Primary and secondary fusion complete column-mounted circuit breaker and operating mechanism thereof

Abstract

The utility model discloses a primary and secondary fusion complete column-mounted circuit breaker and an operating mechanism thereof, and relates to the technical field of power grid equipment, the operating mechanism comprises a mounting driving rod and an electromagnetic driver, and a connecting column is configured on a base shell; the driving device comprises a base shell, a driving rod, a connecting rod and locking assemblies, the locking assemblies comprise the first locking assembly and the second locking assembly, the second locking assembly comprises a permanent magnet, and the first locking assembly comprises a ball groove formed in the driving rod and a steel ball supported on the base shell through a supporting spring. The stroke of the linear reciprocating motion of the driving rod meets the following conditions: the driving connecting rod moves to be parallel to the connecting column, and the driving rod is adsorbed on the base shell through the permanent magnet; in the parallel state, the steel ball is embedded into the ball groove, the supporting spring generates compression elastic deformation, the second locking assembly is separated from the base shell, and the pole-mounted circuit breaker comprises an operating mechanism. According to the scheme, the requirement of the pole-mounted circuit breaker on the performance of the electromagnetic driver during opening can be effectively reduced, and the response speed of the opening action is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power grid equipment, in particular to a primary-secondary integrated column mounted circuit breaker and an operating mechanism thereof. Background Art

[0002] As an intelligent device, the integrated primary and secondary pole-mounted circuit breaker has the characteristics of integrated primary and secondary circuit equipment and functions. It is mainly used to realize the segmentation, control and protection of power lines, and plays an important role in the comprehensive monitoring and management of power systems. The main structure of the integrated primary and secondary pole-mounted circuit breaker includes a pole and a base. Several poles (usually three) are fixed on the base. The pole is equipped with a vacuum arc chamber. The vacuum arc chamber is equipped with a moving contact and a static contact. The base is provided with an operating mechanism for realizing the opening and closing excitation. When the pole-mounted circuit breaker is opened under the action of the operating mechanism, the arc generated can be quickly extinguished due to the higher vacuum degree in the vacuum arc chamber and the magnetic field in the contact gap, so as to achieve the purpose of breaking. With the development of smart grid technology, intelligent primary and secondary integrated pole-mounted circuit breakers usually also include voltage transformers and current transformers, which are used to collect voltage signals and current signals on the line respectively. They also usually include transformer coils, capacitors, etc. (usually installed in feeder terminal units (FTU)) to draw power from the line as the power supply for the operating mechanism, related control modules and signal acquisition modules.

[0003] In order to realize the opening or closing operation, the traditional pole-mounted circuit breaker adopts spring energy storage, specifically, the spring on the spring operating mechanism is stretched manually or electrically. In the prior art, there has emerged a technical solution based on an operating mechanism including an electromagnetic driver to trigger the opening and closing actions. For example, the applicant previously proposed a technical solution recorded in the patent document with patent application number CN202520016675.9. In this technical solution, an electromagnetic driver including an electromagnetic coil and a moving iron core is used to control the movement of the driving rod, and the contact state is maintained under the action of the locking assembly. It has the characteristics of reducing the power consumption of the pole-mounted circuit breaker, adapting to the power supply of the energy transformer, and being suitable for use in smart grids.

[0004] The key performance parameters of the integrated primary and secondary pole-mounted circuit breaker include the opening and closing time, which is used to quickly cut off the circuit in the event of a fault, protect equipment and the safety of life and property, and reduce the contact erosion rate of the moving and static contacts. It is necessary to further optimize the relevant means for the opening time performance. Utility Model Content

[0005] In response to the above-mentioned problem of optimizing the opening time performance of the pole-mounted circuit breaker, the utility model provides a primary-secondary integrated pole-mounted circuit breaker and an operating mechanism thereof. This solution can effectively reduce the requirements of the pole-mounted circuit breaker on the performance of the electromagnetic driver when opening and improve the response speed of the opening action.

[0006] In view of the above problems, the utility model provides a primary and secondary integrated set of pole-mounted circuit breaker and its operating mechanism to solve the problems through the following technical points: the primary and secondary integrated set of pole-mounted circuit breaker operating mechanism includes a driving rod installed in a base shell, an electromagnetic driver for driving the driving rod to reciprocate linearly, the base shell is provided with a connecting column through a socket, and the connecting column is perpendicular to the driving rod; it also includes a connecting rod hingedly connected to the connecting column and the driving rod at both ends, and also includes a locking assembly for maintaining the position of the driving rod, the locking assembly includes a first locking assembly and a second locking assembly, the second locking assembly includes a permanent magnet for adsorbing the driving rod on the base shell, the first locking assembly includes a ball groove arranged on the driving rod, and a steel ball supported on the base shell by a supporting spring;

[0007] The linear reciprocating motion of the driving rod satisfies: the driving connecting rod moves to be parallel to the connecting column, and the driving rod is adsorbed on the base shell by the permanent magnet;

[0008] In the parallel state, the steel ball is embedded in the ball groove, the support spring is compressed and elastically deformed, and the second locking component is separated from the base shell.

[0009] When the present solution is in use, the electromagnetic driver applies a force to the driving rod, forcing the driving rod to reciprocate along its own axis. Specifically, the driving rod can be supported by a support and horizontally arranged in the base shell. During this process, the hinge point on the driving rod used for hinged connection with the connecting rod moves synchronously with the driving rod and pushes and pulls the connecting rod. The side of the connecting column rises or falls under the constraint of the side wall of the socket and the push and pull of the connection. After rising, the third conductive column with a moving contact on the top is lifted by the insulating column, so that the moving contact at the upper end of the third conductive column contacts the static contact at the lower end of the first conductive column to achieve line conduction. After falling, the third conductive column is pulled down by the insulating column to make The moving contact at the upper end of the third conductive column is separated from the static contact at the lower end of the first conductive column to realize line disconnection. The locking assembly is used to maintain the position of the driving rod after the electromagnetic driver is powered off. It is easy to understand that when the connecting rod moves and swings with the movement of the driving rod, when the connecting rod is parallel to the connecting column, the connecting column rises to the highest position. At this time, the contact in the pole of the column-mounted circuit breaker is in a closed state. When the connecting rod moves and swings with the movement of the driving rod, as the angle between the connecting rod and the driving rod becomes smaller, the height of the connecting column gradually decreases, so that the insulating column has a downward pulling effect on the third conductive column, and finally realizes the disconnection of the contacts of the column-mounted circuit breaker.

[0010] The present solution is different from the prior art in that the locking assembly includes a first locking assembly and a second locking assembly, and is configured as follows: when the connecting rod is parallel to the connecting column, the connecting column is in the highest position, and the moving contact is lifted to the highest position to fit with the static contact surface. At this time, the second locking assembly is disengaged from the base shell, the steel ball is embedded in the ball groove, and the support spring produces compressive elastic deformation. The rod structure formed by the connecting rod, the insulating column, the third conductive column, and the connecting column is perpendicular to the driving rod. When a compressed spring is connected in series on the insulating column, the pole-mounted circuit breaker forms a stable closed state structure. When opening is required, the electromagnetic driver pulls the driving rod to move in the direction in which the permanent magnet adsorbs the driving rod on the base shell. During this process, the steel ball is released from the ball groove. After the adsorption is completed, the electromagnetic driver is powered off, so that the pole-mounted circuit breaker forms a stable open state structure.

[0011] Compared with the prior art, when the present solution is applied to a pole-mounted circuit breaker, during the opening process, the force exerted by the electromagnetic driver on the driving rod only needs to break the dead point (dead force) connecting rod structure formed by the connecting rod, the connecting column, the insulating column, the third conductive column and the driving rod (the rod structure formed by the connecting rod, the connecting column, the insulating column and the third conductive column is perpendicular to the driving rod). Compared with the use of a locking assembly that is the same as the second locking assembly to realize the position constraint of the driving rod in the closed state, the driving force required to provide the driving rod for the opening action under the above structural form is smaller. Therefore, the present structural design is beneficial to reducing the power design of the electromagnetic driver and reducing the power consumption of the electromagnetic driver. Under the same electromagnetic driver power, the third conductive column can be quickly separated from the first conductive column under the rapid response of the driving rod. Therefore, the present solution is beneficial to increasing the time required for opening the pole-mounted circuit breaker and increasing the response speed of the opening action.

[0012] As a further technical solution for the primary and secondary integrated pole-mounted circuit breaker operating mechanism:

[0013] The first locking assembly and the second locking assembly are respectively arranged at different ends of the driving rod, and also include a limiting mechanism for limiting the travel range of the driving rod. The limiting mechanism is located at one end of the driving rod where the first locking assembly is arranged. When the driving rod moves to a position where the connecting rod is parallel to the connecting column, the end of the driving rod contacts the limiting mechanism.

[0014] In the above scheme, during the closing action of the moving and static contacts under the action of the driving rod, the limiting mechanism is used to limit the stop position of the driving rod movement, so as to achieve: when the limiting mechanism plays the limiting role of the driving rod, the driving rod moves to the position where the connecting rod is parallel to the connecting column. However, in specific applications, it is necessary to appropriately extend the power-on time of the electromagnetic driver to avoid the driving rod from moving backward due to the rebound effect after the driving rod collides with the limiting mechanism. A better scheme is to set a buffer mechanism between the limiting mechanism and the end of the driving rod (such as the buffer mechanism is a plastic structure with a metal pad on the surface, and the metal pad is used as the part of the buffer mechanism for colliding with the driving rod, so as to control the position accuracy of the driving rod during the collision, to ensure the matching accuracy of the ball groove and the steel ball, and the coaxiality of the connecting rod and the connecting column, while reducing the rebound force generated on the driving rod), so as to reduce the rebound force on the driving rod after the driving rod collides with the limiting mechanism.

[0015] The limiting mechanism comprises a limiting bolt threadedly connected to the base shell;

[0016] One end of the limit bolt is located inside the base shell and directly faces the end of the driving rod. When the driving rod moves to a position where the connecting rod is parallel to the connecting column, the end of the driving rod contacts the end of the limit bolt.

[0017] The other end of the limiting bolt is located outside the base shell, and also includes a locking nut which is threadedly connected to the limiting bolt and located outside the base shell.

[0018] The above provides a specific implementation form of a limit mechanism, which is intended to address the following problem: for mass-produced operating mechanisms, due to manufacturing errors and assembly errors, when the connecting rod is parallel to the connecting column, there may be a problem of differences in the stop position of the driving rod. To address this problem, for the operating mechanism, during factory commissioning or installation and commissioning of the column-mounted circuit breaker, first loosen the locking nut, and then rotate the limit bolt to adjust the position of its end on the axis of the driving rod. After adjusting to the appropriate position, tighten the locking nut to fix the limit bolt, so that the final stop position of the driving rod can be adjusted. As a technician in this field, the steel ball can be embedded in the ball groove within a certain range of the driving rod. Therefore, under the condition of ensuring a certain processing accuracy and assembly accuracy, it is not necessary to carry out targeted design of the first locking component related to this problem.

[0019] The first locking assembly includes an assembly seat fixed on the base shell, and the assembly seat is a cylindrical structure;

[0020] It also includes a plug, which is threadedly connected to the component seat, the outer end of the support spring is supported on the plug, and the steel ball is supported on the inner end of the support spring.

[0021] The above scheme provides a specific implementation form of the first locking component, which aims to achieve: since the position of the plug threaded in the component seat is adjustable, when debugging the column-mounted circuit breaker using the operating mechanism, the technical personnel can adjust the position of the plug in the component seat to change the support force of the support spring on the steel ball after the steel ball is embedded in the ball groove, thereby adjusting the steel ball's ability to restrain the movement of the drive rod. After the performance of the support spring, such as the following spring, changes due to use, the position of the plug in the component seat is adjusted to maintain the steel ball's ability to restrain the drive rod, and in the process of the steel ball coming out of the ball groove (the electromagnetic driver pulls the drive rod, and the contact force between the ball groove and the steel ball forces the support spring to be further compressed), there will be no excessive resistance from the steel ball on the drive rod. It can be specifically used that the component seat extends along the radial direction of the drive rod, and the support spring adopts a spiral spring.

[0022] It also includes a bracket that is slidably fitted in the component seat and supported on the inner end of the support spring. The steel ball is rotatably mounted on the inner end of the bracket via a rotating shaft that passes through the center of the ball, and the axis of the rotating shaft is perpendicular to the axis of the drive rod.

[0023] The above provides a specific steel ball constraint method, which aims to achieve: when the driving rod moves along its own axis, the steel ball can rotate around the rotating shaft. In this way, during the relative movement of the steel ball with respect to the driving rod in the direction of the driving rod axis, the resistance brought by the steel ball to the movement of the driving rod can be reduced, which is beneficial to ensuring the response speed of the closing action and reducing the power consumption of the electromagnetic drive.

[0024] The inner end of the component seat is provided with a sealing plate, the inner end of the bracket passes through the sealing plate through the through hole on the sealing plate, and the outer end of the bracket is restricted in the component seat by the sealing plate.

[0025] The above provides a technical solution for constraining the bracket in the component seat by using a sealing plate, specifically: even if the bracket is pushed to the innermost end of the component seat under the action of the support spring, the first locking assembly will still be constrained into an integral structure under the action of the sealing plate, thereby facilitating the assembly of the first locking assembly (when there is no sealing plate and the driving rod cannot support the steel ball, the bracket and the steel ball may fall out of the component seat under the action of the support spring).

[0026] The outer end of the component seat is an open end, and the outer end of the plug is provided with a fitting portion for connecting the plug with a rotating tool, and the rotating tool is used to drive the plug to rotate to change its threaded engagement position on the component seat.

[0027] The above provides a technical solution for conveniently adjusting the position of the plug in the component seat, specifically: insert a rotating tool into the component seat through the open end, the head end of the rotating tool is connected to the plug through the fitting part, and the position of the plug in the component seat is changed by rotating the plug. Preferably, in the closed state, due to the existence of the dead point connecting rod structure, the support spring is not required to provide a large thrust for the steel ball. In order to avoid the loosening of the plug due to insufficient support of the support spring on the plug, a locking column can be provided in the component seat to overlap with the plug and be located at the outer end of the plug. The locking column is connected to the internal thread on the inner hole of the component seat through the connecting thread on its outer side, and the locking column is installed so that the inner end and the outer end of the plug are squeezed against each other. In use, the position of the plug is adjusted first, and then the locking column is installed; when the position of the plug needs to be adjusted, after the locking column is disassembled, the position of the plug is re-determined by the rotating tool, and then the locking column is connected. At the same time, the position of the plug can be determined according to the position stability experiment of the driving rod.

[0028] The number of the connecting columns is three and they are arranged at intervals along the axis direction of the driving rod;

[0029] Each connecting column is equipped with a connecting rod for realizing transmission connection with the driving rod;

[0030] The second locking assembly includes a first permanent magnet fixed on the driving rod and a second permanent magnet fixed on the base shell, and also includes an elastic pad arranged between the first permanent magnet and the second permanent magnet. The driving rod is adsorbed on the base shell as follows: the first permanent magnet is attracted to the second permanent magnet, and the elastic pad generates elastic compression deformation under the clamping of the first permanent magnet and the second permanent magnet.

[0031] In the above scheme, the three connecting columns are used to adapt to the use mode of the existing pole-mounted circuit breaker which generally has three poles, that is: each pole is equipped with a connecting column, and each connecting column is equipped with a connecting rod. These connecting columns move synchronously under the action of the same driving rod to realize the synchronous opening and closing of each phase of the line.

[0032] The above also provides a specific implementation form of the second locking assembly. The mutual attraction between the first permanent magnet and the second permanent magnet can effectively ensure the position stability of the moving contact in the open state, which is beneficial to ensuring the safety of the line. The elastic pad is used to reduce the impact between the first permanent magnet and the second permanent magnet during the approach process. It is easy to understand that the magnetic force between the first permanent magnet and the second permanent magnet changes according to the distance between the two. When the two are at the farthest position, the magnetic force between the two is small. At this time, the first locking mechanism is used to ensure the reliability of the position of the driving rod. When the distance between the two is close (no direct contact is required), the larger magnetic force can effectively ensure the safety of the use of this operating mechanism.

[0033] The present solution also relates to a primary-secondary integrated pole-mounted circuit breaker, comprising a pole housing, a conductive column arranged in the pole housing, the conductive column comprising a first conductive column carrying a static contact, a third conductive column carrying a moving contact, and a second conductive column electrically connected to the third conductive column through a flexible cable, the lower end of the third conductive column is connected to an insulating column, the insulating column comprises a first insulating column connected to the lower end of the third conductive column, and a second insulating column connected to the lower end of the first insulating column through a spring, and also comprises an operating mechanism connected to the second insulating column, the operating mechanism is the operating mechanism as described in any one of the above;

[0034] The lower end of the pole shell is fixedly connected to the base shell;

[0035] The upper end of the connecting column is fixedly connected to the lower end of the second insulating column.

[0036] The above scheme is a pole-mounted circuit breaker including the operating mechanism.

[0037] As a further technical solution for the primary and secondary integrated pole-mounted circuit breaker:

[0038] It also includes a vacuum tube arranged in the pole housing, wherein the moving contact and the static contact are both located in the vacuum tube;

[0039] The vacuum tube includes an integrated alumina ceramic housing;

[0040] The moving contact and the stationary contact are both provided with electrodes made of copper-chromium alloy;

[0041] It also includes a bellows for connecting the vacuum tube with the third conductive column, and the bellows is a metal tube.

[0042] The above provides a specific implementation form of a pole-mounted circuit breaker, which is used to ensure the voltage resistance of the vacuum tube: the integrated alumina ceramic shell has excellent insulation performance and mechanical strength, and is combined with a bellows as a metal tube. The electrode is used to reduce the metal vapor that may be generated during the use of the pole-mounted circuit breaker. The relevant structure can effectively ensure the vacuum degree inside the vacuum tube during use, which is beneficial to ensuring the voltage resistance level of the vacuum interrupter of the pole-mounted circuit breaker.

[0043] The utility model has the following beneficial effects:

[0044] When this solution is applied to a pole-mounted circuit breaker, during the opening process, the force exerted by the electromagnetic driver on the driving rod only needs to break the dead point (dead force) connecting rod structure formed by the connecting rod, the connecting column, the insulating column, the third conductive column and the driving rod (the columnar structure formed by the connecting rod, the connecting column, the insulating column and the third conductive column is perpendicular to the driving rod). Compared with using the same locking component as the second locking component to realize the position constraint of the driving rod in the closed state, the driving force required to be provided to the driving rod under the above structural form is smaller. Therefore, this structural design is beneficial to reducing the power design of the electromagnetic driver and reducing the power consumption of the electromagnetic driver. Under the same electromagnetic driver power, the third conductive column can be quickly separated from the first conductive column under the rapid response of the driving rod. Therefore, this solution is beneficial to increasing the time required for opening the pole-mounted circuit breaker and increasing the response speed of the opening action. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a specific pole embodiment in the primary and secondary integrated pole-mounted circuit breaker described in this solution, and the schematic diagram is a cross-sectional view;

[0046] Figure 2 It is a structural schematic diagram of a specific base embodiment in the primary and secondary integrated pole-mounted circuit breaker described in this solution, and the schematic diagram is a cross-sectional view;

[0047] Figure 3 for Figure 2 A partial enlarged view of part A in the middle.

[0048] The reference numerals in the accompanying drawings are respectively: 1, pole shell, 2, first conductive column, 3, vacuum tube, 4, bellows, 5, second conductive column, 6, first insulating column, 7, spring, 8, second insulating column, 9, third conductive column, 10, base shell, 11, connecting column, 12, support, 13, ball groove, 14, first locking assembly, 15, connecting rod, 16, electromagnetic drive, 17, second locking assembly, 18, steel ball, 19, bracket, 20, support spring, 21, assembly seat, 22, plug, 23, drive rod, 24, limit bolt. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the embodiments, but the present invention is not limited to the following embodiments:

[0050] Embodiment 1:

[0051] like Figures 1 to 3As shown, the primary and secondary integrated column mounted circuit breaker operating mechanism comprises a driving rod 23 installed in a base housing 10, an electromagnetic driver 16 for driving the driving rod 23 to reciprocate linearly, the base housing 10 is provided with a connecting column 11 through a socket, and the connecting column 11 is perpendicular to the driving rod 23; it also comprises a connecting rod 15 whose two ends are respectively hingedly connected to the connecting column 11 and the driving rod 23, and a locking assembly for realizing the position retention of the driving rod 23, the locking assembly comprises a first locking assembly 14 and a second locking assembly 17, the second locking assembly 17 comprises a permanent magnet for adsorbing the driving rod 23 on the base housing 10, the first locking assembly 14 comprises a ball groove 13 arranged on the driving rod 23, and a steel ball 18 supported on the base housing 10 through a supporting spring 20;

[0052] The linear reciprocating motion of the driving rod 23 satisfies: the driving connecting rod 15 moves to be parallel to the connecting column 11, and the driving rod 23 is adsorbed on the base housing 10 by the permanent magnet;

[0053] In the parallel state, the steel ball 18 is embedded in the ball groove 13 , the support spring 20 is compressed and elastically deformed, and the second locking assembly 17 is separated from the base housing 10 .

[0054] When the present solution is in use, the electromagnetic driver 16 applies a force to the driving rod 23, forcing the driving rod 23 to reciprocate along its own axis. Specifically, the driving rod 23 can be supported by the support 12 and horizontally arranged in the base shell 10. During this process, the hinge point on the driving rod 23 for hinged connection with the connecting rod 15 moves synchronously with the driving rod 23 and pushes and pulls the connecting rod 15. The side of the connecting column 11 is constrained by the side wall of the jack and the push and pull of the connection, and rises or falls. After rising, the third conductive column 9 with a moving contact on the top is lifted by the insulating column, so that the moving contact at the upper end of the third conductive column 9 contacts the static contact at the lower end of the first conductive column 2, so that the line is conductive. After falling, the third conductive column 9 is pulled down by the insulating column to make the third conductive column 9 The moving contact at the upper end of the third conductive column 9 is separated from the static contact at the lower end of the first conductive column 2 to achieve line disconnection. The locking assembly is used to maintain the position of the driving rod 23 after the electromagnetic driver 16 is powered off. It is easy to understand that when the connecting rod 15 moves and swings with the movement of the driving rod 23, when the connecting rod 15 is parallel to the connecting column 11, the connecting column 11 rises to the highest position. At this time, the contact in the pole of the column-mounted circuit breaker is in a closed state. When the connecting rod 15 moves and swings with the movement of the driving rod 23, as the angle between the connecting rod 15 and the driving rod 23 becomes smaller, the height of the connecting column 11 gradually decreases, so that the insulating column has a downward pull on the third conductive column 9, and finally the contact of the column-mounted circuit breaker is disconnected.

[0055] The present solution is different from the prior art in that the locking assembly includes a first locking assembly 14 and a second locking assembly 17, and is configured as follows: when the connecting rod 15 is parallel to the connecting column 11, the connecting column 11 is in the highest position, and the moving contact is lifted to the highest position to fit with the static contact surface. At this time, the second locking assembly 17 is separated from the base shell 10, the steel ball 18 is embedded in the ball groove 13, and the support spring 20 produces compression elastic deformation. The rod structure formed by the connecting rod 15, the insulating column, the third conductive column 9, and the connecting column 11 is perpendicular to the driving rod 23. When a compressed spring 7 is connected in series on the insulating column, the column-mounted circuit breaker forms a stable closed state structure. When opening is required, the electromagnetic driver 16 pulls the driving rod 23 to move in the direction in which the permanent magnet adsorbs the driving rod 23 on the base shell 10. During this process, the steel ball 18 is released from the ball groove 13. After the adsorption is completed, the electromagnetic driver 16 is powered off, so that the column-mounted circuit breaker forms a stable open state structure.

[0056] Compared with the prior art, when the present solution is applied to a pole-mounted circuit breaker, during the opening process, the force exerted by the electromagnetic driver 16 on the driving rod 23 only needs to break the dead point (dead force) connecting rod 15 structure formed by the connecting rod 15, the connecting column 11, the insulating column, the third conductive column 9 and the driving rod 23 (the rod structure formed by the connecting rod 15, the connecting column 11, the insulating column, and the third conductive column 9 is perpendicular to the driving rod 23). Compared with the use of a locking assembly that is the same as the second locking assembly 17 to realize the position constraint of the driving rod 23 in the closed state, the driving force required to provide the driving rod 23 for the opening action under the above structural form is smaller. Therefore, the present structural design is beneficial to reducing the power design of the electromagnetic driver 16 and the power consumption of the electromagnetic driver 16. Under the same electromagnetic driver 16 power, the third conductive column 9 can be quickly separated from the first conductive column 2 under the rapid response of the driving rod 23. Therefore, the present solution is beneficial to increasing the time required for opening the pole-mounted circuit breaker and increasing the response speed of the opening action.

[0057] Embodiment 2:

[0058] This embodiment is further refined on the basis of embodiment 1:

[0059] The first locking assembly 14 and the second locking assembly 17 are respectively arranged at different ends of the driving rod 23, and also include a limiting mechanism for limiting the travel range of the driving rod 23. The limiting mechanism is located at one end of the driving rod 23 where the first locking assembly 14 is arranged. When the driving rod 23 moves to a position where the connecting rod 15 is parallel to the connecting column 11, the end of the driving rod 23 contacts the limiting mechanism.

[0060] In the above scheme, during the closing action of the moving and static contacts under the action of the driving rod 23, the limiting mechanism is used to limit the stop point position of the driving rod 23, so as to achieve: when the limiting mechanism plays the limiting role of the driving rod 23, the driving rod 23 moves to the position where the connecting rod 15 is parallel to the connecting column 11. However, in specific applications, it is necessary to appropriately extend the power-on time of the electromagnetic driver 16 to avoid the driving rod 23 from moving backward due to the rebound effect after the driving rod 23 collides with the limiting mechanism. A better scheme is to set a buffer mechanism between the limiting mechanism and the end of the driving rod 23 (such as the buffer mechanism is a plastic structure with a metal pad on the surface, and the metal pad is used as the part of the buffer mechanism for colliding with the driving rod 23, so as to control the position accuracy of the driving rod 23 during the collision, to ensure the matching accuracy of the ball groove 13 and the steel ball 18, the coaxiality of the connecting rod 15 and the connecting column 11, and reduce the rebound force generated on the driving rod 23), so as to reduce the rebound force on the driving rod 23 after the driving rod 23 collides with the limiting mechanism.

[0061] Embodiment 3:

[0062] This embodiment is further refined on the basis of Embodiment 2:

[0063] The limiting mechanism includes a limiting bolt 24 threadedly connected to the base housing 10;

[0064] One end of the limit bolt 24 is located inside the base housing 10 and faces the end of the driving rod 23. When the driving rod 23 moves to a position where the connecting rod 15 is parallel to the connecting column 11, the end of the driving rod 23 contacts the end of the limit bolt 24.

[0065] The other end of the limiting bolt 24 is located outside the base housing 10 , and further includes a locking nut threadedly connected to the limiting bolt 24 and located outside the base housing 10 .

[0066] The above provides a specific implementation form of a limit mechanism, which is intended to address the following problem: for mass-produced operating mechanisms, due to manufacturing errors and assembly errors, when the connecting rod 15 is parallel to the connecting column 11, there may be a problem that the stop position of the driving rod 23 is different. To address this problem, for the operating mechanism, during factory commissioning or installation and commissioning of the column-mounted circuit breaker, first loosen the locking nut, and then rotate the limit bolt 24 to adjust the position of its end on the axis of the driving rod 23. After adjusting to a suitable position, tighten the locking nut to fix the limit bolt 24, so that the final stop position of the driving rod 23 can be adjusted. As a person skilled in the art, the steel ball 18 can be embedded in the ball groove 13 within a certain range of the travel of the driving rod 23, so under the condition of ensuring a certain processing accuracy and assembly accuracy, it is not necessary to carry out a targeted design of the first locking component 14 related to this problem.

[0067] Embodiment 4:

[0068] This embodiment is further refined on the basis of embodiment 1:

[0069] The first locking assembly 14 includes an assembly seat 21 fixed on the base housing 10, and the assembly seat 21 is a cylindrical structure;

[0070] It also includes a plug 22 which is threadedly connected to the component seat 21 . The outer end of the support spring 20 is supported on the plug 22 , and the steel ball 18 is supported on the inner end of the support spring 20 .

[0071] The above scheme provides a specific implementation form of the first locking component 14, which aims to achieve: since the position of the plug 22 threadedly connected in the component seat 21 is adjustable, when debugging the column-mounted circuit breaker using the operating mechanism, the technical personnel can adjust the position of the plug 22 in the component seat 21 to change the support force of the support spring 20 on the steel ball 18 after the steel ball 18 is embedded in the ball groove 13, thereby adjusting the restraining ability of the steel ball 18 on the movement of the driving rod 23. After the performance of the support spring 20, such as the following spring 7, etc., changes due to use, the restraining ability of the steel ball 18 on the driving rod 23 is maintained by adjusting the position of the plug 22 in the component seat 21, and in the process of the steel ball 18 being pulled out of the ball groove 13 (the electromagnetic driver 16 pulls the driving rod 23, and the contact force between the ball groove 13 and the steel ball 18 forces the support spring 20 to be further compressed), there will be no excessive resistance from the steel ball 18 on the driving rod 23. It can be specifically used that the component seat 21 extends along the radial direction of the driving rod 23, and the support spring 20 adopts a spiral spring.

[0072] Embodiment 5:

[0073] This embodiment is further refined on the basis of Embodiment 4:

[0074] It also includes a bracket 19 that is slidably fitted in the component seat 21 and supported on the inner end of the support spring 20. The steel ball 18 is rotatably mounted on the inner end of the bracket 19 via a rotating shaft that passes through the center of the ball. The axis of the rotating shaft is perpendicular to the axis of the driving rod 23.

[0075] The above provides a specific method of restraining the steel ball 18, which aims to achieve: when the driving rod 23 moves along its own axis, the steel ball 18 can rotate around the rotating shaft. In this way, during the relative movement of the steel ball 18 relative to the driving rod 23 in the axial direction of the driving rod 23, the resistance brought by the steel ball 18 to the movement of the driving rod 23 can be reduced, which is beneficial to ensuring the response speed of the closing action and reducing the power consumption of the electromagnetic driver 16.

[0076] Embodiment 6:

[0077] This embodiment is further refined on the basis of Embodiment 5:

[0078] The inner end of the component seat 21 is provided with a sealing plate, the inner end of the bracket 19 passes through the sealing plate through the through hole on the sealing plate, and the outer end of the bracket 19 is restricted in the component seat 21 by the sealing plate.

[0079] The above provides a technical solution for constraining the bracket 19 in the component seat 21 by using a sealing plate, specifically: even if the bracket 19 is pushed to the innermost end of the component seat 21 under the action of the support spring 20, under the action of the sealing plate, the first locking component 14 will still be constrained to be an integral structure, thereby facilitating the assembly of the first locking component 14 (when there is no sealing plate and the driving rod 23 cannot support the steel ball 18, under the action of the support spring 20, the bracket 19 and the steel ball 18 may fall out of the component seat 21).

[0080] Embodiment 7:

[0081] This embodiment is further refined on the basis of Embodiment 4:

[0082] The outer end of the component seat 21 is an open end, and the outer end of the plug 22 is provided with a fitting portion for connecting the plug 22 with a rotating tool. The rotating tool is used to drive the plug 22 to rotate to change its threaded engagement position on the component seat 21.

[0083] The above provides a technical solution for conveniently adjusting the position of the plug 22 in the component seat 21, specifically: insert a rotating tool into the component seat 21 through the open end, the head end of the rotating tool is connected to the plug 22 through the fitting portion, and the position of the plug 22 in the component seat 21 is changed by rotating the plug 22. Preferably, in the closed state, due to the existence of the dead point connecting rod 15 structure, the support spring 20 is not required to provide a large thrust for the steel ball 18. In order to avoid the loosening of the plug 22 due to insufficient support of the support spring 20 on the plug 22, a locking column can be provided in the component seat 21, which overlaps with the plug 22 and is located at the outer end of the plug 22. The locking column is connected to the internal thread on the inner hole of the component seat 21 through the connecting thread on its outer side, and the locking column is installed so that the inner end and the outer end of the plug 22 are pressed against each other. In use, the position of the plug 22 is adjusted first, and then the locking column is installed; when the position of the plug 22 needs to be adjusted, after removing the locking column, the position of the plug 22 is re-determined using a rotating tool, and then the locking column is connected. At the same time, the position of the plug 22 can be determined based on the position stability experiment of the driving rod 23.

[0084] Embodiment 8:

[0085] This embodiment is further refined on the basis of embodiment 1:

[0086] The number of the connecting columns 11 is three and they are arranged at intervals along the axis direction of the driving rod 23;

[0087] Each connecting column 11 is provided with a connecting rod 15 for realizing transmission connection with the driving rod 23;

[0088] The second locking assembly 17 includes a first permanent magnet fixed on the driving rod 23 and a second permanent magnet fixed on the base shell 10, and also includes an elastic pad arranged between the first permanent magnet and the second permanent magnet. The driving rod 23 is adsorbed on the base shell 10 as follows: the first permanent magnet is attracted to the second permanent magnet, and the elastic pad generates elastic compression deformation under the clamping of the first permanent magnet and the second permanent magnet.

[0089] In the above scheme, the three connecting columns 11 are used to adapt to the use mode of the existing pole-mounted circuit breaker which generally has three poles, that is, each pole is equipped with a connecting column 11, and each connecting column 11 is equipped with a connecting rod 15. These connecting columns 11 move synchronously under the action of the same driving rod 23 to realize the synchronous opening and closing of each phase of the line.

[0090] The above also provides a specific implementation form of the second locking assembly 17. The mutual attraction between the first permanent magnet and the second permanent magnet can effectively ensure the position stability of the moving contact in the open state, which is beneficial to ensuring the safety of the line. The elastic pad is used to reduce the impact between the first permanent magnet and the second permanent magnet during the approach process. It is easy to understand that the magnetic force between the first permanent magnet and the second permanent magnet changes according to the distance between the two. When the two are at the farthest position, the magnetic force between the two is small. At this time, the first locking mechanism is used to ensure the reliability of the position of the driving rod 23. When the distance between the two is close (no direct contact is required), the larger magnetic force can effectively ensure the safety of the use of this operating mechanism.

[0091] Embodiment 9:

[0092] The present embodiment relates to a primary-secondary integrated pole-mounted circuit breaker, comprising a pole housing 1, a conductive column arranged in the pole housing 1, the conductive column comprising a first conductive column 2 carrying a static contact, a third conductive column 9 carrying a moving contact, and a second conductive column 5 electrically connected to the third conductive column 9 through a flexible cable, the lower end of the third conductive column 9 is connected to an insulating column, the insulating column comprises a first insulating column 6 connected to the lower end of the third conductive column 9, and a second insulating column 8 connected to the lower end of the first insulating column 6 through a spring 7, and also comprises an operating mechanism connected to the second insulating column 8, the operating mechanism is the operating mechanism in any of the above embodiments;

[0093] The lower end of the pole housing 1 is fixedly connected to the base housing 10;

[0094] The upper end of the connecting column 11 is fixedly connected to the lower end of the second insulating column 8 .

[0095] The above scheme is a pole-mounted circuit breaker including the operating mechanism.

[0096] Embodiment 10:

[0097] This embodiment is further refined on the basis of Embodiment 9:

[0098] It also includes a vacuum tube 3 arranged in the pole housing 1, and the moving contact and the static contact are both located in the vacuum tube 3;

[0099] The vacuum tube 3 comprises an integrated alumina ceramic housing;

[0100] The moving contact and the stationary contact are both provided with electrodes made of copper-chromium alloy;

[0101] It also includes a bellows 4 for connecting the vacuum tube 3 and the third conductive column 9, and the bellows 4 is a metal tube.

[0102] The above provides a specific implementation form of a pole-mounted circuit breaker, which is used to ensure the pressure resistance of the vacuum tube 3: the integrated alumina ceramic shell has excellent insulation performance and mechanical strength, and is matched with a bellows 4 which is a metal tube. The electrode is used to reduce the metal vapor that may be generated during the use of the pole-mounted circuit breaker. The relevant structure can effectively ensure the vacuum degree inside the vacuum tube 3 during use, which is beneficial to ensuring the pressure resistance level of the vacuum interrupter of the pole-mounted circuit breaker.

[0103] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments derived without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A primary-secondary integrated column mounted circuit breaker operating mechanism, comprising a driving rod (23) installed in a base housing (10), an electromagnetic driver (16) for driving the driving rod (23) to linearly reciprocate, the base housing (10) being provided with a connecting column (11) via a socket, the connecting column (11) being perpendicular to the driving rod (23); a connecting rod (15) having two ends respectively hingedly connected to the connecting column (11) and the driving rod (23), and a locking assembly for achieving position retention of the driving rod (23), characterized in that: The locking assembly comprises a first locking assembly (14) and a second locking assembly (17), the second locking assembly (17) comprising a permanent magnet for adsorbing a driving rod (23) on a base housing (10), and the first locking assembly (14) comprising a ball groove (13) provided on the driving rod (23) and a steel ball (18) supported on the base housing (10) via a supporting spring (20); The linear reciprocating stroke of the driving rod (23) satisfies: the driving connecting rod (15) moves to be parallel to the connecting column (11), and the driving rod (23) is adsorbed on the base shell (10) by the permanent magnet; In the parallel state, the steel ball (18) is embedded in the ball groove (13), the support spring (20) generates compression elastic deformation, and the second locking component (17) is separated from the base shell (10).

2. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to claim 1, characterized in that: The first locking assembly (14) and the second locking assembly (17) are respectively arranged at different ends of the driving rod (23), and also include a limiting mechanism for limiting the travel range of the driving rod (23); the limiting mechanism is located at one end of the driving rod (23) where the first locking assembly (14) is arranged; when the driving rod (23) moves to a position where the connecting rod (15) is parallel to the connecting column (11), the end of the driving rod (23) contacts the limiting mechanism.

3. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to claim 2, characterized in that: The limiting mechanism comprises a limiting bolt (24) threadedly connected to the base housing (10); One end of the limiting bolt (24) is located inside the base housing (10) and directly faces the end of the driving rod (23); when the driving rod (23) moves to a position where the connecting rod (15) is parallel to the connecting column (11), the end of the driving rod (23) contacts the end of the limiting bolt (24); The other end of the limiting bolt (24) is located outside the base shell (10), and also includes a locking nut threadedly connected to the limiting bolt (24) and located outside the base shell (10).

4. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to claim 1, characterized in that: The first locking component (14) comprises a component seat (21) fixed on the base shell (10), and the component seat (21) is a cylindrical structure; It also includes a plug (22), the plug (22) being threadedly connected to the component seat (21), the outer end of the support spring (20) being supported on the plug (22), and the steel ball (18) being supported on the inner end of the support spring (20).

5. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to claim 4, characterized in that: It also includes a bracket (19) that is slidably fitted in the component seat (21) and supported on the inner end of the support spring (20), and the steel ball (18) is rotatably mounted on the inner end of the bracket (19) via a rotating shaft that passes through the center of the ball, and the axis of the rotating shaft is perpendicular to the axis of the driving rod (23).

6. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to claim 5, characterized in that: The inner end of the component seat (21) is provided with a sealing plate, the inner end of the bracket (19) passes through the sealing plate through a through hole on the sealing plate, and the outer end of the bracket (19) is restricted in the component seat (21) by the sealing plate.

7. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to any one of claims 4 to 6, characterized in that: The outer end of the component seat (21) is an open end, and the outer end of the plug (22) is provided with a fitting portion for connecting the plug (22) to a rotating tool, and the rotating tool is used to drive the plug (22) to rotate so as to change its threaded engagement position on the component seat (21).

8. The primary and secondary integrated pole mounted circuit breaker operating mechanism according to any one of claims 1 to 6, characterized in that: The number of the connecting columns (11) is three and they are arranged at intervals along the axial direction of the driving rod (23); Each connecting column (11) is provided with a connecting rod (15) for realizing transmission connection between the connecting column and the driving rod (23); The second locking assembly (17) comprises a first permanent magnet fixed on the driving rod (23) and a second permanent magnet fixed on the base shell (10), and also comprises an elastic pad arranged between the first permanent magnet and the second permanent magnet, wherein the driving rod (23) is adsorbed on the base shell (10) in the following manner: the first permanent magnet is attracted to the second permanent magnet, and the elastic pad generates elastic compression deformation under the clamping of the first permanent magnet and the second permanent magnet.

9. A primary-secondary integrated pole-mounted circuit breaker, comprising a pole housing (1), a conductive column arranged in the pole housing (1), the conductive column comprising a first conductive column (2) carrying a static contact, a third conductive column (9) carrying a moving contact, and a second conductive column (5) electrically connected to the third conductive column (9) via a flexible cable, the lower end of the third conductive column (9) being connected to an insulating column, the insulating column comprising a first insulating column (6) connected to the lower end of the third conductive column (9), and a second insulating column (8) connected to the lower end of the first insulating column (6) via a spring (7), and also comprising an operating mechanism connected to the second insulating column (8), characterized in that: The operating mechanism is the operating mechanism according to any one of claims 1 to 8; The lower end of the pole housing (1) is fixedly connected to the base housing (10); The upper end of the connecting column (11) is fixedly connected to the lower end of the second insulating column (8).

10. The primary and secondary integrated pole mounted circuit breaker according to claim 9, characterized in that: It also includes a vacuum tube (3) arranged in the pole housing (1), wherein the moving contact and the stationary contact are both located in the vacuum tube (3); The vacuum tube (3) comprises an integrated alumina ceramic shell; The moving contact and the stationary contact are both provided with electrodes made of copper-chromium alloy; It also includes a bellows (4) for connecting the vacuum tube (3) and the third conductive column (9), wherein the bellows (4) is a metal tube.

Images