Valve mechanism in-place detection system for open switch cabinet

Abstract

The invention discloses a valve mechanism in-place detection system for an open switch cabinet, and relates to the technical field of switch cabinet valves, the valve mechanism in-place detection system comprises a substrate, the bottom end of the substrate is connected with a mounting track, and the left and right sides of the substrate are both provided with guide rods; a valve mechanism is jointly arranged on the outer side of the upper contact and the outer side of the lower contact, a connecting rod is arranged on the rear side of the base plate, an encoder shaft is movably connected to the outer surface of the connecting rod, an encoder is connected to the other end of the encoder shaft, and a PLC control module is connected to the outer surface of the encoder through an electric wire. Hall sensors are arranged on the outer sides of the two guide rods, and magnetic marks are preset on the outer surfaces of the two guide rods. A series of structures are arranged, multi-sensor redundancy check is utilized, the false alarm rate is reduced, high precision and reliability are improved, the self-adaptive algorithm is compatible with different conditions, manual intervention is reduced, meanwhile, misoperation is effectively prevented through a real-time interlocking mechanism, and electric power safety specifications are met.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear safety technology, specifically to a door mechanism positioning detection system for open switchgear. Background Technology

[0002] The operational status of high-voltage switchgear is crucial to the safety and stability of the power system. Faults can lead to significant economic losses and endanger the lives of maintenance and repair personnel. Currently, maintenance personnel use automatic control devices for the forward and backward movement of the switchgear trolley. However, due to issues with the gate mechanism getting stuck in the automated equipment, the gate is prone to deformation or even damage, and in severe cases, the switchgear structure can be damaged, resulting in a high failure rate. Furthermore, when components inside the cabinet malfunction and require repair, insufficient distance from live parts poses a personal safety hazard.

[0003] If the valve mechanism fails to operate properly due to jamming or damage during the power supply process of the switch trolley, it will cause a power supply delay, putting pressure on the power company. Since the stationary contacts on the busbar side of the switchgear are energized when the 10kV busbar is not de-energized, maintenance personnel often install insulating baffles in front of the valve mechanism to isolate the energized parts. However, there is still a risk of metal parts accidentally falling into the energized area, posing a significant threat to the safety of workers. Traditional KYN28 switchgear valve mechanism position detection relies mainly on mechanical limits or manual visual judgment, which has obvious shortcomings. Therefore, a valve mechanism position detection system for open switchgear is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a door mechanism positioning detection system for open switchgear, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a door mechanism positioning detection system for an open switch cabinet, comprising a base plate, a mounting rail connected to the bottom end of the base plate, guide rods mounted on both the left and right sides of the base plate, with the bottom ends of the guide rods fixedly connected to the mounting rail, and upper and lower contacts mounted on the upper and lower ends of the front surface of the base plate, respectively. A valve mechanism is provided on the outer side of the upper and lower contacts, and a sealing detection component is provided on the outer surface of the valve mechanism. A connecting rod is provided on the rear side of the base plate. An encoder shaft is movably connected to the outer surface of the connecting rod, and an encoder is connected to the other end of the encoder shaft. A PLC control module is connected to the outer surface of the encoder by wires. Hall sensors are provided on the outer sides of both guide rods, and magnetic marks are pre-set on the outer surfaces of both guide rods.

[0006] Preferably, the valve mechanism includes an upper valve, a lower valve, and a slider. The upper valve and the lower valve are located at the upper and lower ends of the front side of the substrate, respectively. Sliders are fixedly installed on the left and right end surfaces of the upper valve and the lower valve, and the sliders are movably sleeved on the outer surface of the guide rod.

[0007] Preferably, the length of the upper and lower valves is greater than the length of the upper and lower contacts, and the upper and lower valves are the same size.

[0008] Preferably, vibration sensors are installed on the lower surface of the upper valve and the upper surface of the lower valve, and displacement sensors are installed on the outer surfaces of the plurality of sliders.

[0009] Preferably, there are two connecting rods, and the two connecting rods are respectively connected to the rear end surfaces of the upper and lower valves.

[0010] Preferably, the PLC control module includes a housing, a mounting panel, and a touch screen. The housing is connected to the outside of the encoder via wires. The mounting panel is mounted on the front surface of the housing, and the touch screen is embedded in the outer surface of the mounting panel.

[0011] Preferably, multiple Hall sensors are evenly distributed from top to bottom on the outer sides of both guide rods, and the Hall sensors are not in contact with the guide rods.

[0012] Preferably, the sealing detection assembly includes a sealing plate and a thin-film pressure sensor. The sealing plate is provided both below the upper valve and above the lower valve, and multiple sealing plates are respectively connected to multiple sliders. A thin-film pressure sensor is installed inside each of the multiple sealing plates.

[0013] Preferably, the thin-film pressure sensor is embedded in an array inside the sealing plate, and the sealing plates on the left and right sides of the upper valve correspond to the sealing plates on the left and right sides of the lower valve, respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This door mechanism positioning detection system for open switchgear uses the swing of the linkage to drive the encoder shaft to rotate during routine maintenance and testing, continuously outputting the position data of the door mechanism. These signals are processed by the PLC control module and trigger the five-prevention interlocking logic. Once the displacement deviation is detected to exceed the set range, the system will activate the locking electromagnet to prevent the trolley from moving further or the circuit breaker from closing.

[0015] This door mechanism positioning detection system for open switchgear utilizes Hall effect sensors and magnetic markers. It generates redundant verification signals by exploiting changes in the position of the magnetic markers on the guide rod. For example, when the door mechanism closes, the magnetic marker enters the sensing area of ​​the Hall effect sensor array, triggering a positioning confirmation signal. To enhance anti-interference capabilities, differential signal processing is introduced to effectively suppress electromagnetic interference caused by high-voltage equipment, ensuring the stability and reliability of the Hall effect sensor output signal. Furthermore, the Hall effect sensor is non-contact with the guide rod, preventing misjudgments caused by mechanization in dusty or humid environments. Redundant safety verification, combined with encoder displacement data and Hall effect sensor signals, achieves dual-channel verification, preventing safety vulnerabilities caused by the failure of a single sensor.

[0016] This door mechanism positioning detection system for open switchgear uses a thin-film pressure sensor embedded in the door sealing assembly to monitor the contact pressure when the door mechanism closes in real time. When the pressure is lower than a set threshold, it is determined that the closure is not tight, triggering an alarm and blocking subsequent operations. The sealing performance is linked to the pressure data and partial discharge detection. If the door mechanism closing pressure is insufficient, resulting in enhanced partial discharge, the system automatically activates the insulation compensation mechanism to ensure the reliability of physical closure. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the upper and lower contact capping structure of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a schematic diagram of the valve mechanism structure of the present invention; Figure 5 This is a schematic diagram of the Hall sensor structure of the present invention; Figure 6 This is a schematic diagram of the sealing detection mechanism of the present invention; Figure 7 This is a schematic diagram of the layout structure of the thin-film pressure sensor of the present invention; Figure 8 This is a schematic diagram of the PLC control module structure of the present invention; Figure 9 This is a schematic diagram of the control flow logic of the present invention.

[0018] In the diagram: 1. Base plate; 2. Mounting rail; 3. Guide rod; 4. Upper contact; 5. Lower contact; 6. Valve mechanism; 601. Upper valve; 602. Lower valve; 603. Slider; 7. Vibration sensor; 8. Displacement sensor; 9. Connecting rod; 10. Encoder; 11. Encoder shaft; 12. PLC control module; 1201. Housing; 1202. Mounting panel; 1203. Touch screen; 13. Magnetic marker; 14. Hall sensor; 15. Sealing detection assembly; 1501. Sealing plate; 1502. Thin-film pressure sensor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example

[0021] like Figures 1 to 9 As shown, this embodiment of a door mechanism positioning detection system for an open switch cabinet includes a base plate 1. The bottom end of the base plate 1 is connected to a mounting rail 2. Guide rods 3 are installed on both the left and right sides of the base plate 1, and the bottom ends of the guide rods 3 are fixedly connected to the mounting rail 2. The guide rods 3 are vertically arranged and used as sliding guide components. The upper contact 4 and the lower contact 5 are respectively installed on the upper and lower ends of the front surface of the base plate 1. A valve mechanism 6 is provided on the outer side of the upper contact 4 and the lower contact 5, and a sealing detection component 15 is provided on the outer surface of the valve mechanism 6. The valve mechanism 6 is used to seal the upper contact 4 and the lower contact 5. A connecting rod 9 is provided on the rear side of the base plate 1. An encoder shaft 11 is movably connected to the outer surface of the connecting rod 9, and an encoder 10 is connected to the other end of the encoder shaft 11. The outer surface of the encoder 10 is wired to a PLC control module 12. The swing of the connecting rod 9 drives the encoder shaft 11 to rotate, continuously outputting the position data of the valve mechanism 6. These signals are processed by the PLC control module 12 and trigger the five-proof interlocking logic. Once the displacement deviation is detected to exceed the set range, the system will activate the locking electromagnet to prevent the handcart from continuing to move or the circuit breaker from closing. Hall sensors 14 are installed on the outer sides of both guide rods 3, and magnetic marks 13 are pre-set on the outer surface of both guide rods 3. Multiple Hall sensors 14 are installed on both sides of the guide rods 3. Redundancy verification signals are generated by the change in the position of the magnetic marks 13 on the guide rods 3. For example, when the valve mechanism 6 is closed, the magnetic marks 13 enter the sensing area of ​​the Hall sensor 14 array, thereby triggering the position confirmation signal. At the same time, in order to enhance the anti-interference capability, differential signal processing method can be introduced to effectively suppress electromagnetic interference caused by high voltage equipment and ensure the stability and reliability of the output signal of the Hall sensor 14.

[0022] Furthermore, the valve mechanism 6 includes an upper valve 601, a lower valve 602, and a slider 603. The upper valve 601 and the lower valve 602 are located at the upper and lower ends of the front side of the substrate 1, respectively. Slider 603 is fixedly installed on the left and right end surfaces of the upper valve 601 and the lower valve 602, and the slider 603 is movably sleeved on the outer surface of the guide rod 3. By sliding the slider 603, the upper valve 601 and the lower valve 602 are driven to move stably, thereby realizing the opening and closing of the entire valve mechanism 6.

[0023] Furthermore, the length of both the upper valve 601 and the lower valve 602 is greater than the length of the upper contact 4 and the lower contact 5, and the upper valve 601 and the lower valve 602 have the same structural size. This ensures that when the upper valve 601 and the lower valve 602 are connected to close the entire valve mechanism 6, the upper contact 4 and the lower contact 5 can be stably sealed.

[0024] Furthermore, vibration sensors 7 are installed on the lower surface of the upper valve 601 and the upper surface of the lower valve 602, and displacement sensors 8 are installed on the outer surfaces of the multiple sliders 603. The vibration sensors 7 detect the vibration signals when the valve mechanism 6 moves, which are used to analyze the status. The displacement sensors 8 can monitor the moving distance of the valve mechanism 6.

[0025] Furthermore, there are two connecting rods 9, which are respectively connected to the rear end surfaces of the upper valve 601 and the lower valve 602, and the connecting rods 9 drive the upper valve 601 and the lower valve 602 to move.

[0026] Furthermore, the PLC control module 12 includes a housing 1201, a mounting panel 1202, and a touch screen 1203. The housing 1201 is connected to the outside of the encoder 10 via wires. The mounting panel 1202 is mounted on the front surface of the housing 1201, and the touch screen 1203 is embedded in the outer surface of the mounting panel 1202. The PLC control module 12 integrates a fuzzy algorithm and a communication module to process multi-source signals and output control commands. The touch screen 1203 provides users with a visual interface for real-time data, status, and historical information, records and allows querying of past data for trend analysis.

[0027] Furthermore, multiple Hall sensors 14 are evenly distributed from top to bottom on the outer sides of both guide rods 3, and the Hall sensors 14 are not in contact with the guide rods 3. In high dust or humid environments, the non-contact characteristic of the Hall sensors 14 avoids misjudgment caused by mechanization. Redundant safety verification, combined with the displacement data of the encoder 10 and the signal of the Hall sensor 14, realizes dual-channel verification to prevent safety vulnerabilities caused by the failure of a single sensor.

[0028] Furthermore, the sealing detection assembly 15 includes a sealing plate 1501 and a thin-film pressure sensor 1502. The sealing plate 1501 is provided below the upper valve 601 and above the lower valve 602, and multiple sealing plates 1501 are respectively connected to multiple sliders 603. The thin-film pressure sensor 1502 is installed inside each of the multiple sealing plates 1501. The thin-film pressure sensor 1502 is embedded in the valve sealing assembly to monitor the contact pressure when the valve mechanism 6 is closed in real time. When the pressure is lower than the set threshold, it is determined that the closure is not tight, triggering an alarm and locking subsequent operations. The sealing performance is linked with the pressure data and the partial discharge detection. If the closing pressure of the valve mechanism 6 is insufficient, resulting in enhanced partial discharge, the system automatically starts the insulation compensation mechanism to ensure the reliability of physical closure.

[0029] Furthermore, the thin-film pressure sensor 1502 is embedded in an array inside the sealing plate 1501, and the sealing plates 1501 on the left and right sides of the upper valve 601 correspond to the sealing plates 1501 on the left and right sides of the lower valve 602, respectively. The thin-film pressure sensor 1502 addresses the limitations of traditional displacement detection by directly assessing the actual contact between the valve and the contactor, providing preventative maintenance support. By analyzing pressure change trends, it predicts the aging cycle of the sealing material, thereby optimizing maintenance strategies.

[0030] The usage method of this embodiment is as follows: When the upper valve 601 and lower valve 602 in the valve mechanism 6 move, the encoder 10 records the angle and position changes of the connecting rod 9, the Hall sensor 14 detects the position of the magnetic mark 13, and the thin film pressure sensor 1502 feeds back the contact force between the upper valve 601 and lower valve 602 when the valve mechanism 6 is closed. The PLC control module 12 performs state determination to judge the valve mechanism 6. When the judged state is abnormal, the interlock is triggered in time and an alarm is triggered. At the same time, the data is uploaded to the monitoring platform.

[0031] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A door mechanism positioning detection system for open switchgear, comprising a base plate (1), characterized in that: The bottom end of the substrate (1) is connected to the mounting rail (2), and guide rods (3) are installed on both the left and right sides of the substrate (1). The bottom end of the guide rods (3) is fixedly connected to the mounting rail (2). The upper contact (4) and lower contact (5) are respectively installed on the upper and lower ends of the front surface of the substrate (1). A valve mechanism (6) is provided on the outer side of the upper contact (4) and the lower contact (5), and a sealing detection component (15) is provided on the outer surface of the valve mechanism (6). A connecting rod (9) is provided on the rear side of the base plate (1). An encoder shaft (11) is movably connected to the outer surface of the connecting rod (9), and an encoder (10) is connected to the other end of the encoder shaft (11). A PLC control module (12) is wired to the outer surface of the encoder (10). Hall sensors (14) are provided on the outer side of both guide rods (3), and magnetic marks (13) are preset on the outer surface of both guide rods (3).

2. The door mechanism positioning detection system for open switchgear according to claim 1, characterized in that: The valve mechanism (6) includes an upper valve (601), a lower valve (602) and a slider (603). The upper valve (601) and the lower valve (602) are located at the upper and lower ends of the front side of the substrate (1), respectively. The slider (603) is fixedly installed on the left and right ends of the upper valve (601) and the lower valve (602), and the slider (603) is movably sleeved on the outer surface of the guide rod (3).

3. The door mechanism positioning detection system for open switchgear according to claim 2, characterized in that: The length of the upper valve (601) and the lower valve (602) is greater than the length of the upper contact (4) and the lower contact (5), and the upper valve (601) and the lower valve (602) have the same structural size.

4. The door mechanism positioning detection system for open switchgear according to claim 2, characterized in that: Vibration sensors (7) are installed on the lower surface of the upper valve (601) and the upper surface of the lower valve (602), and displacement sensors (8) are installed on the outer surfaces of the plurality of sliders (603).

5. The door mechanism positioning detection system for open switchgear according to claim 1, characterized in that: There are two connecting rods (9), and the two connecting rods (9) are respectively connected to the rear end surfaces of the upper valve (601) and the lower valve (602).

6. The door mechanism positioning detection system for open switchgear according to claim 1, characterized in that: The PLC control module (12) includes a housing (1201), a mounting panel (1202), and a touch screen (1203). The housing (1201) is connected to the outside of the encoder (10) by wires. The mounting panel (1202) is mounted on the front surface of the housing (1201), and the touch screen (1203) is embedded in the outer surface of the mounting panel (1202).

7. The door mechanism positioning detection system for open switchgear according to claim 1, characterized in that: The Hall sensors (14) are distributed at equal intervals from top to bottom on the outer sides of the two guide rods (3), and the Hall sensors (14) are not in contact with the guide rods (3).

8. The door mechanism positioning detection system for open switchgear according to claim 1, characterized in that: The sealing detection assembly (15) includes a sealing plate (1501) and a thin film pressure sensor (1502). The sealing plate (1501) is provided below the upper valve (601) and above the lower valve (602). Multiple sealing plates (1501) are connected to multiple sliders (603) respectively. The thin film pressure sensor (1502) is installed inside each of the multiple sealing plates (1501).

9. The door mechanism positioning detection system for open switchgear according to claim 8, characterized in that: The thin-film pressure sensor (1502) is embedded in the array inside the sealing plate (1501), and the sealing plates (1501) on the left and right sides of the upper valve (601) correspond to the sealing plates (1501) on the left and right sides of the lower valve (602).

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