Busbar grounding switch

Abstract

The application discloses a bus grounding switch and belongs to the technical field of power distribution switch devices. The bus grounding switch comprises a bus seat, a bus plate connected to the bottom of the bus seat, a bus on-off mechanism and a bus grounding mechanism. The bus on-off mechanism can separate the bus plate from the power system when downstream power equipment fails, and the bus grounding mechanism can ground the bus. The bus on-off mechanism and the bus grounding mechanism are integrally arranged on the PT cabinet bus side and share a cabinet body with the PT cabinet, so that the number of cabinet bodies is not increased, and cost is saved. The bus grounding switch is designed in an optimized structure, the stability of the bus grounding switch is strengthened, and the bus grounding switch has the ability to close short-circuit current.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power distribution switch devices, and particularly relates to a busbar grounding switch. BACKGROUND

[0002] In a power transmission and distribution system, a grounding switch cannot be directly arranged at the busbar side, but when the power system fails, the busbar needs to be grounded for protection. At present, the common method is to arrange one more switch cabinet connected with the busbar to realize busbar grounding. However, this scheme increases the number of devices and costs due to the arrangement of the switch cabinet.

[0003] The existing Chinese utility model patent with the publication number CN222637907U discloses a busbar grounding switch operating mechanism of a gas insulated switch cabinet. The rotating handle operation hole can drive the transmission assembly to drive the busbar grounding switch to ground and open, and the elastic trigger assembly triggers the micro switch assembly. The locking assembly can lock and unlock the valve assembly. The busbar grounding switch can be operated through the operating mechanism to ground the busbar side of the switch cabinet. In actual use, the grounding of the busbar can be regarded as the short circuit of the busbar. The current amplitude rises sharply, and the magnetic field generated by the current will generate repulsive force between conductors, causing the switch blade or contact to be repelled, resulting in grounding failure. In view of this, a busbar grounding switch is provided. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the shortcomings of the prior art and provide a busbar grounding switch.

[0005] The technical scheme adopted to solve the above technical problem is:

[0006] A busbar grounding switch, comprising:

[0007] A busbar seat, wherein the bottom of the busbar seat is connected with a busbar plate;

[0008] A busbar on-off mechanism, wherein the busbar on-off mechanism comprises a moving contact and a stationary contact, the moving contact is electrically connected with the busbar seat, the moving contact is driven by a power member to approach the stationary contact from top to bottom, the moving contact is provided with a converging member, and the moving contact is in pressure contact with the stationary contact through the converging member;

[0009] A busbar grounding mechanism, wherein the busbar grounding mechanism comprises a short-circuit head and a short-circuit arm, the short-circuit head is electrically connected with the busbar seat, the short-circuit arm is grounded through a wire, the short-circuit arm is driven by a driving member two to approach the short-circuit head from bottom to top, the short-circuit arm is provided with a communication hysteresis member, and a support frame matched with the communication hysteresis member is arranged on the path of the short-circuit arm approaching the short-circuit head.

[0010] The bus bar seat is provided with three bus bar plates, and the power component connects the moving contact and the static contact in normal use, and the bus bar seat and the moving contact are electrically connected, so that the static contact is electrically connected, and power transmission is completed. When connecting, the compression component provides pressure to compress the moving contact and the static contact, so as to ensure stable connection. At this time, the short-circuit head and the short-circuit arm are separated from each other; when the bus bar plate needs to be grounded, the moving contact and the static contact are separated, and the short-circuit arm and the short-circuit head are connected, the short-circuit head and the bus bar seat are electrically connected, and the grounding of the bus bar plate is completed through the short-circuit arm. When the short-circuit arm moves upward and connects with the short-circuit head, the communication lag component makes the short-circuit arm and the short-circuit head contact each other in the horizontal direction, and can resist the repulsive force generated instantaneously, so as to prevent the short-circuit arm and the short-circuit head from being bounced away downward due to the induced force generated by the instantaneous short-circuit current, and ensure the smooth grounding of the bus bar plate.

[0011] Further, the static contact is provided with a vertical plate one and two vertical plate twos arranged at an angle of ninety degrees, the moving contact is provided with a contact plate two in pressure contact with the vertical plate one, and the moving contact is provided with two contact plate ones in pressure contact with the two vertical plate twos, and the contact plate one and the contact plate two are connected by the compression component.

[0012] Through the above technical scheme, the vertical plate one and the two vertical plate twos make the static contact have three contact surfaces, and the corresponding design of the contact plate two and the two contact plate ones of the moving contact makes the static contact contact the moving contact from three directions at the same time. This contact mode has large and dispersed contact surfaces, avoids abnormal heating caused by concentrated contact points, and simultaneously, the contact plate one and the contact plate two are pressed tightly between the static contact by the compression component, and the compression component adopts three telescopic cylinders perpendicular to the vertical plate one and the two vertical plate twos. The contact plate one and the contact plate two are respectively installed at the end of the telescopic cylinder. After engagement, the telescopic cylinder is elongated to press the contact plate one and the contact plate two on the vertical plate one and the two vertical plate twos respectively, so as to ensure stable engagement.

[0013] Further, the compression component includes two side plates, the two side plates are fixedly connected at the ends by a connecting rod, the two contact plate ones are respectively fixed at the free ends of the two side plates, a sliding frame is connected to the middle of the two side plates by a spring, the sliding frame is fixedly connected with the contact plate two, a guide frame is sleeved outside the spring, and the guide frame is slidingly connected with the sliding frame.

[0014] Through the above technical solution, another specific configuration of the converging component is disclosed. The two side plates are pulled and deformed towards the middle by springs. When the first contact plate contacts the second vertical plate, the two side plates are pushed apart to the sides. The elastic force generated by the extension of the spring presses the first contact plate against the second vertical plate to avoid loose contact. Moreover, when the moving contact engages the stationary contact, the second contact plate is squeezed away from the stationary contact, causing the slide to slide horizontally along the guide frame, further extending the spring. The spring uses the slide to press the second contact plate against the surface of the first vertical plate. The structure is simple and compact, small in size and light in weight. It is a passive structure with a purely mechanical structure, low energy consumption and failure rate, and can ensure stable contact.

[0015] Furthermore, the moving contact also includes a protrusion, which is located at the lower end of the contact plate. The thickness of the protrusion is greater than the thickness of the contact plate. The lower end of the protrusion is provided with a side blade near the corner of the stationary contact. The side blade slides in contact with the vertical side wall of the second vertical plate. The lower part of the second vertical plate is provided with a groove that cooperates with the side blade.

[0016] Through the above technical solution, in order to ensure the stable connection between the moving contact and the stationary contact, before the vertical plate two of the contact plate one contacts the stationary contact, the side edge of the convex strip slides over the vertical side wall of the vertical plate two to remove foreign objects such as protrusions and rust points, so that the surface of the vertical plate two is smooth. After the vertical side wall of the contact plate one contacts the vertical side wall of the vertical plate two, it ensures a tight fit and ensures the contact surface rib, thereby avoiding excessive contact surface resistance.

[0017] Furthermore, the power component includes a rocker arm and a drive component. One end of the rocker arm is hinged to the busbar seat, and the moving contact is installed at the other end of the rocker arm. The moving contact is electrically connected to the busbar seat through the rocker arm, and the drive component drives the rocker arm to swing up and down around the busbar seat.

[0018] Through the above technical solution, in order to achieve the engagement of the moving contact and the stationary contact, the rocker arm swings around the busbar plate, the stationary contact is at the same height as the busbar plate, and the moving contact is installed at the free end of the rocker arm, so that the moving contact can move closer to or away from the stationary contact from top to bottom. The driving component provides power for the rocker arm to swing. By using a vertically installed telescopic rod, the automated driving action can be achieved.

[0019] Furthermore, the driving component includes a relay rod, the top of which is hinged to the middle section of the rocker arm, a support rod hinged to the lower end of the relay rod, a rotating rod fixed to the end of the support rod, a rotational power source externally connected to the rotating rod, a pin installed in the middle section of the support rod, a tension spring fixedly installed in the middle of the pin, a fixed shaft located below the rotating rod fixed to the lower end of the tension spring, and the fixed shaft and the pin located on both sides of the rotating rod.

[0020] Through the above technical solution, another specific configuration of the driving component is disclosed. The rotation of the rotating rod drives the straight rod to swing, which in turn drives the middle to move up and down, thereby driving the rocker arm to swing around the busbar seat, thus making the moving contact approach and move away from the stationary contact. The purely mechanical structure has a low failure rate and completes the driving action of closing and opening. When the rocker arm swings to the lower stop point, the tension spring is located below the axis of the rotating rod and is in a stretched state. The elastic force of the tension spring applies a continuous downward force to the rocker arm 3, which increases the closing force and counteracts the repulsive force at the moment of closing. This downward force does not disappear after closing but always exists, ensuring that the moving contact and stationary contact are stable in position after closing. When the rocker arm swings to the upper stop point, the tension spring is located above the axis of the rotating rod and applies a continuous upward force to the rocker arm 3. After opening, when the rotating rod is not subjected to external force, the rocker arm will not swing downward under the action of gravity, so that the moving contact is stable in a position away from the stationary contact, resulting in high structural stability.

[0021] Furthermore, the short-circuit head includes a main body, which is fixedly connected to the busbar seat. Two shims are symmetrically installed on the vertical sidewall of the main body away from the busbar seat. The short-circuit arm includes two straight plates. The top of the two straight plates is provided with conductive forks that cooperate with the shims. A connecting post is installed in the middle section of the straight plate. The conductive forks are electrically connected to the grounding wire through the connecting post.

[0022] The above technical solution discloses the specific configuration of the short circuit head. The two-way shims arranged on both sides of the main body contact the conductive fork, with a large contact area and horizontally symmetrical shims. When the straight plate swings upward and approaches the short circuit head, it can make electrical contact from both sides. At the same time, the connecting post is connected to the ground wire and electrically connected to the conductive fork. When the shims contact the conductive fork, grounding can be completed.

[0023] Furthermore, the connecting hysteresis element includes a tensioning shaft and two gaskets. The tensioning shaft is installed through the two conductive forks, and the two gaskets are installed on the vertical sidewalls of the corresponding support of the straight plate.

[0024] The above technical solution discloses a specific configuration of a hysteresis device. Using tower-shaped springs at both ends of a tension shaft, two conductive forks are squeezed together towards the center. A gasket is installed in the middle section of a straight plate to contact the vertical sidewalls on both sides of the support. During the upward swing of the two conductive forks, as they approach the short-circuit head, the gasket first contacts the support, squeezing the two conductive forks open to the sides. When opened to their limit, the distance between them is greater than the width of the short-circuit head. At this point, the conductive forks still do not coincide with the short-circuit head, creating a horizontal connection between the conductive forks and the gasket. During the gap, when the two conductive forks swing to the upper stop point, the straight rod is in a vertical state and the conductive fork coincides with the short circuit head. At this time, the pads detach from the support frame and are squeezed by the tower-shaped springs at both ends of the tension shaft, bringing the conductive forks horizontally close to the short circuit head and in contact with the pads. At this time, the repulsive force generated by the short circuit is horizontal and will only counteract the elastic force of the tower-shaped springs at both ends of the tension shaft, preventing the straight rod from swinging downward around the shaft. This avoids the repulsive force at the moment of engagement causing the conductive forks to be bounced away, ensuring that the busbar can be successfully closed and grounded.

[0025] Furthermore, the vertical sidewall of the liner is provided with a toothed groove, and the conductive fork is equipped with a locking tooth on the vertical sidewall facing the liner, the width of the locking tooth being smaller than the width of the horizontal gap.

[0026] To ensure contact stability during short circuits, the contact surfaces of the liner and the conductive fork are equipped with locking teeth and grooves. When the conductive fork approaches the liner horizontally, the locking teeth insert into the grooves, increasing the contact area and preventing abnormal heating due to excessive contact resistance. Furthermore, the cross-section of the locking teeth is a right-angled triangle, with the right-angled side located away from the liner and the side facing the liner having an inclined design. With this structure, when magnetic repulsion occurs at the moment of contact, the right-angled side of the locking teeth directly abuts against the horizontal inner wall of the groove. In addition, the right-angled side of the locking teeth is perpendicular to the swing direction of the conductive fork, preventing the conductive fork from swinging away from the liner under the action of repulsive force, thus achieving smooth closing.

[0027] Furthermore, an insulating column is installed below the busbar seat, and a support frame is fixed at the lower part of the insulating column. The support frame is fixed to the support frame through the insulating column. The stationary contact is fixedly connected to the support frame through an insulator. The power component and the drive component are assembled and connected to the support frame and insulated.

[0028] To ensure a compact assembly, the above technical solution uses a support frame as an installation base. Insulating columns and insulators are used to suspend and fix the busbar seat and stationary contact in the air, maintaining a proper distance between them to prevent relative short circuits. The support frame is fixed using insulating columns, ensuring it can be extended to the movement path of the short-circuit arm and can be opened, while preventing electrical connection between the short-circuit arm and the support frame. The power component and drive component two are rotating parts and require bearing installation. Insulation is applied at the bearing installation locations; for example, an insulation layer can prevent electric shock to operators of drive component one and drive component two.

[0029] The beneficial effects of this invention are as follows:

[0030] (1) The present invention, through the setting of busbar seat, busbar switching mechanism and busbar grounding mechanism, can separate the busbar board from the power system when the downstream power equipment fails, and use the busbar grounding mechanism to ground the busbar. The busbar switching mechanism and the busbar grounding mechanism are integrated on the busbar side of the PT cabinet, sharing a cabinet with the PT cabinet, which will not increase the number of cabinets and save costs. The busbar grounding switch has its connection stability enhanced through the optimized design of the structure and has the ability to close short-circuit current.

[0031] (2) This invention optimizes the moving contact and stationary contact, and adds a clamping component at the moving contact position. The clamping component improves the structure by adding an elastic side plate and a movable slide to clamp the moving contact and stationary contact with three independent contact surfaces. The purely mechanical structure combination has a low failure rate and the passive clamping action is performed synchronously with the closing action.

[0032] (3) The present invention optimizes the short circuit head and short circuit arm, and adds a connection delay element on the short circuit arm. In order to cope with the magnetic induction repulsion force generated at the moment of grounding short circuit, the short circuit arm performs the engagement action from top to bottom. With the connection delay element that changes the contact direction of the short circuit head and short circuit arm to horizontal contact, it can perform horizontal engagement after swinging upward to the position, and at the same time absorb and cancel the generated repulsion force, resulting in strong engagement stability. Attached Figure Description

[0033] Figure 1 This is a structural diagram of the present invention under normal operating conditions;

[0034] Figure 2 This is a schematic diagram of the structure of the present invention under bus short-circuit conditions;

[0035] Figure 3 This is a schematic diagram of the structure between the rocker arm and the moving contact of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the stationary contact of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the moving contact of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure when the moving contact and the stationary contact of the present invention are engaged;

[0039] Figure 7 This is a schematic diagram showing the positions of the moving contact and the stationary contact when they are engaged.

[0040] Figure 8 This is a schematic diagram showing the position between the rocker arm and the drive component under normal operating conditions of the present invention;

[0041] Figure 9 This is a schematic diagram showing the position between the rocker arm and the drive component under the bus short-circuit condition of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of the present invention in the separated state between the short-circuit arm and the short-circuit head;

[0043] Figure 11 This is a schematic diagram of the structure of the present invention in the engagement state between the short-circuit arm and the short-circuit head;

[0044] Figure 12 This is a schematic diagram of the state during the closing process between the short-circuit arm and the short-circuit head of the present invention.

[0045] Reference numerals: 1. Busbar seat; 11. Insulating post; 12. Busbar plate; 2. Short-circuit connector; 21. Main body; 22. Liner; 23. Gear; 3. Rocker arm; 4. Moving contact; 41. Side plate; 411. Connecting rod; 42. Contact plate one; 43. Contact plate two; 44. Raised strip; 441. Side blade; 45. Slide; 451. Spring; 46. Guide frame; 5. Stationary contact; 51. Extension plate; 52. 53. Vertical plate 1; 54. Vertical plate 2; 55. Insulator; 56. Support lug; 67. Slot; 68. Drive component 1; 69. Repeater pole; 60. Support pole; 61. Pin; 62. Rotating rod; 63. Tension spring; 64. Fixed shaft; 70. Short circuit arm; 71. Straight plate; 72. Conductive fork; 73. Tensioning shaft; 74. Clamping tooth; 75. Washer; 76. Connecting post; 77. Horizontal gap; 8. Drive component 2; 9. Support frame. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] like Figure 1 - Figure 12As shown, this embodiment provides a busbar grounding switch. To address the increased cost caused by connecting an additional switchgear to the busbar for busbar grounding, a specific configuration is provided:

[0048] Regarding busbar connector 1, refer to... Figure 1 and Figure 2 There are three busbar sockets 1, and a busbar plate 12 is connected to the bottom of the busbar socket 1 to adapt to the three-phase power usage scenario;

[0049] Regarding the busbar switching mechanism, please refer to... Figure 1 and Figure 6 The busbar switching mechanism includes a moving contact 4 and a stationary contact 5. The moving contact 4 is electrically connected to the busbar base 1. The moving contact 4 is driven by a power component to approach the stationary contact 5 from top to bottom. The moving contact 4 is provided with a converging component, and the moving contact 4 makes contact with the stationary contact 5 by the converging component.

[0050] Regarding the busbar grounding mechanism, please refer to... Figure 2 and Figure 10 The busbar grounding mechanism includes a short-circuit head 2 and a short-circuit arm 7. The short-circuit head 2 is electrically connected to the busbar seat 1 by bolt crimping. The short-circuit arm 7 is grounded through a conductor. The short-circuit arm 7 is driven by a driving component 8 to approach the short-circuit head 2 from bottom to top. The short-circuit arm 7 is equipped with a connecting hysteresis component. A support frame 9 that cooperates with the connecting hysteresis component is provided on the path of the short-circuit arm 7 approaching the short-circuit head 2.

[0051] The working principle of this embodiment is as follows:

[0052] There are three busbar sockets 1, which are respectively connected to three busbar plates 12. During normal use, the power component drives the moving contact 4 to swing from top to bottom, so that the moving contact 4 and the stationary contact 5 are engaged. The busbar socket 1 and the moving contact 4 are electrically connected, and can be electrically connected with the stationary contact 5 to complete the power transmission. During the connection, the converging component provides pressure to make the moving contact 4 press against the stationary contact 5 to ensure stable engagement. At this time, the short circuit head 2 and the short circuit arm 7 are separated from each other and do not affect the normal connection of the busbar plate 12 to the power system.

[0053] When the busbar 12 needs to be grounded, the power component operates to separate the moving contact 4 and the stationary contact 5. Then, the short-circuit arm 7 engages with the short-circuit head 2. The short-circuit head 2 and the busbar seat 1 are electrically connected. The grounding of the busbar 12 is completed through the short-circuit arm 7. When the short-circuit arm 7 moves upward and engages with the short-circuit head 2, the connecting hysteresis component makes the short-circuit arm 7 and the short-circuit head 2 contact each other in the horizontal direction. This can counteract the instantaneous repulsive force and prevent the short-circuit arm 7 and the short-circuit head 2 from being pushed downward by the induced force generated by the instantaneous short-circuit current, thus ensuring that the busbar 12 is grounded smoothly.

[0054] In a further embodiment, refer to Figure 3 and Figure 4The stationary contact 5 has a horizontal extension plate 51, which is connected to the power system via bolted wires. A vertical plate 52 is arranged at a 90-degree angle at the end of the extension plate 51. Two lugs 55 are located on the vertical sidewall of the vertical plate 52. Two vertical plates 53 are riveted to the opposite sides of the lugs 55. The vertical plates 52 and 53 provide the stationary contact 5 with three contact surfaces. The moving contact 4 has a contact plate 43 that presses against the vertical plate 52 and two contact plates 42 that press against the two vertical plates 53. The corresponding design of the contact plates 43 and 42 of the moving contact 4 ensures that the stationary contact... The head 5 can contact the moving contact 4 simultaneously from three directions. This contact method provides a large and dispersed contact surface, avoiding abnormal heating caused by concentrated contact points. Meanwhile, the first contact plate 42 and the second contact plate 43 are connected by a converging member. The first contact plate 42 and the second contact plate 43 are pressed against the stationary contact 5 by the converging member. The converging member consists of three telescopic cylinders perpendicular to the first vertical plate 52 and the two second vertical plates 53. The first contact plate 42 and the second contact plate 43 are respectively installed at the ends of the telescopic cylinders. After engagement, the telescopic cylinders are extended by electronic control, thereby pressing the first contact plate 42 and the second contact plate 43 onto the first vertical plate 52 and the two second vertical plates 53 respectively, ensuring stable engagement.

[0055] In a further embodiment, another specific configuration of the retractor is disclosed, referring to... Figure 5 The converging component includes two side plates 41, the ends of which are fixedly connected by connecting rods 411. A slide 45 is connected to the middle section of the two side plates 41 by a spring 451. The two side plates 41 are pulled and deformed towards the center by the spring 451. Two contact plates 42 are fixed to the free ends of the two side plates 41 respectively. When the contact plates 42 contact the vertical plate 53, the two side plates 41 are pushed apart to the sides. The elastic force generated by the extension of the spring 451 presses the contact plates 42 against the vertical plate 53, preventing loose contact. Furthermore, referring to… Figure 7 The slide 45 is fixedly connected to the second contact plate 43. The outer side of the spring 451 is fitted with a guide frame 46, which is slidably connected to the slide 45. When the moving contact 4 engages with the stationary contact 5, the second contact plate 43 is squeezed away from the stationary contact 5, causing the slide 45 to slide horizontally along the guide frame 46, which further stretches the spring 451. The spring 451 uses the slide 45 to press the second contact plate 43 onto the surface of the first vertical plate 52. The structure is simple and compact, small in size and light in weight. It is a passive structure with a purely mechanical structure, low energy consumption and failure rate, and can ensure stable contact.

[0056] In a further embodiment, to ensure stable engagement between the moving contact 4 and the stationary contact 5, refer to... Figure 3 , Figure 4 and Figure 5The moving contact 4 also includes a protrusion 44, which is located at the lower end of the first contact plate 42. The thickness of the protrusion 44 is greater than that of the first contact plate 42. The lower end of the protrusion 44 is provided with a side blade 441 near the corner of the stationary contact 5. The side blade 441 slides in contact with the vertical side wall of the second vertical plate 53. Before the first contact plate 42 contacts the second vertical plate 53 of the stationary contact 5, the side blade 441 of the protrusion 44 slides over the vertical side wall of the second vertical plate 53 to remove foreign objects such as protrusions and rust spots, making the surface of the second vertical plate 53 smooth. The lower part of the second vertical plate 53 is provided with a slot 56 that cooperates with the side blade 441. After the vertical side wall of the first contact plate 42 contacts the vertical side wall of the second vertical plate 53, it ensures a tight fit and ensures the contact surface rib, thereby avoiding excessive contact surface resistance. At this time, the protrusion 44 is in the slot 56, which plays the role of locking the moving contact 4 and the stationary contact 5 together, ensuring stable connection, and also playing a limiting role to prevent the moving contact 4 from continuing to move downward.

[0057] In a further embodiment, to achieve the engagement of the moving contact 4 and the stationary contact 5, refer to Figure 1 and Figure 2 The power components include a rocker arm 3 and a drive component 6. One end of the rocker arm 3 is hinged to the busbar seat 1, and the moving contact 4 is installed at the other end of the rocker arm 3. The rocker arm 3 swings around the busbar seat 1, and the stationary contact 5 is at the same height as the busbar seat 1, so that the moving contact 4 can move closer to or away from the stationary contact 5 from top to bottom. The rocker arm 3 is made of conductive material, and the moving contact 4 is electrically connected to the busbar seat 1 through the rocker arm 3. The drive component 6 provides power for the swing of the rocker arm 3. The drive component 6 drives the rocker arm 3 to swing up and down around the busbar seat 1. The drive component 6 adopts a vertically installed telescopic rod (not shown in the figure). The telescopic rod is electrically controlled to extend and retract, which drives the rocker arm 3 to swing up and down, so as to realize the automated driving action.

[0058] In a further embodiment, another specific configuration of the drive element 6 is disclosed, referring to... Figure 8 and Figure 9 The driving component 6 includes a relay rod 61, the top of which is hinged to the middle section of the rocker arm 3. A support rod 62 is hinged to the lower end of the relay rod 61, and a rotating rod 64 is fixed to the end of the support rod 62. The rotating rod 64 is externally connected to a rotary power source, which is manually supplied. This purely mechanical structure has a low failure rate. The rotation of the rotating rod 64 causes the support rod 62 to swing, which in turn causes the relay rod 61 to move up and down, thus driving the rocker arm 3 to swing around the busbar seat 1. This causes the moving contact 4 to move closer to and further away from the stationary contact 5, completing the closing and opening actions. Furthermore, a pin 63 is installed in the middle section of the support rod 62, and a tension spring 65 is fixedly installed in the middle of the pin 63. A fixed shaft 66 located below the rotating rod 64 is fixed to the lower end of the tension spring 65. The fixed shaft 66 and the pin 63 are located on both sides of the rotating rod 64. Please refer to [reference needed]. Figure 8When rocker arm 3 swings to its lower stop point, tension spring 65 is located below the axis of rotating rod 64 and is in a stretched state. The elastic force of tension spring 65 applies a continuous downward force to rocker arm 3, increasing the closing force to counteract the repulsive force at the moment of closing. This downward force does not disappear after closing but remains constant, ensuring the stability of the moving contact 4 and stationary contact 5 after closing. Please refer to... Figure 9 When the rocker arm 3 swings to the upper stop point, the tension spring 65 is located above the axis of the rotating rod 64. The elastic force of the tension spring 65 applies a continuous upward force to the rocker arm 3. After the circuit is opened, when the rotating rod 64 is not subjected to external force, the rocker arm 3 will not swing downward under the action of gravity, so that the moving contact 4 is stabilized in a position far away from the stationary contact 5, resulting in high structural stability.

[0059] In a further embodiment, the specific configuration of the short-circuit head 2 is disclosed, referring to... Figure 10 The short-circuit head 2 includes a main body 21, which is fixedly connected to the busbar seat 1 by bolts. Two bushings 22 are symmetrically installed on the vertical sidewall of the main body 21 away from the busbar seat 1. These bushings 22 are also bolted together and can be disassembled and replaced when worn or burned. The short-circuit arm 7 includes two straight plates 71 with a gap between them. The tops of the two straight plates 71 are equipped with conductive forks 72 that mate with the bushings 22. The ends of the conductive forks 72 have a diverging design and are arranged on the main body 21. The pads 22 on both sides contact the conductive fork 72, with a large contact area. The pads 22 are horizontally symmetrically distributed. When the straight plate 71 swings upward and approaches the short-circuit head 2, electrical contact can be made from both sides. At the same time, a connecting post 76 is installed in the middle of the straight plate 71. The connecting post 76 is connected to the ground wire. The conductive fork 72 is electrically connected to the ground wire through the connecting post 76. The straight plate 71 and the conductive fork 72 are made of conductive materials, so that the connecting post 76 is electrically connected to the conductive fork 72. When the pads 22 contact the conductive fork 72, grounding can be completed.

[0060] In a further embodiment, a specific configuration of the connectivity hysteresis device is disclosed, referring to... Figure 10 The connecting hysteresis device includes a tensioning shaft 73, which is installed between the two conductive forks 72. Using tower-shaped springs at both ends of the tensioning shaft 73, the two conductive forks 72 are pressed and retracted towards the center. There are also two washers 75, installed in the middle section of the straight plate 71. The two washers 75 are installed on the vertical sidewalls of the straight plate 71 corresponding to the support 9, for contact with the vertical sidewalls on both sides of the support 9. Specifically, during the upward swinging process of the two conductive forks 72, refer to... Figure 12 When approaching the short-circuit head 2, the gasket 75 first contacts the support 9, squeezing the two conductive forks 72 to the sides and opening them. After opening to their limit, the gap is greater than the width of the short-circuit head 2. At this time, the conductive forks 72 still do not coincide with the short-circuit head 2, forming a horizontal gap 77 between the conductive forks 72 and the liner 22. Subsequently, referring to... Figure 11When the two conductive forks 72 swing to the upper stop point, the straight plate 71 is in a vertical state and the conductive forks 72 coincide with the short circuit head 2. At this time, the pads 75 are separated from the support frame 9 and are squeezed by the tower-shaped springs at both ends of the tension shaft 73, so that the conductive forks 72 are horizontally close to the short circuit head 2 and contact the pad 22. At this time, the repulsive force generated by the short circuit is horizontal and will only be counteracted by the elastic force of the tower-shaped springs at both ends of the tension shaft 73. It will not cause the straight plate 71 to swing downward around the axis, thus avoiding the repulsive force at the moment of engagement causing the conductive forks 72 to be bounced away, ensuring that the busbar is successfully closed and grounded.

[0061] In a further embodiment, to ensure the stability of the contact during a short circuit, refer to Figure 10 and Figure 11 The liner 22 has a groove 23 on its vertical sidewall. The groove 23 is vertically arranged. The conductive fork 72 has a locking tooth 74 installed on the vertical sidewall facing the liner 22. The locking tooth 74 has a right-angled triangle cross-section, with the right-angled side located away from the liner 22 and the side facing the liner 22 having an inclined design. With this structure, when magnetic repulsion occurs at the moment of contact, the right-angled side of the locking tooth 74 will directly abut against the horizontal inner wall of the groove 23. In addition, the right-angled side of the locking tooth 74 and the swing direction of the conductive fork 72... When the conductive fork 72 is horizontally close to the liner 22, the locking tooth 74 will insert into the tooth groove 23 to increase the contact area, avoid abnormal heating due to excessive contact area resistance, and prevent the conductive fork 72 from swinging away from the liner 22 under the action of repulsive force, so as to achieve smooth closing. It should be emphasized that the width of the locking tooth 74 is smaller than the width of the horizontal gap 77. The size design of the locking tooth 74 will not cause the pad 75 to detach from the support 9 and the conductive fork 72 and the liner 22 to make premature contact.

[0062] In a further embodiment, to ensure a compact assembly, refer to Figure 1 and Figure 2 An insulating column 11 is installed below the busbar seat 1. A support frame is fixed at the bottom of the insulating column 11. The stationary contact 5 is fixedly connected to the support frame by an insulator 54. A support frame is set up as an installation base. The busbar seat 1 and the stationary contact 5 are fixedly installed in the air by using the insulating column 11 and the insulator 54, and the distance between the busbar seat 1 and the stationary contact 5 is maintained to avoid relative short circuit. The support frame 9 is fixed to the support frame by the insulating column 11. The support frame 9 is fixed by the insulating column 11 and can extend to the movement path of the short-circuit arm 7 to open the short-circuit arm 7. It can also prevent the short-circuit arm 7 from being electrically connected to the support frame through the support frame 9. The power component and the second drive component 8 are assembled and connected to the support frame and are insulated. The power component and the second drive component 8 are rotating parts and need to be installed by bearings. Insulation is performed at the bearing installation position. If an insulation layer is provided, it can prevent the operators of the first drive component 6 and the second drive component 8 from being electrocuted.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A busbar grounding switch, characterized in that, include: Busbar socket (1), with a busbar plate (12) connected to the bottom of the busbar socket (1); Busbar switching mechanism, the busbar switching mechanism includes a moving contact (4) and a stationary contact (5), the moving contact (4) is electrically connected to the busbar seat (1), the moving contact (4) is driven by a power component to approach the stationary contact (5) from top to bottom, the moving contact (4) is provided with a converging member, the moving contact (4) is in contact with the stationary contact (5) through the converging member; The bus grounding mechanism includes a short-circuit head (2) and a short-circuit arm (7). The short-circuit head (2) is electrically connected to the bus base (1). The short-circuit arm (7) is grounded through a conductor. The short-circuit arm (7) is driven by a second driving member (8) to approach the short-circuit head (2) from bottom to top. The short-circuit arm (7) is provided with a connecting hysteresis member. A support (9) that cooperates with the connecting hysteresis member is provided on the path of the short-circuit arm (7) approaching the short-circuit head (2). The stationary contact (5) is provided with a vertical plate 1 (52) and two vertical plates 2 (53) arranged at a 90-degree angle. The moving contact (4) is provided with a contact plate 2 (43) that presses against the vertical plate 1 (52). The moving contact (4) is provided with two contact plates 1 (42) that press against the two vertical plates 2 (53). The contact plates 1 (42) and contact plates 2 (43) are connected by a converging member. The converging component includes two side plates (41), the ends of the two side plates (41) are fixedly connected by a connecting rod (411), two contact plates (42) are respectively fixed to the free ends of the two side plates (41), and a slide (45) is connected to the middle section of the two side plates (41) by a spring (451). The slide (45) is fixedly connected to the contact plate (43), and a guide frame (46) is sleeved on the outside of the spring (451). The guide frame (46) is slidably connected to the slide (45). The short-circuit head (2) includes a main body (21), which is fixedly connected to the busbar seat (1). Two bushings (22) are symmetrically installed on the vertical side wall of the main body (21) away from the busbar seat (1). The short-circuit arm (7) includes two straight plates (71). The top of the two straight plates (71) is provided with conductive forks (72) that cooperate with the bushings (22). A connecting post (76) is installed in the middle section of the straight plate (71). The conductive forks (72) are electrically connected to the grounding wire through the connecting post (76). The connecting hysteresis device includes a tensioning shaft (73) and two gaskets (75). The tensioning shaft (73) is installed through between the two conductive forks (72). The two gaskets (75) are installed on the vertical side wall of the straight plate (71) corresponding to the support (9). During the upward swing of the two conductive forks (72), the gaskets (75) contact the support (9) to form a horizontal gap (77) between the conductive forks (72) and the liner (22). When the two conductive forks (72) swing to the upper stop point, the gaskets (75) disengage from the support (9) to make the conductive forks (72) horizontally approach the short circuit head (2) and contact the liner (22).

2. The bus grounding switch according to claim 1, characterized in that, The moving contact (4) also includes a protrusion (44), which is located at the lower end of the first contact plate (42). The thickness of the protrusion (44) is greater than the thickness of the first contact plate (42). The lower end of the protrusion (44) is provided with a side blade (441) near the corner of the stationary contact (5). The side blade (441) slides in contact with the vertical side wall of the second vertical plate (53). The lower part of the second vertical plate (53) is provided with a slot (56) that cooperates with the side blade (441).

3. The bus grounding switch according to claim 1, characterized in that, The power component includes a rocker arm (3) and a drive component (6). One end of the rocker arm (3) is hinged to the busbar seat (1), and the moving contact (4) is installed at the other end of the rocker arm (3). The moving contact (4) is electrically connected to the busbar seat (1) through the rocker arm (3). The drive component (6) drives the rocker arm (3) to swing up and down around the busbar seat (1).

4. The bus grounding switch according to claim 3, characterized in that, The drive component (6) includes a relay rod (61), the top of which is hinged to the middle section of the rocker arm (3), and a support rod (62) is hinged to the lower end of the relay rod (61). A rotating rod (64) is fixed to the end of the support rod (62). A rotational power source is connected to the rotating rod (64). A pin (63) is installed in the middle section of the support rod (62). A tension spring (65) is fixedly installed in the middle of the pin (63). A fixed shaft (66) located below the rotating rod (64) is fixed at the lower end of the tension spring (65). The fixed shaft (66) and the pin (63) are located on both sides of the rotating rod (64). When the rocker arm (3) swings to the lower stop point, the tension spring (65) is located below the axis of the rotating rod (64). When the rocker arm (3) swings to the upper stop point, the tension spring (65) is located above the axis of the rotating rod (64).

5. The bus grounding switch according to claim 1, characterized in that, The liner (22) has a toothed groove (23) on its vertical sidewall, and the conductive fork (72) has a locking tooth (74) installed on the vertical sidewall opposite to the liner (22). The width of the locking tooth (74) is smaller than the width of the horizontal gap (77).

6. The bus grounding switch according to claim 1, characterized in that, An insulating column (11) is installed below the busbar seat (1). A support frame is fixed at the lower part of the insulating column (11). The support frame (9) is fixed on the support frame through the insulating column (11). The stationary contact (5) is fixedly connected to the support frame through an insulator (54). The power component and the second drive component (8) are assembled and connected to the support frame and are insulated.

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