A new type of fast grounding mechanism and closing control method

Abstract

The present invention belongs to the technical field of fast grounding switches, and specifically relates to a new type of fast grounding mechanism and a closing control method, which are applied to HGIS / GIS combined electrical products. The new type of fast grounding mechanism, based on the motor worm gear drive, redesigns the closing control structure, uses a new type of closing holding latch structure, and adds worm gear rotation buffer positioning and time relay coordinated control, which can ensure accurate closing energy storage, precise closing operation, simple operation, wide application of the mechanism, can accurately complete the closing of the fast grounding switch, and has a wide range of application.

Description

Technical Field

[0001] The invention belongs to the technical field of fast grounding switches, and in particular relates to a novel fast grounding mechanism and a closing control method, which are applied to HGIS / GIS combined electrical products. Background Art

[0002] As we all know, all newly designed high-voltage switches need to pass type tests that comply with national and international industry standards, and so do fast-earthing switches. In the fast-earthing closing test, in order to obtain accurate pre-breakdown time, I often need to accurately control the fast-earthing mechanism so that the error between the two closing times is controlled within 1ms. However, the existing structure of the fast-earthing mechanism can only be controlled by the operating motor for opening and closing, which has large operating errors and low precision and cannot meet the requirements of the type test.

[0003] Therefore, there is an urgent need for a new type of rapid grounding mechanism that can meet the various requirements of the national standard and IEC standard for type testing of rapid grounding switches, and fill the gap in the domestic precise closing pre-energy storage rapid grounding mechanism. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a new type of rapid grounding structure and closing control method. On the basis of the motor worm gear drive, the closing control structure is redesigned, and a new type of closing holding latch structure is used, and the worm gear rotation buffer positioning and time relay coordinated control are added to ensure accurate closing energy storage and precise closing operation. The operation is simple and the mechanism is widely used. The closing of the rapid grounding switch can be completed accurately, and the mechanism has a wide range of applications.

[0005] The present invention is achieved through the following technical solutions:

[0006] A novel rapid grounding mechanism comprises: an energy storage control device and a closing control device;

[0007] The energy storage control device comprises: a worm wheel, a worm, a motion shaft pin, and a closing and opening spring; the worm wheel and the worm are drivingly connected, the outer edge of the worm wheel is provided with a groove for accommodating the motion shaft pin, and the motion shaft pin is connected to the closing and opening spring;

[0008] The closing control device includes: a retaining latch for limiting and fixing the moving shaft pin at a critical position on the surface of the worm gear, a rotating wheel installed on the retaining latch, a closing latch connected to the rotating wheel and used to fix the retaining latch, a spring installed under the closing latch for supporting the closing latch, a fixing pin for limiting the closing latch, a retaining latch spring for pulling the retaining latch, and a closing coil that controls the firing of the closing latch through an electromagnet.

[0009] Furthermore, the worm gear drives the moving shaft pin to rotate, and when the moving shaft pin rotates to a critical position, the closing and opening spring applies a thrust to the moving shaft pin to move downward along the groove on the outer edge of the worm gear, and under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin is stuck in the critical position to prevent the moving shaft pin from closing; wherein, the critical position is the limit position in the process of the moving shaft pin compressing the closing and opening spring, and when this position is exceeded, the closing and opening spring will be released, and at the same time, the critical position is also the middle position of the worm gear surface, that is, the tangent point of the line connecting the turbine center and the fixed center of the closing and opening spring and the turbine surface.

[0010] When the moving shaft pin rotates to the critical position, the retaining latch in the closing control device can limit the movement of the moving shaft pin; when the closing coil receives the closing electrical signal and is triggered, the retaining latch can release the limit on the moving shaft pin, so that the moving shaft pin moves downward under the action of the closing and opening spring and hits the crank arm, driving the output shaft to rotate, completing the closing action, and ensuring the accuracy of the closing of the rapid grounding mechanism.

[0011] Furthermore, a baffle and a travel switch are arranged on the worm gear, and a power supply is controlled by a time relay to drive the worm gear to rotate;

[0012] When the moving shaft pin rotates to a critical position, the blocking piece triggers the travel switch to cut off the power supply.

[0013] Furthermore, the critical position is the limit position in the process of the moving shaft pin compressing the closing and opening spring; at the same time, the critical position is also the middle position of the worm gear surface. After passing the critical position, it will move and release rapidly under the action of the elastic force of the spring.

[0014] Furthermore, in the closing control device, one end of the spring is fixed to the mechanism frame through a spring fixing block, and the other end is fixed to the bottom of the closing latch; one end of the retaining latch spring is installed on the mechanism frame, and the other end is installed on the retaining latch; the retaining latch and the fixing pin are both installed and fixed on the mechanism frame. The mechanism frame is the structural frame of the new rapid grounding mechanism.

[0015] Furthermore, the novel quick grounding mechanism also includes a worm gear limiting device; when the moving shaft pin rotates to a critical position, the pin head of the worm gear limiting device pushes into the countersunk hole on the worm gear to limit the worm gear and prevent the worm gear from excessive movement.

[0016] A closing control method of a novel rapid grounding mechanism, using the novel rapid grounding mechanism, the method comprising:

[0017] The power supply is controlled by the time relay to drive the worm gear to rotate, and the worm gear drives the moving shaft pin to rotate. When the moving shaft pin rotates to the critical position, the baffle triggers the travel switch to cut off the power supply, and the closing and opening spring applies a thrust to the moving shaft pin to move downward along the groove on the outer edge of the worm gear. Under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin is stuck in the critical position to prevent the moving shaft pin from closing; and the pin head of the worm gear limiting device is pushed into the countersunk hole on the worm gear to limit the worm gear;

[0018] The control system sends out an electrical signal for closing the mechanism. The closing coil moves instantly after receiving the electrical signal for closing the mechanism, triggering the closing latch. The closing latch presses against one side of the rotating wheel and moves downward along the surface of the rotating wheel, losing the limiting effect on the holding latch. The holding latch rotates under the closing pressure of the moving shaft pin and the action of the holding latch spring, losing the limiting effect on the moving shaft pin. The moving shaft pin moves downward under the action of the closing and opening spring and hits the crank arm, driving the output shaft to rotate, completing the closing action.

[0019] Beneficial technical effects of the present invention:

[0020] The novel fast grounding mechanism provided by the present invention can accurately realize the precise closing of the switch, and the error is controlled within 1ms;

[0021] The novel rapid grounding mechanism provided by the present invention redesigns the closing control structure on the basis of the motor worm gear drive, uses a novel closing holding latch structure, and combines the worm gear rotation buffer positioning with the time relay for control, thereby ensuring accurate closing energy storage and precise closing operation. The operation is simple and the mechanism is widely used. The closing of the rapid grounding switch can be completed accurately, and the application range of the mechanism is wide.

[0022] The novel quick grounding mechanism provided by the present invention adopts a time relay to accurately set the energy storage time of the mechanism, and uses a travel switch to perform limit power-off control, which can meet the precise control of the energy storage of the mechanism;

[0023] The novel quick grounding mechanism provided by the present invention adopts a worm gear limiting device to perform mechanical positioning and buffering of the worm gear, which can effectively locate the movement position of the worm gear and prevent the overtravel of the worm gear from affecting the mechanism.

[0024] The closing holding latch structure adopted by the novel rapid grounding mechanism provided by the present invention can effectively hold the movement of the spring shaft pin, and through the electromagnet control firing, can accurately ensure the closing accuracy of the rapid grounding mechanism;

[0025] The novel quick grounding mechanism provided by the present invention has the whole closing process of the mechanism being electrically precisely controlled, and the operation is simple and accurate. It can close the circuit precisely through electrical control, thus filling the technical gap. It can be promoted to major high-voltage test laboratories and mechanism manufacturers, and improve the level of industry testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1-2 This is a schematic diagram of the structure of an energy storage control device in a rapid grounding mechanism according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the rapid grounding mechanism according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a quick grounding mechanism and before closing of an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of a quick grounding mechanism and a circuit breaker after closing according to an embodiment of the present invention;

[0030] Figure numerals: 1. Worm; 2. Worm wheel; 3. Moving shaft pin; 4. Closing and opening spring; 5. Baffle; 6. Travel switch; 7. Worm wheel limit device; 8. Closing device; 9. Retaining latch; 10. Rotating wheel; 11. Spring fixing block; 12. Spring; 13. Closing coil; 14. Closing latch; 15. Fixing pin; 16. Retaining latch spring; 17. Crank arm. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and 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.

[0032] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0033] like Figure 1-5 As shown, an embodiment of the present invention provides a novel rapid grounding mechanism, including: an energy storage control device and a closing control device;

[0034] The energy storage control device comprises: a worm wheel 2, a worm 1, a motion shaft pin 3, and a closing and opening spring 4; the worm wheel 2 is drivingly connected to the worm 1, the outer edge of the worm wheel 2 is provided with a groove for accommodating the motion shaft pin 3, and the motion shaft pin 3 is connected to the closing and opening spring 4; preferably, the motion shaft pin 3 is installed at the top end of the closing and opening spring 4;

[0035] The closing control device includes: a retaining latch 9 for limiting and fixing the moving shaft pin 3 at a critical position on the surface of the worm gear 2, a rotating wheel 10 installed on the retaining latch 9, a closing latch 14 connected to the rotating wheel 10 and used to fix the retaining latch 9, a spring 12 installed under the closing latch 14 for supporting the closing latch 14, a fixing pin 15 for limiting the closing latch 14, a retaining latch spring 16 for pulling the retaining latch 9, and a closing coil 13 for triggering the closing latch 14 through an electromagnet.

[0036] In this embodiment, a baffle 5 and a travel switch 6 are provided on the worm wheel 2, and the power supply is controlled by a time relay to drive the worm wheel 2 to rotate; when the moving shaft pin rotates to a critical position, the baffle 5 triggers the travel switch 6 to cut off the power supply. In this embodiment, the critical position is the limit position in the process of the moving shaft pin compressing the closing and opening spring. When this position is exceeded, the closing and opening spring will be released. At the same time, the critical position is also the middle position of the worm wheel surface, which is the tangent point position of the line connecting the turbine center and the fixed center of the closing and opening spring and the turbine surface.

[0037] In this embodiment, the worm wheel 2 drives the moving shaft pin 3 to rotate. When the moving shaft pin 3 rotates to a critical position, the closing and opening spring applies a thrust to the moving shaft pin to move downward along the groove on the outer edge of the worm wheel 2. Under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin 3 is stuck in the critical position to prevent the moving shaft pin from closing.

[0038] When the moving shaft pin 3 rotates to the critical position, the retaining latch 9 in the closing control device can limit the movement of the moving shaft pin 3; when the closing coil 13 is fired after receiving the closing electrical signal, the retaining latch 9 can release the limit on the moving shaft pin 3, so that the moving shaft pin 3 moves downward under the action of the closing and opening spring and hits the crank arm 17, driving the output shaft to rotate, completing the closing action, and ensuring the accuracy of the closing of the rapid grounding mechanism.

[0039] In this embodiment, in the closing control device, one end of the spring 13 is fixed to the mechanism frame through the spring fixing block 11, and the other end is fixed to the bottom of the closing latch 14; one end of the retaining latch spring 16 is installed on the mechanism frame, and the other end is installed on the retaining latch 9; the retaining latch 9 and the fixing pin 15 are both installed and fixed on the mechanism frame. The mechanism frame refers to the structural frame of the new rapid grounding mechanism.

[0040] In this embodiment, the novel quick grounding mechanism also includes a worm gear limiting device; when the moving shaft pin rotates to a critical position, the pin head of the worm gear limiting device pushes into the countersunk hole on the worm gear 2 to limit the worm gear 2 and prevent the worm gear from excessive movement.

[0041] The present invention further provides an embodiment of a closing control method of a novel rapid grounding mechanism, using the novel rapid grounding mechanism described in the above embodiment, the method comprising:

[0042] The power supply is controlled by the time relay to drive the worm gear 2 to rotate. Since the moving shaft pin 3 is installed at the top of the closing and opening spring and placed in the turbine groove, the moving shaft pin 3 connects the turbine 2 with the closing and opening spring 4 for movement; when the turbine 2 rotates, the worm gear 2 drives the moving shaft pin 3 in the groove to rotate with the worm gear, and compresses the closing and opening spring 4 to store energy; when the moving shaft pin 3 rotates to the critical position, the closing and opening spring 4 is compressed to the maximum, the baffle 5 triggers the travel switch 6 to cut off the power supply, and the closing and opening spring applies a thrust to the moving shaft pin to move downward along the groove on the outer edge of the worm gear 2. Under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin 3 is stuck in the critical position to prevent the moving shaft pin 3 from closing; and the pin head of the worm gear limiting device is pushed into the countersunk hole on the worm gear 2 to limit the worm gear 2 to prevent the worm gear from continuing to rotate under the inertia of the motor and causing excessive movement. Preferably, the worm gear limiting device is installed on the mechanism frame of the quick grounding mechanism.

[0043] The control system sends out a mechanism closing electrical signal. The closing coil 13 moves instantly after receiving the mechanism closing electrical signal, triggering the closing latch 14. The closing latch 14 presses against one side of the rotating wheel and moves downward along the surface of the rotating wheel, losing the limit on the retaining latch 9. The retaining latch 9 rotates under the closing pressure of the moving shaft pin 3 and the action of the retaining latch spring 16, losing the limit on the moving shaft pin 3. The moving shaft pin 3 moves downward under the action of the closing and opening spring and hits the crank arm 17, driving the output shaft to rotate and completing the closing action. The closing control device provided by the embodiment of the present invention can smoothly transmit and reduce the operating work of the coil, and the operation is simple and effective, the quality is reliable, and the control is accurate.

Claims

1. A new type of rapid grounding mechanism, characterized in that: include: Energy storage control device and closing control device; The energy storage control device comprises: a worm wheel (2), a worm (1), a moving shaft pin (3), and a closing and opening spring (4); the worm wheel (2) and the worm (1) are drivingly connected, the outer edge of the worm wheel (2) is provided with a groove for accommodating the moving shaft pin (3), and the moving shaft pin (3) and the closing and opening spring (4) are connected; The closing control device comprises: a retaining latch (9) for limiting and fixing the moving shaft pin (3) at a critical position on the surface of the worm gear (2), a rotating wheel (10) installed on the retaining latch (9), a closing latch (14) connected to the rotating wheel (10) and used to fix the retaining latch (9), a spring (12) installed below the closing latch (14) for supporting the closing latch (14), a fixing pin (15) for limiting the closing latch (14), a retaining latch spring (16) for pulling the retaining latch (9), and a closing coil (13) for triggering the closing latch (14) through an electromagnet; The worm wheel (2) drives the moving shaft pin (3) to rotate. When the moving shaft pin (3) rotates to a critical position, the closing spring applies a thrust force to the moving shaft pin to move downward along the groove on the outer edge of the worm wheel (2). Under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin (3) is stuck at the critical position to prevent the moving shaft pin from closing. When the moving shaft pin (3) rotates to a critical position, the retaining latch (9) in the closing control device can limit the movement of the moving shaft pin (3); when the closing coil (13) receives a closing electrical signal and is triggered, the retaining latch (9) can release the limit on the moving shaft pin (3), so that the moving shaft pin (3) moves downward under the action of the closing and opening spring and hits the crank arm (17), thereby driving the output shaft to rotate and completing the closing action, thereby ensuring the accuracy of the closing of the quick grounding mechanism; In the closing control device, one end of the spring (12) is fixed to the mechanism frame through a spring fixing block (11), and the other end is fixed to the bottom of the closing latch (14); one end of the retaining latch spring (16) is installed on the mechanism frame, and the other end is installed on the retaining latch (9); the retaining latch (9) and the fixing pin (15) are both installed and fixed on the mechanism frame; The rapid grounding mechanism can accurately realize the precise closing of the switch, and the error is controlled within 1ms.

2. According to claim 1, a novel rapid grounding mechanism is characterized in that: A baffle (5) and a travel switch (6) are arranged on the worm wheel (2), and a power supply is controlled by a time relay to drive the worm wheel (2) to rotate; When the moving shaft pin rotates to a critical position, the blocking piece (5) triggers the travel switch (6) to cut off the power supply.

3. According to claim 1, a novel rapid grounding mechanism is characterized in that: The novel quick grounding mechanism also includes a worm gear limiting device; when the moving shaft pin rotates to a critical position, the pin head of the worm gear limiting device pushes into the countersunk hole on the worm gear (2), limiting the worm gear (2) and preventing the worm gear from moving excessively.

4. A closing control method of a novel rapid grounding mechanism, using the novel rapid grounding mechanism according to any one of claims 1 to 3, characterized in that: The method comprises: The power supply is controlled by a time relay to drive the worm wheel (2) to rotate, and the worm wheel (2) drives the moving shaft pin (3) to rotate. When the moving shaft pin (3) rotates to a critical position, the baffle (5) triggers the travel switch (6) to cut off the power supply, and the closing and opening spring applies a thrust to the moving shaft pin to move downward along the groove on the outer edge of the worm wheel (2). Under the limiting action of the closing control device on the moving shaft pin, the moving shaft pin (3) is stuck in the critical position to prevent the moving shaft pin (3) from closing; and the pin head of the worm wheel limiting device is pushed into the countersunk hole on the worm wheel (2) to limit the worm wheel (2); The control system sends out a mechanism closing electrical signal, and the closing coil (13) moves instantly after receiving the mechanism closing electrical signal, triggering the closing latch (14), and the closing latch (14) presses against one side of the rotating wheel and moves downward along the surface of the rotating wheel, losing the limiting effect on the retaining latch (9); the retaining latch (9) rotates under the closing pressure of the moving shaft pin (3) and the action of the retaining latch spring (16), and loses the limiting effect on the moving shaft pin (3); the moving shaft pin (3) moves downward under the action of the closing and opening spring and hits the crank arm (17), driving the output shaft to rotate, and completing the closing action.

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