Switching mechanism with floating structure and knife switch cabinet

Abstract

The utility model discloses a switch mechanism with a floating structure, and the structure specifically comprises a switch frame, the inner side of which is provided with a main shaft and a first installation strip; the floating supporting structure is arranged on the first mounting strip; the floating supporting structure is movably arranged on the first mounting strip; copper bar mounting holes are formed in the floating supporting structure; the first connecting end of the knife switch is rotatably arranged on the main shaft in a sleeving manner, and the second connecting end of the knife switch is rotatably connected with the floating supporting structure; and the knife switch is provided with a switch contact for closing. According to the switch mechanism with the floating structure, the position of the knife switch can be adjusted, and bending of the copper bar or damage to the knife switch cabinet caused by forced assembly of the copper bar when the copper bar with inconsistent size is assembled is prevented.

Description

Technical Field

[0001] The utility model relates to the field of knife switch cabinets, in particular to a switch mechanism and a knife switch cabinet with a floating structure. Background Art

[0002] In the existing electrical industry, knife switches all use a moving knife (or moving contact rod) to make linear or circular motion to contact and separate the static contact to connect and disconnect the circuit. The moving knife that makes circular motion has a fixed support point at the center of the circle. Usually, in medium-voltage ring network cabinets and switch cabinet gas boxes, electrical connectors such as branch busbars are generally made of hard copper busbars. However, in existing situations, the dimensional accuracy of copper busbars and copper tubes after bending is poor, resulting in the copper busbar size not matching the switch cabinet. Generally, the switch assembly and the branch busbar are forcibly tightened by fasteners, which leads to high local stress at the connection part, deformation of the electrical contact surface or deformation of the switch assembly, which can easily cause safety problems. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a switch mechanism with a floating structure, which can adapt the knife switch to the size of the copper bar by adjusting the floating support structure.

[0004] In a first aspect, an embodiment of the utility model provides a switch mechanism with a floating structure, comprising:

[0005] A switch frame, the inner side of which is provided with a main shaft and a first mounting bar;

[0006] A floating support structure is arranged on the first mounting bar; the floating support structure is movably arranged on the first mounting bar; a copper busbar mounting hole is arranged on the floating support structure;

[0007] A knife switch, wherein the first connection end of the knife switch is rotatably sleeved on the main shaft, and the second connection end of the knife switch is rotatably connected to the floating support structure; the knife switch is provided with a switch contact for closing the switch.

[0008] In some embodiments of the utility model, the floating support structure includes a first mounting seat; a limiting through hole is provided on the first mounting bar, a fastening hole is provided on the first mounting seat, and the fastening hole is provided on the limiting through hole; the fastening hole and the limiting through hole are floatingly connected by an adjustable fastening screw.

[0009] In some embodiments of the utility model, the floating support structure also includes a moving contact rod connecting structure, and the moving contact rod connecting structure is arranged on the first mounting seat; the knife switch includes an isolating knife driving plate, an isolating switch moving contact rod and a transmission rod; a main shaft mounting hole and a first transmission mounting hole are provided on the isolating knife driving plate, and the isolating knife driving plate can be rotatably mounted on the main shaft through the main shaft mounting hole; a second transmission mounting hole is provided on the isolating switch moving contact rod, the first end of the isolating switch moving contact rod is the switch contact, and the second end of the isolating switch moving contact rod can be rotatably connected to the moving contact rod connecting structure, and the second transmission mounting hole is arranged between the first end and the second end of the isolating switch moving contact rod; the first end of the transmission rod can be rotatably mounted in the first transmission mounting hole, and the second end of the transmission rod is mounted in the second transmission mounting hole.

[0010] In some embodiments of the utility model, a second mounting bar is further provided on the inner side of the switch frame, and the second mounting bar is arranged above the knife switch; an isolating closing contact is provided on the second mounting bar, and the switch contact can contact the isolating closing contact.

[0011] In some embodiments of the utility model, a second mounting seat is provided on the second mounting bar, and the isolating closing contact is provided on a first mounting surface of the second mounting seat; and a branch busbar mounting hole is provided on the second mounting surface of the second mounting seat.

[0012] In some embodiments of the utility model, a third mounting bar is further provided on the inner side of the switch frame, and the third mounting bar and the first mounting bar are arranged on the same horizontal plane; an earthing closing contact is provided on the third mounting bar, and the switch contact can contact the earthing closing contact.

[0013] In some embodiments of the present invention, a first copper bar is installed on the copper bar installation hole; a first end of the first copper bar is installed on the floating support structure, and a second end of the first copper bar is connected to a circuit breaker.

[0014] In a second aspect, the utility model provides a knife switch cabinet, which includes the switch mechanism with a floating structure as described in the above-mentioned embodiment.

[0015] According to the floating support structure of the knife switch and the switch mechanism with a floating structure of the utility model, at least the following beneficial effects are achieved: the switch mechanism with a floating structure provided by the utility model can adjust the position of the knife switch, thereby preventing the copper bar from being bent or the knife switch cabinet from being damaged due to forced assembly of the copper bar of inappropriate size. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is one of the front views of the switch mechanism with a floating structure according to an embodiment of the utility model;

[0018] Figure 2 This is one of the side views of the switch mechanism with a floating structure according to an embodiment of the utility model;

[0019] Figure 3 It is a hierarchical schematic diagram of a switch mechanism with a floating structure according to an embodiment of the utility model;

[0020] Figure 4 This is the second side view of the switch mechanism with floating structure according to the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a switch mechanism with a floating structure according to an embodiment of the utility model;

[0022] Figure 6 It is a schematic diagram of the movement of the floating support structure of an embodiment of the utility model.

[0023] Figure numerals: switch frame 100, main shaft 110, first mounting bar 120, limit through hole 121, knife switch 200, isolating knife drive plate 210, main shaft mounting hole 211, first transmission mounting hole 212, isolating switch moving contact rod 220, second transmission mounting hole 221, switch contact 222, transmission rod 230, floating support structure 300, first mounting seat 310, fastening hole 311, moving contact rod connecting structure 312, copper busbar mounting hole 313, second mounting bar 400, second mounting seat 410, third mounting bar 500, grounding closing contact 510, first copper busbar 600, circuit breaker 700. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first, second or third, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The switch mechanism with a floating structure provided by the utility model can adjust the position of the knife switch, thereby preventing the copper bar from being bent or the knife switch cabinet from being damaged due to forced assembly of the copper bar when assembling a copper bar of inappropriate size.

[0030] The specific structure of the embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0031] Reference Figure 1~Figure 5 , Figure 1 This is a schematic diagram of a switch mechanism with a floating structure according to an embodiment of the utility model. The supporting structure specifically includes:

[0032] The switch frame 100 has a main shaft 110 and a first mounting bar 120 disposed inside;

[0033] The floating support structure 300 is disposed on the first mounting bar 120 ; the floating support structure 300 is movably disposed on the first mounting bar 120 ; a copper bar mounting hole 313 is disposed on the floating support structure 300 ;

[0034] The knife switch 200 has a first connection end rotatably mounted on the main shaft 110 , and a second connection end rotatably connected to the floating support structure 300 ; the knife switch 200 is provided with a switch contact 222 for closing the switch.

[0035] It should be noted that the knife switch 200 provided in the embodiment of the utility model has a floating support structure 300. The purpose of adjusting the position of the floating support structure 300 is to adjust the position of the first copper busbar 600 installed on the copper busbar mounting hole 313, so that the first copper busbar 600 can be smoothly installed in the knife switch cabinet when installing the knife switch cabinet. If the switch mechanism does not have a floating support structure 300, when the first copper bar 600 to be installed is bent or deformed or has an inappropriate size, the position of the floating support structure 300 is fixed, and the deformed first copper bar 600 needs to be forcibly installed and clamped into the knife switch cabinet by manpower; since the first copper bar 600 is relatively strong, various installation tools are needed to assist in the installation, which is cumbersome, time-consuming and labor-intensive, and the first copper bar 600 after the final installation may deform again on the basis of the first expansion deformation, causing the cabinet body of the knife switch cabinet itself to be damaged, which is very likely to cause safety hazards when the switch cabinet is used subsequently. The knife switch 200 provided in the embodiment of the utility model can increase or reduce the installation space of the first copper bar 600 by adjusting the position of the floating support structure 300, so that the first copper bar 600 can be more smoothly installed in the switch cabinet, avoiding further deformation of the first copper bar 600 or damage to the switch cabinet.

[0036] Reference Figure 2~Figure 4 , Figure 6 In some embodiments of the utility model, the floating support structure 300 includes a first mounting seat 310; a limiting through hole 121 is provided on the first mounting bar 120, and a fastening hole 311 is provided on the first mounting seat 310, and the fastening hole 311 is provided on the limiting through hole 121; the fastening hole 311 and the limiting through hole 121 are floatingly connected by an adjustable fastening screw.

[0037] It should be noted that the floating support structure 300 provided in the embodiment of the utility model is floatingly connected to the first mounting bar 120, and can slide on the first mounting bar 120 along the direction limited by the limiting through hole 121 to adjust the position of the floating support structure 300. The fastening hole 311 and the limiting through hole 121 are floatingly connected by an adjustable fastening screw. When the floating support structure 300 needs to be moved, the fastening screw needs to be loosened to allow the first mounting seat 310 to slide on the first mounting bar 120; when the floating support structure 300 does not need to be moved, the first mounting seat 310 can be fixed to the first mounting bar 120 by locking the fastening screw. Furthermore, the copper busbar mounting hole 313 is provided on the first mounting seat 310. When the first mounting seat 310 moves, the position of the copper busbar mounting hole 313 can also be changed at the same time; in addition, as Figure 6As shown, the shape of the limiting through hole 121 can be a rectangle, so that the fastening screw is limited by the width of the rectangle and can only move along the direction of the length of the rectangle, thereby adjusting the position of the floating support structure 300.

[0038] In some embodiments of the present invention, the floating support structure 300 also includes a moving contact rod connecting structure 312, and the moving contact rod connecting structure 312 is arranged on the first mounting seat 310; the knife switch 200 includes an isolation knife driving plate 210, an isolation switch moving contact rod 220 and a transmission rod 230; the isolation knife driving plate 210 is provided with a spindle mounting hole 211 and a first transmission mounting hole 212, and the isolation knife driving plate 210 is rotatably sleeved on the spindle 110 through the spindle mounting hole 211; the isolation knife driving plate 210 is provided with a spindle mounting hole 211 and a first transmission mounting hole 212; the isolation knife driving plate 210 is rotatably sleeved on the spindle 110; A second transmission mounting hole 221 is provided on the switch moving contact rod 220, the first end of the isolating switch moving contact rod 220 is the switch contact 222, the second end of the isolating switch moving contact rod 220 is rotatably connected to the moving contact rod connecting structure 312, and the second transmission mounting hole 221 is provided between the first end and the second end of the isolating switch moving contact rod 220; the first end of the transmission rod 230 is rotatably mounted in the first transmission mounting hole 212, and the second end of the transmission rod 230 is mounted in the second transmission mounting hole 221.

[0039] It should be noted that the transmission connection structure composed of the isolating knife driving plate 210, the isolating switch moving contact rod 220 and the transmission rod 230 is the main component of the knife switch 200, the main shaft mounting hole 211 is the first connection end of the knife switch 200, and the second end of the isolating switch moving contact rod 220 is the second connection end of the knife switch 200; the isolating knife driving plate 210 is rotated to control the opening and closing of the isolating switch moving contact rod 220, and the isolating switch moving contact rod 220 uses the floating support structure 300 as a rotation fulcrum. Further, when the position of the floating support structure 300 changes, the position of the switch contact 222 on the isolating switch moving contact rod 220 will be offset from the original position. Therefore, the size of the limit through hole 121 can be set according to the needs to limit the moving distance and direction of the floating support structure 300 to a certain extent, so as to avoid excessive deviation of the position of the switch contact 222 after the floating support structure 300 moves, resulting in a virtual closing during the closing process.

[0040] In some embodiments of the utility model, a second mounting bar 400 is further provided on the inner side of the switch frame 100, and the second mounting bar 400 is provided above the knife switch 200; an isolating closing contact is provided on the second mounting bar 400, and the switch contact 222 can contact the isolating closing contact.

[0041] It should be noted that the isolation closing contact (not shown in the figure) provided on the second mounting bar 400 is used to realize the isolation closing state of the knife switch 200. The isolation closing state means that the circuit breaker 700 or other switch device in the switch cabinet is in the closed state, the circuit is connected, and power can be transmitted from the power supply to the load. In this state, the current can flow freely in the device and the load can work normally.

[0042] Reference Figure 5 In some embodiments of the utility model, a second mounting seat 410 is provided on the second mounting bar 400, and the isolating closing contact is provided on the first mounting surface of the second mounting seat 410; and a branch busbar mounting hole is provided on the second mounting surface of the second mounting seat 410.

[0043] It should be noted that, in addition to being used as an isolating closing contact, the second mounting seat 410 on the second mounting bar 400 can also be used as a mounting point for a branch busbar (not shown in the figure) (the specific position of the mounting point is not shown in the figure). The branch busbar in the knife switch cabinet is used as an intermediate structure for electrical transmission to transmit and distribute electrical energy. The mounting point of the branch busbar provided in the embodiment of the utility model enables the switch device of the utility model to be extended and connected to other electrical structures through the branch busbar.

[0044] Reference Figure 5 In some embodiments of the utility model, a third mounting bar 500 is further provided on the inner side of the switch frame 100 , and the third mounting bar 500 and the first mounting bar 120 are arranged on the same horizontal plane; a grounding closing contact 510 is provided on the third mounting bar 500 , and the switch contact 222 can contact the grounding closing contact 510 .

[0045] It should be noted that the grounding closing contact 510 provided on the second mounting bar 400 is used to realize the grounding closing state of the knife switch 200. The provision of the grounding closing contact 510 can establish an electrical connection between the metal housing of the device or other components that need to be grounded and the ground, and quickly introduce current into the ground when a fault occurs.

[0046] Reference Figure 4 In some embodiments of the present invention, a first copper bar 600 is installed on the copper bar installation hole 313; a first end of the first copper bar 600 is installed on the floating support structure 300, and a second end of the first copper bar 600 is connected to the circuit breaker 700.

[0047] It should be noted that the first copper bar 600 connected to the floating support structure 300 is also connected to the circuit breaker 700 in the knife switch cabinet. After the first copper bar 600 is installed on the floating support structure 300, if the size of the first copper bar 600 is different from the required size, the position of the floating support structure 300 can be adjusted to leave enough installation space for the first copper bar 600 or reduce the installation space, so as to avoid damaging the circuit breaker 700 by forcibly installing a copper bar of inappropriate size.

[0048] In a second aspect, an embodiment of the utility model provides a knife switch cabinet, which includes a switch mechanism with a floating structure according to the embodiment of the above aspect.

[0049] It should be noted that, in addition to the switch mechanism with a floating structure, the knife switch cabinet also realizes an extended connection through a second mounting base 410 of the switch mechanism with a floating structure, and is connected to the circuit breaker 700 through the first copper busbar 600, so as to realize the basic functions of the knife switch cabinet. At the same time, by adjusting the position of the floating support structure 300, it is possible to avoid damage to the switch cabinet and cause danger due to the copper busbar of inappropriate size.

[0050] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A switch mechanism with a floating structure, characterized in that: include: A switch frame, the inner side of which is provided with a main shaft and a first mounting bar; A floating support structure, disposed on the first mounting bar; The floating support structure is movably arranged on the first mounting bar; a copper busbar mounting hole is arranged on the floating support structure; A knife switch, wherein the first connection end of the knife switch is rotatably sleeved on the main shaft, and the second connection end of the knife switch is rotatably connected to the floating support structure; the knife switch is provided with a switch contact for closing the switch.

2. The switch mechanism with a floating structure according to claim 1, characterized in that: The floating support structure includes a first mounting seat; a limiting through hole is arranged on the first mounting bar, a fastening hole is arranged on the first mounting seat, and the fastening hole is arranged on the limiting through hole; the fastening hole and the limiting through hole are floatingly connected by an adjustable fastening screw.

3. The switch mechanism with a floating structure according to claim 2, characterized in that: The floating support structure also includes a moving contact rod connecting structure, which is arranged on the first mounting seat; the knife switch includes an isolating knife driving plate, an isolating switch moving contact rod and a transmission rod; a main shaft mounting hole and a first transmission mounting hole are provided on the isolating knife driving plate, and the isolating knife driving plate is rotatably mounted on the main shaft through the main shaft mounting hole; a second transmission mounting hole is provided on the isolating switch moving contact rod, the first end of the isolating switch moving contact rod is the switch contact, the second end of the isolating switch moving contact rod is rotatably connected to the moving contact rod connecting structure, and the second transmission mounting hole is provided between the first end and the second end of the isolating switch moving contact rod; the first end of the transmission rod is rotatably mounted in the first transmission mounting hole, and the second end of the transmission rod is mounted in the second transmission mounting hole.

4. The switch mechanism with a floating structure according to claim 1, characterized in that: A second mounting bar is also provided inside the switch frame, and the second mounting bar is provided above the knife switch; an isolating closing contact is provided on the second mounting bar, and the switch contact can contact the isolating closing contact.

5. The switch mechanism with a floating structure according to claim 4, characterized in that: A second mounting seat is arranged on the second mounting bar, and the isolating closing contact is arranged on a first mounting surface of the second mounting seat; and a branch busbar mounting hole is arranged on the second mounting surface of the second mounting seat.

6. The switch mechanism with a floating structure according to claim 1, characterized in that: A third mounting bar is also provided inside the switch frame, and the third mounting bar and the first mounting bar are arranged on the same horizontal plane; an earthing closing contact is provided on the third mounting bar, and the switch contact can contact the earthing closing contact.

7. The switch mechanism with a floating structure according to claim 1, characterized in that: A first copper bar is installed on the copper bar installation hole; a first end of the first copper bar is installed on the floating support structure, and a second end of the first copper bar is connected to the circuit breaker.

8. A knife switch cabinet, characterized in that: The knife switch cabinet comprises a switch mechanism with a floating structure as described in any one of claims 1 to 7.

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