Detachable contact assemblies and switching devices

Abstract

This application discloses a detachable contact assembly and a switchgear. The detachable contact assembly includes a moving contact assembly comprising a moving main contact and a moving arc contact spaced apart and located on the same side, the moving contact assembly being rotatably mounted; and a stationary contact assembly comprising a mounting bracket, an isolator, a contact structure, and an equipotential bonding member. The mounting bracket and the contact structure are insulated from each other by the isolator. The equipotential bonding member is sequentially passed through and detachably connected to the mounting bracket, the isolator, and the contact structure. The mounting bracket and the contact structure are also electrically connected by the equipotential bonding member. The mounting bracket has a stationary main contact protruding towards the moving main contact, and the contact structure has a stationary arc contact protruding towards the moving arc contact. The detachable contact assembly and switchgear of this application aim to improve the ease of measuring and replacing the time difference between the initial and subsequent opening of the contact assembly, thereby reducing the maintenance time and cost of the switchgear.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a detachable contact assembly and a switching device. Background Technology

[0002] In traditional switching devices, the contact system, as the main switching device, usually has main electrical contacts and arc contacts. The arc contacts are connected before the main electrical contacts during the closing process and are connected after the main electrical contacts during the opening process, so that the arc is generated at the arc contacts, which improves the arc extinguishing effect and protects the main electrical contacts.

[0003] However, because the stationary arc contact bears most of the electric arc, it is susceptible to arc erosion, resulting in damage and thinning. If it is not replaced for a long time, it will lead to a decrease in the overall switching performance of the switchgear and failure of the arc contact's function of closing before opening relative to the main contact. Currently, the contact system is usually a single unit. To replace the stationary arc contact or measure the time difference between the arc contact's closing and opening, the entire contact system is usually removed from the circuit breaker and replaced or measured as a whole. This method not only increases the maintenance time of the switchgear but also increases the overall maintenance cost. Utility Model Content

[0004] This application provides a detachable contact assembly and a switching device, which aims to improve the convenience of measuring and replacing the contact assembly, thereby reducing the maintenance time and cost of the switching device.

[0005] This application provides a detachable contact assembly, comprising a moving contact assembly including a moving main contact and a moving arc contact spaced apart and located on the same side, the moving contact assembly being rotatably mounted; and a stationary contact assembly including a mounting bracket, an isolator, a contact structure, and an equipotential bonding member, the mounting bracket and the contact structure being insulated from each other by the isolator, the equipotential bonding member being sequentially passed through and detachably connected to the mounting bracket, the isolator, and the contact structure, the mounting bracket and the contact structure also being electrically connected by the equipotential bonding member, the mounting bracket having a stationary main contact protruding toward the moving main contact, and the contact structure having a stationary arc contact protruding toward the moving arc contact.

[0006] The detachable contact assembly described above includes a contact structure comprising a bent mounting portion and an arc contact head. The mounting portion is movably mounted on a mounting bracket and an isolator. The arc contact head, isolator, and mounting bracket are stacked sequentially and connected by an equipotential bonding member. The static arc contact is located on the side of the arc contact head facing away from the isolator.

[0007] The detachable contact assembly described above includes a mounting section comprising a bent-connected fixed mounting plate and a through mounting plate. One end of the through mounting plate is connected to the arc contact head, and the other end is connected to the fixed mounting plate. The fixed mounting plate has a first fixing hole, through which the fixed mounting plate is fixedly installed on the fixed base.

[0008] In the above detachable contact assembly, the fixed mounting plate is arranged parallel to the arc contact head, and the fixed mounting plate and the arc contact head extend from the two ends of the mounting plate in opposite directions.

[0009] The detachable contact assembly described above includes a mounting bracket comprising a bracket body and a main contact head protruding from the bracket body. The bracket body has a first mounting hole for through which the contact structure passes. The first mounting hole is spaced apart from the main contact head at the connection position of the bracket body. The stationary main contact is located on the side of the main contact head opposite to the first mounting hole.

[0010] In the above-mentioned detachable contact assembly, the bracket body includes a bracket back plate and a bracket connecting part that are bent and connected. A first mounting hole is opened in the bracket back plate. The main contact head is connected to the end of the bracket connecting part away from the bracket back plate. The bracket back plate, the bracket connecting part and the main contact head enclose and form an installation space. The isolation member and the contact structure are detachably installed in the installation space.

[0011] In the above-described detachable contact assembly, the isolator has a second mounting hole, which is positioned opposite to the first mounting hole, and the through-hole areas of both the second and first mounting holes are larger than the cross-sectional area of ​​the mounting plate perpendicular to its extension direction.

[0012] In the above-mentioned detachable contact assembly, the isolator is plate-shaped and includes an isolator body and isolator mounting parts and isolator support connected to both ends of the isolator body. A second mounting hole is opened in the isolator body. The isolator mounting parts are detachably connected to the equipotential bonding member. The thickness of the isolator support is greater than the thickness of the isolator body and the isolator mounting parts, so as to be snapped into the mounting space of the isolator.

[0013] On the other hand, this application also provides a switching device, which includes the above-mentioned detachable contact assembly. The switching device also includes a housing assembly, including a detachably connected housing base, housing cover and housing bottom plate. The contact assembly is installed between the housing base and the housing cover. The moving contact assembly is located on the side closer to the housing cover, and the stationary contact assembly is located on the side closer to the housing base. The housing base has a through-hole inspection port and a sealing plate detachably installed at the inspection port. The stationary contact assembly is positioned opposite to the inspection port, and at least a portion of the mounting bracket and at least a portion of the contact structure are within the opening range of the inspection port.

[0014] The switch and electrical appliance described above also has a fixing part in the housing base. The fixing part is located inside the inspection port and is spaced apart from the mounting bracket. The fixing part has a second fixing hole. At least part of the contact structure is detachably connected to the fixing part through the second fixing hole.

[0015] The detachable contact assembly of this application includes a moving contact assembly and a stationary contact assembly. The moving contact assembly includes a moving main contact and a moving arc contact spaced apart and located on the same side, which respectively contact or separate from the stationary main contact and the stationary arc contact of the stationary contact assembly, which are located on the mounting bracket and on the contact structure, to realize the closing and opening operations of the contact assembly. The stationary contact assembly includes a mounting bracket, an isolator, a contact structure, and an equipotential bonding member. The mounting bracket, isolator, and contact structure are detachably connected through the equipotential bonding member to facilitate the disassembly of the contact structure for maintenance or replacement when the stationary arc contact is severely eroded or damaged. Furthermore, the mounting bracket and the contact structure are electrically connected via an equipotential bonding element. When measuring the closing and opening time difference of the contact assembly, only the equipotential bonding element needs to be removed. This allows for insulation isolation between the mounting bracket and the contact structure via an isolator, enabling separate measurements of the closing and opening times between the moving and stationary main contacts and between the moving and stationary arc contacts. This allows for determination of whether the time difference meets the performance requirements of the switchgear, improving the convenience of time difference measurement. Therefore, the detachable contact assembly of this application improves the convenience of contact assembly measurement and replacement, reducing the maintenance time and cost of the switchgear. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the switching device according to an embodiment of this application;

[0018] Figure 2 This is an assembly diagram of the stationary contact assembly of the detachable contact assembly according to an embodiment of this application;

[0019] Figure 3 This is an exploded view of the stationary contact assembly of the detachable contact assembly according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the installation of the stationary contact assembly and the housing base of the switching device according to an embodiment of this application;

[0021] Figure 5 This is a measurement circuit diagram of a detachable contact assembly according to an embodiment of this application.

[0022] Explanation of icon numbers:

[0023] 1. Moving contact assembly; 1a. Moving main contact; 1b. Moving arc contact;

[0024] 2. Stationary contact assembly; 2a. Stationary main contact; 2b. Stationary arc contact; 21. Mounting bracket; 211. Bracket body; 2111. Bracket back plate; 2112. Bracket connection part; 211a. First mounting hole; 211b. Mounting space; 212. Main contact head; 22. Isolator; 221. Isolator body; 222. Isolator mounting part; 223. Isolator support; 22a. Second mounting hole; 23. Contact structure; 231. Mounting part; 2311. Fixed mounting plate; 2311a. First fixed hole; 2312. Through mounting plate; 232. Arc contact head; 24. Equipotential bonding element;

[0025] 3. Casing assembly; 31. Casing base; 311. Inspection port; 312. Gas sealing plate; 313. Fixing part; 313a. Second fixing hole; 32. Casing face shield; 33. Casing bottom plate. Detailed Implementation

[0026] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0027] like Figures 1 to 5 As shown, this application embodiment provides a detachable contact assembly, which includes a moving contact assembly 1, including a moving main contact 1a and a moving arc contact 1b spaced apart and located on the same side, the moving contact assembly 1 being rotatably disposed; and a stationary contact assembly 2, including a mounting bracket 21, an isolator 22, a contact structure 23, and an equipotential bonding member 24, the mounting bracket 21 and the contact structure 23 being insulated and isolated by the isolator 22, the equipotential bonding member 24 being sequentially passed through and detachably connected to the mounting bracket 21, the isolator 22, and the contact structure 23, the mounting bracket 21 and the contact structure 23 being electrically connected by the equipotential bonding member 24, the mounting bracket 21 having a stationary main contact 2a protruding toward the moving main contact 1a, and the contact structure 23 having a stationary arc contact 2b protruding toward the moving arc contact 1b.

[0028] In practical implementation, the detachable contact assembly of this application includes a moving contact assembly 1 and a stationary contact assembly 2. The moving contact assembly 1 includes a moving main contact 1a and a moving arc contact 1b spaced apart and located on the same side, which respectively contact or separate from the stationary main contact 2a located on the mounting bracket 21 and the stationary arc contact 2b located on the contact structure 23 of the stationary contact assembly, thereby realizing the closing and opening operations of the contact assembly. When the moving main contact 1a and the stationary main contact 2a, as well as the moving arc contact 1b and the stationary arc contact 2b, are in complete contact, the contact assembly is closed, and current can be conducted through the contact assembly; when the moving main contact 1a and the stationary main contact 2a, as well as the moving arc contact 1b and the stationary arc contact 2b, are completely separated, the contact assembly is opened, and current cannot pass through the contact assembly.

[0029] The stationary contact assembly 2 includes a mounting bracket 21, an isolator 22, a contact structure 23, and an equipotential bonding member 24. The mounting bracket 21, the isolator 22, and the contact structure 23 are detachably connected through the equipotential bonding member 24, so that the contact structure 23 can be disassembled for maintenance or replacement when the stationary arc contact 2b is severely ablated. Furthermore, the mounting bracket 21 and the contact structure 23 are electrically connected through an equipotential bonding member 24. When measuring the closing and opening time difference of the contact assembly, only the equipotential bonding member 24 needs to be removed. This allows the mounting bracket 21 and the contact structure 23 to be insulated from each other through the isolator 22. This enables separate measurements of the closing and opening times between the moving main contact 1a and the stationary main contact 2a, and between the moving arc contact 1b and the stationary arc contact 2b. This allows for the determination of whether the time difference meets the performance requirements of the switching device, i.e., whether the moving arc contact 1b and the stationary arc contact 2b close before the moving main contact 1a and the stationary main contact 2a, and whether they open after the moving main contact 1a and the stationary main contact 2a. This measurement method does not require complete disassembly of the stationary contact assembly 2, improving the convenience of measuring the time difference.

[0030] Therefore, the detachable contact assembly of this application improves the detection speed and replacement convenience of the contact assembly, and reduces the maintenance time and maintenance cost of the switching device.

[0031] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly includes a contact structure 23 comprising a bent mounting portion 231 and an arc contact head 232. The mounting portion 231 is movably disposed within a mounting bracket 21 and an isolator 22. The arc contact head 232, the isolator 22, and the mounting bracket 21 are stacked sequentially and connected by an equipotential bonding member 24. The static arc contact 2b is located on the side of the arc contact head 232 facing away from the isolator 22.

[0032] In practice, when installing or disassembling the contact structure 23, the mounting part 231 that is movably inserted through the mounting bracket 21 and the isolator 22 can be moved so as to install the arc contact head 232 in the stacked fixed position or to disassemble it as a whole.

[0033] When the arc contact head 232 of the contact structure 23 is installed in the stacked fixed position, the arc contact head 232, the isolator 22, and the mounting bracket 21 can be stacked sequentially. The bent connection of the mounting part 231 and the arc contact head 232 ensures the installation stability of the contact structure 23. The equipotential bonding member 24 is sequentially inserted to achieve mechanical connection and conductive connection between the arc contact head 232 and the mounting bracket 21. This stacked structure facilitates the disassembly and installation of the equipotential bonding member 24, improving the overall measurement and replacement convenience of the contact assembly. Furthermore, the stationary arc contact 2b is located on the side of the arc contact head 232 facing away from the isolator 22. During its relative movement and contact with the moving arc contact 1b, it will not be interfered with by the isolator 22 and the mounting bracket 21, ensuring the stability of the contact assembly's opening and closing.

[0034] When the arc contact head 232 of the contact structure 23 is disassembled, since the mounting part 231 and the arc contact head 232 are bent and connected, when the mounting part 231 is completely separated from the mounting bracket 21 and the isolator 22, the contact structure 23 can be rotated as a whole so that the arc contact head 232 can slide relative to the isolator 22 and the mounting bracket 21, and finally the contact structure 23 can be completely separated from the isolator 22 and the mounting bracket 21, thereby realizing the disassembly of the contact structure 23 for the next step of replacement or repair.

[0035] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly includes a mounting portion 231 comprising a bent and connected fixed mounting plate 2311 and a through mounting plate 2312. One end of the through mounting plate 2312 is connected to the arc contact head 232 in its extension direction, and the other end is connected to the fixed mounting plate 2311. The fixed mounting plate 2311 has a first fixing hole 2311a, and the fixed mounting plate 2311 is fixedly installed on the fixed base through the first fixing hole 2311a.

[0036] In specific implementation, the two ends of the through mounting plate 2312 of the mounting part 231 are connected to the fixed mounting plate 2311 and the arc contact head 232 respectively. When the arc contact head 232 of the contact structure 23 is installed in the stacked fixed position, the arc contact head 232 and the fixed mounting plate 2311 are respectively located on the opposite sides of the mounting bracket 21 and the isolation member 22. The two sandwich the mounting bracket 21 and the isolation member 22 in the middle, which improves the stability of the cooperation between the contact structure 23 and the mounting bracket 21 and the isolation member 22.

[0037] The mounting plate 2311 has a first fixing hole 2311a. The mounting plate 2311 is also fixedly installed on the fixing base of the switchgear through the first fixing hole 2311a, so that the contact structure 23 can be fixed at two points through the bolt structure at the first fixing hole 2311a and the equipotential bonding member 24. This further improves the fixing stability of the contact structure 23 and prevents the contact structure 23 from rotating around one of the fixing points. This ensures that the static arc contact 2b of the contact structure 23 can be in a stable position and achieve stable closing with the moving arc contact 1b.

[0038] It should be noted that the first fixing hole 2311a of the fixed mounting plate 2311 is provided with a bolt structure. The bolt structure can be connected to the housing base 31 of the switchgear. It is not connected to the mounting bracket 21 to avoid making a conductive connection with the mounting bracket 21 at this point, which would affect the accuracy of the detection.

[0039] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly has a fixed mounting plate 2311 and an arc contact head 232 arranged parallel to each other, and the fixed mounting plate 2311 and the arc contact head 232 extend from the two ends of the mounting plate 2312 in opposite directions.

[0040] In practice, the mounting plate 2311 is set parallel to the arc contact head 232. After the mounting plate 2311 is fixed, the arc contact head 232 can be kept parallel to the mounting bracket 21 and the isolator 22, which facilitates the stacking of the three, so that the equipotential bonding member 24 can connect and fix the three in a more stable and convenient manner.

[0041] The fixed mounting plate 2311 and the arc contact head 232 are respectively extended from both ends of the mounting plate 2312 in opposite directions. In this way, when the contact structure 23 is disassembled, as the mounting plate 2312 is detached from the mounting bracket 21 and the isolator 22 and the contact structure 23 is rotated so that the arc contact head 232 is parallel to the stacking direction of the mounting bracket 21 and the isolator 22, the fixed mounting plate 2311 will not come into contact with the fixed base or the mounting bracket 21, thus not interfering with the rotation of the contact structure 23, thereby improving the convenience of disassembling the contact structure 23.

[0042] Specifically, the mounting plate 2311 has at least two spaced first fixing holes 2311a, which further improves the fixing stability of the contact structure 23.

[0043] like Figure 2 and Figure 3As shown in the embodiment of this application, the detachable contact assembly includes a mounting bracket 21 comprising a bracket body 211 and a main contact head 212 protruding from the bracket body 211. The bracket body 211 has a first mounting hole 211a for through which the contact structure 23 passes. The first mounting hole 211a is spaced apart from the opening position of the bracket body 211 and the connection position of the main contact head 212 on the bracket body 211. The stationary main contact 2a is located on the side of the main contact head 212 opposite to the first mounting hole 211a.

[0044] In specific implementation, the bracket body 211 has a first mounting hole 211a, through which the contact structure 23 can pass. With the contact structure 23 fixed, the mounting plate 2312 of the contact structure 23 is positioned within the first mounting hole 211a, and the arc-shaped contact head 232 is stacked with the mounting bracket 21 and the spacer 22. The first mounting hole 211a provides space for the insertion and fixation of the contact structure 23, enabling stable fixation between the contact structure 23 and the bracket body 211.

[0045] The first mounting hole 211a is spaced apart from the main contact head 212 in the bracket body 211. This avoids interference between the contact structure 23 and the main contact head 212 during installation in the first mounting hole 211a, which would affect the installation operation of the contact structure 23. Furthermore, it prevents the static arc contact 2b on the contact structure 23 from coinciding with the static main contact 2a on the side of the main contact head 212 facing away from the first mounting hole 211a after installation. This allows the contact assembly to open and close at different positions of the static arc contact 2b and the static main contact 2a, ensuring the overall stability of the contact assembly's opening and closing.

[0046] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly includes a bracket body 211 comprising a bent bracket back plate 2111 and a bracket connecting portion 2112. A first mounting hole 211a is formed in the bracket back plate 2111. The main contact head 212 is connected to the end of the bracket connecting portion 2112 away from the bracket back plate 2111. The bracket back plate 2111, the bracket connecting portion 2112, and the main contact head 212 enclose a mounting space 211b. The isolation member 22 and the contact structure 23 are detachably installed in the mounting space 211b.

[0047] In specific implementation, the bracket back plate 2111 and the bracket connecting part 2112 are bent together, and the other end of the bracket connecting part 2112 is bent together with the main contact head 212. Therefore, the bracket back plate 2111, the bracket connecting part 2112 and the main contact head 212 can enclose and form an installation space 211b with an opening, providing space for the installation of the isolator 22 and the contact structure 23. After the isolator 22 and the contact structure 23 are fixedly installed, different sides of the isolator 22 can respectively abut against the bracket back plate 2111, the bracket connecting part 2112 and the main contact head 212, thereby realizing the stable installation of the isolator 22 and the contact structure 23, and thus ensuring the overall stability of the contact assembly in opening and closing.

[0048] In some alternative embodiments, the bracket body 211 is generally plate-shaped, the main contact head 212 protrudes from the surface of the plate-shaped bracket body 211, and the isolation member 22 is fixedly connected to the plate-shaped bracket body 211 by bolts or other fixing connectors and equipotential bonding member 24, which can ensure the stable installation effect of the isolation member 22 and the contact structure 23.

[0049] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly has a second mounting hole 22a. The second mounting hole 22a is positioned opposite to the first mounting hole 211a, and the through-hole areas of both the second mounting hole 22a and the first mounting hole 211a are larger than the cross-sectional area of ​​the mounting plate 2312 perpendicular to its extension direction.

[0050] In specific implementation, the second mounting hole 22a is positioned opposite to the first mounting hole 211a, and the contact structure 23 can be installed by sequentially passing through the first mounting hole 211a and the second mounting hole 22a. With the contact structure 23 fixed, the mounting plate 2312 of the contact structure 23 is located within the first mounting hole 211a and the second mounting hole 22a, while the arc-shaped contact head 232 is stacked with the mounting bracket 21 and the spacer 22. The opening of the second mounting hole 22a provides space for the insertion and fixation of the contact structure 23, enabling stable fixation between the contact structure 23, the bracket body 211, and the spacer 22.

[0051] The through-hole areas of the second mounting hole 22a and the first mounting hole 211a are both larger than the cross-sectional area of ​​the through mounting plate 2312 perpendicular to its extension direction. When the through mounting plate 2312 is inserted into or rotated in the second mounting hole 22a and the first mounting hole 211a, it can move freely, reducing the difficulty of installing and disassembling the contact structure 23.

[0052] Specifically, the through-hole areas of the second mounting hole 22a and the first mounting hole 211a are larger than the cross-sectional area of ​​the arc contact head 232 perpendicular to its own extension direction, which ensures that the arc contact head 232 can move freely in the second mounting hole 22a and the first mounting hole 211a, further reducing the difficulty of installing and disassembling the contact structure 23.

[0053] like Figure 2 and Figure 3 As shown in the embodiment of this application, the detachable contact assembly has an isolator 22 that is generally plate-shaped. The isolator 22 includes an isolator body 221 and an isolator mounting portion 222 and an isolator support 223 connected to both ends of the isolator body 221. A second mounting hole 22a is formed in the isolator body 221. The isolator mounting portion 222 is detachably connected to the equipotential bonding member 24. The thickness of the isolator support 223 is greater than the thickness of the isolator body 221 and the isolator mounting portion 222, so that it can be snapped into the mounting space 211b of the isolator 22.

[0054] In practice, the isolation mounting portion 222 of the isolation member 22 is provided at intervals with the second mounting hole 22a opened in the isolation body 221, thereby avoiding interference between the equipotential bonding member 24 and the through mounting plate 2312 passing through the second mounting hole 22a when connected to the isolation mounting portion 222, and ensuring the installation stability of the contact structure 23.

[0055] Furthermore, the thickness of the isolation support 223 is greater than the thickness of the isolation body 221 and the isolation mounting part 222, so that it has sufficient thickness to be snapped into the mounting space 211b between the bracket body 211 and the main contact head 212. This further improves the installation stability of the isolation component 22 and prevents the contact structure 23 from entering the mounting space 211b and coming into contact with the mounting bracket 21, thus avoiding direct conductive connection. This allows the isolation component 22 to achieve a stable isolation effect on the mounting bracket 21 and the contact structure 23, thereby improving the detection accuracy of the contact assembly.

[0056] Specifically, the equipotential bonding member 24 is configured as a bolt structure, and the isolation mounting part 222 has a screw hole that mates with the equipotential bonding member 24. When the equipotential bonding member 24 is in its fixed position, it can be threaded into the screw hole of the isolation mounting part 222. The mounting bracket 21 also has a screw hole opposite to the position of the isolation mounting part 222 and is threaded into the equipotential bonding member 24 to ensure the stability of the fixed installation of the equipotential bonding member 24.

[0057] like Figure 1 and Figure 4As shown in the embodiment of this application, a switching device is also provided, which includes the above-mentioned detachable contact assembly. The switching device also includes a housing assembly 3, which includes a detachably connected housing base 31, a housing cover 32, and a housing bottom plate 33. The contact assembly is installed between the housing base 31 and the housing cover 32. The moving contact assembly 1 is located on the side closer to the housing cover 32, and the stationary contact assembly 2 is located on the side closer to the housing base 31. The housing base 31 has a through-hole inspection port 311 and a sealing plate 312 detachably installed at the inspection port 311. The stationary contact assembly 2 and the inspection port 311 are positioned opposite each other, and at least a portion of the mounting bracket 21 and at least a portion of the contact structure 23 are both within the opening range of the inspection port 311.

[0058] In practice, the housing base 31, housing cover 32, and housing bottom plate 33 are all detachably connected, allowing for targeted maintenance of different parts of the housing assembly 3. When inspection or maintenance of the stationary contact assembly 2 is required, the sealing plates 312 of the housing bottom plate 33 and housing base 31 can be disassembled sequentially to expose the inspection port 311. Then, the equipotential bonding member 24 and contact structure 23 can be disassembled at the inspection port 311. When inspection is required, such as... Figure 4 and Figure 5 As shown, only the equipotential bonding member 24 needs to be disassembled to disconnect the stationary main contact 2a and the stationary arc contact 2b. Since at least a portion of the mounting bracket 21 and at least a portion of the contact structure 23 are within the opening of the inspection port 311, an external oscilloscope can be used to measure the mounting bracket 21 containing the stationary main contact 2a and the contact structure 23 containing the stationary arc contact 2b, respectively, enabling separate measurements of the main contact opening and closing times and the arc contact opening and closing times. When maintenance is required, both the equipotential bonding member 24 and the contact structure 23 must be disassembled together to remove the contact structure 23 from the inspection port 311 for maintenance or replacement. Therefore, the switchgear of this embodiment facilitates the inspection or maintenance of the stationary contact assembly 2, reducing the overall maintenance time and cost of the switchgear.

[0059] like Figure 1 and Figure 4 As shown in the embodiment of the present application, the switch appliance has a housing base 31 with a fixing part 313. The fixing part 313 is disposed in the inspection port 311 and spaced apart from the mounting bracket 21. The fixing part 313 has a second fixing hole 313a. At least part of the contact structure 23 is detachably connected to the fixing part 313 through the second fixing hole 313a.

[0060] In specific implementation, the fixing part 313 is fixed in the inspection port 311 of the housing base 31, serving as the fixing base for the fixing mounting plate 2311 of the contact structure 23. The bolt structure can be sequentially inserted into the second fixing hole 313a and the first fixing hole 2311a of the fixing mounting plate 2311, thereby realizing the fixing between the contact structure 23 and the housing base 31, further improving the fixing stability of the contact structure 23.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A detachable contact assembly, characterized by, include: The moving contact assembly (1) includes a moving main contact (1a) and a moving arc contact (1b) spaced apart and located on the same side, and the moving contact assembly (1) is rotatably disposed. The stationary contact assembly (2) includes a mounting bracket (21), an isolator (22), a contact structure (23), and an equipotential bonding member (24). The mounting bracket (21) and the contact structure (23) are insulated from each other by the isolator (22). The equipotential bonding member (24) is sequentially inserted and detachably connected to the mounting bracket (21), the isolator (22), and the contact structure (23). The mounting bracket (21) and the contact structure (23) are also electrically connected by the equipotential bonding member (24). The mounting bracket (21) is provided with a stationary main contact (2a) protruding toward the moving main contact (1a). The contact structure (23) is provided with a stationary arc contact (2b) protruding toward the moving arc contact (1b).

2. The detachable contact assembly of claim 1, wherein, The contact structure (23) includes a bent mounting part (231) and an arc contact head (232). The mounting part (231) is movably inserted through the mounting bracket (21) and the isolator (22). The arc contact head (232), the isolator (22) and the mounting bracket (21) are stacked in sequence and connected by the equipotential connector (24). The static arc contact (2b) is located on the side of the arc contact head (232) facing away from the isolator (22).

3. The detachable contact assembly of claim 2, wherein, The mounting part (231) includes a fixed mounting plate (2311) and a through mounting plate (2312) connected by bending. One end of the through mounting plate (2312) is connected to the arc contact head (232) in its extension direction, and the other end is connected to the fixed mounting plate (2311). The fixed mounting plate (2311) has a first fixing hole (2311a). The fixed mounting plate (2311) is fixedly installed on the fixed foundation through the first fixing hole (2311a).

4. The detachable contact assembly of claim 3, wherein, The fixed mounting plate (2311) is arranged parallel to the arc contact head (232), and the fixed mounting plate (2311) and the arc contact head (232) extend from the two ends of the through mounting plate (2312) in opposite directions.

5. The detachable contact assembly of claim 3, wherein, The mounting bracket (21) includes a bracket body (211) and a main contact head (212) protruding from the bracket body (211). The bracket body (211) has a first mounting hole (211a) for the contact structure (23) to pass through. The first mounting hole (211a) is spaced apart from the opening position of the bracket body (211) and the main contact head (212) is connected to the bracket body (211). The stationary main contact (2a) is located on the side of the main contact head (212) facing away from the first mounting hole (211a).

6. The detachable contact assembly of claim 5, wherein, The bracket body (211) includes a bracket back plate (2111) and a bracket connecting part (2112) connected by bending. The first mounting hole (211a) is opened in the bracket back plate (2111). The main contact head (212) is connected to the end of the bracket connecting part (2112) away from the bracket back plate (2111). The bracket back plate (2111), the bracket connecting part (2112) and the main contact head (212) enclose and form an installation space (211b). The isolation member (22) and the contact structure (23) are detachably installed in the installation space (211b).

7. The detachable contact assembly of claim 6, wherein, The isolation member (22) has a second mounting hole (22a), which is positioned opposite to the first mounting hole (211a), and the through-hole areas of the second mounting hole (22a) and the first mounting hole (211a) are both greater than the cross-sectional area of ​​the through mounting plate (2312) perpendicular to its extension direction.

8. The detachable contact assembly of claim 7, wherein, The isolation component (22) has a plate-like structure. The isolation component (22) includes an isolation body (221) and an isolation mounting part (222) and an isolation support base (223) connected to both ends of the isolation body (221). The second mounting hole (22a) is opened in the isolation body (221). The isolation mounting part (222) is detachably connected to the equipotential bonding member (24). The thickness of the isolation support base (223) is greater than the thickness of the isolation body (221) and the isolation mounting part (222) so as to be snapped into the mounting space (211b) of the isolation component (22).

9. A switchgear, characterized by The switching device, comprising the detachable contact assembly as described in any one of claims 1 to 8, further comprises: The housing assembly (3) includes a detachably connected housing base (31), a housing face shield (32), and a housing bottom plate (33). The contact assembly is installed between the housing base (31) and the housing face shield (32). The moving contact assembly (1) is located on the side closer to the housing face shield (32), and the stationary contact assembly (2) is located on the side closer to the housing base (31). The housing base (31) has a through-hole inspection port (311) and a sealing plate (312) detachably installed at the inspection port (311). The stationary contact assembly (2) is positioned opposite to the inspection port (311), and at least a portion of the mounting bracket (21) and at least a portion of the contact structure (23) are both within the opening range of the inspection port (311).

10. The switchgear according to claim 9, characterized in that, The housing base (31) also has a fixing part (313), which is located in the inspection port (311) and spaced apart from the mounting bracket (21). The fixing part (313) has a second fixing hole (313a), and at least a portion of the contact structure (23) is detachably connected to the fixing part (313) through the second fixing hole (313a).

Images