A high current multi-contact plug-in disconnector contact module

Abstract

The utility model relates to a low -voltage electric appliance technical field, a kind of high current multi-contact plug-in type isolating switch contact module, comprising: moving contact subassembly, moving contact subassembly includes contact support, and the both sides of contact support are equipped with several moving contact head, and moving contact head includes two moving contact sheet, and gap exists between two moving contact sheet;Two static contact subassemblies, respectively set in the left and right sides of moving contact subassembly, and structure is centrosymmetric, and static contact subassembly includes static contact sheet, and several static contact head is equipped in the side of static contact sheet close to moving contact subassembly, and the position of static contact head corresponds with moving contact head. The utility model when using, several moving contact head and several static contact head can form multiple contact points when closing, and multiple contact points can disperse short-circuit current when load side short-circuit, reduce the heat accumulated on each contact point, thus can avoid contact head adhesion, protect switch from damage.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a high-current multi-contact plug-in disconnector contact module. Background Technology

[0002] A disconnecting switch is a high-voltage or low-voltage switching device used to isolate power sources in a circuit. Its main function is to disconnect the circuit, forming a clearly visible disconnect point to ensure electrical safety during maintenance or repair. Most high-current disconnecting switches on the market today are single-contact. The working principle of a single-contact disconnecting switch is based on the opening and closing action of the moving contact and the stationary contact.

[0003] The shortcomings of the existing technology are that when there is a short circuit fault on the load side and a fault current flows through it, the fault current is concentrated on a single point, which will generate high temperature. High temperature is not only not conducive to the long-term operation of the switch, but also melts the contacts, causing the two contacts to stick together and making it impossible to open the circuit. This results in the overall damage of the switch, and a new switch must be replaced for it to operate normally. Utility Model Content

[0004] The purpose of this utility model is to provide a high-current multi-contact plug-in disconnector contact module. When the switch is closed, several moving contacts and several stationary contacts can form multiple contacts. When the load side is short-circuited, the multiple contacts can disperse the short-circuit current and reduce the heat accumulated on each contact. Therefore, it can prevent the contacts from sticking together and protect the switch from damage.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a high-current multi-contact plug-in disconnector contact module, comprising: a moving contact assembly, the moving contact assembly including a contact support member, with a plurality of moving contact heads on both sides of the contact support member, each moving contact head including two moving contact pieces with a gap between the two moving contact pieces; and two stationary contact assemblies, respectively disposed on the left and right sides of the moving contact assembly, and having a centrally symmetrical structure, each stationary contact assembly including a stationary contact piece, with a plurality of stationary contacts on the side of the stationary contact piece closer to the moving contact assembly, the stationary contacts corresponding to the positions of the moving contact heads.

[0006] Preferably, it further includes two arc-extinguishing components, which are respectively disposed on the upper and lower sides of the moving contact component and are centrally symmetrical in structure. Each arc-extinguishing component includes two fixing plates and a plurality of arc-extinguishing grid plates are disposed between the two fixing plates.

[0007] Preferably, the fixing plate is an arc-shaped plate, and the arc-extinguishing grids are radially distributed with gaps between adjacent arc-extinguishing grids.

[0008] Preferably, the static contact assembly further includes an arc contact, which is disposed at one end of any of the static contacts near the arc-extinguishing grid plate. The arc-extinguishing assembly also includes an arc-inducing angle, which is connected to the outermost arc-extinguishing grid plate and corresponds to the position of the arc contact.

[0009] Preferably, the arc-extinguishing grid plate has a recess and a protrusion on the side near the static contact assembly, and the recess on any one of the arc-extinguishing grid plates corresponds to the position of the protrusion on the adjacent arc-extinguishing grid plate.

[0010] Preferably, the side wall of the contact support is provided with an assembly groove, the moving contact head is disposed in the assembly groove, and the moving contact head further includes two magnetic conductive sheets, which are respectively disposed on the side away from each other of the two moving contact sheets and are in contact with the surface of the moving contact sheets.

[0011] Preferably, the moving contact head further includes two spring plates, which are respectively disposed on opposite sides of the two magnetic conductive plates and are in contact with the surface of the magnetic conductive plates.

[0012] Preferably, it further includes an assembly housing, wherein the moving contact assembly, the stationary contact assembly, and the arc extinguishing assembly are all disposed inside the assembly housing, the moving contact assembly is rotatably connected to the assembly housing, and the stationary contact assembly and the arc extinguishing assembly are fixedly connected to the assembly housing, and a plurality of vent holes are provided on the outer side wall of the assembly housing.

[0013] The beneficial effects of using this utility model are:

[0014] This invention creates a clear disconnection point during use, providing a safe maintenance environment when maintenance is required on the load side. The multiple moving contacts and stationary contacts form multiple contacts when the switch is closed. When a short circuit occurs on the load side, these multiple contacts disperse the short-circuit current, reducing the heat accumulated on each contact and thus preventing contact sticking and protecting the switch from damage. The multiple contacts also disperse large currents, reducing the current flowing through each contact, which significantly reduces the switch's temperature rise and energy loss. Attached Figure Description

[0015] Figure 1 This is an exploded isometric view of the present invention.

[0016] Figure 2 This is an isometric view of the moving contact component in this utility model;

[0017] Figure 3 This is an isometric view of the static contact component in this utility model;

[0018] Figure 4This is an isometric view of the arc-extinguishing component in this utility model;

[0019] Figure 5 This is a schematic diagram of the main structure of the present invention when it is in the open state;

[0020] Figure 6 This is a schematic diagram of the main structure of the present invention when it is in the closed state.

[0021] The reference numerals in the figures include:

[0022] 1-Moving contact assembly, 11-Contact support, 111-Assembly groove, 12-Moving contact head, 121-Moving contact piece, 122-Magnetic guide piece, 123-Spring piece, 2-Static contact assembly, 21-Static contact piece, 22-Static contact, 23-Arc contact, 3-Arc extinguishing assembly, 31-Fixing plate, 32-Arc extinguishing grid, 321-Concave part, 322-Protrusion, 33-Arc initiation angle, 4-Assembly housing, 41-Front housing, 42-Rear housing, 43-Top cover, 44-Exhaust hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this technical solution.

[0024] Example 1

[0025] Please see Figure 1-6 This utility model provides a technical solution: a high-current multi-contact plug-in disconnector contact module, including a moving contact assembly 1 and two stationary contact assemblies 2. The moving contact assembly 1 includes a contact support 11 and a plurality of moving contact heads 12. The stationary contact assembly 2 includes stationary contact plates 21 and a plurality of stationary contacts 22. The two stationary contact assemblies 2 are respectively located on the left and right sides of the moving contact assembly 1, and their structure is centrally symmetrical. The moving contact head 12 includes two moving contact plates 121, two magnetic conductive plates 122, and two spring plates 123. An assembly groove 111 is provided on the side wall of the contact support 11, and the moving contact head 12 is disposed within the assembly groove 111, with the stationary contacts 22 corresponding to the moving contact head 12.

[0026] Please see Figure 1-3Two magnetic plates 122 abut against two moving contact plates 121 within the assembly groove 111. The magnetic plates 122 have a first boss, and the moving contact plates 121 have a groove. The first boss and the groove engage to limit the movement of the moving contact plates 121, preventing them from dislodging. Two spring plates 123 abut against the two magnetic plates 122 within the assembly groove 111, providing contact pressure to prevent contact bounce. A second boss is provided within the assembly groove 111, and two sets of umbrella wings are provided on both sides of the magnetic plates 122. The two sets of umbrella wings engage with the second boss to prevent the magnetic plates 122 from dislodging (the first boss, groove, second boss, and umbrella wings are not shown in the figure). The stationary contact plate 21 has several wiring holes for cable entry and exit, facilitating the installation of cable trays. When the stationary contact assembly 2 is in static contact, several contacts simultaneously conduct current, effectively dispersing the rated current and short-circuit current. When the present invention needs to switch between the open and closed states, the moving contact assembly 1 rotates forward and backward, so that the moving contact head 12 can clamp the stationary contact 22 or separate from the stationary contact 22.

[0027] This invention utilizes a multi-contact structure to disperse rated current and short-circuit current, thereby improving the overall static performance of the switch. The plug-in mechanism formed by the contact support 11 and the moving contact 12 can reduce repeated arcing caused by contact bounce during the opening and closing process, thus reducing damage to the switch contacts.

[0028] Example 2

[0029] Please see Figure 1-4 This utility model also includes two arc-extinguishing components 3, each comprising two fixing plates 31, a plurality of arc-extinguishing grid plates 32, and an arc-starting angle 33. The two arc-extinguishing components 3 are respectively located on the upper and lower sides of the moving contact component 1, and their structure is centrally symmetrical. The stationary contact component 2 also includes an arc contact 23, with the arc-starting angle 33 corresponding to the position of the arc contact 23. The two fixing plates 31 fix the plurality of arc-extinguishing grid plates 32 and the arc-starting angle 33 together. The arc-extinguishing grid plates 32 are provided with concave portions 321 and protrusions 322. Through the plurality of arc-extinguishing grid plates 32, the two arc-extinguishing components 3 can quickly extinguish the electric arc.

[0030] Please see Figure 1-6 When the circuit is closed, the arc contact 23 connects first, thus all the arc is concentrated on the arc contact 23. The stationary contacts 22, which do not have the arc contact 23 installed, connect later, thus no arc is generated. The arc contact 23 is made of a high-temperature resistant alloy, which has strong arc resistance and improves the dynamic electrical performance of the present invention. When the circuit is opened, the stationary contacts 22, which do not have the arc contact 23 installed, break first, thus no arc is generated. The arc contact 23 breaks later, and the generated arc is concentrated on the arc contact 23. The arc extinguishing component 3 covers the rotation range of the moving contact component 1, which can divide the arc, increase the arc voltage, extinguish the arc quickly, and reduce contact erosion.

[0031] Example 3

[0032] Please see Figure 1-6 This utility model also includes an assembly housing 4, in which the moving contact assembly 1, the stationary contact assembly 2, and the arc-extinguishing assembly 3 are all disposed. The assembly housing 4 includes a front housing 41, a rear housing 42, and a top cover 43. The rear housing 42 and the top cover 43 are detachably connected to the front housing 41, and the top cover 43 serves a decorative purpose. The front housing 41 and the rear housing 42 have two circular holes at their centers, which are rotatably connected to the protrusions on both sides of the contact support 11. The outer wall of the assembly housing 4 has several vent holes 44 to facilitate the discharge of high-temperature and high-pressure gases generated by the contacts during opening and closing.

[0033] The working process of this utility model is as follows: Please refer to... Figure 5-6 When the circuit is closed, the moving contact assembly 1 rotates clockwise around its axis, connecting with the stationary contact assembly 2. Several moving contact heads 12 are then inserted into several stationary contacts 22. In this embodiment, the contact support 11 has three moving contact heads 12 and three stationary contacts 22 on each side. When current flows through the circuit, it is divided into three current paths, allowing each group of contacts to carry one-third of the total current. This invention disperses the current distribution, reduces the heat generated by the contacts, saves energy, and improves the static performance of the product. When the circuit is opened, the moving contact assembly 1 rotates counterclockwise around its axis. At the instant the contacts separate, an electric arc is generated, concentrated on the moving contact head 12 and the arc contact 23. The arc is drawn into an arc shape, generating high-temperature, high-pressure gas in the inner cavity of the housing 4. This gas is discharged through several exhaust holes 44. During the discharge process, the electric arc is brought into the arc extinguishing component 3, where it is cut by several arc extinguishing grids 32, thereby increasing the arc voltage and achieving the effect of quickly extinguishing the arc.

[0034] In summary, this invention can disconnect the load-side current, forming a clear disconnection point and providing a safe maintenance environment when the load side requires maintenance. Furthermore, this invention also has the ability to withstand rated current and short-circuit current. By dispersing large currents through multiple contacts, the current flowing through each contact is reduced, significantly lowering the switch temperature and energy loss. In the event of a short circuit on the load side, it also disperses the short-circuit current, reducing heat accumulation on each contact and thus preventing contact adhesion and protecting the switch from damage. The plug-in design increases contact pressure, greatly reducing contact bounce during connection and disconnection, and minimizing damage caused by repeated arcing. It also improves short-time withstand capability from another perspective. Therefore, this invention enhances the overall performance of the high-current disconnector.

[0035] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of this technical content. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this patent.

Claims

1. A high-current multi-contact plug-in disconnector contact module, characterized in that, include: A moving contact assembly, the moving contact assembly including a contact support member, a plurality of moving contact heads are provided on both sides of the contact support member, the moving contact head including two moving contact pieces, and a gap between the two moving contact pieces; Two static contact components are respectively located on the left and right sides of the moving contact component, and the structure is centrally symmetrical. The static contact component includes a static contact piece, and the static contact piece is provided with a plurality of static contacts on the side closer to the moving contact component. The static contacts correspond to the positions of the moving contacts.

2. The high-current multi-contact plug-in disconnector contact module according to claim 1, characterized in that, It also includes two arc-extinguishing components, which are respectively located on the upper and lower sides of the moving contact component and are centrally symmetrical. Each arc-extinguishing component includes two fixing plates and a plurality of arc-extinguishing grid plates are provided between the two fixing plates.

3. The high-current multi-contact plug-in disconnector contact module according to claim 2, characterized in that, The fixing plate is an arc-shaped plate, and the arc-extinguishing grids are radially distributed with gaps between adjacent arc-extinguishing grids.

4. The high-current multi-contact plug-in disconnector contact module according to claim 3, characterized in that, The static contact assembly further includes an arc contact, which is located at one end of any static contact near the arc-extinguishing grid. The arc-extinguishing assembly also includes an arc-initiating angle, which is connected to the outermost arc-extinguishing grid and corresponds to the position of the arc contact.

5. The high-current multi-contact plug-in disconnector contact module according to claim 3, characterized in that, The arc-extinguishing grid plate has a recessed portion and a protruding portion on the side near the static contact assembly, and the recessed portion on any one of the arc-extinguishing grid plates corresponds to the position of the protruding portion on the adjacent arc-extinguishing grid plate.

6. The high-current multi-contact plug-in disconnector contact module according to claim 1, characterized in that, The side wall of the contact support is provided with an assembly groove, the moving contact head is disposed in the assembly groove, and the moving contact head also includes two magnetic plates. The two magnetic plates are respectively disposed on the side away from each other of the two moving contact plates and are in contact with the surface of the moving contact plates.

7. The high-current multi-contact plug-in disconnector contact module according to claim 6, characterized in that, The moving contact head also includes two spring plates, which are respectively disposed on opposite sides of the two magnetic conductive plates and are in contact with the surface of the magnetic conductive plates.

8. The high-current multi-contact plug-in disconnector contact module according to claim 2, characterized in that, It also includes an assembly housing, in which the moving contact assembly, the stationary contact assembly, and the arc extinguishing assembly are all disposed inside the assembly housing. The moving contact assembly is rotatably connected to the assembly housing, and the stationary contact assembly and the arc extinguishing assembly are fixedly connected to the assembly housing. The outer wall of the assembly housing is provided with several vent holes.

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