Three-phase moving contact mechanical interlocking transmission system for three-station disconnecting switch

Abstract

The utility model discloses a three-phase moving contact mechanical interlocking transmission system for a three-station isolating switch, which belongs to the field of three-station isolating switches and comprises a transmission assembly with three transmission ends respectively connected with an A-phase sliding contact, a B-phase sliding contact and a C-phase sliding contact. The driving end of the transmission assembly is only connected with one driving source; according to the system, one driving source is designed to drive the whole transmission assembly, so that the system has the mechanical logic locking capability, the synchronism of the three-phase moving contacts in the switching process is remarkably improved, and compared with the traditional design of multiple driving sources, the single driving source can ensure that all the moving contacts start and end movement at the same time point, so that the reliability of the system is improved. Therefore, the problem that the reliability of phase sequence switching cannot be guaranteed due to asynchronization is avoided. The system is simple in structure and principle and convenient to implement, operate and maintain, and has good popularization and application value.

Description

Technical Field

[0001] The utility model belongs to the field of three-position disconnectors, and particularly relates to a three-phase moving contact mechanical interlocking transmission system for a three-position disconnector. Background Art

[0002] At present, in order to meet the reverse control of a generator motor to realize the switching between the power generation working state and the electric working state, those skilled in the art have developed a new type of three-position disconnector capable of changing the power supply phase sequence; specifically as Figure 1 shown in FIG. -3, Figure 1 For the power generation condition, the A-phase moving contact is in the lower position, the A-phase is in the closed position, the B-phase moving contact is in the upper position, and the C-phase moving contact is in the lower position. The current flow is as Figure 1 shown; Figure 2 For the isolation condition, all three phases are in the open state. Figure 3 In [figure number not provided], the A-phase moving contact is in the closed position, the original B-phase moving contact moves downward, and the original C-phase moving contact moves upward. The current flow is as shown in FIG. 3, realizing the conversion of the B and C phases; as Figure 1 shown, when the generator motor is in the power generation condition, the current flows out through the three-position disconnector via A-A, B-B, C-C; as Figure 3 shown, when the generator motor is in the pumping condition, the current flows out through the three-position disconnector via A-A, C-B, C-B, realizing the conversion of the phase sequence of the B and C phases.

[0003] It can be seen that the new type of three-position disconnector can meet the switching of the three conditions of the open circuit condition, the power generation condition and the electric condition of the generator motor by switching the power supply phase sequence; in order to ensure the reliability of the switching, higher requirements are put forward for the transmission system; because during the switching process, the moving contact corresponding to each phase has to move, and it must meet the requirements of simultaneous opening and closing; the existing transmission mechanism generally uses multiple drive sources, and the drive sources drive their respective moving contacts to move through the corresponding transmission structures; however, it is difficult to ensure precise synchronization of multiple drive sources, resulting in the inability to ensure the reliability of the phase sequence switching of the three-position disconnector.

[0004] It can be seen that the existing transmission system usually uses multiple drive sources to independently control the corresponding transmission components to complete the transmission, which is difficult to ensure the synchronization of opening and closing, resulting in poor reliability of the phase sequence switching of the three-position disconnector. Summary of the Utility Model

[0005] To overcome the above technical deficiencies, the present utility model provides a three-phase moving contact mechanical interlocking transmission system for a three-position disconnector, which can solve the technical problems that the existing transmission systems usually adopt multiple drive sources to independently control the corresponding transmission components to complete the transmission, it is difficult to ensure the synchronization of opening and closing, resulting in poor reliability of phase sequence switching of the three-position disconnector.

[0006] To achieve the above object, the present utility model adopts the following technical content:

[0007] A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector, characterized in that it includes a transmission component, and only one drive source is connected to the drive end of the transmission component;

[0008] The first transmission end of the transmission component is connected to the A-phase sliding contact, the second transmission end is connected to the B-phase sliding contact, and the third transmission end is connected to the C-phase sliding contact;

[0009] When the three-position disconnector is in the isolation state, the A-phase sliding contact, the B-phase sliding contact of the second transmission end and the C-phase sliding contact are located in the first conductors corresponding to each phase, and the internal conductors of each phase are in a disconnected state;

[0010] When the three-position disconnector is switched to the power generation state, the drive source starts forward, drives the A-phase sliding contact through the first transmission end to conduct the A-phase first conductor and the A-phase second conductor; drives the B-phase sliding contact through the second transmission end to conduct the B-phase first conductor and the B-phase third conductor; drives the C-phase sliding contact through the third transmission end to conduct the C-phase first conductor and the C-phase second conductor;

[0011] When the three-position disconnector is switched to the pumping state, the drive source starts in reverse, drives the A-phase sliding contact through the first transmission end to conduct the A-phase first conductor and the A-phase second conductor; drives the B-phase sliding contact through the second transmission end to conduct the B-phase first conductor and the C-phase second conductor; drives the C-phase sliding contact through the third transmission end to conduct the C-phase first conductor and the B-phase third conductor.

[0012] Further, the transmission component includes a drive rack connected to the drive source;

[0013] One end of the drive rack meshes with a first gear, and the other end meshes with a second gear;

[0014] The first gear is sequentially and movably connected with a second drive link and a first drive link from bottom to top, and the first drive link is movably connected with the A-phase sliding contact;

[0015] A fourth drive link is fixedly connected to the second gear and is located in the middle of the fourth drive link;

[0016] One end of the fourth driving link is movably connected to the B-phase sliding contact, and the other end is movably connected to the C-phase sliding contact.

[0017] Further, one end of the fourth driving link is movably connected to the third driving link, and the top end of the third driving link is movably connected to the B-phase sliding contact.

[0018] Further, the other end of the fourth driving link is movably connected to the fifth driving link, and the top end of the fifth driving link is movably connected to the C-phase sliding contact.

[0019] Further, when the three-position disconnecting switch is in the isolating state, the second driving link and the first driving link are in a straight line, and the fourth driving link is parallel to the driving rack.

[0020] Further, the transmission assembly includes a first driving shaft, a second driving shaft, a third driving shaft, a fourth driving shaft and a fifth driving shaft; the output end of the driving source is connected to any one of the first driving shaft, the second driving shaft and the third driving shaft;

[0021] One end of the first driving shaft is connected with a sixth bevel gear, and the other end is movably connected to the A-phase sliding contact;

[0022] One end of the second driving shaft is connected with a seventh bevel gear, and the other end is movably connected to the B-phase sliding contact;

[0023] One end of the third driving shaft is connected with an eighth bevel gear, and the other end is movably connected to the C-phase sliding contact;

[0024] The sixth bevel gear and the seventh bevel gear are connected by the fourth driving shaft; one end of the fourth driving shaft is sleeved with a first bevel gear and a second bevel gear;

[0025] The first bevel gear and the second bevel gear are meshed on both sides of the sixth bevel gear. Both the first bevel gear and the second bevel gear are semi-gears, and their teeth are symmetrically arranged with the sixth bevel gear as the center;

[0026] The seventh bevel gear and the eighth bevel gear are connected by the fifth driving shaft.

[0027] Further, the other end of the fourth driving shaft is sleeved with a third bevel gear, and the third bevel gear is meshed with the seventh bevel gear.

[0028] Further, one end of the fifth driving shaft is connected with a fourth bevel gear, and the fourth bevel gear is meshed with the seventh bevel gear; the other end of the fifth driving shaft is connected with a fifth bevel gear, and the fifth bevel gear is meshed with the eighth bevel gear.

[0029] Further, the first drive shaft is sequentially and movably connected to an eighth connecting rod, a seventh connecting rod, and a sixth connecting rod, and the sixth connecting rod is connected to the A-phase sliding contact;

[0030] The second drive shaft is sequentially and movably connected to an eleventh connecting rod, a tenth connecting rod, and a ninth connecting rod, and the ninth connecting rod is connected to the B-phase sliding contact;

[0031] The third drive shaft is sequentially and movably connected to a fourteenth connecting rod, a thirteenth connecting rod, and a twelfth connecting rod, and the twelfth connecting rod is connected to the C-phase sliding contact.

[0032] Further, the eighth connecting rod, the seventh connecting rod, and the sixth connecting rod are connected by a shaft pin; the eleventh connecting rod, the tenth connecting rod, and the ninth connecting rod are connected by a shaft pin; the fourteenth connecting rod, the thirteenth connecting rod, and the twelfth connecting rod are connected by a shaft pin.

[0033] Compared with the prior art, the utility model has the following beneficial effects:

[0034] The utility model provides a three-phase moving contact mechanical interlock drive system for a three-position disconnecting switch. The system includes a drive assembly with three drive ends, and the three drive ends are respectively connected to an A-phase sliding contact, a B-phase sliding contact, and a C-phase sliding contact. The drive end of the drive assembly is only connected to one drive source; by designing one drive source to drive the entire drive assembly, the system has the mechanical logic locking ability, significantly improving the synchronization of the three-phase moving contacts during the switching process. Compared with the traditional design of multiple drive sources, a single drive source can ensure that all moving contacts start and end moving at the same time point, thus avoiding the problem that the reliability of phase sequence switching cannot be guaranteed due to non-synchronization; the structure and principle of the system are simple, facilitating implementation and operation and maintenance, and having good popularization and application value.

[0035] Preferably, in the present utility model, the transmission assembly adopts a driving rack connected to a driving source. The two ends of the driving rack are respectively engaged with a first gear and a second gear. When the driving source is started, it drives the driving rack to move leftward, thereby driving the first gear and the second gear to move rightward. Then, it drives the A-phase sliding contact to move downward through the second driving link and the first driving link respectively; drives the fourth driving link to be high on the left and low on the right, and then drives the B-phase sliding contact to move upward through the third driving link, and drives the C-phase sliding contact to move downward through the fifth driving link; enables the A-phase first conductor and the A-phase second conductor to be conducted; the B-phase first conductor and the B-phase third conductor to be conducted; the C-phase first conductor and the C-phase second conductor to be conducted, completing the switching of the power generation state; when the driving source starts in the reverse direction, the driving rack moves rightward; thereby driving the first gear and the second gear to move leftward, and then driving the A-phase sliding contact to move downward through the second driving link and the first driving link respectively; drives the fourth driving link to be low on the left and high on the right, and then drives the B-phase sliding contact to move downward through the third driving link, and drives the C-phase sliding contact to move upward through the fifth driving link; enables the A-phase first conductor and the A-phase second conductor to be conducted, the B-phase first conductor and the C-phase second conductor to be conducted, and the C-phase first conductor and the B-phase third conductor to be conducted; by using the meshing transmission of the driving rack with the first gear and the second gear, the efficient transmission of power is realized; thus making the system simple and effective, ensuring the accurate distribution and transmission of power, and enabling the three-phase moving contacts to move accurately and synchronously.

[0036] Further preferably, in the present utility model, in the isolated state, by ensuring that the second driving link and the first driving link are in a straight line, and the fourth driving link is parallel to the driving rack, the initial state of the transmission system is optimized, providing a good foundation for subsequent switching actions. In this way, it helps to reduce the impact and vibration during the switching process, and improve the stability and service life of the system.

[0037] Preferably, in the present utility model, the transmission assembly includes multiple drive shafts. Any one of the first drive shaft, the second drive shaft, and the third drive shaft is connected to the driving source and is respectively connected to the corresponding sliding contact. Two half gears are engaged on the sixth bevel gear connected to the first drive shaft, and the teeth of the two gears are symmetrically arranged with the sixth bevel gear as the center. In this way, when the drive shaft rotates clockwise and counterclockwise, the stroke direction of the A-phase sliding contact is the same, realizing the reciprocating movement of the A-phase sliding contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of a three-position disconnector under the power generation condition provided by the present utility model;

[0039] Figure 2 It is a schematic diagram of a three-position disconnector under the isolated condition provided by the present utility model;

[0040] Figure 3 Schematic diagram of a three - position disconnector under pumping conditions provided by the present utility model;

[0041] Figure 4 Schematic structural diagram of a three - phase moving contact mechanical interlock drive system for a three - position disconnector provided by an embodiment of the present utility model;

[0042] Figure 5 Schematic diagram of a three - phase moving contact mechanical interlock drive system for a three - position disconnector under isolation conditions provided by an embodiment of the present utility model;

[0043] Figure 6 Schematic diagram of a three - phase moving contact mechanical interlock drive system for a three - position disconnector under power generation conditions provided by an embodiment of the present utility model;

[0044] Figure 7 Schematic diagram of a three - phase moving contact mechanical interlock drive system for a three - position disconnector under pumping conditions provided by an embodiment of the present utility model;

[0045] Figure 8 Another schematic structural diagram of a three - phase moving contact mechanical interlock drive system for a three - position disconnector provided by an embodiment of the present utility model;

[0046] Figure 9 Side view of another three - phase moving contact mechanical interlock drive system for a three - position disconnector provided by an embodiment of the present utility model;

[0047] Figure 10 Static contact seat of the phase - changing switch provided by an embodiment of the present utility model;

[0048] Figure 11 Schematic diagram of the connection between another three - phase moving contact mechanical interlock drive system for a three - position disconnector and the sliding contact provided by an embodiment of the present utility model;

[0049] Figure 12 Schematic diagram of another three - phase moving contact mechanical interlock drive system for a three - position disconnector under isolation conditions provided by an embodiment of the present utility model;

[0050] Figure 13 Schematic diagram of another three - phase moving contact mechanical interlock drive system for a three - position disconnector under power generation conditions provided by an embodiment of the present utility model;

[0051] Figure 14 Schematic diagram of another three - phase moving contact mechanical interlock drive system for a three - position disconnector under pumping conditions provided by an embodiment of the present utility model;

[0052] Figure 15Schematic diagram of the reciprocating structure of the bevel gear of another three-station disconnector three-phase moving contact mechanical interlocking drive system provided by the embodiment of the present utility model.

[0053] Reference numerals:

[0054] Moving contact - 1; driving rack - 2; first gear - 3; second gear - 4; first driving link - 5; second driving link - 6; third driving link - 7; fourth driving link - 8; fifth driving link - 9; phase A sliding contact - 10; phase B sliding contact - 11; phase C sliding contact - 12;

[0055] First driving shaft - 101; second driving shaft - 102; third driving shaft - 103; fourth driving shaft - 104; fifth driving shaft - 105; first bevel gear - 106; second bevel gear - 107; third bevel gear - 108; fourth bevel gear - 109; fifth bevel gear - 110; sixth bevel gear - 111; seventh bevel gear - 112; eighth bevel gear 113; sixth link - 119; seventh link - 120; eighth link - 121; ninth link - 122; tenth link - 123; eleventh link - 124; twelfth link - 125; thirteenth link - 126; fourteenth link - 127; first pin - 128; second pin - 129; third pin - 130; fourth pin - 131; fifth pin - 132; sixth pin - 133; first phase A static contact seat - 134; second phase A static contact seat - 135; first phase B static contact seat - 136; second phase B static contact seat - 137; third phase B static contact seat - 138; first phase C static contact seat - 139; second phase C static contact seat - 140; third phase C static contact seat - 141; three-phase moving contact mechanical interlocking drive system - 142. Detailed implementation manners

[0056] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the following specific embodiments are used to further elaborate on the present utility model in detail. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0058] Accordingly, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0059] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0060] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0061] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0062] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they 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, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0063] The following further describes the present utility model in detail with reference to the drawings:

[0064] Embodiment 1

[0065] As mentioned in the background art, during the switching process of a three-position disconnector, the corresponding moving contacts of each phase need to move and must satisfy simultaneous closing and opening. Existing drive mechanisms generally use multiple drive sources, and the drive sources drive their respective moving contacts to move through corresponding drive structures. However, it is difficult for multiple drive sources to ensure precise synchronization, resulting in the inability to guarantee the reliability of the phase sequence switching of the three-position disconnector.

[0066] Specifically, as Figure 1 shown in Fig. -3, Figure 1 in the power generation condition, the moving contact 1 of phase A is in the lower position, phase A is in the closed position, the moving contact 1 of phase B is in the upper position, and the moving contact 1 of phase C is in the lower position. The current flow is as Figure 1 shown; Figure 2 in the isolation condition, all three phases are in the open state. Figure 3 In [figure number not provided], the moving contact 1 of phase A is in the closed position, the original moving contact 1 of phase B moves downward, and the original moving contact 1 of phase C moves upward. The current flow is as shown in Fig. 3, realizing the conversion of phases B and C; as Figure 1 shown, when the power generation motor is in the power generation condition, the current flows out through the three-position disconnector via A - A, B - B, C - C; as Figure 3 shown, when the power generation motor is in the pumping condition, the current flows out through the three-position disconnector via A - A, C - B, C - B, realizing the conversion of the phase sequence of phases B and C.

[0067] To achieve the above object, this embodiment provides a three-phase moving contact mechanical interlock drive system for a three-position disconnector, which can realize the synchronous movement of three moving contacts by using only one drive source, and further realize the switching between three working conditions. This drive system ensures the synchronism of closing and opening, and thus ensures the reliability of the phase sequence switching of the three-position disconnector.

[0068] As Figure 4 shown, this embodiment provides a three-phase moving contact mechanical interlock drive system for a three-position disconnector, including a drive rack 2, a first gear 3, a second gear 4, a first drive link 5, a second drive link 6, a third drive link 7, a fourth drive link 8, a fifth drive link 9, a phase A sliding contact 10, a phase B sliding contact 11, and a phase C sliding contact 12.

[0069] In this embodiment, the only drive source is connected to the drive rack 2 to control the left and right movement of the drive rack 2. The drive source can be a motor. Starting the drive source drives the drive rack 2 to move left and right. The left end of the drive rack 2 meshes with the first gear 3, and the right end meshes with the second gear 4.

[0070] In this embodiment, the A-phase sliding contact 10, B-phase sliding contact 11, and C-phase sliding contact 12 are cylindrical. There is a crossbeam in the cylinder, and there are round holes on it through which they can be connected to the driving connecting rod by pins to form a rotating pair.

[0071] The first driving connecting rod 5 has round holes at both ends. One end is connected to the A-phase sliding contact 10 to form a rotating pair, and the other end is connected to one end of the second driving connecting rod 6 to form a rotating pair.

[0072] The second driving connecting rod 6 has a round hole at one end and is connected to the first driving connecting rod 5 to form a rotating pair. The other end is fixedly connected to the center of the first gear 3.

[0073] The third driving connecting rod 7 has round holes at both ends. One end is connected to the B-phase sliding contact 11 to form a rotating pair, and the other end is connected to one end of the fourth driving connecting rod 8 to form a rotating pair.

[0074] The fourth driving connecting rod 8 has two round holes at both ends, and the middle of the connecting rod is fixedly connected to the second gear 4.

[0075] The fifth driving connecting rod 9 has round holes at both ends. One end is connected to the C-phase sliding contact 12 to form a rotating pair, and the other end is connected to one end of the fourth driving connecting rod 8 to form a rotating pair.

[0076] In this embodiment, both the first gear 3 and the second gear 4 rotate around their own centers.

[0077] The driving rack, as the active part of the contact motion system, is driven by other driving parts and moves in the horizontal direction at the illustrated position. The driving gears 1 and 2 rotate around their geometric centers respectively.

[0078] The contact transmission system adopts a mechanical interlock system. The ABC three-phase sliding contacts have three position states. The first is the isolation state, and the structure is as Figure 5 shown. The driving connecting rod 1 and the driving connecting rod 2 form a straight line. The driving connecting rod 3 and the driving connecting rod 4 are perpendicular, and the driving connecting rod 5 and the driving connecting rod 4 are perpendicular. The structure is as Figure 7 shown. At this time, the A-phase sliding contact is in the lower conductor of the A-phase, the B-phase sliding contact is in the middle conductor of the B-phase, and the C-phase sliding contact is in the middle conductor of the C-phase.

[0079] As Figure 6As shown, when changing from the isolation state to the power generation state, the driving device (driving source) moves the driving rack 2 horizontally to the left. The first gear 3 and the second gear 4 rotate clockwise. The second driving link 6 drives the first driving link 5 to move, and the fourth driving link 8 drives the third driving link 7 and the fifth driving link 9 to move, driving the A-phase sliding contact 10 to move downward, the B-phase sliding contact 11 to move upward, and the C-phase sliding contact 12 to move downward. The A-phase sliding contact 10 is between the upper conductor of the A phase (the first conductor of the A phase) and the lower conductor of the A phase (the second conductor of the A phase), electrically connecting the lower conductor and the upper conductor of the A phase. The B-phase sliding contact 11 is between the upper conductor of the B phase (the third conductor of the B phase) and the middle conductor of the B phase (the first conductor of the B phase), and the upper conductor and the middle conductor of the B phase conduct current. The external current flows in from the incoming flange of the B phase and out from the outgoing flange of the B phase; the C-phase sliding contact is between the lower conductor of the C phase (the second conductor of the C phase) and the middle conductor of the C phase (the first conductor of the C phase), and the lower conductor and the middle conductor of the C phase conduct current. The external current flows in from the incoming flange of the C phase and out from the outgoing flange of the C phase.

[0080] As Figure 7 shown, the structure when changing from the isolation state to the pumping state; the driving device moves the rack horizontally to the right. The first gear 3 and the second gear 4 rotate counterclockwise. The second driving link 6 drives the first driving link 5 to move, and the fourth driving link 8 drives the third driving link 7 and the fifth driving link 9 to move, driving the A-phase sliding contact 10 to move downward, the B-phase sliding contact 11 to move downward, and the C-phase sliding contact 12 to move downward. The A-phase sliding contact 10 is between the upper conductor and the lower conductor of the A phase, electrically connecting the lower conductor and the upper conductor of the A phase. The B-phase sliding contact 11 is between the lower conductor and the middle conductor of the B phase, and the lower conductor and the middle conductor of the B phase conduct current. The external current flows in from the outgoing flange of the C phase and out from the incoming flange of the B phase; the C-phase sliding contact 12 is between the upper conductor of the B phase and the middle conductor of the C phase, and the upper conductor of the B phase and the middle conductor of the C phase can conduct current. The external current flows in from the outgoing flange of the B phase and out from the incoming flange of the C phase.

[0081] As Figure 5 shown, in the isolation state, the first driving link 5 and the second driving link 6 form a straight line, the third driving link 7 and the fourth driving link 8 are perpendicular, and the fifth driving link 9 and the fourth driving link 8 are perpendicular. As Figure 5 shown. At this time, the A-phase sliding contact 10 is inside the upper conductor of the A phase, the B-phase sliding contact 11 is inside the middle conductor of the B phase, and the C-phase sliding contact 12 is inside the middle conductor of the C phase.

[0082] It can be seen that this transmission system realizes the efficient transmission of power by using the meshing transmission of the driving rack 2 with the first gear 3 and the second gear 4; this makes the system simple and effective, and can ensure the accurate distribution and transmission of power, enabling the three-phase moving contacts to move accurately and synchronously.

[0083] Embodiment 2

[0084] As Figure 8 and Figure 11 shown, this embodiment provides another mechanical interlock transmission system 142 for the three-phase moving contacts of a three-position disconnector. As Figure 9 shown, it specifically includes a first drive shaft 101, a second drive shaft 102, a third drive shaft 103, a fourth drive shaft 104, a fifth drive shaft 105, a first bevel gear 106, a second bevel gear 107, a third bevel gear 108, a fourth bevel gear 109, a fifth bevel gear 110, a sixth bevel gear 111, a seventh bevel gear 112, an eighth bevel gear 113, a sixth connecting rod 119, a seventh connecting rod 120, an eighth connecting rod 121, a ninth connecting rod 122, a tenth connecting rod 123, an eleventh connecting rod 124, a twelfth connecting rod 125, a thirteenth connecting rod 126, a fourteenth connecting rod 127, a first pin 128, a second pin 129, a third pin 130, a fourth pin 131, a fifth pin 132, a sixth pin 133, a first static contact seat 134 for phase A, a second static contact seat 135 for phase A, a first static contact seat 136 for phase B, a second static contact seat 137 for phase B, a third static contact seat 138 for phase B, a first static contact seat 139 for phase C, a second static contact seat 140 for phase C, a third static contact seat 141 for phase C, a sliding contact 10 for phase A, a sliding contact 11 for phase B, and a sliding contact 12 for phase C.

[0085] In this embodiment, as Figure 10 shown, the upper conductor and lower conductor of phase A, the upper conductor, middle conductor and lower conductor of phase B, and the upper conductor, middle conductor and lower conductor of phase C in Embodiment 1 are simplified to a first static contact seat 134 for phase A, a second static contact seat 135 for phase A, a first static contact seat 136 for phase B, a second static contact seat 137 for phase B, a third static contact seat 138 for phase B, a first static contact seat 139 for phase C, a second static contact seat 140 for phase C, and a third static contact seat 141 for phase C; among them, the third static contact seat 138 for phase B is connected to the third static contact seat 141 for phase C, and the second static contact seat 137 for phase B is connected to the second static contact seat 140 for phase C.

[0086] Similarly, the transmission system of this embodiment can complete the switching of the three working conditions of the entire commutation switch by only connecting to the same driving source; the specific working conditions are as Figure 12 , Figure 13 and Figure 14 shown.

[0087] Also, asFigure 8 and Figure 9 As shown, in this embodiment, the specific structural relationship is as follows:

[0088] The A-phase sliding contact 10 is cylindrical and fixed to the sixth connecting rod 119. The sixth connecting rod 119 and the seventh connecting rod 120 are connected by a fourth pin 131 to form a rotating pair. The seventh connecting rod 120 and the eighth connecting rod 121 are connected by a first pin 128 to form a rotating pair. The eighth connecting rod 121 is fixed to the first driving shaft 101, and the sixth bevel gear 111 is fixed to the first driving shaft 101. Moreover, the sixth bevel gear 111 has only one degree of freedom, that is, the rotation of the axis of the first driving shaft 101.

[0089] The B-phase sliding contact 11 is cylindrical and fixed to the ninth connecting rod 122. The ninth connecting rod 122 and the tenth connecting rod 123 are connected by a fifth pin 132 to form a rotating pair. The tenth connecting rod 123 and the eleventh connecting rod 124 are connected by a second pin 129 to form a rotating pair. The eleventh connecting rod 124 is fixed to the second driving shaft 102, and the driving seventh bevel gear 112 is fixed to the second driving shaft 102. Moreover, the driving seventh bevel gear 112 has only one degree of freedom, that is, the rotation of the axis of the second driving shaft 102.

[0090] The C-phase sliding contact 12 is cylindrical and fixed to the twelfth connecting rod 125. The twelfth connecting rod 125 and the thirteenth connecting rod 126 are connected by a sixth pin 133 to form a rotating pair. The thirteenth connecting rod 126 and the fourteenth connecting rod 127 are connected by a third pin 130 to form a rotating pair. The fourteenth connecting rod 127 is fixed to the third driving shaft 103, and the driving eighth bevel gear 113 is fixed to the third driving shaft 103. Moreover, the driving eighth bevel gear 113 has only one degree of freedom, that is, the rotation of the axis of the third driving shaft 103.

[0091] Both ends of the fourth driving shaft 104 have the third bevel gear 108, the first bevel gear 106 and the second bevel gear 107 fixed. Moreover, all three driving bevel gears have only one degree of freedom, that is, the rotation of the axis of the fourth driving shaft 104. And as Figure 9 shown, they are respectively meshed with the teeth of the driving bevel gear 6 and the driving bevel gear 7, and can perform transmission.

[0092] Both ends of the fourth driving shaft 104 have the third bevel gear 108, as well as the first bevel gear 106 and the second bevel gear 107 fixed. Moreover, all three driving bevel gears have only one degree of freedom, that is, the rotation of the axis of the fourth driving shaft 104. As Figure 9 shown, they are respectively meshed with the teeth of the sixth bevel gear 111 and the seventh bevel gear 112, and can perform gear transmission.

[0093] In this embodiment, the first bevel gear 106 and the second bevel gear 107 are non-standard bevel gears, and semi-gears (also called semi-ring gears) are adopted. The teeth only exist within a special semi-circle. The teeth of the two driving bevel gears are designed and distributed according to the actual situation. For example, Figure 15 as shown, when the transmission shaft rotates clockwise and counterclockwise, the stroke directions of the A-phase sliding contact 10 are made consistent, and the reciprocating motion of the A-phase sliding contact 10 is realized.

[0094] In this embodiment, the eighth link 121 and the seventh link 120 are movably connected by the first pin 128; the seventh link 120 and the sixth link 119 are movably connected by the fourth pin 131; the eleventh link 124 and the tenth link 123 are movably connected by the second pin 129; the tenth link 123 and the ninth link 122 are movably connected by the fifth pin 132; the fourteenth link 127 and the thirteenth link 126 are movably connected by the third pin 130; the thirteenth link 126 and the twelfth link 125 are movably connected by the sixth pin 133.

[0095] For example, Figure 13 as shown, when changing from the isolation state to the power generation state, the driving device (driving source) rotates the first driving shaft 101 clockwise, the second driving shaft 102 counterclockwise, and the third driving shaft 103 clockwise. For example, driving the first driving shaft 101 to rotate, driving the first driving shaft 101 to drive the sixth bevel gear 111 in sequence, the sixth bevel gear 111 drives the first bevel gear 106 and the second bevel gear 107 to rotate, and then drives the fourth driving shaft 104 and the fifth driving shaft 105 to rotate, and then drives the seventh bevel gear 112 and the eighth bevel gear 113 to rotate, driving the A-phase sliding contact 10 to move downward, the B-phase sliding contact 11 to move upward, and the C-phase sliding contact 12 to move downward. The A-phase sliding contact 10 is located between the first A-phase static contact seat 134 and the second A-phase static contact seat 135, electrically connecting the lower conductor and the upper conductor of the A phase. The B-phase sliding contact 11 is located between the first B-phase static contact seat 136 and the third B-phase static contact seat 138, and the upper conductor and the middle conductor of the B phase conduct current. The external current flows in from the incoming flange of the B phase and flows out from the outgoing flange of the B phase; the C-phase sliding contact is located between the first C-phase static contact seat 139 and the second C-phase static contact seat 140, and the lower conductor and the middle conductor of the C phase conduct current. The external current flows in from the incoming flange of the C phase and flows out from the outgoing flange of the C phase.

[0096] For example, Figure 14As shown, it changes from the isolation state to the pumping state structure. The driving device (driving source) will drive the first driving shaft 101 counterclockwise, the second driving shaft 102 clockwise, and the third driving shaft 103 counterclockwise. For example, driving the first driving shaft 101 to rotate, driving the first driving shaft 101 to drive the sixth bevel gear 111 in sequence, and the sixth bevel gear 111 drives the first bevel gear 106 and the second bevel gear 107 to rotate, thereby driving the fourth driving shaft 104 and the fifth driving shaft 105 to rotate, and further driving the seventh bevel gear 112 and the eighth bevel gear 113 to rotate, driving the A-phase sliding contact 10 to move downward, the B-phase sliding contact 11 to move downward, and the C-phase sliding contact 12 to move upward. The A-phase sliding contact 10 is between the first A-phase static contact seat 134 and the second A-phase static contact seat 135, electrically connecting the lower conductor of the A-phase and the upper conductor of the A-phase. The B-phase sliding contact 11 is between the second B-phase static contact seat 137 and the first B-phase static contact seat 136, conducting current between the lower conductor of the B-phase and the middle conductor of the B-phase. The external current flows in from the outgoing flange of the C-phase and out from the incoming flange of the B-phase. The C-phase sliding contact 12 is between the first C-phase static contact seat 139 and the third C-phase static contact seat 141, and the upper conductor of the B-phase and the middle conductor of the C-phase can conduct current. The external current flows in from the outgoing flange of the B-phase and out from the incoming flange of the C-phase.

[0097] It can be seen that this transmission system consists of bevel gears, connecting rods, cylindrical conductors and corresponding fixed positions. Only through the same driving source, different stroke requirements of the three-phase moving contacts in the three working conditions of the phase change switch can be realized, and the stroke, materials and connecting rod structure can be adjusted according to this system as a prototype to meet the requirements of the phase change switch.

[0098] This transmission system can complete the conversion of different working conditions by applying power to a single mechanism driving shaft, and any one of the first driving shaft 101, the second driving shaft 102, the third driving shaft 103, the fourth driving shaft 104 and the fifth driving shaft 105 can be used.

[0099] In this embodiment, the reciprocating motion of a single phase of the phase change switch is realized by two non-standard bevel gears (i.e., the first bevel gear 106 and the second bevel gear 107).

[0100] In summary, the present utility model provides a three-phase moving contact mechanical interlocking drive system for a three-position disconnector. This system includes a drive assembly with three drive ends, which are respectively connected to the A-phase sliding contact, the B-phase sliding contact, and the C-phase sliding contact. The drive end of the drive assembly is only connected to one drive source. By designing one drive source to drive the entire drive assembly, the synchronization of the three-phase moving contacts during the switching process is significantly improved. Compared with the traditional design with multiple drive sources, a single drive source can ensure that all moving contacts start and end their movements at the same time point, thus avoiding the problem that the reliability of phase sequence switching cannot be guaranteed due to non-synchronization. The structure and principle of this system are simple, facilitating implementation and operation and maintenance, and having good popularization and application value.

[0101] The above embodiments are only one of the implementation manners capable of realizing the technical solution of the present utility model. The scope of protection required by the present utility model is not only limited by this embodiment, but also includes any changes, substitutions, and other implementation manners that are easily conceivable by any person skilled in the art within the technical scope disclosed by the present utility model.

Claims

1. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector, characterized in that: It includes a transmission assembly, wherein the driving end of the transmission assembly is connected to only one driving source; The first transmission end of the transmission component is connected to the A-phase sliding contact (10), the second transmission end is connected to the B-phase sliding contact (11), and the third transmission end is connected to the C-phase sliding contact (12); When the three-position disconnector is in an isolated state, the A-phase sliding contact (10), the second transmission end B-phase sliding contact (11) and the C-phase sliding contact (12) are located in the corresponding first conductors, and the internal conductors of each phase are in a disconnected state; When the three-position disconnector is switched to the power generation state, the driving source starts forward, and drives the A-phase sliding contact (10) through the first transmission end to connect the A-phase first conductor and the A-phase second conductor; drives the B-phase sliding contact (11) through the second transmission end to connect the B-phase first conductor and the B-phase third conductor; and drives the C-phase sliding contact (12) through the third transmission end to connect the C-phase first conductor and the C-phase second conductor; When the three-position disconnector is switched to the pumping state, the driving source is started in the reverse direction, and the first transmission end drives the A-phase sliding contact (10) to connect the A-phase first conductor and the A-phase second conductor; the second transmission end drives the B-phase sliding contact (11) to connect the B-phase first conductor and the C-phase second conductor; and the third transmission end drives the C-phase sliding contact (12) to connect the C-phase first conductor and the B-phase third conductor.

2. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 1, characterized in that: The transmission assembly comprises a driving rack (2) connected to a driving source; One end of the driving rack (2) is meshed with the first gear (3), and the other end is meshed with the second gear (4); The first gear (3) is movably connected to a second drive connecting rod (6) and a first drive connecting rod (5) in sequence from bottom to top, and the first drive connecting rod (5) is movably connected to the A-phase sliding contact (10); A fourth driving connecting rod (8) is fixedly connected to the second gear (4) and is located in the middle of the fourth driving connecting rod (8); One end of the fourth driving connecting rod (8) is movably connected to the B-phase sliding contact (11), and the other end is movably connected to the C-phase sliding contact (12).

3. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 2, characterized in that: One end of the fourth driving connecting rod (8) is movably connected to the third driving connecting rod (7), and the top end of the third driving connecting rod (7) is movably connected to the B-phase sliding contact (11).

4. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 2, characterized in that: The other end of the fourth driving link (8) is movably connected to the fifth driving link (9), and the top end of the fifth driving link (9) is movably connected to the C-phase sliding contact (12).

5. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 2, characterized in that: When the three-position isolating switch is in an isolating state, the second drive connecting rod (6) and the first drive connecting rod (5) are in a straight line, and the fourth drive connecting rod (8) is parallel to the drive rack (2).

6. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 1, characterized in that: The transmission assembly comprises a first drive shaft (101), a second drive shaft (102), a third drive shaft (103), a fourth drive shaft (104) and a fifth drive shaft (105); the output end of the drive source is connected to any one of the first drive shaft (101), the second drive shaft (102) and the third drive shaft (103); One end of the first driving shaft (101) is connected to a sixth bevel gear (111), and the other end is movably connected to an A-phase sliding contact (10); One end of the second drive shaft (102) is connected to a seventh bevel gear (112), and the other end is movably connected to a B-phase sliding contact (11); One end of the third drive shaft (103) is connected to an eighth bevel gear (113), and the other end is movably connected to a C-phase sliding contact (12); The sixth bevel gear (111) and the seventh bevel gear (112) are connected via a fourth drive shaft (104); a first bevel gear (106) and a second bevel gear (107) are sleeved on one end of the fourth drive shaft (104); The first bevel gear (106) and the second bevel gear (107) are meshed on both sides of the sixth bevel gear (111); the first bevel gear (106) and the second bevel gear (107) are both half gears, and the teeth of the two are centrally symmetrically arranged with the sixth bevel gear (111) as the center; The seventh bevel gear (112) is connected to the eighth bevel gear (113) via a fifth drive shaft (105).

7. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 6, characterized in that: A third bevel gear (108) is sleeved on the other end of the fourth drive shaft (104), and the third bevel gear (108) is meshed with the seventh bevel gear (112).

8. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 6, characterized in that: One end of the fifth drive shaft (105) is connected to the fourth bevel gear (109), and the fourth bevel gear (109) is meshed with the seventh bevel gear (112); the other end of the fifth drive shaft (105) is connected to the fifth bevel gear (110), and the fifth bevel gear (110) is meshed with the eighth bevel gear (113).

9. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 6, characterized in that: The first drive shaft (101) is movably connected in sequence to an eighth connecting rod (121), a seventh connecting rod (120) and a sixth connecting rod (119), and the sixth connecting rod (119) is connected to the A-phase sliding contact (10); The second drive shaft (102) is movably connected in sequence to an eleventh connecting rod (124), a tenth connecting rod (123) and a ninth connecting rod (122), and the ninth connecting rod (122) is connected to the B-phase sliding contact (11); The third drive shaft (103) is movably connected in sequence to a fourteenth connecting rod (127), a thirteenth connecting rod (126) and a twelfth connecting rod (125), and the twelfth connecting rod (125) is connected to the C-phase sliding contact (12).

10. A three-phase moving contact mechanical interlocking transmission system for a three-position disconnector according to claim 9, characterized in that: The eighth connecting rod (121), the seventh connecting rod (120) and the sixth connecting rod (119) are connected via an axle pin; the eleventh connecting rod (124), the tenth connecting rod (123) and the ninth connecting rod (122) are connected via an axle pin; the fourteenth connecting rod (127), the thirteenth connecting rod (126) and the twelfth connecting rod (125) are connected via an axle pin.

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