Forward operation structure of rotary disconnecting switch

Abstract

The invention relates to a forward operation structure of a rotary disconnecting switch, which comprises a pair of conductive devices which are arranged side by side, the transmission gear is respectively meshed with the rotating shafts of the two conductive devices; the upper end of the rotating part is connected with the input shaft and rotates synchronously with the input shaft, the lower end of the rotating part is connected with the transmission gear, and a rotating idle stroke is arranged between the rotating part and the transmission gear; the rotating piece is connected with at least one energy storage mechanism in the rotating direction. When the rotating part drives the energy storage mechanism to store energy, the transmission gear can be kept in a static state, and the transmission gear is not driven, so that the rotating shaft and the moving contact in the conductive device can be kept in the opening and closing positions, and the conductive device is ensured to have the maximum opening distance.

Description

Technical Field

[0001] The invention relates to the field of low-voltage switch equipment, and in particular to a forward operation structure of a rotary isolating switch. Background Art

[0002] The rotary disconnect switch is a switchgear designed for low voltage DC applications. The rated voltage of this disconnect switch is 1500V DC and it can provide a current of 63A to 630A. It is specifically used for isolation protection in low voltage DC environments.

[0003] The rotary disconnector includes multiple conductive devices and operating mechanisms. The conductive devices include a rotating shaft and a contact system. The contact system includes a static contact and a moving contact. The moving contact is connected to the rotating shaft and rotates synchronously. When the moving contact and the static contact are in the open state, the distance between the two is called the opening distance. The size of the opening distance determines the performance of the switch.

[0004] The operating mechanism is used to control the rotation of the rotating shaft to open and close the switch. The operating mechanism mainly includes a rotating part and a pair of energy storage mechanisms. In the past, the rotating part was directly connected to the rotating shaft of the conductive device. The rotation of the rotating part will directly drive the rotating shaft and the moving contact in the conductive device to move.

[0005] The operating mechanism is divided into forward operation and lateral operation according to the position relative to the conductive device. This patent application is mainly for the forward operation structure. The problems existing in the previous forward operation structure are:

[0006] 1. The opening position of the disconnector is not fixed, and there is a risk of premature contact erosion. Specifically, when the operating mechanism controls the conductive device to close the switch through the rotating part, the rotating part needs to rotate and compress the energy storage mechanism to the dead point position first. During this period of rotation, the rotating part will directly drive the moving contact of the switch to move a certain distance toward the static contact, resulting in a smaller opening distance. The energy storage mechanism will only start to release energy after passing the dead point position. The moving contact can quickly close with the static contact during the energy storage mechanism release process.

[0007] 2. There is a problem of the moving contact following the movement during operation; specifically, in the past, the moving contact rotated synchronously with the rotating part in the operating mechanism directly through the rotating shaft of the conductive device. When the rotating part is in the open position, the energy storage mechanism cannot constrain the position of the rotating part, which results in the operator twisting the rotating part by hand to drive the moving contact in the switch to rotate at a small angle;

[0008] 3. The operating structure is unstable and the assembly is complicated. Summary of the invention

[0009] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a forward operating structure of a rotary disconnector, so as to solve the technical problem that the operating mechanism in the previous disconnector cannot lock the moving contact in the conductive device in the open and closed position, resulting in too small an opening distance in the conductive device and causing the contact to be burned and damaged.

[0010] The technical solution adopted by the present invention to solve its technical problem is:

[0011] A rotary disconnect switch forward operation structure is provided, comprising:

[0012] A pair of conductive devices, the two conductive devices are arranged side by side, the conductive devices include a rotating shaft and a contact system, the rotating shaft drives the contact system to open and close;

[0013] A transmission gear, wherein the transmission gear is meshed with the rotating shafts of the two conductive devices respectively, so that the transmission gear drives the rotating shafts of the two conductive devices to rotate synchronously;

[0014] A rotating member, the upper end of which is connected to the input shaft and rotates synchronously with the input shaft, and the lower end of which is connected to the transmission gear. A rotation idle distance is provided between the rotating member and the transmission gear, and the rotating member is suitable for driving the transmission gear to rotate; the rotating member is connected to at least one energy storage mechanism in the rotation direction;

[0015] When the rotating part rotates and drives the energy storage mechanism to reach the dead point, the rotating part completes the rotation idle stroke and begins to abut the transmission gear. When the transmission gear drives the energy storage mechanism to pass the dead point, the rotating part directly drives the two conductive devices through the transmission gear to perform opening and closing operations.

[0016] Furthermore, an end block is arranged on the rotating shaft, a row of arc-shaped external teeth is arranged on the end block, and the end block is meshed with the transmission gear through the arc-shaped external teeth.

[0017] Furthermore, a shaft connection is formed between the rotating member and the transmission gear, so that the rotating member and the transmission gear are rotationally matched;

[0018] A pair of guide blocks and guide grooves are arranged between the rotating member and the transmission gear. The guide groove is opened on the transmission gear or the rotating member. The guide block is arranged on the rotating member or the transmission gear. The guide block is located in the guide groove. The rotation distance of the guide block in the guide groove is the rotational idle stroke.

[0019] Furthermore, a torsion spring is provided between the rotating member and the transmission gear, and when the rotating member performs energy storage rotation, the torsion spring applies a torsion force to the rotating member.

[0020] Furthermore, the number of the energy storage mechanisms is two;

[0021] The two sides of the rotating member are respectively abutted against two energy storage mechanisms.

[0022] The beneficial effects of the present invention are:

[0023] The forward operation structure of the rotary disconnector of the present invention has two conductive devices arranged side by side and then driven synchronously by a transmission gear in the middle, and a rotational idle stroke is provided between the rotating member and the transmission gear. By utilizing the rotational idle stroke, the transmission gear can remain in a stationary state when the rotating member drives the energy storage mechanism to store energy. The transmission gear is not driven, which ensures that the rotating shaft and the moving contact in the conductive device can remain in the opening and closing positions, ensuring that the conductive device has a maximum opening distance.

[0024] The energy storage mechanism starts to release energy after passing the dead point position. During the energy release process, the moving contact is driven to rotate quickly from the open position to the cooperative position directly through the rotating parts, transmission gears and rotating shafts, thereby improving the overall performance of the disconnector.

[0025] By arranging the torsion spring between the transmission gear and the rotating member, the input shaft can be prevented from loosening when it is in the initial position of opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the forward operation structure of the rotary isolating switch of the present invention;

[0028] Figure 2 It is a schematic diagram of two conductive devices arranged side by side;

[0029] Figure 3 It is a schematic diagram of the forward operation structure of the rotary disconnector of the present invention in the open state;

[0030] Figure 4 It is a schematic diagram of the forward operation structure of the rotary disconnector of the present invention in a closed state;

[0031] Figure 5 It is a schematic diagram of transmission gear;

[0032] Figure 6 is a schematic diagram of a rotating part;

[0033] Figure 7 It is a schematic diagram of the input shaft, rotating parts and transmission gears;

[0034] in,

[0035] 1. conductive device, 11. rotating shaft, 12. moving contact, 13. stationary contact, 14. housing;

[0036] 2. transmission gear, 21. shaft hole, 22. guide groove, 23. torsion spring;

[0037] 3. rotating member, 31. mounting shaft, 32. guide block, 33. clamping block, 34. abutting column;

[0038] 4. Input shaft;

[0039] 5. energy storage mechanism, 6. end block, 61. external teeth;

[0040] 7. Shell. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present application provides a forward operation structure of a rotary disconnector, which is described in detail below. It should be noted that the description order of the following embodiments does not limit 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.

[0043] In order to solve the technical problem that the operating mechanism in the isolating switch in the prior art cannot lock the moving contact 12 in the conductive device 1 in the open and closed positions, resulting in too small an opening distance in the conductive device 1 and ablation damage of the contact, an embodiment of the present application provides a forward operation structure of a rotary isolating switch, which is described in detail below.

[0044] like Figures 1 to 7 As shown, a forward operation structure of a rotary isolating switch includes

[0045] A pair of conductive devices 1, the two conductive devices 1 are arranged side by side, the conductive devices 1 include a rotating shaft 11 and a contact system, the rotating shaft 11 drives the contact system 12 to open and close;

[0046] A transmission gear 2, wherein the transmission gear 2 is meshed with the rotating shafts 11 of the two conductive devices 1 respectively, so that the transmission gear 2 drives the rotating shafts 11 of the two conductive devices 1 to rotate synchronously;

[0047] The rotating member 3 has an upper end connected to the input shaft 4 and rotates synchronously with the input shaft 4, and a lower end connected to the transmission gear 2. A rotational idle motion is provided between the rotating member 3 and the transmission gear 2, and the rotating member 3 is suitable for driving the transmission gear 2 to rotate; the rotating member 3 is connected to at least one energy storage mechanism 5 in the rotation direction.

[0048] The conductive device 1 includes a housing 14, an arc extinguishing system, a pair of static contacts 13, a rotating shaft 11 and a moving contact 12; the arc extinguishing system and the static contact 13 are fixedly installed in the housing 14, the rotating shaft 11 is rotatably arranged in the housing 14, the moving contact 12 is installed on the rotating shaft 11, and the rotating shaft 11 drives the moving contact 12 to reciprocate between the open position and the closed position, so that the conductive device 1 can realize power on and off.

[0049] In the conductive device 1 , the movable contact 12 rotates at an angle of 90° between the open position and the closed position.

[0050] Specifically, as an optional implementation in this embodiment, Figure 3 and Figure 4 As shown, the end block 6 is disposed on the rotating shaft 11 , and a row of arc-shaped external teeth 61 is disposed on the end block 6 . The end block 6 is meshed with the transmission gear 2 through the arc-shaped external teeth 61 .

[0051] In this embodiment, the end block 6 is an arc-shaped member, and an outer wall thereof is provided with external teeth 61 . The end block 6 and the rotating shaft 11 are an integral structure.

[0052] Specifically, as an optional implementation in this embodiment, Figure 5 , Figure 6 and Figure 7 As shown, the rotating member 3 and the transmission gear 2 form an axial connection so that the rotating member 3 and the transmission gear 2 can be rotated together;

[0053] A pair of guide blocks 32 and guide grooves 22 are arranged between the rotating member 3 and the transmission gear 2. The guide grooves 22 are opened on the transmission gear 2. The guide blocks 32 are arranged on the rotating member 3. The guide blocks 32 are located in the guide grooves 22. The rotation distance of the guide blocks 32 in the guide grooves 22 is the rotational idle stroke.

[0054] Similarly, the guide groove 22 can also be opened on the rotating member 3 , and the guide block 32 is arranged on the transmission gear 2 .

[0055] In this embodiment, a mounting shaft 31 is provided at the lower end of the rotating member 3, and an axial hole 21 is provided in the middle of the transmission gear 2. The mounting shaft 31 is inserted into the axial hole 21, so that the rotating member 3 and the transmission gear 2 form a rotational fit, and then a guide block 32 is provided between the rotating member 3 and the transmission gear 2, so that the rotating member 3 can drive the transmission gear 2 to rotate through the guide block 32 after completing the rotational idle stroke.

[0056] Specifically, as an optional implementation in this embodiment, Figure 5 As shown, a torsion spring 23 is provided between the rotating member 3 and the transmission gear 2 . When the rotating member 3 performs energy storage rotation, the torsion spring 23 applies a torsion force to the rotating member 3 .

[0057] If there is no torsion spring 23, the position of the rotating member 3 can only be constrained by the energy storage mechanism 5. However, the energy storage spring in the energy storage mechanism 5 is a large spring. When the rotating member 3 is in the opening and closing position, the rotating member 3 has a certain movement gap relative to the energy storage mechanism 5, which also makes the rotating member 3 have a certain rotation space. The input shaft 4 is fixed on the rotating member 3, which also causes the input shaft 4 to rotate by a certain small angle. In order to avoid such small-angle rotation, a torsion spring 23 is added. The torsion spring 23 can ensure that there is a certain torque between the rotating member 3 and the transmission gear 2, so that the rotating member 3 will not loosen in the opening and closing position.

[0058] Correspondingly, an annular groove is provided on the transmission gear 2 , and the torsion spring 23 is installed in the annular groove.

[0059] In this embodiment, the operating mechanism is equipped with a housing, and the energy storage mechanism 5 , the rotating member 3 , the input shaft 4 , and the transmission gear 2 are all installed in the housing, and the housing is fixed on the two conductive devices 1 .

[0060] In order to facilitate installation of various components into the housing, the housing is designed to be an upper housing and a lower housing, and the upper housing and the lower housing are locked and connected by bolts.

[0061] The transmission gear 2 is in rotational fit with the lower shell, so that it can stably rotate in the outer shell. The input shaft 4 passes through the upper shell and is in rotational fit with the upper shell.

[0062] A square hole is provided at the upper end of the input shaft 4 , and the square hole cooperates with a handle to facilitate an operator to operate the input shaft 4 to rotate.

[0063] Specifically, as an optional implementation in this embodiment, Figure 3 and Figure 4 As shown, there are two energy storage mechanisms 5 ; two sides of the rotating member 3 are respectively abutted against two energy storage mechanisms 5 .

[0064] The energy storage mechanism 5 includes an energy storage spring and two end seats. The energy storage spring abuts against the housing through one end seat and abuts against the rotating member 3 through the other end seat.

[0065] A pair of abutment posts 34 are provided on the rotating member 3 , and the abutment posts 34 are used for abutting and cooperating with the end seats of the energy storage mechanism 5 .

[0066] In this embodiment, the input shaft 4 is clamped with the rotating member 3. Specifically, a pair of clamping grooves and clamping blocks 33 are provided between the input shaft 4 and the rotating member 3. The clamping grooves are provided on the input shaft 4, and the clamping blocks 33 are provided on the rotating member 3. The clamping blocks 33 and the clamping grooves are clamped with the input shaft 4 and the rotating member 3, so that the input shaft 4 drives the rotating member 3 to rotate synchronously.

[0067] The working principle of the forward operation structure of the rotary isolating switch of the present invention is as follows:

[0068] By adding a transmission gear 2 between the rotating member 3 and the conductive device 1, and providing a rotation gap between the transmission gear 2 and the rotating member 3, after such a design, when the switch needs to be switched from power-off to power-on, the rotating member 3 needs to rotate from the open position to the closed position, and the rotating member 3 first drives the energy storage mechanism 5 to start energy storage. Before the energy storage mechanism 5 reaches the dead point, the guide block 32 of the rotating member 3 moves in the guide groove 22. When the energy storage mechanism 5 reaches the dead point, the guide block 32 abuts against the transmission gear 2, and then the energy storage mechanism 5 starts to release energy quickly after passing the dead point. During the energy release process, the energy storage mechanism 5 drives the moving contact 12 to quickly switch from the open position to the closed position through the rotating member 3, the transmission gear 2, and the rotating shaft 11. Even if the moving contact 12 contacts the static contact 13, the isolating switch is energized.

[0069] The process of switching the isolating switch from power on to power off is the same as the above principle, and the rotating member 3 can be rotated in the reverse direction.

[0070] The dead point position of the energy storage mechanism 5 means that when the rotating member 3 drives the energy storage mechanism 5 to store energy, the center of the rotating member 3 and the energy storage spring are in the same straight line, that is, a three-point-one-line state. At this time, the energy storage mechanism 5 is in the dead point position. As long as the rotating member 3 continues to rotate past the three-point-one-line position, the energy storage spring starts to release energy.

[0071] The forward operation structure of the rotary isolating switch of the present invention is simple and reliable in structure. It only adds a transmission gear 2 between the rotating member 3 and the switch shaft 11. The structural change is minor and the operation is stable and reliable.

[0072] 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.

[0073] 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 an indirect connection 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] In addition, each functional unit in each embodiment of the present invention 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.

[0078] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A forward operation structure of a rotary isolating switch, Its characteristics are: include A pair of conductive devices (1), the two conductive devices (1) are arranged side by side, the conductive devices (1) comprise a rotating shaft (11) and a contact system, the rotating shaft (11) drives the contact system (12) to open and close the switch; A transmission gear (2), wherein the transmission gear (2) is respectively meshed with the rotating shafts (11) of the two conductive devices (1), so that the transmission gear (2) drives the rotating shafts (11) of the two conductive devices (1) to rotate synchronously; A rotating member (3), the upper end of which is connected to the input shaft (4) and rotates synchronously with the input shaft (4), and the lower end of which is connected to the transmission gear (2), a rotation idle distance is provided between the rotating member (3) and the transmission gear (2), and the rotating member (3) is suitable for driving the transmission gear (2) to rotate; the rotating member (3) is connected to at least one energy storage mechanism (5) in the rotation direction; When the rotating member (3) rotates and drives the energy storage mechanism (5) to reach the dead point position, the rotating member (3) completes the rotation idle stroke and begins to abut against the transmission gear (2). When the transmission gear (2) drives the energy storage mechanism (5) to pass the dead point position, the rotating member (3) directly drives the two conductive devices (1) to perform opening and closing operations through the transmission gear (2).

2. The forward operation structure of the rotary isolating switch according to claim 1, Its characteristics are: An end block (6) is arranged on the rotating shaft (11), a row of arc-shaped external teeth (61) is arranged on the end block (6), and the end block (6) is meshed with the transmission gear (2) via the arc-shaped external teeth (61).

3. The forward operation structure of the rotary isolating switch according to claim 1, Its characteristics are: The rotating member (3) and the transmission gear (2) are connected by an axial connection so that the rotating member (3) and the transmission gear (2) can be rotated together; A pair of guide blocks (32) and a guide groove (22) are arranged between the rotating member (3) and the transmission gear (2); the guide groove (22) is opened on the transmission gear (2) or the rotating member (3); the guide block (32) is arranged on the rotating member (3) or the transmission gear (2); the guide block (32) is located in the guide groove (22); and the rotation distance of the guide block (32) in the guide groove (22) is the rotation idle stroke.

4. The forward operation structure of the rotary disconnect switch according to claim 3, Its characteristics are: A torsion spring (23) is provided between the rotating member (3) and the transmission gear (2). When the rotating member (3) performs energy storage rotation, the torsion spring (23) applies a torsion force to the rotating member (3).

5. The forward operation structure of the rotary disconnector according to claim 3, Its characteristics are: The number of the energy storage mechanisms (5) is two; The two sides of the rotating member (3) are respectively in contact with two energy storage mechanisms (5).

6. The forward operation structure of the rotary disconnector according to claim 3, Its characteristics are: The input shaft (4) and the rotating member (3) are clamped together.

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