Totally enclosed disconnecting switch

Abstract

The utility model relates to a kind of fully enclosed disconnectors, fully enclosed disconnectors include: static contact subassembly, it includes the contact seat of the tubular structure configured to have axial open end and axial closed end and the static contact fixed to the axial closed end inside contact seat of contact seat;Moving contact subassembly, it includes the contact arm attached to the axial open end of contact seat to close contact seat, the moving contact fixed to the contact arm by the junction surface of the outer periphery of the axial open end of contact seat and extend into contact seat with static contact engagement, and the moving contact insulating layer at least wraps the surface of contact arm except junction surface;Wherein, contact arm includes the moving contact conducting plate and moving contact support plate of the axial superposition of contact seat, moving contact conducting plate is arranged adjacent contact seat and the surface facing contact seat has junction surface, moving contact support plate is located on the side of moving contact conducting plate away from contact seat and is made of the material that the rigidity of moving contact insulating layer is greater.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a fully enclosed disconnect switch. Background Technology

[0002] Disconnecting switches, as important switching devices in power systems, are widely used in maintenance work. They form a visible electrical break to isolate the part to be maintained from the energized part, thereby ensuring the personal safety of operators. A disconnecting switch may include an insulating support column, contact components mounted on the insulating support column, and conductive components that connect the contact components to an external circuit to form a conductive path. The conductive components are insulated and isolated from ground potential by means of the insulating support column, thereby ensuring the safe operation of the equipment.

[0003] However, existing disconnect switches are typically installed outdoors, which exposes their conductive components to the atmosphere for extended periods, potentially leading to various reliability issues. For example, conductive components may suffer from electrochemical corrosion due to continuous air oxidation and sulfide erosion, or become contaminated and damaged by rainwater, dust, plant debris, insect remains, and other environmental contaminants. This is especially true in harsh conditions such as coastal salt spray environments and high-altitude, high-radiation environments. These conditions can cause arc flashover accidents, particularly during high-voltage operation, significantly reducing the safety and reliability of the disconnect switch.

[0004] Therefore, there is a demand in this field for disconnecting switches with high insulation performance, high safety and reliability. Utility Model Content

[0005] The present invention aims to provide a fully enclosed isolating switch that can at least solve some of the problems mentioned above.

[0006] According to one aspect of the present invention, a fully enclosed disconnecting switch is provided, the fully enclosed disconnecting switch comprising: a stationary contact assembly including a cylindrical contact seat configured to have an axially open end and an axially closed end, and a stationary contact fixed inside the contact seat to the axially closed end of the contact seat; a moving contact assembly including a contact arm attached to the axially open end of the contact seat to close the contact seat, a moving contact fixed to the contact arm with a mating surface defined by the outer periphery of the axially open end of the contact seat and extending into the contact seat to engage with the stationary contact, and a moving contact insulating layer covering at least the surface of the contact arm other than the mating surface; wherein the contact arm includes a moving contact conductive plate and a moving contact support plate stacked along the axial direction of the contact seat, the moving contact conductive plate being arranged adjacent to the contact seat and having the mating surface on its surface facing the contact seat, and the moving contact support plate being located on the side of the moving contact conductive plate facing away from the contact seat and being made of a material with greater stiffness than the moving contact insulating layer.

[0007] Compared with existing technologies, the fully enclosed disconnecting switch provided by this invention encloses the entire contact arm of the moving contact assembly and houses the joined moving and stationary contacts within a closed space formed by the contact seat and the contact arm. This isolates the moving contact conductive plate, moving contact, and stationary contact from the external environment, thereby reducing the risk of environmental contamination to the conductive components of the fully enclosed disconnecting switch. Furthermore, considering that the contact arm of the fully enclosed disconnecting switch also needs to accommodate transmission components to achieve movement of the moving contact relative to the stationary contact, this invention provides a moving contact support plate for supporting the moving contact conductive plate, in addition to providing an insulating layer for the moving contact.

[0008] Preferably, the stationary contact assembly further includes a stationary contact insulation layer covering at least the surface of the contact seat except for the side facing the contact arm at the axially closed end, and the contact seat is made of a material with greater stiffness than the stationary contact insulation layer.

[0009] Preferably, the moving contact insulation layer and the stationary contact insulation layer are made of the same insulating material, wherein both the moving contact insulation layer and the stationary contact insulation layer are made of silicone rubber.

[0010] Preferably, the contact seat includes a cylindrical support seat configured with an axially open end and an axially closed end, and a stationary contact conductive plate fixed inside the support seat to the axially closed end of the support seat, wherein the stationary contact is fixedly mounted to the side of the stationary contact conductive plate facing the contact arm.

[0011] Preferably, the fully enclosed disconnector further includes a wiring assembly for connecting the stationary contact assembly to an external cable, wherein the wiring assembly includes a wiring body extending through the stationary contact insulation layer and the support base to connect to the stationary contact conductive plate, and a wiring insulation layer that covers the surface of the wiring body and extends continuously from the stationary contact insulation layer.

[0012] Preferably, the wiring body includes a wiring support plate extending through the stationary contact insulation layer and connected to the support base, and a wiring conductive member disposed on the side of the wiring support plate facing the moving contact assembly and extending through the stationary contact insulation layer and the support base and connected to the stationary contact conductive plate.

[0013] Preferably, the wiring conductive member includes a wiring conductive plate connected to the stationary contact conductive plate and arranged opposite to the wiring support plate, and a wiring conduit extending beyond the wiring support plate from the end of the wiring conductive plate away from the stationary contact conductive plate.

[0014] Preferably, the wiring assembly further includes a pair of wiring fasteners that extend through the wiring insulation layer and the wiring conduit into the interior of the wiring conduit and are arranged at an angle relative to each other.

[0015] Preferably, the wiring assembly further includes a wiring pad detachably disposed inside the end of the wiring fitting away from the wiring conductive plate and disposed opposite to the pair of wiring fasteners.

[0016] Preferably, the moving contact insulation layer has insulating protrusions extending toward the contact seat around the mating surface of the moving contact conductive plate.

[0017] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described in conjunction with the accompanying drawings in the detailed description below. Attached Figure Description

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a perspective view of a fully enclosed disconnector switch in the closed state according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of the fully enclosed disconnector in the closed state according to an embodiment of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of a fully enclosed disconnecting switch in the closed state according to an embodiment of the present invention;

[0022] Figure 4 This is a perspective view of the moving contact assembly of a fully enclosed disconnector according to an embodiment of the present invention;

[0023] Figure 5 This is a perspective view of the contact arm and moving contact of a fully enclosed disconnector according to an embodiment of the present invention;

[0024] Figure 6 This is a bottom view of the contact arm and moving contact of a fully enclosed disconnector according to an embodiment of the present invention;

[0025] Figure 7 This is a perspective view of the stationary contact assembly and wiring assembly of a fully enclosed disconnector according to an embodiment of the present invention;

[0026] Figure 8 This is a perspective view of the contact base and wiring body of a fully enclosed disconnector according to an embodiment of the present utility model;

[0027] Figure 9 This is a top view of the contact base and wiring body of a fully enclosed disconnector according to an embodiment of the present utility model;

[0028] Figure 10 This is a side view of the contact base and wiring body of a fully enclosed disconnector according to an embodiment of the present invention;

[0029] Figure 11 This is a side view of the wiring body of a fully enclosed disconnector according to an embodiment of the present invention;

[0030] Figure 12 This is a perspective view of the fully enclosed disconnecting switch in the open state according to an embodiment of the present utility model;

[0031] Figure 13 This is a front view of the fully enclosed disconnecting switch in the open state according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100 - Fully enclosed disconnector; 10 - Stationary contact assembly; 11 - Contact base; 111 - Support base; 112 - Stationary contact conductive plate; 12 - Stationary contact; 13 - Stationary contact insulation layer; 20 - Moving contact assembly; 21 - Contact arm; 211 - Moving contact conductive plate; 211a - Conductive intermediate section; 211b - Conductive end; 212 - Moving contact support plate; 212a - Support intermediate section; 212b - Support end; 22 - Moving contact; 23 - Moving contact Insulating layer; 231-Insulating protrusion; 30-Connecting assembly; 31-Connecting body; 311-Connecting support plate; 312-Connecting conductive component; 312a-Connecting conductive plate; 312b-Connecting fitting; 32-Connecting insulating layer; 33-Connecting fastener; 34-Connecting gasket; 40-Rotating assembly; 41-Fixing part; 42-Rotating part; 50-Locking assembly; 51-Locking part; 52-Snap-fit ​​part; 60-Supporting base; 70-Supporting insulator. Detailed Implementation

[0034] The schematic scheme of the fully enclosed disconnector disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0035] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0036] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0037] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.) and direct connection of two components without the aid of any intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.).

[0038] Figures 1 to 13The fully enclosed disconnector 100 of this utility model is illustrated by way of example. In this example, the fully enclosed disconnector 100 can... Figures 1 to 3 The closing status shown is the same as Figure 12 and Figure 13 The switch can switch between the open and closed states, and the insulation isolation effect of the fully enclosed disconnector 100 is greatly improved compared with the conventional disconnector, thereby improving the safety and reliability of the fully enclosed disconnector 100 and expanding the application scope of the fully enclosed disconnector 100 in this utility model.

[0039] like Figures 1 to 3 As shown, the fully enclosed disconnector 100 can be configured as a two-column disconnector, which may include a support base 60, two support insulators 70 arranged on the support base 60, two stationary contact assemblies 10 supported by the two support insulators 70 respectively, and a moving contact assembly 20 arranged between the two stationary contact assemblies 10 and rotatable relative to the two stationary contact assemblies 10. In embodiments not shown, the fully enclosed disconnector 100 may also be configured as a single-column disconnector or a three-column disconnector.

[0040] As shown in the figure, the stationary contact assembly 10 may include a contact seat 11 and a stationary contact 12. The contact seat 11 may be constructed as a cylinder having an axially open end adjacent to the moving contact assembly 20, i.e., an upper axially open end, and an axially closed end away from the moving contact assembly 20, i.e., a lower axially closed end, preferably constructed as a cylinder as shown in the figure. The stationary contact 12 may be fixedly mounted to the upper side of the axially closed end of the contact seat 11 inside the contact seat 11 via fasteners such as bolts, and will not extend beyond the contact seat 11 in the axial direction, i.e., vertical direction. This allows the stationary contact 12 to be completely located inside the contact seat 11 when engaged with the moving contact 22, which will be described later. It should be noted that the directions “up,” “down,” “left,” and “right” mentioned herein are secondary. Figure 2 The directions shown are up, down, left, and right.

[0041] The moving contact assembly 20 may include a contact arm 21, two moving contacts 22, and two moving contact insulating layers 23. The contact arm 21 may be transverse to the contact seat 11, i.e., along... Figure 2The left-right direction shown extends from one contact arm 21 to the other contact arm 21 to close the axially open ends of the two contact seats 11 through their left and right ends. The outer surface of the contact arm 21 is thus divided into a mating surface defined by the outer periphery of the axially open end of the contact seat 11 and a surface other than the mating surface. The moving contact 22 can be fixedly mounted to the mating surface of the contact arm 21, for example, via fasteners, and extends toward the interior of the contact seat 11 to engage with the stationary contact 12. As can be seen, the moving contact 22 and the stationary contact 12, which are engaged together, are completely enclosed inside the attached contact arm 21 and contact seat 11, which ensures that the fully enclosed disconnect switch 100 operates safely without interference from insects such as snakes, ants, and rodents when closed.

[0042] Combination Figure 4 As shown, the moving contact 22 can be designed as an adjustable moving contact with adjustable contact pressure. It can be equipped with a bolt for adjusting the contact pressure, so that the contact pressure can be adjusted by adjusting the degree of screwing in the bolt on the side where the contact arm 21 is located, which is convenient to operate.

[0043] Furthermore, combined Figures 4 to 6 As shown, the moving contact insulation layer 23 can at least cover the surface of the contact arm 21 except for the mating surface. This allows the contact arm 21 of the fully enclosed disconnector 100 to be isolated from the surrounding environment in both the closed and open states, thereby minimizing the negative impact of the surrounding environment on the electrical performance of the contact arm 21. Figure 3 As shown, the mating surface on the outer surface of the contact arm 21 is defined by the inner periphery of the contact seat 11. The moving contact 22 covers the surface of the contact arm 21 except for the mating surface. Thus, when the contact arm 21 is attached to the contact seat 11, the contact seat 11 can abut against the moving contact insulation layer 23, which can further improve the insulation and isolation performance of the fully enclosed disconnecting switch 100 of this utility model.

[0044] Importantly, the contact arm 21 may include a moving contact conductive plate 211 and a moving contact support plate 212 stacked along the axial direction of the contact base 11, i.e., in the vertical direction. The moving contact conductive plate 211 is arranged adjacent to the contact base 11, and its side facing the contact base 11, i.e., its lower side, may have a mating surface for mounting the moving contact 22 thereon. The moving contact support plate 212 is located above the moving contact conductive plate 211 and is made of a material with a stiffness greater than that of the moving contact insulation layer 23. On the one hand, the flexibility of the moving contact insulation layer 23 facilitates the installation of the moving contact insulation layer 23 to the contact arm 21 and ensures a tight contact between the contact arm 21 and the contact base 11. On the other hand, the rigidity of the moving contact support plate 212 can be used to enhance the mechanical strength of the moving contact assembly 20 so that the rotating assembly 40 and the locking assembly 50, described later, can be mounted on the moving contact support plate 212.

[0045] Further integration Figures 4 to 6 As shown, the moving contact support plate 212 substantially covers the moving contact conductive plate 211 on a plane perpendicular to the vertical direction. Specifically, the moving contact support plate 212 may include a generally centrally located support intermediate section 212a and two support ends 212b located at both ends of the support intermediate section 212a, the support ends 212b being circular in shape. The moving contact conductive plate 211 may include a generally centrally located conductive intermediate section 211a and two conductive ends 211b located at both ends of the conductive intermediate section 211a. The size of the conductive intermediate section 211a is approximately the same as that of the support intermediate section 212a, and the conductive ends 211b are arranged generally concentrically with the support ends 212b and have a smaller diameter than the support ends 212b, so that the moving contact support plate 212 can provide sufficient support for the moving contact conductive plate 211 and the components subsequently installed on it.

[0046] Optionally, such as Figures 1 to 3 As shown, the stationary contact assembly 10 may further include a stationary contact insulation layer 13. The stationary contact insulation layer 13 substantially covers the surface of the contact seat 11, except for the upper side of the axially closed end of the contact seat 11. Thus, when the contact arm 21 is attached to the contact seat 11, the moving contact insulation layer 23 covering the contact arm 21 abuts against the stationary contact insulation layer 13 covering the contact seat 11, which further improves the sealing between the contact arm 21 and the contact seat 11.

[0047] Preferably, both the moving contact insulation layer 23 and the stationary contact insulation layer 13 can be made of silicone rubber. The anti-aging, corrosion resistance, stain resistance, water repellency and ductility of silicone rubber can be used to further prevent the fully enclosed disconnecting switch 100 of this utility model from being affected by the surrounding environment. In particular, the self-adhesiveness of silicone rubber can be used to enhance the tight fit between the moving contact insulation layer 23 on the contact arm 21 and the stationary contact insulation layer 13 on the contact seat 11.

[0048] Optionally, combined Figure 3 and Figure 4 As shown, the moving contact insulation layer 23 has downwardly protruding insulating protrusions 231 around the mating surface of the moving contact conductive plate 211, so that when the contact arm 21 overlaps with the contact seat 11, the insulating protrusions 231 are tightly fitted to the end face and inner periphery of the axial open end of the contact seat 11, thereby further enhancing the sealing performance of the stationary contact assembly 10 and the moving contact assembly 20.

[0049] Optionally, combined Figures 7 to 9As shown, the contact base 11 may include a support base 111 and a stationary contact conductive plate 112. Both the support base 111 and the moving contact support plate 212 may be made of aluminum. Using aluminum for both the moving contact support plate 212 and the support base 111 avoids potential ferromagnetic effects, reduces cost, facilitates processing, and enhances current conduction capability. The support base 111 may be designed as a cylindrical shape with an axially closed end and an axially open end. The stationary contact conductive plate 112 can be mounted to the upper side of the axially closed end inside the support base 111 via fasteners, and the stationary contact 12 can subsequently be mounted to the upper side of the stationary contact conductive plate 112 via fasteners.

[0050] Furthermore, the fully enclosed disconnector 100 may also include a wiring assembly 30 having a wiring body 31 and a wiring insulation layer 32 to connect the stationary contact assembly 10 to an external cable. The wiring body 31 may extend from the surrounding environment through the sidewalls of the stationary contact insulation layer 13 and the support base 111 into the interior of the support base 111 to connect to the stationary contact conductive plate 112. The end of the wiring body 31 located in the surrounding environment may be connected to an external cable, thereby connecting the moving contact 22, the stationary contact 12, and the wiring body 31 to an external circuit. The wiring insulation layer 32 may be made of the same material as the stationary contact insulation layer 13, namely silicone rubber, to extend from the stationary contact insulation layer 13 and wrap around the wiring body 31.

[0051] In this way, the moving contact conductive plate 211, moving contact 22, stationary contact 12, stationary contact conductive plate 112 and wiring body 31 of the fully enclosed disconnect switch 100 of this utility model are all wrapped with corresponding insulating layers. This can completely wrap the conductive parts of the fully enclosed disconnect switch 100 in the insulating layer, thereby greatly avoiding environmental pollution.

[0052] More specifically, the wiring body 31 may include a wiring support plate 311 and a wiring conductive member 312. The wiring support plate 311 may extend from the surrounding environment through the stationary contact insulation layer 13 and connect to the support base 111, preferably being integrally formed with the support base 111. As shown, the wiring support plate 311 is generally located on both radially opposite sides of the contact arm 21 and extends from the support base 111 generally in a direction parallel to the contact arm 21, preferably extending from the axial closed end of the support base 111.

[0053] Similarly, the wiring conductive member 312 may extend from the surrounding environment through the sidewalls of the stationary contact insulation layer 13 and the support base 111 into the interior of the support base 111 to connect with the stationary contact conductive plate 112, preferably integrally formed with the stationary contact conductive plate 112 and mounted to the integrally formed wiring support plate 311 and support base 111 via fasteners. The wiring conductive member 312 may extend in a generally the same direction as the wiring support plate 311 and be located above the wiring support plate 311 so that it is supported by the wiring support plate 311 and on which the locking assembly 50 and the rotating assembly 40, described later, may be mounted.

[0054] The wiring conductive member 312 may include a wiring conductive plate 312a and a wiring conduit 312b. The wiring conductive plate 312a extends from the stationary contact conductive plate 112 away from the contact arm 21 through the support base 111 and the stationary contact insulation layer 13 until it is substantially aligned with the end side of the wiring support plate 311 away from the support base 111. The wiring conduit 312b may be arranged at the end of the wiring conductive plate 312a away from the contact arm 21 and extends in the same extending direction as the wiring conductive plate 312a for connection to an external cable.

[0055] Optionally, combined Figure 10 As shown, a pair of fasteners 33 may be provided on the wiring conduit 312b. These fasteners 33 extend from the surrounding environment, pass through the wiring insulation layer 32 and the wiring conduit 312b, and enter the interior of the wiring conduit 312b, converging at an angle relative to each other. After an external cable is placed inside the wiring conduit 312b, the external cable is pressed into the wiring conduit 312b by screwing in the fasteners 33. Therefore, the fully enclosed disconnect switch 100 of this invention can achieve connection with external cables without additional mounting parts such as cable lugs.

[0056] For example, the wiring fastener 33 can be a breakable bolt, so that the hexagonal end of the breakable bolt breaks off when the desired torque is reached. The breakable bolt remaining in the wiring conduit 312b will not extend beyond the wiring conduit 312b, which avoids the formation of sharp corners on the surface of the wiring body 31. In an embodiment not shown, after the wiring conduit 312b is connected to an external cable, the circumference of the wiring conduit 312b can be fitted with a sleeve to shield the wiring fastener 33 and insulating tape wrapped around the connection between the sleeve and the wiring conduit 312b, thereby further improving the sealing performance of the fully enclosed disconnect switch 100 of this invention.

[0057] Optionally, combined Figure 10 and Figure 11As shown, the wiring assembly 30 may further include a wiring pad 34. The wiring pad 34 is detachably mounted to the inside of the wiring conduit 312b and extends inside the wiring conduit 312b to be arranged opposite to the wiring fastener 33, so that the wiring conduit 312b provided by this invention can be arranged with varying diameters, thereby further expanding the range of applicable external cable diameters, for example, between 70 square millimeters and 240 square millimeters, and thus expanding the range of rated currents applicable to the fully enclosed disconnector 100 of this invention, for example, between 200 amps and 630 amps. In an embodiment not shown, the angle of the pair of wiring fasteners 33 relative to each other can also be selected as needed to accommodate cables with different diameters used under different rated current specifications.

[0058] like Figure 11 As shown, the curvature of the wiring pad 34 is designed to match the curvature of the inner periphery of the wiring fitting 312b, and the side of the wiring pad 34 facing away from the wiring fastener 33 may be provided with a positioning protrusion. The inner side of the wiring fitting 312b is provided with a positioning groove that matches the positioning protrusion, so as to prevent the wiring pad 34 from rotating undesirably in the wiring fitting 312b through the cooperation of the positioning protrusion and the positioning groove.

[0059] Optionally, such as Figures 1 to 3 as well as Figure 12 and Figure 13 As shown, the fully enclosed disconnector 100 may also include a rotating assembly 40 and a locking assembly 50.

[0060] The rotating assembly 40 may include a fixing portion 41 that is fixed, for example, snapped to a wiring body 31 of one of the wiring assemblies 30, and a rotating portion 42 that is fixed to one end of the contact arm 21 adjacent to the fixing portion 41 and rotatably connected to the fixing portion 41, so that the contact arm 21 can rotate relative to the stationary contact assembly 10 via the cooperation of the rotating portion 42 and the fixing portion 41, thereby achieving engagement and disengagement with the stationary contact 12. The rotating portion 42 may also be designed to include a rotating support member integrally formed with and extending from the moving contact support plate 212, and an insulating layer that surrounds the rotating support member and is integrally formed with the moving contact insulating layer 23.

[0061] The locking assembly 50 may include a locking portion 51 that secures, for example, a wiring body 31 to another wiring assembly 30, and a latching portion 52 that secures to one end of the contact arm 21 adjacent to the locking portion 51. When the fully enclosed disconnect switch 100 is in... Figures 1 to 2In the closed state, the locking part 51 can lock with the latching part 52 to further enhance the connection strength between the contact arm 21 and the stationary contact seat, as well as the fit between the moving contact insulation layer 23 and the stationary contact insulation layer 13. When it is necessary to open the circuit, the latching part 52 can be pulled first to unlock the latching part 52 and the locking part 51, and then the fully enclosed disconnecting switch 100 can be opened by pulling the latching part 52. Figure 12 and Figure 13 The state shown.

[0062] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0063] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A dead tank disconnector (100), characterized in that The fully enclosed disconnect switch (100) includes: A stationary contact assembly (10) includes a cylindrical contact seat (11) configured to have an axially open end and an axially closed end, and a stationary contact (12) fixed inside the contact seat (11) to the axially closed end of the contact seat (11). The moving contact assembly (20) includes a contact arm (21) attached to an axially open end of the contact seat (11) to close the contact seat (11), a moving contact (22) fixed to the contact arm (21) by a mating surface defined by the outer periphery of the axially open end of the contact seat (11) and extending into the contact seat (11) to engage with the stationary contact (12), and a moving contact insulation layer (23) covering at least the surfaces of the contact arm (21) other than the mating surface; The contact arm (21) includes a moving contact conductive plate (211) and a moving contact support plate (212) stacked along the axial direction of the contact seat (11). The moving contact conductive plate (211) is arranged adjacent to the contact seat (11) and has the engagement surface on the surface facing the contact seat (11). The moving contact support plate (212) is located on the side of the moving contact conductive plate (211) facing away from the contact seat (11) and is made of a material with greater stiffness than the moving contact insulation layer (23).

2. The fully enclosed disconnector (100) according to claim 1, characterized in that, The stationary contact assembly (10) further includes at least a stationary contact insulation layer (13) covering the surface of the contact seat (11) except for the side facing the contact arm (21) with the axial closed end, the contact seat (11) being made of a material with greater stiffness than the stationary contact insulation layer (13).

3. The fully enclosed disconnector (100) according to claim 2, characterized in that, The moving contact insulation layer (23) and the stationary contact insulation layer (13) are made of the same insulating material, wherein the moving contact insulation layer (23) and the stationary contact insulation layer (13) are both made of silicone rubber.

4. The fully enclosed disconnector (100) according to claim 2 or 3, characterized in that, The contact seat (11) includes a cylindrical support (111) configured to have an axially open end and an axially closed end, and a stationary contact conductive plate (112) fixed inside the support (111) to the axially closed end of the support (111). The stationary contact (12) is fixedly installed on the side of the stationary contact conductive plate (112) facing the contact arm (21).

5. The fully enclosed disconnector (100) according to claim 4, characterized in that, The fully enclosed disconnector (100) further includes a wiring assembly (30) for connecting the stationary contact assembly (10) to an external cable, wherein the wiring assembly (30) includes a wiring body (31) extending through the stationary contact insulation layer (13) and the support base (111) to the stationary contact conductive plate (112), and a wiring insulation layer (32) covering the surface of the wiring body (31) and extending continuously from the stationary contact insulation layer (13).

6. The fully enclosed disconnector (100) according to claim 5, characterized in that, The wiring body (31) includes a wiring support plate (311) extending through the stationary contact insulation layer (13) and connected to the support base (111), and a wiring conductive member (312) arranged on the side of the wiring support plate (311) facing the moving contact assembly (20) and extending through the stationary contact insulation layer (13) and the support base (111) and connected to the stationary contact conductive plate (112).

7. The fully enclosed disconnector (100) according to claim 6, characterized in that, The wiring conductive member (312) includes a wiring conductive plate (312a) connected to the stationary contact conductive plate (112) and arranged opposite to the wiring support plate (311), and a wiring tube (312b) extending beyond the wiring support plate (311) from the end of the wiring conductive plate (312a) away from the stationary contact conductive plate (112).

8. The fully enclosed disconnector (100) according to claim 7, characterized in that, The wiring assembly (30) further includes a pair of wiring fasteners (33) that extend through the wiring insulation layer (32) and the wiring conduit (312b) into the interior of the wiring conduit (312b) and are arranged at an angle relative to each other.

9. The fully enclosed disconnector (100) according to claim 8, characterized in that, The wiring assembly (30) further includes a wiring pad (34) detachably disposed on the inner side of the end of the wiring fitting (312b) away from the wiring conductive plate (312a) and disposed opposite to the pair of wiring fasteners (33).

10. The fully enclosed disconnector (100) according to claim 2 or 3, characterized in that, The moving contact insulation layer (23) has an insulating protrusion (231) extending toward the contact seat (11) around the mating surface of the moving contact conductive plate (211).

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