Interlocking device and switch equipment

Abstract

The invention relates to the field of interlocking or locking of switch devices, in particular to an interlocking device and switch equipment. The interlocking device is used for solving the problem that the reliability of the existing interlocking device is reduced because the interlocking rod completes or relieves the interlocking of the circuit breaker when the disconnecting switch is not switched off or switched on. The interlocking device comprises a support frame and a transmission rotating shaft, a cam is rotationally assembled on the transmission rotating shaft, an interlocking rod is matched with the cam, and a groove pin matching structure is arranged on the transmission rotating shaft and the cam, so that the transmission rotating shaft has an idle stroke of rotating relative to the cam when the transmission rotating shaft is in a state from an opening state to a closing state; from a closing state to an opening state, the transmission rotating shaft idles relative to the cam; in the process from closing to complete closing and from opening to complete opening, the transmission rotating shaft and the cam rotate synchronously. Thus, when the disconnecting switch is not switched on or switched off, the interlocking rod cannot complete or release interlocking of the circuit breaker, and the reliability of the interlocking device is improved.

Description

Technical Field

[0001] The invention relates to the field of interlocking or locking of switch devices, and in particular to an interlocking device and a switch equipment. Background Art

[0002] In the power transmission and distribution system, the operating mechanism of the disconnector and circuit breaker in the high-voltage switchgear is often used in combination, and the disconnector and circuit breaker must follow a fixed operation sequence to ensure the safety of the operation process. Because the disconnector in the switch cabinet generally does not have the ability to extinguish arcs, it is only used to disconnect live lines. Its main function is to isolate electrical equipment from live lines; while the circuit breaker has the ability to extinguish arcs and can safely disconnect live lines. Therefore, according to the characteristics of the two, after the power outage for maintenance, the power supply must ensure that the disconnector is closed first and then the circuit breaker is closed, and the arc extinguishing ability of the circuit breaker is used to safely realize the power supply operation. Therefore, it is generally proposed in the switchgear that the circuit breaker cannot be closed when the disconnector is in the open state.

[0003] The Chinese utility model patent with the authorization announcement number CN205943821U discloses a mechanical interlocking device for disconnecting switch and circuit breaker, wherein the disconnecting switch realizes opening and closing by rotating its main shaft, and a sliding angle (i.e., cam) is fixedly connected to the main shaft, and an interlocking rod is arranged in cooperation with the sliding angle, and a reset device is arranged on the interlocking rod, and the interlocking rod reciprocates under the action of the sliding angle and the reset device to realize blocking or avoiding the closing path of the circuit breaker. When the disconnecting switch is opened, the main shaft of the disconnecting switch needs to be rotated counterclockwise, and the sliding angle also rotates counterclockwise at this time, thereby pressing the interlocking rod downward, until the disconnecting switch is opened in place, the interlocking rod blocks the closing pressure plate of the circuit breaker, so that the circuit breaker cannot be closed; when the disconnecting switch is closed, the main shaft of the disconnecting switch needs to be rotated clockwise, and the sliding angle also rotates clockwise at this time, thereby loosening the interlocking rod, and the interlocking rod moves upward under the action of the reset device, until the disconnecting switch is closed in place, the interlocking rod avoids the closing pressure plate of the circuit breaker, and the circuit breaker can be closed. Among them, the main shaft of the disconnector needs to rotate a certain angle to realize the opening and closing of the disconnector, and the main shaft and the sliding angle are fixedly connected, that is, the two rotate synchronously. In this way, when the main shaft of the disconnector is rotated, the cam will rotate synchronously with the main shaft to push or loosen the interlocking rod. The interlocking rod may complete or release the interlocking of the circuit breaker when the main shaft rotates a certain angle and the disconnector has not yet opened or closed, thereby reducing the reliability of the interlocking device. Summary of the invention

[0004] The object of the present invention is to provide an interlocking device to solve the problem that the interlocking device of the prior art has completed or released the interlocking of the circuit breaker under the action of the cam when the disconnector has not been opened or closed, thereby reducing the reliability of the interlocking of the interlocking device. The object of the present invention is also to provide a switchgear to solve the problem that the interlocking device of the prior art has completed or released the interlocking of the circuit breaker under the action of the cam when the disconnector has not been opened or closed, thereby reducing the reliability of the interlocking of the interlocking device.

[0005] In order to solve the above technical problems, an interlocking device of the present invention adopts the following technical solutions:

[0006] The interlocking device comprises a support frame, on which a transmission shaft connected to the operating shaft of the isolation mechanism is arranged, a cam is rotatably mounted on the transmission shaft, and a guide interlocking rod is arranged in cooperation with the cam, the interlocking rod is used to cooperate with the closing shaft of the circuit breaker, and the interlocking rod has a blocking state that can block the closing shaft to prevent it from closing and a evading state that avoids the closing shaft to release the blocking when it reciprocates; a closing slot pin matching structure and an opening slot pin matching structure are arranged on the transmission shaft and the cam, the closing slot pin matching structure comprises a closing arc groove and a closing stop pin, and the opening slot pin matching structure comprises an opening arc groove and an opening stop pin, and a corresponding one of the stop pin and the arc groove One is arranged on the transmission shaft, and the other is arranged on the cam. The circumferential positions of the arc grooves and the corresponding stop pins in the two groove-pin matching structures satisfy: in the process of the transmission shaft rotating from the open state to the just closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft rotating from the fully closed state to the just open state is the idling stroke of the transmission shaft relative to the cam, and in the process of rotating from the just opened state to the fully open state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker.

[0007] Furthermore, the center of gravity of the cam is eccentrically arranged with the transmission shaft. When the disconnector is in the open state, the open switch stop pin contacts the clockwise groove wall of the open switch circular arc groove, and the closing switch stop pin is close to the counterclockwise groove wall of the closing switch circular arc groove. When the transmission shaft rotates counterclockwise, the cam rotates synchronously with the open switch stop pin under the action of gravity until the cam contacts the interlocking rod, and the transmission shaft rotates idly until the closing switch stop pin contacts the counterclockwise groove wall of the closing switch circular arc groove. At this time, the disconnector is in the just-closed state. When the transmission shaft continues to rotate, the closing switch stop pin drives the cam to rotate synchronously to The cam pushes the interlocking rod to move the interlocking rod and avoid the circuit breaker from closing; when the disconnector is in the closed state, the opening stop pin is close to the opening arc groove wall in the clockwise direction, and the closing stop pin contacts the closing arc groove wall in the counterclockwise direction. When the transmission shaft rotates counterclockwise, the transmission shaft idles relative to the cam until the opening stop pin contacts the opening arc groove wall in the clockwise direction. At this time, the disconnector is in the just-opened state, and the transmission shaft continues to rotate. Under the action of the opening stop pin, the cam rotates synchronously with the transmission shaft to reset the interlocking rod and prevent the circuit breaker from closing.

[0008] Furthermore, the arc angle of the opening arc groove is greater than the arc angle of the closing arc groove, and the opening arc groove and the closing arc groove are arranged side by side in the axial direction and staggered in the circumferential direction.

[0009] Furthermore, the cam includes a wheel body and a cylinder body that can be sleeved on the transmission shaft, and the closing arc groove and the opening arc groove are both arranged on the cylinder body.

[0010] Furthermore, the closing stop pin and the opening stop pin are both arranged on the transmission shaft and overlap in the axial direction.

[0011] Furthermore, the closing stop pin and the opening stop pin can be detachable from the transmission shaft.

[0012] Furthermore, a transversely arranged pressing plate is hingedly connected to the upper portion of the interlocking rod, and the pressing plate is rotatably assembled on the supporting frame, and the cam cooperates with an end of the pressing plate away from the interlocking plate when rotating.

[0013] Furthermore, the transmission shaft is transmission-connected to the operating shaft via a four-bar structure.

[0014] Furthermore, the wheel body comprises a pair of cam plates, rollers are installed at the edge positions in the interval between the pair of cam plates, and the cams are pushed and matched with the interlocking rods through the rollers.

[0015] The interlocking device of the present invention proposes a brand-new technical solution, in which a cam is rotatably assembled on a transmission shaft, and a closing slot pin matching structure and an opening slot pin matching structure are arranged on the transmission shaft and the cam, so that in the process of the transmission shaft rotating from the opening state to the just-closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just-closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft rotating from the fully closed state to the just-opened state is the idling stroke of the transmission shaft relative to the cam, and in the process of rotating from the just-opened state to the fully-opened state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker. In this way, the transmission shaft has an idle stroke and a synchronous stroke when rotating relative to the cam, so that when the disconnector rotates from the open state to the just closed state and from the fully closed state to the just open state, the cam will not apply or release the corresponding force to the interlocking rod, and the interlocking rod will not complete or release the interlocking of the circuit breaker, thereby improving the reliability of the interlocking device, avoiding the occurrence of misclosing or misopening of the circuit breaker, and improving the safety of the interlocking device.

[0016] Another aspect of the present invention further provides a switch device, which adopts the following technical solution:

[0017] A switch device, comprising an isolation mechanism and a circuit breaker mechanism, an interlocking device is arranged between the isolation mechanism and the circuit breaker mechanism, the interlocking device comprises a support frame, a transmission shaft connected to the operating shaft of the isolation mechanism is arranged on the support frame, a cam is rotatably mounted on the transmission shaft, and an interlocking rod capable of guiding movement is arranged in cooperation with the cam, the interlocking rod is used to cooperate with the closing shaft of the circuit breaker, and the interlocking rod has a blocking state that can block the closing shaft to prevent it from closing and a evading state that avoids the closing shaft to release the blocking when it reciprocates; a closing slot pin matching structure and an opening slot pin matching structure are arranged on the transmission shaft and the cam, the closing slot pin matching structure comprises a closing arc groove and a closing stop pin, and the opening slot pin matching structure comprises an opening The arc groove and the opening stop pin, one of the corresponding stop pin and the arc groove is arranged on the transmission shaft, and the other is arranged on the cam. The circumferential positions of the arc groove and the corresponding stop pin in the two groove-pin matching structures satisfy: in the process of the transmission shaft rotating from the opening state to the just-closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just-closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft rotating from the fully closed state to the just-open state is the idling stroke of the transmission shaft relative to the cam, and in the process of rotating from the just-open state to the fully-open state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker.

[0018] Furthermore, the center of gravity of the cam is eccentrically arranged with the transmission shaft. When the disconnector is in the open state, the open switch stop pin contacts the clockwise groove wall of the open switch circular arc groove, and the closing switch stop pin is close to the counterclockwise groove wall of the closing switch circular arc groove. When the transmission shaft rotates counterclockwise, the cam rotates synchronously with the open switch stop pin under the action of gravity until the cam contacts the interlocking rod, and the transmission shaft rotates idly until the closing switch stop pin contacts the counterclockwise groove wall of the closing switch circular arc groove. At this time, the disconnector is in the just-closed state. When the transmission shaft continues to rotate, the closing switch stop pin drives the cam to rotate synchronously to The cam pushes the interlocking rod to move the interlocking rod and avoid the circuit breaker from closing; when the disconnector is in the closed state, the opening stop pin is close to the opening arc groove wall in the clockwise direction, and the closing stop pin contacts the closing arc groove wall in the counterclockwise direction. When the transmission shaft rotates counterclockwise, the transmission shaft idles relative to the cam until the opening stop pin contacts the opening arc groove wall in the clockwise direction. At this time, the disconnector is in the just-opened state, and the transmission shaft continues to rotate. Under the action of the opening stop pin, the cam rotates synchronously with the transmission shaft to reset the interlocking rod and prevent the circuit breaker from closing.

[0019] Furthermore, the arc angle of the opening arc groove is greater than the arc angle of the closing arc groove, and the opening arc groove and the closing arc groove are arranged side by side in the axial direction and staggered in the circumferential direction.

[0020] Furthermore, the cam includes a wheel body and a cylinder body that can be sleeved on the transmission shaft, and the closing arc groove and the opening arc groove are both arranged on the cylinder body.

[0021] Furthermore, the closing stop pin and the opening stop pin are both arranged on the transmission shaft and overlap in the axial direction.

[0022] Furthermore, the closing stop pin and the opening stop pin can be detachable from the transmission shaft.

[0023] Furthermore, a transversely arranged pressing plate is hingedly connected to the upper portion of the interlocking rod, and the pressing plate is rotatably assembled on the supporting frame, and the cam cooperates with an end of the pressing plate away from the interlocking plate when rotating.

[0024] Furthermore, the transmission shaft is transmission-connected to the operating shaft via a four-bar structure.

[0025] Furthermore, the wheel body comprises a pair of cam plates, rollers are installed at the edge positions in the interval between the pair of cam plates, and the cams are pushed and matched with the interlocking rods through the rollers.

[0026] The switch device of the present invention proposes a brand-new technical solution, in which a cam is rotatably assembled on a transmission shaft, and a closing slot pin matching structure and an opening slot pin matching structure are arranged on the transmission shaft and the cam, so that in the process of the transmission shaft rotating from the opening state to the just-closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just-closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft rotating from the fully closed state to the just-opened state is the idling stroke of the transmission shaft relative to the cam, and in the process of rotating from the just-opened state to the fully opened state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker. In this way, the transmission shaft has an idle stroke and a synchronous stroke when rotating relative to the cam, so that when the disconnector rotates from the open state to the just closed state and from the fully closed state to the just open state, the cam will not apply or release the corresponding force to the interlocking rod, and the interlocking rod will not complete or release the interlocking of the circuit breaker, thereby improving the reliability of the interlocking device, avoiding the occurrence of misclosing or misopening of the circuit breaker, and improving the safety of the interlocking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the interlocking state of the interlocking device when the isolation mechanism of a switch device of the present invention is in the open state;

[0028] Figure 2 for Figure 1 A local enlarged schematic diagram;

[0029] Figure 3 for Figure 2 Schematic diagram of the axial position of the center gate stop pin;

[0030] Figure 4 for Figure 2 Schematic diagram of the axial position of the middle closing stop pin, cam and pressure plate;

[0031] Figure 5 for Figure 1 A local enlarged schematic diagram of point B;

[0032] Figure 6 It is a structural schematic diagram of the opening arc groove and the closing arc groove provided on the cam sleeve;

[0033] Figure 7 for Figure 6 Schematic diagram of the cross section at AA in the middle;

[0034] Figure 8 for Figure 6 Schematic diagram of the cross section at the middle BB;

[0035] Fig. 9It is a schematic diagram of the interlocking state of the interlocking device when the operating shaft of the isolation mechanism of a switch device of the present invention is closed and rotated 60 degrees;

[0036] Fig.10 for Fig. 9 A local enlarged schematic diagram of point C;

[0037] Fig.11 for Fig.10 Schematic diagram of the axial position of the center gate stop pin;

[0038] Fig.12 for Fig.10 Schematic diagram of the axial position of the middle closing stop pin, cam and pressure plate;

[0039] Fig.13 It is a schematic diagram of the interlocking state of the interlocking device when the isolation mechanism of a switch device of the present invention is in the closed state;

[0040] Fig.14 for Fig.13 A local enlarged schematic diagram of point D;

[0041] Fig.15 for Fig.14 Schematic diagram of the axial position of the center gate stop pin;

[0042] Fig.16 for Fig.14 Schematic diagram of the axial position of the middle closing stop pin, cam and pressure plate;

[0043] Fig.17 for Fig.13 A local enlarged schematic diagram of point E;

[0044] Fig.18 It is a schematic diagram of the interlocking state of the interlocking device when the operating shaft of the isolation mechanism of a switch device of the present invention is rotated 30 degrees;

[0045] Fig.19 for Fig.18 A local enlarged schematic diagram of point F;

[0046] Fig. 20 for Fig.19 Schematic diagram of the axial position of the center gate stop pin;

[0047] Fig.21 for Fig.19 Schematic diagram of the axial position of the closing brake pin, cam and pressure plate.

[0048] In the figure: 1. Isolation mechanism; 2. Turntable; 3. Connecting rod; 4. Crank arm; 5. Transmission shaft; 6. Support frame; 7. Cam; 8. Pressure plate; 9. Interlocking rod; 10. Reset compression spring; 11. Circuit breaker closing plate; 12. Closing arc groove; 13. Opening arc groove; 14. Closing stop pin; 15. Opening stop pin; 16. Roller; 17. Cylinder; 18. Operating shaft. DETAILED DESCRIPTION

[0049] The present invention proposes a brand-new technical solution to the problems existing in the prior art. The core concept of the present invention is: a cam is rotatably assembled on a transmission shaft, and a closing slot pin matching structure and an opening slot pin matching structure are provided on the transmission shaft and the cam, so that in the process of the transmission shaft rotating from the opening state to the just-closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just-closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft rotating from the fully closed state to the just-opened state is the idling stroke of the transmission shaft relative to the cam, and in the process of rotating from the just-opened state to the fully-opened state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker. In this way, the transmission shaft has an idle stroke and a synchronous stroke when rotating relative to the cam, so that when the disconnector rotates from the open state to the just closed state and from the fully closed state to the just open state, the cam will not apply or release the corresponding force to the interlocking rod, and the interlocking rod will not complete or release the interlocking of the circuit breaker, thereby improving the reliability of the interlocking device, avoiding the occurrence of misclosing or misopening of the circuit breaker, and improving the safety of the interlocking device.

[0050] In view of the above technical problems, the interlocking device includes: Figure 1 The support frame 6 shown in the figure is provided with a transmission shaft 5 which is transmission-connected to the operating shaft 18 of the isolation mechanism 1. The transmission shaft 5 is rotationally mounted with a cam 7. A guide interlocking rod 9 which can be guided to move is provided in cooperation with the cam 7. The interlocking rod 9 is used to cooperate with the closing shaft of the circuit breaker. The interlocking rod 9 passes through the circuit breaker housing, and a guide structure which can guide the interlocking rod 9 is provided in the circuit breaker housing. A reset structure is also provided on the interlocking rod 9. The reset structure of this embodiment is one end of which is installed on the interlocking rod 9 and the other end is installed on the guide device. Figure 1 The reset spring 10 shown in the figure. In this way, the interlocking rod can reciprocate under the action of the cam 7 and the reset spring 10, and the circuit breaker closing switch plate 11 is installed on the closing shaft of the circuit breaker. When the interlocking rod 9 reciprocates, it has a blocking state that can block the closing shaft to prevent it from closing and a evading state that avoids the closing shaft to release the blocking. The transmission shaft 5 and the cam 7 are provided with a closing slot pin matching structure and an opening slot pin matching structure. The closing slot pin matching structure includes the following: Figure 2The closing arc groove 12 and closing stop pin 14, and the opening slot pin matching structure include an opening arc groove 13 and an opening stop pin 15, and one of the corresponding stop pin and the arc groove is arranged on the transmission shaft, and the other is arranged on the cam. The stop pin and the arc groove cooperate to realize the axial positioning of the cam 7 on the transmission shaft 5 on the one hand, and on the other hand, the transmission shaft 5 can be idling relative to the cam 7 within the arc angle range of the arc groove, and the structure is simple and easy to manufacture. The circumferential positions of the arc grooves and the corresponding stop pins in the two groove-pin matching structures satisfy the following requirements: in the process of the transmission shaft rotating from the open state to the just closed state, the transmission shaft 5 has an idling stroke relative to the rotation of the cam 7, and in the process of rotating from the just closed state to the fully closed state, the cam 7 rotates synchronously with the transmission shaft 5 and pushes the interlocking rod 9 to move to release the obstruction to the closing of the circuit breaker; the process of the transmission shaft 5 rotating from the fully closed state to the just open state is the idling stroke of the transmission shaft 5 relative to the cam 7, and in the process of rotating from the just opened state to the fully open state, the transmission shaft 5 rotates synchronously with the cam 7 and disengages from the interlocking rod 9 to reset it to block the closing of the circuit breaker. In this way, the transmission shaft 5 has an idle stroke and a synchronous stroke relative to the cam 7. By setting the corresponding relationship between the position of the idle stroke and the opening and closing rotation angle, the cam can prevent the interlocking rod 9 from applying or releasing the corresponding force when the disconnector is not opened or closed. At this time, the interlocking rod 9 will not complete or release the interlocking of the circuit breaker, thereby improving the reliability of the interlocking device, avoiding the phenomenon of misclosing or misopening the circuit breaker, and improving the safety of the interlocking device.

[0051] In this embodiment, the transmission shaft 5 rotates counterclockwise when the isolating switch is closed, and rotates clockwise when the isolating switch is opened. The center of gravity of the cam 7 is eccentric to the transmission shaft 5. Figure 2 As shown in FIG. 1 , the center of gravity of the cam 7 is located on the left side of the rotating shaft. Under this transmission structure, when the isolating switch is in the open state, as shown in FIG. Figure 3 , Figure 4 As shown, the opening stop pin 15 contacts the clockwise groove wall of the opening arc groove 13, and the closing stop pin 14 is close to the counterclockwise groove wall of the closing arc groove 12. When the transmission shaft 5 rotates counterclockwise, the cam 7 rotates synchronously with the opening stop pin 15 under the action of gravity until the cam 7 contacts the interlocking rod 9. Fig.10 , Fig.11 , Fig.12 As shown, the transmission shaft 5 idles until the closing stop pin 14 contacts the counterclockwise groove wall of the closing arc groove 12. At this time, the disconnector is in a just-closed state. When the transmission shaft 5 continues to rotate, the closing stop pin 14 drives the cam 7 to rotate synchronously so that the cam 7 pushes the interlocking rod 9, thereby moving the interlocking rod 9 and avoiding the circuit breaker from closing.

[0052] When the isolating switch is in the closed state, Fig.14 , Fig.15 , Fig.16 As shown, the opening stop pin 15 is close to the wall of the opening arc groove 13 in the clockwise direction, and the closing stop pin 14 is in contact with the wall of the closing arc groove 12 in the counterclockwise direction. When the transmission shaft 5 rotates counterclockwise, the transmission shaft 5 first rotates idly relative to the cam 7 until Fig.19 , Fig. 20 , Fig.21 As shown, the opening stop pin 15 contacts the wall of the opening arc groove 13 in the clockwise direction. At this time, the disconnector is in the just-opened state, the transmission shaft 5 continues to rotate, and the cam 7 rotates synchronously with the transmission shaft 5 under the action of the opening stop pin 15, so that the interlocking rod 9 is reset and the circuit breaker is blocked from closing. In this way, the control of the idle stroke and the synchronous stroke between the transmission shaft 5 and the cam 7 is realized simply and efficiently, and the reliability of the interlocking of the interlocking device is ensured.

[0053] The isolating switch in this embodiment needs to rotate its operating shaft 90 degrees clockwise or counterclockwise to be completely closed or opened, and its closing or opening process is divided into two stages: during the closing process, when the isolating switch operating shaft 18 rotates 60 degrees clockwise, the isolating switch is in a just-closed state; when the operating shaft continues to rotate 18 to 90 degrees, the isolating switch is in a fully closed state. During the opening process, when the isolating switch operating shaft 18 rotates 30 degrees counterclockwise, the isolating switch is in a just-opened state; when the operating shaft continues to rotate 18 to 90 degrees, the isolating switch is in a fully open state. The two stages of opening and closing of the isolating switch correspond one-to-one to the stages of different matching of the above-mentioned transmission shaft 5 and the cam 7.

[0054] The above is a combination of Figures 1 to 21 This is an example to illustrate that those skilled in the art will know that in other embodiments, the rotation direction of the transmission shaft during the opening and closing process can be opposite to the rotation direction of the transmission shaft in the above embodiments, and the installation orientation of the cam and the transmission shaft will change accordingly, which is consistent with the transmission process in the above embodiments.

[0055] In this embodiment, the arc angle of the opening arc groove 13 is greater than the arc angle of the closing arc groove 12, and the opening arc groove 13 and the closing arc groove 12 are arranged side by side in the axial direction and staggered in the circumferential direction. Figure 6 , Figure 7 , Figure 8 As shown, the arc angle of the closing arc groove 12 of this embodiment is 115 degrees, the arc angle of the opening arc groove is 170 degrees, and the closing arc groove and the opening arc groove are staggered at 45 degrees. In this way, the idle rotation angle of the transmission shaft 5 relative to the cam 7 when rotating counterclockwise or anti-clockwise can be controlled, and the cooperation between the transmission shaft 5 and the cam 7 can be controlled more finely. Of course, in other embodiments, the arc angles and staggered angles of the closing arc groove and the opening arc groove can also be designed as needed.

[0056] In this embodiment, the cam 7 includes a wheel body and Figure 6 The cylinder 17 shown can be sleeved on the transmission shaft, and the closing arc groove 12 and the opening arc groove 13 are both arranged on the cylinder 17. The stop pin in this embodiment is arranged on the transmission shaft, and the arc groove is arranged on the cam. This arrangement facilitates the installation and matching of the two, saving the installation cost. Of course, in other embodiments, the arc groove can also be arranged on the outer circumferential surface of the transmission shaft 5, and the stop pin that can match the arc groove can be arranged in the inner annular surface of the cam 7. In this embodiment, the arc groove is arranged on the cylinder 17 of the cam, and the arc groove is arranged on the cylinder. The processing is simple, saving the processing cost. Of course, in other embodiments, the arc groove can also be arranged on the wheel body part of the cam, and it is only necessary to ensure that the arc groove can match the corresponding stop pin.

[0057] In this embodiment, the closing stop pin 14 and the opening stop pin 15 are both arranged on the transmission shaft 5 and overlap in the axial direction. In addition, in other embodiments, the opening stop pin and the closing stop pin can also be arranged in an offset manner in the axial direction of the transmission shaft.

[0058] In this embodiment, the closing stop pin and the opening stop pin are detachable from the transmission shaft. The stop pin of this embodiment is detachable from the transmission shaft 5 through a threaded structure. In this way, when the cooperation between the transmission shaft 5 and the cam 7 is stuck or both are damaged, the stop pin that fixes the two axially can be removed. In this way, the cam or the transmission shaft can be replaced or repaired separately, saving maintenance costs. In addition, in other embodiments, the stop pin can also be fixedly installed on the transmission shaft.

[0059] In this embodiment, if Figure 1 , Fig. 9 , Fig.13As shown, a laterally arranged pressure plate 8 is hinged on the upper part of the interlocking rod 9, and the pressure plate 8 is rotatably mounted on the support frame, and the cam 7 cooperates with the pressure plate 8 when it rotates. In this embodiment, the middle part of the pressure plate 8 is rotatably mounted on the support frame 6, and the cam 7 cooperates with the end of the pressure plate 8 away from the interlocking rod 9 when it rotates. If the cam 7 cooperates directly with the interlocking rod 9, the top area of ​​the interlocking rod is small, and the cam can only apply a force to the interlocking rod 9 within a very small angle range when it rotates. Therefore, the cam 7 and the interlocking rod 9 need to cooperate accurately. The top area of ​​the laterally arranged pressure plate 8 is large, which avoids the inaccuracy of the interlocking caused by the position deviation between the cam 7 and the interlocking rod 9, and improves the reliability of the cooperation between the cam 7 and the interlocking rod 9. When the isolating switch is closed, the cam 7 rotates counterclockwise and presses down the pressure plate 8, and the other side of the pressure plate 8 rises and drives the interlocking rod 9 to rise. At this time, the interlocking rod 9 avoids the closing of the circuit breaker, and the circuit breaker can be closed; when the isolating switch is opened, the cam 7 rotates clockwise and releases the pressure plate 8, and the interlocking rod 9 is reset under the action of the reset spring 10. At this time, the interlocking rod 9 blocks the closing of the circuit breaker, and the circuit breaker cannot be closed. Of course, in other embodiments, the cam can also directly cooperate with the interlocking rod. At this time, the operating shaft of the isolating switch needs to be reversed when opening and closing, and the cooperation between the cam and the interlocking rod also changes in different processes, and a reset spring is provided on the interlocking rod. When the isolating switch is from opening to fully opening, the cam gradually presses down the interlocking rod to block the closing of the circuit breaker, and the reset spring accumulates energy at this time. When the isolating switch is from just closing to fully closing, the cam gradually moves away from the interlocking rod, and the interlocking rod rises under the action of the reset spring to release the blocking of the closing of the circuit breaker.

[0060] In this embodiment, the transmission shaft 5 is connected to the operating shaft 18 through a four-bar structure. The four-bar structure includes a rotating plate 2 as shown in the figure, the rotating plate 2 is connected to the operating shaft 18 of the isolating switch, a connecting rod 3 is overlapped on one side of the rotating plate 2, the connecting rod 3 is connected to a crank arm 4, and the other end of the crank arm 4 is rotatably mounted on the box body of the isolation mechanism and welded to the transmission shaft 5. In this way, the rotating plate 2, the connecting rod 3 and the crank arm 4 together constitute a four-bar structure to efficiently transmit the rotation of the isolating switch operating shaft to the transmission shaft 5. The four-bar structure is simple in structure, easy to manufacture, and can achieve effective transmission of rotation. In addition, in other embodiments, the transmission shaft can also be connected to the operating shaft through a coupling, and it is only necessary to ensure that the rotation of the operating shaft can be transmitted to the transmission shaft.

[0061] During use, when the isolating switch is closed, the operating shaft 18 rotates clockwise. At this time, the rotating plate 2 and the operating shaft 18 also rotate clockwise synchronously. The rotating plate 2 drives the connecting rod 3 to move, and transmits the movement to the crank arm 4 through the connecting rod 3, so that the crank arm 4 rotates counterclockwise. Because the crank arm 4 is welded to the transmission shaft 5, the transmission shaft 5 also rotates counterclockwise.

[0062] When the disconnector is opened, the operating shaft rotates counterclockwise. At this time, the rotating plate 2 rotates counterclockwise synchronously with the operating shaft. The rotating plate 2 pushes the connecting rod 3 to move, and transmits the movement to the crank arm 4 through the connecting rod 3, so that the crank arm 4 rotates clockwise, and the transmission shaft 5 welded to the crank arm 4 also rotates clockwise.

[0063] In this embodiment, the wheel body includes a pair of cam plates, and a roller 16 is installed at the edge position in the interval between the pair of cam plates, and the cam 7 cooperates with the interlocking rod 9 through the roller 16. In this way, the cooperation between the cam 7 and the interlocking plate is prevented from being stuck, and the reliability of the operation of the interlocking mechanism is improved. Of course, in other embodiments, the cam wheel body can also be a solid structure and directly cooperate with the interlocking rod.

[0064] Another aspect of the present invention provides a switch device, which includes an isolation mechanism 1 and a circuit breaker mechanism. An interlocking device is provided between the isolation mechanism and the circuit breaker mechanism. The interlocking device is the same as all the embodiments of the interlocking device described above, so it will not be described again here.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An interlocking device, characterized in that: The invention comprises a support frame, on which a transmission shaft connected to the operating shaft of the isolation mechanism is arranged, a cam is rotatably mounted on the transmission shaft, and a guide interlocking rod is arranged in cooperation with the cam, the interlocking rod is used to cooperate with the closing shaft of the circuit breaker, and the interlocking rod has a blocking state that can block the closing shaft to prevent it from closing and a evading state that avoids the closing shaft to release the blocking when it reciprocates; a closing slot pin matching structure and an opening slot pin matching structure are arranged on the transmission shaft and the cam, the closing slot pin matching structure includes a closing arc groove and a closing stop pin, and the opening slot pin matching structure includes an opening arc groove and an opening stop pin, and one of the corresponding stop pins and the arc groove is arranged On the transmission shaft, the other is arranged on the cam, and the circumferential positions of the arc groove and the corresponding stop pin in the two groove-pin matching structures meet the following requirements: in the process of the transmission shaft rotating from the open state to the just closed state, the transmission shaft has an idling stroke relative to the rotation of the cam, and in the process of rotating from the just closed state to the fully closed state, the cam rotates synchronously with the transmission shaft and pushes the interlocking rod to move to release the obstruction to the closing of the circuit breaker; in the process of the transmission shaft rotating from the fully closed state to the just open state, it is the idling stroke of the transmission shaft relative to the rotation of the cam, and in the process of rotating from the just opened state to the fully open state, the transmission shaft rotates synchronously with the cam and disengages from the interlocking rod to reset it to block the closing of the circuit breaker.

2. The interlocking device according to claim 1, characterized in that: The center of gravity of the cam is eccentrically arranged with the transmission shaft. When the disconnector is in the open state, the open stop pin contacts the clockwise groove wall of the open arc groove, and the closing stop pin is close to the counterclockwise groove wall of the closing arc groove. When the transmission shaft rotates counterclockwise, the cam rotates synchronously with the open stop pin under the action of gravity until the cam contacts the interlocking rod, and the transmission shaft rotates idly until the closing stop pin contacts the counterclockwise groove wall of the closing arc groove. At this time, the disconnector is in the just-closed state. When the transmission shaft continues to rotate, the closing stop pin drives the cam to rotate synchronously so that the cam The wheel pushes the interlocking rod to move the interlocking rod and avoid the closing of the circuit breaker; when the disconnector is in the closed state, the opening stop pin is close to the opening arc groove wall in the clockwise direction, and the closing stop pin contacts the closing arc groove wall in the counterclockwise direction. When the transmission shaft rotates counterclockwise, the transmission shaft idles relative to the cam until the opening stop pin contacts the opening arc groove wall in the clockwise direction. At this time, the disconnector is in the just-opened state, and the transmission shaft continues to rotate. Under the action of the opening stop pin, the cam rotates synchronously with the transmission shaft to reset the interlocking rod and prevent the circuit breaker from closing.

3. The interlocking device according to claim 2, characterized in that: The arc angle of the opening arc groove is greater than the arc angle of the closing arc groove, and the opening arc groove and the closing arc groove are arranged side by side in the axial direction and staggered in the circumferential direction.

4. The interlocking device according to any one of claims 1 to 3, characterized in that: The cam comprises a wheel body and a cylinder body which can be sleeved on the transmission shaft, and the closing arc groove and the opening arc groove are both arranged on the cylinder body.

5. The interlocking device according to claim 4, characterized in that: The closing stop pin and the opening stop pin are both arranged on the transmission shaft and overlap in the axial direction.

6. The interlocking device according to claim 4, characterized in that: The closing stop pin and the opening stop pin can be detached from the transmission shaft.

7. The interlocking device according to any one of claims 1 to 3, characterized in that: A transversely arranged pressing plate is hinged on the upper part of the interlocking rod, and the pressing plate is rotatably assembled on the supporting frame. When the cam rotates, it cooperates with the end of the pressing plate away from the interlocking plate.

8. The interlocking device according to any one of claims 1 to 3, characterized in that: The transmission shaft is transmission-connected to the operating shaft via a four-bar structure.

9. The interlocking device according to claim 4, characterized in that: The wheel body comprises a pair of cam plates, rollers are installed at the edge positions in the intervals between the pair of cam plates, and the cams are pushed and matched with the interlocking rods through the rollers.

10. A switch device, characterized in that: It comprises an isolation mechanism and a circuit breaker mechanism, wherein an interlocking device as claimed in any one of claims 1 to 9 is arranged between the isolation mechanism and the circuit breaker mechanism.

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