CN103050304B - Five-prevention interlocking mechanism - Google Patents

Abstract

A five-proof interlocking mechanism includes a lower door grounding interlocking unit, an isolated load interlocking unit, and an isolated grounding interlocking unit. The lower door grounding interlock unit is composed of the hanging door arm plate connected to the lower door interlocking connection rod, the upper end is connected to the interlocking connector, the interlocking connector is connected to one end of the crank arm, and the other end is connected to the lower door interlocking half shaft. When the plate is not hooked or the lower door is hooked, respectively lock or unlock the grounding baffle located in front of the grounding operation shaft to limit the opening and closing of the grounding switch and the opening and locking states of the lower door. The isolation load interlock and isolation ground interlock unit is composed of isolation indicator wheel, ground indicator wheel, cam and camshaft. After the isolating switch and the grounding switch are closed, the grounding baffle and the isolating baffle are locked in front of the grounding operation shaft and the isolation operation shaft respectively, so as to limit misoperation of the grounding switch and the isolating switch. The invention has the advantages of small volume, convenient installation, simple and convenient operation, safety and reliability.

Description

A five-proof interlocking mechanism

technical field

The invention relates to a high-voltage electrical equipment door lock, in particular to a five-proof interlocking mechanism.

Background technique

The power system has always attached great importance to the safe operation of the system, but there will always be various accidents caused by electrical misoperation every year, causing unnecessary losses. In order to effectively prevent personal and major equipment accidents caused by misoperation of operating electrical equipment, my country put forward the requirements of "five preventions" for electrical equipment as early as 1990, and stipulated the management, operation, design and management of misoperation prevention devices in the form of laws and regulations. Principles of use. According to regulations, the design principle of the anti-misoperation device is: all high-voltage electrical equipment that may cause misoperation should be equipped with an anti-misoperation device.

Most of the traditional interlocking mechanisms are lever transmission, the operation torque is large and labor-intensive, and the transmission distance is long, and the error accumulation is large. Traditional interlocks are bulky and inconvenient to install. In view of this situation, our company has specially developed a five-proof interlocking mechanism with a simple structure, easy operation, convenient installation and good mechanical structure. Rigid connection structurally avoids problems such as chain failure caused by insufficient rigidity of the chain structure, and effectively eliminates accidents caused by misoperation. This new chain scheme can significantly improve the quality of power supply.

Contents of the invention

The technical problem to be solved by the present invention is to provide a five-proof interlocking mechanism with simple structure, easy operation, good protection and purely mechanical structure.

The technical solutions adopted are:

A five-proof interlock mechanism includes a cabinet body, an isolation operation shaft, a ground operation shaft, a lower door ground interlock unit, an isolation load interlock, and an isolation ground interlock unit. The lower door grounding interlocking unit includes a lower door interlocking connecting rod, a grounding baffle, an interlocking connector, a lower door interlocking half shaft, a lower door locking shaft, a crank arm, and a door hanging arm plate. The door-hanging arm plate connects the lower end of the lower door interlock connection pull rod, the upper end of the lower door interlock connection pull rod connects the interlock connector, the upper end of the interlock connector is hinged with one end of the turning arm, and the other end of the turning arm connects the lower door interlock half shaft. The grounding baffle is movably connected to the front end of the grounding operation shaft. When the door-hanging arm plate is not hung on the lower door, the grounding baffle blocks in front of the grounding operation shaft. The grounding baffle is locked by the lower door interlocking shaft and cannot Move, the grounding switch cannot be operated by the grounding operating shaft. After the hanging door arm plate is hooked to the lower door, the lower door presses the hanging door arm plate, and the interlocking half shaft of the lower door is rotated through the interlocking connector, the lower door interlocking connecting rod and the crank arm transmission, unlocking, and removing the grounding The baffle, the earthing switch is operated by the earthing operating shaft. After the earthing switch is switched on, the lower door locking shaft connected with the earthing switch main shaft rotates to lock the lower door, and the lower door cannot be opened.

The isolated ground interlock and isolated load interlock unit includes a ground baffle, an isolation baffle, an isolation indicator wheel, a ground indicator wheel, an isolation interlock block, a switch output plate, an output crank arm, a cam, and a camshaft. The isolation indicator wheel is connected to the drive shaft of the isolation switch, the isolation indicator wheel is locked and connected to the grounding baffle, the grounding indicator wheel is connected to the drive shaft of the grounding switch, and the grounding indicator wheel is locked and connected to the isolation baffle. The camshaft is connected to the drive shaft of the load switch, the cam is installed on the camshaft, the rotating cam is connected to the output crank arm, the output crank arm is connected to one end of the switch output board, and the other end of the switch output board is connected to the isolation interlock block to isolate the The interlocking baffle is locked and connected with the isolation baffle. When the isolation switch is closed, the isolation indicator wheel turns to lock the grounding baffle, and the grounding baffle blocks in front of the grounding operation shaft, and the grounding switch cannot be operated at this time. When the grounding switch is closed, the grounding indicator wheel rotates to lock the isolation baffle, and the isolation baffle blocks the front of the isolation operation shaft, and the isolation switch cannot be operated at this time; when the load switch (circuit breaker) is closed, the camshaft drives the cam to rotate, The cam hits the output crank arm, the output crank arm drives the switch output plate to rotate, and the isolation interlock block moves together with the switch output plate. After the isolation interlock block moves, the isolation baffle is locked, and the isolation baffle blocks the front of the isolation operation shaft. Isolation switch is inoperable.

Features of the present invention:

1. The interlock mechanism is small in size and easy to install.

2. The transmission distance is short and the cumulative error is small.

3. Small operating torque and easy operation.

4. Good interlocking strength, safe and reliable.

It should be noted that: on the premise of not changing the principles and concepts of the present invention, any changes or deformations are within the protection scope of the present invention .

Description of drawings

Fig. 1 is the structure and connection diagram of the present invention.

Detailed ways

A five-proof interlocking mechanism, including a cabinet body 16, an isolation operation shaft 17, a grounding operation shaft 18, a lower door grounding interlocking unit, an isolated load interlocking unit, and an isolated grounding interlocking unit. The lower door grounding interlocking unit includes a lower door interlocking connecting rod 10, a grounding baffle 6, an interlocking connector 9, a lower door interlocking half shaft 7, a lower door locking shaft 12, a crank arm 8, and a hanging door Arm board 11. The door hanging arm plate 11 is connected to the lower end of the lower door interlock connection pull rod 10, the upper end of the lower door interlock connection pull rod 10 is connected to the interlock connector 9, the upper end of the interlock connector 9 is hinged with one end of the crank arm 8, and the other end of the crank arm 8 is connected Door interlock axle 7. The grounding baffle 6 is movably connected to the outside of the front end of the grounding operation shaft 18. When the door-hanging arm plate 11 is not hung on the door, the grounding baffle 6 is blocked in front of the grounding operation shaft 18, and the grounding baffle 6 is interlocked by the lower door. The half shaft 7 is locked and cannot be moved, and the grounding switch cannot be operated by the grounding operation shaft. After the hanging door arm plate 11 is hooked to the lower door, the lower door presses the hanging door arm plate, and the lower door interlocking half shaft 7 is rotated through the interlock connector 9, the lower door interlocking connection pull rod 10 and the crank arm 8, and the locking mechanism is released. Lock, remove the grounding baffle 6, and operate the grounding switch through the grounding operation shaft 18. After the earthing switch is switched on, the lower door locking shaft 12 connected with the earthing switch main shaft rotates to lock the lower door, and the lower door cannot be opened.

The isolated ground interlock and isolated load interlock unit includes a ground baffle 6, an isolation baffle 4, an isolation indicator wheel 3, a ground indicator wheel 5, an isolation interlock block 2, a switch output board 1, and an output crank arm 14, cam 13, camshaft 15. The isolation indicator wheel 3 is connected to the drive shaft of the isolation switch, the isolation indicator wheel 3 is locked and connected with the grounding baffle 6 , the grounding indicator wheel 5 is connected to the drive shaft of the grounding switch, and the grounding indicator wheel 5 is locked and connected with the isolation baffle 4 . The camshaft 15 is connected to the drive shaft of the load switch, the cam 13 is mounted on the camshaft 15, and the cam is connected to the output crank arm 14 when rotating, and the output crank arm 14 is connected to one end of the switch output board 1 and the other end of the switch output board 1 The connection isolating interlocking baffle 2 and the isolating baffle 4 are locked and connected. After the isolating switch is switched on, the isolating indicator wheel 3 rotates and locks the grounding baffle 6, and the grounding baffle 6 is blocked in front of the grounding operation shaft 18, and the grounding switch cannot be operated at this moment. When the grounding switch is closed, the grounding indicator wheel 5 rotates to lock the isolation baffle 4, and the isolation baffle 4 blocks in front of the isolation operation shaft 17, and the isolation switch cannot be operated; when the load switch (circuit breaker) is closed, the camshaft 15 drives The cam 13 rotates, the cam 13 hits the output crank arm 14, the output crank arm 14 drives the switch output plate 1 to rotate together, and the isolation interlock plate 2 moves to lock the isolation baffle, and the isolation baffle 4 is blocked in front of the isolation operation shaft 17. The isolating switch cannot be operated, forming a five-proof interlocking mechanism.

Claims (1)

1. an anti-interlocking device, comprise cabinet (16), isolated operation axle (17), ground connection operating axis (18), Xiamen ground connection interlocking unit, isolation load interlocking and isolation ground connection interlocking unit, it is characterized in that described Xiamen ground connection interlocking unit, comprise lower gate interlock cylinder lever connecting rod (10), grounded barrier (6), interlocking connector (9), lower gate interlock semiaxis (7), Xiamen lock shaft (12), connecting lever (8), door hanging arm plate (11), door hanging arm plate (11) connects lower gate interlock cylinder lever connecting rod (10) lower end, lower gate interlock cylinder lever connecting rod (10) upper end connects interlocking connector (9), interlocking connector (9) upper end and connecting lever (8) one end hinged, connecting lever (8) other end connects lower gate interlock semiaxis (7), grounded barrier (6) is movably connected in the front end outer side of ground connection operating axis (18), under described door hanging arm plate (11) does not hang Xiamen situation, grounded barrier (6) gear is in ground connection operating axis (18) front, grounded barrier (6) cannot be moved by lower gate interlock semiaxis (7) locking, ground connection operating axis (18) operational grounding switch cannot be passed through, under door hanging arm plate (11) mounting behind the door, Xiamen compressing door hanging arm plate (11), by interlocking connector (9), interlocking cylinder lever connecting rod (10) and connecting lever (8) transmission, lower gate interlock semiaxis (7) is rotated, unlock, remove grounded barrier (6), by ground connection operating axis (18) operational grounding switch, after earthed switch closes a floodgate, the Xiamen lock shaft (12) be connected with grounding switch main shaft is rotated lower door locked, and Xiamen cannot be opened, described isolation ground connection interlocking and isolation load interlocking unit, comprise grounded barrier (6), isolation baffle plate (4), isolation indicator wheel (3), ground connection indicator wheel (5), isolation interlocking catch (2), switch output board (1), output toggle arm (14), cam (13), camshaft (15), isolation indicator wheel (3) connects the driving shaft of isolating switch, isolation indicator wheel (3) is connected with grounded barrier (6) is sealed, ground connection indicator wheel (5) connects the driving shaft of earthed switch, ground connection indicator wheel (5) is connected with isolation baffle plate (4) is sealed, camshaft (15) is connected with the driving shaft of on-load switch, cam (13) is contained on camshaft (15), cam when turning is connected with output toggle arm (14), output toggle arm (14) connecting valve output board (1) one end, switch output board (1) other end connects isolation interlocking catch (2), isolation interlocking catch (2) is connected with isolation baffle plate (4) is sealed, after isolating switch closes a floodgate, isolation indicator wheel (3) twist-lock grounded barrier (6), grounded barrier (6) gear is in ground connection operating axis (18) front, now cannot operational grounding switch, after earthed switch closes a floodgate, ground connection indicator wheel (5) twist-lock isolation baffle plate (4), isolation baffle plate (4) gear, cannot disconnecting switch operation before isolated operation axle (17), after on-load switch closes a floodgate, camshaft (15) band moving cam (13) rotates, cam (13) clashes into output toggle arm (14), output toggle arm (14) drives switch output board (1) to rotate together, baffle plate locking will be isolated after isolation interlocking catch (2) is mobile, isolation baffle plate (4) gear is in isolated operation axle (17) front, and isolating switch can not operate.