A quick plug-in locking device for circuit breaker

Abstract

This invention discloses a quick-plug interlocking device for circuit breakers, comprising a locking plate assembly, a replacement handle, and an outer cover. The plate has a circular cavity matching a movable block, with a slotted hole at the end of the circular cavity. The movable block has a slotted countersunk hole. The locking tongue has a racetrack-shaped groove and a circular hole, with a spacer sleeve inside the racetrack-shaped groove and the circular hole. The thickness of the spacer sleeve is greater than the thickness of the locking tongue. The fixed block has symmetrical arc-shaped grooves. The movable block can drive the locking tongue to rotate along the arc-shaped groove of the fixed block. One end of the replacement handle has a slotted head matching the slotted countersunk hole of the movable block, and the other end has a threaded hole. The outer cover has female plug-in terminals, which can be plugged and unplugged into the male plug-in terminals inside the circuit breaker to achieve electrical circuit connection. This invention simplifies operation by allowing replacements to be performed under the pole, enabling uninterrupted power supply. On-site operators do not need to climb the pole, thus improving power quality and reducing the labor intensity of on-site personnel.

Description

Technical Field

[0001] This invention relates to the field of interlocking technology, and more specifically to a quick-plug interlocking device for circuit breakers. Background Technology

[0002] In the power distribution field, especially in 10kV overhead lines, since circuit breakers are fixed on poles, when maintaining or replacing vulnerable parts of the circuit breaker, operators often need to climb the pole to perform the work. In order to ensure personal safety, the power line needs to be de-energized before the operation can be carried out.

[0003] However, people's demands for power quality are constantly increasing, and power outage time and frequency are important indicators for evaluating power quality. Therefore, it is particularly important to design a quick-plug interlocking device for circuit breakers that allows for uninterrupted operation. To solve the above technical problems, this invention proposes a quick-plug interlocking device for circuit breakers. Summary of the Invention

[0004] The present invention proposes a quick-plug interlocking device for circuit breakers, which can solve the technical problem of inconvenience in replacing components of circuit breakers while they are energized.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A quick-release interlocking device for a circuit breaker includes a lock plate assembly, an outer cover, and a replacement handle. The lock plate assembly includes a panel, a movable block, a fixed block, a locking tongue, and a spacer sleeve. The panel has a circular cavity that matches the movable block. The end of the circular cavity has a slotted hole. A rectangular sealing gasket for sealing is also provided inside the panel. The movable block has a countersunk hole of the same size as the slot hole of the panel, and the countersunk hole of the movable block is placed in the circular cavity of the panel. The fixing block is provided with symmetrical arc-shaped grooves and is fixed together with the panel; The locking tongue is provided with a racetrack-shaped groove and a round hole. The racetrack-shaped groove and the round hole are equipped with a spacer sleeve. The thickness of the spacer sleeve is greater than the thickness of the locking tongue. The fixed block is provided with symmetrical arc-shaped grooves and is fixed together with the panel, and the movable block can drive the lock tongue to rotate along the arc-shaped grooves of the fixed block. The latch can retract or expand as the movable block rotates under the action of the spacer sleeve. When the latch retracts, it is in the unlocked state, and when the latch expands, it is in the locked state. The replacement handle has a groove head at one end that matches the groove countersunk hole of the movable block, and a threaded hole at the other end that allows for quick assembly or disassembly with the insulating operating rod. The outer casing is provided with female plug-in terminals, which can be plugged and unplugged into the male plug-in terminals inside the circuit breaker to achieve the connection of the electrical circuit.

[0006] Furthermore, a rectangular sealing gasket for sealing is also provided inside the panel; The movable block is provided with a countersunk hole of the same size as the slot hole of the panel and an O-ring mounting groove for sealing. The O-ring mounting groove is placed in the circular cavity of the panel.

[0007] Furthermore, the circular hole end of the latch is connected to the movable block, and the racetrack-shaped groove end of the latch is connected to the panel.

[0008] Furthermore, the movable block is also provided with a guide pin for positioning, so that the slotted head at one end of the replacement handle can be placed in the slotted countersunk hole of the movable block after passing through the slotted hole of the panel. The depth of the slotted countersunk hole of the movable block is greater than the thickness of the slotted head at one end of the replacement handle. Furthermore, when the latch is in the unlocked state, the grooved head of the replacement handle is perpendicular to the grooved hole at the end of the circular cavity of the panel. At this time, the grooved head of the replacement handle will be stuck between the panel and the movable block, so that the entire device can be removed. Furthermore, when the latch is in the locked state, the groove head of the replacement handle is parallel to the groove hole at the end of the circular cavity of the panel, and the replacement handle can be freely removed independently at this time. Furthermore, the outer cover is also provided with a guide sleeve, which, together with the guide pin inside the circuit breaker, plays a positioning role, ensuring that the female plug-in terminal is properly inserted into the male plug-in terminal inside the circuit breaker.

[0009] As can be seen from the above technical solution, the present invention provides a quick-plug interlocking device for circuit breakers, which can place the vulnerable parts or parameter maintenance units of the circuit breaker in the outer cover of the quick-plug interlocking device. When replacing, the operator can first connect and fasten the replacement handle to the insulating operating rod through the internal thread of the replacement handle. Then, under the rod, the slotted head at the upper end of the replacement handle is passed through the slotted hole of the locking plate assembly panel and placed in the slotted countersunk hole of the movable block through the insulating operating rod. Then, rotating the insulating operating rod counterclockwise will drive the movable block to rotate counterclockwise. The movable block will then drive the locking tongue to rotate along the arc-shaped sliding groove of the fixed block. After the locking tongue retracts, the interlocking device is unlocked. At this time, the slotted head at the upper end of the replacement handle is also stuck between the panel and the movable block. The interlocking device can be completely removed by pulling down the operating rod.

[0010] Conversely, after the replacement is completed, the locking device is placed in the circuit breaker installation position by using the insulating operating rod. After rotating the operating rod clockwise, the replacement handle can be rotated clockwise, causing the movable block to rotate clockwise and thus causing the locking tongue to unfold outward. The locking device is then in the locked state. At this time, the slotted head at the top of the replacement handle is parallel to the slotted hole on the panel. Pulling down the insulating operating rod can remove the replacement handle.

[0011] Since the replacement is carried out under the pole, the operation is simple and can be carried out without power interruption; on-site operators do not need to climb the pole, which improves the quality of power supply and reduces the labor intensity of on-site personnel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall assembly of an embodiment of the present invention; Figure 2 This is a schematic diagram of the locking plate assembly according to an embodiment of the present invention; Figure 3 This is an exploded view of the locking plate assembly according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the active block structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the replaceable handle structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating an installation example of the present invention.

[0013] The diagram is labeled as follows: 1. Locking plate assembly; 2. Outer cover; 21. Female plug-in terminal; 22. Guide sleeve; 3. Replacement handle; 31. Slotted head; 32. Threaded hole; 33. Guide hole; 11. Panel; 111. Slotted hole; 112. Circular cavity; 113. Screw sleeve; 12. Rectangular sealing gasket; 13. Locking tongue; 131. Racetrack-shaped slide; 132. Circular hole; 14. Fixing block; 141. Arc-shaped slide; 15. Movable block; 151. Guide pin; 152. Slotted countersunk hole; 153. O-ring mounting groove; 16. Spacer sleeve; 17. Screw; 4. Circuit breaker housing; 41. Guide pin; 42. Male plug-in terminal; 5. Insulated operating rod. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0015] like Figure 1As shown, the quick-plug interlocking device for circuit breakers described in this embodiment includes a locking plate assembly 1, an outer cover 2, and a replacement handle 3. The locking plate assembly 1 includes a panel 11, a movable block 15, a fixed block 14, a locking tongue 13, and a spacer sleeve 16. The panel 11 is provided with a circular cavity 112 that matches the movable block 15. The end of the circular cavity 112 is provided with a slot-shaped hole 111. A rectangular sealing gasket 12 for sealing is also provided inside the panel 11. The movable block 15 is provided with a countersunk hole 152 of the same size as the slot hole 111 of the panel and an O-ring mounting groove 153 for sealing. The countersunk hole 152 and the O-ring mounting groove 153 of the movable block 15 are placed in the circular cavity 112 of the panel 11. The movable block 15 is also provided with a guide pin 151 for positioning, so that the grooved head at one end of the replacement handle 3 can be placed in the grooved countersunk hole 152 of the movable block 15 after passing through the grooved hole 111 of the panel 11. The depth of the grooved countersunk hole 152 of the movable block 15 is greater than the thickness of the grooved head 31 at one end of the replacement handle 3. The fixed block 14 is provided with symmetrical arc-shaped slide grooves 141 and can be fixed to the panel 11 by screws, and the movable block 15 can drive the locking tongue 13 to rotate along the arc-shaped slide grooves 141 of the fixed block 14. The locking tongue 13 is provided with a racetrack-shaped groove 131 and a round hole 132. The racetrack-shaped groove 131 and the round hole are fitted with a spacer sleeve 16. The thickness of the spacer sleeve 16 is greater than the thickness of the locking tongue 13. The circular hole end of the latch 13 is connected to the movable block 15 by screws, and the racetrack-shaped slide groove 131 end of the latch 13 is connected to the panel 11 by screws. The latch 13 can retract or expand as the movable block 15 rotates under the action of the spacer sleeve 16. When the latch 13 retracts, it is in the unlocked state, and when the latch 13 expands, it is in the locked state. When the locking tongue 13 is in the unlocked state, the groove head 31 of the replacement handle 3 is perpendicular to the groove hole 111 at the end of the circular cavity 112 of the panel 11. At this time, the groove head of the replacement handle will be stuck between the panel and the movable block, so that the entire device can be removed. When the latch 13 is in the locked state, the groove head of the replacement handle 3 is parallel to the groove hole 111 at the end of the circular cavity 112 of the panel, and the replacement handle 3 can be freely removed independently at this time. The replacement handle 3 has a groove head 31 at one end that matches the groove countersunk hole of the movable block 15, and a threaded hole at the other end that can be quickly assembled or disassembled with the insulating operating rod. The outer cover 2 is provided with a female plug-in terminal 21 and a guide sleeve 22. The female plug-in terminal 21 can be plugged and unplugged into the male plug-in terminal 42 inside the circuit breaker to realize the connection of the electrical circuit. The guide sleeve 22 and the guide pin 41 inside the circuit breaker work together to position the female plug-in terminal and the male plug-in terminal 42 inside the circuit breaker.

[0016] When in use, first place the replaceable components or protection unit of the circuit breaker in the outer cover 2, connect the electrical circuit of the component to be replaced to the female plug-in terminal 21, and then fix the outer cover 2 to the end face of the locking plate assembly 1 with the rectangular sealing gasket 12 by screws. The locking plate assembly 1 consists of a panel 11, a rectangular sealing gasket 12, a movable block 15, a fixed block 14, a locking tongue 13, and a spacer sleeve 16. In use, first, the sealing ring is placed in the O-ring mounting groove 153 of the movable block 15. Then, the movable block 15 with one end of the slotted countersunk hole 152 facing down is installed into the circular cavity 112 of the panel 11. Next, the fixed block 14 is fixed to the threaded sleeve 113 of the panel 11 with screws 17. After the fixed plate 11 is fixed, it can prevent the movable block 15 from coming out of the circular cavity 112 of the panel 11. Then, the spacer sleeve 16 is placed in the circular holes 132 and the racetrack-shaped slide groove 131 of the two locking tongues 13 respectively. Then, the circular holes 132 of the locking tongue 13 are aligned with the arc-shaped slide groove 141 of the fixed block 14 and fixed to the movable block 15 with screws 17. The end of the racetrack-shaped slide groove 131 of the locking tongue 13 is fixed to the threaded sleeve 113 of the panel 11 with screws 17. Because the height of the spacer sleeve 16 is greater than the thickness of the latch 13, it can be ensured that after the bolt 17 is fixed, there is a certain gap between the latch 13 and the threaded sleeve 113 of the panel 11, and between the latch 13 and the fixing block 14, so that the latch 13 can move freely with the rotation of the movable block 15.

[0017] The movable block 15 is also provided with a guide pin 151. When the replacement handle 3 is used for operation, the replacement handle 3 is positioned by inserting the guide hole 33 of the replacement handle 3 into the guide pin 151 of the movable block 15, which makes it convenient for the operator to operate under the pole.

[0018] One end of the replacement handle 3 is provided with a grooved head 31, and the other end is provided with a threaded hole 32. The grooved head 31 can be placed in the grooved countersunk hole 152 of the movable block 15, and the threaded hole 32 can be used to connect an external insulating operating rod 5. During operation, the replacement handle 3 is rotated counterclockwise by rotating the insulating operating rod 5. At this time, under the action of the grooved head 31 of the replacement handle 3, the movable block 15 can be rotated counterclockwise. The movable block 15 then drives the end of the round hole 132 of the locking tongue 13 to slide clockwise along the arc-shaped slide groove 141 of the fixed block 14. As the locking tongue 13 slides clockwise, the other end of the locking tongue 13 retracts inward under the action of its own racetrack-shaped slide groove 131. At this time, the head of the locking tongue 13 is disengaged from the circuit breaker housing 4, and the locking device is in the unlocked state. When the interlocking device is in the unlocked state, the slotted head 31 of the replacement handle 3 is perpendicular to the slotted hole 111 of the panel 11. At this time, the slotted head 31 of the replacement handle 3 is stuck between the movable block 15 and the circular cavity 112 of the panel 11. When the insulating operating rod 5 is pulled down, the entire interlocking device can be moved out of the circuit breaker housing 4 under the action of the replacement handle 3.

[0019] During installation, first operate the replacement handle 3 to unlock the locking device. Then, use the insulating operating rod 5 to place the locking device inside the circuit breaker housing 4. Next, rotate the insulating operating rod 5 clockwise to rotate the replacement handle 3 and the movable block 15 clockwise. The movable block 15 then drives the end of the locking tongue 13 with the round hole 132 to slide counterclockwise along the arc-shaped slide groove 141 of the fixed block 14. As the locking tongue 13 slides counterclockwise, the other end of the locking tongue 13 unfolds outward under the action of its own racetrack-shaped slide groove 131. At this time, the head of the locking tongue 13 is tangent to the circuit breaker housing 4, and the locking device is in the locked state.

[0020] In addition, when the locking device moves upward within the circuit breaker housing 4, the guide sleeve 22 of the locking device contacts the guide pin 41 of the circuit breaker housing 4 first, preventing the locking device from shifting and ensuring reliable connection between the female plug-in terminal 21 of the locking device and the male plug-in terminal 42 within the circuit breaker housing 4.

[0021] When the interlocking device is in the interlocked state, the slotted head 31 of the replacement handle 3 is parallel to the slotted hole 111 of the panel 11. When the insulating operating rod 5 is pulled down, the slotted head 31 of the replacement handle 3 can be dislodged from the slotted countersunk hole 152 of the movable block 15, leaving the interlocking device inside the circuit breaker housing 4, thus completing the replacement work.

[0022] When the interlocking device is in the interlocked state, the rectangular sealing gasket 12 on the panel 11 can seal the upper end face of the panel 11 and the lower end face of the circuit breaker housing 4 to prevent dust and rainwater from entering.

[0023] In summary, the quick-release interlocking device for circuit breakers provided by this invention allows vulnerable parts or parameter maintenance units of the circuit breaker to be placed inside the outer casing of the quick-release interlocking device. During replacement, the operator can first connect and secure the replacement handle to the insulating operating rod via the internal thread of the replacement handle. Then, through the insulating operating rod, the slotted head at the upper end of the replacement handle is passed through the slotted hole in the locking plate assembly panel and placed in the slotted countersunk hole of the movable block. Rotating the insulating operating rod counterclockwise will cause the movable block to rotate counterclockwise, which in turn causes the locking tongue to rotate along the arc-shaped sliding groove of the movable block. After the locking tongue retracts, the interlocking device is unlocked. At this time, the slotted head at the upper end of the replacement handle is also stuck between the panel and the movable block. The interlocking device can be completely removed by pulling down the operating rod.

[0024] Conversely, after the replacement is completed, the locking device is placed in the circuit breaker installation position by using the insulating operating rod. After rotating the operating rod clockwise, the replacement handle can be rotated clockwise, causing the movable block to rotate clockwise and thus causing the locking tongue to unfold outward. The locking device is then in the locked state. At this time, the slotted head at the top of the replacement handle is parallel to the slotted hole on the panel. Pulling down the insulating operating rod can remove the replacement handle.

[0025] Since the replacement is carried out under the pole, the operation is simple and can be carried out without power interruption; on-site operators do not need to climb the pole, which improves the quality of power supply and reduces the labor intensity of on-site personnel.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick-release interlocking device for a circuit breaker, comprising a locking plate assembly, a replacement handle, and an outer cover, characterized in that, The lock plate assembly includes a panel, a movable block, a latch, a spacer sleeve, and a fixing block. The panel has a circular cavity that matches the movable block. The end of the circular cavity has a slotted hole. The movable block has a slotted countersunk hole of the same size as the slotted hole. The slotted countersunk hole of the movable block is placed in the circular cavity of the panel. The latch is provided with a racetrack-shaped groove and a circular hole. The racetrack-shaped groove and the circular hole are fitted with a spacer sleeve. The thickness of the spacer sleeve is greater than the thickness of the latch. The fixed block is provided with symmetrical arc-shaped grooves and is fixed together with the panel, and the movable block can drive the lock tongue to rotate along the arc-shaped grooves of the fixed block. The latch can retract or expand as the movable block rotates under the action of the spacer sleeve. When the latch retracts, it is in the unlocked state, and when the latch expands, it is in the locked state. The replacement handle has a groove head at one end that matches the groove countersunk hole of the movable block, and a threaded hole at the other end. The outer casing is provided with female plug-in terminals, which can be plugged and unplugged into the male plug-in terminals inside the circuit breaker to realize the connection of the electrical circuit; When the latch is in the unlocked state, the grooved head of the replacement handle is perpendicular to the grooved hole at the end of the circular cavity of the panel. At this time, the grooved head of the replacement handle will be stuck between the panel and the movable block, so that the entire device can be removed. When the latch is in the locked state, the groove head of the replacement handle is parallel to the groove hole at the end of the circular cavity of the panel, and the replacement handle can be freely removed independently.

2. The quick-plug interlocking device for circuit breakers according to claim 1, characterized in that: The movable block is also provided with a guide pin for positioning, so that the slotted head at one end of the replacement handle can be placed in the slotted countersunk hole of the movable block after passing through the slotted hole of the panel. The depth of the slotted countersunk hole of the movable block is greater than the thickness of the slotted head at one end of the replacement handle.

3. The quick-plug interlocking device for circuit breakers according to claim 2, characterized in that: The circular hole end of the latch is connected to the movable block, and the racetrack-shaped groove end of the latch is connected to the panel.

4. The quick-plug interlocking device for circuit breakers according to claim 3, characterized in that: The circular hole end of the latch is connected to the movable block by a screw, and the racetrack-shaped groove end of the latch is connected to the panel by a screw.

5. The quick-plug interlocking device for circuit breakers according to claim 1, characterized in that: The fixing block is fixed to the panel by screws.

6. The quick-plug interlocking device for circuit breakers according to claim 1, characterized in that: The panel is also provided with a rectangular sealing gasket for sealing. The movable block is provided with an O-ring mounting groove for sealing, which is the same size as the slot-shaped hole. The O-ring mounting groove is placed in the circular cavity of the panel.

7. The quick-plug interlocking device for circuit breakers according to claim 1, characterized in that: The outer cover is also provided with a guide sleeve, which, together with the guide pin inside the circuit breaker, plays a positioning role, ensuring that the female plug-in terminal is properly inserted into the male plug-in terminal inside the circuit breaker.

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