A closing locking detent system and control method for a spring operating mechanism

Abstract

The present invention belongs to the technical field of high-voltage power transmission and transformation, and discloses a closing locking detent system and a control method for a spring operating mechanism. An opening electromagnet is installed above the wall plate. A first screw shaft is screwed to the upper right of the opening electromagnet. An upper-stage opening detent and a torsion spring are fixedly sleeved above the first screw shaft through a nut. A second screw shaft is screwed to the wall plate above the upper right of the first screw shaft. A lower-stage opening detent is fixedly sleeved above the second screw shaft through a screw. The left end of the lower-stage opening detent is fixedly connected to the right end of the upper-stage opening detent. The right end of the lower-stage opening detent is fixedly connected above the main opening detent. The present invention has reliable opening and closing locking, stable mechanical characteristics, and large output power, solves the principle structure problem that it is difficult for the large-power spring operating mechanism of the current high-voltage circuit breaker to act in a coordinated manner due to a large number of detent stages, and has important significance for the development of the national power system; the structure is simple, stable, and the locking is reliable, realizing the coordinated control of multiple spring operating mechanism detents.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage power transmission and transformation, and particularly relates to a closing locking detent system and a control method for a spring operating mechanism. Background Art

[0002] At present, the closest prior art: The spring operating mechanism is an important device in the field of high-voltage power transmission and transformation and an important part of a high-voltage circuit breaker. The closing and opening operations of the high-voltage circuit breaker are realized through the operating mechanism. The spring operating mechanism has the characteristics of low cost, simple structure, intuitive principle, and less maintenance, and is suitable for extensive use on high-voltage circuit breakers.

[0003] At present, the spring operating mechanisms applied to high-voltage circuit breakers generally have the "phenomenon of separating immediately after closing", that is, there is a hidden danger that the closing position cannot be locked. Especially for high-power spring mechanisms, due to the large number of locking detent stages, it is very difficult for each stage of detents to complete the buckling and locking successively within the same extremely short time at the same moment. If this problem cannot be solved well, it will seriously affect the safe and reliable operation of the spring mechanism. With the development of the national power system, the continuous increase of system capacity, the continuous increase of transmission voltage, and the progress of circuit breaker technology urgently require high-power spring operating mechanisms. The State Grid operation more needs a new type of spring operating mechanism with reliable closing and opening locking, stable mechanical characteristics, and large output power.

[0004] In summary, the problems existing in the prior art are: At present, for the high-power spring operating mechanisms of high-voltage circuit breakers, due to the large number of detent stages, it is difficult to achieve coordinated actions.

[0005] The difficulty in solving the above technical problems: How to improve the structure of the closing locking detent system for the spring operating mechanism so that the opening detents at all levels, the main opening detent, and the auxiliary opening detent can act in coordination.

[0006] The significance of solving the above technical problems: The present invention has reliable closing and opening locking, stable mechanical characteristics, and large output power, solves the problem of the principle structure that it is difficult for the high-power spring operating mechanisms of high-voltage circuit breakers to achieve coordinated actions due to the large number of detent stages at present, and has important significance for the development of the national power system. Summary of the Invention

[0007] Aiming at the problems existing in the prior art, the present invention provides a closing locking detent system and a control method for a spring operating mechanism.

[0008] The present invention is implemented as follows. A closing locking detent control method for a spring operating mechanism, the closing locking detent control method for the spring operating mechanism includes: closing and opening;

[0009] The closing control method of the spring operating mechanism using the closing locking latch comprises: when the spring operating mechanism starts the closing action, the connecting rod is pulled to the left by the closing spring, and the cam is driven to rotate counterclockwise around the cam shaft through the connecting shaft, the cam drives the third roller to rotate, and drives the crank arm to rotate clockwise around the crank arm shaft, and at the same time, the guide wing and the fourth roller also rotate clockwise together, and the guide wing and the fourth roller successively lift the auxiliary opening latch upward during the rotation; when the closing is terminated, the fourth roller passes over the concave platform part of the auxiliary opening latch, and the auxiliary opening latch is pressed downward under the action of the second torsion spring, the fourth roller is clamped, the crank arm is locked, and the crank arm is rotated back under the action of the opening spring;

[0010] The opening control method of the spring operating mechanism using the closing locking latch includes: the opening electromagnet is energized to cause the moving iron core rod to move to the right, pushing the first-level opening latch to rotate counterclockwise, and releasing the constraint on the second-level opening latch. At this time, the second-level opening latch and the main opening latch are subjected to the force of the opening spring through the auxiliary opening latch and the fourth roller and the crank arm, and rotate counterclockwise together, so that the crank arm can complete the opening action.

[0011] Furthermore, the auxiliary opening brake catch of the closing locking brake catch control method of the spring operating mechanism is constrained by the main opening brake catch and can no longer be lifted upward. The main opening brake catch is stuck by the secondary opening brake catch via the second roller, and the secondary opening brake catch is stuck by the primary opening brake catch via the first roller.

[0012] Furthermore, during the closing process, the spring operating mechanism uses the closing locking latch control method, and the first-level opening latch, the second-level opening latch, and the main opening latch do not need to be moved. Only the negative opening latch is lifted and lowered to lock the crank arm in the closing position.

[0013] Furthermore, after the opening action of the spring operating mechanism using the closing locking latch control method is completed, the opening electromagnet disconnects the electric iron core rod and resets, the first-level opening latch rotates clockwise under the action of the first torsion spring and also resets, the second-level opening latch rotates clockwise under the action of the second torsion spring and resets, the main opening latch and the auxiliary opening latch are constrained to each other as a whole, and are also reset under the action of the second torsion spring.

[0014] Another object of the present invention is to provide a spring operating mechanism closing lock catch system for implementing the spring operating mechanism closing lock catch control method, wherein the spring operating mechanism closing lock catch system is provided with:

[0015] Siding;

[0016] Above the wall panel, an opening electromagnet is installed. A first screw shaft is screwed above the right upper part of the opening electromagnet. Above the first screw shaft, a first-stage opening detent and a torsion spring are fixedly sleeved through a nut. A second screw shaft is screwed on the wall panel above the right upper part of the first screw shaft. Above the second screw shaft, a second-stage opening detent is fixedly sleeved through a screw. The left end of the second-stage opening detent is fixedly connected to the right end of the first-stage opening detent. The right end of the second-stage opening detent is fixedly connected above the main opening detent. The right end of the main opening detent is fixedly connected with a secondary opening detent. The left side shaft of the main opening detent is fixedly installed in the wall panel hole through a washer. The lower part of the secondary opening detent is in contact connection with a guiding fin. The guiding fin is fixedly connected with a toggle arm. Below the toggle arm, there is a fixed contact connection with a cam. The left side of the cam is connected with a connecting rod.

[0017] Furthermore, bearings are fitted in the inner holes of the first-stage opening detent and the second-stage opening detent. The left end of the second-stage opening detent fits a first roller into the opening groove and positions and fixes it at the right end of the first-stage opening detent with a first pin.

[0018] Furthermore, a second roller is placed in the groove above the main opening detent. A second pin passes through the holes of the main opening detent and the second roller, and a snap ring is used to fix the right end of the second-stage opening detent.

[0019] Furthermore, a bearing is embedded in the left end hole of the main opening detent. After a bushing is embedded in the hole of the secondary opening detent, it is installed in the right end groove of the main opening detent. A third pin passes through the holes of the main opening detent and the secondary opening detent, and is fixed with a snap ring.

[0020] Furthermore, a fourth roller with an embedded bearing is installed in the left end groove of the toggle arm. Gaskets are added on both the upper and lower sides of the fourth roller. A fifth pin is installed in the holes of the toggle arm and the fourth roller, and a limit card board is used to fixedly connect the fifth pin to the guiding fin.

[0021] Above the left side shaft of the main opening detent, a support is sleeved and fixed on the wall panel with bolts.

[0022] A third roller with an embedded bearing is installed in the lower groove of the toggle arm. A fourth pin is installed in the holes of the toggle arm and the roller, and is fixed with a snap ring.

[0023] Another object of the present invention is to provide an application of the closing locking detent control method for the spring operating mechanism in high-voltage power transmission and transformation.

[0024] In summary, the advantages and positive effects of the present invention are as follows: The mechanical structure of the present invention is simple, stable, and has reliable locking, realizing coordinated control of multiple latch mechanisms of the spring operating mechanism. In the present invention, bearings are assembled in the inner holes of the first-stage opening latch and the second-stage opening latch, which can make the first-stage and second-stage opening latches rotate under force, facilitating control. The use of the second roller and the second pin shaft fixed connection hole in the present invention can reduce the resistance of the connection hole position to the rotation of the opening latch, and the spring retaining ring used can fix the end of the opening latch to prevent misalignment and ensure a stable structure. The spring retaining ring used in the present invention can fix the ends of the main opening latch and the auxiliary opening latch to prevent misalignment and ensure a stable structure.

[0025] The limit card plate used in the present invention can prevent the guiding fin from exceeding the limit during rotation, ensuring a stable structure. The production set in the present invention has a positioning function to prevent misalignment. The spring retaining ring set in the present invention can fix the end of the toggle arm to prevent misalignment and ensure a stable structure.

[0026] The present invention has reliable closing and opening locking, stable mechanical characteristics, and large output power. It solves the principle structure problem that it is difficult for the large-power spring operating mechanism of high-voltage circuit breakers to achieve consistent and coordinated actions due to the large number of latch stages, which is of great significance to the development of the national power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the closing locking latch system for a spring operating mechanism provided by an embodiment of the present invention;

[0028] Figure 2 is a schematic closing structure diagram of the closing locking latch system for a spring operating mechanism provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the closing action process of the closing locking latch system for a spring operating mechanism provided by an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the opening action process of the closing locking latch system for a spring operating mechanism provided by an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the structures of various components of the closing locking latch system for a spring operating mechanism provided by an embodiment of the present invention; (a) Schematic connection structure diagram of the first-stage opening latch; (b) Schematic connection structure diagram of the second-stage opening latch; (c) Schematic connection structure diagram of the main opening latch; (d) Schematic connection structure diagram of the toggle arm and the fifth pin shaft; (e) Schematic connection structure diagram of the toggle arm and the fourth pin shaft; (f) Schematic connection structure diagram of the shaft and the support;

[0032] Figure 6 is a schematic installation diagram of the closing locking latch device on a spring operating mechanism provided by an embodiment of the present invention;

[0033] In the figure: 1. Shunt electromagnet; 2. First screw shaft; 3. First-stage shunt detent; 4. First torsion spring; 5. First roller; 6. First pin; 7. Second-stage shunt detent; 8. Second screw shaft; 9. Second pin; 10. Second roller; 11. Third pin; 12. Torsion spring shaft; 13. Main shunt detent; 14. Second torsion spring; 15. Sub-shunt detent; 16. Guide fin; 17. Toggle arm; 18. Toggle arm shaft; 19. Fourth pin; 20. Third roller; 21. Camshaft; 22. Connecting shaft; 23. Cam; 24. Connecting rod; 25. Fifth pin; 26. Fourth roller; 27. Shaft; 28. Support; 29. Wall panel. Detailed implementation mode

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] As Figure 1 shown, the closing locking detent system for a spring operating mechanism provided by an embodiment of the present invention includes: a shunt electromagnet 1, a first screw shaft 2, a first-stage shunt detent 3, a first torsion spring 4, a first roller 5, a first pin 6, a second-stage shunt detent 7, a second screw shaft 8, a second pin 9, a second roller 10, a third pin 11, a torsion spring shaft 12, a main shunt detent 13, a second torsion spring 14, a sub-shunt detent 15, a guide fin 16, a toggle arm 17, a toggle arm shaft 18, a fourth pin 19, a third roller 20, a camshaft 21, a connecting shaft 22, a cam 23, a connecting rod 24, a fifth pin 25, a fourth roller 26, a shaft 27, a support 28, and a wall panel 29.

[0037] A shunt electromagnet 1 is installed above the wall panel 29. A first screw shaft 2 is screwed to the upper right of the shunt electromagnet 1. Above the first screw shaft 2, a first-stage shunt detent 3 and a torsion spring 4 are fixedly sleeved through a nut. A second screw shaft 8 is screwed to the wall panel 29 above the upper right of the first screw shaft 2. Above the second screw shaft 8, a second-stage shunt detent 7 is fixedly sleeved through a screw. The left end of the second-stage shunt detent 7 is fixedly connected to the right end of the first-stage shunt detent 3. The right end of the second-stage shunt detent 7 is fixedly connected above the main shunt detent 13. The right end of the main shunt detent 13 is fixedly connected to a sub-shunt detent 15. The left side shaft 27 of the main shunt detent 13 is fixedly installed in the hole of the wall panel 29 through a washer. The lower part of the sub-shunt detent 15 is in contact connection with a guide fin 16. The guide fin 16 is fixedly connected to a toggle arm 17. The lower part of the toggle arm 17 is fixedly in contact connection with a cam 23. The left side of the cam 23 is connected to a connecting rod 24.

[0038] Preferably, the inner hole of the first-stage gate-breaking latch 3 is equipped with a bearing, and the inner hole of the second-stage gate-breaking latch 7 is equipped with a bearing. The first roller 5 is installed in the open groove at the left end of the second-stage gate-breaking latch 7, and is positioned and fixed at the right end of the first-stage gate-breaking latch 3 by the first axle pin 6.

[0039] Preferably, the second roller 10 is placed in the groove above the main opening brake catch 13, the second axle pin 9 is inserted into the holes of the main opening brake catch 13 and the second roller 10, and the right end of the secondary opening brake catch 7 is fixed with a spring retaining ring.

[0040] Preferably, the left end hole of the main brake catch 13 is embedded in the bearing, the auxiliary brake catch 15 is embedded in the hole of the shaft sleeve and then installed in the right end groove of the main brake catch 13, and the third shaft pin 11 is inserted into the holes of the main brake catch 13 and the auxiliary brake catch 15, and fixed with a spring retaining ring.

[0041] Preferably, a fourth roller 26 embedded in a bearing is installed in the left end groove of the crank arm 17, gaskets are installed on the upper and lower sides of the fourth roller 26, the fifth axle pin 25 is installed in the holes of the crank arm 17 and the fourth roller 26, and the fifth axle pin 25 is fixedly connected to the guide wing with a limiting clamp.

[0042] Preferably, a support 28 is mounted above the left side shaft 27 of the main opening brake latch 13 and is fixed to the wall plate 29 with bolts.

[0043] Preferably, a third roller 20 embedded in a bearing is installed in the groove below the crank arm 17, and the fourth shaft pin 19 is installed in the holes of the crank arm 17 and the roller 20 and fixed with a spring retaining ring.

[0044] The working principle of the present invention is described in detail below in conjunction with the accompanying drawings.

[0045] (1) Closing process: Figure 3 As shown, when the spring operating mechanism starts the closing action, the connecting rod 24 is pulled to the left by the closing spring, and the cam 23 is driven to rotate counterclockwise around the cam shaft 21 through the connecting shaft 22. The cam 23 drives the third roller 20 to rotate, and drives the crank arm 17 to rotate clockwise around the crank arm shaft 18. At the same time, the guide wing 16 and the fourth roller 26 also rotate clockwise together. During the rotation, the guide wing 16 and the fourth roller 26 successively lift the auxiliary opening brake catch 15 upward. When the closing is terminated, the fourth roller 26 has passed over the concave part of the auxiliary opening brake catch 15. The auxiliary opening brake catch 15 is pressed downward under the action of the second torsion spring 14, and the fourth roller 26 is stuck, and the crank arm 17 is locked, so that the crank arm 17 cannot rotate back (counterclockwise) under the action of the opening spring. Figure 2As shown, the secondary opening pawl 15 is restricted by the main opening pawl 13 and can no longer be lifted upward. The main opening pawl 13 is locked by the secondary opening pawl 7 via the second roller 10, and the secondary opening pawl 7 is locked by the primary opening pawl 3 via the first roller 5. During the closing process, the primary opening pawl 3, the secondary opening pawl 7, and the main opening pawl 13 do not need to act. Only the negative opening pawl 15 needs to lift and fall to lock the toggle arm 17 in the closed position.

[0046] (2) Opening process: As Figure 4 shown, when the opening electromagnet 1 is energized, the moving iron core rod moves to the right, pushing the primary opening pawl 3 to rotate counterclockwise, thus releasing the restraint on the secondary opening pawl 7. At this time, the secondary opening pawl 7 and the main opening pawl 13, via the secondary opening pawl 15, the fourth roller 26, and the toggle arm 17, are subjected to the force of the opening spring and rotate counterclockwise together, enabling the toggle arm 17 to complete the opening action. When the opening is in place, as Figure 1 shown. After the opening action is completed, the opening electromagnet 1 is de-energized and the moving iron core rod returns to its original position. The primary opening pawl 3 rotates clockwise and returns to its original position under the action of the first torsion spring 4. The secondary opening pawl rotates clockwise and returns to its original position under the action of the second torsion spring 14. The main opening pawl 13 and the secondary opening pawl 15 are mutually restricted and integrated, and also return to their original positions under the action of the second torsion spring 14.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A closing locking detent control method for a spring operating mechanism, characterized in that The control method of the closing lock latch for the spring operating mechanism comprises: closing and opening the switch; The closing control method of the spring operating mechanism using the closing locking latch comprises: when the spring operating mechanism starts the closing action, the connecting rod is pulled to the left by the closing spring, and the cam is driven to rotate counterclockwise around the cam shaft through the connecting shaft, the cam drives the third roller to rotate, and drives the crank arm to rotate clockwise around the crank arm shaft, and at the same time, the guide wing and the fourth roller also rotate clockwise together, and the guide wing and the fourth roller successively lift the auxiliary opening latch upward during the rotation; when the closing is terminated, the fourth roller passes over the concave platform part of the auxiliary opening latch, and the auxiliary opening latch is pressed downward under the action of the second torsion spring, the fourth roller is clamped, the crank arm is locked, and the crank arm is rotated back under the action of the opening spring; The opening control method of the closing lock catch of the spring operating mechanism includes: the opening electromagnet is energized to make the moving iron core rod move rightward, pushing the first-level opening catch to rotate counterclockwise, and releasing the constraint on the second-level opening catch. At this time, the second-level opening catch and the main opening catch are subjected to the force of the opening spring through the auxiliary opening catch and the fourth roller and the crank arm, and rotate counterclockwise together, so that the crank arm can complete the opening action; The auxiliary opening brake catch of the spring operating mechanism using the closing locking brake control method is constrained by the main opening brake catch and can no longer be lifted upward. The main opening brake catch is stuck by the secondary opening brake catch through the second roller, and the secondary opening brake catch is stuck by the primary opening brake catch through the first roller. The spring operating mechanism uses the closing locking latch control method. During the closing process, the first-level opening latch, the second-level opening latch, and the main opening latch do not need to be moved, and only the negative opening latch is lifted and lowered to lock the crank arm in the closing position; After the opening action of the spring operating mechanism using the closing locking latch control method is completed, the opening electromagnet disconnects the electric iron core rod and resets, the first-level opening latch rotates clockwise under the action of the first torsion spring and also resets, the second-level opening latch rotates clockwise under the action of the second torsion spring and resets, the main opening latch and the auxiliary opening latch are constrained to form a whole, and are also reset under the action of the second torsion spring.

2. A closing locking detent system for a spring operating mechanism implementing the closing locking detent control method according to claim 1, characterized in that The closing locking latch system for the spring operating mechanism is provided with: Siding; A tripping electromagnet is installed above the wall panel, and a first screw shaft is screwed on the upper right side of the tripping electromagnet, and a first-level tripping latch and a torsion spring are fixedly mounted on the first screw shaft through a nut; a second screw shaft is screwed on the wall panel on the upper right side of the first screw shaft, and a second-level tripping latch is fixedly mounted on the second screw shaft through a screw, and the left end of the second-level tripping latch is fixedly connected to the right end of the first-level tripping latch; the right end of the second-level tripping latch is fixedly connected to the top of the main tripping latch; the right end of the main tripping latch is fixedly connected to the auxiliary tripping latch, and the left side shaft of the main tripping latch is fixedly installed in the hole of the wall panel through a washer, and a guide wing is contacted and connected below the auxiliary tripping latch, and a crank arm is fixedly connected to the guide wing, a cam is fixedly contacted and connected below the crank arm, and a connecting rod is connected to the left side of the cam.

3. The closing locking detent system for a spring operating mechanism according to claim 2, characterized in that The inner hole of the first-stage gate-breaking catch is equipped with a bearing, and the inner hole of the second-stage gate-breaking catch is equipped with a bearing. The first roller is installed into the open groove at the left end of the second-stage gate-breaking catch, and is positioned and fixed at the right end of the first-stage gate-breaking catch by the first shaft pin.

4. The closing locking detent system for a spring operating mechanism according to claim 2, characterized in that Place the second roller in the groove above the main circuit breaker pawl, insert the second pin through the holes of the main circuit breaker pawl and the second roller, and fix the right end of the secondary circuit breaker pawl with a circlip.

5. The closing locking detent system for a spring operating mechanism according to claim 2, characterized in that Insert a bearing into the left end hole of the main circuit breaker pawl. After inserting a bushing into the hole of the secondary circuit breaker pawl, install it in the right end groove of the main circuit breaker pawl. Insert the third pin through the holes of the main circuit breaker pawl and the secondary circuit breaker pawl, and fix it with a circlip.

6. The closing locking detent system for a spring operating mechanism according to claim 2, characterized in that Install the fourth roller with an embedded bearing in the left end groove of the toggle arm. Add gaskets on both the upper and lower sides of the fourth roller. Install the fifth pin into the holes of the toggle arm and the fourth roller, and fix the fifth pin to the guiding fin with a limit retaining plate. A support is sleeved above the left side shaft of the main circuit breaker pawl, and it is fixed to the wall panel with bolts. Install the third roller with an embedded bearing in the lower groove of the toggle arm. Insert the fourth pin into the holes of the toggle arm and the roller, and fix it with a circlip.

7. An application of the closing locking detent control method for a spring operating mechanism according to claim 1 in high-voltage power transmission and transformation.

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