A disconnecting switch and switching device

Abstract

This utility model belongs to the field of electrical equipment technology, and discloses a disconnecting switch and switching device. The disconnecting switch includes a stationary contact and a moving contact. The stationary contact includes a guide seat, a conductive rod that slides with the guide seat, a stationary arc contact at the end of the conductive rod, and a reset member connecting the guide seat and the conductive rod. The moving contact has a moving arc contact at its end, which is in conductive contact with or separates from the stationary contact, and the moving arc contact is engaged or disengaged from the stationary arc contact. The moving contact can drive the conductive rod to slide along the guide seat through the engagement of the moving arc contact and the stationary arc contact, and cause the reset member to elastically deform under the action of the conductive rod. When the moving arc contact separates from the stationary arc contact, the conductive rod and the stationary arc contact move rapidly away from the moving contact under the action of the reset member to reset, which can speed up the separation speed of the moving contact and the stationary contact, improve the disconnecting switch's ability to disconnect large currents, shorten the arcing time between the contacts, and reduce the degree of contact erosion.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a disconnecting switch and a switching device. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) includes circuit breakers, disconnectors, instrument transformers, surge arresters, busbars, connectors, and outgoing terminals. All these devices or components are enclosed in a grounded metal casing filled with pressurized SF6 insulating gas; this is also known as SF6 fully enclosed switchgear. The disconnector includes a housing, stationary contacts, and moving contacts housed within the housing. The moving contact, driven by an operating mechanism, can move to separate from or make conductive contact with the stationary contact, thus enabling the disconnector to open and close, and to conduct and interrupt current. An electric arc is generated when the moving and stationary contacts are about to make contact or have just separated. Especially when the disconnector is performing high-current interruption operations such as busbar switching, the arc between the moving and stationary contacts can severely burn the stationary and / or moving contacts. The resulting decomposition products can also contaminate the insulating components inside the switch, leading to insulation failure or reduced insulation performance, thus affecting the disconnector's breaking capacity.

[0003] In some existing disconnecting switches, the moving contact includes a first contact and a second contact coaxially passing through the first contact. A first rack is provided on one side of the first contact, meshing with a first gear. A second rack is provided on one side of the second contact, meshing with a second gear, allowing the second contact to slide within the first contact. When the contacts break, the first and second gears rotate, achieving contact separation through the two-stage gear and rack structure. However, the gear and rack transmission structure results in a low contact separation speed. This low speed leads to an excessively long arc burning time between the contacts, causing severe contact erosion and damage. This reduces the current-carrying capacity of the disconnecting switch, posing a significant safety hazard to the reliable operation of the switchgear.

[0004] Therefore, there is an urgent need for a disconnecting switch and switching device to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a disconnecting switch and switching device that can accelerate the speed of contact separation, improve the disconnecting switch's ability to interrupt large currents, and reduce the degree of contact erosion.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, a disconnecting switch is provided, including a stationary contact and a moving contact, wherein the moving contact is movable toward or away from the stationary contact;

[0008] The stationary contact includes a guide seat, a conductive rod that slides with the guide seat, a stationary arc contact located at the end of the conductive rod, and a reset member located between the guide seat and the conductive rod.

[0009] The end of the moving contact is provided with a moving arc contact, which is in conductive contact with or separate from the stationary contact, and the moving arc contact is engaged or separated from the stationary arc contact.

[0010] The moving contact can drive the conductive rod to slide along the guide seat through the engagement of the moving arc contact and the stationary arc contact, and cause the reset member to elastically deform under the action of the conductive rod.

[0011] As an optional solution for the disconnecting switch provided by this utility model, the guide seat is provided with a first guide hole, the conductive rod is slidably inserted through the first guide hole, and the reset member is disposed in the first guide hole;

[0012] The first guide hole is closed at the end away from the moving contact, and the conductive rod is provided with a piston portion protruding circumferentially at the end away from the stationary arc contact. The piston portion is sealed and slidably engaged with the inner wall of the first guide hole, and a vent hole communicating with the first guide hole is provided through the conductive rod and the stationary arc contact.

[0013] As an optional solution for the disconnecting switch provided by this utility model, the first guide hole includes a first cavity and a second cavity that are connected to each other, a first stepped surface is formed between the first cavity and the second cavity, and the end of the first cavity away from the second cavity is closed.

[0014] The conductive rod slides in contact with the inner wall of the second cavity, the piston portion is sealed and slidably fitted with the inner wall of the first cavity, and the reset member is sleeved on the conductive rod and abuts against the first stepped surface and the piston portion.

[0015] As an optional solution for the disconnecting switch provided by this utility model, a limiting part is provided on the conductive rod along the circumferential direction, and there is a gap between the limiting part and the inner wall of the second cavity. The reset member is sleeved on the limiting part, and the limiting part abuts against or separates from the first step surface.

[0016] As an optional solution to the disconnecting switch provided by this utility model, the conductive rod is provided with limit steps and slots at intervals;

[0017] The stationary contact also includes a limiting member, a washer, and a stop member. The limiting member is sleeved on the conductive rod and abuts against the limiting step. The piston part is disposed on the limiting member. The side of the piston part away from the limiting step is recessed with a mounting groove. The washer and the stop member are both sleeved on the conductive rod and located in the mounting groove. The stop member is engaged in the slot and stops the washer on the side away from the limiting step.

[0018] As an optional solution to the disconnecting switch provided by this utility model, an elastic conductive element is provided on one of the guide seat and the conductive rod, and the conductive rod and the guide seat are in sliding contact through the elastic conductive element.

[0019] As an optional solution to the disconnecting switch provided by this utility model, the static arc contact is provided with a first fastening part;

[0020] The moving arc contact includes a plurality of spaced spring pieces and a second fastening part protruding from the end of the spring pieces. The plurality of spring pieces can deform in a direction away from or close to each other.

[0021] The second fastening part is engaged or disengaged from the first fastening part.

[0022] As an optional solution to the disconnecting switch provided by this utility model, the disconnecting switch further includes a moving contact seat, the moving contact seat being provided with a second guide hole; the moving contact includes a moving main contact and a moving arc contact;

[0023] The moving main contact is slidably disposed in the second guide hole and is provided with a mounting hole. The moving arc contact also includes a cylinder and an end plate.

[0024] The end plate is connected to the first end of the cylinder and seals the opening of the cylinder. A plurality of spring pieces are connected to the second end of the cylinder and are distributed along the circumference of the cylinder. The moving arc contact is fixedly connected to the mounting hole through the end plate.

[0025] As an optional solution to the disconnecting switch provided by this utility model, the moving contact further includes a first fastener, a second fastener, and a fixing member disposed in the mounting hole;

[0026] The moving main contact is provided with a groove structure communicating with the mounting hole. A rack extending along the moving direction of the moving contact is provided in the groove structure. The rack is configured to drive the moving contact to move under the drive of the disconnecting switch's drive gear.

[0027] The end plate is connected to the fixing member by the first fastener, and the fixing member is connected to the rack by the second fastener.

[0028] In a second aspect, a switching device is provided, including the disconnecting switch as described above.

[0029] The beneficial effects of this utility model are:

[0030] This utility model provides a disconnecting switch and switching device. When the moving contact moves towards the stationary contact, it can make conductive contact with the stationary contact through the moving arc contact, thus closing the disconnecting switch. During the process of the moving contact moving away from the stationary contact to open the disconnecting switch, the moving contact engages with the stationary arc contact through its end. After engagement, the moving contact can pull the conductive rod along the guide seat through the engagement. During this process, the reset member elastically deforms under the action of the conductive rod to accumulate elastic potential energy. When the moving arc contact separates from the stationary arc contact, the reset member releases the elastic potential energy, causing the conductive rod and the stationary arc contact to move rapidly away from the moving contact under the action of the reset member to reset. That is, due to the elastic force of the reset member, the conductive rod and the stationary arc contact of the stationary contact can be driven to move at high speed away from the moving contact, which can accelerate the separation speed of the moving and stationary contacts, improve the disconnecting switch's ability to interrupt large currents, shorten the arcing time between contacts, and reduce the degree of contact erosion. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the contact assembly of the disconnecting switch provided in a specific embodiment of this utility model;

[0033] Figure 2 This is a partial schematic diagram of the moving contact provided in a specific embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the moving contact provided in a specific embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the stationary contact provided in a specific embodiment of this utility model;

[0036] Figure 5 This is a schematic diagram of the moving contact and stationary contact in cooperation according to a specific embodiment of this utility model;

[0037] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0038] Figure 7 This is a schematic diagram of the moving contact pulling the sliding structure of the stationary contact out of the guide seat according to a specific embodiment of the present invention;

[0039] Figure 8 yes Figure 7 A magnified view of a section at point B in the middle;

[0040] Figure 9 This is a first view of the moving contact and stationary contact when separated, according to a specific embodiment of this utility model;

[0041] Figure 10 This is a second view of the moving contact and stationary contact when separated, according to a specific embodiment of this utility model.

[0042] In the picture:

[0043] 1. Stationary contact; 2. Moving contact; 3. Stationary contact base; 4. Moving contact base; 5. Grounding contact;

[0044] 11. Guide seat; 12. Sliding structure; 13. Reset component; 14. Elastic conductive component;

[0045] 111. First guide hole; 1111. First cavity; 1112. Second cavity; 1113. First stepped surface; 1114. Flange;

[0046] 120. Vent hole; 121. Conductive rod; 122. Static arc contact; 123. Limiting component; 124. Washer; 125. Stop component;

[0047] 1211, Limiting step; 1212, Card slot;

[0048] 1220, First fastening part; 1221, Screw part; 1222, Sliding surface; 1223, First arc-shaped surface;

[0049] 1230. Second step surface; 1231. Piston part; 1232. Limiting part; 1233. Mounting groove;

[0050] 21. Moving main contact; 22. Moving arc contact; 23. Fixing component; 24. First fastener; 25. Second fastener; 26. Rack; 27. Locating pin;

[0051] 211. Mounting hole; 212. Groove structure;

[0052] 221. Spring clip; 222. Cylinder body; 223. End plate; 224. Second fastening part;

[0053] 2241. Second snap-fit ​​surface; 2242. Abutment surface; 2243. Second arc-shaped surface;

[0054] 231. First retaining ring; 232. Second retaining ring; 233. Connecting plate;

[0055] 31. Mounting cavity; 41. Second guide hole. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0057] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0060] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0061] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0062] The existing contact assemblies of disconnecting switches have the following defects: 1) The contact closing and opening speeds are low, typically between 0.05m / s and 0.15m / s. This low speed results in excessively long arc burning time, leading to severe contact erosion. 2) At the moment of disconnection, a high-energy arc burns inside the stationary contact shield or close to the contact. This high-energy, high-heat arc easily erodes the stationary contact, damaging it, reducing current carrying capacity, and posing a significant threat to reliable operation. 3) In related technologies, the moving contact uses a double-contact and double-gear rack structure, resulting in low transmission efficiency. Furthermore, wear on the gears and racks does not significantly improve the contact movement speed, typically only doubling it. 4) Some disconnecting switches with fast closing and opening structures have higher speeds, typically reaching around 2m / s. Their transmission structure uses a rotary method, and due to limitations in the operating mechanism, a three-position arrangement cannot be achieved. 5) If the separation speed of the moving and stationary contacts is slow, a large amount of dust (decomposition products) will be generated near the contacts, which will seriously affect the safe operation of the disconnecting switch. 6) Traditional arc contact materials are copper-tungsten alloy materials, which are prone to oxidation or ablation under long-term exposure to the high temperature of the arc. Unstable arcs are easily generated during the breaking process, reducing breaking performance and even causing breaking failure. 7) Uneven electric field distribution, especially concentrated at the top of the arc contact, may induce insulation breakdown due to electric field distortion during the breaking process, reducing equipment reliability. 8) When the insulating medium is sulfur-free environmentally friendly gas, the arc extinguishing performance of the gas is weakened, and the arc may drift erratically, causing the arc to drift to the surface of the stationary contact shield, severely ablating the stationary contact shield, leading to electric field distortion of the stationary contact and inducing insulation breakdown.

[0063] Based on the above issues, such as Figure 1 As shown, this embodiment provides a disconnecting switch, including a contact assembly comprising a stationary contact assembly and a moving contact assembly. The stationary contact assembly includes a stationary contact 1 and a stationary contact base 3, with the stationary contact 1 disposed on the stationary contact base 3. The moving contact assembly includes a moving contact 2 and a moving contact base 4, with the moving contact 2 reciprocally sliding on the moving contact base 4 so that the moving contact 2 can move towards or away from the stationary contact 1 to engage or disengage with the stationary contact 1. The disconnecting switch provided in this embodiment can accelerate the separation speed of the moving contact 2 and the stationary contact 1, improve the disconnecting switch's ability to interrupt large currents, and reduce the degree of contact erosion.

[0064] Specifically, see Figure 1 , Figure 2 , Figure 3 as well as Figure 4The stationary contact 1 includes a guide seat 11, a sliding structure 12, and a reset member 13. The sliding structure 12 includes a conductive rod 121 that slides with the guide seat 11 and a stationary arc contact 122 located at the end of the conductive rod 121. The reset member 13 is elastically deformable and positioned between the guide seat and the conductive rod. The moving contact 2 has a moving arc contact 22 at its end. The moving arc contact 22 is in conductive contact with or separates from the stationary contact 1, and it can also engage or disengage with the stationary arc contact 122. The moving contact 2 can drive the conductive rod 121 to slide along the guide seat 11 through the engagement of the moving arc contact 22 with the stationary arc contact 122, and cause the reset member 13 to elastically deform under the influence of the conductive rod 121.

[0065] When the moving contact 2 moves closer to the stationary contact 1, it can make conductive contact with the stationary contact 1 through the moving arc contact 22, thereby closing the disconnecting switch. When the moving contact 2 moves away from the stationary contact 1 to open the disconnecting switch, the moving contact 2 engages with the stationary arc contact 122 through the moving arc contact 22 at its end. After engagement, the moving contact 2 can pull the conductive rod 121 to slide along the guide seat 11 through the engagement of the two. During this period, the reset member 13 is elastically deformed under the action of the conductive rod 121 to accumulate elastic potential energy. When the moving arc contact 22 separates from the stationary arc contact 122, the reset member 13 releases elastic potential energy, causing the conductive rod 121 and the stationary arc contact 122 to move rapidly away from the moving contact 2 under the drive of the reset member 13 to reset. That is, due to the presence of the elastic force of the reset member 13, the conductive rod 121 and the stationary arc contact 122 of the stationary contact 1 can be driven to move at high speed away from the moving contact 2, which can accelerate the separation speed of the moving contact 2 and the stationary contact 1, improve the ability of the disconnecting switch to disconnect large currents, shorten the arcing time between the contacts, and reduce the degree of contact erosion.

[0066] For example, the reset element 13 is a spring, which is readily available and inexpensive. Moreover, by selecting different types of springs, different reset speeds of the stationary contact 1 can be achieved.

[0067] like Figure 2 , Figure 5 as well as Figure 6 As shown, the stationary arc contact 122 has a first fastening portion 1220 protruding from it; the moving arc contact 22 includes a plurality of spaced spring pieces 221 and a second fastening portion 224 protruding from the end of the spring pieces 221. The plurality of spring pieces 221 can deform in a direction away from or close to each other; the second fastening portion 224 is fastened or separated from the first fastening portion 1220. When the moving contact 2 moves toward the stationary contact 1, the second fastening portion 224 can slide past the first fastening portion 1220 and elastically abut against the stationary contact 1. When the disconnecting switch is opened, the moving contact 2 can drive the conductive rod 121 to slide relative to the guide seat 11 through the fastening of the second fastening portion 224 and the first fastening portion 1220.

[0068] By setting multiple elastic pieces 221 that can deform relative to each other, when the second fastening part 224 slides past the first fastening part 1220, the multiple elastic pieces 221 can be adaptively deformed, and after sliding past the first fastening part 1220, they can electrically abut against the stationary contact 1 with a certain elastic force to ensure stable contact.

[0069] In this embodiment, when the moving contact 2 moves closer to the stationary contact 1, the second latching portion 224 on the moving arc contact 22 can slide past the first latching portion 1220 on the stationary arc contact 122 and cooperate with the stationary contact 1 to close the disconnecting switch. Figure 5 and Figure 6 As shown, when the moving contact 2 and the stationary contact 1 are engaged, the moving arc contact 22 elastically abuts against the stationary contact 1 through the second fastening part 224, so that there is a certain pressure when the moving contact 2 and the stationary contact 1 are engaged, ensuring stable and good contact between the moving contact 2 and the stationary contact 1, and avoiding poor contact, large contact resistance and other phenomena.

[0070] When the moving contact 2 moves away from the stationary contact 1 to open the disconnecting switch, the second latching part 224 can latch with the first latching part 1220, such as... Figure 7 and Figure 8 As shown, after the connection is made, the moving contact 2 can pull the conductive rod 121 to slide along the guide seat 11 through the connection between the two. During this period, the reset member 13 elastically deforms under the action of the conductive rod 121. Figure 9 and Figure 10 As shown, when the moving arc contact 22 and the stationary arc contact 122 separate, the conductive rod 121, driven by the reset member 13, quickly moves away from the moving contact 2 to reset, accelerating the separation speed of the moving contact 2 and the stationary contact 1, improving the disconnecting switch's ability to interrupt large currents, shortening the arcing time between contacts, and reducing the degree of contact erosion. For example, under the action of the reset member 13, the reset speed of the sliding structure 12 of the stationary contact 1 can reach more than 0.5 m / s, effectively improving the contact breaking capacity.

[0071] In this embodiment, see Figure 4 The guide seat 11 has a first guide hole 111, the conductive rod 121 is slidably inserted through the first guide hole 111, the static arc contact 122 is partially located outside the first guide hole 111, and the reset member 13 is elastically and telescopically disposed within the first guide hole 111. (See also...) Figure 2 Multiple spring clips 221 have a second fastening part 224 protruding on one side facing each other. Combined Figure 5 and Figure 6The end of the guide seat 11 and the stationary arc contact 122 can be inserted between multiple spring pieces 221, so that the moving arc contact 22 can elastically abut against the outer wall of the guide seat 11 through the second fastening part 224. An insertion space is formed between the multiple spring pieces 221. When the moving contact 2 and the stationary contact 1 are engaged, the end of the stationary contact 1 is inserted into the insertion space. When the moving contact 2 moves in the opening direction, the second fastening part 224 slides along the stationary contact 1 until it is fastened with the first fastening part 1220 to pull out the conductive rod 121.

[0072] Multiple spring pieces 221 have a certain clamping force, which clamps the outer periphery of the guide seat 11 to ensure stable contact between the moving contact 2 and the stationary contact 1.

[0073] In some other embodiments of the moving arc contact 22, the second engaging portion 224 protrudes from the side of the plurality of spring pieces 221 facing away from each other. In this case, an insertion hole is provided on the stationary arc contact 122, and the first engaging portion 1220 protrudes from the inner wall of the insertion hole. The second engaging portion 224 of the plurality of spring pieces 221 can slide past the first engaging portion 1220 and be inserted into the insertion hole of the stationary arc contact 122. During this process, the plurality of spring pieces 221 elastically deform towards each other. When the moving contact 2 moves in the opening direction, it can also engage with the first engaging portion 1220 through the second engaging portion 224, pulling the conductive rod 121 of the stationary contact 1 out of the guide seat 11.

[0074] like Figure 1 and Figure 4 As shown, the end of the first guide hole 111 away from the moving contact 2 is closed; the end of the conductive rod 121 away from the first fastening part 1220 is provided with a piston part 1231 protruding in the circumferential direction. The piston part 1231 is sealed and slidably engaged with the inner wall of the first guide hole 111. A vent hole 120 communicating with the first guide hole 111 is provided through the conductive rod 121 and the static arc contact 122.

[0075] Since the end of the first guide hole 111 away from the first fastening part 1220 is closed, when the piston part 1231 slides in the first guide hole 111, a cylinder-piston cooperation is formed between the piston part 1231 and the first guide hole 111. When the sliding structure 12 moves and resets at high speed under the drive of the reset member 13, the piston part 1231 compresses the gas (the gas is an insulating medium, such as SF6 gas, clean air, etc.) at the end of the first guide hole 111 away from the first fastening part 1220, thus pressurizing the gas. The compressed gas is ejected through the vent 120 that passes through the conductive rod 121 and the stationary arc contact 122, and blown towards the arcing area between the moving contact 2 and the stationary contact 1, increasing the gas concentration in the arcing area, reducing the temperature of the arcing area, quickly extinguishing the arc, reducing transient overvoltage, and improving the safety when the contacts separate.

[0076] Furthermore, at the final stage of the reset of the conductive rod 121 of the stationary contact 1 under the action of the reset member 13, the high-pressure gas in the first guide hole 111 can force the speed of the conductive rod 121 to decrease, which plays a damping and buffering role, preventing the conductive rod 121 from making hard collisions with other parts and metal dust at a large speed.

[0077] Specifically, such as Figure 1 As shown, a mounting cavity 31 is provided inside the stationary contact seat 3, and the stationary contact 1 is installed inside the mounting cavity 31. (Combined with...) Figure 4 A first guide hole 111 is provided through the guide seat 11, and a flange 1114 is provided at one end of the guide seat 11. The flange 1114 is connected to the bottom wall of the stationary contact seat 3 by fasteners such as screws, so that the bottom wall of the stationary contact seat 3 can close the opening of the first guide hole 111 away from the first fastening part 1220, so that the piston part 1231 and the first guide hole 111 can form a piston and cylinder cooperation.

[0078] like Figure 4 As shown, the first guide hole 111 includes a first cavity 1111 and a second cavity 1112 that are connected. The inner diameter of the first cavity 1111 is larger than the inner diameter of the second cavity 1112, so that a first stepped surface 1113 is formed between the first cavity 1111 and the second cavity 1112. The end of the first cavity 1111 away from the second cavity 1112 is closed by the stationary contact seat 3. The conductive rod 121 slidably passes through the second cavity 1112 and slides in contact with the inner wall of the second cavity 1112. The piston part 1231 is sealed and slidably engaged with the inner wall of the first cavity 1111. A second stepped surface 1230 is provided on the side of the piston part 1231 facing the first stepped surface 1113. The reset member 13 is sleeved on the conductive rod 121 and abuts between the first stepped surface 1113 and the second stepped surface 1230 of the piston part 1231. When the passive contact 2 of the conductive rod 121 is pulled out of the guide seat 11, the piston part 1231 compresses the reset member 13 through the second step surface 1230. The reset member 13 is always limited to the extension and retraction between the first step surface 1113 and the second step surface 1230 to ensure the stability of the extension and retraction.

[0079] Further, see Figure 4 An elastic conductive element 14 is provided between the inner walls of the conductive rod 121 and the second cavity 1112 to maintain stable conductive contact between the conductive rod 121 and the guide seat 11. Specifically, the elastic conductive element 14 is installed on one of the guide seat 11 and the conductive rod 121 so that the two are in sliding contact through the elastic conductive element 14. In this embodiment, the elastic conductive element 14 is installed in a groove recessed on the outer wall of the conductive rod 121 so that the conductive rod 121 can always maintain stable and reliable conductive contact with the guide seat 11 through the elastic conductive element 14 during sliding. Optionally, the elastic conductive element 14 is a spring contact finger.

[0080] In this embodiment, a screw portion 1221 is provided on the static arc contact 122, and the screw portion 1221 is screwed onto the first end of the conductive rod 121.

[0081] See Figure 4 A limiting part 1232 protrudes circumferentially from the conductive rod 121. There is a gap between the limiting part 1232 and the inner wall of the second cavity 1112. The reset member 13 is sleeved on the limiting part 1232, and the limiting part 1232 abuts against or separates from the first step surface 1113. During the process of the passive contact 2 of the sliding structure 12 being pulled out of the guide seat 11, the limiting part 1232 gradually approaches the first step surface 1113 until it abuts against the first step surface 1113 (e.g., ...). Figure 9 As shown), after contact, the sliding structure 12 is restricted from being pulled further, and then the moving contact 2 continues to move to achieve separation from the stationary contact 1. The sliding structure 12 is then reset at high speed under the action of the reset member 13.

[0082] See also Figure 4 In some embodiments, the conductive rod 121 is provided with a limiting step 1211 and a slot 1212 at intervals. The sliding structure 12 of the stationary contact 1 also includes a limiting member 123, a washer 124, and a stop member 125. The limiting member 123 is sleeved on the conductive rod 121 and abuts against the limiting step 1211. The piston part 1231 is disposed on the limiting member 123. The side of the piston part 1231 opposite to the limiting step 1211 is recessed with an installation groove 1233. The washer 124 and the stop member 125 are both sleeved on the conductive rod 121 and located in the installation groove 1233. The stop member 125 is engaged in the slot 1212 and stops the side of the washer 124 opposite to the limiting step 1211. When installing the sliding structure 12, the conductive rod 121 is moved from the first end of the first guide hole 111 ( Figure 4 The left end of the middle) is inserted into the first guide hole 111, and the limiting member 123 is inserted from the second end of the second guide hole 41 ( Figure 4 The right end of the rod is inserted and fitted onto the conductive rod 121. Then, the washer 124 and the stop 125 are installed in sequence, which is convenient for assembly. The limiting member 123 is restricted between the limiting step 1211 and the stop 125 to prevent the limiting member 123 from moving axially along the conductive rod 121.

[0083] It is understandable that the outer diameter of the limiting part 1232 is larger than the outer diameter of the conductive rod 121, so that a stepped structure is formed between the limiting part 1232 and the conductive rod 121, thereby limiting the movement stroke of the sliding structure 12.

[0084] For example, the stop 125 is an annular retaining ring with an opening.

[0085] In this embodiment, the limiting member 123 is made of non-metallic material, so that no current flows through the reset member 13.

[0086] Of course, in some other embodiments, the limiting part 1232 and the piston part 1231 may also be integrally formed on the conductive rod 121.

[0087] like Figure 4 As shown, the first latching part 1220 is provided with an arc-shaped first latching surface, and the end of the stationary arc contact 122 also has a sliding surface 1222 and a first arc-shaped surface 1223. The first latching surface is connected to the first arc-shaped surface 1223 through the sliding surface 1222, and the first arc-shaped surface 1223 forms a rounded structure at the end of the stationary arc contact 122. See also Figure 2 The second latching part 224 has a second latching surface 2241, an abutment surface 2242, and a second arc-shaped surface 2243 connected in sequence. When the disconnecting switch is closed, the moving contact 2 first slides against the first arc-shaped surface 1223 through the second arc-shaped surface 2243. Then, the second latching part 224 slides along the sliding surface 1222 and passes over the first latching part 1220 until the moving contact 2 and the stationary contact 1 are inserted into place. The second latching part 224 elastically abuts against the outer wall of the guide seat 11 through the abutment surface 2242. When the disconnecting switch is open, the moving contact 2 abuts against the first latching surface through the second latching surface 2241, realizing the latching of the second latching part 224 with the first latching part 1220.

[0088] See Figure 1 The moving contact seat 4 is provided with a second guide hole 41. The moving contact 2 reciprocates within this second guide hole 41. Figure 3 The moving contact 2 includes a moving main contact 21 and the aforementioned moving arc contact 22. The moving main contact 21 is slidably disposed within the second guide hole 41 and is provided with a mounting hole 211. The moving arc contact 22 also includes a cylinder 222 and an end plate 223. The end plate 223 is connected to the first end of the cylinder 222 and seals the opening of the cylinder 222. Multiple spring pieces 221 are connected to the second end of the cylinder 222 and are distributed circumferentially along the cylinder 222. A second fastening part 224 is provided at the end of the spring piece 221 away from the cylinder 222. The moving arc contact 22 is fixedly connected to the mounting hole 211 through the end plate 223. There is a gap between the multiple spring pieces 221 of the moving arc contact 22 and the inner wall of the mounting hole 211, so that the multiple spring pieces 221 can elastically deform in a direction away from each other. A contact chamber is formed between the cylinder 222, the end plate 223 and the multiple spring pieces 221, and the stationary contact 1 can be inserted into the contact chamber.

[0089] Because the end plate 223 covers the opening of the cylinder 222, when the contacts separate, the high-temperature arc between the contacts will transfer heat to the moving arc contact 22, causing the gas in the contact chamber of the moving arc contact 22 to heat up and form high pressure. This causes the gas to flow out of the contact chamber. Simultaneously, the high-pressure gas ejected through the vent 120 will hit the end plate 223, causing the gas to rebound and flow out through the contact chamber, blowing towards the arc-extinguishing area, further improving the arc-extinguishing effect. Figure 10 As shown in the figure, the arrows indicate the direction of gas flow during arc extinguishing.

[0090] See Figure 3 The moving contact 2 also includes a first fastener 24, a second fastener 25, and a fixing member 23 disposed in the mounting hole 211. The fixing member 23 is connected to the moving main contact 21 via the second fastener 25; the end plate 223 is connected to the fixing member 23 via the first fastener 24. By providing the fixing member 23, it is convenient to fix the moving arc contact 22 inside the moving main contact 21.

[0091] For example, the fastener 23 includes a first fixing ring 231, a second fixing ring 232, and a connecting plate 233. The first fixing ring 231 and the second fixing ring 232 are coaxial and spaced apart, and connected by the connecting plate 233. The outer walls of both the first fixing ring 231 and the second fixing ring 232 are in contact with the inner wall of the mounting hole 211, which ensures installation stability and reduces shaking. The end plate 223 is connected to the first fixing ring 231 by a first fastener 24, and the connecting plate 233 is connected to the moving main contact 21 by a second fastener 25. The inner holes of the first fixing ring 231 and the second fixing ring 232 are connected through the internal space of the mounting hole 211, which facilitates heat dissipation. It can be understood that the end plate 223 separates the first fixing ring 231 and the cylinder 222, and the cylinder 222 and the first fixing ring 231 are not connected to each other.

[0092] Furthermore, the moving contact 2 also includes a rack 26. The moving main contact 21 has a groove structure 212 communicating with the mounting hole 211. The rack 26 is disposed in the groove structure 212 and extends along the moving direction of the moving contact 2. The rack 26 is positioned with the connecting plate 233 of the fixing member 23 by a positioning pin 27 and connected by a second fastener 25. The rack 26 is connected to the moving main contact 21 by fasteners such as screws. The disconnecting switch also includes a drive gear that meshes with the rack 26. By driving the drive gear to rotate, the rack 26 drives the entire moving contact 2 to move within the moving contact seat 4.

[0093] For example, both the first fastener 24 and the second fastener 25 are screws.

[0094] like Figure 1 As shown, the disconnecting switch also includes a grounding contact 5, and a moving contact assembly is disposed between the grounding contact 5 and the stationary contact assembly. When the moving contact 2 moves toward the grounding contact 5 to cooperate with the grounding contact 5, the disconnecting switch can be grounded.

[0095] This embodiment also provides a switching device, including the disconnecting switch as described above. The switching device is exemplarily a GIS (Gas Insulator), and further includes a circuit breaker and a linkage mechanism connected between the circuit breaker and the disconnecting switch.

[0096] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A disconnecting switch, comprising a stationary contact (1) and a moving contact (2), wherein the moving contact (2) is movable toward or away from the stationary contact (1), characterized in that, The stationary contact (1) includes a guide seat (11), a conductive rod (121) that slides with the guide seat (11), a stationary arc contact (122) disposed at the end of the conductive rod (121), and a reset member (13) disposed between the guide seat (11) and the conductive rod (121). The end of the moving contact (2) is provided with a moving arc contact (22), the moving arc contact (22) is in conductive contact with or separated from the stationary contact (1), and the moving arc contact (22) is engaged or separated from the stationary arc contact (122); The moving contact (2) can drive the conductive rod (121) to slide along the guide seat (11) through the connection between the moving arc contact (22) and the stationary arc contact (122), and cause the reset member (13) to elastically deform under the action of the conductive rod (121).

2. The disconnector according to claim 1, characterized in that The guide seat (11) is provided with a first guide hole (111), the conductive rod (121) is slidably inserted through the first guide hole (111), and the reset member (13) is provided in the first guide hole (111). The first guide hole (111) is closed at one end away from the moving contact (2), and the conductive rod (121) is provided with a piston part (1231) circumferentially protruding at one end away from the stationary arc contact (122). The piston part (1231) is sealed and slidably engaged with the inner wall of the first guide hole (111). A vent hole (120) communicating with the first guide hole (111) is provided through the conductive rod (121) and the stationary arc contact (122).

3. The disconnector according to claim 2, characterized in that The first guide hole (111) includes a first cavity (1111) and a second cavity (1112) that are connected to each other. A first stepped surface (1113) is formed between the first cavity (1111) and the second cavity (1112). The end of the first cavity (1111) away from the second cavity (1112) is closed. The conductive rod (121) slides in contact with the inner wall of the second cavity (1112), the piston part (1231) is sealed and slides in fit with the inner wall of the first cavity (1111), and the reset member (13) is sleeved on the conductive rod (121) and abuts between the first step surface (1113) and the piston part (1231).

4. The disconnector according to claim 3, characterized in that The conductive rod (121) has a circumferentially protruding limiting part (1232), and there is a gap between the limiting part (1232) and the inner wall of the second cavity (1112). The reset member (13) is sleeved on the limiting part (1232), and the limiting part (1232) abuts against or separates from the first step surface (1113).

5. The disconnector according to claim 3, characterized in that The conductive rod (121) is provided with a limiting step (1211) and a slot (1212) at intervals; The stationary contact (1) further includes a limiting member (123), a washer (124), and a stop member (125). The limiting member (123) is sleeved on the conductive rod (121) and abuts against the limiting step (1211). The piston part (1231) is disposed on the limiting member (123). The piston part (1231) has a recessed mounting groove (1233) on the side away from the limiting step (1211). The washer (124) and the stop member (125) are both sleeved on the conductive rod (121) and located in the mounting groove (1233). The stop member (125) is engaged in the slot (1212) and stops the washer (124) on the side away from the limiting step (1211).

6. The disconnector according to any of claims 1 to 5, characterized in that An elastic conductive element (14) is provided on one of the guide seat (11) and the conductive rod (121), and the conductive rod (121) and the guide seat (11) are in sliding contact through the elastic conductive element (14).

7. The disconnector according to any of claims 1 to 5, characterized in that The static arc contact (122) is provided with a first fastening part (1220); The moving arc contact (22) includes a plurality of spaced spring pieces (221) and a second fastening part (224) protruding from the end of the spring pieces (221). The plurality of spring pieces (221) can deform in a direction away from or close to each other. The second fastening part (224) is fastened or separated from the first fastening part (1220).

8. The disconnector according to claim 7, characterized in that The disconnect switch also includes a moving contact seat (4), which is provided with a second guide hole (41); the moving contact (2) includes a moving main contact (21) and a moving arc contact (22); The moving main contact (21) is slidably disposed in the second guide hole (41) and is provided with a mounting hole (211). The moving arc contact (22) also includes a cylinder (222) and an end plate (223). The end plate (223) is connected to the first end of the cylinder (222) and covers the opening of the cylinder (222). A plurality of spring pieces (221) are connected to the second end of the cylinder (222) and distributed along the circumference of the cylinder (222). The moving arc contact (22) is fixedly connected to the mounting hole (211) through the end plate (223).

9. The disconnector according to claim 8, characterized in that The moving contact (2) also includes a first fastener (24), a second fastener (25), and a fixing member (23) disposed in the mounting hole (211); The moving main contact (21) is provided with a groove structure (212) communicating with the mounting hole (211). A rack (26) extending along the moving direction of the moving contact (2) is provided in the groove structure (212). The rack (26) is configured to drive the moving contact (2) to move under the drive of the disconnecting switch's drive gear. The end plate (223) is connected to the fixing member (23) by the first fastener (24), and the fixing member (23) is connected to the rack (26) by the second fastener (25).

10. A switching device, characterized by Including the disconnecting switch as described in any one of claims 1-9.

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