A mechanical interlocking structure for grounding switch and isolating switch
By designing a mechanical interlocking structure in the power equipment, ensuring that the grounding switch and the isolating switch are closed at the same time, the problems of manual operation error and large operating resistance under high voltage are solved, and the reliability and service life of the equipment are improved.
Patent Information
- Application Number
- CN201910986322.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-10-17
AI Technical Summary
In the power transmission and distribution system, the closing action of the high-voltage isolating switch and the high-voltage grounding switch mainly relies on manual operation, which is prone to simultaneous closing due to mechanical misoperation. The traditional sliding locking method leads to a large additional load on the rotating shaft and increases the operating resistance. Large, easy to cause stagnation.
A mechanical interlocking structure is designed to realize the mechanical interlocking between the ground switch and the isolating switch through the locking link, the locking plate, the rotating rod, the limiting pin and other components, ensuring that at least one part is always in the open state and avoiding the simultaneous closing. The gate is optimized through long-distance interlocking mechanism and adjustable connecting rods, sliders and support devices to reduce operating resistance and extend service life.
It effectively avoids the phenomenon of simultaneous closing caused by human misoperation, reduces the additional load and operating resistance of the rotating shaft, and extends the service life of the equipment.
Smart Images
Figure CN110729150B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electric power equipment, and in particular to a mechanical interlocking structure between a grounding switch and an isolating switch. Background Art
[0002] In the power transmission and distribution system, outdoor high-voltage disconnectors and outdoor high-voltage grounding switches are often used in combination. During the use of high-voltage disconnectors and high-voltage grounding switches, the main switch of the disconnector and the ground switch of the grounding switch cannot be closed at the same time. At present, the closing action of the main switch of the disconnector and the ground switch of the ground switch mainly relies on manual closing. This closing method may cause the two to be closed at the same time due to human mechanical misoperation.
[0003] At present, the locking between the moving side main switch and the moving side ground switch and the static side ground switch of the traditional horizontal telescopic disconnector with a voltage level of 550kV and above usually adopts a sliding method. In this method, the friction between the lock plate and the connecting plate is large, and the resistance to the rotating shaft is large, which will generate a large additional load on the rotation of the motor. Especially with the increase of voltage level, in order to ensure the reliability of locking, the weight of the long locking rod increases exponentially, and the operating resistance increases. The limit pin, lock plate and lock plate are prone to deformation and then jamming after long-term operation. Summary of the invention
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a mechanical interlocking structure for a grounding switch and an isolating switch, which can realize the mechanical interlocking between the grounding switch and the isolating switch, so that the main switch of the isolating switch and the ground switch of the grounding switch will not be closed at the same time.
[0005] The technical solution adopted by the present invention is: a mechanical interlocking structure between a grounding switch and an isolating switch, comprising:
[0006] A locking connecting plate, wherein the left and right ends of the locking connecting plate are respectively provided with a first limit pin and a second limit pin;
[0007] a first locking disk device, the first locking disk device is located on the inner side of the first limiting pin, the first locking disk device comprises a first locking disk and a first rotating rod arranged at the axis of the first locking disk, the first rotating rod is drivingly connected to the grounding knife of the grounding switch, an outer edge of the first locking disk is provided with an arc-shaped opening, and the first limiting pin is located on the rotation path of the outer edge of the first locking disk;
[0008] The second locking disk device is located on the inner side of the second limit pin, the second locking disk device includes a second locking disk and a second rotating rod arranged at the axis of the second locking disk, the second rotating rod is transmission-connected to the main knife of the isolating switch, the outer edge of the second locking disk is provided with an arc-shaped opening, and the second limit pin is located on the rotation path of the outer edge of the second locking disk.
[0009] Further optimization includes a remote interlocking mechanism, which includes a long locking rod, a connecting plate and a third locking disk device, one end of the connecting plate is connected to an end of the locking connecting plate away from the second locking disk device through the long locking rod, and the other end of the connecting plate is provided with a third limit pin;
[0010] The third lock disk device includes a third lock disk and a third rotating rod arranged on the axis of the third lock disk. The third rotating rod is transmission-connected to the ground knife of a remotely arranged grounding switch. The outer edge of the third lock disk is provided with an arc-shaped opening, and the third limit pin is located on the rotation path of the outer edge of the third lock disk.
[0011] Further optimized, the two ends of the long locking rod are respectively connected to the connecting plate and the locking connecting plate through connecting rods with adjustable length.
[0012] Further optimization, the two connecting rods each include a slide plate and an adjustable bolt, one end of the adjustable bolt is connected to one end of the slide plate, the other end of the adjustable bolt is connected to one end of the long locking rod, and the other ends of the two slide plates are respectively connected to the connecting plate and the locking connecting plate.
[0013] Further optimization is provided at both ends of the long locking rod, and the supporting device includes a supporting plate and an adjusting plate, the adjusting plate is installed on the supporting plate in an adjustable position, the adjusting plate is provided with a supporting through hole, the slide plate is passed through the supporting through hole, a wear-reducing sleeve is mounted on the supporting screw, and the supporting screw is located under the slide plate for supporting the slide plate.
[0014] Beneficial effects of the present invention: The present invention is used for a mechanical interlocking structure between a grounding switch and an isolating switch, which can ensure that at least one of the grounding switch's grounding knife and the isolating switch's main knife is always in an open state, and can prevent both from entering a closed state at the same time, thereby preventing mechanical misoperation due to human intervention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.
[0016] Figure 1 It is a front view of the mechanical interlocking structure between the grounding switch and the isolating switch of the present invention;
[0017] Figure 2 is a top view of a mechanical interlocking structure between a grounding switch and an isolating switch according to the present invention;
[0018] Figure 3 yes Figure 1 A magnified structural diagram of the medium and long distance interlocking mechanism;
[0019] Figure 4 It is a schematic diagram of the front structure of the supporting structure;
[0020] Figure 5 yes Figure 4 Cross-sectional view along CC direction;
[0021] Figure 6 It is a structural schematic diagram in which the grounding switch and the main switch of the isolating switch are both in the open state;
[0022] Figure 7 It is a structural diagram showing that the grounding switch of the grounding switch is in the closed state and the main switch of the isolating switch is in the open state;
[0023] Figure 8 It is a structural diagram in which the grounding switch of the grounding switch is in the open state and the main switch of the isolating switch is in the closed state. DETAILED DESCRIPTION
[0024] like Figure 1 and Figure 2 In the embodiment shown, the mechanical interlocking structure between the grounding switch and the isolating switch comprises:
[0025] A locking link plate 100, wherein the left and right ends of the locking link plate 100 are respectively provided with a first limit pin 110 and a second limit pin 120;
[0026] A first locking disk device, the first locking disk device is located on the inner side of the first limiting pin 110, the first locking disk device comprises a first locking disk 210 and a first rotating rod 220 arranged at the axis of the first locking disk 210, the first rotating rod 220 is drivingly connected to the grounding knife of the grounding switch, an arc-shaped opening is provided at the outer edge of the first locking disk 210, and the first limiting pin 110 is located on the rotation path of the outer edge of the first locking disk 210;
[0027] The second locking disk device is located on the inner side of the second limit pin 120. The second locking disk device includes a second locking disk 310 and a second rotating rod 320 arranged on the axis of the second locking disk 310. The second rotating rod 320 is connected to the main knife of the isolating switch. The outer edge of the second locking disk 310 is provided with an arc opening. The second limit pin 120 is located on the rotation path of the outer edge of the second locking disk 310.
[0028] like Figure 6As shown, when the grounding switch and the isolating switch are both in the open position, the first limit pin 110 and the second limit pin 120 are respectively aligned with the center of the arc-shaped notch of the first locking disk 210 and the second locking disk 310. At this time, the left and right sliding of the locking link plate 100 is not restricted in any way, and the first rotating rod 220 and the second rotating rod 320 can also rotate freely.
[0029] like Figure 7 As shown, as the grounding switch of the grounding switch starts to close, the first rotating rod 220 rotates accordingly, and the first locking disk 210 integrated with the first rotating rod 220 rotates synchronously. During the rotation process, the first limit pin 110 moves along the outer edge of the first locking disk 210. Because of the arc-shaped notch on the outer edge of the first locking disk 210, when the first limit pin 110 enters the arc edge from the arc-shaped notch, it will push the first limit pin 110 to move to the left, and then pull the locking link plate 100 to translate to the left, so that the second limit pin 120 enters the arc-shaped opening of the second locking disk 310. After the second limit pin 120 enters the arc-shaped opening of the second locking disk 310, the second locking disk 310 cannot rotate at this time.
[0030] like Figure 8 As shown, when the first lock disk 210 continues to rotate, the second lock disk 310 can only rotate when the first limit pin 110 is aligned with the arc-shaped opening position of the first lock disk 210. As the second lock disk 310 rotates, the locking link plate 100 translates to the right, so that the first limit pin 110 enters the arc-shaped opening of the first lock disk 210. After the first limit pin 110 enters the arc-shaped opening of the first lock disk 210, the first lock disk 210 cannot rotate.
[0031] Through the above design, when the grounding switch or the isolating switch is closing, only the first lock disk 210 or the second lock disk 310 can rotate, and the two cannot close at the same time. Therefore, the possibility of the grounding switch and the isolating switch closing at the same time due to human error operation can be avoided, thereby achieving the purpose of mutual mechanical interlocking.
[0032] like Figure 1 and Figure 3 As shown, it also includes a remote interlocking mechanism, which includes a long locking rod 400, a connecting plate 500 and a third locking disk device. One end of the connecting plate 500 is connected to an end of the locking connecting plate 100 away from the second locking disk device through the long locking rod 400, and a third limiting pin 510 is provided on the other end of the connecting plate 500.
[0033] The third locking disk device includes a third locking disk 610 and a third rotating rod 620 arranged at the axis of the third locking disk 610. The third rotating rod 620 is transmission connected to the ground knife of the grounding switch set remotely. The outer edge of the third locking disk 610 is provided with an arc opening, and the third limit pin 510 is located on the rotation path of the outer edge of the third locking disk 610.
[0034] In the power transmission and distribution system, another grounding switch is often used at a distance far from the main switch. At this time, the movement of the locking connecting plate 100 is transmitted to the connecting plate 500 through the long locking rod 400, and the interlocking action with the main switch is completed through the third locking disk device and the third limit pin 510. Thus, the main switch and the long-distance ground switch are interlocked. From this, we can know that when the entire mechanism needs to interlock more ground switches with the main switch, more ground switches can be interlocked with the main switch according to the above design.
[0035] The two ends of the long locking rod 400 are connected to the connecting plate 500 and the locking connecting plate 100 respectively through the length-adjustable connecting rod. Due to the influence of the processing error of the parts and the installation process, sometimes the position of each limit pin and the lock plate is not reasonable, and the distance between the two is too close or too far. When the position relationship between the limit pin and the lock plate is not reasonable, the position relationship between the limit pin and the lock plate is adjusted by adjusting the length of the connecting rod at both ends of the long locking rod 400, thereby avoiding the influence of the processing error of the parts on the locking stability of the product.
[0036] Furthermore, both connecting rods include a slide plate 710 and an adjustable bolt 720, one end of the adjustable bolt 720 is connected to one end of the slide plate 710, the other end of the adjustable bolt 720 is connected to one end of the long locking rod 400, and the other ends of the two slide plates 710 are respectively connected to the connecting plate 500 and the locking connecting plate 100. The threads of the two adjustable bolts 720 are rotated in opposite directions. When the length of the connecting rod needs to be adjusted, the adjustable bolt 720 is rotated to adjust the positional relationship between the limit pin and the locking plate until the positions of the two meet the standard.
[0037] like Figure 1 , Figure 4 and Figure 5 As shown, both ends of the long locking rod 400 are provided with supporting devices, and the supporting devices include a supporting plate 810 and an adjusting plate 820. The adjusting plate 820 is installed on the supporting plate 810 in an adjustable position. The adjusting plate 820 is provided with a supporting through hole 821. The slide plate 710 is inserted into the supporting through hole 821. A supporting screw 900 is horizontally arranged in the supporting through hole 821. The supporting screw 900 is located below the slide plate 710 and is used to support the slide plate 710. A friction-reducing sleeve 910 is mounted on the supporting screw 900.
[0038] As the voltage level increases, in order to ensure the reliability of locking, the weight of the long locking rod 400 increases exponentially, the operating resistance increases, and the lock disk requires a large torque to push the long locking rod 400 to move horizontally. After long-term operation, the limit pin, lock disk, etc. are prone to deformation and subsequent jamming.
[0039] The present application adopts a supporting device to support the long locking rod 400, and the weight of the long locking rod 400, the slide plate 710, etc. is supported by the supporting screw 900, and a wear-reducing sleeve 910 is mounted on the supporting screw 900. When the long locking rod 400 translates the supporting screw 900, the slide plate 710 and the wear-reducing sleeve 910 are in rolling friction, thereby greatly reducing the thrust of the long locking rod 400 during the translation process, reducing the force required by the lock plate to push the limit pin, and greatly extending the service life of the entire structure.
[0040] Furthermore, the adjustment plate 820 can be installed on the support plate 810 in an adjustable position, and the installation height of the adjustment plate 820 can be adjusted according to different installation requirements. Due to the existence of dimensional error, if the adjustment plate 820 is installed on the support plate 810 in a fixed installation position, it may not be installed or get stuck.
[0041] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A mechanical interlocking structure between a grounding switch and an isolating switch, characterized in that: include: A locking connecting plate (100), wherein the left and right ends of the locking connecting plate (100) are respectively provided with a first limiting pin (110) and a second limiting pin (120); A first locking disk device, the first locking disk device is located on the inner side of the first limiting pin (110), the first locking disk device comprises a first locking disk (210) and a first rotating rod (220) arranged at the axis of the first locking disk (210), an arc-shaped opening is arranged at the outer edge of the first locking disk (210), the first limiting pin (110) is located on the rotating path of the outer edge of the first locking disk (210), and the first rotating rod (220) is used for transmission connection with the grounding knife of the grounding switch; A second locking disk device, the second locking disk device is located on the inner side of the second limiting pin (120), the second locking disk device comprises a second locking disk (310) and a second rotating rod (320) arranged at the axis of the second locking disk (310), an outer edge of the second locking disk (310) is provided with an arc-shaped opening, the second limiting pin (120) is located on the rotation path of the outer edge of the second locking disk (310), and the second rotating rod (320) is used for transmission connection with the main switch of the isolating switch; It also includes a long-distance interlocking mechanism, which includes a long locking rod (400), a connecting plate (500) and a third locking disk device. One end of the connecting plate (500) is connected to the end of the locking connecting plate (100) away from the second locking disk device through the long locking rod (400). The other end of the connecting plate (500) is provided with a third limit pin (510). The third locking disk device includes a third locking disk (610) and a third rotating rod (620) arranged at the axis of the third locking disk (610). The outer edge of the third locking disk (610) is provided with an arc-shaped opening, and the third limit pin (510) is located on the rotation path of the outer edge of the third locking disk (610).
2. The mechanical interlocking structure between the grounding switch and the isolating switch according to claim 1, characterized in that: The two ends of the long locking rod (400) are respectively connected to the connecting plate (500) and the locking connecting plate (100) through connecting rods with adjustable lengths.
3. The mechanical interlocking structure between the grounding switch and the isolating switch according to claim 2 is characterized in that: The two connecting rods each include a slide plate (710) and an adjustable bolt (720), one end of the adjustable bolt (720) is connected to one end of the slide plate (710), the other end of the adjustable bolt (720) is connected to one end of the long locking rod (400), and the other ends of the two slide plates (710) are respectively connected to the connecting plate (500) and the locking connecting plate (100).
4. The mechanical interlocking structure between the grounding switch and the isolating switch according to claim 3 is characterized in that: Support devices are provided at both ends of the long locking rod (400), and the support devices include a support plate (810) and an adjustment plate (820). The adjustment plate (820) is installed on the support plate (810) in an adjustable position. The adjustment plate (820) is provided with a support through hole (821). The slide plate (710) is inserted into the support through hole (821). A support screw (900) is horizontally provided in the support through hole (821). A wear-reducing sleeve (910) is mounted on the support screw (900). The support screw (900) is located below the slide plate (710) and is used to support the slide plate (710).