Switch structure of quick circuit breaker

Abstract

The invention relates to a switch structure of a quick circuit breaker. The switch structure comprises an arc extinguish chamber and a driving mechanism, the driving mechanism comprises a main pull rod, a linkage sleeve and a crank linkage rod, the main pull rod is vertically arranged, and the top of the main pull rod is connected with the moving contact; the linkage sleeve is arranged on the main pull rod in a sleeving mode and can synchronously move up and down along with the main pull rod, and the linkage sleeve is of an I-shaped structure and comprises a straight cylinder part and end plate parts located at the two ends of the straight cylinder part; the crank linkage rod is perpendicular to the main pull rod, a crank arm I of the crank linkage rod is in sliding fit with the outer wall of the straight cylinder part, and a crank arm II of the crank linkage rod is matched with the closing buffer part and the opening buffer part respectively; in a switching-on state, the end part of the crank arm I is positioned at the lower end of the straight cylinder part; and in an opening state, the end part of the crank arm I is positioned at the upper end of the straight cylinder part. According to the invention, the motion quality of the single-phase mechanical switch at the early stage of opening and closing actions can be reduced, so that the opening and closing speed of the circuit breaker is effectively improved, and the purpose of quickly switching on and off current is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fast circuit breakers, and in particular relates to a fast circuit breaker switch structure. Background Art

[0002] The fast switch series products are key equipment developed to address the problem of excessive short-circuit current in ultra-high voltage power grids. They can avoid the large investment caused by large-scale replacement of circuit breakers, while improving the reliability of system operation. As the capacity of the power grid continues to increase, the problem of excessive short-circuit current in many areas is serious. Traditional restrictive measures such as adjusting the power grid structure, installing fixed reactors, and using high-impedance transformers have adverse effects on system stability, loss, investment, etc., and it is urgent to develop fast fault current limiting technology suitable for engineering applications.

[0003] The existing 126kV fast circuit breaker not only has an overall structural load, but also has a large moving mass of the single-phase mechanical switch during opening and closing operations, which directly affects the opening and closing speed of the circuit breaker, making it impossible to achieve the purpose of quickly switching on and off the current. Summary of the invention

[0004] The object of the present invention is to provide a fast circuit breaker switch structure to solve the problem of slow opening and closing speed.

[0005] A fast circuit breaker switch structure of the present invention is implemented as follows:

[0006] A fast circuit breaker switch structure comprises an arc extinguishing chamber, and a driving mechanism arranged at the bottom of the arc extinguishing chamber and connected to a moving contact in the arc extinguishing chamber;

[0007] The driving mechanism comprises

[0008] A main pull rod is arranged vertically, and the top of the main pull rod is connected to the moving contact;

[0009] A linkage sleeve, which is sleeved on the main pull rod and can move up and down synchronously with the main pull rod, and the linkage sleeve is an I-shaped structure, which includes a straight tube part and end plate parts located at both ends of the straight tube part;

[0010] A crank linkage rod, which is arranged vertically with the main pull rod, wherein the crank arm I of the crank linkage rod is attached to the outside of the straight tube portion and slidably cooperates with the outer wall of the straight tube portion, and the crank arm II of the crank linkage rod cooperates with the closing buffer and the opening buffer respectively;

[0011] In the closed state, the end of the curved arm I is located at the lower end of the straight tube part; in the open state, the end of the curved arm I is located at the upper end of the straight tube part.

[0012] Furthermore, the crank linkage rod comprises a linkage rod body arranged perpendicularly to the main pull rod, and the crank arm I and crank arm II are both mounted on the linkage rod body and can rotate along with the linkage rod body.

[0013] Furthermore, the curved arm I is provided in a pair and is respectively provided on both sides of the straight tube portion;

[0014] A flat section is arranged on the outer wall of the straight tube portion at a position where the straight tube portion cooperates with the curved arm I.

[0015] Furthermore, at least one crank arm II is provided and is located at any end of the linkage rod body.

[0016] Furthermore, the impacted heads of the closing buffer component and the opening buffer component are arranged opposite to each other, and the end of the curved arm II is located between the closing buffer component and the opening buffer component.

[0017] Furthermore, the driving mechanism also includes a repulsion disk connected to the lower end of the main pull rod, and an opening coil cooperating with the repulsion disk is arranged above the repulsion disk, and a closing coil cooperating with the repulsion disk is arranged below the repulsion disk.

[0018] Furthermore, the main pull rod is sleeved with a repulsion plate mounting sleeve located below the linkage sleeve, the repulsion plate is mounted on the lower end of the repulsion plate mounting sleeve, an upper adjusting nut mounted on the main pull rod is arranged above the linkage sleeve, and a lower adjusting nut mounted on the main pull rod is arranged below the repulsion plate.

[0019] Furthermore, the driving mechanism also includes an upper mounting plate, two fixed vertical plates arranged opposite to each other are installed between the upper mounting plate and the bottom plate of the arc extinguishing chamber, the crank linkage rod is rotatably mounted on the two fixed vertical plates, and the crank arm I is located between the two fixed vertical plates, and the crank arm II is located on the outside of the fixed vertical plates.

[0020] Furthermore, a supporting vertical plate is arranged between the upper mounting plate and the bottom plate of the arc extinguishing chamber, and the closing buffer component and the opening buffer component are respectively installed on two of the supporting vertical plates that are arranged opposite to each other.

[0021] Further, the driving mechanism also includes a lower mounting plate located below the upper mounting plate, the repulsion plate is located between the upper mounting plate and the lower mounting plate, the opening coil is installed on the lower side of the upper mounting plate, and the closing coil is installed on the upper side of the lower mounting plate;

[0022] A switch opening and closing holding component is arranged between the upper mounting plate and the lower mounting plate and is located at the periphery of the repulsion disk and connected to the repulsion disk.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects:

[0024] (1) The overall structure of the present invention is simple. It adopts an I-shaped linkage sleeve and a crank linkage rod to realize the coordination between the single-phase mechanical switch and the buffer member, which can reduce the movement mass of the single-phase mechanical switch in the early stage of the opening and closing action, thereby effectively improving the opening and closing speed of the circuit breaker and achieving the purpose of quickly switching on and off the current;

[0025] (2) The present invention can enlarge the opening and closing buffer stroke by setting the crank linkage rod, thereby avoiding the problem of difficulty in selecting the buffer component and easy damage caused by short buffer stroke and high buffer energy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 is a structural diagram of a fast circuit breaker switch structure from a first perspective of a preferred embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A magnified view of part A;

[0029] Figure 3 is a structural diagram of the driving mechanism part of the fast circuit breaker switch structure of the preferred embodiment of the present invention from a second viewing angle;

[0030] Figure 4 It is a front view of the driving mechanism part of the fast circuit breaker switch structure of the preferred embodiment of the present invention;

[0031] Figure 5 yes Figure 4 Cross-section along the middle BB direction;

[0032] Figure 6 It is a right side view of the driving mechanism part of the fast circuit breaker switch structure of the preferred embodiment of the present invention;

[0033] Figure 7 yes Figure 6 Cross-section of the middle CC section;

[0034] Figure 8 It is a structural diagram of the first perspective of the cooperation between a single-phase mechanical switch and a crank linkage rod of a fast circuit breaker switch structure of a preferred embodiment of the present invention;

[0035] Fig. 9 It is a structural diagram of the cooperation between a single-phase mechanical switch and a crank linkage rod of a fast circuit breaker switch structure of a preferred embodiment of the present invention from a second viewing angle;

[0036] In the figure: arc extinguishing chamber 1, main pull rod 2, linkage sleeve 3, straight tube part 3-1, end plate part I3-2, end plate part II3-3, flat section 3-4, lug 3-5, crank linkage rod 4, crank arm I4-1, crank arm II4-2, linkage rod body 4-3, assembly sleeve 4-4, key 4-5, fixed end plate 4-6, closing buffer 5, opening buffer 6, repulsion disk 7, opening coil 8, closing coil 9, repulsion disk mounting sleeve 10, upper adjusting nut 11, lower adjusting nut 12, upper mounting plate 13, fixed vertical plate 14, supporting vertical plate 15, lower mounting plate 16, opening coil seat 17, closing coil seat 18, upper notch 19, lower notch 20, opening and closing holding assembly 21. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-9 As shown, a fast circuit breaker switch structure includes an arc extinguishing chamber 1, and a driving mechanism arranged at the bottom of the arc extinguishing chamber 1 and connected to the moving contact in the arc extinguishing chamber 1; the driving mechanism includes a main pull rod 2, a linkage sleeve 3 and a crank linkage rod 4, the main pull rod 2 is arranged vertically, and the top of the main pull rod 2 is connected to the moving contact; the linkage sleeve 3 is sleeved on the main pull rod 2 and can move up and down synchronously with the main pull rod 2, and the linkage sleeve 3 is an I-shaped structure, which includes a straight barrel portion 3-1 and a crank linkage rod 4 located at the straight barrel portion. The end plate portions at both ends of the straight tube portion 3-1; the crank linkage rod 4 is arranged vertically with the main pull rod 2, the crank arm I4-1 of the crank linkage rod 4 is attached to the outside of the straight tube portion 3-1 and slidably cooperates with the outer wall of the straight tube portion 3-1, and the crank arm II4-2 of the crank linkage rod 4 cooperates with the closing buffer 5 and the opening buffer 6 respectively; when the switch is closed, the end of the crank arm I4-1 is located at the lower end of the straight tube portion 3-1; when the switch is open, the end of the crank arm I4-1 is located at the upper end of the straight tube portion 3-1.

[0040] A moving contact and a stationary contact (not shown in the figure) are arranged in the arc extinguishing chamber 1. The closing of the circuit breaker switch is achieved by the engagement of the moving contact and the opening of the circuit breaker switch is achieved by the separation of the moving contact and the stationary contact. The main pull rod 2 of the driving mechanism is connected to the moving contact. When the main pull rod 2 moves upward, it can drive the moving contact and the stationary contact to engage with each other to achieve closing. When the main pull rod 2 moves downward, it can drive the moving contact and the stationary contact to separate to achieve opening.

[0041] Among them, the main pull rod 2, the driving part that drives the main pull rod 2 (i.e., the repulsion disk 7), and the part that moves up and down synchronously with the main pull rod 2 (i.e., the linkage sleeve 3) are the single-phase mechanical switches of the circuit breaker switch, and the crank linkage rod 4 is used to realize the coordination between the single-phase mechanical switch and the buffer part, thereby achieving a buffering effect during the opening and closing process.

[0042] Specifically, when the circuit breaker switch is in the closed state, the end of the curved arm II 4-2 cooperates with the closing buffer 5, and is subjected to the reverse force of the impact head of the closing buffer 5, so that the end of the curved arm I 4-1 is located at the lower end of the straight tube part 3-1, that is, it is in contact with the upper surface of the end plate part I 3-2 at the lower end of the straight tube part 3-1. When the main pull rod 2 is operated to move downward for opening operation, since there is a certain distance between the end of the crank arm Ⅰ4-1 and the end plate part Ⅱ3-3 at the upper end of the straight tube part 3-1, when the main pull rod 2 drives the linkage sleeve 3 to move downward within this distance, the end of the crank arm Ⅰ4-1 fits against the outer wall of the straight tube part 3-1 and the two slide relative to each other, that is, within this distance, the single-phase mechanical switch does not need to drive the crank linkage rod 4 to move (until the crank arm Ⅰ4-1 reaches the position of the end plate part Ⅱ3-3. If the main pull rod 2 continues to move downward at this time, the end plate part Ⅱ3-3 will push the crank arm Ⅰ4-1 to rotate, and then drive the crank arm Ⅱ4-2 to turn and cooperate with the opening buffer 6 to realize the opening buffer operation), thereby reducing the movement mass of the single-phase mechanical switch in the early stage of the opening action and effectively improving the opening speed.

[0043] Similarly, when the circuit breaker switch is in the open state, the end of the curved arm II4-2 cooperates with the opening buffer 6, and is subjected to the reaction force of the impact head of the opening buffer 6, so that the end of the curved arm I4-1 is located at the upper end of the straight tube part 3-1, that is, it is in contact with the lower surface of the end plate part II3-3 at the upper end of the straight tube part 3-1. When the main pull rod 2 is operated to move upward for closing operation, since there is a certain distance between the end of the crank arm Ⅰ4-1 and the end plate part Ⅰ3-2 at the lower end of the straight tube part 3-1, when the main pull rod 2 drives the linkage sleeve 3 to move upward within this distance, the end of the crank arm Ⅰ4-1 is in contact with the outer wall of the support arm and the two slide relative to each other, that is, within this distance, the single-phase mechanical switch does not need to drive the crank linkage rod 4 to move (until the crank arm Ⅰ4-1 reaches the position of the end plate part Ⅰ3-2. If the main pull rod 2 continues to move upward at this time, the end plate part Ⅰ3-2 will push the crank arm Ⅰ4-1 to rotate, and then drive the crank arm Ⅱ4-2 to turn and cooperate with the closing buffer 5 to realize the opening buffer operation), thereby reducing the movement mass of the single-phase mechanical switch in the early stage of closing action and effectively improving the closing speed.

[0044] When the main pull rod 2 moves up and down to perform opening and closing actions, in order to be able to buffer the corresponding actions, the crank linkage rod 4 includes a linkage rod body 4-3 arranged vertically with the main pull rod 2, and the crank arm I 4-1 and the crank arm II 4-2 are both installed on the linkage rod body 4-3 and can rotate with the linkage rod body 4-3.

[0045] When the main pull rod 2 moves up and down, the two end plates of the linkage sleeve 3 can drive the crank arm I 4-1 to rotate, and then drive the linkage rod body 4-3 and the crank arm II 4-2 to rotate in turn. The crank arm II 4-2 can cooperate with the opening buffer 6 or the closing buffer 5 to achieve the effect of opening buffer or closing buffer.

[0046] In order to ensure the stability of the cooperation between the crank arm Ⅰ4-1 and the linkage sleeve 3, a pair of crank arms Ⅰ4-1 are provided, and are respectively arranged on both sides of the straight tube portion 3-1.

[0047] In this embodiment, two crank arms Ⅰ4-1 are integrally arranged on an assembly sleeve 4-4, and the assembly sleeve 4-4 is sleeved on the linkage rod body 4-3 and connected to the linkage rod body 4-3 through a key 4-5, so that the linkage rod body 4-3 can be driven to rotate when the crank arm Ⅰ4-1 rotates.

[0048] In order to further ensure the stability of the sliding fit between the curved arm Ⅰ4-1 and the straight tube part 3-1, a flat cut surface 3-4 is provided on the outer wall of the straight tube part 3-1 at the fitting position with the curved arm Ⅰ4-1.

[0049] Preferably, the outer edge of the end plate portion II3-3 at the lower end of the straight tube portion 3-1 is provided with a lug 3-5, and the position of the lug 3-5 corresponds to the curved arm I4-1 to achieve the limitation of the difference I4-1.

[0050] During the opening and closing process, the crank arm II 4-2 cooperates with the opening buffer 6 and the closing buffer 5 to achieve the opening buffer or closing buffer effect, wherein at least one crank arm II 4-2 is provided and is located at any end of the linkage rod body 4-3.

[0051] In this embodiment, two crank arms II 4-2 are provided and are respectively located at one end of the linkage rod body 4-3. One crank arm II 4-2 cooperates with the corresponding closing buffer 5 and opening buffer 6, and the other crank arm II 4-2 is in a free state.

[0052] Preferably, in order to drive the crank arm II 4-2 to rotate synchronously through the linkage rod body 4-3, the crank arm II 4-2 is sleeved on the end of the linkage rod body 4-3 and the two are matched through the tooth surface.

[0053] Preferably, in order to prevent the crank arm II 4-2 from falling off from the end of the linkage rod body 4-3, fixed end plates 4-6 are respectively provided at both ends of the linkage rod body 4-3.

[0054] The present invention realizes the coordination between the single-phase mechanical switch and the buffer through the crank linkage rod 4, and the length of the crank arm II 4-2 can be selected or adjusted as needed. When the stroke of the single-phase mechanical switch is short, the length of the crank arm II 4-2 can be lengthened. After the length of the crank arm II 4-2 is lengthened, the stroke of the crank arm II 4-2 will become longer when the angle of rotation is the same, so that the opening and closing buffer stroke can be enlarged when the stroke of the single-phase mechanical switch remains unchanged, avoiding the problem of difficulty in selecting and easy damage of the buffer due to the short buffer stroke and high buffer energy.

[0055] In order to ensure the coordination between the crank arm II 4 - 2 and the two buffers, the impacted heads of the closing buffer 5 and the opening buffer 6 are arranged opposite to each other, and the end of the crank arm II 4 - 2 is located between the closing buffer 5 and the opening buffer 6 .

[0056] When switching to the closing state, the end of the crank arm II 4-2 rotates toward the direction of the closing buffer 5, thereby cooperating with the impacted head of the closing buffer 5 to achieve closing buffering; when switching to the opening state, the end of the crank arm II 4-2 rotates toward the direction of the opening buffer 6, thereby cooperating with the impacted head of the opening buffer 6 to achieve opening buffering.

[0057] In order to provide power for the movement of the main pull rod 2, the driving mechanism also includes a repulsion disk 7 connected to the lower end of the main pull rod 2, and an opening coil 8 cooperating with the repulsion disk 7 is arranged above the repulsion disk 7, and a closing coil 9 cooperating with the repulsion disk 7 is arranged below the repulsion disk 7.

[0058] When performing a closing operation, the closing coil 9 is energized, and the repulsive force generated by the closing coil 9 pushes the repulsive disk 7 upward, thereby driving the main pull rod 2 and the moving contact to move upward, thereby realizing the closing operation.

[0059] When the opening operation is performed, the opening coil 8 is energized, and the repulsive force generated by it pushes the repulsive disk 7 downward, thereby driving the main pull rod 2 and the moving contact to move downward, thereby realizing the opening operation.

[0060] In order to facilitate the adjustment of the distance between the repulsion disk 7 and the closing coil 9 and the opening coil 8, a repulsion disk mounting sleeve 10 located below the linkage sleeve 3 is sleeved on the main pull rod 2, the repulsion disk 7 is mounted on the lower end of the repulsion disk mounting sleeve 10, an upper adjusting nut 11 installed on the main pull rod 2 is arranged above the linkage sleeve 3, and a lower adjusting nut 12 installed on the main pull rod 2 is arranged below the repulsion disk 7.

[0061] The lower end of the repulsion plate mounting sleeve 10 is provided with a flange surface, and the repulsion plate 7 is fixed to the lower side of the flange surface by screws. The outer surface of the main pull rod 2 is provided with an external thread, and the upper adjustment nut 11 and the lower adjustment nut 12 are respectively installed at the external thread.

[0062] When the distance between the repulsion disk 7 and the closing coil 9 needs to be reduced, first loosen the lower adjusting nut 12 and turn it downward, then turn the upper adjusting nut 11 downward to push the linkage sleeve 3, the repulsion disk mounting sleeve 10 and the repulsion disk 7 downward.

[0063] Similarly, if the distance between the repulsion disk 7 and the opening coil 8 needs to be reduced, first loosen the upper adjusting nut 11 and turn it upward, then turn the lower adjusting nut 12 upward to push the repulsion disk 7, the repulsion disk mounting sleeve 10 and the linkage sleeve 3 upward.

[0064] In order to facilitate the installation and fixation of the crank linkage 4, the driving mechanism also includes an upper mounting plate 13, and two fixed vertical plates 14 arranged opposite to each other are installed between the upper mounting plate 13 and the bottom plate of the arc extinguishing chamber 1. The crank linkage 4 is rotatably installed on the two fixed vertical plates 14, and the crank arm I4-1 is located between the two fixed vertical plates 14, and the crank arm II4-2 is located on the outside of the fixed vertical plates 14.

[0065] The linkage rod body 4-3 is rotatably mounted on two fixed vertical plates 14 through a shaft sleeve to ensure that the crank arm Ⅰ4-1 drives the crank arm Ⅱ4-2 to rotate.

[0066] In order to facilitate the installation of the closing buffer 5 and the opening buffer 6, a supporting vertical plate 15 is further provided between the upper mounting plate 13 and the bottom plate of the arc extinguishing chamber 1, and the closing buffer 5 and the opening buffer 6 are respectively installed on two oppositely arranged supporting vertical plates 15.

[0067] In this embodiment, three supporting upright plates 15 are provided and distributed in a triangular shape, which can effectively ensure the stability between the arc extinguishing chamber 1 and the upper mounting plate 13 .

[0068] Preferably, the fixed vertical plate 14 and the supporting vertical plate 15 are respectively U-shaped structures, and the bent parts at the upper and lower ends thereof can be conveniently connected to the bottom plate of the arc extinguishing chamber 1 and the upper mounting plate 13 by screws.

[0069] In order to facilitate the installation of the opening coil 8 and the closing coil 9, the driving mechanism also includes a lower mounting plate 16 located below the upper mounting plate 13, the repulsion plate 7 is located between the upper mounting plate 13 and the lower mounting plate 16, the opening coil 8 is installed on the lower side of the upper mounting plate 13, and the closing coil 9 is installed on the upper side of the lower mounting plate 16.

[0070] Among them, the repulsion plate mounting sleeve 10 passes through the upper mounting plate 13, and the two are matched through the shaft sleeve to ensure that the repulsion plate 7 mounting shaft sleeve can move axially on the upper mounting plate 13, and the repulsion plate 7 is located between the upper mounting plate 13 and the lower mounting plate 16.

[0071] The lower side of the upper mounting plate 13 is provided with an opening coil seat 17 connected thereto by screws and with an opening facing downward, and the opening coil 8 is fixed in the opening coil seat 17. The upper side of the lower mounting plate 16 is provided with a closing coil seat 18 connected thereto by screws and with an opening facing upward, and the closing coil 9 is fixed in the closing coil seat 18.

[0072] Preferably, the side of the upper mounting plate 13 is provided with an upper notch 19 that matches the terminal of the opening coil 8, and the side of the lower mounting plate 16 is provided with a lower notch 20 that matches the terminal of the closing coil 9, which can facilitate the connection of the power supply to realize the energization of the coil.

[0073] In order to ensure the stability of the closed state and the open state, an opening and closing holding assembly 21 located on the periphery of the repulsion disk 7 and connected thereto is provided between the upper mounting plate 13 and the lower mounting plate 16 .

[0074] The opening and closing holding assembly 21 may be selected from but not limited to a piston mechanism.

[0075] In this embodiment, the piston mechanism includes a piston cylinder with an opening facing inward, a slider and a spring arranged in the piston cylinder, and the spring is located outside the slider, and the outer side of the repulsion disk 7 is connected to the slider through a hinge rod. The piston cylinder is fixed between the upper mounting plate 13 and the lower mounting plate 16 by screws.

[0076] In the closed state, the spring provides thrust for the slider and provides an upward force for the repulsion disk 7 through the hinged rod. The repulsion disk 7 finally acts on the moving contact through the main pull rod 2 to ensure the stability of the closed state.

[0077] In the open state, the spring provides thrust for the slider and provides a downward force for the repulsion disk 7 through the hinged rod, thereby ensuring the stability of the open state.

[0078] The circuit breaker switch structure of the present invention has a simple overall structure. It can not only reduce the movement mass of the single-phase mechanical switch during the early opening and closing actions, thereby improving the opening and closing speed of the entire circuit breaker switch and achieving the purpose of quickly switching on and off the current, but also solve the problem of difficult selection and easy damage of the buffer parts caused by the short stroke and high buffering energy of the single-phase mechanical switch, and facilitate the buffering of opening and closing.

[0079] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A fast circuit breaker switch structure, characterized in that: It comprises an arc extinguishing chamber (1), and a driving mechanism arranged at the bottom of the arc extinguishing chamber (1) and connected to a moving contact in the arc extinguishing chamber (1); The driving mechanism comprises A main pull rod (2) is arranged vertically, and the top of the main pull rod (2) is connected to the moving contact; A linkage sleeve (3) is sleeved on the main pull rod (2) and can move up and down synchronously with the main pull rod (2); the linkage sleeve (3) is an I-shaped structure, comprising a straight tube portion (3-1) and end plate portions located at both ends of the straight tube portion (3-1); A crank linkage rod (4) is arranged vertically with respect to the main pull rod (2); a crank arm I (4-1) of the crank linkage rod (4) is attached to the outside of the straight tube portion (3-1) and is slidably matched with the outer wall of the straight tube portion (3-1); and a crank arm II (4-2) of the crank linkage rod (4) is respectively matched with a closing buffer (5) and an opening buffer (6); In the closed state, the end of the crank arm I (4-1) is located at the lower end of the straight tube part (3-1); in the open state, the end of the crank arm I (4-1) is located at the upper end of the straight tube part (3-1).

2. The fast circuit breaker switch structure according to claim 1, characterized in that: The crank linkage rod (4) comprises a linkage rod body (4-3) arranged vertically with the main pull rod (2); the crank arm I (4-1) and the crank arm II (4-2) are both mounted on the linkage rod body (4-3) and can rotate along with the linkage rod body (4-3).

3. The fast circuit breaker switch structure according to claim 2, characterized in that: The crank arm I (4-1) is provided in pair and is respectively provided on both sides of the straight tube portion (3-1); A plane section (3-4) is provided on the outer wall of the straight tube portion (3-1) at a position where the straight tube portion (3-1) cooperates with the curved arm I (4-1).

4. The fast circuit breaker switch structure according to claim 2, characterized in that: At least one crank arm II (4-2) is provided and is located at any end of the linkage rod body (4-3).

5. The fast circuit breaker switch structure according to claim 1, characterized in that: The impacted heads of the closing buffer component (5) and the opening buffer component (6) are arranged opposite to each other, and the end of the crank arm II (4-2) is located between the closing buffer component (5) and the opening buffer component (6).

6. The fast circuit breaker switch structure according to claim 1, characterized in that: The driving mechanism also includes a repulsion disk (7) connected to the lower end of the main pull rod (2), and an opening coil (8) cooperating with the repulsion disk (7) is arranged above the repulsion disk (7), and a closing coil (9) cooperating with the repulsion disk (7) is arranged below the repulsion disk (7).

7. The fast circuit breaker switch structure according to claim 6, characterized in that: The main pull rod (2) is sleeved with a repulsion disk mounting sleeve (10) located below the linkage sleeve (3); the repulsion disk (7) is mounted on the lower end of the repulsion disk mounting sleeve (10); an upper adjustment nut (11) mounted on the main pull rod (2) is arranged above the linkage sleeve (3); and a lower adjustment nut (12) mounted on the main pull rod (2) is arranged below the repulsion disk (7).

8. The fast circuit breaker switch structure according to claim 6, characterized in that: The driving mechanism further comprises an upper mounting plate (13), two fixed vertical plates (14) arranged opposite to each other are mounted between the upper mounting plate (13) and the bottom plate of the arc extinguishing chamber (1), the crank linkage rod (4) is rotatably mounted on the two fixed vertical plates (14), the crank arm I (4-1) is located between the two fixed vertical plates (14), and the crank arm II (4-2) is located outside the fixed vertical plates (14).

9. The fast circuit breaker switch structure according to claim 8, characterized in that: A supporting vertical plate (15) is also provided between the upper mounting plate (13) and the bottom plate of the arc extinguishing chamber (1), and the closing buffer component (5) and the opening buffer component (6) are respectively mounted on two of the supporting vertical plates (15) arranged opposite to each other.

10. The fast circuit breaker switch structure according to claim 8, characterized in that: The driving mechanism further comprises a lower mounting plate (16) located below the upper mounting plate (13); the repulsion plate (7) is located between the upper mounting plate (13) and the lower mounting plate (16); the opening coil (8) is mounted on the lower side of the upper mounting plate (13); and the closing coil (9) is mounted on the upper side of the lower mounting plate (16); A switch opening and closing holding assembly (21) is provided between the upper mounting plate (13) and the lower mounting plate (16) and is located at the periphery of the repulsion disk (7) and connected thereto.

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