Transmission structure of air box type vacuum alternating current contactor

Abstract

The utility model relates to a transmission structure of a gas box type vacuum alternating current contactor, which comprises a box body, a closed inner cavity is arranged in the box body, and inert gas is filled in the inner cavity; the rotary sealing piece is installed on a side plate of the box body in a sealing mode, the inner end of a rotary piece in the rotary sealing piece is connected with a transmission shaft of the operating mechanism, and the outer end of the transmission shaft is connected with a trigger piece; the power supply control unit is mounted on the outer side of the side wall of the box body, a power supply controller is electrically connected with an electromagnet in the operating mechanism, and the power supply controller comprises at least one auxiliary switch; the transmission shaft drives the triggering piece to rotate through the rotating piece, and the triggering piece rotates to trigger the auxiliary switch. The creepage distance in the box body is reduced, the safety is ensured, meanwhile, all parts in the box body can be made smaller, and the box body structure is made smaller.

Description

Technical Field

[0001] The utility model relates to the field of power grid switch equipment, in particular to a gas box type vacuum AC contactor transmission structure. Background Art

[0002] The vacuum AC contactor includes a box body, an operating mechanism and a three-phase vacuum arc extinguishing mechanism. Each vacuum arc extinguishing mechanism includes a vacuum bubble and an insulating pull rod. The output end of the operating mechanism is a transversely arranged transmission shaft, which is respectively connected to the three insulating pull rods. The reciprocating rotation of the transmission shaft drives the insulating pull rods to move up and down synchronously to realize the opening and closing operations of the vacuum arc extinguishing mechanism.

[0003] The operating mechanism is composed of a closing coil with an iron core and an armature. When the coil is energized or de-energized, the armature is driven to move, thereby closing or opening the contactor. In the current vacuum AC contactor, the box is open (commonly known as air-type vacuum AC contactor), that is, the operating mechanism and the three-phase vacuum arc extinguishing mechanism are directly in contact with the air. Compared with circuit breakers, vacuum AC contactors are frequently used and have higher reliability requirements.

[0004] The problems existing in the current air type vacuum AC contactor are:

[0005] 1. To ensure the safety of the equipment, it is necessary to increase the creepage distance and electrical clearance, and the equipment volume will be made larger. The current total height of the box is 699mm, the total length is 615mm, the phase spacing of the vacuum arc extinguishing mechanism is 200mm, the vacuum bubble height is 210mm, and the insulating pull rod height is 236mm.

[0006] 2. The power controller and auxiliary switch used to control the power on and off of the operating mechanism were previously installed in the box. The auxiliary switch needs to be operated once during each opening process and is a wearing part. In the past, the power controller was directly installed in the box. Whenever it was disassembled and repaired, the cabinet and the mechanism needed to be disassembled, resulting in high maintenance costs. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, provide an air box type vacuum AC contactor transmission structure, and solve the problems of large volume, vulnerable parts, power controllers, and high maintenance costs of auxiliary switches of traditional air type vacuum AC contactors.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] Provided is a gas box type vacuum AC contactor transmission structure, comprising:

[0010] A box body, wherein a sealed inner cavity is provided in the box body, the inner cavity is filled with an inert gas, the inner cavity of the box body comprises a separated operating cavity and an arc extinguishing cavity, an operating mechanism is installed in the operating cavity, and a three-phase arc extinguishing mechanism is installed in the arc extinguishing cavity;

[0011] A rotary seal is installed on the side plate of the box body for sealing, the inner end of the rotary member in the rotary seal is connected to the transmission shaft of the operating mechanism, and the outer end of the transmission shaft is connected to the trigger member;

[0012] A power controller and at least one auxiliary switch, wherein the power controller and the auxiliary switch are both mounted on the outside of the side wall of the box body, the power controller is electrically connected to the electromagnet in the operating mechanism and the terminal module respectively, and the auxiliary switch is electrically connected to the terminal module.

[0013] Furthermore, the power controller and the auxiliary switch are arranged on a mounting frame, and the mounting frame is fixedly arranged on the outer side wall of the box body.

[0014] Furthermore, the triggering member includes

[0015] An outer rotating shaft, one end of which is connected to the rotating member, and the other end of which is matched with the mounting frame for rotation support;

[0016] A pressing plate, the pressing plate is fixedly connected to the outer rotating shaft, and at least one trigger head is arranged on the pressing plate, and the number of the trigger heads corresponds to the number of the auxiliary switches;

[0017] The outer rotating shaft drives the pressing plate to rotate, thereby triggering the auxiliary switch through the trigger head.

[0018] Further, the rotary seal comprises a mounting member and a rotating member;

[0019] The mounting member comprises a cylinder and an end plate, wherein the end plate and the cylinder are an integral structure; the cylinder is inserted into the side plate of the box body and is threadedly connected with the side plate, and a sealing ring is arranged on the inner side surface of the end plate to form a sealing fit between the end plate and the outer wall of the side plate;

[0020] A rotating member is inserted into a cylinder, a baffle ring is arranged in the middle of the cylinder, an inner baffle plate and an outer baffle plate are arranged on the rotating member, an inner bearing and an outer bearing are arranged on the rotating member, the inner bearing is located between the inner baffle plate and the baffle ring, a sealing member is arranged between the inner bearing and the baffle ring, the outer bearing is arranged between the outer baffle plate and the baffle ring, an inner connecting cavity and an outer connecting cavity are arranged in the rotating member, the inner connecting cavity is connected to the transmission shaft, and the outer connecting cavity is connected to the trigger member.

[0021] Furthermore, in the three-phase arc extinguishing mechanism, the phase spacing is less than 200 mm, the vacuum bubble height is less than 200 mm, and the insulating pull rod height is less than 200 mm.

[0022] Furthermore, the total height of the box is less than 600 mm, and the total length is less than 600 mm.

[0023] The beneficial effects of the utility model are:

[0024] The utility model discloses an air box type vacuum AC contactor transmission structure, wherein the box body is made into a sealed structure and filled with inert gas, thereby reducing the creepage distance in the box body and ensuring safety, and at the same time, the various contactor components in the box body can be made smaller, and the contactor can be made smaller.

[0025] Secondly, the power controller and auxiliary switch of the wearing parts are installed outside the box, which makes it more convenient to replace the wearing parts and realizes maintenance-free internal structure of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] Figure 1 and Figure 2 This is a schematic diagram of the transmission structure of the gas box type vacuum AC contactor of the utility model (the box body is partially disassembled);

[0028] Figure 3 This is a schematic diagram of the transmission structure of the gas box type vacuum AC contactor of the utility model;

[0029] Figure 4 It is a schematic diagram of the power controller, mounting bracket and auxiliary switch;

[0030] Figure 5 It is a schematic diagram of a tight rotating seal;

[0031] Figure 6 It is a structural diagram between the trigger and the auxiliary switch;

[0032] in,

[0033] 1. Box body, 2. Operating mechanism, 3. Arc extinguishing mechanism;

[0034] 4. Rotating seal, 41. Mounting part, 411. Cylinder, 412. End plate, 413. Sealing ring;

[0035] 42, rotating member, 421, inner connecting cavity, 422, outer connecting cavity;

[0036] 43. inner bearing, 44. outer bearing, 45. inner baffle, 46. outer baffle, 47. baffle ring, 48. sealing element;

[0037] 51. mounting frame, 52. power controller, 53. auxiliary switch;

[0038] 6. trigger member, 61. outer rotating shaft, 62. pressure plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The present application provides a gas box type vacuum AC contactor transmission structure, which is described in detail below. It should be noted that the description order of the following embodiments is not a limitation on the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0041] In order to solve the technical problems of large size, high maintenance cost of vulnerable parts, power controller and auxiliary switch of the conventional air type vacuum AC contactor in the prior art, an embodiment of the present application provides a transmission structure of an air box type vacuum AC contactor, which is described in detail below.

[0042] like Figures 1 to 6 As shown, an air box type vacuum AC contactor transmission structure is characterized in that it includes

[0043] A box body 1, wherein a sealed inner cavity is provided in the box body 1, and the inner cavity is filled with an inert gas. The inner cavity of the box body includes a separated operating cavity and an arc extinguishing cavity, an operating mechanism 2 is installed in the operating cavity, and a three-phase arc extinguishing mechanism 3 is installed in the arc extinguishing cavity;

[0044] A rotary seal 4 is installed on the side plate of the housing 1 for sealing, wherein the inner end of a rotary member 42 in the rotary seal is connected to the transmission shaft of the operating mechanism 2, and the outer end of the transmission shaft is connected to the trigger member;

[0045] A power controller 52 and at least one auxiliary switch 53, wherein the power controller 52 and the auxiliary switch 53 are both mounted on the outside of the side wall of the housing 1, wherein the power controller 52 is electrically connected to the electromagnet in the operating mechanism 2 and the terminal module respectively, and the auxiliary switch 53 is electrically connected to the terminal module.

[0046] When the device needs to be closed, the terminal module supplies power to the power controller 52, so that the power controller 52 controls the electromagnet to be energized, driving the transmission shaft of the operating mechanism to rotate for closing. When the transmission shaft rotates to the closing position, the auxiliary switch 53 is abutted by an external trigger, and the auxiliary switch 53 then transmits a closing signal to the terminal module, and the terminal module makes other arrangements according to the signal.

[0047] When the switch needs to be opened, the terminal module cancels the power supply to the power controller 52 , and the power controller 52 controls the electromagnet to lose power, the transmission seat rotates to open the switch, and the trigger element disengages from the auxiliary switch 53 .

[0048] Sulfur hexafluoride may be used as the inert gas.

[0049] When the side panels of the box body 1 are connected, sealing strips are arranged at the joints to ensure that the box body 1 is in a sealed state.

[0050] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the power controller 52 and the auxiliary switch 53 are arranged on a mounting frame 51, and the mounting frame 51 is fixedly arranged on the outer side of the side wall of the box.

[0051] In this embodiment, the number of the auxiliary switches 53 is two.

[0052] In this embodiment, the mounting frame 51 is a U-shaped structure as a whole, the auxiliary switch 53 is installed in the mounting frame 51, one side of the mounting frame 51 is fixedly connected to the box body 1, and four connecting bolts are set between the two parallel plates of the mounting frame 51, and the mounting frame 51 is fixed to the box body 1 through these four connecting bolts.

[0053] Specifically, as an optional implementation in this embodiment, Figure 4 Figure 6 As shown, the trigger member 6 includes

[0054] An outer shaft 61, one end of which is connected to the rotating member 42, and the other end of which is rotatably supported by the mounting frame 51;

[0055] A pressing plate 62, the pressing plate 62 is fixedly connected to the outer rotating shaft 61, and at least one trigger head is arranged on the pressing plate 62, and the number of the trigger heads corresponds to the number of the auxiliary switches 53;

[0056] The outer rotating shaft 61 drives the pressing plate 62 to rotate, thereby triggering the auxiliary switch 53 through the trigger head.

[0057] In this embodiment, the inner end of the outer shaft 61 is located in a quadrilateral structure, and the outer end is a circular structure. The inner end of the outer shaft 61 is inserted into the rotating member 42 to achieve synchronous rotation with the rotating member 42. In addition to the quadrilateral structure, the inner end of the outer shaft 61 can also be a spline structure.

[0058] like Figure 6 The pressing plate 62 shown is formed by bending a sheet metal part, and the outer shaft 61 directly passes through the pressing plate 62 and is fixed by welding.

[0059] Specifically, as an optional implementation in this embodiment, Figure 4As shown, the rotary seal 4 includes a mounting member 41 and a rotating member 42;

[0060] The mounting member 41 includes a cylinder 411 and an end plate 412, wherein the end plate 412 and the cylinder 411 are an integral structure; the cylinder 411 is inserted into the side plate of the box body 1 and is threadedly connected to the side plate, and a sealing ring 413 is provided on the inner side of the end plate 412 to form a sealing fit between the end plate 412 and the outer wall of the side plate;

[0061] The rotating member 42 is inserted into the cylinder 411, and a retaining ring 47 is arranged in the middle of the cylinder 411. An inner retaining plate 45 and an outer retaining plate 46 are arranged on the rotating member 42. An inner bearing 43 and an outer bearing 44 are arranged on the rotating member 42. The inner bearing 43 is located between the inner retaining plate 45 and the retaining ring 47. A sealing member 48 is arranged between the inner bearing 43 and the retaining ring 47. The outer bearing 44 is arranged between the outer retaining plate 46 and the retaining ring 47. An inner connecting cavity 421 and an outer connecting cavity 422 are arranged in the rotating member 42. The inner connecting cavity 421 is connected to the transmission shaft, and the outer connecting cavity 422 is connected to the trigger member 6.

[0062] In this embodiment, the cross-sections of the inner connecting cavity 421 and the outer connecting cavity 422 are both quadrilateral structures, and the connecting ends of the transmission shaft and the outer rotating shaft 61 that cooperate with them are also quadrilateral structures. The inner connecting cavity 421 and the outer connecting cavity 422 are not connected.

[0063] In the rotary seal 4 , the sealing performance between the mounting member 41 and the housing 1 is ensured by the seal ring 413 , and the sealing performance between the rotary member 42 and the mounting member 41 is ensured by the seal 48 .

[0064] When the rotary seal 4 is in operation, the transmission shaft of the operating mechanism 2 drives the outer shaft 61 to rotate through the rotating member 42 , and the outer shaft 61 drives the pressing plate 62 to trigger the auxiliary switch 53 .

[0065] In this embodiment, by making the box body 1 into a closed type, the three-phase arc extinguishing mechanism 3 in the box body 1 is surrounded by the inert gas in the box body, thereby reducing the creepage distance of the arc extinguishing mechanism, the phase spacing is <200mm, the vacuum bubble height is <200mm, and the insulating pull rod height is <200mm; the total height of the box body 1 is <600mm, and the total length is <600mm.

[0066] As a preferred embodiment of this embodiment, the phase spacing is 1700 mm, the vacuum bubble height is 166 mm, and the insulating pull rod height is 179 mm; the total height of the box body 1 is 593 mm and the total length is 541 mm.

[0067] The gas box type vacuum AC contactor transmission structure of the utility model improves the insulation inside the box 1 by making the box 1 airtight and filling it with sulfur hexafluoride gas, so that the vacuum bubble, phase-to-phase distance and insulating pull rod in the arc extinguishing mechanism 3 can be made smaller and shorter, and the entire box 1 can be made smaller. After the box 1 is filled with gas, it basically does not need to be opened. The wearing part auxiliary switch 53 is directly installed on the outside of the box 1, and maintenance is also very convenient.

[0068] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0069] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0071] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0072] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0074] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An air box type vacuum AC contactor transmission structure, characterized in that: include A box body (1), wherein a sealed inner cavity is provided in the box body (1), the inner cavity is filled with an inert gas, the inner cavity of the box body comprises a separated operating cavity and an arc extinguishing cavity, an operating mechanism (2) is installed in the operating cavity, and a three-phase arc extinguishing mechanism (3) is installed in the arc extinguishing cavity; A rotary seal (4) is installed on the side plate of the housing (1) for sealing, wherein the inner end of the rotary member (42) in the rotary seal is connected to the transmission shaft of the operating mechanism (2), and the outer end of the transmission shaft is connected to the trigger member (6); A power controller (52) and at least one auxiliary switch (53), wherein the power controller (52) and the auxiliary switch (53) are both mounted on the outside of the side wall of the box (1), the power controller (52) is electrically connected to the electromagnet in the operating mechanism (2) and the terminal module respectively, and the auxiliary switch (53) is electrically connected to the terminal module.

2. The air box type vacuum AC contactor transmission structure according to claim 1 is characterized in that: The power controller (52) and the auxiliary switch (53) are arranged on a mounting frame (51), and the mounting frame (51) is fixedly arranged on the outer side wall of the box body.

3. The air box type vacuum AC contactor transmission structure according to claim 2 is characterized in that: The trigger member (6) comprises An outer rotating shaft (61), one end of which is connected to the rotating member (42), and the other end of which is cooperated with the mounting frame (51) for rotation support; A pressing plate (62), the pressing plate (62) being fixedly connected to the outer rotating shaft (61), and at least one trigger head being arranged on the pressing plate (62), the number of the trigger heads corresponding to the number of the auxiliary switches (53); The outer rotating shaft (61) drives the pressing plate (62) to rotate, thereby triggering the auxiliary switch (53) through the trigger head.

4. The air box type vacuum AC contactor transmission structure according to claim 1 is characterized in that: The rotating seal (4) comprises a mounting member (41) and a rotating member (42); The mounting member (41) comprises a cylinder (411) and an end plate (412), wherein the end plate (412) and the cylinder (411) are an integral structure; the cylinder (411) is inserted into a side plate of the box body (1) and is threadedly connected to the side plate; a sealing ring (413) is provided on the inner side surface of the end plate (412) so as to form a sealing fit between the end plate (412) and the outer wall of the side plate; A rotating member (42) is inserted into a cylinder (411), a retaining ring (47) is arranged in the middle of the cylinder (411), an inner retaining plate (45) and an outer retaining plate (46) are arranged on the rotating member (42), an inner bearing (43) and an outer bearing (44) are arranged on the rotating member (42), the inner bearing (43) is located between the inner retaining plate (45) and the retaining ring (47), a sealing member (48) is arranged between the inner bearing (43) and the retaining ring (47), the outer bearing (44) is arranged between the outer retaining plate (46) and the retaining ring (47), an inner connecting cavity (421) and an outer connecting cavity (422) are arranged in the rotating member (42), the inner connecting cavity (421) is connected to a transmission shaft, and the outer connecting cavity (422) is connected to a trigger member (6).

5. The air box type vacuum AC contactor transmission structure according to claim 1 is characterized in that: In the three-phase arc extinguishing mechanism (3), the phase spacing is less than 200 mm, the vacuum bubble height is less than 200 mm, and the insulating pull rod height is less than 200 mm.

6. The air box type vacuum AC contactor transmission structure according to claim 1 is characterized in that: The total height of the box body (1) is less than 600 mm, and the total length is less than 600 mm.

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