Fixed high-voltage switch cabinet transmission device and parameter design method thereof

Abstract

The invention discloses a fixed high-voltage switch cabinet transmission device and a parameter design method thereof, the transmission device is a hinge four-bar mechanism composed of a switch crank arm, a special-shaped crank arm, a connecting rod and a rack, and the rotation circle center of the switch crank arm and the rotation circle center of the special-shaped crank arm are located at the two ends of the rack. The two ends of the connecting rod are hinged to the free end of the switch crank arm and one end of the special-shaped crank arm respectively, and a shifting mechanism used for shifting the special-shaped crank arm to rotate when the driving crank arm rotates is arranged between the other end of the special-shaped crank arm and the free end of the driving crank arm. Based on a fixed switch cabinet, a unified transmission scheme is provided, programmed and electric operation among a plurality of components in the switch cabinet is realized, the switch cabinet has good adaptability, and not only can an old switch cabinet be electrically transformed, but also the switch cabinet can be directly adopted in manufacturing of a novel switch cabinet.

Description

Technical Field

[0001] The invention relates to a fixed high-voltage switch cabinet transmission device and also relates to a parameter design method of the fixed high-voltage switch cabinet transmission device. Background Art

[0002] High-voltage switchgear is a type of switchgear and control equipment. It is a high-voltage complete distribution device that assembles related primary and secondary equipment together according to a certain line plan and relevant national standards. It is used to control and protect generators, transformers and high-voltage lines in power plants and substations. It can also be used for starting and protecting large high-voltage AC motors.

[0003] The characteristics of fixed high-voltage switchgear are that the main electrical equipment such as high-voltage circuit breakers are fixedly installed, which has the advantages of reliable connection and reliable power supply. For fixed switchgear, the main components in its typical solution include upper disconnector, upper grounding switch, lower disconnector, lower grounding switch and circuit breaker. At present, there are many manufacturers producing fixed switchgear, and the amount of use is large and wide. The cabinet types and operation methods are not uniform, the installation dimensions of the components inside the switchgear vary greatly, and there are many solutions, so it is quite difficult to realize the electrification operation of fixed switchgear, especially the electrification transformation of old switchgear, and further achieve intelligent operation and control. Summary of the invention

[0004] The first object of the present invention is to provide a fixed high-voltage switch cabinet transmission device that can realize programmed and electric operation between multiple components in the switch cabinet.

[0005] The first object of the present invention is achieved through the following technical measures: a fixed high-voltage switch cabinet transmission device, characterized in that it is a hinged four-bar linkage composed of a switch crank arm, a special-shaped crank arm, a connecting rod and a frame, the rotation centers of the switch crank arm and the special-shaped crank arm are located at the two ends of the frame, the two ends of the connecting rod are respectively hinged to the free end of the switch crank arm and one end of the special-shaped crank arm, and a toggle mechanism is provided between the other end of the special-shaped crank arm and the free end of the driving crank arm for toggling the special-shaped crank arm to rotate when the driving crank arm rotates.

[0006] The present invention is based on a fixed switch cabinet, provides a unified transmission solution, realizes programmed and electric operation between multiple components in the switch cabinet, has good adaptability to the switch cabinet, and can not only be used to electrify the old switch cabinet, but also can be directly used in the manufacture of new switch cabinets.

[0007] The toggle mechanism of the present invention comprises a roller groove arranged on the special-shaped crank arm and a roller arranged on the driving crank arm. The driving crank arm rotates so that the roller enters the roller groove to drive the special-shaped crank arm to rotate.

[0008] The transmission device of the present invention is integrated on the left side of the middle part of the front panel of the switchgear cabinet, which does not interfere with the front door of the switch of the switchgear cabinet and is convenient for manual operation and maintenance.

[0009] The transmission device of the fixed-type high-voltage switchgear cabinet of the present invention includes the transmission devices of the upper earthing switch, the lower earthing switch, the upper disconnector switch and the lower disconnector switch. Each driving crank arm is fixedly installed coaxially with the operating panel, and each driving crank arm is arranged side by side along the axis and evenly distributed along the circumference of the axis.

[0010] The designed rotation angle of the upper earthing switch of the present invention is 60 degrees, the center distance of the switch crank arm is 60 mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75 mm, the opening starting angle of the special-shaped crank arm is 56 degrees, and the length of the connecting rod is 1040.5 mm.

[0011] The designed rotation angle of the lower earthing switch of the present invention is 90 degrees, the center distance of the switch crank arm is 52 mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75 mm, the opening starting angle of the special-shaped crank arm is 23 degrees, and the length of the connecting rod is 883 mm.

[0012] The designed rotation angle of the upper disconnector switch of the present invention is 65 degrees, the center distance of the switch crank arm is 75 mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75 mm, the closing starting angle of the special-shaped crank arm is 69 degrees, and the length of the connecting rod is 857.5 mm.

[0013] The designed rotation angle of the lower disconnector switch of the present invention is 65 degrees, the center distance of the switch crank arm is 75 mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75 mm, the closing starting angle of the special-shaped crank arm is 52 degrees, and the length of the connecting rod is 1114.5 mm.

[0014] The second object of the present invention is to provide a parameter design method for the above-mentioned transmission device of the fixed-type high-voltage switchgear cabinet, which can provide unified parameter design for the programmed and electrified operation among multiple components in the switchgear cabinet.

[0015] The second object of the present invention is achieved by the following technical measures: A parameter design method for the above-mentioned transmission device of the fixed-type high-voltage switchgear cabinet, which is characterized by including the following steps:

[0016] S1. Determine the center position of the closing and opening rotation of the switch according to the designed structural layout of the switchgear cabinet;

[0017] S2. Based on the center position of the rotation of the switch's closing and opening, with the known designed rotation angle of the switch, define the center distance of the switch toggle arm, and obtain the center position and rotation angle of the switch toggle arm's rotation.

[0018] S3. Confirm the center position of the rotation of the operation panel according to the operation requirements of the switch cabinet.

[0019] S4. Determine the center position of the rotation of the special-shaped toggle arm according to the distance between the special-shaped toggle arm and the center of rotation of the operation panel, and rotate the driving toggle arm to drive the special-shaped toggle arm to rotate to determine the rotation angle of the special-shaped toggle arm.

[0020] S5. The switch toggle arm, connecting rod, special-shaped toggle arm, and the rotation centers of the switch toggle arm and the special-shaped toggle arm form a hinge four-bar mechanism. Conduct force analysis and optimization design to determine the center distance of the special-shaped toggle arm, the starting angle of the special-shaped toggle arm's opening / closing, and the length of the connecting rod.

[0021] S6. Draw the kinematic schematic diagram of the hinge four-bar mechanism.

[0022] The rotation angle of the special-shaped toggle arm described in the present invention is the theoretical design value minus the deformation of the rod and the machining tolerance. If the switch cannot be fully closed or opened at this time, adjust the length of the connecting rod until the switch is fully closed or opened.

[0023] Compared with the prior art, the present invention has the following remarkable effects:

[0024] ⑴ Based on the fixed switch cabinet, the present invention provides a unified transmission scheme, realizes the programmed and electrified operation among multiple components in the switch cabinet, has good adaptability to the switch cabinet, and can not only perform electrified transformation on the old switch cabinet, but also be directly adopted in the manufacture of new switch cabinets.

[0025] ⑵ The present invention provides the design parameters of interchangeable parts for the design, trial production, and mass production of the transmission device. The processing parts of the transmission device are unified, saving investment and equipment costs.

[0026] ⑶ According to the changes in spatial position and design requirements, the present invention can arbitrarily perform sequential combined operations of the upper earthing switch, lower earthing switch, upper isolating switch, and lower isolating switch, and is easy to achieve modular and programmed operations, that is: a 90-degree rotation of the operation panel is an operation unit, and the transmission device can be used as a separate module to operate a single switch. A 360-degree rotation of the same operation panel can sequentially operate four switch units, covering other schemes including typical schemes, such as: an isolating cabinet with only an isolating switch installed, an incoming line cabinet without a lower earthing switch, etc.

[0027] ⑷ The present invention provides a parameter design method for a unified transmission device to achieve programmed and electrified operation among multiple components in a switchgear. For the transmission devices of the upper earthing switch, lower earthing switch, upper disconnector, and lower disconnector, except for the different starting and final positions of the angles output by the special-shaped crank arms, the lengths of the connecting rods and the types of switches are different, and the other parameter designs are the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 is a side view of the transmission device of the present invention installed in a fixed high-voltage switchgear;

[0030] Figure 2 is a schematic diagram of the upper earthing switch of the present invention in the closed position;

[0031] Figure 3 is a schematic diagram of the upper earthing switch of the present invention in the open position;

[0032] Figure 4 is a schematic diagram of the lower earthing switch of the present invention in the closed position;

[0033] Figure 5 is a schematic diagram of the lower earthing switch of the present invention in the open position;

[0034] Figure 6 is a schematic diagram of the upper disconnector of the present invention in the open position;

[0035] Figure 7 is a schematic diagram of the upper disconnector of the present invention in the closed position;

[0036] Figure 8 is a schematic diagram of the lower disconnector of the present invention in the open position;

[0037] Figure 9 is a schematic diagram of the lower disconnector of the present invention in the closed position.

[0038] In the figure: 1 - upper earthing switch and its drive device; 1.1 - upper earthing switch; 1.2 - first switch crank arm; 1.3 - first connecting rod; 1.4 - first special-shaped crank arm; 1.4.1 - first roller groove; 1.5 - first drive crank arm; 1.5.1 - first roller; 1.6 - first operating disc; 1.7 - first operating rod; 2 - lower earthing switch and its drive device; 2.1 - lower earthing switch; 2.2 - second switch crank arm; 2.3 - second connecting rod; 2.4 - second special-shaped crank arm; 2.4.1 - second roller groove; 2.5 - second drive crank arm; 2.5.1 - second roller; 2.6 - second operating disc; 2.7 - second operating rod; 3 - upper disconnector and its drive device; 3.1 - upper disconnector; 3.2 - third switch crank arm; 13.3 - third connecting rod; 3.4 - third special-shaped crank arm; 3.4.1 - third roller groove; 3.5 - third drive crank arm; 3.5.1 - third roller; 3.6 - third operating disc; 3.7 - third operating rod; 4 - lower disconnector and its drive device; 4.1 - lower disconnector; 4.2 - fourth switch crank arm; 4.3 - fourth connecting rod; 4.4 - fourth special-shaped crank arm; 4.4.1 - fourth roller groove; 4.5 - fourth drive crank arm; 4.5.1 - fourth roller; 4.6 - fourth operating disc; 4.7 - fourth operating rod. Specific embodiments

[0039] The present invention will be described in detail below in conjunction with the embodiments and their accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the protection scope of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative labor on the premise of not departing from the inventive concept of the present invention belong to the protection scope of the present invention.

[0040] As Figure 1 shown, a transmission device of a fixed-type high-voltage switch cabinet according to the present invention is composed of four parts, namely: an upper earthing switch and its drive device 1, a lower earthing switch and its drive device 2, an upper disconnector and its drive device 3, and a lower disconnector and its drive device 4. The transmission device is integrated at the middle left position of the front panel of the switch cabinet, does not interfere with the front door of the switch cabinet of the switch cabinet, and is convenient for manual operation and maintenance.

[0041] As Figure 2 、 Figure 3As shown, the upper grounding switch and its transmission device 1, the transmission device is a hinged four-bar linkage consisting of a first switch crank arm 1.2, a first special-shaped crank arm 1.4, a first connecting rod 1.3 and a frame, the rotation centers of the first switch crank arm 1.2 and the first special-shaped crank arm 1.4 are located at the two ends of the frame, the two ends of the first connecting rod 1.3 are respectively hinged with the free end of the first switch crank arm 1.2 and one end of the first special-shaped crank arm 1.4, and a toggle mechanism for toggling the first special-shaped crank arm 1.4 to rotate when the first driving crank arm 1.5 is rotated is provided between the other end of the first special-shaped crank arm 1.4 and the free end of the first driving crank arm 1.5. The toggle mechanism includes a first roller groove 1.4.1 provided on the first special-shaped crank arm 1.4 and a first roller 1.5.1 provided on the first driving crank arm 1.5, the first driving crank arm 1.5 rotates so that the first roller 1.5.1 enters the first roller groove 1.4.1 to drive the first special-shaped crank arm 1.4 to rotate. The first driving crank arm 1.5 is coaxially mounted with the first operating disk 1.6, and an operating hole for inserting the first operating rod 1.7 is provided on the first operating disk 1.6.

[0042] like Figure 4 , Figure 5 As shown, the lower grounding switch and its transmission device 2, the transmission device is a hinged four-bar linkage consisting of a second switch crank arm 2.2, a second special-shaped crank arm 2.4, a second connecting rod 2.3 and a frame, the rotation center of the second switch crank arm 2.2 and the second special-shaped crank arm 2.4 is located at both ends of the frame, the two ends of the second connecting rod 2.3 are respectively hinged with the free end of the second switch crank arm 2.2 and one end of the second special-shaped crank arm 2.4, and a toggle mechanism for toggling the second special-shaped crank arm 2.4 to rotate when the second driving crank arm 2.5 rotates is provided between the other end of the second special-shaped crank arm 2.4 and the free end of the second driving crank arm 2.5. The toggle mechanism includes a second roller groove 2.4.1 provided on the second special-shaped crank arm 2.4 and a second roller 2.5.1 provided on the second driving crank arm 2.5, and the second driving crank arm 2.5 rotates so that the second roller 2.5.1 enters the second roller groove 2.4.1 to drive the second special-shaped crank arm 2.4 to rotate. The second driving crank arm 2.5 is coaxially mounted with the second operating disk 2.6, and the second operating disk 2.6 is provided with an operating hole for inserting the second operating rod 2.7.

[0043] like Figure 6 , Figure 7As shown, the upper isolating switch and its transmission device 3, the transmission device is a hinged four-bar linkage consisting of a third switch crank arm 3.2, a third special-shaped crank arm 3.4, a third connecting rod 3.3 and a frame, the rotation centers of the third switch crank arm 3.2 and the third special-shaped crank arm 3.4 are located at the two ends of the frame, the two ends of the third connecting rod 3.3 are respectively hinged with the free end of the third switch crank arm 3.2 and one end of the third special-shaped crank arm 3.4, and a toggle mechanism for toggling the third special-shaped crank arm 3.4 to rotate when the third driving crank arm 3.5 is rotated is provided between the other end of the third special-shaped crank arm 3.4 and the free end of the third driving crank arm 3.5. The toggle mechanism includes a third roller groove 3.4.1 provided on the third special-shaped crank arm 3.4 and a third roller 3.5.1 provided on the third driving crank arm 3.5, and the third driving crank arm 3.5 rotates so that the third roller 3.5.1 enters the third roller groove 3.4.1 to drive the third special-shaped crank arm 3.4 to rotate. The third driving crank arm 3.5 is coaxially mounted with the third operating disk 3.6, and the third operating disk 3.6 is provided with an operating hole for inserting the third operating rod 3.7.

[0044] like Figure 8 , Figure 9 As shown, the lower disconnector and its transmission device 4, the transmission device is a hinged four-bar linkage consisting of a fourth switch crank arm 4.2, a fourth special-shaped crank arm 4.4, a fourth connecting rod 4.3 and a frame, the rotation centers of the fourth switch crank arm 4.2 and the fourth special-shaped crank arm 4.4 are located at the two ends of the frame, the two ends of the fourth connecting rod 4.3 are respectively hinged with the free end of the fourth switch crank arm 4.2 and one end of the fourth special-shaped crank arm 4.4, and a toggle mechanism for toggling the fourth special-shaped crank arm 4.4 to rotate when the fourth driving crank arm 4.5 is rotated is provided between the other end of the fourth special-shaped crank arm 4.4 and the free end of the fourth driving crank arm 4.5. The toggle mechanism includes a fourth roller groove 4.4.1 provided on the fourth special-shaped crank arm 4.4 and a fourth roller 4.5.1 provided on the fourth driving crank arm 4.5, and the fourth driving crank arm 4.5 rotates so that the fourth roller 4.5.1 enters the fourth roller groove 4.4.1 to drive the fourth special-shaped crank arm 4.4 to rotate. The fourth driving crank arm 4.5 is coaxially mounted with the fourth operating disk 4.6, and an operating hole for inserting the fourth operating rod 4.7 is provided on the fourth operating disk 4.6.

[0045] The transmission device of the present invention comprises a transmission device of an upper grounding switch, a lower grounding switch, an upper isolating switch and a lower isolating switch, each driving crank arm is coaxially fixedly installed with an operating disk, each driving crank arm is arranged in parallel along the axial direction and evenly distributed along the circumference of the shaft, the first, second, third and fourth operating disks are the same operating disk, and the first, second, third and fourth operating rods are the same operating rod.

[0046] A parameter design method for the above-mentioned fixed high-voltage switch cabinet transmission device comprises the following steps:

[0047] S1. Determine the center position of the closing and opening rotation of the switch according to the design structure layout of the switch cabinet;

[0048] S2. According to the center position of the closing and opening rotation of the switch, given the designed rotation angle of the switch, define the center distance of the switch crank arm, and obtain the center position and rotation angle of the switch crank arm rotation;

[0049] S3. Confirm the rotation center position of the operation panel according to the operation requirements of the switch cabinet;

[0050] S4. Determine the rotation center position of the special-shaped crank arm according to the distance between the special-shaped crank arm and the rotation center of the operation panel, and rotate the driving crank arm to make the roller on it roll along the roller groove of the special-shaped crank arm to determine the rotation angle of the special-shaped crank arm;

[0051] S5. The switch crank arm, connecting rod, special-shaped crank arm and the rotation centers of the switch crank arm and the special-shaped crank arm form a planar hinge four-bar mechanism. According to the needs of the structural design and the force analysis of the rods, confirm the center distance of the special-shaped crank arm, the starting angle of opening / closing of the special-shaped crank arm, and the length of the connecting rod;

[0052] S6. Draw the kinematic diagram of the hinge four-bar mechanism.

[0053] The rotation angle of the special-shaped crank arm is the theoretical design value minus the rod deformation and machining tolerance. If the switch cannot be opened or closed in place at this time, adjust the length of the connecting rod until the switch is opened and closed in place.

[0054] Determine the installation positions of the upper earthing switch, lower earthing switch, upper disconnector and lower disconnector; the installation position of the transmission device. And determine: the rotation angle, starting position and final position of the operating rod, the size of the operation panel and its rotation center position, the rotation center position of the driving crank arm, the rotation angle, the diameter of the roller installed on the driving crank arm, the distance between the center of the roller and the rotation center of the driving crank arm, the rotation center position of the special-shaped crank arm (the distance between the rotation center of the driving crank arm and the rotation center of the special-shaped crank arm), the radius and size of the roller groove, the output angle and output radius of the special-shaped crank arm.

[0055] Under the above known conditions, draw the design drawing:

[0056] ⑴ Based on the center position and angle of rotation for the closing and opening of the upper earthing switch, determine the center position and angle of rotation of the switch toggle arm. According to the center position of the special-shaped toggle arm rotation and the output angle of the special-shaped toggle arm, draw the kinematic diagram of the four-bar linkage structure on the graph, form a planar hinge four-bar linkage mechanism, conduct force analysis and optimization design, determine the starting position and final position of the special-shaped toggle arm rotation, the length of the connecting rod, and the length of the switch toggle arm, ensuring that the closing and opening of the upper earthing switch meet the requirements. Further, when the upper earthing switch is in the open position, the special-shaped toggle arm rotates past the dead center position, achieving the effect that when the upper earthing switch is under vibration or other external forces, only the special-shaped toggle arm rotates in the reverse direction to enable operation, preventing the accidental closing of the upper earthing switch.

[0057] ⑵ Based on the center position and angle of rotation for the closing and opening of the lower earthing switch, determine the center position and angle of rotation of the switch toggle arm. According to the center position of the special-shaped toggle arm rotation and the output angle of the special-shaped toggle arm, draw the kinematic diagram of the four-bar linkage structure on the graph, form a planar hinge four-bar linkage mechanism, conduct force analysis and optimization design, determine the starting position and final position of the special-shaped toggle arm rotation, the length of the connecting rod, and the length of the switch toggle arm, ensuring that the closing and opening of the lower earthing switch meet the requirements. Furthermore, when the lower earthing switch with a spring is operated, the force of the spring is not transmitted to the operating rod, causing a force impact on the transmission device, that is: ensure the rotation angle of the lower earthing switch toggle arm.

[0058] ⑶ Based on the center position and angle of rotation for the closing and opening of the upper disconnector, determine the center position and angle of rotation of the switch toggle arm. According to the center position of the special-shaped toggle arm rotation and the output angle of the special-shaped toggle arm, draw the kinematic diagram of the four-bar linkage structure on the graph, form a planar hinge four-bar linkage mechanism, conduct force analysis and optimization design, determine the starting position and final position of the special-shaped toggle arm rotation, the length of the connecting rod, and the length of the switch toggle arm, ensuring that the closing and opening of the upper disconnector meet the requirements.

[0059] ⑷ Based on the center position and angle of rotation for the closing and opening of the lower disconnector, determine the center position and angle of rotation of the switch toggle arm. According to the center position of the special-shaped toggle arm rotation and the output angle of the special-shaped toggle arm, draw the kinematic diagram of the four-bar linkage structure on the graph, form a planar hinge four-bar linkage mechanism, conduct force analysis and optimization design, determine the starting position and final position of the special-shaped toggle arm rotation, the length of the connecting rod, and the length of the switch toggle arm, ensuring that the closing and opening of the lower disconnector meet the requirements.

[0060] Example:

[0061] See Figure 2, it is the closing position of the earthing switch 1.1 on the fixed high-voltage switchgear. When the first operating rod 1.7 is rotated upward by 90 degrees, the first operating disk 1.6 is rotated counterclockwise by 90 degrees. The first driving crank 1.5, which has the same rotation center as the first operating disk and is connected as a whole, is rotated counterclockwise by 90 degrees. The first roller 1.5.1 mounted on the first driving crank 1.5 is simultaneously rotated counterclockwise and rolls in the first roller groove 1.4.1 of the special-shaped crank 1.4, driving the first special-shaped crank 1.4 to rotate clockwise by 80 degrees. The first special-shaped crank 1.4 drives the first connecting rod 1.3 to move, and the first connecting rod 1.3 drives the first switch crank 1.2 to rotate clockwise by 60 degrees, and the upper earthing switch 1.1 completes the opening operation. See Figure 3 , the upper earthing switch 1.1 is in the open position. Conversely, when the upper earthing switch 1.1 completes the closing operation and is in the closing position, the opening and closing operations of the upper earthing switch 1.1 are completed. When the upper earthing switch 1.1 is in the open position, the first special-shaped crank 1.4 rotates past the dead center position, that is: the final position of the special-shaped crank 1.4 exceeds the connection line between the rotation center of the upper earthing switch 1.1 and the rotation center of the first special-shaped crank 1.4, achieving the effect that only the first special-shaped crank 1.4 can rotate when the upper earthing switch 1.1 is under vibration or other external forces, preventing the upper earthing switch 1.1 from accidentally closing.

[0062] Under the above-known conditions, draw the design drawing:

[0063] ⑴ As Figure 2 , Figure 3 shown, according to the design structure layout of the switchgear, the center position of the rotation of the upper earthing switch 1.1 for closing and opening can be determined. It is known that the designed rotation angle of the upper earthing switch 1.1 is 60 degrees, and the center distance of the first switch crank 1.2 is defined as 60 mm. According to the operating requirements of the switchgear, the rotation center position of the first operating disk 1.6 is confirmed. The rotation angle of the first operating rod 1.7 is 90 degrees and is symmetric up and down. The distance between the rotation center of the first special-shaped crank 1.4 and the first operating disk 1.6 is 90 mm. Rotate the first driving crank 1.5, and the first roller 1.5.1 on it rolls in the first roller groove 1.4.1 of the first special-shaped crank 1.4, obtaining that the rotation angle of the first special-shaped crank 1.4 is 80 degrees. The first switch crank 1.2, the first connecting rod 1.3, the first special-shaped crank 1.4 and the rotation centers of the first switch crank 1.2 and the first special-shaped crank 1.4 together form a hinge four-bar linkage. According to the needs of the structural design and the force analysis of the rods, it is confirmed that the center distance of the first special-shaped crank 1.4 is 75 mm, the starting angle of the first special-shaped crank 1.4 for opening is 56 degrees, which falls in the third quadrant, and the length of the first connecting rod 1.3 is 1040.5 mm. Draw the kinematic schematic diagram of the hinge four-bar linkage on the drawing.

[0064] ⑵ As Figure 4 , Figure 5As shown in the figure, the center position of the rotation of the lower earthing switch 2.1 for closing and opening can be determined according to the designed structural layout of the switch cabinet. It is known that the designed rotation angle of the lower earthing switch 2.1 is 90 degrees. The center distance of the second switch crank arm 2.2 is defined as 52 mm. Using the same parameter design method as in (1), the length of the second connecting rod 2.3 is confirmed to be 883 mm. The starting angle of opening of the second special-shaped crank arm 2.4 is 23 degrees, falling in the third quadrant. The remaining parameters are the same. Draw the kinematic diagram of the hinge four-bar mechanism on the drawing.

[0065] ⑶ As Figure 6 、 Figure 7 As shown in the figure, the center position of the rotation of the upper disconnector 3.1 for closing and opening can be determined according to the designed structural layout of the switch cabinet. It is known that the designed rotation angle of the upper disconnector 3.1 is 65 degrees. The center distance of the third switch crank arm 3.2 is defined as 75 mm. Using the same parameter design method as in (1), the length of the third connecting rod 3.3 is confirmed to be 857.5 mm. The starting angle of closing of the third special-shaped crank arm 4.4 is 69 degrees, falling in the third quadrant. The remaining parameters are the same. Draw the kinematic diagram of the hinge four-bar mechanism on the drawing.

[0066] ⑷ As Figure 8 、 Figure 9 As shown in the figure, the center position of the rotation of the lower disconnector 4.1 for closing and opening can be determined according to the designed structural layout of the switch cabinet. It is known that the designed rotation angle of the lower disconnector 4.1 is 65 degrees. The center distance of the fourth switch crank arm 4.2 is defined as 75 mm. Using the same parameter design method as in (1), the length of the fourth connecting rod 4.3 is confirmed to be 1114.5 mm. The starting angle of closing of the fourth special-shaped crank arm 4.4 is 52 degrees, falling in the third quadrant. The remaining parameters are the same. Draw the kinematic diagram of the hinge four-bar mechanism on the drawing.

[0067] The specific design parameters are shown in Table 1 (length unit: mm)

[0068]

[0069] (Table 1).

Claims

1. A fixed high-voltage switch cabinet transmission device, characterized in that: It is a hinged four-bar linkage composed of a switch crank arm, a special-shaped crank arm, a connecting rod and a frame. The rotation centers of the switch crank arm and the special-shaped crank arm are located at the two ends of the frame. The two ends of the connecting rod are respectively hinged to the free end of the switch crank arm and one end of the special-shaped crank arm. A toggle mechanism is provided between the other end of the special-shaped crank arm and the free end of the driving crank arm, which is used to toggle the special-shaped crank arm to rotate when the driving crank arm rotates.

2. The fixed high-voltage switch cabinet transmission device according to claim 1 is characterized in that: The toggle mechanism comprises a roller groove arranged on the special-shaped crank arm and a roller arranged on the driving crank arm. The driving crank arm rotates so that the roller enters the roller groove to drive the special-shaped crank arm to rotate.

3. The fixed high-voltage switch cabinet transmission device according to claim 2 is characterized in that: The transmission device is integrated at the left side of the middle of the front panel of the switch cabinet.

4. The fixed high-voltage switch cabinet transmission device according to claim 3 is characterized in that: The fixed high-voltage switch cabinet transmission device includes transmission devices for an upper grounding switch, a lower grounding switch, an upper isolating switch and a lower isolating switch. Each driving crank arm is coaxially fixedly installed with the operating panel. Each driving crank arm is arranged in parallel along the axial direction and evenly distributed along the circumference of the shaft.

5. The fixed high-voltage switch cabinet transmission device according to claim 4 is characterized in that: The designed rotation angle of the upper grounding switch is 60 degrees, the center distance of the switch crank arm is 60 mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75 mm, the opening starting angle of the special-shaped crank arm is 56 degrees, and the length of the connecting rod is 1040.5 mm.

6. The fixed high-voltage switch cabinet transmission device according to claim 5 is characterized in that: The designed rotation angle of the lower grounding switch is 90 degrees, the center distance of the switch arm is 52mm, the rotation angle of the special-shaped arm is 80 degrees, the center distance of the special-shaped arm is 75mm, the opening starting angle of the special-shaped arm is 23 degrees, and the length of the connecting rod is 883mm.

7. The fixed high-voltage switch cabinet transmission device according to claim 6, characterized in that: The designed rotation angle of the upper disconnector is 65 degrees, the center distance of the switch crank arm is 75mm, the rotation angle of the special-shaped crank arm is 80 degrees, the center distance of the special-shaped crank arm is 75mm, the closing starting angle of the special-shaped crank arm is 69 degrees, and the length of the connecting rod is 857.5mm.

8. The fixed high-voltage switch cabinet transmission device according to claim 7 is characterized in that: The designed rotation angle of the lower disconnector is 65 degrees, the center distance of the switch arm is 75mm, the rotation angle of the special-shaped arm is 80 degrees, the center distance of the special-shaped arm is 75mm, the closing starting angle of the special-shaped arm is 52 degrees, and the length of the connecting rod is 1114.5mm.

9. A parameter design method for a fixed high-voltage switchgear transmission device according to any one of claims 1 to 8, characterized in that The following steps are involved: S1. Determine the center position of the switch's closing and opening rotation according to the design structure layout of the switch cabinet; S2. According to the center position of the switch's closing and opening rotation, the design rotation angle of the switch is known, the center distance of the switch arm is defined, and the center position and rotation angle of the switch arm are obtained; S3. Confirm the rotation center position of the operating panel according to the operating requirements of the switch cabinet; S4, according to the distance between the special-shaped crutch arm and the rotation center of the operating panel, determine the center position of the rotation of the special-shaped crutch arm, and rotate the driving crutch arm to drive the special-shaped crutch arm to rotate, and determine the rotation angle of the special-shaped crutch arm; S5. The switch arm, connecting rod, special-shaped arm and the rotation center of the switch arm and the special-shaped arm form a plane hinge four-bar linkage. Force analysis and optimization design are carried out to determine the center distance of the special-shaped arm, the starting angle of the special-shaped arm opening / closing, and the length of the connecting rod; S6. Draw a simple motion diagram of the hinged four-bar linkage.

10. The parameter design method according to claim 9, characterized in that: The rotation angle of the special-shaped crank arm is the theoretical design value minus the deformation of the rod and the processing tolerance. If the switch is not opened or closed in place at this time, adjust the length of the connecting rod until the switch is opened or closed in place.

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