Static contact for isolating switch

Abstract

The utility model relates to the technical field of disconnecting switches, in particular to a static contact for a disconnecting switch, which comprises a static contact and a horizontally arranged feeler lever mounted at the bottom of the static contact, symmetrically arranged mounting blocks are fixedly connected to the outer side of the feeler lever, and reaction components are symmetrically mounted on the sides, away from the feeler lever, of the mounting blocks. According to the utility model, through the arrangement of the mounting block, the reaction assembly, the connecting rod, the baffle plate, the reaction spring, the connecting plate, the contact plate, the conductive plate and the contact semi-open tube, when the device is used, the moving contact extends out and is clamped towards the direction of the contact rod, the contact plate moves to drive the contact semi-open tube to move, the reaction spring is stressed and compressed, and the contact semi-open tube is clamped by the baffle plate. According to the design, the contact area of the moving contact and the feeler lever can be increased, pressure compensation can be automatically carried out between the moving contact and the feeler lever, and unstable contact caused by external factors is avoided.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, specifically to a stationary contact for a disconnecting switch. Background Technology

[0002] High-voltage disconnect switches are important switching devices in the electrical systems of power plants and substations. They must be used in conjunction with high-voltage circuit breakers. Disconnect switches are suitable for indoor installations with a three-phase AC 50Hz rated voltage of 12KV. They are used to connect, disconnect, or switch lines when there is voltage but no load current in high-voltage equipment. Their main functions are to ensure the safety of high-voltage electrical equipment during maintenance and to isolate voltage. When the disconnect switch is closed, the moving contact moves to the outside of the stationary contact and clamps the contact rod of the stationary contact, thereby achieving the purpose of voltage isolation. High-voltage disconnect switches are classified into indoor and outdoor types according to the installation location, and into single-pole, double-pole, and triple-pole types according to the number of insulating supports. Equipment is available for each voltage level.

[0003] The existing stationary contacts for disconnecting switches are widely used, but when the disconnecting switch is closed, the moving contact can only clamp the contact rod of the stationary contact, resulting in a small contact area. This makes the contact unstable due to external factors (such as strong winds). Therefore, a new stationary contact for disconnecting switches is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a stationary contact for a disconnecting switch to solve the problem of unstable contact in existing devices mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A stationary contact for a disconnecting switch includes a stationary contact and a horizontally arranged contact rod mounted on the bottom of the stationary contact. Symmetrically arranged mounting blocks are fixedly connected to the outer side of the contact rod. A reaction assembly is symmetrically mounted on the side of the mounting blocks away from the contact rod. A connecting plate is mounted on the outer side of the reaction assembly. A horizontally arranged contact plate is fixedly connected between the two connecting plates. A horizontally arranged conductive plate is symmetrically fixedly connected to the side of the contact plate near the contact rod. A contact semi-open tube is fixedly connected to the side of the conductive plate away from the contact rod.

[0007] Preferably, the contact plate and the contact rod are horizontally aligned, and the inner shape of the contact semi-open tube is adapted to the outer shape of the contact rod.

[0008] Preferably, the reaction component includes a connecting rod that is horizontally arranged and fixedly connected to the side of the mounting block away from the contact rod, a baffle is fixedly connected to the end of the connecting rod away from the mounting block, and a reaction spring is provided on the outside of the connecting rod.

[0009] Preferably, the connecting rod passes through the connecting plate and is slidably connected to the connecting plate, and the side of the baffle closest to the connecting plate is tightly fitted to the connecting plate.

[0010] Preferably, one end of the reaction spring is fixedly connected to the mounting block, and the end of the reaction spring away from the mounting block is fixedly connected to the connecting plate.

[0011] Preferably, a copper heat-conducting plate is fixedly connected to both the top of the upper conductive plate and the bottom of the lower conductive plate. The outer surface of the copper heat-conducting plate has a groove, and the interior of the copper heat-conducting plate has a ventilation hole that runs horizontally through the copper heat-conducting plate.

[0012] Preferably, there are multiple copper heat-conducting plates, which are evenly distributed on the outer side of the conductive plate. There are also multiple grooves and ventilation holes, which are evenly distributed on the copper heat-conducting plates.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting up an installation block, a reaction component, a connecting rod, a baffle, a reaction spring, a connecting plate, a contact plate, a conductive plate, and a contact semi-open tube, when using the device, the moving contact extends and clamps towards the contact rod. The movement of the contact plate drives the movement of the contact semi-open tube, and the reaction spring is compressed until the inner side of the contact semi-open tube is tightly fitted with the outer side of the contact rod, and the moving contact and the contact plate are tightly fitted. This design can increase the contact area between the moving contact and the contact rod, and can automatically compensate for the pressure between the moving contact and the contact rod, avoiding contact instability caused by external factors.

[0015] 2. In this utility model, through the provided copper heat-conducting plate, grooves, and ventilation holes, the heat generated by the contact rod and its connecting components during use can be introduced into the interior of the copper heat-conducting plate through the conductive plate and dissipated through the copper heat-conducting plate. The grooves provided on the copper heat-conducting plate increase its contact area with the air, which is conducive to the dissipation of heat. The ventilation holes provided on the copper heat-conducting plate facilitate air circulation and improve the heat dissipation rate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the contact rod connecting component of this utility model;

[0018] Figure 3 This is a schematic diagram of the copper heat-conducting plate structure of this utility model;

[0019] Figure 4 This is a schematic diagram showing the disassembled structure of the contact rod connecting component of this utility model;

[0020] Figure 5 This is a schematic diagram of the contact plate connecting component of this utility model.

[0021] In the diagram: 1. Stationary contact; 2. Contact rod; 3. Mounting block; 4. Reaction assembly; 41. Connecting rod; 42. Baffle; 43. Reaction spring; 5. Connecting plate; 6. Contact plate; 7. Conductive plate; 8. Contact semi-open tube; 9. Copper heat-conducting plate; 10. Groove; 11. Ventilation hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] A stationary contact for a disconnecting switch includes a stationary contact 1 and a horizontally positioned contact rod 2 mounted at the bottom of the stationary contact 1. Symmetrically arranged mounting blocks 3 are fixedly connected to the outer side of the contact rod 2. A reaction assembly 4 is symmetrically mounted on the side of the mounting blocks 3 away from the contact rod 2. A connecting plate 5 is mounted on the outer side of the reaction assembly 4. A horizontally positioned contact plate 6 is fixedly connected between the two connecting plates 5. A horizontally positioned conductive plate 7 is symmetrically fixedly connected to the side of the contact plate 6 near the contact rod 2. A contact semi-open tube 8 is fixedly connected to the side of the conductive plate 7 away from the contact rod 2. The contact plate 6 and the contact rod 2 are horizontally aligned. The inner shape of the contact semi-open tube 8 matches the outer shape of the contact rod 2. The reaction assembly 4 includes a horizontally positioned connecting rod 41 fixedly connected to the side of the mounting blocks 3 away from the contact rod 2. A baffle 42 is fixedly connected to the end of the connecting rod 41 away from the mounting blocks 3. A reaction spring 43 is provided on the outer side of the connecting rod 41. The connecting rod 41 passes through the connecting plate 5 and is slidably connected to the connecting plate 5. The side of the baffle 42 close to the connecting plate 5 is tightly fitted with the connecting plate 5. One end of the reaction spring 43 is fixedly connected to the mounting block 3, and the other end of the reaction spring 43 away from the mounting block 3 is fixedly connected to the connecting plate 5. Through the mounting block 3, reaction component 4, connecting rod 41, baffle 42, reaction spring 43, connecting plate 5, contact plate 6, conductive plate 7, and contact semi-open tube 8, when the device is in use, the moving contact extends and clamps towards the contact rod 2. The movement of the contact plate 6 drives the movement of the contact semi-open tube 8, and the reaction spring 43 is compressed until the inner side of the contact semi-open tube 8 is tightly fitted with the outer side of the contact rod 2. The moving contact and the contact plate 6 are tightly fitted. This design can increase the contact area between the moving contact and the contact rod 2 and can automatically compensate for the pressure between the moving contact and the contact rod 2, avoiding contact instability caused by external factors.

[0027] Both the top of the upper conductive plate 7 and the bottom of the lower conductive plate 7 are fixedly connected to copper heat-conducting plates 9. Grooves 10 are formed on the outer surface of the copper heat-conducting plates 9, and horizontal ventilation holes 11 are formed inside the copper heat-conducting plates 9. There are multiple copper heat-conducting plates 9, evenly distributed on the outer side of the conductive plates 7. The grooves 10 and ventilation holes 11 are also evenly distributed on the copper heat-conducting plates 9. Through the copper heat-conducting plates 9, grooves 10, and ventilation holes 11, the heat generated by the contact rod 2 and its connecting components during use can be introduced into the interior of the copper heat-conducting plates 9 through the conductive plates 7 and dissipated through the copper heat-conducting plates 9. The grooves 10 on the copper heat-conducting plates 9 increase their contact area with air, facilitating heat dissipation. The ventilation holes 11 on the copper heat-conducting plates 9 promote air circulation and improve the heat dissipation rate.

[0028] Working process: Before use, install the stationary contact 1 and contact rod 2 in their respective positions. When the disconnecting switch is closed, the moving contact extends and clamps towards the contact rod 2. When the moving contact contacts the contact plate 6, the contact plate 6 moves, causing the connecting plate 5 to slide outside the connecting rod 41 on the side of the baffle 42. The reaction spring 43 on the side of the mounting block 3 is compressed. The contact plate 6, the conductive plate 7, and the contact half-open tube 8 continue to move until the inner side of the contact half-open tube 8 is tightly pressed against the outer side of the contact rod 2, and the moving contact and the contact plate 6 are tightly pressed together. At this time, because the reaction spring 43 is always compressed, the reaction force can counteract the clamping force of the moving contact, so that the moving contact is always pressed against the contact plate 6. During the closing process of the moving contact, a large number of strong electric arcs are generated. The electric arcs and continuous energization will cause the device to heat up rapidly. The contact area of ​​the contact rod 2 with air is limited, and the heat dissipation rate is low. The contact rod 2 is relatively slow, and prolonged exposure to high temperatures may cause deformation of the contact rod 2, reducing its service life. In this case, the heat generated by the contact rod 2 and its connecting components can be introduced into the interior of the copper heat-conducting plate 9 through the conductive plate 7 and dissipated through the copper heat-conducting plate 9. The groove 10 provided on the copper heat-conducting plate 9 increases its contact area with the air, which is conducive to heat dissipation. The ventilation holes 11 provided on the copper heat-conducting plate 9 facilitate air circulation and improve the heat dissipation rate. When the disconnecting switch is opened, the moving contact opens and disengages from the contact rod 2. At this time, the reaction spring 43 resets, which can drive the contact plate 6 to reset, and the contact half-open tube 8 disengages from the contact rod 2. The design of the reaction component 4 and its connecting components can increase the contact area between the moving contact and the contact rod 2 and can automatically compensate for the pressure between the moving contact and the contact rod 2, avoiding contact instability caused by external factors.

[0029] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A static contact for a disconnector, comprising a static contact (1) and a horizontally arranged contact stem (2) mounted at the bottom of the static contact (1), characterized in that: The touch rod (2) is fixedly connected with mounting blocks (3) arranged symmetrically, the mounting blocks (3) are symmetrically provided with reaction assemblies (4) away from the touch rod (2), the reaction assemblies (4) are provided with connecting plates (5) on the outer sides, the connecting plates (5) are fixedly connected with horizontally arranged touch plates (6) between the two connecting plates (5), the touch plates (6) are symmetrically fixedly connected with horizontally arranged conductive plates (7) on the side close to the touch rod (2), and the conductive plates (7) are fixedly connected with contact half-open pipes (8) away from the touch rod (2).

2. The stationary contact for a disconnector according to claim 1, characterized in that The touch plate (6) is horizontally aligned with the touch rod (2), and the contact half-open pipe (8) is internally shaped to be matched with the shape of the outer side of the touch rod (2).

3. The stationary contact for a disconnector according to claim 2, characterized in that The reaction assembly (4) comprises a connecting rod (41) horizontally arranged and fixedly connected to the side of the mounting block (3) away from the touch rod (2), one end of the connecting rod (41) away from the mounting block (3) is fixedly connected with a baffle (42), and the outer side of the connecting rod (41) is provided with a reaction spring (43).

4. The stationary contact for a disconnector according to claim 3, characterized in that: The connecting rod (41) penetrates through the connecting plate (5) and is slidably connected with the connecting plate (5), and the side of the baffle (42) close to the connecting plate (5) is tightly attached to the connecting plate (5).

5. The stationary contact for a disconnector according to claim 4, characterized in that: One end of the reaction spring (43) is fixedly connected with the mounting block (3), and the other end of the reaction spring (43) away from the mounting block (3) is fixedly connected with the connecting plate (5).

6. The stationary contact for a disconnector according to claim 1, characterized in that: The top end of the upper conductive plate (7) is fixedly connected with a red copper heat-conducting plate (9), and the bottom end of the lower conductive plate (7) is fixedly connected with the red copper heat-conducting plate (9), a groove (10) is formed in the outer surface of the red copper heat-conducting plate (9), and a ventilation hole (11) horizontally penetrating through the red copper heat-conducting plate (9) is formed in the red copper heat-conducting plate (9).

7. The stationary contact for a disconnector according to claim 6, characterized in that The number of the red copper heat-conducting plates (9) is multiple, the red copper heat-conducting plates (9) are uniformly distributed on the outer side of the conductive plate (7), the number of the grooves (10) and the ventilation holes (11) is multiple, and the grooves (10) and the ventilation holes (11) are uniformly distributed on the red copper heat-conducting plate (9).

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