Three-position anti-misoperation interlocking device and high-voltage gassing chamber

Abstract

The application discloses a three-station anti-misoperation interlocking device and a high-voltage gas-filled tank in the technical field of gas-insulated metal-enclosed switchgear components, and the three-station anti-misoperation interlocking device comprises a rotating shaft, a limiting disc assembly fixedly installed on the rotating shaft in a direction perpendicular to an axial direction, a limiting assembly outside the rotating shaft and a fixed position indicating device outside a disc surface of the limiting disc assembly, a rotating position indicating device and a limiting feature are arranged on the limiting disc assembly, the rotating position indicating device cooperates with the fixed position indicating device outside the disc surface of the limiting disc assembly to display the position of the limiting disc assembly rotating around the rotating shaft, the limiting assembly comprises a key mechanical lock corresponding to the three stations and a limiting rod, the limiting rod is inserted into the limiting feature to prevent the limiting disc assembly from rotating, and the limiting rod realizes electrical interlocking by pressing a stroke switch through a pressing rod, and the scheme solves the problems of poor reliability and poor compatibility of the three-station interlocking device in the prior art, and achieves the beneficial effects of simplifying the structure, improving the reliability and the compatibility.

Description

Technical Field

[0001] This application relates to the technical field of gas-insulated metal-enclosed switchgear components, specifically a three-position anti-misoperation interlocking device and a high-voltage gas-filled switchgear. Background Technology

[0002] Interlocking relationships need to be established between medium and high voltage switchgear and upstream and downstream equipment in the system. The three-position disconnector of the switchgear has three different working positions: closed, open, and grounded. To prevent misoperation during operation and maintenance, there are specific interlocking requirements for each of the three different working positions. Simple electrical interlocking is unreliable due to the influence of electrical components. Other solutions exist, such as the three-position structure disclosed in patent document CN112863937B, which focuses on both electric and manual operation modes. This structure is complex, and its gear mechanism can easily lead to over-operation or incomplete switching, posing safety hazards. In contrast, the interlocking system of the three-position mechanism disclosed in patent document CN119275037A has a distributed interlocking logic, achieving interlocking through multiple limit units. The numerous components and complex installation reduce reliability. The interlocking device of the three-station mechanism disclosed in the patent document with authorization announcement number CN217606714U relies on sliding connections for its interlocking components, which are prone to wear. It only achieves basic interlocking and cannot be extended to system-level interlocking. The interlocking mechanism for gas-filled switchgear disclosed in the patent document with authorization announcement number CN221899935U simplifies the design with limit plates and locking mechanisms, but it is only for circuit breaker switches and disconnect switches. It has a single function, lacks multi-station interlocking capability, and has poor safety. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this solution provides a three-position anti-misoperation interlocking device and a high-pressure gas filling cabinet to solve the problems of poor reliability and poor compatibility of the aforementioned existing three-position interlocking devices.

[0004] To achieve the above objectives, this solution is implemented through the following technical approach:

[0005] A three-position anti-misoperation interlocking device is used in a three-position operating mechanism. The three positions include closing, opening, and grounding positions. It includes a rotating shaft driven by the operating shaft of the three-position operating mechanism, a limit plate assembly fixedly mounted perpendicularly to the rotating shaft, a limit component outside the rotating shaft, and a fixed position indicator outside the limit plate assembly. The limit plate assembly has a rotational position indicator on its surface, which, in conjunction with the fixed position indicator, displays the position of the limit plate assembly rotating around the rotating shaft. The limit plate assembly has limit features corresponding to the three positions. Each limit component includes a mechanical lock corresponding to the three positions and a limit rod fixed to the lock tongue of the mechanical lock. The mechanical lock is a key-operated mechanical lock configured so that the key can only be removed for the next level of operation when the lock is engaged. When performing a limit operation, the limit rod inserts into the limit feature on the limit plate assembly to prevent the limit plate assembly from rotating.

[0006] Preferably, the limiting disk assembly includes a limiting disk and a position indicator disk. The position indicator disk is attached to the disk surface of the limiting disk facing the fixed position indicator device as a rotational position indicator device. The position indicator disk is provided with markings corresponding to three workstation positions along the disk surface. Each marking includes two combination and separation marks arranged in the radial direction.

[0007] Preferably, the fixed position indicating device includes a three-position panel and a position indicator plate. The three-position panel and the position indicator plate have two concentric marking holes corresponding to the open / close markings. The position indicator plate is printed with grounding and open / close markings.

[0008] Preferably, the limiting rod includes a grounding locking limiting rod, a grounding blocking limiting rod, and a closing blocking limiting rod. The grounding locking limiting rod is used to lock the limiting disk assembly in the grounding position. The grounding blocking limiting rod is used to prevent the limiting disk assembly from rotating from the open position to the grounding position. The closing blocking limiting rod is used to prevent the limiting disk assembly from rotating from the open position to the closed position.

[0009] Preferably, the limiting disk assembly further includes a limiting block, which is installed on the disk surface of the limiting disk facing away from the fixed position indicator device and rotates synchronously with the limiting disk. It extends an open flange in the axial direction facing away from the fixed position indicator device. The two ends of the flange respectively cooperate with the grounding limit rod and the closing limit rod to complete the limiting function of the two limit rods. The limiting disk has a notch and slot at the circumferential position corresponding to the rotation axis rotating to the grounding position. The notch and slot cooperate with the grounding limit rod to complete the limiting function of locking the grounding limit rod. The notch and slot of the limiting disk and the flange end face of the limiting disk together constitute the limiting feature of the three positions.

[0010] Preferably, it also includes a limit switch plate and a limit switch. The limit switch plate is fixedly connected to the bolt or limit rod of the mechanical lock. The limit switch plate presses down on the limit switch corresponding to the three working positions. The limit switch is used to realize electrical interlocking. The electrical interlocking is configured such that only when the mechanical lock is fully unlocked, the three limit switch plates press down on the limit switch, and the limit switch gives a closed point signal to release the corresponding electrical interlocking.

[0011] Preferably, the limit switch plate includes a grounding limit switch plate, a grounding-blocking-closing limit switch plate, and a blocking-closing limit switch plate.

[0012] Preferably, the limit switch includes a ground-locking limit switch, a ground-blocking closing limit switch, and a closing limit switch.

[0013] Preferably, the transmission connection uses a transmission gear set, the three-position operating mechanism is a direct-acting operating mechanism, and the operating shaft drives the rotating shaft to rotate through the transmission gear set.

[0014] Based on the same inventive concept, this solution also discloses a high-pressure gas-filled cabinet, including the aforementioned three-position anti-misoperation interlocking device.

[0015] Compared to existing technologies, this solution offers the following advantages: It provides a three-position anti-misoperation interlocking device that, through the exchange and transmission logic of mechanical lock keys, can not only achieve interlocking relationships with other components such as switchgear circuit breakers and cabinet doors, but also with other equipment within the power system. This effectively prevents personnel from misoperating or accidentally entering energized compartments, greatly ensuring the safety of maintenance personnel and the system. The mechanical lock key status provides a clear indication of the switch's locking status, preventing misoperation. The dual electrical and mechanical interlocking, compared to traditional single electrical interlocking, makes the mechanical program lock more reliable and intuitive. Its simple mechanical structure facilitates easy operation and compatibility with different systems. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present application, showing a direct-acting three-position operating mechanism.

[0017] Figure 2a This application provides a schematic diagram illustrating the relative positional relationship between a position indicator panel and a position indicator sign, as shown in this embodiment.

[0018] Figure 2b This application presents a schematic diagram illustrating the relative positional relationship between the position indicator panel and the position indicator plate in an embodiment of the circuit breaker position.

[0019] Figure 2c This is a schematic diagram illustrating the relative positional relationship between the position indicator panel and the position indicator plate in an embodiment of the current application for the closed position.

[0020] Figure 3This is an exploded view of the structure according to an embodiment of this application;

[0021] Figure 4a This is a rear view of the three-position panel in the blocking and closing state according to an embodiment of this application, and an enlarged view of the details of the limit panel;

[0022] Figure 4b This is a rear view of a three-position panel in a grounded state according to an embodiment of this application, and an enlarged view of the details at the limiting plate.

[0023] Figure 4c This is a rear view of a three-position panel in a locked grounding state according to an embodiment of this application, and an enlarged view of the details of the limiting plate.

[0024] Among them, 1-three-position panel, 2-position indicator panel, 3-limit panel, 4-limit block, 5-locking grounding mechanical lock, 6-locking grounding limit rod, 7-locking grounding travel switch pressure plate, 8-locking grounding travel switch, 9-rotating shaft, 10-blocking grounding and closing travel switch, 11-blocking grounding and closing travel switch pressure plate, 12-blocking grounding and closing limit rod, 13-blocking grounding and closing mechanical lock, 14-blocking closing mechanical lock, 15-blocking closing travel switch, 16-blocking closing travel switch pressure plate, 17-blocking closing limit rod, 18-position indicator, 19-transmission gear set, 20-operating shaft. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] This embodiment provides a technical solution: a three-position anti-misoperation interlocking device for a three-position operating mechanism. The three positions include closing, opening, and grounding positions. The three-position operating mechanism includes a rotating shaft 9 and uses a rotary-linear motion conversion device to drive the moving contact to move back and forth. It includes a limit disk assembly fixedly mounted perpendicularly to the rotating shaft 9 and a limit component outside the rotating shaft. In this embodiment, the limit disk assembly includes a limit disk 3, a position indicator disk 2, and a limit block 4. A hexagonal hole is opened between the limit disk 3 and the limit block 4. A hexagonal connecting part is provided at the corresponding connection position of the rotating shaft 9. The rotating shaft 9 drives the limit disk 3 and the limit block 4 to rotate synchronously through the hexagonal connecting part. The fixed connection relationship of the three can also be fixed by a four-corner or gear-like method. A rotating part is provided on the surface of the limit disk assembly. A rotation position indicator device, in conjunction with a fixed position indicator device outside the limit plate assembly, displays the rotation position of the limit plate assembly around the rotation axis 9. The limit plate assembly is equipped with limit features corresponding to three positions. The limit assembly includes mechanical locks corresponding to the three positions and limit rods fixed to the lock tongues of the mechanical locks. The mechanical locks are key-operated mechanical locks, configured so that the key can only be removed for the next level of operation when locked. Through the key exchange and transmission logic of the mechanical locks, a key-interlocking system is formed, enabling interlocking relationships not only with switchgear circuit breakers, cabinet doors, and other components, but also with other equipment within the power system. When performing a limit operation, the limit rod inserts into the limit features on the limit plate assembly to prevent the limit plate assembly from rotating. In this embodiment, the key-operated mechanical lock includes a grounding locking mechanical lock 5, a ground-blocking closing mechanical lock 13, and a closing closing mechanical lock 14. The lock tongue of the grounding locking mechanical lock 5 moves horizontally, while the lock tongues of the ground-blocking closing mechanical lock 13 and the closing closing mechanical lock 14 move vertically. In addition to the implementation of the limit disk 3 plus limit block 4 used in this embodiment, the limit features corresponding to the three working positions set on the limit disk assembly can also be integrated or other limit features suitable for the current three working positions can be designed when manufacturing in a suitable manner.

[0027] In this embodiment, the position indicator disk 2 is attached to the surface of the limiting disk 3 facing the fixed position indicator device as a rotary position indicator device. The position indicator disk 2 has markings corresponding to three workstation positions along its surface. Each marking includes two radially arranged closing / opening marks. The fixed position indicator device includes a three-station panel 1 and a position indicator plate 18. The three-station panel 1 and the position indicator plate 18 have two concentric marking holes corresponding to the closing / opening marks. The surface of the position indicator plate 18 is printed with grounding and opening / closing marks. Besides the method in this embodiment, the rotary and fixed position indicators can also include only one mark for each type of indicator, with only one marking hole, but each mark must be different from the others. The fixed position indicator device can also consist only of the three-station panel 1, and the position indicator plate 18 can be directly printed on the three-station panel 1 using a silkscreen printing method. The three-station panel 1 also has holes for the protruding shaft 9 and the mechanical lock.

[0028] In this embodiment, the limiting rods include a grounding locking limiting rod 6, a grounding blocking limiting rod 12, and a closing blocking limiting rod 17. The grounding locking limiting rod 6 is an L-shaped bent piece that can be horizontally inserted into the notch slot of the limiting disk 3 to lock the limiting disk assembly in the grounding position. The grounding blocking limiting rod 12 and the closing blocking limiting rod 17 are n-shaped bent pieces that can move vertically. The grounding blocking limiting rod 12 is used to prevent the limiting disk assembly from rotating from the open position to the grounding position, and the closing blocking limiting rod 17 is used to prevent the limiting disk assembly from rotating from the open position to the closed position.

[0029] The limiting block 4 is installed on the surface of the limiting disk 3 facing away from the fixed position indicator device and rotates synchronously with the limiting disk 3. It extends an open flange along the axial direction. The two ends of the flange cooperate with the grounding limit rod 12 and the closing limit rod 17 to complete the limiting function of the two limit rods. The limiting disk 3 has a notch and slot at the circumferential position corresponding to the rotating shaft 9 rotating to the grounding position. The notch and slot cooperate with the grounding limit rod 6 to complete the limiting function of locking the grounding limit rod 6. The notch and slot of the limiting disk 3 and the flange end face of the limiting disk 3 together constitute the limiting feature of the three positions.

[0030] like Figure 4a As shown, when the mechanism rotates to the open position, the blocking / closing disengagement device 14 locks, and the locking tongue drives the blocking / closing limit rod 17 downward. The n-shaped bent head blocks the right end face of the flange of the limit block 4, stopping the limit block 4 from rotating counterclockwise towards the closed position, thus achieving the blocking / closing state; Figure 4b As shown, when the mechanism rotates to the open position, the grounding mechanical lock 13 engages, the locking tongue drives the grounding limiting rod 12 downwards, and the n-shaped bent head blocks the left end face of the flange of the limiting block 4, stopping the limiting block 4 from rotating clockwise towards the grounding position, thus achieving the grounding blocking state; Figure 4cAs shown, when the mechanism rotates to the grounding position, the grounding mechanical lock 5 is locked, and the locking tongue drives the grounding limit rod 6 to move to the right and horizontally insert it into the notch slot of the limit plate 3. The limit plate 3 rotates to achieve the grounding lock state.

[0031] In order to achieve electrical interlocking simultaneously and thus double interlocking, in this embodiment, the three-position anti-misoperation interlocking device also includes a limit switch plate and a limit switch. The limit switch plate is fixedly connected to the bolt or limit rod of the mechanical lock. The limit switch plate presses down on the limit switch corresponding to the three positions. The limit switch is used to realize electrical interlocking. The electrical interlocking is configured such that only when the mechanical lock is fully unlocked, the three limit switch plates press down on the limit switch, and the limit switch gives a closed point signal to release the corresponding electrical interlocking.

[0032] In this embodiment, the limit switch pressure plate includes a ground-locking limit switch pressure plate 7, a ground-blocking and closing limit switch pressure plate 11, and a closing and closing limit switch pressure plate 16. All limit switch pressure plates are Z-shaped pressure plates, with one end fixed to the limit rod and the other end having an inclined surface, which drives the pressure plate on the limit switch to press the limit switch contact. The limit switch includes a ground-locking limit switch 8, a ground-blocking and closing limit switch 10, and a closing and closing limit switch 15.

[0033] The three-station operating mechanism in this embodiment is a direct-acting operating mechanism. It includes an operating shaft 20, which uses a rotary-linear motion conversion device to drive the moving contact forward and backward. This device can be a sprocket and screw, etc. The operating shaft 20 drives the sprocket and screw to rotate, thus driving the moving contact. The transmission connection in this embodiment uses a transmission gear set 19, through which the operating shaft 20 drives the rotating shaft 9 to rotate. Besides gear transmission, other transmission methods such as chain transmission can also be used. The three-station anti-misoperation interlocking device of this embodiment can also be applied to other types of three-station operating mechanisms, such as cylindrical cam type or worm gear type, provided that the operating mechanism has components similar to the operating shaft 20, and some adaptive adjustments are made.

[0034] Based on the same inventive concept, this solution also discloses an embodiment of a high-pressure gas-filled switchgear, including the aforementioned three-position anti-misoperation interlocking device.

[0035] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A three-position anti-misoperation interlocking device for a three-position operating mechanism, wherein the three positions include closing, opening, and grounding positions, characterized in that: The device includes a rotating shaft (9) that is connected to the operating shaft (20) of the three-station operating mechanism, a limiting disk assembly that is fixedly mounted on the rotating shaft (9) perpendicular to the axial direction, a limiting component outside the rotating shaft, and a fixed position indicator device outside the disk surface of the limiting disk assembly. The limiting disk assembly is provided with a rotation position indicator device on its disk surface. The rotation position indicator device, in conjunction with the fixed position indicator device, displays the position of the limiting disk assembly rotating around the rotating shaft (9). The limiting disk assembly is provided with limiting features corresponding to the three stations. The limiting component includes a mechanical lock corresponding to the three stations and a limiting rod fixed on the bolt of the mechanical lock. The mechanical lock is a key mechanical lock. The key mechanical lock is configured such that the key can only be removed to perform the next level of operation when the lock is engaged. When performing the limiting operation, the limiting rod is inserted into the limiting feature on the limiting disk assembly to prevent the limiting disk assembly from rotating.

2. The three-station anti-misoperation interlocking device according to claim 1, characterized in that: The limiting disk assembly includes a limiting disk (3) and a position indicator disk (2). The position indicator disk (2) is attached to the disk surface of the limiting disk (3) facing the fixed position indicator device as a rotating position indicator device. The position indicator disk (2) is provided with markings corresponding to three work positions along the disk surface. Each marking includes two combination and separation marks arranged in the radial direction.

3. The three-station anti-misoperation interlocking device according to claim 2, characterized in that: The fixed position indicator device includes a three-position panel (1) and a position indicator plate (18). The three-position panel (1) and the position indicator plate (18) have two concentric marking holes corresponding to the opening and closing marks. The position indicator plate (18) is printed with grounding and opening / closing marks.

4. The three-station anti-misoperation interlocking device according to claim 2, characterized in that: The limiting rods include a grounding limiting rod (6), a ground-blocking closing limiting rod (12), and a closing limiting rod (17). The grounding limiting rod (6) is used to lock the limiting plate assembly in the grounding position. The ground-blocking closing limiting rod (12) is used to prevent the limiting plate assembly from rotating from the open position to the grounding position. The closing limiting rod (17) is used to prevent the limiting plate assembly from rotating from the open position to the closed position.

5. The three-station anti-misoperation interlocking device according to claim 4, characterized in that: The limiting disk assembly also includes a limiting block (4). The limiting block (4) is installed on the disk surface of the limiting disk (3) facing away from the fixed position indicator device and rotates synchronously with the limiting disk (3). It extends an open flange in the axial direction facing away from the fixed position. The two ends of the flange cooperate with the grounding limit rod (12) and the closing limit rod (17) to complete the limiting function of the two limit rods. The limiting disk (3) has a notch and slot at the circumferential position corresponding to the rotation shaft (9) when it rotates to the grounding position. The notch and slot cooperate with the grounding limit rod (6) to complete the limiting function of the grounding limit rod (6). The notch and slot of the limiting disk (3) and the flange end face of the limiting disk (3) together constitute the limiting feature of the three positions.

6. The three-station anti-misoperation interlocking device according to claim 1, characterized in that: It also includes limit switch pressure plates and limit switches. The limit switch pressure plates are fixedly connected to the bolt or limit rod of the mechanical lock. The limit switch pressure plates press down on the limit switches corresponding to the three working positions. The limit switches are used to realize electrical interlocking. The electrical interlocking is configured such that only when the mechanical lock is fully unlocked, the three limit switch pressure plates press down on the limit switches, and the limit switches give a closed point signal to release the corresponding electrical interlocking.

7. The three-station anti-misoperation interlocking device according to claim 6, characterized in that: The limit switch plate includes a grounding limit switch plate (7), a grounding limit switch plate (11), and a closing limit switch plate (16).

8. The three-station anti-misoperation interlocking device according to claim 6, characterized in that: The limit switches include a ground-locking limit switch (8), a ground-blocking closing limit switch (10), and a closing limit switch (15).

9. The three-station anti-misoperation interlocking device according to claim 1, characterized in that: The transmission connection uses a transmission gear set (19), the three-position operating mechanism is a direct-acting operating mechanism, and the operating shaft (20) drives the rotating shaft (9) to rotate through the transmission gear set (19).

10. A high-pressure gas-filled switchgear, characterized in that: Includes the three-station anti-misoperation interlocking device as described in any one of claims 1 to 9.

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