PC level high current dual power automatic transfer switch

Abstract

A PC level large current double power automatic transfer switch, including electromagnet drive mechanism and contact arc extinguishing mechanism, for three segment position work, symmetrically setting two electromagnet drive mechanisms, for two segment position work, only one electromagnet drive mechanism is needed, the drive electromagnet is provided with a thrust coil and a tension coil, the moving iron core pushes or pulls the gear transmission lever to act and convert, the contact four-link mechanism is arranged on the action rotating shaft of the normal power supply and the standby power supply, the action interlocking device is arranged between the two action rotating shafts, so that faster and larger transmission torque can be obtained on the action rotating shaft of the double power automatic transfer switch, due to the action of the four-link mechanism and the interlocking device, the stable work of the double power supply under various working conditions can be ensured, and the double power automatic transfer switch with simple structure and stable performance is suitable for power conversion under larger current.

Description

[0001] The present application relates to a low-voltage electric appliance, in particular to a PC level large-current double power automatic transfer switch. BACKGROUND

[0002] Double power automatic transfer switch is a commonly used low-voltage electric appliance, which is often used for conversion between two power supplies to ensure that when one power supply fails or stops supplying power, the other power supply can be quickly switched to ensure normal power supply of the load circuit. Generally, double power automatic transfer switch has a lever action mechanism and a contact arc extinguishing mechanism. Due to the structure of the lever action mechanism and the contact arc extinguishing mechanism of the traditional PC level double power automatic transfer switch, the transmitted action torque is small, and the action speed of the double power automatic transfer switch during power conversion also cannot meet the requirements. When the double power automatic transfer switch performs power conversion, especially large-current power conversion, it is not enough to push the contact to act quickly to make the double power automatic transfer switch smoothly perform power conversion, and the working stability also needs to be improved. SUMMARY

[0003] The present application aims to overcome the drawbacks of the prior art and discloses a PC level large-current double power automatic transfer switch with large torque transmission, fast conversion speed, simple structure and stable working performance.

[0004] To achieve the above purpose, the technical solution adopted by the present application is:

[0005] A PC level large-current double power automatic transfer switch suitable for three-stage work, comprising a common power electromagnetic drive mechanism and a standby power electromagnetic drive mechanism with the same structure, a common power contact arc extinguishing mechanism and a standby power contact arc extinguishing mechanism with the same structure;

[0006] Further provided, the common power electromagnetic drive mechanism comprises a common power drive electromagnetic iron, a common power transmission connecting rod, a common power transmission lever and a common power action shaft provided with a common power shaft transmission gear;

[0007] Further provided, the standby power electromagnetic drive mechanism comprises a standby power drive electromagnetic iron, a standby power transmission connecting rod, a standby power transmission lever and a standby power action shaft provided with a standby power shaft transmission gear;

[0008] Further setting, the common power drive electromagnet is arranged on the double power mounting base, the common power drive electromagnet is internally provided with a common power thrust coil and a common power pull coil, the common power thrust coil and the common power pull coil are internally provided with a common power action iron core, a common power transmission connecting rod is hinged to one end of the common power action iron core, and the other end of the common power transmission connecting rod is hinged to a force applying end of a common power transmission lever, when the thrust coil of the common power drive electromagnet is powered, the action iron core will push the transmission connecting rod to drive the common power action rotating shaft to rotate, so that the common power moving contact of the double power automatic transfer switch is closed, when the pull coil of the common power drive electromagnet is powered, the action iron core will pull the transmission connecting rod to drive the common power moving contact of the double power automatic transfer switch to open, a resistance end of the common power transmission lever is provided with a common power lever transmission gear, the common power lever transmission gear is meshed with a common power rotating shaft transmission gear arranged on the common power action rotating shaft, the common power transmission lever and the common power action rotating shaft are gear driven, so that the double power automatic transfer switch can obtain a large enough transmission torque on the common power action rotating shaft during power conversion, the common power lever transmission gear and the common power rotating shaft transmission gear are driven at a transmission ratio less than 1, so that the double power automatic transfer switch can obtain a faster rotating speed on the common power action rotating shaft during power conversion, which is beneficial to arc extinguishing and working stability of the double power automatic transfer switch;

[0009] Further setting, the standby power drive electromagnet and the normal power drive electromagnet are symmetrically arranged on the installation bottom plate of the dual power supply, the standby power drive electromagnet is internally provided with a standby power thrust coil and a standby power pull coil, the standby power thrust coil and the standby power pull coil are internally provided with a standby power action iron core, one end of the standby power action iron core is hingedly connected with a standby power transmission connecting rod, the other end of the standby power transmission connecting rod is hingedly connected with a force applying end of a standby power transmission lever, when the thrust coil of the standby power drive electromagnet is electrified, the action iron core will push the transmission connecting rod to make the standby power action rotating shaft rotate to make the standby power moving contact of the dual power automatic transfer switch close, when the pull coil of the standby power drive electromagnet is electrified, the action iron core will pull the transmission connecting rod to make the standby power moving contact of the dual power automatic transfer switch open, the resistance end of the standby power transmission lever is provided with a standby power lever transmission tooth, the standby power lever transmission tooth is meshed with a standby power rotating shaft transmission gear arranged on the standby power action rotating shaft, the standby power transmission lever and the standby power action rotating shaft adopt gear transmission, so that the dual power automatic transfer switch can obtain a large enough transmission torque on the standby power action rotating shaft during power conversion, the standby power lever transmission tooth and the standby power rotating shaft transmission gear are driven at a transmission ratio less than 1, so that the dual power automatic transfer switch can obtain a faster rotating speed on the standby power rotating shaft during power conversion, which is beneficial to the working stability of the dual power automatic transfer switch.

[0010] Further setting, the normal power contact arc extinguishing mechanism comprises a normal power action rotating shaft and a normal power contact four-link mechanism, the normal power action rotating shaft is provided with an upper connecting rod of the normal power contact four-link mechanism, the upper connecting rod of the normal power contact four-link mechanism is hingedly connected with a lower connecting rod of the normal power contact four-link mechanism, the other end of the lower connecting rod of the normal power contact four-link mechanism is hingedly connected with a normal power moving contact, a normal power arc extinguishing cover is arranged at the normal power moving contact and the static contact, when the normal power action rotating shaft is in the closed position, the included angle between the upper connecting rod of the normal power contact four-link mechanism and the lower connecting rod of the normal power contact four-link mechanism is greater than 180 degrees, so that after the normal power contact four-link mechanism passes through the dead point, the normal power moving contact is firmly locked in the closed position by the reaction force of the spring on the normal power moving contact, which has the advantage that the moving contact and the static contact of the dual power automatic transfer switch are not easy to be bounced away under the action of large current power, which is beneficial to improving the short time withstand current and working stability of the dual power automatic transfer switch.

[0011] Further setting, the standby power contact arc extinguishing mechanism includes standby power action shaft and standby power contact four-bar linkage, the standby power action shaft is provided with the upper link of standby power contact four-bar linkage, the upper link of standby power contact four-bar linkage is hingedly connected with the lower link of standby power contact four-bar linkage, the other end of the lower link of standby power contact four-bar linkage is hingedly connected with standby power moving contact, standby power arc extinguishing cover is arranged at standby power moving contact and static contact, when the standby power action shaft is in the closed position, the included angle between the upper link of standby power contact four-bar linkage and the lower link of standby power contact four-bar linkage is greater than 180 degrees, so that, after standby power contact four-bar linkage passes through the dead point, the standby power moving contact is firmly locked in the closed position by the reaction force of the spring on the standby power moving contact, and the moving contact and the static contact are not easy to pop out under the action of large current power, so as to improve the short time withstand current and working stability of the dual power automatic transfer switch.

[0012] Further setting, the standby power moving contact and the standby power moving contact adopt a multi-piece array structure, and two compression springs are arranged on each array element, and this structure is beneficial to improve the short time withstand current and working stability of the dual power automatic transfer switch.

[0013] Further setting, the standby power action shaft is provided with a standby power stop mechanism, the standby power stop mechanism includes a standby power stop rod arranged on the standby power action shaft, a standby power closing stop shaft and a standby power opening stop shaft are arranged on both sides of the standby power stop rod, and the standby power closing stop shaft and the standby power opening stop shaft are fixed on the stop mounting plate of the dual power automatic transfer switch through an equilateral triangular shaft plate device, so that when the standby power performs closing conversion, the standby power action shaft will be limited on the standby power closing stop shaft, and when the standby power performs opening conversion, the standby power action shaft will be limited on the standby power opening stop shaft.

[0014] The standby power action shaft is provided with a standby power stop mechanism, and the standby power stop mechanism has the same structure as the standby power stop mechanism.

[0015] Further setting, the common power source action rotating shaft end is provided with a common power source position indicating lever device, the standby power source action rotating shaft end is provided with a standby power source position indicating lever device, the common power source position indicating lever device and the standby power source position indicating lever device are same in structure, including position indicator, fixed wheel, flat key, auxiliary switch lever, the fixed wheel is connected with common power source action rotating shaft or standby power source action rotating shaft as a whole through flat key, the position indicator is arranged on the fixed wheel, the auxiliary switch lever is U-shaped, one end is arranged at the common power source action rotating shaft end or standby power source action rotating shaft end, the other end is arranged as auxiliary switch lever, when the power conversion of double power automatic transfer switch is completed, the lever on the action rotating shaft is operated, the auxiliary switch on the lever side is turned off to make the drive electromagnet of common power source or standby power source power off.

[0016] Further setting, when manual operation is needed to the double power automatic transfer switch, the manual operation handle of double power automatic transfer switch is inserted into the position indicator to realize manual operation of double power automatic transfer switch, such as common closing, standby opening, common opening, standby closing or common opening, standby opening, etc., the structure of double power automatic transfer switch is simplified, and manual operation is also very convenient.

[0017] Further setting, the force arm of common power source transmission lever and the force arm of standby power source transmission lever are provided with interlocking connecting rod, so that when the power conversion of double power automatic transfer switch is carried out, if the common power source is in the open state, the standby power source must be in the closed state, if the common power source is in the closed state, the standby power source must be in the open state, which avoids the occurrence of internal short circuit accident of double power automatic transfer switch.

[0018] Further setting, the spring interlocking device is arranged between the common power source action rotating shaft and the standby power source action rotating shaft, the spring interlocking device comprises a push-up rod, a push-down rod, a compression spring, a common power source interlocking crank and a standby power source interlocking crank, the push-down rod is sleeved in the push-up rod, the compression spring is sleeved between the push-up rod and the push-down rod, the push-up rod is hinged with the common power source action rotating shaft through the common power source interlocking crank, the push-down rod is hinged with the standby power source action rotating shaft through the standby power source interlocking crank, so that when the common power source action rotating shaft is in the closed position and the standby power source action rotating shaft is in the open position, under the action of the common power source contact four-bar linkage mechanism, the standby power source contact four-bar linkage mechanism and the spring interlocking device, the common power source action rotating shaft is in the stable closed position and the standby power source action rotating shaft is in the stable open position; when the standby power source action rotating shaft is in the closed position and the common power source action rotating shaft is in the open position, under the action of the common power source contact four-bar linkage mechanism, the standby power source contact four-bar linkage mechanism and the spring interlocking device, the standby power source action rotating shaft is in the stable closed position and the common power source action rotating shaft is in the stable open position; when the common power source action rotating shaft and the standby power source action rotating shaft are in the open position, under the action of the common power source contact four-bar linkage mechanism, the standby power source contact four-bar linkage mechanism and the spring interlocking device, the common power source action rotating shaft and the standby power source action rotating shaft are interlocked in the stable open position.

[0019] Further setting, a PC level large current dual power automatic transfer switch suitable for two-stage position operation comprises a common power source electromagnet driving mechanism or a standby power source electromagnet driving mechanism, a common power source contact arc extinguishing mechanism and a standby power source contact arc extinguishing mechanism with the same structure;

[0020] Further setting, the common power source electromagnet driving mechanism or the standby power source electromagnet driving mechanism comprises a driving electromagnet, a transmission connecting rod, a transmission lever and a common power source action rotating shaft or a standby power source action rotating shaft provided with a rotating shaft transmission gear;

[0021] The driving electromagnet is arranged on the mounting bottom plate of the dual power source, the driving electromagnet is provided with a push coil and a pull coil, the push coil and the pull coil are sleeved with an action iron core, the action iron core is hinged with the transmission connecting rod at one end, the other end of the transmission connecting rod is hinged with the force applying end of the transmission lever, the resistance end of the transmission lever is provided with a lever transmission tooth, the lever transmission tooth is engaged with the rotating shaft transmission gear arranged on the common power source action rotating shaft or the standby power source action rotating shaft, and the lever transmission tooth and the rotating shaft transmission gear are driven in a transmission ratio less than 1;

[0022] The arc extinguishing mechanism of the common power source contact includes a common power source action rotating shaft and a common power source contact four-link mechanism, the upper link of the common power source contact four-link mechanism is arranged on the common power source action rotating shaft, the lower link of the common power source contact four-link mechanism is hingedly connected to the end of the upper link of the common power source contact four-link mechanism, the common power source moving contact is hingedly connected to the other end of the lower link of the common power source contact four-link mechanism, the arc extinguishing cover of the common power source is arranged at the common power source moving contact and the static contact, the included angle between the upper link of the common power source contact four-link mechanism and the lower link of the common power source contact four-link mechanism is greater than 180 degrees when the common power source action rotating shaft is in the closed position;

[0023] The arc extinguishing mechanism of the standby power source contact includes a standby power source action rotating shaft and a standby power source contact four-link mechanism, the upper link of the standby power source contact four-link mechanism is arranged on the standby power source action rotating shaft, the lower link of the standby power source contact four-link mechanism is hingedly connected to the end of the upper link of the standby power source contact four-link mechanism, the standby power source moving contact is hingedly connected to the other end of the lower link of the standby power source contact four-link mechanism, the arc extinguishing cover of the standby power source is arranged at the standby power source moving contact and the static contact, the included angle between the upper link of the standby power source contact four-link mechanism and the lower link of the standby power source contact four-link mechanism is greater than 180 degrees when the standby power source action rotating shaft is in the closed position;

[0024] Further arrangement, the common power source moving contact and the standby power source moving contact adopt a multi-piece array structure, two compression springs are arranged on each array element, which is conducive to improving the short-time withstand current and working stability of the dual power automatic transfer switch;

[0025] Further arrangement, the common power source action rotating shaft and the standby power source action rotating shaft are provided with a stop mechanism;

[0026] The stop mechanism includes a common power source stop rod arranged on the common power source action rotating shaft, a standby power source stop rod arranged on the standby power source action rotating shaft, a common power source stop shaft is arranged outside the common power source stop rod, a standby power source stop shaft is arranged outside the standby power source stop rod, the stop shafts are fixed on the stop mounting plate of the dual power automatic transfer switch through an equilateral triangular shaft plate device, so that when the dual power automatic transfer switch performs power conversion, the common power source action rotating shaft or the standby power source action rotating shaft will be limited on the stop shafts on the two sides through the common power source stop rod or the standby power source stop rod, and the power conversion of the dual power automatic transfer switch is completed.

[0027] Further setting, the common power source action rotating shaft end or the standby power source action rotating shaft end is provided with a power source position indicating lever device, including a position indicator, a fixed wheel, a flat key, an auxiliary switch lever, the fixed wheel is connected with the common power source action rotating shaft or the standby power source action rotating shaft as a whole through the flat key, the position indicator is arranged on the fixed wheel, the auxiliary switch lever is U-shaped, arranged on the common power source action rotating shaft end or the standby power source action rotating shaft end, and the other end is arranged as an auxiliary switch lever, when the power conversion of the dual power automatic transfer switch is completed, the lever on the common power source action rotating shaft or the standby power source action rotating shaft is operated, the auxiliary switch on the lever side is turned off to make the common power source driving electromagnet or the standby power source driving electromagnet power off.

[0028] Further setting, when manual operation is needed for the dual power automatic transfer switch, the manual operation handle equipped with the dual power automatic transfer switch is inserted into the common power source position indicator or the standby power source position indicator to realize the two working conditions of the common closing, standby opening and common opening, standby closing of the dual power automatic transfer switch, which simplifies the structure of the dual power automatic transfer switch and is convenient for manual operation.

[0029] Further setting, the rotating shaft linkage rod is arranged between the common power source action rotating shaft and the standby power source action rotating shaft.

[0030] Further setting, the common power source stop lever and the standby power source stop lever are arranged as a double-layer structure, the inner layer is used for stopping, and the outer layer is hinged with the rotating shaft linkage rod, so that the common power source action rotating shaft, the standby power source action rotating shaft, the common power source stop lever, the standby power source stop lever and the rotating shaft linkage rod form a parallelogram linkage mechanism, to ensure that when the common power source is closed, the standby power source is in an open state, and when the common power source is opened, the standby power source is in a closed state, so that the internal short circuit accident of the dual power automatic transfer switch is avoided, and the device structure is simple and the interlocking is reliable.

[0031] The PC level large current dual power automatic transfer switch with the above structure has the beneficial effects that:

[0032] The power conversion of the double power automatic transfer switch adopts gear transmission conversion, and the transmission ratio is less than 1, so that a faster and larger transmission torque can be obtained on the action rotating shaft of the double power automatic transfer switch, and since the action rotating shaft is rigidly connected with the upper connecting rod of the contact four connecting rod mechanism, a faster action speed can be obtained for the closing and opening conversion of the double power automatic transfer switch, which is beneficial to the rapid arc extinguishing of the double power automatic transfer switch. Meanwhile, the contact system adopts the four connecting rod mechanism, and the designed angle between the upper connecting rod and the lower connecting rod of the four connecting rod mechanism of the double power automatic transfer switch is greater than 180 degrees when the power conversion is realized, so that the closing and opening of the double power automatic transfer switch is stable and reliable under the combined action of the reaction force of the moving contact spring and the spring interlocking device, which is beneficial to the short time withstand current of the double power automatic transfer switch and improves the working stability of the double power automatic transfer switch. Meanwhile, when the double power automatic transfer switch is manually operated, the manual operation handle is inserted into the position indicator of the double power automatic transfer switch, and from the overall structure, the structure of the PC level large current double power automatic transfer switch is simple, stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a three-segment internal overall structure diagram of the application;

[0034] Figure 2 It is Figure 1 The cross-sectional structure diagram of the electromagnet driving mechanism is shown in the figure;

[0035] Figure 3 It is a structure diagram of the electromagnet driving mechanism and the contact four connecting rod mechanism of the application;

[0036] Figure 4 It is Figure 1 The structure diagram of the spring interlocking device in the normally closed standby opening state is shown in the figure;

[0037] Figure 5 It is Figure 1 The structure diagram of the spring interlocking device in the normally open standby closing state is shown in the figure;

[0038] Figure 6 It is Figure 1 The structure diagram of the spring interlocking device in the normally open standby opening state is shown in the figure;

[0039] Figure 7 It is a structure diagram of the three-segment stop device of the application.

[0040] Figure 8 It is a structure diagram of the two-segment electromagnet driving mechanism of the application;

[0041] Figure 9 It is a structure diagram of the two-segment stop device and the linkage connecting rod of the application;

[0042] Figure 10 This is a schematic diagram of the indicator lever device and handle operation structure of the present invention;

[0043] Figure 11 for Figure 10 Structural diagram of the lever mechanism;

[0044] Figure 12 for Figure 1 Structural diagram of spring interlock device;

[0045] Figure 13 for Figure 12 Upper kit structure diagram;

[0046] Figure 14 for Figure 12 Below is a diagram of the component structure. Detailed Implementation

[0047] First, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "main power supply" and "backup power supply" are used only to describe the position relative to the drawing and should not be construed as indicating or implying the inherent characteristic names of that position in actual use.

[0048] Below, in conjunction with Figures 1-14 The present invention will be further illustrated through specific embodiments.

[0049] like Figures 1-3 As shown, a PC-grade high-current dual-power automatic transfer switch suitable for three-stage operation (normally closed, standby open, normally open, standby closed, normally open, standby open) includes a normal power supply 2 and a standby power supply 4 with identical structures, a normal power supply electromagnet drive mechanism 20 and a standby power supply electromagnet drive mechanism 40, and a normal power supply contact arc extinguishing mechanism and a standby power supply contact arc extinguishing mechanism with identical structures.

[0050] Further configuration: The common power supply electromagnet drive mechanism 20 includes a common power supply drive electromagnet 203, a common power supply transmission link 202, a common power supply transmission lever 201, and a common power supply actuation shaft 205 equipped with a common power supply shaft transmission gear 206.

[0051] Further, the electromagnet drive mechanism 40 of the backup power supply includes a backup power supply drive electromagnet 403, a backup power supply transmission link 402, a backup power supply transmission lever 401, and a backup power supply actuation shaft 405 equipped with a backup power supply shaft transmission gear 406.

[0052] Further setting, the common power drive electromagnet 230 is arranged on the installation bottom plate 6 of the double power automatic transfer switch, the common power drive electromagnet 203 is internally provided with a common power thrust coil 2032 and a common power pull coil 2033, the common power thrust coil 2032 and the common power pull coil 2033 are internally sleeved with a common power action iron core 2031, a common power transmission connecting rod 202 is hinged at the end of the common power action iron core 2031, the other end of the common power transmission connecting rod 202 is hinged to the force applying end of a common power transmission lever 201, when the thrust coil 2032 of the common power drive electromagnet 203 is energized, the action iron core 2031 will push the transmission connecting rod 202 to make the common power action rotating shaft 205 rotate to make the common power moving contact 2052 of the double power automatic transfer switch close, when the pull coil 2033 of the common power drive electromagnet 203 is energized, the action iron core 2031 will pull the transmission connecting rod 202 to make the common power moving contact 2052 of the double power automatic transfer switch open, the resistance end of the common power transmission lever 201 is provided with a common power lever transmission gear 2011, the common power lever transmission gear 2011 is engaged with a common power rotating shaft transmission gear 206 arranged on the common power action rotating shaft 205, the common power transmission lever and the common power rotating shaft adopt gear transmission, so that the double power automatic transfer switch can obtain sufficient transmission torque during power conversion, the common power lever transmission gear 2011 and the common power rotating shaft transmission gear 206 are driven at a transmission ratio less than 1, so that the double power automatic transfer switch can obtain faster rotating speed on the common power action rotating shaft 205 during power conversion, which is beneficial to electrical arc extinguishing and working stability of the double power automatic transfer switch.

[0053] Further setting, the drive electromagnet 403 of the standby power supply and the drive electromagnet 203 of the normal power supply are symmetrically arranged on the mounting bottom plate 6 of the double power automatic transfer switch, the standby power supply drive electromagnet 403 is equipped with power supply thrust coil 4032 and standby power supply pull coil 4033, the standby power supply thrust coil 4032 and the standby power supply pull coil 4033 are sleeved with standby power supply action iron core 4031, the standby power supply action iron core 4031 is hinged with standby power supply transmission connecting rod 402 at the end, the other end of the standby power supply transmission connecting rod 402 is hinged with the force applying end of standby power supply transmission lever 401, when the thrust coil 4032 of the standby power supply drive electromagnet is powered, the standby power supply action iron core 4031 will push the transmission connecting rod 402 to make the standby power supply action rotating shaft 405 rotate, so that the standby power supply moving contact of the double power automatic transfer switch is closed, when the pull coil 4033 of the standby power supply drive electromagnet 403 is powered, the standby power supply action iron core 4031 will pull the transmission connecting rod 402 to make the standby power supply moving contact 4052 of the double power automatic transfer switch be opened, the resistance end of the standby power supply transmission lever 401 is provided with standby power supply lever transmission teeth, the standby power supply lever transmission teeth are engaged with the standby power supply rotating shaft transmission gear 406 arranged on the standby power supply action rotating shaft 405, the standby power supply transmission lever 401 and the standby power supply action rotating shaft 405 adopt gear transmission, so that the double power automatic transfer switch can obtain sufficient transmission torque during power conversion, the standby power supply lever transmission teeth and the standby power supply rotating shaft transmission gear are transmitted with a transmission ratio less than 1, so that the double power automatic transfer switch can obtain faster rotating speed on the standby power supply rotating shaft 405 during power conversion, which is beneficial to the electrical arc extinguishing and working stability of the double power automatic transfer switch.

[0054] Further setting, as Figure 1 、 Figure 3 、 Figure 4As shown, the contact arc extinguishing mechanism of the normal power supply includes a normal power supply action rotating shaft 205 and a normal power supply contact four-bar linkage mechanism, the normal power supply action rotating shaft 205 is provided with an upper link 2051 of the normal power supply contact four-bar linkage mechanism, the upper link 2051 is hingedly connected with a lower link 2054, the other end of the lower link 2054 is hingedly connected with a normal power supply moving contact 2052, a normal power supply arc extinguishing cover 204 is arranged at the normal power supply moving contact 2052 and a static contact 2055, when the normal power supply action rotating shaft 205 is in a closed position, the included angle between the upper link 2051 and the lower link 2054 of the normal power supply contact four-bar linkage mechanism is greater than 180 degrees, so that, after the normal power supply contact four-bar linkage mechanism passes through a dead point, the closed position of the moving contact 2052 is firmly locked by the reaction force of the spring 2053 on the moving contact 2052, and the moving contact and the static contact are not easily opened under the action of large current electric force, which is beneficial to improve the short time withstand current and working stability of the dual power automatic transfer switch.

[0055] Further setting, the contact arc extinguishing mechanism of the normal power supply includes a normal power supply action rotating shaft 205 and a normal power supply contact four-bar linkage mechanism, the normal power supply action rotating shaft 205 is provided with an upper link 2051 of the normal power supply contact four-bar linkage mechanism, the upper link 2051 is hingedly connected with a lower link 2054, the other end of the lower link 2054 is hingedly connected with a normal power supply moving contact 2052, a normal power supply arc extinguishing cover 204 is arranged at the normal power supply moving contact 2052 and a static contact 2055, when the normal power supply action rotating shaft 205 is in a closed position, the included angle between the upper link 2051 and the lower link 2054 of the normal power supply contact four-bar linkage mechanism is greater than 180 degrees, so that, after the normal power supply contact four-bar linkage mechanism passes through a dead point, the closed position of the moving contact 2052 is firmly locked by the reaction force of the spring 2053 on the moving contact 2052, and the moving contact and the static contact are not easily opened under the action of large current electric force, which is beneficial to improve the short time withstand current and working stability of the dual power automatic transfer switch.

[0056] Further setting, the normal power supply moving contact 2052 and the standby power supply moving contact 4052 adopt a multi-piece array structure, two compression springs 2053 are arranged on each array element, which is beneficial to improve the short time withstand current and working stability of the dual power automatic transfer switch.

[0057] Further setting, as Figure 7As shown, the normal power source action rotating shaft 205 is provided with a normal power source stop mechanism 207, which comprises a normal power source stop lever 208 arranged on the normal power source action rotating shaft 205, and a normal power source closing stop shaft 2071 and a normal power source opening stop shaft 2073 arranged on both sides of the normal power source stop lever 208. The normal power source closing stop shaft 2071 and the normal power source opening stop shaft 2073 are fixed on the stop mounting plate 240 of the double power source automatic transfer switch by an equilateral triangular shaft plate device through fastening bolts 2072. Thus, when the normal power source performs closing conversion, the normal power source action rotating shaft 205 will be limited at the normal power source closing stop shaft 2071 through clockwise rotation of the normal power source stop lever 208; and when the normal power source performs opening conversion, the normal power source action rotating shaft 205 will be limited at the normal power source opening stop shaft 2073 through counterclockwise rotation of the normal power source stop lever 208.

[0058] Similarly, the standby power source action rotating shaft 405 is provided with a standby power source stop mechanism 407, which comprises a standby power source stop lever 408 arranged on the standby power source action rotating shaft 405, and a standby power source closing stop shaft 4071 and a standby power source opening stop shaft 4073 arranged on both sides of the standby power source stop lever 408. The standby power source closing stop shaft 4071 and the standby power source opening stop shaft 4073 are fixed on the stop mounting plate 240 of the double power source automatic transfer switch by an equilateral triangular shaft plate device through fastening bolts 4072. Thus, when the standby power source performs closing conversion, the standby power source action rotating shaft 405 will be limited at the standby power source closing stop shaft 4071 through counterclockwise rotation of the standby power source stop lever 408; and when the standby power source performs opening conversion, the standby power source action rotating shaft 405 will be limited at the standby power source opening stop shaft 4073 through clockwise rotation of the standby power source stop lever 408.

[0059] Further provided are: Figure 10 、 Figure 11As shown, the common power source action rotating shaft 205 end is provided with a common power source position indicating lever device, the common power source position indicating lever device includes a position display plate 8, a common power source position indicator 2022, a common power source fixed wheel 2023, a common power source flat key 2024, a common power source auxiliary switch lever 2021, the common power source fixed wheel 2023 is connected with the common power source action rotating shaft 205 as a whole through the common power source flat key 2024, the common power source position indicator 2022 is arranged on the common power source fixed wheel 2023, the common power source auxiliary switch lever 2021 is U-shaped, one end is arranged at the shaft end of the common power source action rotating shaft 205, and the other end is arranged as a common power source auxiliary switch lever, when the double power source action conversion is completed, the common power source auxiliary switch lever 2021 installed at the shaft end of the common power source action rotating shaft 205 acts, disconnects the common power source auxiliary switch 201 on both sides of the lever and makes the pull coil or the push coil of the common power source driving electromagnet power off.

[0060] Similarly, the standby power source action rotating shaft 405 end is provided with a standby power source position indicating lever device, the standby power source position indicating lever device includes a position display plate 8, a standby power source position indicator 4022, a standby power source fixed wheel, a standby power source flat key, a standby power source auxiliary switch lever 4021, the standby power source fixed wheel is connected with the standby power source action rotating shaft 405 as a whole through the standby power source flat key, the standby power source position indicator 4022 is arranged on the standby power source fixed wheel, the standby power source auxiliary switch lever 4021 is U-shaped, one end is arranged at the shaft end of the standby power source action rotating shaft 405, and the other end is arranged as a standby power source auxiliary switch lever, when the double power source action conversion is completed, the standby power source auxiliary switch lever 4021 installed at the shaft end of the standby power source action rotating shaft 405 acts, disconnects the standby power source auxiliary switch 401 on both sides of the lever and makes the pull coil or the push coil of the standby power source driving electromagnet power off.

[0061] Further setting, when manual operation is needed for the double power source automatic transfer switch, the manual operation handle 5 arranged on the double power source automatic transfer switch is inserted into the common power source position indicator 2022 or the standby power source position indicator 4022, so that the common opening, standby opening, common opening, standby opening or common opening, standby opening and various working conditions of the double power source automatic transfer switch can be realized, and the structure of the double power source automatic transfer switch is simplified, and manual operation is also very convenient.

[0062] Further setting, as Figure 1 , Figure 2As shown, the interlocking link 1 is arranged between the force applying arm of the normal power transmission lever 201 and the force applying arm of the standby power transmission lever 401, so that when the dual power automatic transfer switch is switching the power, if the normal power is in the open position, the standby power must be in the closed position, and if the normal power is in the closed position, the standby power must be in the open position. This simple interlocking device avoids the internal short circuit accident of the dual power automatic transfer switch.

[0063] Further arrangement, as shown in the figure, Figure 1 、 Figure 12 、 Figure 13 、 Figure 14 As shown, the spring interlocking device 3 is arranged between the normal power action shaft 205 and the standby power action shaft 405, the spring interlocking device 3 includes the upper push rod 301, the lower push rod 303, the compression spring 302, the normal power interlocking crank 304 and the standby power interlocking crank 305, the lower push rod 303 is sleeved in the sleeve hole 3011 of the upper push rod 301 through the sleeve rod 3031, the compression spring 302 is sleeved between the upper push rod 301 and the lower push rod 303, the upper push rod 301 is hinged with the normal power action shaft 205 through the normal power interlocking crank 304, and the lower push rod 303 is hinged with the standby power action shaft 405 through the standby power interlocking crank 305.

[0064] As shown in the figure, Figure 4 When the normal power action shaft 205 is in the closed position and the standby power action shaft 405 is in the open position, under the action of the compression spring 302 in the normal power contact four bar mechanism, the standby power contact four bar mechanism and the spring interlocking device, the normal power action shaft will be in the stable closed position and the standby power action shaft will be in the stable open position.

[0065] As shown in the figure, Figure 5 When the standby power action shaft 405 is in the closed position and the normal power action shaft 205 is in the open position, under the action of the compression spring in the normal power contact four bar mechanism, the standby power contact four bar mechanism and the spring interlocking device, the standby power action shaft will be in the stable closed position and the normal power action shaft will be in the stable open position.

[0066] As shown in the figure, Figure 6 When the normal power action shaft 205 and the standby power action shaft 405 are both in the open position, under the action of the compression spring in the normal power contact four bar mechanism, the standby power contact four bar mechanism and the spring interlocking device, the normal power action shaft 205 and the standby power action shaft 405 are both interlocked in the stable open position.

[0067] Further arrangement, a PC level large current dual power automatic transfer switch suitable for normal combination, spare combination, normal spare combination two segment position work, including normal power electromagnetic drive mechanism or spare power electromagnetic drive mechanism, the structure of the same normal power contact arc extinguishing mechanism and spare power contact arc extinguishing mechanism;

[0068] As Figure 8 The normal power electromagnetic drive mechanism or spare power electromagnetic drive mechanism is installed on the mounting plate 6 of the dual power automatic transfer switch, and the normal power electromagnetic drive mechanism or spare power electromagnetic drive mechanism includes a drive electromagnetic iron 203, a transmission connecting rod 202, a transmission lever 201 and an action shaft 205 provided with a transmission gear 206.

[0069] The structure of the normal power contact arc extinguishing mechanism and the spare power contact arc extinguishing mechanism is the same as that of the normal power contact arc extinguishing mechanism and the spare power contact arc extinguishing mechanism of the PC level large current dual power automatic transfer switch with three segment position work, and will not be described here.

[0070] Further arrangement, as Figure 9 The normal power action shaft 205 and the spare power action shaft 405 are provided with a stop mechanism of the dual power automatic transfer switch, the stop mechanism includes a normal power stop rod 208 arranged on the normal power action shaft 205, a spare power stop rod 408 arranged on the spare power action shaft 405, the outer side of the normal power stop rod 208 is provided with a normal power stop shaft 2071, the outer side of the spare power stop rod 408 is provided with a spare power stop shaft 4071, the normal power stop shaft 2071 is fixed on the stop mounting plate 240 outside the normal power stop rod 208 of the dual power automatic transfer switch by two fixed bolts 2072 through the equilateral triangular shaft plate device 207, the spare power stop shaft 4071 is fixed on the stop mounting plate 240 outside the spare power stop rod 408 of the dual power automatic transfer switch by two fixed bolts 4072 through the equilateral triangular shaft plate device 407, so that when the dual power automatic transfer switch is switched, the normal power action shaft 205 or the spare power action shaft 405 will be limited on the stop shaft 2071 or 4071 on the two sides through the normal power stop rod 208 or the spare power stop rod 408, and the power conversion of the dual power automatic transfer switch is completed.

[0071] Further setting, the common power stop lever and the standby power stop lever are set as double-layer structure, the inner layer is for stopping, the outer layer is hinged with the rotating shaft linkage rod 7, so that the common power rotating shaft 205, the standby power rotating shaft 405, the common power stop lever 208, the standby power stop lever 408 and the rotating shaft linkage rod 7 form a parallelogram mechanism, so as to ensure that when the common power is closed, the standby power is in the open state, when the common power is opened, the standby power is in the closed state, so that the internal short circuit accident of the double power automatic transfer switch is avoided, the common power stop lever and the standby power stop lever adopt double-layer structure, the lower layer is used for stopping, and the upper layer is used for rotating shaft linkage rod, which is simple in structure and stable and reliable in work.

[0072] Further setting, the common power rotating shaft or standby power rotating shaft end is provided with a power position indicating lever device, the power position indicating lever device is the same as the common power position indicating lever device and the standby power position indicating lever device of the PC level large current double power automatic transfer switch with three segment working, and the detailed description is not repeated here.

[0073] Further setting, the double power automatic transfer switch is provided with a manual operation handle, when manual operation of the double power automatic transfer switch is needed, the manual operation handle of the double power automatic transfer switch is inserted into the common power position indicator or the standby power position indicator, so that the two working conditions of the double power automatic transfer switch, common closing and standby opening or common opening and standby closing, can be realized, the structure of the double power automatic transfer switch is simplified, and the manual operation is also convenient.

[0074] It should be noted that the above examples are only examples for clearly illustrating the present application, and are not limited to the embodiments, and for those skilled in the art, other different forms of changes or variations can be made on the basis of the above description, which do not need to be exhausted and cannot be exhausted, and the obvious changes or variations still fall within the protection scope of the present application.

Claims

1. A PC-grade high-current dual-power automatic transfer switch, comprising a common power supply electromagnet drive mechanism and a backup power supply electromagnet drive mechanism with identical structures, and a common power supply contact arc extinguishing mechanism and a backup power supply contact arc extinguishing mechanism with identical structures. Its features are: The common power supply electromagnet drive mechanism includes a common power supply drive electromagnet, a common power supply transmission link, a common power supply transmission lever, and a common power supply actuation shaft equipped with a common power supply shaft transmission gear. The backup power electromagnet drive mechanism includes a backup power drive electromagnet, a backup power transmission link, a backup power transmission lever, and a backup power actuation shaft equipped with a backup power shaft transmission gear. The common power drive electromagnet is mounted on the mounting base of the dual power automatic transfer switch. The common power drive electromagnet is equipped with a common power push coil and a common power pull coil. A common power actuation iron core is sleeved inside the common power push coil and the common power pull coil. A common power transmission link is hinged to one end of the common power actuation iron core. The other end of the common power transmission link is hinged to the force application end of the common power transmission lever. A common power lever transmission tooth is provided on the resistance end of the common power transmission lever. The common power lever transmission tooth meshes with a common power shaft transmission gear provided on the common power actuation shaft. The common power lever transmission tooth and the common power shaft transmission gear transmit power with a transmission ratio of less than 1. The backup power drive electromagnet and the main power drive electromagnet are symmetrically arranged on the mounting base of the dual power automatic transfer switch. The backup power drive electromagnet is equipped with a backup power push coil and a backup power pull coil. A backup power actuation iron core is sleeved inside the backup power push coil and the backup power pull coil. A backup power transmission link is hinged to one end of the backup power actuation iron core. The other end of the backup power transmission link is hinged to the force-applying end of the backup power transmission lever. The resistance end of the backup power transmission lever is equipped with a backup power lever transmission tooth. The backup power lever transmission tooth meshes with a backup power shaft transmission gear set on the backup power actuation shaft. The backup power lever transmission tooth and the backup power shaft transmission gear transmit power with a transmission ratio of less than 1. The commonly used power supply contact arc extinguishing mechanism includes a commonly used power supply operating shaft and a commonly used power supply contact four-bar linkage mechanism. The commonly used power supply operating shaft is provided with an upper link of the commonly used power supply contact four-bar linkage mechanism. The upper link of the commonly used power supply contact four-bar linkage mechanism is hinged to a lower link of the commonly used power supply contact four-bar linkage mechanism. The other end of the lower link of the commonly used power supply contact four-bar linkage mechanism is hinged to a commonly used power supply moving contact. Commonly used power supply arc extinguishing covers are provided at the commonly used power supply moving contact and stationary contact. When the commonly used power supply operating shaft is in the closed position, the included angle between the upper link and the lower link of the commonly used power supply contact four-bar linkage mechanism is greater than 180 degrees. The backup power contact arc extinguishing mechanism includes a backup power operating shaft and a backup power contact four-bar linkage mechanism. The backup power operating shaft is provided with an upper link of the backup power contact four-bar linkage mechanism. The upper link of the backup power contact four-bar linkage mechanism is hinged to a lower link of the backup power contact four-bar linkage mechanism. The other end of the lower link of the backup power contact four-bar linkage mechanism is hinged to a backup power moving contact. Backup power arc extinguishing covers are provided at the backup power moving contact and the stationary contact. When the backup power operating shaft is in the closed position, the included angle between the upper link and the lower link of the backup power contact four-bar linkage mechanism is greater than 180 degrees. The commonly used power moving contact and the backup power moving contact adopt a multi-array structure, with two compression springs on each array element; The main power supply operating shaft is equipped with a main power supply stop mechanism, and the backup power supply operating shaft is equipped with a backup power supply stop mechanism. The main power supply operating shaft end is provided with a main power supply position indicator lever device, and the backup power supply operating shaft end is provided with a backup power supply position indicator lever device. An interlocking linkage is provided between the force-applying arm of the commonly used power transmission lever and the force-applying arm of the backup power transmission lever. A spring interlocking device is provided between the main power operating shaft and the backup power operating shaft. The spring interlocking device includes an upper push rod, a lower push rod, a compression spring, a main power interlocking crank, and a backup power interlocking crank. The lower push rod is sleeved inside the upper push rod. A compression spring is sleeved between the upper push rod and the lower push rod. The upper push rod is hinged to the main power operating shaft through the main power interlocking crank, and the lower push rod is hinged to the backup power operating shaft through the backup power interlocking crank. The PC-grade high-current dual-power automatic transfer switch is equipped with a manual operating handle. The manual operating handle can be inserted into the position indicator of the normal power position indicator lever or the position indicator of the backup power position indicator lever to realize the three-stage operation of the dual-power automatic transfer switch: normally closed, standby open, normally open, standby closed, and normally open, standby open.

2. The PC-grade high-current dual-power automatic transfer switch according to claim 1, characterized in that: The common power supply stop mechanism includes a common power supply stop rod mounted on the common power supply actuation shaft, and common power supply stop shafts are provided on both sides of the common power supply stop rod. The common power supply stop shafts are fixed to the stop mounting plate of the dual power supply automatic transfer switch by a shaft plate device in the shape of an equilateral triangle.

3. The PC-grade high-current dual-power automatic transfer switch according to claim 1, characterized in that: The backup power stop mechanism includes a backup power stop rod mounted on the backup power operating shaft, and backup power stop shafts are provided on both sides of the backup power stop rod. The backup power stop shafts are fixed to the stop mounting plate of the dual power automatic transfer switch by a shaft plate device in the shape of an equilateral triangle.

4. The PC-grade high-current dual-power automatic transfer switch according to claim 1, characterized in that: The structure of the power supply position indicator lever device or the backup power supply position indicator lever device is exactly the same, including a position indicator, a fixed wheel, a flat key, and an auxiliary switch lever. The fixed wheel is connected to the power supply operating shaft or the backup power supply operating shaft by the flat key. The position indicator is set on the fixed wheel. The auxiliary switch lever is U-shaped, with one end set at the power supply operating shaft end or the backup power supply operating shaft end, and the other end set as the power supply auxiliary switch lever or the backup power supply auxiliary switch lever. The manual operating handle, by inserting a position indicator, can be moved to different angle positions of the main power supply operating shaft or the backup power supply operating shaft, thereby realizing various operating conditions of manual operation of the dual power supply automatic transfer switch.

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