switch assembly and the voltage regulating switch assembly are arranged side by side in the first direction of the housing; the vacuum switch assembly includes a plurality of vacuum switch groups distributed in the second direction of the housing, and the voltage regulating switch assembly includes a plurality of voltage regulating switch groups distributed in the second direction of the housing; the first direction and the second direction are arranged vertically; the vacuum switch group and the voltage regulating switch group are electrically connected one-to-one. The present application avoids the phenomenon of cross-wiring between the vacuum switch group and the voltage regulating switch group by arranging the vacuum switch group of each phase to be connected in a one-to-one position correspondence with the voltage regulating switch group of the corresponding phase, making the wiring more reasonable and improving the insulation strength of the switch.

Description

Technical Field

[0001] The present application relates to the technical field of transformer voltage regulating switches, and in particular to an on-load voltage regulating switch and a transformer. Background Art

[0002] The existing on-load voltage regulating switches include a three-phase voltage regulating main circuit and a three-phase voltage regulating transition circuit. Each phase of the voltage regulating main circuit and the voltage regulating transition circuit are provided with a voltage regulating switch and a vacuum switch. The voltage regulating switches of each phase are distributed along the length direction of the switch. The vacuum switches of each phase are designed at one end of the length direction of the switch. The connecting lines between the vacuum switches of each phase and the voltage regulating switches of each phase are difficult to arrange, and the connecting lines are prone to crossover, resulting in low insulation strength of the switch. Summary of the invention

[0003] The purpose of the present application is to provide an on-load voltage regulating switch and a transformer, which are used to reasonably arrange the connecting lines between the vacuum switches of each phase and the voltage regulating switches of each phase.

[0004] The present application provides an on-load voltage regulating switch, comprising a housing, a vacuum switch assembly and a voltage regulating switch assembly arranged in the housing, wherein the vacuum switch assembly and the voltage regulating switch assembly are arranged side by side in a first direction of the housing;

[0005] The vacuum switch assembly includes a plurality of vacuum switch groups distributed in the second direction of the housing, and the voltage regulating switch assembly includes a plurality of voltage regulating switch groups distributed in the second direction of the housing;

[0006] The first direction and the second direction are arranged perpendicularly;

[0007] The vacuum switch group and the voltage regulating switch group are electrically connected in a one-to-one correspondence.

[0008] In the above technical solution, further, the voltage regulating switch group includes a plurality of voltage regulating switches electrically connected;

[0009] The voltage regulating switch comprises a moving contact and a plurality of stationary contacts, wherein the plurality of stationary contacts comprises a first stationary contact and a second stationary contact which are arranged at intervals, wherein the moving contact can move between the first stationary contact and the second stationary contact, wherein the moving contact and the first stationary contact are normally open contacts, and wherein the moving contact and the second stationary contact are normally closed contacts;

[0010] A moving contact of one of the voltage regulating switches in the voltage regulating switch group is connected to the vacuum switch group.

[0011] In the above technical solution, further, the voltage regulating switch directly connected to the vacuum switch group is a first voltage regulating switch, and a moving contact of the first voltage regulating switch is electrically connected to the vacuum switch group through a soft connector.

[0012] In the above technical solution, further, the moving contact of any voltage regulating switch in the voltage regulating switch group except the first voltage regulating switch is electrically connected to the static contact of the correspondingly connected voltage regulating switch through a soft connecting piece.

[0013] In the above technical solution, further, the static contact is provided with a static end conductive terminal, and the dynamic contact is provided with a dynamic end conductive terminal, and the dynamic end conductive terminal can abut against the static end conductive terminal.

[0014] In the above technical solution, further, the moving contact comprises an insulating member and a supporting assembly, and the supporting assembly supports and connects the moving end conductive terminal;

[0015] The support assembly includes a first limiting member, a second limiting member and a connecting plug-in; the second limiting member is fixedly connected to the insulating member;

[0016] The first limiting member is provided with a first limiting groove opening toward the insulating member and cooperating with the movable conductive terminal; the second limiting member is provided with a second limiting groove opening away from the insulating member and cooperating with the movable conductive terminal;

[0017] The connecting plug-in is plugged into the first limiting member and the second limiting member respectively, so that the movable end conductive terminal is clamped in the first limiting groove and the second limiting groove in sequence.

[0018] In the above technical solution, further, the movable end conductive terminal includes a first conductive contact, an elastic member and a second conductive contact connected in sequence;

[0019] The moving contact moves between the first stationary contact and the second stationary contact, so that the first conductive contact abuts against the stationary conductive terminal of the first stationary contact and can compress the elastic member, or the second conductive contact abuts against the stationary conductive terminal of the second stationary contact and can compress the elastic member.

[0020] In the above technical solution, further, it also includes a first operating mechanism and a plurality of second operating mechanisms;

[0021] The first operating mechanism is connected to a plurality of vacuum switch groups, and is used to drive corresponding vacuum switches in the plurality of vacuum switch groups to disconnect or connect simultaneously;

[0022] The plurality of operating mechanisms are connected to corresponding voltage regulating switches in the plurality of voltage regulating switch groups, and are used to drive the corresponding voltage regulating switches in the plurality of voltage regulating switch groups to be disconnected or connected simultaneously.

[0023] In the above technical solution, further, the first operating mechanism includes a first permanent magnet mechanism and a first transmission member connected to each other, the first permanent magnet mechanism is a monostable permanent magnet mechanism, and the first transmission member is connected to the plurality of vacuum switch groups;

[0024] The second operating mechanism includes a second permanent magnet mechanism and a second transmission member connected to each other, the second permanent magnet mechanism is a bistable permanent magnet mechanism, and the second transmission member is connected to the corresponding voltage regulating switch in the plurality of voltage regulating switch groups.

[0025] The present application also provides a transformer, comprising the on-load tap-changing switch described in the above solution.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] The on-load voltage-regulating switch provided in the present application comprises a shell, a vacuum switch assembly and a voltage-regulating switch assembly arranged in the shell, the vacuum switch assembly and the voltage-regulating switch assembly are arranged side by side in a first direction of the shell; the vacuum switch assembly comprises a plurality of vacuum switch groups distributed in a second direction of the shell, and the voltage-regulating switch assembly comprises a plurality of voltage-regulating switch groups distributed in the second direction of the shell; the first direction and the second direction are arranged vertically; the vacuum switch groups and the voltage-regulating switch groups are electrically connected in a one-to-one correspondence.

[0028] Specifically, the on-load voltage-regulating switch includes a shell, a vacuum switch assembly and a voltage-regulating switch assembly, which is used to perform on-load voltage regulation on a three-phase transformer. The on-load voltage-regulating switch includes a three-phase voltage-regulating main circuit and a three-phase voltage-regulating transition circuit. The voltage-regulating main circuit of each phase and the voltage-regulating transition circuit of each phase are connected in parallel, and each phase of the three-phase transformer is respectively connected to the voltage-regulating main circuit and the voltage-regulating transition circuit of each phase, wherein a main circuit switch is provided on the voltage-regulating main circuit, and a transition circuit switch is provided on the voltage-regulating transition circuit. The main circuit switch and the transition circuit switch are vacuum switches; a voltage-regulating switch is also provided on the voltage-regulating main circuit.

[0029] The vacuum switch assembly and the voltage regulating switch assembly are arranged side by side in the first direction of the shell, and multiple vacuum switch groups correspond to each phase circuit respectively and are distributed along the second direction of the shell. Multiple voltage regulating switch groups correspond to each phase circuit respectively and are distributed along the second direction of the shell. The first direction and the second direction are arranged vertically, so that the vacuum switch group of each phase can be connected to the voltage regulating switch group of the corresponding phase in a one-to-one position correspondence.

[0030] The on-load voltage-regulating switch provided in the present application avoids the phenomenon of cross wiring between the vacuum switch group and the voltage-regulating switch group by setting the vacuum switch group of each phase and connecting them one by one with the voltage-regulating switch group of the corresponding phase. The wiring is more reasonable and the insulation strength of the switch is improved.

[0031] The present application also provides a transformer, including the on-load tap-changing switch described in the above scheme, which also has the above beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of an on-load voltage regulating switch provided in Embodiment 1 of the present application;

[0034] Figure 2 A schematic structural diagram of a moving contact provided in Embodiment 1 of the present application at a first viewing angle;

[0035] Figure 3 A schematic structural diagram of the moving contact provided in the first embodiment of the present application at a second viewing angle;

[0036] Figure 4 This is a schematic diagram of the structure of the on-load voltage regulating switch provided in Example 2 of the present application.

[0037] In the figure: 101-housing; 102-vacuum switch assembly; 103-voltage regulating switch assembly; 104-vacuum switch group; 105-voltage regulating switch group; 106-voltage regulating switch; 107-moving contact; 108-first static contact; 109-second static contact; 110-first voltage regulating switch; 111-soft connector; 112-static conductive terminal; 113-moving conductive terminal; 114-insulating member; 115-support assembly; 116-first limiting member; 117-second limiting member; 118-connecting plug-in; 119-first limiting groove; 120-second limiting groove; 121-first conductive contact; 122-elastic member; 123-second conductive contact; 124-first operating mechanism; 125-second operating mechanism; 126-terminal block. DETAILED DESCRIPTION

[0038] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Embodiment 1

[0042] See also Figures 1 to 3 As shown, the on-load voltage-regulating switch provided by the present application includes a shell 101, a vacuum switch assembly 102 and a voltage-regulating switch assembly 103 arranged in the shell 101, the vacuum switch assembly 102 and the voltage-regulating switch assembly 103 are arranged side by side in a first direction of the shell 101; the vacuum switch assembly 102 includes a plurality of vacuum switch groups 104 distributed in a second direction of the shell 101, and the voltage-regulating switch assembly 103 includes a plurality of voltage-regulating switch groups 105 distributed in the second direction of the shell 101; the first direction and the second direction are arranged vertically; the vacuum switch group 104 and the voltage-regulating switch group 105 are electrically connected in a one-to-one correspondence.

[0043] Specifically, the on-load voltage regulating switch includes a shell 101, a vacuum switch assembly 102 and a voltage regulating switch assembly 103, which is used to perform on-load voltage regulation on a three-phase transformer. The on-load voltage regulating switch includes a three-phase voltage regulating main circuit and a three-phase voltage regulating transition circuit. The voltage regulating main circuit of each phase and the voltage regulating transition circuit of each phase are connected in parallel. Each phase of the three-phase transformer is respectively connected to the voltage regulating main circuit and the voltage regulating transition circuit of each phase. A main circuit switch is provided on the voltage regulating main circuit, and a transition circuit switch is provided on the voltage regulating transition circuit. The main circuit switch and the transition circuit switch are vacuum switches. A voltage regulating switch 106 is also provided on the voltage regulating main circuit.

[0044] The vacuum switch assembly 102 and the voltage regulating switch assembly 103 are arranged side by side in the first direction A of the housing 101, and the plurality of vacuum switch groups 104 correspond to the circuits of each phase respectively and are distributed along the second direction of the housing 101. The plurality of voltage regulating switch groups 105 correspond to the circuits of each phase respectively and are distributed along the second direction of the housing 101. The first direction and the second direction are arranged perpendicularly, so that the vacuum switch group 104 of each phase can be connected to the voltage regulating switch group 105 of the corresponding phase in a one-to-one positional correspondence. Specifically, the first direction can be the width direction of the housing 101, see Figure 1 As shown, the first direction is the A direction in the figure; the second direction may be the length direction of the housing 101, see Figure 1 As shown, the second direction is direction B in the figure.

[0045] The on-load voltage-regulating switch provided in the present application avoids the phenomenon of cross wiring between the vacuum switch group 104 and the voltage-regulating switch group 105 by setting the vacuum switch group 104 of each phase to be connected in a one-to-one position correspondence with the voltage-regulating switch group 105 of the corresponding phase, making the wiring more reasonable and improving the insulation strength of the switch.

[0046] In an optional scheme of this embodiment, the voltage regulating switch group 105 includes a plurality of electrically connected voltage regulating switches 106; the voltage regulating switch 106 includes a moving contact 107 and a plurality of stationary contacts, the plurality of stationary contacts include a first stationary contact 108 and a second stationary contact 109 arranged at intervals, the moving contact 107 can move between the first stationary contact 108 and the second stationary contact 109, the moving contact 107 and the first stationary contact 108 are normally open contacts, and the moving contact 107 and the second stationary contact 109 are normally closed contacts; the moving contact 107 of a voltage regulating switch 106 in the voltage regulating switch group 105 is connected to the vacuum switch group 104.

[0047] In this embodiment, the voltage regulating switch group 105 includes a plurality of electrically connected voltage regulating switches 106, which are respectively connected to the taps of the coil. The moving contact 107 can move between the first stationary contact 108 and the second stationary contact 109 to abut against the first stationary contact 108 or the second stationary contact 109, that is, connected to different coil taps, thereby achieving switching between different numbers of coil turns.

[0048] Since the on-load voltage-regulating switch needs to regulate the voltage under load, when the circuit of the voltage-regulating switch 106 switches the number of turns, a vacuum switch needs to be connected in the voltage-regulating circuit to realize the arc extinguishing function. Therefore, a moving contact 107 of a voltage-regulating switch 106 in the voltage-regulating switch group 105 is connected to the vacuum switch group 104.

[0049] In the optional solution of this embodiment, the voltage regulating switch 106 directly connected to the vacuum switch group 104 is the first voltage regulating switch 110, and the moving contact 107 of the first voltage regulating switch 110 is electrically connected to the vacuum switch group 104 through the soft connection piece 111. In addition, it should be noted that the meaning of the first voltage regulating switch 110 being directly connected to the vacuum switch group 104 here can be understood as: the first voltage regulating switch 110 is directly connected to the vacuum switch group 104, and is not connected to the vacuum switch group 104 via other voltage regulating switches, but can be electrically connected to the vacuum switch group 104 through the soft connection piece 111.

[0050] In this embodiment, since the moving contact 107 needs to move between the stationary contacts and the vacuum switch group 104 is stationary, the moving contact 107 is electrically connected to the vacuum switch group 104 through the soft connector 111. The use of the soft connector 111 can effectively reduce the contact points and reduce the direct resistance. Specifically, the soft connector 111 can be welded to the contact point to reduce the number of fastening points and improve production efficiency.

[0051] In an optional solution of this embodiment, the moving contact 107 of any voltage regulating switch 106 in the voltage regulating switch group 105 except the first voltage regulating switch 110 is electrically connected to the static contact of the corresponding connected voltage regulating switch 106 through a soft connector 111 .

[0052] In this embodiment, the moving contact 107 needs to move between the stationary contacts, and the stationary contacts are stationary, so the moving contact 107 is electrically connected to the stationary contact through a soft connector 111. The use of the soft connector 111 can effectively reduce the contact points and reduce the direct resistance. Specifically, the soft connector 111 can be welded to the contact point, thereby reducing the number of fastening points and improving production efficiency.

[0053] In an optional solution of this embodiment, a static end conductive terminal 112 is provided on the static contact, and a dynamic end conductive terminal 113 is provided on the dynamic contact 107 . The dynamic end conductive terminal 113 can abut against the static end conductive terminal 112 .

[0054] In this embodiment, a static end conductive terminal 112 is provided on the static contact, and a dynamic end conductive terminal 113 is provided on the moving contact 107. The static contact and the moving contact 107 are connected by a single point contact, that is, a single contact structure is adopted, which can significantly reduce the spacing between the voltage regulating switches 106. When the voltage regulating gear is increased, the overall size of the switch changes little, and the overall structure of the switch is more compact. The on-load voltage regulating switch uses a single contact contact structure, which effectively reduces the volume of the switch and reduces the cost of the switch.

[0055] In an optional scheme of this embodiment, the moving contact 107 includes an insulating member 114 and a supporting assembly 115, and the supporting assembly 115 supports and connects the moving end conductive terminal 113; the supporting assembly 115 includes a first limiting member 116, a second limiting member 117 and a connecting plug-in 118; the second limiting member 117 is fixedly connected to the insulating member 114; the first limiting member 116 is provided with a first limiting groove 119 with an opening toward the insulating member 114 and cooperating with the moving end conductive terminal 113; the second limiting member 117 is provided with a second limiting groove 120 with an opening facing away from the insulating member 114 and cooperating with the moving end conductive terminal 113; the connecting plug-in 118 is respectively plugged into the first limiting member 116 and the second limiting member 117, so that the moving end conductive terminal 113 is sequentially clamped in the first limiting groove 119 and the second limiting groove 120.

[0056] In this embodiment, the connecting plug 118 is plugged with the first limiting member 116 and the second limiting member 117 respectively, so that the movable end conductive terminal 113 is clamped in the area surrounded by the first limiting groove 119 and the second limiting groove 120. The first limiting member 116 and the second limiting member 117 are plugged into the connecting plug 118, so that the first limiting member 116 and the second limiting member 117 are fixed on the insulating member 114, thereby limiting the movable end conductive terminal 113 from moving in a direction perpendicular to the movement of the movable contact 107, so that the movable end conductive terminal 113 can only move along one dimensional direction at all times, and there is no deflection or rotation. The contact pressure is stable and the reliability is high, which improves the stability of the contact resistance and the reliability of the conduction. Optionally, the first limiting member 116 and the second limiting member 117 are both provided with slots corresponding to the connecting plug 118, so that the connecting plug 118 can be plugged into the slots.

[0057] In an optional scheme of this embodiment, the moving end conductive terminal 113 includes a first conductive contact 121, an elastic member 122 and a second conductive contact 123 connected in sequence; the moving contact 107 moves between the first static contact 108 and the second static contact 109, so that the first conductive contact 121 abuts against the static end conductive terminal 112 of the first static contact 108 and can compress the elastic member 122, or the second conductive contact 123 abuts against the static end conductive terminal 112 of the second static contact 109 and can compress the elastic member 122.

[0058] In this embodiment, by providing the elastic member 122, the opening and closing pressure of the moving contact 107 when it moves back and forth between the first stationary contact 108 and the second stationary contact 109 can be kept unchanged, and at the same time, the contact pressure can be effectively guaranteed, thereby improving the stability of the contact resistance and the reliability of conduction.

[0059] In an optional solution of this embodiment, the dynamic end conductive terminal 113 also includes two wiring banks 126, which are respectively connected to the first conductive contact 121 and the second conductive contact 123, and the elastic member 122 is located between the two wiring banks 126, which are used to fix the soft connector 111.

[0060] Embodiment 2

[0061] The on-load voltage regulating switch in the second embodiment is an improvement on the above embodiment, and the technical contents disclosed in the above embodiment are not described repeatedly, and the contents disclosed in the above embodiment also belong to the contents disclosed in the second embodiment. That is, the reference numerals of the components in the second embodiment can refer to the reference numerals of the components in the first embodiment.

[0062] See also Figure 4 As shown, in an optional scheme of this embodiment, a first operating mechanism 124 and multiple second operating mechanisms 125 are further included; the first operating mechanism 124 is connected to multiple vacuum switch groups 104, and is used to drive the corresponding vacuum switches in the multiple vacuum switch groups 104 to be disconnected or connected at the same time; the multiple operating mechanisms are connected to the corresponding voltage-regulating switches 106 in the multiple voltage-regulating switch groups 105, and are used to drive the corresponding voltage-regulating switches 106 in the multiple voltage-regulating switch groups 105 to be disconnected or connected at the same time.

[0063] In this embodiment, the on-load voltage regulating switch needs to control the corresponding vacuum switch and the voltage regulating switch 106 in each phase circuit at the same time, and the operating mechanism is used to operate the corresponding switches to realize the simultaneous opening or closing action. Optionally, the operating mechanism can use an electric mechanism to provide driving force, or use electromagnetic force to provide driving force.

[0064] In an optional solution of this embodiment, the on-load voltage-regulating switch also includes a mounting plate arranged in the shell 101, the vacuum switch assembly 102 and the voltage-regulating switch assembly 103 are arranged on one side of the mounting plate, and the first operating mechanism 124 and the plurality of second operating mechanisms 125 are arranged on the other side of the mounting plate; a plurality of first connecting holes are provided on the mounting plate to connect the first operating mechanism 124 with the plurality of vacuum switch groups 104, and a plurality of second connecting holes are provided on the mounting plate to connect the plurality of operating mechanisms with the corresponding voltage-regulating switches 106 in the plurality of voltage-regulating switch groups 105.

[0065] In an optional scheme of this embodiment, the first operating mechanism 124 includes a first permanent magnet mechanism and a first transmission member connected to each other, the first permanent magnet mechanism is a monostable permanent magnet mechanism, and the first transmission member is connected to multiple vacuum switch groups 104; the second operating mechanism 125 includes a second permanent magnet mechanism and a second transmission member connected to each other, the second permanent magnet mechanism is a bistable permanent magnet mechanism, and the second transmission member is connected to corresponding voltage regulating switches 106 in multiple voltage regulating switch groups 105.

[0066] In this embodiment, the vacuum switch group 104 includes a first vacuum tube, a second vacuum tube, and a linkage member moving between the two, and the two ends of the linkage member are respectively connected to the moving contact ends of the first vacuum tube and the second vacuum tube to achieve the disconnection and connection between the internal moving contact end and the static contact end. Specifically, the first transmission member is connected to the linkage members in each vacuum switch group 104. Among them, the first vacuum tube is a normally open vacuum switch tube, and the second vacuum tube is a normally closed vacuum switch tube. The linkage member can realize the switching of the normally open and normally closed functions.

[0067] The first permanent magnet mechanism is a monostable permanent magnet mechanism. After power is turned on, the electromagnet drives the linkage to move, and the vacuum switch tube realizes the normally closed and normally open switching. After power is turned off, the electromagnet returns to its original state. During the process of closing and opening the switch, there will be no stagnation, but a fast reset can be achieved. The second permanent magnet mechanism is a bistable permanent magnet mechanism. The permanent magnet mechanism performs reciprocating motion to realize the switching of the contacts between normally open and normally closed. The resistance at the contacts is smaller and the conductivity is higher.

[0068] The voltage regulating switch 106 and the vacuum switch are driven by electromagnetic force, and there is no need to use mechanical structures such as electric mechanisms. The electromagnetic force is used to control the moving contact 107 to complete the movement in a straight line. The structure is simpler and the operation is more convenient. There are no mechanical structures such as gears and tension springs, so the probability of failure is lower and the reliability performance is improved. The service life of the voltage regulating switch 106 is extended. At the same time, no arc is generated during the on-load voltage regulation process, which avoids the disadvantage of carbonization of the material caused by the arc, so that users do not need to regularly perform disassembly, maintenance and oil filtering operations, thus achieving the purpose of maintenance-free. In addition, the voltage regulating switch 106 uses fewer parts, which also reduces the overall footprint of the on-load voltage regulating switch.

[0069] In an optional solution of this embodiment, a through hole is provided on the housing 101 so that the coil wiring passes through the through hole; a seal is provided at the through hole so that the coil wiring and the through hole are sealed and connected, thereby improving the sealing of the switch, and specifically can withstand a pressure difference of 60KPa. Optionally, the housing 101 can be made of metal or non-metal material.

[0070] Embodiment 3

[0071] Embodiment 3 of the present application provides a transformer, including an on-load tap-changing switch of any of the above embodiments, and thus has all the beneficial technical effects of the on-load tap-changing switch of any of the above embodiments, which will not be elaborated here.

[0072] In an optional solution of this embodiment, the top of the on-load tap changer is connected to the transformer housing 101 .

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In addition, a person skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means being within the scope of the present application and forming different embodiments.

Claims

1. An on-load voltage regulating switch, characterized in that: It comprises a housing, a vacuum switch assembly and a voltage regulating switch assembly arranged in the housing, wherein the vacuum switch assembly and the voltage regulating switch assembly are arranged side by side in a first direction of the housing; The vacuum switch assembly includes a plurality of vacuum switch groups distributed in the second direction of the housing, and the voltage regulating switch assembly includes a plurality of voltage regulating switch groups distributed in the second direction of the housing; The first direction and the second direction are arranged perpendicularly; The vacuum switch group and the voltage regulating switch group are electrically connected in a one-to-one correspondence; The voltage regulating switch group includes a plurality of voltage regulating switches which are electrically connected; The voltage regulating switch comprises a moving contact and a plurality of stationary contacts, wherein the plurality of stationary contacts comprises a first stationary contact and a second stationary contact which are arranged at intervals, wherein the moving contact can move between the first stationary contact and the second stationary contact, wherein the moving contact and the first stationary contact are normally open contacts, and wherein the moving contact and the second stationary contact are normally closed contacts; A moving contact of one of the voltage regulating switches in the voltage regulating switch group is connected to the vacuum switch group; The voltage regulating switch directly connected to the vacuum switch group is a first voltage regulating switch, and the moving contact of the first voltage regulating switch is electrically connected to the vacuum switch group through a soft connecting piece; The stationary contact is provided with a stationary end conductive terminal, and the moving contact is provided with a moving end conductive terminal, and the moving end conductive terminal can abut against the stationary end conductive terminal; The moving contact comprises an insulating member and a supporting assembly, and the supporting assembly supports and connects the moving end conductive terminal; The support assembly includes a first limiting member, a second limiting member and a connecting plug-in; the second limiting member is fixedly connected to the insulating member; The first limiting member is provided with a first limiting groove opening toward the insulating member and cooperating with the movable conductive terminal; the second limiting member is provided with a second limiting groove opening away from the insulating member and cooperating with the movable conductive terminal; The connecting plug-in is plugged into the first limiting member and the second limiting member respectively, so that the movable end conductive terminal is clamped in the first limiting groove and the second limiting groove in sequence.

2. The on-load voltage regulating switch according to claim 1, characterized in that: The moving contact of any voltage regulating switch except the first voltage regulating switch in the voltage regulating switch group is electrically connected to the static contact of the correspondingly connected voltage regulating switch through a soft connecting piece.

3. The on-load voltage regulating switch according to claim 1, characterized in that: The movable end conductive terminal comprises a first conductive contact, an elastic member and a second conductive contact which are connected in sequence; The moving contact moves between the first stationary contact and the second stationary contact, so that the first conductive contact abuts against the stationary conductive terminal of the first stationary contact and can compress the elastic member, or the second conductive contact abuts against the stationary conductive terminal of the second stationary contact and can compress the elastic member.

4. The on-load voltage regulating switch according to claim 1, characterized in that: Also includes a first operating mechanism and a plurality of second operating mechanisms; The first operating mechanism is connected to a plurality of vacuum switch groups, and is used to drive corresponding vacuum switches in the plurality of vacuum switch groups to disconnect or connect simultaneously; The plurality of operating mechanisms are connected to corresponding voltage regulating switches in the plurality of voltage regulating switch groups, and are used to drive the corresponding voltage regulating switches in the plurality of voltage regulating switch groups to be disconnected or connected simultaneously.

5. The on-load voltage regulating switch according to claim 4, characterized in that: The first operating mechanism comprises a first permanent magnet mechanism and a first transmission member connected to each other, the first permanent magnet mechanism is a monostable permanent magnet mechanism, and the first transmission member is connected to the plurality of vacuum switch groups; The second operating mechanism includes a second permanent magnet mechanism and a second transmission member connected to each other, the second permanent magnet mechanism is a bistable permanent magnet mechanism, and the second transmission member is connected to the corresponding voltage regulating switches in the plurality of voltage regulating switch groups.

6. A transformer, characterized in that: The invention comprises the on-load voltage regulating switch as claimed in any one of claims 1 to 5.

Images