Interlocking structure of circuit breaker and three-position switch and switch cabinet

Abstract

The utility model relates to the field of interlocking, locking or locking mechanisms, in particular to an interlocking structure of a circuit breaker and a three-position switch and a switch cabinet. The interlocking structure of the circuit breaker and the three-position switch comprises a three-position switch locking structure, a circuit breaker mechanism, a three-position mechanism and an operation panel, a mechanism box of the circuit breaker mechanism is provided with a rotating shaft, and the rotating shaft is fixedly connected with a three-position unlocking connecting rod mechanism and a baffle plate. The baffle plate can block and avoid a closing release on the circuit breaker mechanism under the action of the rotating shaft, the three-station unlocking connecting rod mechanism is connected with a three-station mechanism unlocking plate, the three-station mechanism unlocking plate is fixedly provided with a three-station mechanism unlocking handle, and the three-station mechanism unlocking plate is a push-pull plate connected to the operation panel. The interlocking structure of the circuit breaker and the three-position switch is simple in structure and easy and convenient to operate, and not only can lock the isolating switch, but also can lock the circuit breaker.

Description

Technical Field

[0001] The utility model relates to the field of interlocking, locking or closing mechanisms, in particular to an interlocking structure of a circuit breaker and a three-position switch and a switch cabinet. Background Art

[0002] Circuit breakers and three-position switches are two commonly used switching devices in power transmission and distribution lines. Circuit breakers are mainly used for breaking and conducting large currents, while three-position switches are protective switches whose main function is to protect the safety of operators. When used, the two are used in conjunction with each other and play a complementary role.

[0003] In engineering applications, switch products require five-protection features between the three-position mechanism and the circuit breaker mechanism. The three-position mechanism cannot be operated when the circuit breaker is closed; while the three-position mechanism is being operated, the circuit breaker cannot be closed. The disconnector and circuit breaker operating mechanisms of complete equipment often utilize a centralized, integrated design, leading to problems with interlocking between the two mechanisms. Existing interlocking mechanisms often have a large number of parts, complex assembly, and relatively high costs.

[0004] The Chinese utility model patent with authorization announcement number CN219800694U disclosed a mechanical interlocking device on October 3, 2023. The device includes a spatial linkage mechanism and a baffle. The spatial linkage mechanism includes a crank arm and a circuit breaker unlocking link. The spatial linkage mechanism is installed on the main shaft of the circuit breaker. The baffle is connected to the other end of the spatial linkage mechanism. Under the action of the spatial linkage mechanism, the baffle can be rotated between two positions: blocking the isolating switch operating hole and avoiding the isolating switch operating hole. When the circuit breaker is in the closed state, the baffle will block the isolating switch operating hole, thereby preventing the three-position mechanism from being operated. When the circuit breaker is in the open state, the baffle will move away from the isolating switch operating hole, so that the isolating switch can be operated. The mechanical interlocking device has a simple structure and can realize the locking of the isolating switch, but the device cannot realize the locking of the circuit breaker when operating the isolating switch. Utility Model Content

[0005] The purpose of the present utility model is to provide an interlocking structure of a circuit breaker and a three-position switch. The purpose of the present utility model is also to provide a switch cabinet. The interlocking structure of the circuit breaker and the three-position switch is installed in the switch cabinet to solve the problem that the existing interlocking device cannot lock the circuit breaker.

[0006] To achieve the above objectives, the interlocking structure of the circuit breaker and the three-position switch of the present invention adopts the following technical solutions:

[0007] The interlocking structure of the circuit breaker and the three-position switch comprises a three-position switch interlocking structure, a circuit breaker mechanism, a three-position mechanism and an operation panel, a rotating shaft is arranged on the mechanism box of the circuit breaker mechanism, a three-position unlocking link mechanism and a baffle are fixedly connected to the rotating shaft, the baffle can block and avoid the closing release device on the circuit breaker mechanism under the action of the rotating shaft, a three-position mechanism unlocking plate is connected to the three-position unlocking link mechanism, a three-position mechanism unlocking handle is fixedly installed on the three-position mechanism unlocking plate, the three-position mechanism unlocking plate is a push-pull plate connected to the operation panel, the baffle avoids the closing release device when the three-position mechanism unlocking plate blocks the isolation switch operation hole on the operation panel, and the baffle blocks the closing release device when the three-position mechanism unlocking plate avoids the isolation switch operation hole on the operation panel.

[0008] Further, the connection between the three-position mechanism unlocking plate and the three-position unlocking link mechanism is a lever structure, and the fulcrum position of the lever structure is connected to the operation panel.

[0009] Further, the lever structure is an L-shaped link.

[0010] Further, flat surfaces are arranged on the circumferential surfaces of both ends of the rotating shaft, the baffle and the three-position unlocking link mechanism are vertically installed on the two flat surfaces respectively, and the two flat surfaces are arranged at a certain angle so that the baffle will avoid the closing release device when the three-position mechanism unlocking plate blocks the isolation switch operation hole on the operation panel, and the baffle will block the closing release device when the three-position mechanism unlocking plate avoids the isolation switch operation hole on the operation panel.

[0011] Further, the baffle is welded to the rotating shaft, and the three-position unlocking link mechanism is connected to the rotating shaft through a screw.

[0012] Further, a long hole is arranged on the three-position mechanism unlocking plate, and the long hole is connected to a pin on the operation panel.

[0013] Further, the three-position switch interlocking structure comprises a crank arm, a circuit breaker link and an operation baffle.

[0014] Further, the operation baffle is connected to the operation panel through a pin.

[0015] Further, the operation baffle is located behind the three-position mechanism unlocking plate.

[0016] Beneficial Effects: The interlocking structure of a circuit breaker and a three-position switch of the present invention is an improved invention. Specifically, a rotating shaft is installed on the mechanism box of the circuit breaker mechanism. When the three-position mechanism is operated, the unlocking handle of the three-position mechanism is moved so that the unlocking plate of the three-position mechanism clears the operating hole of the isolating switch, thereby driving the three-position unlocking connecting rod mechanism to move upward and the rotating shaft to rotate. The baffle on the rotating shaft blocks the closing release, making it impossible for the circuit breaker mechanism to perform the closing operation, thereby locking the circuit breaker. The interlocking structure of the circuit breaker and the three-position switch and the isolating switch of the present invention are simple in structure and easy to operate. They can not only lock the isolating switch but also lock the circuit breaker.

[0017] The switch cabinet of this utility model adopts the following technical solutions:

[0018] The switch cabinet includes an interlocking structure of a circuit breaker and a three-position switch, and the interlocking structure of the circuit breaker and the three-position switch is installed in the switch cabinet; the interlocking structure of the circuit breaker and the three-position switch includes a three-position switch locking structure, a circuit breaker mechanism, a three-position mechanism and an operation panel. A rotating shaft is provided on the mechanism box of the circuit breaker mechanism, and the rotating shaft is fixedly connected with a three-position unlocking connecting rod mechanism and a baffle. Under the action of the rotating shaft, the baffle can block and avoid the closing release on the circuit breaker mechanism. The three-position unlocking connecting rod mechanism is connected to the three-position mechanism unlocking plate, and the three-position mechanism unlocking handle is fixedly installed on the three-position mechanism unlocking plate. The three-position mechanism unlocking plate is a push-pull plate connected to the operation panel. When the three-position mechanism unlocking plate blocks the isolating switch operating hole on the operation panel, the baffle allows the closing release to open. When the three-position mechanism unlocking plate allows the isolating switch operating hole on the operation panel to open, the baffle blocks the closing release.

[0019] Furthermore, the connection between the three-station mechanism unlocking plate and the three-station unlocking connecting rod mechanism is a lever structure, and the fulcrum position of the lever structure is connected to the operation panel.

[0020] Furthermore, the lever structure is an L-shaped connecting rod.

[0021] Furthermore, two ends of the rotating shaft are provided with planes on the circumference, and the baffle and the three-position unlocking linkage mechanism are respectively installed vertically on the two planes. A certain angle is formed between the two planes so that when the unlocking plate of the three-position mechanism blocks the operating hole of the disconnector on the operating panel, the rotating shaft rotates the baffle to open and close the releaser, and when the unlocking plate of the three-position mechanism clears the operating hole of the disconnector on the operating panel, the rotating shaft rotates the baffle to block the closing releaser.

[0022] Furthermore, the baffle is welded to the rotating shaft, and the three-position unlocking link mechanism is connected to the rotating shaft via screws.

[0023] Further, the three-position mechanism unlocking plate is provided with a long hole, and the long hole is connected with the pin on the operation panel.

[0024] Further, the three-position switch locking structure comprises a crank arm, a circuit breaker connecting rod and an operation baffle.

[0025] Further, the operation baffle is connected with the operation panel through a pin.

[0026] Further, the operation baffle is located behind the three-position mechanism unlocking plate.

[0027] Beneficial effects: the switch cabinet is an improved invention, specifically, the switch cabinet is provided with an interlocking structure of a circuit breaker and a three-position switch, the interlocking structure of the circuit breaker and the three-position switch is provided with a rotating shaft on the mechanism box of the circuit breaker mechanism, when the three-position mechanism is operated, the three-position mechanism unlocking handle is moved to make the three-position mechanism unlocking plate leave the isolation switch operation hole, so as to drive the three-position unlocking connecting rod mechanism to move upward, the rotating shaft rotates, and the baffle on the rotating shaft blocks the closing release, so that the circuit breaker mechanism cannot be operated, and the circuit breaker is locked. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structure diagram of an embodiment of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0029] Figure 2 FIG. 2 is a back structure diagram of the embodiment of the interlocking structure of the circuit breaker and the three-position switch of the utility model; Figure 1

[0030] Figure 3 FIG. 3 is a structure diagram of the circuit breaker closing state of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0031] Figure 4 FIG. 4 is a structure diagram of the circuit breaker opening state of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0032] Figure 5 FIG. 5 is a structure diagram of the circuit breaker locking of the embodiment of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0033] Figure 6 FIG. 6 is an internal structure diagram of the embodiment of the interlocking structure of the circuit breaker and the three-position switch of the utility model; Figure 5

[0034] Figure 7 ​​This is a schematic diagram of the cooperation between the operating baffle and the unlocking plate of the interlocking structure of the circuit breaker and the three-position switch of the utility model when the circuit breaker is in the closed state;

[0035] Figure 8 This is a schematic diagram of the cooperation between the operating baffle and the unlocking plate of the interlocking structure of the circuit breaker and the three-position switch of the utility model when the circuit breaker is in the open state;

[0036] Figure 9 A schematic diagram of the cooperation between the operating baffle and the unlocking plate of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0037] Figure 10 This is a schematic diagram of the operating panel structure of the interlocking structure of the circuit breaker and the three-position switch of the utility model;

[0038] Figure 11 A schematic structural diagram of a three-position mechanism unlocking plate of an interlocking structure between a circuit breaker and a three-position switch according to the present invention;

[0039] Figure 12 The figure is a structural diagram of the rotating shaft of the interlocking structure of the circuit breaker and the three-position switch of the utility model.

[0040] In the figure: 1. Operating handle, 2. Operating panel, 3. Operating hole of disconnector, 4. Unlocking link of three-position switch, 5. Unlocking link of circuit breaker, 6. Crank arm, 7. Crank arm of rotating shaft, 8. Baffle, 9. Closing release, 10. Operating baffle, 11. Operating baffle link, 12. Unlocking plate of three-position mechanism, 13. L-shaped connecting rod, 14. Unlocking handle of three-position mechanism, 15. Rotating shaft, 16. Rotating shaft plane. DETAILED DESCRIPTION

[0041] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0042] Aiming at the problem that the existing interlocking device between a circuit breaker and a three-position switch cannot lock the circuit breaker, the utility model proposes an interlocking structure between the circuit breaker and the three-position switch which can lock the three-position switch and the circuit breaker.

[0043] In a basic embodiment, Figure 3 、 4As shown, a crank arm 6 is installed on the large shaft of the circuit breaker output, and a circuit breaker unlocking link 5 is connected to the crank arm 6. The crank arm 6 and the circuit breaker unlocking link 5 are connected through a pin shaft. The other end of the circuit breaker unlocking link 5 is fixedly connected with an operation baffle 10. When the circuit breaker is in the closing state, the crank arm 6 rotates upward to drive the circuit breaker unlocking link 5 to move upward. The operation baffle 10 fixedly connected to the circuit breaker unlocking link 5 blocks the isolation switch operation hole 3 on the operation panel, so that the operation handle 1 cannot enter the isolation switch operation hole 3 to operate the three-position mechanism. When the circuit breaker is in the opening state, the crank arm 6 rotates downward to drive the circuit breaker unlocking link 5 to move downward. The operation baffle 10 fixedly connected to the circuit breaker unlocking link 5 leaves the isolation switch operation hole 3 on the operation panel, so that the operation handle 1 can enter the isolation switch operation hole 3 to operate the three-position mechanism.

[0044] In other embodiments, the crank arm 6 and the circuit breaker unlocking link 5 can also be connected through bolts.

[0045] In a preferred embodiment, as shown in Figure 5 , 6 , a rotating shaft 15 is added to the mechanism box of the circuit breaker mechanism. The rotating shaft 15 is provided with rotating shaft planes 16 on the circumferential surfaces of the two ends. A rotating shaft crank arm 7 and a baffle 8 are connected to the rotating shaft 15. One end of the rotating shaft crank arm 7 is fixedly connected to the rotating shaft 15, and the other end is connected to a three-position switch unlocking link 4 through a pin shaft. The baffle 8 is fixedly connected to the rotating shaft 15. The other end of the three-position switch unlocking link 4 is also connected with an L-shaped link 13. One end of the L-shaped link 13 is connected to the three-position switch unlocking link 4 through a pin shaft, and the other end is connected with a three-position mechanism unlocking plate 12, as shown in Figure 11 . The L-shaped link 13 is connected to the operation panel 2 through a pin. The three-position mechanism unlocking plate 12 is fixedly installed with a three-position mechanism unlocking handle 14, as shown in Figure 10 . The three-position mechanism unlocking plate 12 is connected to the operation panel 2 through the three-position mechanism unlocking handle 14. When the three-position mechanism is manually operated, the three-position mechanism unlocking handle 14 moves to the right side while the L-shaped link 13 rotates, thereby driving the three-position switch unlocking link 4 to move upward and the rotating shaft 15 to rotate. The baffle on the rotating shaft 15 blocks the closing release lever, so that the closing release 9 cannot be pressed, and the circuit breaker mechanism cannot be operated.

[0046] In a preferred embodiment, as shown in Figure 1 , 2As shown, a crank arm 6 is installed on the output shaft of the circuit breaker, and the other end of the crank arm 6 is connected to a circuit breaker unlocking link 5. The crank arm 6 and the circuit breaker unlocking link 5 are connected by a pin shaft. The other end of the circuit breaker unlocking link 5 is connected to an operating baffle link 11, and an operating baffle 10 is fixedly connected to the operating baffle link 11. The operating baffle 10 is connected to the operating panel 2 through a pin. At the same time, an unlocking module is provided on the three-position mechanism. A rotating shaft 15 is added to the circuit breaker mechanism. One end of the rotating shaft 15 is fixedly connected to the baffle 8. The rotating shaft 15 and the baffle 8 are welded. The other end of the rotating shaft 15 is fixedly connected to the rotating shaft crank arm 7. The rotating shaft 15 and the rotating shaft crank arm 7 are screwed. The other end of the shaft crank arm 7 is connected to the three-position switch unlocking link 4, and the rotating shaft crank arm 7 and the three-position switch unlocking link 4 are connected by a pin shaft. The other end of the three-position switch unlocking link 4 is also connected to an L-shaped link 13, and the L-shaped link 13 and the three-position switch unlocking link 4 are connected by a pin shaft. The other end of the L-shaped link 13 is also connected to a three-position mechanism unlocking plate 12, and the three-position mechanism unlocking plate 12 and the L-shaped link 13 are connected by a pin shaft. A three-position mechanism unlocking handle 14 is fixedly connected to the three-position mechanism unlocking plate 12, and the three-position mechanism unlocking plate 12 is slidably connected to the operation panel 2 through the three-position mechanism unlocking handle 14. A long hole is opened on the operation panel 2 to cooperate with the three-position mechanism unlocking handle 14.

[0047] In a preferred embodiment, Figure 7 、 9 As shown, when the circuit breaker is in the closed state, the crank arm 6 on the output shaft of the circuit breaker rotates to drive the circuit breaker unlocking link 5 to rise, and the operating baffle 10 connected to the operating baffle link 11 just blocks the operating hole 3 of the three-position mechanism. The operating handle 1 cannot enter the operating hole 3 of the disconnector to operate the three-position mechanism, realizing the requirement that the three-position mechanism cannot be operated when the circuit breaker is in the closed state; Figure 8As shown, when the circuit breaker is in the open state, the crank arm 6 drives the circuit breaker unlocking link 5 to descend, the operating baffle 10 is removed from the position of the disconnecting switch operating hole 3, the operating handle 1 can enter the disconnecting switch operating hole 3 to operate the three-position mechanism, an unlocking module is arranged on the operating panel of the three-position mechanism, the three-position mechanism unlocking handle 14 is moved to the right during operation, the three-position mechanism unlocking plate 12 is in the unlocking state, so that the L-shaped connecting rod 13 rotates, the L-shaped connecting rod 13 drives the three-position switch unlocking link 4 to rise and drives the rotating shaft 15 to rotate, the baffle 8 connected to the rotating shaft 15 blocks the operating handle of the closing release 9, so that the closing release 9 cannot be pressed, and the circuit breaker mechanism cannot be closed, so that the requirement that the circuit breaker mechanism cannot be closed during the operation of the three-position mechanism is realized; the three-position mechanism unlocking handle 14 is moved to the left, at this time the three-position mechanism unlocking plate 12 blocks the disconnecting switch operating hole 3, and the three-position switch unlocking link 4 drives the rotating shaft 15 to rotate, the baffle 8 on the rotating shaft 15 leaves the closing release 9, at this time the circuit breaker can be closed.

[0048] The embodiment of the switch cabinet of the utility model:

[0049] The utility model discloses a switch cabinet's interlocking structure of circuit breaker and three position switch, the interlocking structure of circuit breaker and three position switch is installed in switch cabinet.

[0050] The above is only the preferred embodiment of the utility model, and does not use to limit the utility model, the patent protection scope of the utility model is accurate to the patent claim, and the equivalent structural change that applies the specification and the attached drawing contents of the utility model should be contained in the protection scope of the utility model, and the same reason is obtained.

Claims

1. An interlocking structure of a circuit breaker and a three-position switch, comprising a three-position switch locking structure, a circuit breaker mechanism, a three-position mechanism and an operation panel, characterized in that The mechanism box of the circuit breaker mechanism is provided with a rotating shaft, and a three-position unlocking connecting rod mechanism and a baffle are fixedly connected to the rotating shaft. The baffle can block and avoid the closing release on the circuit breaker mechanism under the action of the rotating shaft. The three-position unlocking connecting rod mechanism is connected to the three-position mechanism unlocking plate, and the three-position mechanism unlocking handle is fixedly installed on the three-position mechanism unlocking plate. The three-position mechanism unlocking plate is a push-pull plate connected to the operation panel. When the three-position mechanism unlocking plate blocks the isolating switch operating hole on the operation panel, the baffle allows the closing release to be opened. When the three-position mechanism unlocking plate allows the isolating switch operating hole on the operation panel to be opened, the baffle blocks the closing release.

2. The interlocking structure of the circuit breaker and the three-position switch according to claim 1, characterized in that: The connection between the three-station mechanism unlocking plate and the three-station unlocking connecting rod mechanism is a lever structure, and the fulcrum position of the lever structure is connected to the operation panel.

3. The interlocking structure of the circuit breaker and the three-position switch according to claim 2, characterized in that: The lever structure is an L-shaped connecting rod.

4. The interlocking structure of the circuit breaker and the three-position switch according to claim 1, characterized in that: The circumferential surfaces of both ends of the rotating shaft are provided with planes, and the baffle and the three-position unlocking linkage mechanism are respectively vertically installed on the two planes. A certain angle is formed between the two planes so that when the unlocking plate of the three-position mechanism blocks the operating hole of the disconnector on the operating panel, the rotating shaft rotates the baffle to open and close the releaser. When the unlocking plate of the three-position mechanism clears the operating hole of the disconnector on the operating panel, the rotating shaft rotates the baffle to block the closing releaser.

5. The interlocking structure of the circuit breaker and the three-position switch according to claim 4, characterized in that: The baffle is connected to the rotating shaft by welding, and the three-position unlocking connecting rod mechanism is connected to the rotating shaft by screws.

6. The interlocking structure of a circuit breaker and a three-position switch according to claim 1, characterized in that: The unlocking plate of the three-station mechanism is provided with a long hole, and the long hole is matched with the pin on the operation panel for connection.

7. The interlocking structure of a circuit breaker and a three-position switch according to claim 1, characterized in that: The three-position switch locking structure includes a crank arm, a circuit breaker connecting rod and an operating baffle.

8. The interlocking structure of the circuit breaker and the three-position switch according to claim 7, characterized in that: The operation baffle is connected to the operation panel through pins.

9. The interlocking structure of the circuit breaker and the three-position switch according to claim 8, characterized in that: The operating baffle is located behind the unlocking plate of the three-station mechanism.

10. A switch cabinet, characterized in that: The interlocking structure of the circuit breaker and the three-position switch comprises the interlocking structure of any one of claims 1 to 9, and the interlocking structure of the circuit breaker and the three-position switch is installed in a switch cabinet.

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