Switching bus current conversion device and isolating switch

Abstract

The invention belongs to the technical field of high-voltage electrical appliances, and discloses a switching bus current conversion device and an isolating switch, the switching bus current conversion device comprises a transmission mechanism, an arc striking static contact rod and an arc striking moving contact assembly, and the arc striking static contact rod and the arc striking moving contact assembly are both arranged on a main static contact rod; the transmission mechanism is in transmission connection with the arc striking moving contact assembly, the main conductive arm can drive the transmission mechanism to act to enable the arc striking moving contact assembly to be in contact with the arc striking static contact rod when the main conductive arm is closed close to the main static contact rod, and the transmission mechanism is reset to drive the arc striking moving contact assembly to be separated from the arc striking static contact rod when the main conductive arm is separated away from the main static contact rod. The arc striking moving contact assembly does not need to move along with the main conductive arm and only needs to move along with the transmission mechanism, the motion trail is stable, the motion stroke is reliable, and the risk of burning loss of the disconnecting switch is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage electrical appliances, and in particular to a busbar current switching device and an isolating switch. Background Art

[0002] High-voltage disconnectors need to have a certain ability to switch busbar currents. According to GB / T-1985 and IEC62271-102 and other standards, the busbar switching current is generally required to be no more than 1600A. At higher current levels, the busbar switching current is even required to be no more than 2400A. Under this condition, the arcing of the conventional main conductive circuit of the disconnector during the opening and closing process will cause burning of the main contacts.

[0003] In order to solve the above problems, a set of devices is usually added to the main conductive circuit of the disconnector to achieve the ability to open and close the busbar to convert current while reducing burning. In the prior art, an arc-striking moving contact arm is generally provided on the main conductive arm of the disconnector, and an arc-striking static contact arm corresponding to the arc-striking moving contact arm is provided on the main static contact rod of the disconnector. When the main conductive arm moves toward the main static contact rod to close the switch, the main conductive arm drives the arc-striking moving contact arm to move and make it contact with the arc-striking static contact arm; when the main conductive arm moves away from the main static contact rod to open the switch, the main conductive arm drives the arc-striking moving contact arm to move and separate from the arc-striking static contact arm. The above structure reduces the arc burning time of the main static contact rod and prolongs its service life.

[0004] In the above structure, the arc-striking moving contact arm is arranged on the main conductive arm, which results in an unstable moving trajectory of the arc-striking moving contact arm and an unreliable movement stroke, thereby increasing the risk of burning of the main static contact rod. Summary of the invention

[0005] The object of the present invention is to provide a busbar switching current conversion device and a disconnecting switch, which have a stable and reliable structure and reduce the risk of burning of the disconnecting switch.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The busbar switching current device is applied to a disconnector, wherein the disconnector comprises a main static contact rod and a main conductive arm. The busbar switching current device comprises:

[0008] The arc-striking static contact rod and the arc-striking moving contact assembly are both arranged on the main static contact rod;

[0009] A transmission mechanism, which is transmission-connected to the arc-striking moving contact assembly;

[0010] When the isolating switch is closed, the main conductive arm moves close to the main static contact rod and drives the transmission mechanism to move, and the transmission mechanism drives the arc-striking moving contact assembly to contact the arc-striking static contact rod;

[0011] When the disconnector opens, the main conductive arm moves away from the main static contact bar, canceling the pressure applied to the transmission mechanism. The transmission mechanism resets and drives the arcing moving contact assembly to separate from the arcing static contact bar.

[0012] As an alternative, a fixed fixture is provided on the main static contact bar;

[0013] The transmission mechanism includes a transmission component and a rotating shaft. The rotating shaft is rotatably connected to the fixed fixture. The transmission component is in transmission connection with the rotating shaft. The arcing moving contact assembly is arranged on the rotating shaft;

[0014] When the main conductive arm closes near the main static contact bar, it can drive the transmission component to drive the rotating shaft to rotate, so as to drive the arcing moving contact assembly to contact the arcing static contact bar; when the main conductive arm opens away from the main static contact bar, the rotating shaft rotates back to its original position to drive the arcing moving contact assembly to separate from the arcing static contact bar.

[0015] As an alternative, an elastic member is further provided on the fixed fixture. One end of the elastic member is connected to the corresponding fixed fixture, and the other end is connected to the corresponding rotating shaft;

[0016] When the main conductive arm closes near the main static contact bar, the rotating shaft rotates simultaneously, so that the elastic member is twisted and stores energy;

[0017] When the main conductive arm opens away from the main static contact bar, the elastic member releases elastic potential energy to make the rotating shaft rotate back to its original position.

[0018] As an alternative, there are two fixed fixtures, two arcing static contact bars, two rotating shafts, and two arcing moving contact assemblies. The two fixed fixtures are respectively arranged at both ends of the main static contact bar. The two arcing static contact bars are respectively arranged on the two fixed fixtures. The two rotating shafts are respectively rotatably arranged on the two fixed fixtures. The two arcing moving contact assemblies are respectively arranged on the two rotating shafts. Both ends of the transmission component are connected to the two rotating shafts.

[0019] As an alternative, in the direction perpendicular to the axis of the main static contact bar, the arcing static contact bar and the arcing moving contact assembly on the fixed fixture are arranged at intervals, and the arcing static contact bar and the arcing moving contact assembly on one fixed fixture are arranged in the opposite order to those on the other fixed fixture;

[0020] The two rotating shafts rotate in opposite directions.

[0021] As an optional solution, the transmission assembly includes two transmission rods;

[0022] Wherein, one end of one of the transmission rods is fixedly connected to the first rotation shaft, and the other end is rotationally connected to the second rotation shaft;

[0023] One end of the other transmission rod is fixedly connected to the second rotating shaft, and the other end is rotationally connected to the first rotating shaft.

[0024] As an optional solution, the arc-striking moving contact assembly can generate elastic deformation when contacting the arc-striking stationary contact rod.

[0025] As an optional solution, the arc-striking moving contact assembly includes a spring plate and an arc-striking insulating block and an arc-striking moving contact arranged at both ends of the spring plate, the arc-striking insulating block is used to connect to the rotating shaft, and the arc-striking moving contact is used to contact the arc-striking static contact rod.

[0026] As an optional solution, the arc-striking static contact rod is electrically connected to the fixing fixture through a first flexible connection;

[0027] The arc-striking moving contact assembly is electrically connected to the transmission assembly via a second flexible connection.

[0028] The isolating switch comprises a main static contact rod, a main conductive arm and the opening and closing busbar current conversion device described in any of the above schemes.

[0029] Beneficial effects of the present invention:

[0030] The present invention provides a busbar current conversion device for use in an isolating switch, wherein both an arc-striking static contact rod and an arc-striking moving contact assembly are arranged on the main static contact rod, and a transmission mechanism is connected to the arc-striking moving contact assembly in a transmission manner. When the isolating switch is closed, the main conductive arm moves close to the main static contact rod while being able to drive the transmission mechanism to move so that the arc-striking moving contact assembly contacts the arc-striking static contact rod. When the isolating switch is opened, the main conductive arm moves away from the main static contact rod to cancel the pressure applied to the transmission mechanism, and the transmission mechanism is reset to drive the arc-striking moving contact assembly to separate from the arc-striking static contact rod. By providing a transmission mechanism and arranging the arc-striking moving contact assembly on the transmission mechanism, when the main conductive arm approaches or moves away from the main static contact rod, the arc-striking moving contact assembly does not need to move with the main conductive arm, but only needs to move with the transmission mechanism, and the motion trajectory is stable and the motion stroke is reliable, thereby reducing the risk of burning of the isolating switch and improving the service life of the isolating switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the switching busbar current conversion device provided by an embodiment of the present invention;

[0032] Figure 2 is the front view (excluding the main conductive arm) of the opening and closing busbar conversion current device provided by the embodiment of the present invention;

[0033] Figure 3 is the structural schematic diagram of the arc ignition moving contact component involved in the embodiment of the present invention;

[0034] Figure 4 is the structural schematic diagram of the transmission component and the rotating shaft involved in the embodiment of the present invention;

[0035] Figure 5 is the side view (excluding the main conductive arm) of the opening and closing busbar conversion current device provided by the embodiment of the present invention;

[0036] Figure 6 is the side view of the upper fixture involved in the embodiment of the present invention;

[0037] Figure 7 is the top view of the upper fixture involved in the embodiment of the present invention.

[0038] In the figure:

[0039] 1, main static contact bar;

[0040] 2, main conductive arm;

[0041] 3, opening and closing busbar conversion current device; 31, fixed fixture; 311, upper fixture; 3111, side plate; 3112, fixture connection block; 312, lower fixture; 313, fastener; 314, mounting block; 315, limit sleeve; 32, arc ignition static contact bar; 33, transmission mechanism; 331, rotating shaft; 332, transmission rod; 333, rotating plate; 34, arc ignition moving contact component; 341, spring plate; 342, arc ignition insulating block; 343, arc ignition moving contact; 344, connecting sleeve;

[0042] 4, elastic member;

[0043] 5, first flexible connection;

[0044] 6, second flexible connection. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar components or components with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first feature and the second feature, or may include the situation where the first feature and the second feature are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above and over", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and under", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0048] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] The embodiment of the present invention provides a disconnecting switch, which includes a main static contact rod 1, a main conducting arm 2, and a switching bus conversion current device 3 provided by the embodiment of the present invention.

[0050] As Figures 1-7 shown, two groups of main conducting arms 2 are provided. Along the direction perpendicular to the axis of the main static contact rod 1, the two groups of main conducting arms 2 are respectively arranged on both sides of the main static contact rod 1; when the disconnecting switch is closed, the two groups of main conducting arms 2 can approach each other and abut against the main static contact rod 1; when the disconnecting switch is opened, the two groups of main conducting arms 2 can move away from each other and separate from the main static contact rod 1.

[0051] The switching bus conversion current device 3 includes a transmission mechanism 33, an arc static contact rod 32, and an arc moving contact assembly 34. The arc static contact rod 32 and the arc moving contact assembly 34 are both arranged on the main static contact rod 1, and the transmission mechanism 33 is in transmission connection with the arc moving contact assembly 34.

[0052] When the disconnecting switch is closed, the main conducting arms 2 on both sides of the main static contact rod 1 approach the main static contact rod 1. The main conducting arm 2 can first drive the transmission mechanism 33 to act, so that the arc moving contact assembly 34 contacts the arc static contact rod 32; then, the main conducting arms 2 on both sides continue to approach each other and contact the main static contact rod 1 to complete the closing of the disconnecting switch. That is, before the disconnecting switch completes the closing action, the arc moving contact assembly 34 contacts the arc static contact rod 32 first.

[0053] When the disconnector is opened, the main conducting arms 2 on both sides of the main static contact rod 1 are far away from the main static contact rod 1. The main conducting arms 2 are separated from the main static contact rod 1 first to realize the opening of the disconnector. Then, the main conducting arms 2 are disengaged from the transmission mechanism 33 to cancel the pressure applied to the transmission mechanism 33, and at the same time, the transmission mechanism 33 resets to drive the arc-drawing moving contact assembly 34 to separate from the arc-drawing static contact rod 32. That is, the disconnector first completes the opening action, and then the arc-drawing moving contact assembly 34 separates from the arc-drawing static contact rod 32.

[0054] In the switching bus current conversion device, the arc-drawing static contact rod 32 and the arc-drawing moving contact assembly 34 are both arranged on the main static contact rod 1, and the transmission mechanism 33 is in transmission connection with the arc-drawing moving contact assembly 34. When the main conducting arm 2 closes in towards the main static contact rod 1, it can drive the transmission mechanism 33 to act, so that the transmission mechanism 33 drives the arc-drawing moving contact assembly 34 to contact the arc-drawing static contact rod 32. When the main conducting arm 2 opens away from the main static contact rod 1, the transmission mechanism 33 resets to drive the arc-drawing moving contact assembly 34 to separate from the arc-drawing static contact rod 32. By arranging the transmission mechanism 33 and arranging the arc-drawing moving contact assembly 34 on the main static contact rod 1 and in transmission connection with the transmission mechanism 33, when the main conducting arm 2 approaches or moves away from the main static contact rod 1, the arc-drawing moving contact assembly 34 does not need to move together with the main conducting arm 2, but only needs to follow the movement of the transmission mechanism 33. The movement track is stable and the action stroke is reliable, reducing the risk of burning of the disconnector and improving the service life of the disconnector.

[0055] Specifically, a fixed fixture 31 is arranged on the main static contact rod 1. The transmission mechanism 33 includes a transmission component and a rotating shaft 331. The arc-drawing static contact rod 32 is arranged on the fixed fixture 31. The transmission mechanism 33 includes a transmission component and a rotating shaft 331. The rotating shaft 331 is rotatably arranged on the fixed fixture 31 through an insulating sleeve. The transmission component is in transmission connection with the rotating shaft 331, and the arc-drawing moving contact assembly 34 is arranged on the rotating shaft 331. When the disconnector closes, the main conducting arms 2 on both sides of the main static contact rod 1 both approach the main static contact rod 1. The main conducting arms 2 can first drive the transmission component to act to drive the rotating shaft 331 to rotate. During the rotation of the rotating shaft 331, it can drive the arc-drawing moving contact assembly 34 to contact the arc-drawing static contact rod 32. Then, the main conducting arms 2 on both sides continue to approach each other and contact the main static contact rod 1 to realize the closing of the disconnector. That is, before the disconnector completes the closing action, the arc-drawing moving contact assembly 34 contacts the arc-drawing static contact rod 32 first. When the disconnector opens, the main conducting arms 2 on both sides of the main static contact rod 1 are far away from the main static contact rod 1. The main conducting arms 2 are separated from the main static contact rod 1 first to realize the opening of the disconnector. Then, the main conducting arms 2 are disengaged from the transmission component, and at the same time, the rotating shaft 331 rotates and resets to drive the arc-drawing moving contact assembly 34 to separate from the arc-drawing static contact rod 32. That is, the disconnector first completes the opening action, and then the arc-drawing moving contact assembly 34 separates from the arc-drawing static contact rod 32.

[0056] Optionally, in order to achieve that during the closing process of the disconnector, the arcing moving contact assembly 34 first contacts the arcing static contact rod 32, and during the opening process, the arcing moving contact assembly 34 separates from the arcing static contact rod 32 later, the arcing moving contact assembly 34 can produce elastic deformation. That is, when the disconnector is closed and the arcing moving contact assembly 34 contacts the arcing static contact rod 32, the arcing moving contact assembly 34 produces elastic deformation so that the main conducting arm 2 can continue to approach the main static contact rod 1 to achieve closing; when the disconnector is opened, the main conducting arm 2 moves away from the main static contact rod 1. At this time, due to the elastic deformation of the arcing moving contact assembly 34, during the process of the main conducting arm 2 moving away from the main static contact rod 1, the arcing moving contact assembly 34 restores the deformation and continues to maintain contact with the arcing static contact rod 32. After the main conducting arm 2 is completely disengaged from the transmission assembly, the arcing moving contact assembly 34 separates from the arcing static contact rod 32.

[0057] Specifically, referring to Figure 3 As shown, the arcing moving contact assembly 34 includes a spring plate 341, and an arcing insulating block 342 and an arcing moving contact 343 (copper-tungsten alloy) arranged at both ends of the spring plate 341. The arcing insulating block 342 is used to connect with the rotating shaft 331, and the arcing moving contact 343 is used to contact the arcing static contact rod 32. In this structure, the arcing insulating block 342 is connected with the rotating shaft 331 so that when the rotating shaft 331 rotates, it drives the spring plate 341 and the arcing moving contact 343 to move simultaneously through the arcing insulating block 342. After the arcing moving contact 343 contacts the arcing static contact rod 32, the spring plate 341 undergoes elastic deformation.

[0058] Optionally, in order to facilitate the connection between the arcing insulating block 342 and the rotating shaft 331, a connecting sleeve 344 is arranged on the rotating shaft 331. The connecting sleeve 344 is sleeved on the rotating shaft 331 and fixed by screws. The arcing insulating block 342 is arranged on the connecting sleeve 344 by screws.

[0059] In this embodiment, two spring plates 341 are arranged, and the two spring plates 341 are arranged at intervals. The arcing insulating block 342 and the arcing moving contact 343 are clamped between the two spring plates 341. By arranging two spring plates 341, the elastic deformation ability of the arcing moving contact assembly 34 is strong, effectively improving the service life of the spring plate 341.

[0060] Optionally, the spring plate 341 is made of tin bronze.

[0061] Optionally, referring again to Figures 1-2As shown in the figure, there are two fixed fixtures 31, two arc ignition static contact rods 32 and two arc ignition moving contact assemblies 34. The two fixed fixtures 31 are respectively arranged at both ends of the main static contact rod 1. The two arc ignition static contact rods 32 are respectively arranged on the two fixed fixtures 31. The transmission mechanism 33 includes a transmission component and two rotating shafts 331. The two rotating shafts 331 are respectively rotatably arranged on the two fixed fixtures 31. Both ends of the transmission component are respectively connected to the two rotating shafts 331. The two arc ignition moving contact assemblies 34 are respectively arranged on the two rotating shafts 331. In this structure, the two sets of arc ignition moving contacts 343 are respectively in contact with the arc ignition static contact rods 32. Compared with a set of arc ignition moving contacts 343 and arc ignition static contact rods 32, the arc fusion welding consumption of the arc ignition moving contacts 343 and the arc ignition static contact rods 32 can be reduced, and the service life can be improved.

[0062] Optionally, the disconnecting switch further includes two elastic members 4 arranged on the fixed fixture 31. One end of each elastic member 4 is connected to the corresponding fixed fixture 31, and the other end is connected to the corresponding rotating shaft 331. When the disconnecting switch is closed, the main conducting arm 2 drives the transmission component to drive the two rotating shafts 331 to rotate, and the two elastic members 4 are twisted and store energy. When the disconnecting switch is opened, the two elastic members 4 release elastic potential energy to respectively rotate the two rotating shafts 331 back to their original positions. This structure enables the rotating shaft 331 to automatically rotate back to its original position by setting the elastic member 4.

[0063] In the direction perpendicular to the axis of the main static contact rod 1, the arc ignition static contact rods 32 and the arc ignition moving contact assemblies 34 arranged on the fixed fixture 31 are arranged at intervals, and the arrangement order of the arc ignition static contact rods 32 and the arc ignition moving contact assemblies 34 on one fixed fixture 31 is opposite to that on the other fixed fixture 31. The transmission component can drive the two rotating shafts 331 to rotate in opposite directions, that is, the rotation directions of the two rotating shafts 331 are opposite, so that the two arc ignition moving contact assemblies 34 can rotate in opposite directions and respectively abut against the two arc ignition static contact rods 32; the elastic member 4 can be selected as a torsion spring, and the winding directions of the two torsion springs are opposite.

[0064] As Figure 4 and combined with Figure 1 shown, specifically, the transmission component includes two transmission rods 332 (the material is T2Y, that is, copper).

[0065] One end of a transmission rod 332 is fixedly connected to the first rotating shaft 331, and the other end is rotatably connected to the second rotating shaft 331. One end of the other transmission rod 332 is fixedly connected to the second rotating shaft 331, and the other end is rotatably connected to the first rotating shaft 331. In this structure, one end of the transmission rod 332 is fixedly connected to a rotating shaft 331 so that the transmission rod 332 can drive the rotating shaft 331 to rotate, and the other end is rotatably connected to another rotating shaft 331 so that the other rotating shaft 331 can support the transmission rod 332 without affecting the rotation of the transmission rod 332.

[0066] When the main conductive arms 2 on both sides of the main static contact bar 1 approach each other, they can respectively contact the two transmission rods 332 and drive the two transmission rods 332 to rotate and approach each other with the rotating shaft 331 as the axis. The two transmission rods 332 respectively drive the two rotating shafts 331 to rotate in opposite directions; when the main conductive arms 2 on both sides of the main static contact bar 1 move away from each other, the two elastic members 4 release elastic potential energy to enable the two rotating shafts 331 to return to their original positions.

[0067] To achieve the rotational connection between the transmission rod 332 and the rotating shaft 331, the transmission mechanism 33 further includes two rotating plates 333. The two rotating plates 333 are rotatably sleeved on the two rotating shafts 331, and the other ends of the two transmission rods 332 are respectively fixedly connected to the rotating plates 333 on the two rotating shafts 331.

[0068] Optionally, referring to Figure 3 and Figure 5 As shown, the disconnector further includes a first flexible connection 5 and a second flexible connection 6. The arc-drawing static contact bar 32 is electrically connected to the fixed clamp 31 through the first flexible connection 5, and the spring plate 341 in the arc-drawing moving contact assembly 34 is electrically connected to the two transmission rods 332 through the second flexible connection 6. In this structure, the fixed clamp 31 is arranged on the main static contact bar 1, realizing the electrical conduction between the arc-drawing static contact bar 32 and the main static contact bar 1; when the main conductive arm 2 contacts the transmission rod 332, the electrical conduction between the main conductive arm 2 and the arc-drawing moving contact assembly 34 is realized.

[0069] Optionally, the fixed clamp 31 includes an upper clamp 311, a lower clamp 312 and a fastener 313. Grooves are provided on the opposite sides of the upper clamp 311 and the lower clamp 312. The main static contact bar 1 is clamped between the grooves of the upper clamp 311 and the lower clamp 312, and the fastener 313 is used to lock the upper clamp 311 and the lower clamp 312. This structure makes the installation of the fixed clamp 31 convenient.

[0070] Specifically, as shown in Figure 6As shown in the figure, the upper fixture 311 includes a fixture connection block 3112 and two side plates 3111. The fixture connection block 3112 is arranged between the two side plates 3111 and is connected by screws. Grooves are provided on one side of the fixture connection block 3112 and the two side plates 3111 facing the lower fixture 312. The fastener 313 includes two bolts, and the bolts pass through the fixture connection block 3112 and the lower fixture 312 to connect the upper fixture 311 and the lower fixture 312.

[0071] For the convenience of installing the arc-starting static contact rod 32 and achieving the limit of the arc-starting moving contact assembly 34, refer to Figure 7 As shown in the figure, the upper fixture 311 is provided with a mounting block 314 and a limit sleeve 315. The mounting block 314 and the limit sleeve 315 are clamped and installed between the two side plates 3111 and are located above the fixture connection block 3112. The arc-starting static contact rod 32 is arranged on the mounting block 314. When the arc-starting moving contact assembly 34 is separated from the arc-starting static contact rod 32, it can abut against the limit sleeve 315 to limit the arc-starting moving contact assembly 34.

[0072] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A busbar current switching device for use on a disconnector, wherein the disconnector comprises a main static contact rod (1) and a main conductive arm (2), and is characterized in that: The switching busbar current conversion device comprises: An arc-striking static contact rod (32) and an arc-striking moving contact assembly (34) are both arranged on the main static contact rod (1); A transmission mechanism (33) is transmission-connected to the arc-striking moving contact assembly (34); When the isolating switch is closed, the main conductive arm (2) moves close to the main static contact rod (1), driving the transmission mechanism (33) to operate, and the transmission mechanism (33) drives the arc-striking moving contact assembly (34) to contact the arc-striking static contact rod (32); When the isolating switch is opened, the main conductive arm (2) moves away from the main static contact rod (1) to cancel the pressure applied to the transmission mechanism (33), and the transmission mechanism (33) is reset and drives the arc-striking moving contact assembly (34) to separate from the arc-striking static contact rod (32).

2. The busbar switching current conversion device according to claim 1, characterized in that: The main static contact rod (1) is provided with a fixing fixture (31); The transmission mechanism (33) comprises a transmission assembly and a rotating shaft (331), the rotating shaft (331) is rotatably connected to the fixing fixture (31), the transmission assembly is transmission-connected to the rotating shaft (331), and the arc-striking moving contact assembly (34) is arranged on the rotating shaft (331); When the main conductive arm (2) is close to the main static contact rod (1) for closing, it can drive the transmission assembly to drive the rotating shaft (331) to rotate, so as to drive the arc-striking moving contact assembly (34) to contact the arc-striking static contact rod (32); when the main conductive arm (2) is away from the main static contact rod (1) for opening, the rotating shaft (331) rotates and resets, so as to drive the arc-striking moving contact assembly (34) to separate from the arc-striking static contact rod (32).

3. The busbar switching current conversion device according to claim 2, characterized in that: It also includes an elastic member (4) arranged on the fixing fixture (31), one end of the elastic member (4) being connected to the corresponding fixing fixture (31), and the other end of the elastic member (4) being connected to the corresponding rotating shaft (331); When the main conductive arm (2) is close to the main static contact rod (1) to close the switch, the rotating shaft (331) rotates at the same time, so that the elastic member (4) is twisted to store energy; When the main conductive arm (2) moves away from the main static contact rod (1) to open the switch, the elastic member (4) releases elastic potential energy to allow the rotating shaft (331) to rotate and return to its original position.

4. The busbar switching current conversion device according to claim 2, characterized in that: The fixing fixture (31), the arc-striking static contact rod (32), the rotating shaft (331) and the arc-striking moving contact assembly (34) are each provided with two fixing fixtures (31), respectively, being provided at the two ends of the main static contact rod (1); the two arc-striking static contact rods (32) are respectively provided on the two fixing fixtures (31); the two rotating shafts (331) are respectively rotatably provided on the two fixing fixtures (31); the two arc-striking moving contact assemblies (34) are respectively provided on the two rotating shafts (331); and the two ends of the transmission assembly are respectively connected to the two rotating shafts (331).

5. The busbar switching current conversion device according to claim 4, characterized in that: Along a direction perpendicular to the axis of the main static contact rod (1), the arc-striking static contact rod (32) and the arc-striking moving contact assembly (34) located on the fixed fixture (31) are arranged at intervals, and the arc-striking static contact rod (32) and the arc-striking moving contact assembly (34) on one fixed fixture (31) are arranged in an opposite order to the arc-striking static contact rod (32) and the arc-striking moving contact assembly (34) on another fixed fixture (31); The two rotating shafts (331) rotate in opposite directions.

6. The busbar switching current conversion device according to claim 5, characterized in that: The transmission assembly includes two transmission rods (332); Wherein, one end of one of the transmission rods (332) is fixedly connected to the first rotating shaft (331), and the other end is rotationally connected to the second rotating shaft (331); One end of the other transmission rod (332) is fixedly connected to the second rotating shaft (331), and the other end is rotationally connected to the first rotating shaft (331).

7. The busbar switching current conversion device according to claim 1, characterized in that: The arc-striking moving contact assembly (34) is capable of generating elastic deformation when in contact with the arc-striking stationary contact rod (32).

8. The busbar switching current conversion device according to claim 2, characterized in that: The arc-striking moving contact assembly (34) comprises a spring plate (341) and an arc-striking insulating block (342) and an arc-striking moving contact (343) arranged at both ends of the spring plate (341); the arc-striking insulating block (342) is used to be connected to the rotating shaft (331), and the arc-striking moving contact (343) is used to contact the arc-striking static contact rod (32).

9. The busbar switching current conversion device according to claim 2, characterized in that: The arc-striking static contact rod (32) is electrically connected to the fixing fixture (31) via a first flexible connection (5); The arc-striking moving contact assembly (34) is electrically connected to the transmission assembly via a second flexible connection (6).

10. Isolating switch, characterized in that: It comprises a main static contact rod (1), a main conductive arm (2) and a busbar current switching device as claimed in any one of claims 1 to 9.

Images