Environment-friendly upper isolating switch

Abstract

The utility model discloses an environment-friendly upper disconnecting switch, which comprises a moving knife assembly, the moving knife assembly comprises a moving knife and a moving knife holder, the moving knife is provided with a convex hull, the moving knife holder is provided with a recess, the convex hull is embedded with the recess, and the moving knife and the moving knife holder are rotatably connected through a spring contact seat. The effective lap joint number and the heat dissipation area between the lap joint faces are increased, the heat dissipation efficiency is effectively improved, and the 1250A * 1.1 temperature rise test requirement is met in dry air.

Description

Technical Field

[0001] This utility model belongs to the field of electrical technology and relates to an environmentally friendly upper disconnect switch. Background Technology

[0002] 12kA / 630A environmental protection cabinets are gradually replacing sulfur hexafluoride gas ring main units, but replacing 1250A ring main units presents certain challenges. The difficulties lie in: 1. The heat dissipation of dry air is only one-third that of sulfur hexafluoride gas, resulting in poor heat dissipation performance of the environmental protection cabinet; 2. The enclosed isolation blade structure is not conducive to heat dissipation, causing the upper limit parameters of the actual operation of the 1250A ring main unit to only meet the temperature rise test of 1.0 times; 3. The number of effective contact points on the contact surface is small, making it impossible to reduce the contact resistance of the conductive surface. Summary of the Invention

[0003] In order to overcome at least one deficiency of the prior art, this utility model provides an environmentally friendly upper disconnect switch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an environmentally friendly upper disconnect switch, including a moving knife assembly, the moving knife assembly including a moving knife and a moving knife seat, the moving knife having a protrusion, the moving knife seat having a recess, the protrusion and the recess fitting together, the moving knife and the moving knife seat being rotatably connected by a spring contact seat.

[0005] Furthermore, the moving blade is provided with segmented contact points.

[0006] Furthermore, the moving blade assembly also includes a double-point disc spring, which is fixed to the moving blade and close to the segmented contact points.

[0007] Furthermore, the spring contact includes a pin and a spring. The pin passes through the moving blade and the moving blade seat to rotatably connect the two, and the spring is disposed between the end faces of the moving blade and the pin.

[0008] Furthermore, the end face of the moving blade away from the moving blade seat is provided with an inner groove, and the end face of the pin and the spring are located in the inner groove.

[0009] Furthermore, the moving tool holder includes a connecting end and a mounting end. The connecting end is fixed in a horizontal row to form a T-shaped structure, and the connecting end is a flat plate structure.

[0010] Furthermore, the moving blade is provided with a protruding contact block, the contact block is arc-shaped, and the moving blade is provided with several grooves, which divide the contact block into several segmented contact points.

[0011] Furthermore, the dual-point disc springs are distributed along the width direction of the moving blade.

[0012] Furthermore, it also includes a disconnector frame, a disconnector stationary contact, a disconnector transmission component, a disconnector main shaft, and a grounding stationary contact. The disconnector main shaft is rotatably connected to the disconnector frame, the disconnector transmission component is connected to the disconnector main shaft, the moving blade is connected to the disconnector transmission component, and the moving blade contacts the disconnector stationary contact or the grounding stationary contact.

[0013] Furthermore, the stationary contact of the disconnecting switch is fixedly connected to the insulating beam via a main busbar, and the main busbar is a flexible copper foil connection.

[0014] In summary, the advantages of this utility model are as follows:

[0015] 1) The present invention features segmented contacts on the moving blade, which increases the number of contacts of the disconnecting switch in the closed state, effectively improving the efficiency of electronic passage; at the same time, it can better overlap and ensure effective connection. Compared with the existing method of overlapping with a whole structure, it does not require high processing and assembly technology, thus greatly reducing the difficulty of installing and processing parts.

[0016] 2) The double-point disc spring of this utility model can effectively provide contact stability of the edge contact points and provide independent contact pressure for segmented contacts.

[0017] 3) The moving blade of this utility model adopts a non-enclosed structure, which is beneficial for heat dissipation.

[0018] 4) The convex structure of the moving knife in this utility model effectively increases the contact area compared with the existing flat surface. When the convex and concave are fitted together, the moving knife and the moving knife seat are overlapped, thereby effectively increasing the number of contact points between the moving knife and the moving knife seat. At the same time, the fitting of the convex and concave is relatively flexible and has room for movement. Combined with the spring contact seat, in the closed state, it can prevent invalid overlap points caused by the skewness of the moving knife, and ensure the effectiveness of the overlap when there is an allowable angular offset between the moving knife and the mounting plane of the moving knife seat.

[0019] 5) The main busbar of this utility model is made of flexible copper foil. The copper foil has a thin sheet structure. Compared with the main busbar structure of the existing copper busbar, the copper foil has a larger surface area and stronger heat dissipation capacity for the same volume of copper busbar and copper foil.

[0020] 6) This utility model improves the heat dissipation efficiency by optimizing the structure of the conductive copper parts, increasing the effective overlap between the overlapping surfaces and the heat dissipation area, and achieving the temperature rise test requirement of A× in dry air. Attached Figure Description

[0021] Figure 1 This is an isometric view of the disconnector switch of this utility model.

[0022] Figure 2This is a schematic diagram of the internal structure of the disconnecting switch of this utility model. Disconnecting switch 1 and circuit breaker structure.

[0023] Figure 3 This is an isometric drawing of the moving tool of this utility model.

[0024] Figure 4 This is a schematic diagram of the moving blade of this utility model.

[0025] Figure 5 This is a schematic diagram of the moving tool holder of this utility model.

[0026] Figure 6 This is a partial sectional view of the moving blade and moving blade holder assembly of this utility model. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0030] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0031] Example 1:

[0032] like Figures 1-6 As shown, an environmentally friendly upper disconnect switch includes a moving knife assembly 12, which includes a moving knife 120 and a moving knife seat 122. The moving knife 120 and the moving knife seat 122 are rotatably connected by a spring contact seat 123. The moving knife 120 is provided with segmented contacts 1200.

[0033] The segmented contact 1200 is specifically as follows:

[0034] The moving blade 120 is provided with a protruding contact block, which is arc-shaped and distributed along the width of the moving blade 120. The moving blade 120 is provided with a number of grooves 1205, the length direction of which is consistent with the length direction of the moving blade 120. The grooves 1205 divide the contact block into a number of segmented contacts 1200. The segmented contacts 1200 increase the number of contact points of the disconnecting switch in the closed state, effectively improving the efficiency of electronic passage. At the same time, it can better overlap and ensure effective connection. Compared with the existing method of overlapping with a whole structure, this embodiment does not require high processing and assembly technology, thereby greatly reducing the difficulty of installing and processing parts.

[0035] The moving blade assembly 12 also includes a double-point disc spring 121, which is fixed to the moving blade 120 and close to the segmented contact 1200. The double-point disc spring 121 is distributed along the width direction of the moving blade 120. The existing single-point disc spring is used. The single-point disc spring is far from the contact. If the moving blade is too large, the force transmission to the edge of the moving blade will be weakened. The double-point disc spring adopted in this application can effectively provide contact stability of the edge contact and provide independent contact pressure for the segmented contact.

[0036] The non-conventional enclosed structure of the moving blade 120 in this application is beneficial for heat dissipation.

[0037] The two ends of the moving blade 120 are a fixed end 1203 and a free end 1204. The segmented contact 1200 is located at the free end 1204, and the fixed end 1203 is rotatably connected to the moving blade holder 122.

[0038] The moving blade 120 and the moving blade seat 122 are connected by a spring contact seat 123. Specifically, the spring contact seat 123 includes a pin 1231 and a spring 1232. The moving blade 120 is provided with a protrusion 1201, and the moving blade seat 122 is provided with a recess 1221. The protrusion 1201 and the recess 1221 are fitted together. The pin 1231 passes through the moving blade 120 and the moving blade seat 122 to rotatably connect the two. The spring 1232 is disposed between the end faces of the moving blade 120 and the pin 1231.

[0039] The pin 1231 adopts a conventional structure to achieve a rotatable connection between the moving blade 120 and the moving blade holder 122, which will not be described in detail here.

[0040] Compared to existing flat surfaces, the convex hull 1201 structure of the moving knife 120 effectively increases the contact area. When the convex hull 1201 and the recess 1221 are fitted together, the moving knife 120 and the moving knife seat 122 overlap, thereby effectively increasing the number of contact points between the moving knife 120 and the moving knife seat 122. At the same time, the fitting of the convex hull and the recess 1221 is relatively flexible and has room for movement. In the closed state, it can prevent invalid overlap points caused by the skewness of the moving knife, and ensure the effectiveness of the overlap when there is an allowable angular offset between the moving knife and the mounting plane of the moving knife seat.

[0041] The end face of the moving blade 120 away from the moving blade holder 122 is provided with an inner groove 1202, and the end face of the pin 1231 and the spring 1232 are located in the inner groove 1202.

[0042] The moving tool holder 122 is designed as a T-shaped structure, including a connecting end 1221 and a mounting end 1222. The connecting end 1221 is fixed to the mounting end 1222 to form a T-shaped structure. The connecting end 1221 is connected to the moving tool 120. Compared with the existing round bar type moving tool holder, the connecting end 1221 of this application is a flat plate structure, which effectively increases the heat dissipation area.

[0043] The mounting end 1222 is provided with four mounting holes 1223. The four mounting holes 1223 are symmetrically distributed in pairs with the connecting end 1221 as the center. The mounting end 1222 is fixedly connected to the stationary end of the vacuum interrupter.

[0044] The disconnecting switch also includes a disconnecting switch frame 11, a disconnecting switch stationary contact 13, a disconnecting switch transmission component 14, a disconnecting switch main shaft 15, and a grounding stationary contact 16. The disconnecting switch main shaft 15 is rotatably connected to the disconnecting switch frame 11, the disconnecting switch transmission component 14 is connected to the disconnecting switch main shaft 15, the moving blade 120 is connected to the disconnecting switch transmission component 14, and the moving blade 120 contacts the disconnecting switch stationary contact 13 or the grounding stationary contact 16.

[0045] The disconnector frame 11 includes a front plate 111, a rear plate 112, a grounding beam 113, and an insulating beam 114. The front plate 111 and the rear plate 112 are arranged in parallel, as are the grounding beam 113 and the insulating beam 114. The two ends of the grounding beam 113 and the insulating beam 114 are fixedly connected to the front plate 111 and the rear plate 112, respectively.

[0046] Specifically, the connection between the insulating crossbeam 114 and the front plate 111 and rear plate 112 of the disconnecting switch frame is as follows: the front plate 111 of the disconnecting switch frame is provided with a first bending plate, and the rear plate 112 of the disconnecting switch frame is provided with a second bending plate. The two ends of the insulating crossbeam 114 are fastened to the first bending plate and the second bending plate by bolts.

[0047] Specifically, the grounding beam 113 is connected to the front plate 111 and the rear plate 112 of the disconnecting switch frame. The grounding beam 113 has a third bending plate and a fourth bending plate at both ends. The third bending plate is fastened to the front plate 111 of the disconnecting switch frame by bolts, and the fourth bending plate is fastened to the rear plate 112 of the disconnecting switch frame by bolts.

[0048] The stationary contact 13 of the disconnecting switch is fixedly connected to the insulating beam 114 via the main busbar 31. The main busbar 31 is a flexible copper foil with a thin sheet structure. Compared with the existing copper busbar structure, the copper foil has a larger surface area and stronger heat dissipation capacity for the same volume of copper busbar and copper foil.

[0049] The grounding stationary contact 16 is fixed to the grounding crossbeam 113 via the grounding busbar.

[0050] The moving blade 120 is connected to the main shaft 15 of the disconnecting switch through the disconnecting switch transmission component 14. The main shaft 15 of the disconnecting switch transmits its motion to the moving blade 120 through the disconnecting switch transmission component 14. The moving blade 120 changes the grounding, disconnection or closing position, thereby realizing the grounding, opening and closing states of the disconnecting switch 2.

[0051] The disconnector switch transmission component 14 includes two sets of symmetrically arranged disconnector crank arms 141 and two sets of symmetrically arranged moving knife pull rods 142. The fixed end of the disconnector crank arm 141 is fixedly connected to the disconnector switch main shaft 15. The disconnector switch main shaft 15 drives the disconnector crank arm 141 to rotate synchronously. The free end of the disconnector crank arm 141 is rotatably connected to the two sets of moving knife pull rods 142 through a pin. The moving knife 120 is located between the two sets of moving knife pull rods 142 and is rotatably connected through a pin.

[0052] The disconnector switch main shaft 15 is fixed with limit pins. The limit pins are located on both sides of the disconnector crank arm 141 to limit the disconnector crank arm 141 and prevent the disconnector crank arm 141 from moving axially along the disconnector switch main shaft 15.

[0053] The output end of the disconnector spindle 15 is rotatably connected to the rear plate 112 of the disconnector frame, and the input end of the disconnector spindle 15 passes through the front plate 111 of the disconnector frame and is dynamically sealed to the front plate 111 of the disconnector frame.

[0054] In this embodiment, the disconnecting switch can be used independently in existing equipment. The structure of the disconnecting switch not described uses existing components and will not be elaborated here.

[0055] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. An environmentally friendly disconnecting switch, characterized by: The moving knife assembly comprises a moving knife and a moving knife base, the moving knife is provided with a convex, the moving knife base is provided with a concave, the convex is embedded in the concave, and the moving knife and the moving knife base are rotationally connected through a spring contact base.

2. An environmentally friendly disconnecting switch according to claim 1, characterized in that: The moving knife is provided with segmented contacts.

3. An environmentally friendly disconnecting switch according to claim 2, characterized in that: The moving knife assembly further comprises a double-point disc spring, which is fixedly arranged on the moving knife and close to the segmented contacts.

4. The environmentally friendly disconnecting switch of claim 1, wherein: The spring contact base comprises a pin rod and a spring, the pin rod rotationally connects the moving knife and the moving knife base, and the spring is arranged between the end face of the moving knife and the pin rod.

5. An environmentally friendly disconnecting switch according to claim 4, characterized in that: The end face of the moving knife away from the moving knife base is provided with an inner groove, and the end face of the pin rod and the spring are located in the inner groove.

6. An environmentally friendly disconnecting switch according to claim 1, characterized in that: The moving knife base comprises a connecting end and a mounting end, the connecting end is fixedly arranged in a T-shaped structure formed by the horizontal row, and the connecting end is a flat plate structure.

7. The environmentally friendly disconnecting switch of claim 1, wherein: The moving knife is provided with a convex contact block, the contact block is arc-shaped, the moving knife is provided with a plurality of grooves, and the contact block is divided into a plurality of segmented contacts through the grooves.

8. An environmentally friendly disconnecting switch according to claim 3, characterized in that: The double-point disc spring is distributed along the width direction of the moving knife.

9. An environmentally friendly disconnecting switch according to claim 1, characterized in that: The isolation switch further comprises a frame, a static contact, a transmission component, a main shaft and a grounding static contact, the main shaft is rotationally connected with the frame, the transmission component is connected with the main shaft, the moving knife is connected with the transmission component, and the moving knife is in contact with the static contact or the grounding static contact.

10. An environmentally friendly disconnecting switch according to claim 9, characterized in that: The static contact is fixedly connected with the insulating cross beam of the frame through a main busbar, and the main busbar is a soft copper foil.

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