Lock catch device and using method thereof

Abstract

The invention discloses a locking device and a using method thereof. The lock catch device comprises a moving contact assembly and a lock catch assembly, the moving contact assembly comprises a lock catch rod, a concave groove is formed in the lock catch end of the lock catch rod, the lock catch assembly comprises a lock catch shaft, a tripping piece and a lock catch base, the lock catch shaft is rotationally arranged in the lock catch base along the Y-direction axis, the tripping piece is arranged on the lock catch shaft, and an X-direction guide hole is formed in the lock catch base. A half shaft located in the guide hole is arranged on the lock catch shaft, the lock catch end of the lock catch rod extends into the guide hole, the concave groove of the lock catch position is matched with the half shaft in a lock catch mode, and the concave groove of the unlocking position is separated from the half shaft. The use method adopts the locking device. The beneficial effects of the invention are that closing mechanical holding of the electrical switch can be realized, the closing reliability is improved, and the opening control complexity is reduced. And the double tripping deflector rods are arranged, so that symmetrical redundancy of tripping and opening of the electrical switch can be realized. The locking device realizes opening through tripping, is applied to an electrical switch, and can realize rapidity and reliability of opening.

Description

Technical Field

[0001] This application belongs to the technical field of electrical switches, and particularly relates to a locking device and its usage method, which can be used for the DC magnetic field breaker of the excitation system of large generator sets. Background Art

[0002] In the conventional closing holding method of circuit breakers, the electrical holding has relatively low overall reliability due to the influence of all unreliable factors in the control circuit. The magnetic holding requires reverse energization of the closing electromagnetic mechanism during all opening operations, increasing the complexity of control.

[0003] The magnetic field breaker requires a faster voltage build-up speed. In the conventional opening method, in addition to separating the moving contact, due to the large mass and inertia of the opening auxiliary moving parts, such as the moving iron core of the closing electromagnetic mechanism and the locking mechanism, and the limited opening power provided by the opening spring, it is impossible to quickly separate the moving contact, the moving iron core of the electromagnetic mechanism, the locking mechanism, etc. at the same time, resulting in a low opening speed of the contact and restricting the rapidity of the voltage build-up speed of the circuit breaker. At the same time, to ensure the reliability of fault magnetic extinction in the DC excitation system, the DC magnetic field breaker must have an opening redundancy design. Therefore, it is required that the DC magnetic field breaker should have an independent tripping and opening actuator. Summary of the Invention

[0004] The purpose of this application is: This application provides a locking device and its usage method, which solves the problem that the existing circuit breaker cannot open quickly.

[0005] The purpose of this application is achieved through the following technical solutions: A locking device includes a moving contact assembly and a locking assembly. The moving contact assembly includes a locking rod, and the locking end of the locking rod is provided with a concave groove. The locking assembly includes a locking shaft, a tripping member, and a locking base. The locking shaft is rotatably arranged along the Y-axis in the locking base, the tripping member is provided on the locking shaft, the locking base is provided with a guiding hole in the X-direction, the locking shaft is provided with a half shaft located in the guiding hole, the locking end of the locking rod extends into the guiding hole, and the concave groove at the locking position is locked and matched with the half shaft, and the concave groove at the unlocking position is disengaged from the half shaft.

[0006] Further, the locking assembly further includes a tripping dial as the tripping member, and the tripping dial is provided on the locking shaft.

[0007] Further, the tripping dial is provided at both ends of the locking shaft.

[0008] Further, the locking assembly further includes a locking push block, a locking spring, and a spring guiding rod. The locking push block is movably arranged in the guiding hole and is arranged opposite to the half shaft. The top end of the spring guiding rod abuts against the back surface of the locking push block, and the bottom end of the spring guiding rod is provided with a locking spring.

[0009] Further, the front surface of the latch push block is an arc-shaped rod contact surface.

[0010] Further, a latch spherical surface is provided at the top end of the spring guide rod, and the latch spherical surface is located in the hemispherical groove on the back surface of the latch push block.

[0011] Further, the latch assembly further includes a shaft return spring and a shaft return plate. The shaft return plate is arranged on the latch shaft, and the shaft return spring acts on the shaft return plate to provide a moment for the latch shaft to rotate from the unlocked position to the latched position.

[0012] Further, the latch assembly further includes a shaft adjustment screw, and the shaft adjustment screw acts on the shaft return plate to calibrate the latched position of the latch shaft.

[0013] Further, a conductive positioning copper block is further included. The moving contact assembly further includes a closing spring and a moving contact rod. The bottom end of the moving contact rod is swingably arranged on the conductive positioning copper block, the top end of the moving contact rod is hinged to the contact end of the latch rod, and a closing spring is arranged between the latch base and the moving contact rod.

[0014] Further, two latch rods are arranged, and the two latch rods are respectively hinged on both sides of the moving contact rod, and the latched ends of the two latch rods respectively extend into the guide holes on both sides of the latch base.

[0015] Further, an overcurrent release assembly is further included, and the overcurrent release assembly acts on the shaft return plate as a release part.

[0016] Further, the conductive positioning copper block is arranged through the overcurrent release assembly. The overcurrent release assembly includes an assembly main body, a release lever and a release moving iron core. The release moving iron core is arranged to move up and down on the assembly main body, the release moving iron core is connected to the release lever, and the release lever during overcurrent acts on the shaft return plate to provide a moment for the latch shaft to rotate from the latched position to the unlocked position.

[0017] Further, the overcurrent release assembly further includes a release guide shaft and a release reaction spring. The release moving iron core is connected to the release guide shaft, the release guide shaft is arranged to move up and down and slidably sleeved on the assembly main body, and a release reaction spring is arranged between the assembly main body and the release moving iron core.

[0018] Further, the overcurrent release assembly further includes a release pull rod. Release pull rods are connected to both sides of the release moving iron core, the release lever is clamped between the release pull rods through a nut, and the release lever is located between the release pull rods on both sides.

[0019] A usage method of a latch device, adopting the above latch device; Closing: The moving contact assembly is subjected to a closing thrust, and the latched ends of the latch rods move into the guide holes until the concave groove is latched and matched with the half shaft. Closing hold: When the closing thrust on the moving contact assembly disappears, the concave groove and the half shaft remain in the locked state. Tripping: When the tripping component receives the tripping force, the locking shaft rotates from the locked position to the unlocked position, the concave groove disengages from the half shaft, and the locking lever withdraws from the guiding hole.

[0020] Advantages of this application: It can achieve mechanical holding for closing of the electrical switch, improve the reliability of closing, and reduce the complexity of tripping control. There is a double tripping lever, which can achieve symmetrical redundancy for tripping and opening of the electrical switch. The locking device trips to open, and when applied to the electrical switch, it can achieve rapidity and reliability of opening.

[0021] The main solution of this application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; moreover, in this application, (among various non-conflicting alternatives) the alternatives can be freely combined with each other and with other alternatives. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of this application, all of which are the technical solutions to be protected in this application, and will not be enumerated here. Description of the Drawings

[0022] Figure 1 It is the structural schematic diagram of this application.

[0023] Figure 2 It is the sectional view of this application along the ZX plane of the locking lever (tripping state).

[0024] Figure 3 It is the structural schematic diagram of the locking component of this application.

[0025] Figure 4 It is the sectional view of this application along the ZX plane of the locking lever (locked state).

[0026] Figure 5 It is the sectional view of this application along the ZX plane of the tripping guiding shaft.

[0027] Figure 6 It is the sectional view of this application along the ZY plane of the tripping guiding shaft.

[0028] Figure 7 It is the structural schematic diagram of the locking shaft of this application.

[0029] Figure 8 It is the structural schematic diagram of the locking lever of this application.

[0030] Figure 9 It is the partial structural schematic diagram of the overcurrent tripping device assembly of this application.

[0031] In the figure: 1. Conductive positioning copper block; 2. Moving contact assembly; 21. Tripping spring; 22. Moving contact rod; 23. Locking rod; 24. Concave groove; 25. Locking surface; 3. Locking assembly; 31. Locking shaft; 32. Tripping dial; 33. Locking base; 34. Locking push block; 35. Locking spring; 36. Spring guide rod; 37. Shaft return spring; 38. Shaft return plate; 39. Shaft adjustment screw; 310. Guide hole; 311. Half shaft; 312. Locking edge; 313. Locking spherical surface; 4. Overcurrent tripping device assembly; 41. Tripping lever; 42. Tripping guide shaft; 43. Tripping reaction spring; 44. Tripping pull rod; 45. Tripping moving iron core.

[0032] Figure 1 The hollow arrow in the middle indicates the tripping and opening direction. Specific implementation mode

[0033] The following non-limiting embodiments are used to illustrate the present application.

[0034] Embodiment 1 Reference Figures 1 to 9 As shown, a locking device includes a conductive positioning copper block 1, a moving contact assembly 2, a locking assembly 3 and an overcurrent tripping device assembly 4, which is applicable to an electrical switch that requires reliable closing and locking and quick tripping and opening.

[0035] The moving contact assembly 2 includes a tripping spring 21, a moving contact rod 22 and a locking rod 23. The locking assembly 3 includes a locking shaft 31, a tripping dial 32 (tripping part), a locking base 33, a locking push block 34, a locking spring 35, a spring guide rod 36, a shaft return spring 37, a shaft return plate 38 (tripping part) and a shaft adjustment screw 39.

[0036] The locking end of the locking rod 23 is provided with a concave groove 24. One side groove surface of the concave groove 24 near the end forms a locking surface 25 for specific locking and clamping cooperation. The locking shaft 31 is rotatably arranged in the locking base 33 along the Y-axis. The locking shaft 31 is provided with a tripping part with a radial span, so that the tripping part can realize the rotation of the locking shaft 31 to change the angular position of the locking shaft 31.

[0037] The locking base 33 is provided with a guide hole 310 in the X direction. The locking end of the locking rod 23 extends into the guide hole 310, so that the locking rod 23 can move along the X direction in the guide hole 310 to realize locking and clamping or disengaging and unlocking. The locking shaft 31 is provided with a half shaft 311 located in the guide hole 310. The half shaft 311 is a slot on the locking shaft 31. The edge of the half shaft 311 away from the locking rod 23 forms a locking edge 312 for specific locking and clamping cooperation.

[0038] The concave groove 24 at the locking position is locked with the half shaft 311, and the concave groove 24 at the unlocking position is separated from the half shaft 311. That is, during the closing process of the moving contact assembly 2, the lock rod 23 moves in the guide hole along the positive direction of the X axis and contacts the half shaft 311 to achieve the lock setting, and the lock setting state is still maintained after the closing is completed. When opening, the release member is used to unlock the concave groove 24 and the half shaft 311, and the lock rod 23 moves in the guide hole along the reverse direction of the X axis.

[0039] The lock base 33 is made of non-metallic materials with insulation and flame retardant properties to avoid affecting the normal functions of other electrical components. The lock base 33 is fixedly installed to provide a foundation for the placement of other components.

[0040] A notch for installing a trip paddle 32 is provided on the lock shaft 31. The trip paddle 32 is radially arranged on the lock shaft 31. The trip paddle 32 is used as a form of tripping member for opening and tripping. By turning the trip paddle 32, the lock shaft 31 is driven to rotate, thereby unlocking the concave groove 24 and the half shaft 311.

[0041] The tripping paddles 32 are arranged at the two ends of the lock shaft 31, and the tripping and opening of the gate can be realized by individually turning any of the tripping paddles 32. Similarly, the tripping paddles 32 can also be individually installed at either end of the lock shaft 31.

[0042] The lock push block 34 is movably arranged in the guide hole 310 and arranged opposite to the half shaft 311. The top end of the spring guide rod 36 abuts against the back of the lock push block 34, and the bottom end of the spring guide rod 36 supports a lock spring 35. That is, the lock push block 34 can flexibly swing up and down in the lock base 33. The lock spring 35 acts on the spring guide rod 36, and the spring guide rod 36 provides elastic support for the lock push block 34. When the lock rod 23 moves to the half shaft 311, the lock push block 34 acts on the lock rod 23 to provide elastic thrust to ensure reliable buckling of the concave groove 24 and the half shaft 311.

[0043] The front of the lock push block 34 is an arc-shaped rod contact surface to optimize the contact friction between the lock rod 23 and the lock push block 34 to avoid jamming. The top of the spring guide rod 36 is provided with a lock ball surface 313, and the lock ball surface 313 is located in the hemispherical groove on the back of the lock push block 34. The lock push block 34 can swing flexibly with the ball joint, which can also reduce jamming and optimize the movement of the lock rod 23. The lock spring 35 is sleeved on the spring guide rod 36 to optimize the elastic support effect.

[0044] The shaft reset plate 38 is arranged on the locking shaft 31. Specifically, there is an installation plane for fixedly installing the shaft reset plate 38 in the middle of the locking shaft 31. The middle part of the shaft reset plate 38 is fixedly connected to the upper end of the locking shaft 31. The shaft reset spring 37 is placed below the left side of the shaft reset plate 38, and the shaft reset spring 37 is arranged on the locking base 33. Then, the shaft reset spring 37 acts on the shaft reset plate 38 to provide a moment for the locking shaft 31 to rotate from the unlocking position to the locking position.

[0045] The right end of the shaft reset plate 38 contacts the locking shaft adjusting screw 39. The shaft adjusting screw 39 is arranged on the locking base 33. The shaft adjusting screw 39 acts on the shaft reset plate 38 to calibrate the locking position of the locking shaft 31. That is, the position of the upper half shaft 311 on the locking shaft 31 can be adjusted by the locking shaft adjusting screw 39 to change the rotation angle of the locking shaft 31 to ensure that the inclination angle of the half shaft plane meets the requirements.

[0046] The bottom end of the moving contact rod 22 is swingably arranged on the conductive positioning copper block 1 to complete the closing and opening of the switch. The top end of the moving contact rod 22 is hinged to the contact end of the locking rod 23. A tripping spring 21 is arranged between the locking base 33 and the moving contact rod 22. During closing, the moving contact rod 22 moves towards the locking assembly 3 under the closing thrust, driving the locking rod 23 to move in the positive X-axis direction in the guiding hole. This process overcomes the elastic force of the tripping spring 21. During opening, under the elastic force of the tripping spring 21, the moving contact rod 22 and the locking rod 23 move in the opposite direction of the locking assembly 3 together, driving the locking rod 23 to move in the negative X-axis direction in the guiding hole.

[0047] There are two locking rods 23 arranged. The two locking rods 23 are respectively hinged on both sides of the moving contact rod 22. The locking ends of the two locking rods 23 respectively extend into the guiding holes 310 on both sides of the locking base 33. Through the symmetric arrangement on both sides, the stability and reliability of the locking effect are ensured.

[0048] The overcurrent tripping device assembly 4 acts on the shaft reset plate 38 as a tripping part. The shaft reset plate 38 is used as another form of the tripping part for opening tripping. When there is overcurrent, the shaft reset plate 38 is toggled to drive the locking shaft 31 to rotate, realizing the unlocking of the concave groove 24 and the half shaft 311.

[0049] The locking base 33 of the locking assembly 3 is fixedly installed above the overcurrent tripping device assembly 4 to realize the installation and fixation of the locking assembly 3. Similarly, when the overcurrent tripping device assembly 4 is not provided, the locking assembly 3 can be fixedly installed on other fixing parts.

[0050] The overcurrent tripping device assembly 4 includes an assembly main body, a tripping lever 41, a tripping guiding shaft 42, a tripping reaction spring 43, a tripping pull rod 44, and a tripping moving iron core 45. The conductive positioning copper block 1 passes through the overcurrent tripping device assembly 4, specifically through the assembly main body.

[0051] The tripping moving iron core 45 is arranged to move up and down on the component main body. The tripping moving iron core 45 is connected to the tripping lever 41. The shaft reset plate 38 is located below the tripping lever 41. When there is an overcurrent, the tripping moving iron core 45 descends due to the electromagnetic adsorption force, and presses down on the shaft reset plate 38 through the tripping lever 41, causing the shaft reset plate 38 to drive the locking shaft 31 to rotate, realizing the unlocking of the concave groove 24 and the half shaft 311. Thus, when there is an overcurrent, the tripping lever 41 acts on the shaft reset plate 38 to provide a moment for the locking shaft 31 to rotate from the locked position to the unlocked position.

[0052] The two sides of the tripping moving iron core 45 are fixedly connected with tripping pull rods 44. The tripping lever 41 is clamped on the tripping pull rods 44 through nuts, and the tripping lever 41 is located between the tripping pull rods 44 on both sides. The gap between the locking shaft reset plate 38 and the overcurrent tripping lever 41 can be adjusted through the nuts on both sides of the tripping lever.

[0053] The tripping moving iron core 45 is fixedly connected to the tripping guide shaft 42. The tripping guide shaft 42 is sleeved on the component main body in a lifting and sliding manner. A tripping reaction spring 43 is arranged between the component main body and the tripping moving iron core 45. When there is an overcurrent, the tripping moving iron core 45 needs to overcome the elastic force of the tripping reaction spring 43 to descend. When there is no overcurrent, under the action of the elastic force of the tripping reaction spring 43, the tripping moving iron core 45 automatically resets.

[0054] The locking component of this device forms a closing lock through the locking rod and the locking shaft, and the closing holding of the electrical switch is realized through the locking component. The electromagnetic force is used to pull the tripping lever to drive the locking shaft to rotate, and rapid tripping and opening can be achieved. The locking component is applicable to electrical switches that require rapid tripping and opening and have redundant opening functions, such as DC magnetic field circuit breakers. By controlling the external electromagnetic force, any side of the tripping flap can be pulled to independently complete tripping and opening, ensuring that the tripping forces of the two paths are redundant and backup each other.

[0055] Embodiment 2 Reference Figures 1 to 9 As shown, a usage method of a locking device adopts the locking device of Embodiment 1 and includes the following action modes.

[0056] Closing: The moving contact assembly 2 receives a closing thrust. The moving contact rod 22 moves towards the locking component 3 under the closing thrust, driving the locking end of the locking rod 23 to move into the guiding hole 310 (along the positive X-axis direction). After the locking rod 23 contacts the locking push block 34, the locking push block 34 pushes the locking rod 23 upward to push the concave groove 24 towards the half shaft 311. Subsequently, the locking edge 312 of the half shaft 311 drops into the concave groove 24 on the locking rod 23, realizing the locking fit between the concave groove 24 and the half shaft 311.

[0057] The locking surface 25 on the concave groove 24 should move to the right by a certain margin beyond the locking edge 312 on the locking shaft 31, and the closing thrust applied to the moving contact assembly should last for a period of time to ensure the reliability of the locking closing process.

[0058] Closing hold: When the closing electromagnet loses power and resets, the closing thrust applied to the moving contact assembly 2 disappears. The moving contact rod 22 and the locking rod 23 retreat under the action of the opening spring 21, causing the locking surface 25 to contact the locking edge 312, and the locking rod 23 to tightly engage with the locking shaft 31. The concave groove 24 and the half shaft 311 remain in the locked state.

[0059] Opening: When the release part receives the opening force, the locking shaft 31 rotates from the locked position to the unlocked position. The concave groove 24 disengages from the half shaft 311, and the locking rod 23 exits the guiding hole 310 (in the opposite direction of the X-axis) under the action of the opening spring 21. The moving contact rod 22 resets, completing the quick opening.

[0060] There are two types of release forms. One is that after the overcurrent release assembly 4 is subjected to the electromagnetic force of the short-circuit current, the electromagnetic adsorption force on its release moving iron core 45 decreases, and the release lever 41 is used to pull the shaft reset plate 38 to rotate counterclockwise around the Y-axis to form the release opening. The other is that after the release lever 32 is subjected to the pulling force of the opening electromagnet, it moves towards the release opening direction, driving the locking shaft 31 to rotate counterclockwise around the Y-axis to achieve the release opening.

[0061] The basic example of the present application and its various further selected examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, each selected example can be arbitrarily combined with any basic example and selected example.

[0062] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A latch device, comprising a moving contact assembly (2) and a latch assembly (3), characterized in that: The moving contact assembly (2) described above includes a locking lever (23). A concave groove (24) is provided at the locking end of the locking lever (23). The locking assembly (3) includes a locking shaft (31), a release member, and a locking base (33). The locking shaft (31) is rotatably arranged along the Y-axis in the locking base (33). A release member is provided on the locking shaft (31). A guiding hole (310) in the X-direction is provided on the locking base (33). A half shaft (311) located in the guiding hole (310) is provided on the locking shaft (31). The locking end of the locking lever (23) extends into the guiding hole (310). The concave groove (24) at the locking position is in locking cooperation with the half shaft (311), and the concave groove (24) at the unlocking position is disengaged from the half shaft (311).

2. The latch device according to claim 1, wherein: The locking assembly (3) described above further includes a release flap (32) as the release member. The release flap (32) is provided on the locking shaft (31).

3. The latch device according to claim 1 or 2, characterized in that: The locking assembly (3) described above further includes a locking push block (34), a locking spring (35), and a spring guiding rod (36). The locking push block (34) is movably arranged in the guiding hole (310) and is oppositely arranged with the half shaft (311). The top end of the spring guiding rod (36) abuts against the back surface of the locking push block (34). A locking spring (35) is provided at the bottom end of the spring guiding rod (36).

4. The buckle device according to claim 1 or 2, characterized in that: The locking assembly (3) described above further includes a shaft return spring (37) and a shaft return plate (38). The shaft return plate (38) is provided on the locking shaft (31). The shaft return spring (37) acts on the shaft return plate (38) to provide a moment for the locking shaft (31) to rotate from the unlocking position to the locking position.

5. The latch device according to claim 4, characterized in that: The locking assembly (3) described above further includes a shaft adjustment screw (39). The shaft adjustment screw (39) acts on the shaft return plate (38) to calibrate the locking position of the locking shaft (31).

6. The latch device according to claim 1, wherein: It further includes a conductive positioning copper block (1). The moving contact assembly (2) further includes a closing spring (21) and a moving contact rod (22). The bottom end of the moving contact rod (22) is swingably arranged on the conductive positioning copper block (1). The top end of the moving contact rod (22) is hinged to the contact end of the locking lever (23). A closing spring (21) is provided between the locking base (33) and the moving contact rod (22).

7. The latch device according to claim 4, characterized in that: It further includes an overcurrent release assembly (4). The overcurrent release assembly (4) acts on the shaft return plate (38) as the release member.

8. The latch device according to claim 7, characterized in that: The overcurrent release assembly (4) described above has the conductive positioning copper block (1) passing through it. The overcurrent release assembly (4) includes an assembly main body, a release lever (41), and a release moving iron core (45). The release moving iron core (45) is arranged to move up and down on the assembly main body. The release moving iron core (45) is connected to the release lever (41). When there is overcurrent, the release lever (41) acts on the shaft return plate (38) to provide a moment for the locking shaft (31) to rotate from the locking position to the unlocking position.

9. The latch device according to claim 8, characterized in that: The described overcurrent tripping device assembly (4) further includes a tripping guide shaft (42) and a tripping reaction spring (43). The tripping moving iron core (45) is connected to the tripping guide shaft (42). The tripping guide shaft (42) is sleeved on the assembly main body in a lifting and sliding manner. A tripping reaction spring (43) is provided between the assembly main body and the tripping moving iron core (45). The overcurrent tripping device assembly (4) further includes a tripping pull rod (44). Tripping pull rods (44) are connected to both sides of the tripping moving iron core (45). The tripping lever (41) is clamped on the tripping pull rods (44) by nuts. The tripping lever (41) is located between the tripping pull rods (44) on both sides.

10. A method of using a locking device, characterized in that: Adopt the latching device according to any one of claims 1 to 9; Closing: The moving contact assembly (2) receives a closing thrust. The latching end of the latching rod (23) moves into the guide hole (310) until the concave groove (24) is latched and cooperated with the half shaft (311); Closing hold: The closing thrust received by the moving contact assembly (2) disappears, and the concave groove (24) and the half shaft (311) remain in the latched state; Tripping: The tripping part receives a tripping acting force. The latching shaft (31) rotates from the latching position to the unlocking position. The concave groove (24) is disengaged from the half shaft (311), and the latching rod (23) withdraws from the guide hole (310).

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