Ring main unit with anti-misoperation locking mechanism

Abstract

This invention relates to a ring main unit with an anti-misoperation interlocking mechanism, belonging to the field of ring main unit technology. It includes a ring main unit body, with a magnetic door installed on one side. An upper contact box and a lower contact box are installed inside the ring main unit body, with moving and stationary contacts respectively installed in the upper and lower contact boxes. An opening and closing assembly is provided inside the ring main unit body to drive the engagement and disengagement of the moving and stationary contacts. The opening and closing assembly includes an L-shaped support frame installed on one side of the ring main unit body, with a drive shaft laterally rotatably connected to the L-shaped support frame. This invention allows for automatic completion of the forced sequence of closing the door before closing and opening the door before opening, requiring only the operation of a handle. It eliminates the need for manual step-by-step operation, mitigating the risk of misoperation caused by varying personnel skill levels and inadequate adherence to operating procedures from a mechanical structure perspective. This significantly simplifies operation steps and reduces the difficulty of on-site training and practical operation.

Description

Technical Field

[0001] This invention relates to the field of ring main unit technology, specifically to a ring main unit with an anti-misoperation interlocking mechanism. Background Technology

[0002] Ring main units (RNBs) are key electrical equipment in power distribution networks, enabling power distribution, fault isolation, and line protection. They are widely used in urban and rural power distribution systems. To ensure the safety of equipment operation and field operations, existing RNBs are typically equipped with anti-misoperation interlocking mechanisms. These mechanisms often use mechanical locking pins, linkages, and other structures to achieve constraint interlocking, binding the opening and closing state of the cabinet door to the contact opening and closing mechanism. When the cabinet door is closed, the contact closing action is locked; when the contacts are in the closed state, the cabinet door opening is locked. This avoids the risk of misoperation and is a conventional technical means for the safety protection of RNBs.

[0003] In actual use of ring main units, some anti-misoperation interlocking mechanisms achieve sequential constraints through discrete mechanical structures. The operation process is interlocked, and operators must strictly follow the mandatory logic of closing the cabinet door first, then closing the contacts, and opening the cabinet door first. Any deviation in the operation sequence will prevent the cabinet door from opening or closing, or the contacts from opening or closing. This operation mode relies entirely on manual memory and standardized execution. However, the technical level and operational proficiency of on-site operators vary. Relying solely on pre-job training is insufficient to achieve a unified and standardized operation process for all personnel, which can easily lead to errors in the operation sequence. Therefore, it is necessary to optimize the operation logic at the structural level to reduce the impact of human factors.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a ring main unit with an anti-misoperation interlocking mechanism to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a ring main unit with an anti-misoperation interlocking mechanism, comprising a ring main unit body, a magnetic door installed on one side of the ring main unit body, an upper contact box and a lower contact box installed inside the ring main unit body, a moving contact and a stationary contact respectively installed in the upper contact box and the lower contact box, and an opening and closing component provided inside the ring main unit body for driving the engagement and disengagement of the moving contact and the stationary contact; The opening and closing assembly includes an L-shaped support frame installed on one side of the main body of the ring main unit. The L-shaped support frame is laterally rotatably connected to a drive shaft, which is connected to a moving contact. A curved groove is provided on one side of the drive shaft. A first return spring is connected to one side of the L-shaped support frame and is sleeved on the outer wall of the drive shaft. A guide rod is slidably connected to the side of the L-shaped support frame near the drive shaft. A drive plate is installed at one end of the guide rod. The end of the drive plate is designed to be inclined. A bracket is installed at the upper end of the drive plate. A pressing shaft is connected to the lower end of the bracket. The pressing shaft abuts against the curved groove. The other end of the first return spring is connected to the drive plate. The drive shaft moves through the drive plate. The magnetic door is equipped with an anti-misoperation component, which restricts the operation of the opening and closing component when the magnetic door is opened and closed, thereby achieving interlocking between the magnetic door and the opening and closing operation.

[0007] Preferably, the anti-misoperation component includes a magnetic base installed on the inside of the magnetic cabinet door, and a weak magnet is installed on one side of the magnetic base, with the surface of the weak magnet flush with the surface of the magnetic base.

[0008] Preferably, an I-shaped sponge is installed in the middle of the weak magnet, and the I-shaped sponge contains lubricating oil. The magnetic base and the magnetic cabinet door are connected by two pull rods that slide through it.

[0009] Preferably, a pressing plate is installed at one end of the pull rod. The pressing plate can be attracted and cooperate with a weak magnet. A pressing groove is opened on one side of the pressing plate, and the pressing groove corresponds to the end of the transmission plate.

[0010] Preferably, the extrusion groove has a two-section structure design, with the initial section of the extrusion groove being inclined at the same angle as the end of the transmission plate, and the final section of the extrusion groove being straight.

[0011] Preferably, the other ends of the two pull rods are jointly equipped with handles, a limit plate is installed on the pull rod near the handle, and inclined plates are installed on both sides of the limit plate.

[0012] Preferably, the magnetic cabinet door has a slot corresponding to the inclined plate, and the magnetic cabinet door has protruding plates installed on both sides near the slot, with crossbars slidably connected to each protruding plate.

[0013] Preferably, a second return spring is sleeved on the outer wall of one side of the crossbar, a force-bearing shaft is installed on the side of the crossbar near the second return spring, and a baffle is installed on the opposite end of the crossbar.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes a single handle's push-pull action to simultaneously drive the extrusion plate and limit plate via a pull rod. The closing action of the cabinet door is directly transmitted to the opening and closing assembly via the magnetic attraction between a weak magnet and the extrusion plate. The two-section structure of the extrusion groove, combined with the matching extrusion at the end of the transmission plate, causes the transmission plate to slide directionally along the guide rod. The extrusion shaft and curved groove then drive the transmission shaft to rotate, achieving the engagement or disengagement of the moving and stationary contacts. The entire process requires only the operation of the handle to automatically complete the forced sequence of closing the door before closing the circuit breaker and opening the door before opening the circuit breaker. No manual step-by-step operation is required. From a mechanical structure perspective, this invention avoids the risk of misoperation caused by varying skill levels and inadequate adherence to operating procedures, significantly simplifying the operation steps and reducing the difficulty of on-site training and practical application.

[0015] 2. This invention utilizes the inclined plate on the limiting plate and the inclined surface of the force-bearing shaft for transmission cooperation. With the help of the elastic restoring force of the second return spring, the crossbar and the baffle automatically move closer together. This scrapes off excess lubricating oil from the magnetic mating surface and recycles it into the I-shaped sponge for reuse. At the same time, the baffle forms a complete enclosure to shield the weak magnet, preventing environmental dust from adhering and avoiding the weakening of magnetic attraction force due to dust. When the door is opened, the squeezing plate simultaneously squeezes the I-shaped sponge to release lubricating oil, continuously lubricating and reducing resistance on the magnetic mating surface. This solves the problems of dust accumulation and failure of the magnetic surface in conventional locking mechanisms, as well as the problem of asynchronous operation over a long period of time, ensuring the long-term stable and reliable anti-misoperation locking function. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the magnetic cabinet door structure of the present invention in the open state; Figure 2 This is a side sectional view of the magnetic cabinet door structure of the present invention in the closed state; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure of region A; Figure 4 This is a partial structural diagram of the opening and closing component of the present invention; Figure 5 This is a schematic diagram of the anti-misoperation component structure of the magnetic cabinet door in the open state of the present invention; Figure 6 This is a schematic diagram of the magnetic base structure of the present invention; Figure 7 This is a first schematic diagram of the anti-misoperation component structure of the magnetic cabinet door in the closed state of the present invention; Figure 8 This is a second schematic diagram of the anti-misoperation component structure of the magnetic cabinet door in the closed state of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram of the structure of region B.

[0017] In the diagram: 1. Ring main unit; 2. Magnetic door; 3. Upper contact box; 4. Lower contact box; 5. Moving contact; 6. Stationary contact; 701. L-shaped support frame; 702. Drive shaft; 703. Curved groove; 704. First return spring; 705. Guide rod; 706. Transmission plate; 707. Bracket; 708. Extrusion shaft; 801. Magnetic base; 802. Weak magnet; 803. I-shaped sponge; 804. Pull rod; 805. Extrusion plate; 806. Extrusion groove; 807. Handle; 808. Limiting plate; 809. Inclined plate; 810. Retention groove; 811. Protruding plate; 812. Crossbar; 813. Second return spring; 814. Force-bearing shaft; 815. Baffle. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] Please see Figures 1-9 The present invention provides a technical solution: a ring main unit with an anti-misoperation interlocking mechanism, comprising a ring main unit body 1, a magnetic door 2 installed on one side of the ring main unit body 1, an upper contact box 3 and a lower contact box 4 installed inside the ring main unit body 1, and a moving contact 5 and a stationary contact 6 respectively installed in the upper contact box 3 and the lower contact box 4.

[0020] In one embodiment of the present invention, the main body 1 of the ring main unit is provided with an opening and closing assembly for driving the engagement and disengagement of the moving contact 5 and the stationary contact 6. The opening and closing assembly includes an L-shaped support frame 701 installed on one side of the main body 1 of the ring main unit. The L-shaped support frame 701 is laterally rotatably connected to a drive shaft 702. The drive shaft 702 is connected to the moving contact 5. A curved groove 703 is provided on one side of the drive shaft 702. A first return spring 704 is connected to one side of the L-shaped support frame 701 and is sleeved on the outer wall of the drive shaft 702. A guide rod 705 is slidably connected to the side of the L-shaped support frame 701 near the drive shaft 702. One end of the guide rod 705 is... A transmission plate 706 is installed, with an inclined end design. A bracket 707 is installed on the upper end of the transmission plate 706, and a pressing shaft 708 is connected to the lower end of the bracket 707. The pressing shaft 708 abuts against the curved groove 703. The other end of the first return spring 704 is connected to the transmission plate 706. The transmission shaft 702 moves through the transmission plate 706. An anti-misoperation component is provided on the magnetic door 2 to restrict the movement of the opening and closing components when the magnetic door 2 is opened and closed, realizing the interlock between the magnetic door 2 and the opening and closing operation. The anti-misoperation component includes a magnetic base 801 installed on the inner side of the magnetic door 2, and a weak magnet 802 is installed on one side of the magnetic base 801. The surface of the weak magnet 802 is flush with the magnetic base 801. An I-shaped sponge 803 is installed in the middle of the weak magnet 802. The I-shaped sponge 803 contains lubricating oil. The magnetic base 801 and the magnetic cabinet door 2 are connected by two sliding rods 804. A pressing plate 805 is installed at one end of each rod 804. The pressing plate 805 can be attracted and cooperate with the weak magnet 802. A pressing groove 806 is opened on one side of the pressing plate 805, which corresponds to the end of the transmission plate 706. The pressing groove 806 has a two-section structure design. The initial section of the pressing groove 806 is inclined, and the inclination angle is the same as that of the end of the transmission plate 706. The end of the extrusion groove 806 is straight. The other ends of the two pull rods 804 are connected to handles 807. A limit plate 808 is installed on the side of the pull rod 804 near the handle 807. Inclined plates 809 are installed on both sides of the limit plate 808. The magnetic cabinet door 2 is provided with a retention groove 810 corresponding to the inclined plate 809. The magnetic cabinet door 2 is provided with convex plates 811 on both sides near the retention groove 810. A crossbar 812 is slidably connected to each convex plate 811. A second return spring 813 is sleeved on the outer wall of one side of the crossbar 812. A force-bearing shaft 814 is installed on the side of the crossbar 812 near the second return spring 813. A baffle 815 is installed on the opposite end of the crossbar 812. In the initial state, the magnetic door 2 is open, the moving contact 5 and the stationary contact 6 remain separated, the first return spring 704 is in a naturally extended state, the pressing plate 805 is attracted to the weak magnet 802, the second return spring 813 is in a compressed state, and the baffle 815 opens to both sides. The opening and closing components and the anti-misoperation components are all in their initial positions. When closing the door, the operator holds the handle 807 and rotates the magnetic door 2 towards the ring main unit 1 to close it. The handle 807 drives the pressing plate 805 to slide along the magnetic door 2 and the magnetic base 801 through the pull rod 804. The pressing plate 805 and the weak magnet 802 remain attracted to each other, and the pressing plate 805 in turn drives the magnetic base 801 and the magnetic door 2 to rotate synchronously. After the magnetic door 2 and the main body 1 of the ring network cabinet are closed, the handle 807 is continuously squeezed inward. The handle 807 drives the limit plate 808 to move closer to the magnetic door 2 through the pull rod 804. The limit plate 808 drives the inclined plate 809 to move synchronously. The inclined plate 809 gradually disengages from the force shaft 814. The second return spring 813 and the force shaft 814 lose the squeezing of the inclined plate 809 and then return to their original positions. The returned force shaft 814 pushes the crossbar 812 to slide along the convex plate 811 towards the middle. The crossbar 812 drives the baffle 815 to move closer to each other. The baffle 815 scrapes off the excess lubricating oil from the magnetic attraction surface of the weak magnet 802 and the squeezing plate 805 and pushes it back to both sides of the I-shaped sponge 803. The I-shaped sponge 803 recycles and absorbs the lubricating oil. Among them, the limiting plate 808 and the inclined plate 809 form a linkage transmission structure, which drives the force shaft 814 and the crossbar 812 to move synchronously through the push and pull of the handle 807, thereby realizing the opening and closing control of the baffle 815. Simultaneously, the baffles 815 move closer together to completely cover the weak magnet 802, preventing dust from adhering to its surface and avoiding the problem of decreased adsorption force and difficulty in closing the door due to long-term operation in the closed state. As the pull rod 804 moves, it drives the extrusion plate 805 and extrusion groove 806 to press against the end of the transmission plate 706. The inclined initial section of the extrusion groove 806 first presses against the end of the transmission plate 706 and pushes the transmission plate 706 to move. The straight section of the extrusion groove 806 then fully adheres to the transmission plate 706, combined with the stretched first... The return spring 704 achieves mechanical locking. The compressed transmission plate 706 slides directionally along the L-shaped support frame 701 via the guide rod 705, while simultaneously stretching the first return spring 704. The movement of the transmission plate 706 drives the bracket 707 and the compression shaft 708 to move synchronously. The compression shaft 708 compresses the curved groove 703 on the transmission shaft 702, forcing the transmission shaft 702 to rotate around its own axis. The rotating transmission shaft 702 drives the moving contact 5 to rotate synchronously, so that the moving contact 5 engages with the stationary contact 6, achieving the anti-misoperation locking effect of closing the door before powering on. The first reset spring 704 provides elastic reset force to the transmission plate 706, ensuring that the opening and closing assembly quickly returns to the initial state of opening after the lockout is released; the guide rod 705 provides directional guidance to the transmission plate 706, avoiding swaying and jamming when the transmission plate 706 moves, and improving the smoothness of the opening and closing action. When the door is opened, the operator pulls the handle 807 outward. The handle 807 drives the pull rod 804, the limit plate 808, and the pressing plate 805 to slide in the opposite direction along the magnetic cabinet door 2 and the magnetic base 801. The pressing groove 806 on the pressing plate 805 gradually disengages from the end of the transmission plate 706, and the first return spring 704 then returns to its original position, pulling the transmission plate 706, the bracket 707, and the pressing shaft 708 back to their initial positions. The pressing shaft 708 presses the curved groove 703 in the opposite direction, driving the transmission shaft 702 to rotate and return to its original position. The transmission shaft 702 then drives the moving contact 5 to separate from the stationary contact 6, completing the circuit tripping action. During the movement of the handle 807 and the limit plate 808, the limit plate 808 drives the inclined plate 809 to press the force shaft 814. The force shaft 814 drives the crossbar 812 and the baffle 815 along the convex... The plate 811 moves to both sides and simultaneously squeezes the second reset spring 813, causing the baffle 815 to disengage from the blocking limit of the weak magnet 802. At this time, the squeezing plate 805 and the weak magnet 802 maintain an adsorption fit. The squeezing plate 805 simultaneously squeezes the I-shaped sponge 803 in the middle of the weak magnet 802, squeezing out the lubricating oil adsorbed inside the I-shaped sponge 803, and lubricating the magnetic attraction surface of the weak magnet 802 and the squeezing plate 805 to reduce the wear and jamming of the magnetic attraction fit. Continuously pull the handle 807, and the squeezing plate 805 abuts against the magnetic base 801 and the magnetic cabinet door 2. At this time, the magnetic attraction force between the magnetic cabinet door 2 and the ring main unit 1 is greater than the external pulling force. Only after the moving contact 5 and the stationary contact 6 are completely separated can the magnetic cabinet door 2 be pulled to open, realizing the anti-misoperation door locking function of opening the door after the circuit breaker is opened. Among them, the anti-misoperation component and the opening and closing component form a mechanical interlock, strictly implementing the operation logic of closing the door before closing the circuit breaker and opening the door before opening the circuit breaker, thus eliminating the safety risks of opening the door or closing the circuit breaker while the ring main unit is energized from a structural perspective.

[0021] Working principle: In the initial state, the magnetic door 2 is open, the moving contact 5 and the stationary contact 6 are separated, the first return spring 704 is in a naturally extended state, the pressing plate 805 is attracted and engaged with the weak magnet 802, the second return spring 813 is in a compressed state, the baffle 815 is opened to both sides, and the opening and closing components and the anti-misoperation components are both in the initial position. When closing the door, the operator holds the handle 807 and rotates the magnetic cabinet door 2 toward the ring main unit 1 to close it. The handle 807 drives the pressing plate 805 to slide along the magnetic cabinet door 2 and the magnetic base 801 through the pull rod 804. The pressing plate 805 and the weak magnet 802 maintain an adsorption fit. The pressing plate 805 then drives the magnetic base 801 and the magnetic cabinet door 2 to rotate synchronously, completing the closure of the magnetic cabinet door 2 and the ring main unit 1. After closing, the handle 807 is continuously pressed inward. The handle 807 drives the limit plate 808 to move closer to the magnetic cabinet door 2 via the pull rod 804. The limit plate 808 drives the inclined plate 809 to move synchronously. The inclined plate 809 gradually disengages from the force shaft 814. The second return spring 813 and the force shaft 814 lose the pressure of the inclined plate 809 and thus return to their original positions. The returned force shaft 814 pushes the crossbar 812 to slide along the convex plate 811 towards the middle. The crossbar 812 drives the baffles 815 to move closer to each other. The baffles 815 scrape off the excess lubricating oil from the magnetic attraction surface of the weak magnet 802 and the pressing plate 805 and push it back to both sides of the I-shaped sponge 803. The I-shaped sponge 803 recycles and adsorbs the lubricating oil. At the same time, the baffles 815 move closer to each other to completely cover the weak magnet 802, preventing dust from adhering to the surface of the weak magnet 802 and avoiding the problem of reduced adsorption force of the weak magnet 802 and difficulty in closing the door due to long-term operation in the closed state. As the lever 804 moves, it drives the pressing plate 805 and the pressing groove 806 to press against the end of the transmission plate 706. The inclined initial section of the pressing groove 806 first presses against the end of the transmission plate 706 and pushes the transmission plate 706 to move. The straight section of the pressing groove 806 then fully presses against the transmission plate 706. With the help of the stretched first return spring 704, mechanical locking is achieved. The compressed transmission plate 706 slides along the L-shaped support frame 701 through the guide rod 705, while stretching the first return spring 704. The movement of the transmission plate 706 drives the bracket 707 and the pressing shaft 708 to move synchronously. The pressing shaft 708 presses against the curved groove 703 on the transmission shaft 702, forcing the transmission shaft 702 to rotate around its own axis. The rotating transmission shaft 702 drives the moving contact 5 to rotate synchronously, so that the moving contact 5 meshes with the stationary contact 6, achieving the anti-misoperation locking effect of closing the door before powering on.

[0022] When the door is opened, the operator pulls the handle 807 outward. The handle 807 drives the pull rod 804, the limit plate 808, and the pressing plate 805 to slide in the opposite direction along the magnetic door 2 and the magnetic base 801. The pressing groove 806 on the pressing plate 805 gradually separates from the end of the transmission plate 706, and the first return spring 704 then returns to its original position, pulling the transmission plate 706, the bracket 707, and the pressing shaft 708 back to their initial positions. The pressing shaft 708 presses the curved groove 703 in the opposite direction, driving the transmission shaft 702 to rotate and return to its original position. The transmission shaft 702 then drives the moving contact 5 to separate from the stationary contact 6, completing the circuit tripping action. During the movement of the handle 807 and the limiting plate 808, the limiting plate 808 drives the inclined plate 809 to press the force shaft 814. The force shaft 814 drives the crossbar 812 and the baffle 815 to move to both sides along the convex plate 811, while simultaneously pressing the second reset spring 813, causing the baffle 815 to disengage from the blocking limit of the weak magnet 802. At this time, the pressing plate 805 and the weak magnet 802 maintain an adsorption fit. The pressing plate 805 simultaneously presses the I-shaped sponge 803 in the middle of the weak magnet 802, squeezing out the lubricating oil adsorbed inside the I-shaped sponge 803, and lubricating the magnetic attraction surfaces of the weak magnet 802 and the pressing plate 805, reducing wear and jamming of the magnetic attraction fit. Pull the handle 807 continuously, and the pressing plate 805 will contact the magnetic base 801 and the magnetic cabinet door 2. At this time, the magnetic attraction force between the magnetic cabinet door 2 and the main body 1 of the ring network cabinet is greater than the external pulling force. Only after the moving contact 5 and the stationary contact 6 are completely separated can the magnetic cabinet door 2 be pulled to open, so as to realize the anti-misoperation door locking function of opening the door after the circuit breaker is opened.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A ring main unit with an anti-misoperation interlocking mechanism, comprising a ring main unit body (1), wherein a magnetic door (2) is installed on one side of the ring main unit body (1), and an upper contact box (3) and a lower contact box (4) are installed inside the ring main unit body (1), wherein a moving contact (5) and a stationary contact (6) are respectively installed in the upper contact box (3) and the lower contact box (4), characterized in that: The main body (1) of the ring main unit is provided with an opening and closing component for driving the engagement and disengagement of the moving contact (5) and the stationary contact (6); The opening and closing assembly includes an L-shaped support frame (701) installed on one side of the main body (1) of the ring main unit. The L-shaped support frame (701) is laterally rotatably connected to a drive shaft (702). The drive shaft (702) is connected to a moving contact (5). A curved groove (703) is provided on one side of the drive shaft (702). A first return spring (704) is connected to one side of the L-shaped support frame (701), and the first return spring (704) is sleeved on the outer wall of the drive shaft (702). The L-shaped support frame (701) is close to the drive shaft. (702) A guide rod (705) is slidably connected to one side. A transmission plate (706) is installed at one end of the guide rod (705). The end of the transmission plate (706) is designed to be inclined. A bracket (707) is installed at the upper end of the transmission plate (706). An extrusion shaft (708) is connected to the lower end of the bracket (707). The extrusion shaft (708) abuts against the curved groove (703). The other end of the first reset spring (704) is connected to the transmission plate (706). The transmission shaft (702) moves through the transmission plate (706). The magnetic cabinet door (2) is equipped with an anti-misoperation component, which is used to restrict the operation of the opening and closing component when the magnetic cabinet door (2) is opened and closed, so as to realize the interlock between the magnetic cabinet door (2) and the opening and closing operation.

2. A ring main unit with an anti-misoperation interlocking mechanism according to claim 1, characterized in that: The anti-misoperation component includes a magnetic base (801) installed inside the magnetic cabinet door (2), and a weak magnet (802) is installed on one side of the magnetic base (801), with the surface of the weak magnet (802) flush with the magnetic base (801).

3. A ring main unit with an anti-misoperation interlocking mechanism according to claim 2, characterized in that: The weak magnet (802) has an I-shaped sponge (803) installed in the middle. The I-shaped sponge (803) contains lubricating oil. The magnetic base (801) and the magnetic cabinet door (2) are connected by two pull rods (804).

4. A ring main unit with an anti-misoperation interlocking mechanism according to claim 3, characterized in that: One end of the pull rod (804) is equipped with a pressing plate (805), which can be attracted and cooperate with a weak magnet (802). A pressing groove (806) is provided on one side of the pressing plate (805), and the pressing groove (806) corresponds to the end of the transmission plate (706).

5. A ring main unit with an anti-misoperation interlocking mechanism according to claim 4, characterized in that: The extrusion groove (806) is designed with a two-section structure. The initial section of the extrusion groove (806) is inclined and the inclination angle is the same as that of the end of the transmission plate (706). The final section of the extrusion groove (806) is straight.

6. A ring main unit with an anti-misoperation interlocking mechanism according to claim 5, characterized in that: The other ends of the two pull rods (804) are jointly equipped with handles (807), and a limit plate (808) is installed on the side of the pull rod (804) near the handle (807). Inclined plates (809) are installed on both sides of the limit plate (808).

7. A ring main unit with an anti-misoperation interlocking mechanism according to claim 6, characterized in that: The magnetic cabinet door (2) has a slot (810) on the inclined plate (809). The magnetic cabinet door (2) has protruding plates (811) installed on both sides near the slot (810). A crossbar (812) is slidably connected to each protruding plate (811).

8. A ring main unit with an anti-misoperation interlocking mechanism according to claim 7, characterized in that: A second return spring (813) is sleeved on the outer wall of one side of the crossbar (812). A force-bearing shaft (814) is installed on the side of the crossbar (812) near the second return spring (813). A baffle (815) is installed on the opposite end of the crossbar (812).

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