Grounding switch and solid insulation ring main unit using same

Abstract

The utility model discloses a grounding switch, which comprises a moving contact and a static contact, the moving contact comprises a support frame, the support frame is provided with a sliding piece, the support frame is connected with one end of a copper rod, the other end of the copper rod is provided with two moving contact knife blades through a connecting pin in a penetrating manner, and a spring is arranged between each moving contact knife blade and the connecting pin. The spring is sleeved on the connecting pin, the moving contact disconnecting links abut against the other end of the copper rod under the action of the spring, when the supporting frame slides along the inner side wall of the solid insulation ring main unit through the sliding piece, the two moving contact disconnecting links can clamp the static contact or be separated from the static contact, and the supporting frame is further provided with a flexible connector. The utility model also discloses a solid insulation ring main unit using the grounding switch. According to the grounding switch and the solid insulation ring main unit using the grounding switch, the structure is simple, the cost is low, and surface contact is formed between a moving contact and a static contact so that the overheating phenomenon can be avoided when the moving contact and the static contact make contact with each other.

Description

TECHNICAL FIELD

[0001] The utility model relates to ring main unit technical field, especially the solid insulation ring main unit of grounding switch and use it. BACKGROUND

[0002] Solid insulation ring main unit is a group of distribution electrical equipment (high voltage switch equipment) installs in metal or nonmetal insulated cabinet or does into the electrical equipment of assembled interval formula ring net power supply unit, and its core part adopts load switch and fuse, has simple structure, small size, low price, can improve power supply parameter and performance and power supply safety and so on advantage.Solid insulation ring main unit is widely used in the distribution station and box type substation of city residential area, high -rise building, large -scale public building, factory enterprise and so on load center. SUMMARY

[0003] The utility model provides a grounding switch and solid insulation ring main unit using it that simple structure, low in cost and the face contact between movable contact and fixed contact are formed to avoid the overheat phenomenon of the contact between the two.

[0004] The grounding switch in the utility model, including movable contact and fixed contact, the movable contact includes support frame, the support frame is equipped with the sliding part for sliding connection with the inner side wall of solid insulation ring main unit, one end of copper bar is connected on the support frame, the other end of copper bar is equipped with two movable contact knife gap piece through connecting pin, two movable contact knife gap piece is located at the opposite sides of the other end of copper bar respectively, spring is equipped between movable contact knife gap piece and connecting pin, the spring is sleeved on connecting pin, movable contact knife gap piece is abutted with the other end of copper rod under the action of spring, the fixed contact is plate -shaped and is opposite arrangement with two movable contact knife gap piece, when the support frame slides along the inner side wall of solid insulation ring main unit through sliding part, two movable contact knife gap piece can clamp fixed contact or separate from fixed contact, the support frame is equipped with flexible connection still,

[0005] The support frame comprises a support plate and a support rod, the support plate is a strip-shaped plate, a support rod is arranged on one side of the support plate and is parallel to the support plate, one end of a copper bar is arranged on the other side of the support plate and is perpendicular to the support plate, the one end of the copper bar, the support plate and the support rod are fixedly connected through bolts, each of the two ends of the support rod is provided with a bearing rod, two sliding members are arranged on each of the bearing rods and are arranged along the length direction of the bearing rod, and a flexible connection is arranged on the support plate.

[0006] In the grounding switch, the sliding member is a sliding pin or a sliding block.

[0007] In the grounding switch, the other end of the copper bar is flat, two movable contact knife switches are respectively arranged on two flat sides of the other end of the copper bar, the two movable contact knife switches are respectively a first movable contact knife switch and a second movable contact knife switch, one end of the connecting pin is located on the side of the first movable contact knife switch away from the copper bar, the other end of the connecting pin sequentially passes through the first movable contact knife switch, the other end of the copper bar and the second movable contact knife switch, the other end of the connecting pin is located on the side of the second movable contact knife switch away from the copper bar, the two ends of the connecting pin are respectively sleeved with the springs, the two springs are respectively a first spring and a second spring, the first spring is sleeved at one end of the connecting pin, one end of the first spring is in abutment with the first movable contact knife switch, the other end of the first spring is in abutment on one end of the connecting pin, the second spring is sleeved at the other end of the connecting pin, one end of the second spring is in abutment with the second movable contact knife switch, and the other end of the second spring is in abutment on the other end of the connecting pin.

[0008] In the grounding switch, one end of the connecting pin is provided with a pin cap, the other end of the first spring is in abutment on the pin cap of one end of the connecting pin, the other end of the connecting pin is provided with a radial protrusion, and the other end of the second spring is in abutment on the radial protrusion of the other end of the connecting pin.

[0009] In the grounding switch, a pad is arranged between the one end of the copper bar and the other side of the support plate, and the one end of the copper bar, the pad, the support plate and the support rod are fixedly connected through bolts.

[0010] In the grounding switch, the copper bar and the static contact are both arranged as three, the three static contacts are arranged in one-to-one correspondence with the three copper bars, and the static contact is arranged in opposite to the two movable contact knife switches on the corresponding copper bar.

[0011] The solid-insulated ring main unit of this utility model includes a cabinet, a vacuum interrupter chamber inside the cabinet, and the aforementioned grounding switch inside the cabinet. A vertically arranged sliding groove is provided on the inner side wall of the cabinet, and a sliding member is slidably connected within the sliding groove. The other end of the copper rod is arranged downwards, and a stationary contact is located below the copper rod. The stationary contact is mounted on a terminal block on the cabinet. The two ends of the terminal block are located inside and outside the cabinet, respectively. The stationary contact is connected to both ends of the terminal block. The end of the terminal block inside the cabinet can be connected to or disconnected from the stationary contact end of the vacuum interrupter chamber. The end of the terminal block outside the cabinet is used to connect to electrical equipment. The flexible connection is used for grounding.

[0012] The solid-insulated ring main unit of this utility model is provided with a driving structure on the cabinet body. The driving structure can drive the support frame to slide up and down along the slide groove through the sliding member.

[0013] The grounding switch and solid-insulated ring main unit using it in this utility model differ from existing technologies in that the grounding switch in this utility model is a direct-acting grounding switch. The moving contact is vertically connected to a groove on the inner wall of the ring main unit via a sliding member, while the stationary contact is mounted on the ring main unit via a terminal block. When the grounding is closed, the end of the terminal block located inside the cabinet disconnects from the stationary contact end of the vacuum interrupter, allowing the moving contact to slide downwards until the two moving contact blades clamp the stationary contact, thus closing the grounding. At this time, the stationary contact is located between the two moving contact blades. Since the stationary contact is plate-shaped, its two opposite flat surfaces make surface contact with the two moving contact blades. Under the action of the spring, the two moving contact blades can abut against both the copper rod and the stationary contact. Furthermore, to achieve good contact between the moving and stationary contacts, the clamping force between the two moving contact blades can be adjusted by the spring, allowing both moving contact blades to simultaneously clamp the copper rod and the stationary contact. When the grounding circuit breaker is tripped, the moving contact slides upward until the two moving contact blades separate from the stationary contact, thus achieving grounding tripping. Therefore, the moving contact in this invention consists only of conventionally shaped mechanical parts, making it easy to manufacture, simple in structure, and lower in cost. Furthermore, the moving and stationary contacts can form surface contact, thereby preventing overheating during contact.

[0014] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the grounding switch in the present invention when it is in the grounding closed state. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the grounding switch in the present invention when it is in the grounding closed state.Figure 2 ;

[0017] Figure 3 Structure diagram of the grounding switch in the utility model when grounding is disconnected Figure 1 ;

[0018] Figure 4 Structure diagram of the grounding switch in the utility model when grounding is disconnected Figure 2 ;

[0019] Figure 5 Structure diagram of the static contact in the utility model;

[0020] Figure 6 Structure diagram of the dynamic contact in the utility model Figure 1 ;

[0021] Figure 7 Structure diagram of the dynamic contact in the utility model Figure 2 ;

[0022] Figure 8 Structure diagram of the dynamic contact in the utility model Figure 3 ;

[0023] Figure 9 Structure diagram of the dynamic contact in the utility model Figure 4 . DETAILED DESCRIPTION

[0024] As shown in Figure 1 and shown in Figures 2-9 , the grounding switch in the utility model includes a dynamic contact and a static contact 13, the dynamic contact includes a support frame, the support frame is provided with a sliding piece for sliding connection with the inner side wall of the solid insulation ring network cabinet, one end of a copper bar 9 is connected to the support frame, the other end of the copper bar 9 is provided with two dynamic contact knife gap pieces 10 through a connecting pin 11, the two dynamic contact knife gap pieces 10 are respectively located on the opposite sides of the other end of the copper bar 9, a spring 18 is arranged between each dynamic contact knife gap piece 10 and the connecting pin 11, the spring 18 is sleeved on the connecting pin 11, the dynamic contact knife gap piece 10 is abutted with the other end of the copper bar 9 under the action of the spring 18, the static contact 13 is plate-shaped and is arranged opposite to the two dynamic contact knife gap pieces 10, when the support frame slides along the inner side wall of the solid insulation ring network cabinet through the sliding piece, the two dynamic contact knife gap pieces 10 can clamp or separate from the static contact 13, the support frame is further provided with a flexible connection 1.

[0025] The utility model discloses a grounding switch, wherein the support frame includes support plate 3 and support rod 4, the support plate 3 is strip board, one side of support plate 3 is equipped with support rod 4, support rod 4 is parallel to support plate 3, and support rod 4 and support plate 3 are all arranged along the horizontal direction, one side of support plate 3 is equipped with one end of copper bar 9, copper bar 9 is perpendicular to support plate 3, and copper bar 9 is arranged along the vertical direction, one end (i.e. upper end) of copper bar 9, support plate 3 and support rod 4 are fixedly connected through bolt 8, so that support rod 4 and copper bar 9 are fixedly arranged on support plate 3 through bolt 8.

[0026] As Figures 1-4 , 6-9 show, the support plate 3 is equipped with soft connection 1. Soft connection 1, support plate 3 and support rod 4 are fixedly connected through bolt 2, so that soft connection 1 is fixedly arranged on support plate 3.

[0027] As Figures 1-4 , 6-9 show, the utility model discloses a grounding switch, wherein the other end (i.e. lower end) of copper bar 9 is flat, two dynamic contact knife gap pieces 10 are respectively in abutment with two flat sides of the other end of copper bar 9, i.e. the side of one dynamic contact knife gap piece 10 is in abutment with one flat side of the lower end of copper bar 9, and the side of another dynamic contact knife gap piece 10 is in abutment with another flat side of the lower end of copper bar 9, so that two dynamic contact knife gap pieces 10 respectively realize surface contact with the lower end of copper bar 9. Two dynamic contact knife gap pieces 10 are respectively first dynamic contact knife gap piece and second dynamic contact knife gap piece, one end of connecting pin 11 is located on the side of first dynamic contact knife gap piece away from copper bar 9, the other end of connecting pin 11 sequentially passes through first dynamic contact knife gap piece, the other end of copper bar 9 and second dynamic contact knife gap piece, and the other end of connecting pin 11 is located on the side of second dynamic contact knife gap piece away from copper bar 9, so that the other end of copper bar 9 is provided with two dynamic contact knife gap pieces 10 through connecting pin 11. The two ends of connecting pin 11 are respectively provided with spring 18, two springs 18 are respectively first spring and second spring, the first spring is sleeved on one end of connecting pin 11, one end of the first spring is in abutment with first dynamic contact knife gap piece, the other end of the first spring is in abutment on one end of connecting pin 11, the second spring is sleeved on the other end of connecting pin 11, one end of the second spring is in abutment with second dynamic contact knife gap piece, and the other end of the second spring is in abutment on the other end of connecting pin 11.

[0028] The utility model discloses a grounding switch, wherein one end of the connecting pin 11 is equipped with a pin cap 16, the other end of the first spring is abutted on the pin cap 16 of one end of the connecting pin 11, the other end of the connecting pin 11 is equipped with a radial protrusion 17, the other end of the second spring is abutted on the radial protrusion 17 of the other end of the connecting pin 11. When installing the first spring and the second spring, let the first spring and the second spring exist certain pre-tightening force. In this way, when the first spring is sleeved on one end of the connecting pin 11, one end of the first spring is abutted on the side of the first moving contact knife gap piece away from the copper bar 9, the other end of the first spring is abutted on the pin cap 16, under the elastic force of the first spring, the side of the first moving contact knife gap piece close to the copper bar 9 is abutted on one flat side of the lower end of the copper bar 9. Similarly, when the second spring is sleeved on the other end of the connecting pin 11, one end of the second spring is abutted on the side of the second moving contact knife gap piece away from the copper bar 9, the other end of the second spring is abutted on the radial protrusion 17, under the elastic force of the second spring, the side of the second moving contact knife gap piece close to the copper bar 9 is abutted on the other flat side of the lower end of the copper bar 9. In this way, the lower end of the copper bar 9 is clamped between the two moving contact knife gap pieces 10.

[0029] As Figure 2 , 4 , 7, 9 show, the utility model discloses a grounding switch, wherein the copper bar 9 one end (i.e. upper end) and the other side of support plate 3 between the pad 5 are equipped with, the copper bar 9 one end, pad 5, support plate 3 and support rod 4 are fixedly connected through bolt 8 between.

[0030] As Figures 1-9 Show, the utility model discloses a grounding switch, wherein the copper bar 9 and static contact 13 all are equipped with three, three copper bars 9 are evenly spaced along the length direction of support plate 3 arrangement, three static contacts 13 and three copper bars 9 one one corresponding arrangement, static contact 13 and corresponding copper bar 9 on two moving contact knife gap pieces 10 opposite arrangement.

[0031] The utility model discloses a solid insulation ring main unit, including the cabinet, be equipped with vacuum interrupter in the cabinet, still be equipped with above -mentioned grounding switch in the cabinet, be equipped with along vertical arrangement's sliding slot on the inner side wall of the cabinet, the sliding part sliding connection is in the sliding slot, the other end of copper bar 9 is arranged downward, static contact 13 is located the lower of copper bar 9, static contact 13 is equipped in a terminal post 14, terminal post 14 is equipped on the cabinet, the both ends of terminal post 14 are located the inside and outside of cabinet respectively, static contact 13 and the both ends of terminal post 14 are all communicated, the inside one end 12 of terminal post 14 in the cabinet can be connected or disconnected with the static contact end of vacuum interrupter, the one end 15 of terminal post 14 in the outside of cabinet is used to be connected with electric equipment, and soft connection 1 is used for grounding.

[0032] In the cabinet body of the solid insulation ring network cabinet, the moving contact and the static contact 13 in the grounding switch are arranged in the up-down direction, the moving contact is located above the static contact 13, the support frame of the moving contact is arranged in the horizontal direction, that is, the support plate 3 and the support rod 4 of the support frame are arranged in the horizontal direction, and the copper bar 9 is arranged in the vertical direction. When the moving contact slides along the inner side wall of the cabinet body in the vertical direction, the moving contact can be in contact with or separated from the static contact 13, when the two are in contact, the moving contact clamps the static contact 13, the grounding switch is closed, and vice versa, when the two are separated, the grounding switch is opened.

[0033] The driving structure can drive the support frame to slide up and down along the sliding groove through the sliding member. The driving structure can have various forms, and the commonly used forms are as follows: a rotating shaft is arranged on the cabinet body through a bearing, a swing arm is fixedly arranged on the rotating shaft, the swing arm is located in the cabinet body, one end of the swing arm is fixed on the rotating shaft, and the other end of the swing arm is movably connected with the upper end of the copper bar 9, that is, the other end of the swing arm is provided with a long through hole arranged in the length direction, and the upper end of the copper bar 9 is arranged on the long through hole through a pin shaft. In this way, when the rotating shaft is rotated, the swing arm rotates together with the rotating shaft, and then the other end of the swing arm drives the support frame to slide up and down along the sliding groove of the inner side wall of the cabinet body through the copper bar 9, that is, the whole moving contact slides up and down.

[0034] The grounding switch is a direct-acting grounding switch, the moving contact is connected to the inner side wall of the ring network cabinet in the vertical direction through the sliding member, and the static contact 13 is arranged on the ring network cabinet through the connecting post 14. When the grounding switch is closed, the end 12, located in the cabinet body, of the connecting post 14 is disconnected from the static contact end of the vacuum arc-extinguishing chamber, the moving contact slides downward until the two moving contact knife switches 10 clamp the static contact 13, the grounding switch is closed, and at this time, the static contact 13 is located between the two moving contact knife switches 10. Since the static contact 13 is plate-shaped, the two opposite flat sides of the static contact 13 are in surface contact with the two moving contact knife switches 10, and under the action of the spring 18, the two moving contact knife switches 10 can abut against the copper bar 9 and the static contact 13, and in order to realize good contact between the moving contact and the static contact 13, the clamping force between the two moving contact knife switches 10 can be adjusted through the spring 18, so that the two moving contact knife switches 10 can clamp the copper bar 9 and the static contact 13 at the same time. When the grounding switch is opened, the moving contact slides upward until the two moving contact knife switches 10 are separated from the static contact 13, and the grounding switch is opened. As can be seen, the moving contact in the utility model is only composed of a conventional mechanical part, is easy to process, has a simple structure, is lower in cost, and can form surface contact between the moving contact and the static contact 13, so that overheating of the moving contact and the static contact 13 during contact is avoided.

[0035] In addition, when the electrical equipment is connected with the power grid through the ring network cabinet, the grounding switch is in the grounding open state, the end 12 of the terminal pin 14 inside the cabinet is connected with the static contact end of the vacuum arc-extinguishing chamber, and then the movable and static contact of the vacuum arc-extinguishing chamber is connected. Then, when the electrical equipment is disconnected with the power grid through the ring network cabinet, the movable and static contact of the vacuum arc-extinguishing chamber is disconnected, and then the end 12 of the terminal pin 14 inside the cabinet is disconnected with the static contact end of the vacuum arc-extinguishing chamber. As can be seen, the connection and disconnection of the electrical equipment with the power grid are carried out in the grounding open state, and the grounding closing operation is carried out in the disconnection state of the electrical equipment with the power grid. When the grounding switch is in the grounding closed state, the staff can maintain and overhaul the ring network cabinet, and the safety of the staff is ensured.

[0036] As shown in Figure 5 The terminal pin 14 is a prior art, which includes a wire, the outer side of the wire is covered with an insulating material, and the two ends of the wire are the two ends of the terminal pin 14. The static contact 13 is arranged on the terminal pin 14 and connected with the wire, that is, the static contact 13 is in communication with the two ends of the terminal pin 14. The grounding switch is made of metal, for example, the flexible connection 1 and the copper rod 9 are made of copper.

[0037] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle" and the like indicate the orientation or positional relationship 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, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A grounding switch, characterized by: The utility model relates to a solid insulation ring net cabinet, including moving contact and static contact, the moving contact includes support frame, be equipped with the sliding piece for with the inside wall sliding connection of solid insulation ring net cabinet on the support frame, one end is connected with copper bar on the support frame, the other end of copper bar is equipped with two moving contact knife gap piece through the connection pin, two moving contact knife gap piece is located opposite both sides of the other end of copper bar respectively, be equipped with spring between every moving contact knife gap piece and connection pin, the spring is sleeved on the connection pin, the moving contact knife gap piece is under the action of spring and the other end of copper bar is resisted, the static contact is plate -shaped and is opposite arrangement with two moving contact knife gap piece, when the support frame passes through the sliding piece and slides along the inside wall of solid insulation ring net cabinet, two moving contact knife gap piece can press from both sides static contact or separate with static contact, still be equipped with flexible connection on the support frame, The support frame includes a support plate and a support rod, the support plate is a strip-shaped plate, one side of the support plate is provided with a support rod, the support rod is parallel to the support plate, the other side of the support plate is provided with one end of the copper bar, the copper bar is perpendicular to the support plate, one end of the copper bar, the support plate and the support rod are fixedly connected by bolts, both ends of the support rod are respectively provided with a bearing rod, two sliding pieces are arranged on each bearing rod, and the two sliding pieces on each bearing rod are arranged in a length direction of the bearing rod, and the support plate is provided with a flexible connection.

2. The grounding switch of claim 1, wherein: The sliding piece is a sliding pin or a sliding block.

3. The grounding switch of claim 2, wherein: The other end of the copper bar is flat, and the two moving contact knife gap pieces are respectively abutted with two flat sides of the other end of the copper bar. The two moving contact knife gap pieces are respectively a first moving contact knife gap piece and a second moving contact knife gap piece. One end of the connection pin is located on a side of the first moving contact knife gap piece away from the copper bar. The other end of the connection pin passes through the first moving contact knife gap piece, the other end of the copper bar and the second moving contact knife gap piece in sequence. The other end of the connection pin is located on a side of the second moving contact knife gap piece away from the copper bar. The other ends of the connection pin are respectively sleeved with the springs. The two springs are respectively a first spring and a second spring. The first spring is sleeved on one end of the connection pin. One end of the first spring is abutted with the first moving contact knife gap piece. The other end of the first spring is abutted on one end of the connection pin. The second spring is sleeved on the other end of the connection pin. One end of the second spring is abutted with the second moving contact knife gap piece. The other end of the second spring is abutted on the other end of the connection pin.

4. The grounding switch of claim 3, wherein: One end of the connection pin is provided with a pin cap. The other end of the first spring is abutted on the pin cap of one end of the connection pin. The other end of the connection pin is provided with a radial protrusion. The other end of the second spring is abutted on the radial protrusion of the other end of the connection pin.

5. The grounding switch of claim 4, wherein: A pad is arranged between one end of the copper bar and the other side of the support plate. One end of the copper bar, the pad, the support plate and the support rod are fixedly connected by bolts.

6. The grounding switch of claim 5, wherein: The copper bar and the static contact are all arranged as three. The three static contacts are arranged in one-to-one correspondence with the three copper bars. The static contact is arranged opposite to the two moving contact knife gap pieces on the corresponding copper bar.

7. A solid insulation ring main unit comprising a cabinet, a vacuum interrupter is arranged in the cabinet, characterized in that: The cabinet body is further provided with the grounding switch according to any one of claims 1-6, a sliding groove is arranged on the inner side wall of the cabinet body in the vertical direction, the sliding member is slidingly connected in the sliding groove, the other end of the copper rod is arranged downward, the static contact is located below the copper rod, the static contact is arranged on a connecting post, the connecting post is arranged on the cabinet body, the two ends of the connecting post are respectively located inside and outside the cabinet body, the static contact is in communication with the two ends of the connecting post, the end of the connecting post located inside the cabinet body can be connected with or disconnected from the static contact end of the vacuum arc-extinguishing chamber, the end of the connecting post located outside the cabinet body is used to be connected with the electric equipment, and the soft connection is used for grounding.

8. The solid insulation ring main unit according to claim 7, characterized in that: The cabinet body is further provided with a driving structure, the driving structure can drive the support frame to slide up and down along the sliding groove through the sliding member.

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