Grounding knife-switch device

Abstract

The utility model relates to a grounding knife-switch device, and relates to the technical field of grounding knife-switch opening and closing. The grounding knife-switch device comprises a knife-switch assembly and a knife-switch opening and closing assembly. The disconnecting link assembly comprises a support, a chopper and an operating rod. The fodder chopper comprises a hinge end which is hinged to the support, and the fodder chopper can rotate along the hinge axis. And the operating rod is connected with the hinged end. The disconnecting link opening and closing assembly comprises an input shaft, an output shaft and a speed reduction transmission assembly. The input shaft is in transmission connection with the speed-reducing transmission assembly, one end of the output shaft is in transmission connection with the speed-reducing transmission assembly, the other end of the output shaft is connected with the operating rod, and the rotating speed of the input shaft is larger than that of the output shaft. According to the grounding knife-switch device provided by the embodiment of the invention, the opening and closing operation of the grounding knife-switch can be realized with a small force, the operation is simple and convenient, and the switching efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding knife switch opening and closing, in particular to a grounding knife switch device. Background Art

[0002] Grounding switches are widely used in power generation, transmission, and transformation. Some of these grounding switches have special structures, concealed installation locations, and simple and crude grounding switch operating rods. As a result, operators need to exert a relatively large force when performing the corresponding switching operation, which places certain requirements on the physical fitness of the operators. At the same time, the switching operation is time-consuming, labor-intensive, and inefficient.

[0003] In the patent application document with application number CN201510982311.7, an all-in-one outdoor grounding knife switch operating rod is disclosed. By setting a basic rod and an adapter component at the end of the basic rod, the adapter component is provided with a sleeve portion and an actuating rod, and the outer diameter of the actuating rod corresponds to the aperture of the actuating hole of the grounding knife switch. The basic rod cooperates with the adapter component through the sleeve portion, and then the actuating rod of the adapter component is used to link the grounding knife switch to perform an opening and closing action, thereby achieving the purpose of operating the outdoor grounding knife switch. Although the problem that the grounding knife switch is inconvenient for operators to handle the corresponding switching process due to its special structure and hidden installation position has been solved, it still requires the operator to apply a large force to complete the opening and closing operation. Utility Model Content

[0004] The utility model provides a grounding knife switch device, which can realize the opening and closing operations of the grounding knife switch with relatively small force, and the operation is simple and convenient, thereby effectively improving the switching efficiency.

[0005] An embodiment of the present application provides a grounding knife switch device, comprising: a knife switch assembly, comprising a bracket, a shearing blade and an operating rod, the shearing blade comprising a hinged end, the hinged end being hinged to the bracket, and the shearing blade being able to rotate along the hinged axis, and the operating rod being connected to the hinged end; a knife switch opening and closing assembly, comprising an input shaft, an output shaft and a reduction transmission assembly, the input shaft being transmission-connected to the reduction transmission assembly, one end of the output shaft being transmission-connected to the reduction transmission assembly, and the other end of the output shaft being connected to the operating rod, and the rotational speed of the input shaft being greater than the rotational speed of the output shaft.

[0006] According to the aforementioned embodiment of the present application, the reduction transmission assembly includes a driving gear, a driven gear, and a transmission gear set arranged between the driving gear and the driven gear, the input shaft is coaxially arranged with the driving gear, and the output shaft is coaxially arranged with the driven gear.

[0007] According to any of the aforementioned embodiments of the present application, the transmission assembly includes a first gear group and a second gear group, the first gear group includes a first gear and a second gear arranged coaxially, and the second gear group includes a third gear and a fourth gear arranged coaxially, wherein the driving gear is meshed with the first gear, the second gear is meshed with the third gear, and the fourth gear is meshed with the driven gear.

[0008] According to any of the aforementioned implementations of the embodiments of the present application, the transmission ratio between the driving gear and the driven gear is in the range of 1:35-1:55.

[0009] According to any of the aforementioned embodiments of the present application, the grounding knife switch device also includes a connecting sleeve, the connecting sleeve having a first end and a second end along its own axial direction, the first end is detachably connected to the output shaft, and the end face of the second end is provided with a recessed portion extending along its own axial direction, and the recessed portion is cooperatively connected to the operating rod.

[0010] According to any of the aforementioned embodiments of the present application, the grounding knife switch device also includes a shell and a ratchet limit assembly, the reduction transmission assembly is arranged in the shell, the ratchet limit assembly is installed on the input shaft or the output shaft, and the ratchet limit assembly is connected to the shell, and the ratchet limit assembly is used to limit the one-way rotation of the input shaft or the output shaft.

[0011] According to any of the aforementioned embodiments of the present application, the ratchet limiting assembly includes a ratchet, a pawl and an outer sleeve, the ratchet is coaxially arranged on the input shaft, the outer sleeve is sleeved on the ratchet, the outer sleeve is fixedly connected to the shell, one end of the pawl is hinged to the inner circumference of the outer sleeve, and the other end of the pawl abuts against the ratchet.

[0012] According to any of the aforementioned implementations of the embodiments of the present application, it also includes a lifting component, which is connected to the knife gate opening and closing component to drive the knife gate opening and closing component to rise and fall.

[0013] According to any of the aforementioned implementations of the embodiments of the present application, the lifting assembly includes a lifting platform, a base, a lifting rod assembly, and nuts and screw rods that cooperate with each other. The knife switch opening and closing assembly is arranged on the lifting platform, the screw rod is rotatably connected to the lifting platform, one end of the lifting rod assembly is hinged to the nut, and the other end of the lifting rod assembly is hinged to the base.

[0014] According to any of the aforementioned implementations of the embodiments of the present application, the grounding knife switch device further includes a disc-shaped rotating handle, which is installed on the input shaft.

[0015] An embodiment of the present application provides a grounding knife switch device, comprising: a knife switch assembly, comprising a bracket, a shearing blade and an operating rod, the shearing blade comprising a hinged end, the hinged end being hinged to the bracket, and the shearing blade being able to rotate along the hinged axis, and the operating rod being connected to the hinged end; a knife switch opening and closing assembly, comprising an input shaft, an output shaft and a reduction transmission assembly, the input shaft being transmission-connected to the reduction transmission assembly, one end of the output shaft being transmission-connected to the reduction transmission assembly, and the other end of the output shaft being connected to the operating rod, and the rotational speed of the input shaft being greater than the rotational speed of the output shaft.

[0016] According to the grounding knife switch device of the embodiment of the present application, the input shaft can be rotated so that the input shaft drives the output shaft to rotate through the reduction transmission assembly. The transmission assembly converts the high-speed and low-torque power of the input shaft into the low-speed and high-torque power of the output shaft. The output shaft drives the operating lever to rotate. The rotation of the operating lever enables the shearing blade to rotate relative to its own hinge axis, thereby releasing or separating the shearing blade from the contact and completing the opening and closing operations of the grounding knife switch. During the operation process, the operator can achieve the opening and closing operations of the grounding knife switch with less force, effectively improving the switching efficiency as well as the safety and stability of the switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0018] Figure 1 This is a structural diagram of a grounding knife switch device according to an embodiment of the present application, omitting the knife switch assembly from one perspective;

[0019] Figure 2 This is a structural diagram of the grounding knife switch device of the previous embodiment of the present application after omitting the knife switch assembly from another perspective;

[0020] Figure 3 This is a structural schematic diagram from another perspective of the grounding knife switch device in the previous embodiment of the present application after the knife switch component is omitted.

[0021] Reference numerals:

[0022] 100 - knife gate opening and closing assembly; 10 - input shaft; 20 - output shaft; 30 - reduction transmission assembly; 31 - driving gear; 32 - driven gear; 33 - transmission gear set; 331 - first gear set; 331a - first gear; 331b - second gear; 332 - second gear set; 332a - third gear; 332b - fourth gear;

[0023] 200-connecting sleeve; 300-housing; 400-ratchet limit assembly; 500-lifting assembly; 600-rotating handle. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] The utility model provides a grounding knife switch device, which can realize the opening and closing operations of the grounding knife switch with relatively small force, and the operation is simple and convenient, thereby effectively improving the switching efficiency.

[0026] Figure 1 This is a structural diagram of a grounding knife switch device according to an embodiment of the present application, omitting the knife switch assembly from one perspective;

[0027] Figure 2 This is a structural diagram of the grounding knife switch device of the previous embodiment of the present application after omitting the knife switch assembly from another perspective;

[0028] Figure 3 This is a structural diagram of the grounding knife switch device of the previous embodiment of the present application after the knife switch component is omitted from another perspective. Figure 1-3 As shown, an embodiment of the present application provides a grounding knife switch device. The grounding knife switch device includes a knife switch assembly and a knife switch opening and closing assembly 100. The knife switch assembly includes a bracket, a guillotine and an operating rod. The guillotine includes a hinged end, which is hinged to the bracket, and the guillotine can rotate along the hinge axis. The operating rod is connected to the hinged end. The knife switch opening and closing assembly 100 includes an input shaft 10, an output shaft 20 and a reduction transmission assembly 30. The input shaft 10 is transmission-connected to the reduction transmission assembly 30, one end of the output shaft 20 is transmission-connected to the reduction transmission assembly 30, and the other end of the output shaft 20 is connected to the operating rod, and the rotation speed of the input shaft 10 is greater than the rotation speed of the output shaft 20.

[0029] It should be noted that the grounding knife switch device in this embodiment is a high-voltage grounding knife switch device. The knife switch assembly is generally arranged in a high-voltage cabinet. In order to ensure the safety of the grounding knife switch during opening and closing, one end of the operating lever is connected to the hinged end of the guillotine in the high-voltage cabinet, and the other end extends out of the high-voltage cabinet. By operating the operating lever, the guillotine and the contact are separated and contacted, and finally the switching operation is completed. In this embodiment, by rotating the operating lever, the guillotine can be rotated along its own hinge axis, thereby separating and contacting the guillotine and the contact, that is, opening and closing the grounding knife switch.

[0030] It can be understood that the reduction transmission assembly 30 can convert the high-speed and low-torque power of the input shaft 10 into the low-speed and high-torque power of the output shaft 20. The reduction transmission assembly 30 can be a chain transmission assembly or a gear transmission assembly, or it can be other structures that can realize the conversion of speed and torque between the input shaft 10 and the output shaft 20. This is not limited here.

[0031] According to the grounding knife switch device of the embodiment of the present application, the input shaft 10 can be rotated so that the input shaft 10 drives the output shaft 20 to rotate through the reduction transmission assembly 30. The transmission assembly converts the high-speed and low-torque power of the input shaft 10 into the low-speed and high-torque power of the output shaft 20. The output shaft 20 drives the operating lever to rotate. The rotation of the operating lever enables the guillotine to rotate relative to its own hinge axis, thereby releasing or separating the guillotine from the contact and completing the opening and closing operations of the grounding knife switch. During the operation process, the operator can achieve the opening and closing operations of the grounding knife switch with less force, effectively improving the switching efficiency as well as the safety and stability of the switching process.

[0032] like Figure 1-3 As shown, in some embodiments, the reduction transmission assembly 30 includes a driving gear 31, a driven gear 32, and a transmission gear set 33 disposed between the driving gear 31 and the driven gear 32. The input shaft 10 is coaxially disposed with the driving gear 31, the output shaft 20 is coaxially disposed with the driven gear 32, and the number of teeth of the driving gear 31 is greater than the number of teeth of the driven gear 32.

[0033] In this embodiment, when the input shaft 10 drives the driving gear 31 to rotate, the teeth of the driving gear 31 mesh with the gears of the transmission gear set 33, thereby driving the gears in the transmission gear set 33 to rotate in sequence. The transmission gear set 33 gradually decelerates the power and increases the torque during the transmission process. Finally, the transmission gear set 33 transmits the power to the driven gear 32, and the driven gear 32 drives the operating rod to rotate through the output shaft 20, so that the operating rod drives the guillotine to rotate relative to its own hinge axis and release or separate from the contact to complete the opening and closing operation of the grounding knife switch. The reduction transmission assembly 30 achieves an efficient deceleration and torque increase effect through a multi-stage gear transmission design, meeting the requirements for speed and torque under different working conditions. At the same time, the multi-stage gear transmission and precise gear meshing design ensure the smoothness of the transmission, reduce vibration and noise, and improve the operating quality of the equipment. The gear transmission also has the beneficial effects of compact structure, smooth transmission, and long life.

[0034] like Figure 1-3As shown, in some embodiments, the transmission assembly includes a first gear set 331 and a second gear set 332. The first gear set 331 includes a first gear 331a and a second gear 331b arranged coaxially. The second gear set 332 includes a third gear 332a and a fourth gear 332b arranged coaxially. The driving gear 31 is meshed with the first gear 331a, the second gear 331b is meshed with the third gear 332a, and the fourth gear 332b is meshed with the driven gear 32. The number of teeth of the first gear 331a is greater than the number of teeth of the driving gear 31, and the number of teeth of the first gear 331a is less than the number of teeth of the second gear 331b, the number of teeth of the third gear 332a is greater than the number of teeth of the fourth gear 332b, and the number of teeth of the third gear 332a is greater than the number of teeth of the second gear 331b.

[0035] It should be noted that the first gear 331a has more teeth than the driving gear 31. When the driving gear 31 rotates, due to the difference in gear ratio, the first gear 331a rotates at a slower speed, thus achieving a first-stage deceleration effect. The second gear 331b has fewer teeth than the third gear 332a, and the transmission process from the second gear 331b to the third gear 332a also achieves deceleration. The third gear 332a has more teeth than the fourth gear 332b, and the third gear 332a also has more teeth than the second gear 331b, resulting in further deceleration between the third gear 332a and the fourth gear 332b. As the output of the second gear set 332, the fourth gear 332b has a significantly reduced speed and a corresponding increase in torque. Through multi-stage gear transmission and precise gear ratio, a smooth transmission of deceleration and torque increase is achieved.

[0036] In this embodiment, when the input shaft 10 drives the driving gear 31 to rotate, the power is gradually transmitted to the driven gear 32 through a multi-stage gear transmission. In each stage of transmission, due to the design differences in the gear ratio, the speed gradually decreases and the torque gradually increases. Finally, the driven gear 32 drives the output shaft 20 to rotate at a lower speed and higher torque, thereby driving the opening and closing operations of the grounding knife switch device. Through multi-stage gear transmission and precise tooth ratio, efficient deceleration transmission of power is achieved, and the output torque is significantly increased while decelerating, meeting the grounding knife switch device's demand for large torque. Precise gear meshing ensures the smoothness of the transmission and reduces vibration and noise. At the same time, the coaxially arranged gear set makes the transmission component compact and occupies little space.

[0037] like Figure 1-3As shown, in some embodiments, the transmission ratio of the driving gear 31 to the driven gear 32 is in the range of 1:35-1:55. When the transmission ratio of the driving wheel to the driven wheel is in the range of 1:35-1:55, the preferred transmission ratio is 1:40. Within this range, when the operator operates, a relatively normal applied force can be applied to the input shaft 10, which can provide the driving gear 31, the driven gear 32 and the transmission gear set 33 to convert the applied force into a suitable output torque, and complete the opening and closing operation of the shearing cutter through the output torque. At the same time, within the range of this transmission ratio, the gear's load-bearing capacity, transmission efficiency and overall stability of the system are better.

[0038] like Figure 1-3 As shown, in some embodiments, the grounding switch device further includes a connecting sleeve 200. The connecting sleeve 200 has a first end and a second end along its own axial direction. The first end is detachably connected to the output shaft 20. The end surface of the second end is provided with a recessed portion extending along its own axial direction, and the recessed portion is cooperatively connected to the operating rod.

[0039] In this embodiment, the first end is detachably connected to the output shaft 20, making the connecting sleeve easy to install, maintain, and replace, improving the flexibility and maintainability of the device. The end surface of the second end is provided with a recessed portion extending along its axis. The shape and size of the recessed portion must match the operating lever to ensure a tight and reliable connection. The connecting sleeve 200 is responsible for transmitting power from the output shaft 20 to the operating lever, thereby driving the grounding switch device to open and close. This connecting sleeve 200 improves the overall performance of the grounding switch device.

[0040] like Figure 1-3 As shown, in some embodiments, the grounding knife switch device further includes a housing 300 and a ratchet limiter assembly 400. The reduction transmission assembly 30 is disposed within the housing 300, and the ratchet limiter assembly 400 is mounted on the input shaft 10 or the output shaft 20 and connected to the housing 300. The ratchet limiter assembly 400 is used to limit the input shaft 10 or the output shaft 20 to unidirectional rotation.

[0041] In this embodiment, the housing 300 provides protection for the reduction gear assembly 30, ensuring it can withstand a variety of harsh operating environments. The ratchet limiter assembly 400 primarily restricts the input shaft 10 or output shaft 20 to unidirectional rotation, preventing the operating lever from rebounding during opening and closing operations, potentially endangering personnel and equipment. This enhances the safety and reliability of the grounding switch.

[0042] like Figure 1-3As shown, in some embodiments, the ratchet limit assembly 400 includes a ratchet, a pawl and an outer sleeve. The ratchet is coaxially arranged on the input shaft 10, the outer sleeve is sleeved on the ratchet, and the outer sleeve is fixedly connected to the housing 300. One end of the pawl is hinged to the inner circumference of the outer sleeve, and the other end of the pawl abuts against the ratchet.

[0043] In this embodiment, the outer circumference of the ratchet has a plurality of tooth grooves. The ratchet is coaxially arranged on the input shaft 10 and rotates as the input shaft 10 rotates. The outer sleeve is sleeved on the outside of the ratchet and is fixedly connected to the housing 300, ensuring that the outer sleeve remains stationary relative to the housing 300. One end of the pawl is hinged to the inner circumference of the outer sleeve, and the other end of the pawl abuts the ratchet. The outer sleeve provides a hinge point for the pawl. When the input shaft 10 rotates in a predetermined direction, the pawl will rotate with the ratchet and be embedded in the tooth grooves of the ratchet. If the input shaft 10 rotates in the reverse direction, the pawl will be blocked by the ratchet teeth and cannot move further, thereby limiting the reverse rotation of the input shaft 10.

[0044] like Figure 1-3 As shown, in some embodiments, the grounding knife switch device further includes a lifting assembly 500. The lifting assembly 500 is connected to the knife switch opening and closing assembly 100 to drive the knife switch opening and closing assembly 100 to rise and fall. In this embodiment, the lifting assembly 500 can be adjusted to move the knife switch opening and closing assembly 100 to a specified position for opening and closing operations. This allows the knife switch opening and closing assembly 100 to operate knife switch assemblies at different heights to complete knife switch opening and closing operations, thereby improving work efficiency and safety, and enhancing the flexibility and reliability of the device.

[0045] like Figure 1-3 As shown, in some embodiments, the lifting assembly 500 includes a lifting platform, a base, a lifting rod assembly, and a nut and a screw rod that cooperate with each other. The knife gate opening and closing assembly 100 is arranged on the lifting platform, the screw rod is rotatably connected to the lifting platform, one end of the lifting rod assembly is hinged to the nut, and the other end of the lifting rod assembly is hinged to the base.

[0046] It should be noted that in this embodiment, the lifting rod assembly is an X-shaped scissor rod assembly, which is composed of multiple scissor rods connected by hinges or pins, forming an overall X-shaped structure. A scissor rod is composed of two or more rods connected by hinge points. Due to the symmetry of the X-shaped structure, the scissor rods maintain parallel movement during rotation, thereby ensuring that the supported or lifted object can rise or fall smoothly.

[0047] In this embodiment, when the lead screw rotates, the nut moves along the screw's threaded direction. Because the nut is hinged to one end of the lift rod assembly, and the other end of the lift rod assembly is hinged to the base, the movement of the nut causes the lift rod assembly to deform, driving the lift platform vertically. This allows the knife gate opening and closing assembly to reach the desired position as the lift platform rises and falls.

[0048] like Figure 1-3 As shown, in some embodiments, the grounding knife switch device further includes a disc-shaped rotating handle 600, which is mounted on the input shaft. Rotating the disc-shaped rotating handle 600 causes the input shaft to rotate accordingly, thereby controlling the opening and closing of the knife switch. The disc-shaped rotating handle 600 can be securely mounted on the input shaft using fasteners (such as bolts, nuts, etc.). Furthermore, the disc-shaped rotating handle 600 can be made of insulating material or have an insulating layer on the outside to reduce the risk of direct contact with high-voltage components, thereby improving safety during operation.

[0049] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A grounding switch device, characterized in that: include: The knife switch assembly includes a bracket, a guillotine and an operating rod, wherein the guillotine includes a hinged end, the hinged end is hinged to the bracket, and the guillotine can rotate along the hinge axis, and the operating rod is connected to the hinged end; The knife switch opening and closing assembly includes an input shaft, an output shaft and a reduction transmission assembly. The input shaft is transmission-connected to the reduction transmission assembly, one end of the output shaft is transmission-connected to the reduction transmission assembly, and the other end of the output shaft is connected to the operating rod. The rotational speed of the input shaft is greater than the rotational speed of the output shaft.

2. The grounding switch device according to claim 1, characterized in that: The reduction transmission assembly includes a driving gear, a driven gear, and a transmission gear set arranged between the driving gear and the driven gear. The input shaft is coaxially arranged with the driving gear, and the output shaft is coaxially arranged with the driven gear.

3. The grounding switch device according to claim 2, characterized in that: The transmission assembly includes a first gear set and a second gear set, the first gear set includes a first gear and a second gear arranged coaxially, and the second gear set includes a third gear and a fourth gear arranged coaxially, wherein the driving gear is engaged with the first gear, the second gear is engaged with the third gear, and the fourth gear is engaged with the driven gear.

4. The grounding switch device according to claim 2 or 3, characterized in that: The transmission ratio between the driving gear and the driven gear ranges from 1:35 to 1:

55.

5. The grounding switch device according to claim 1, characterized in that: The grounding knife switch device also includes a connecting sleeve, which has a first end and a second end along its own axial direction. The first end is detachably connected to the output shaft, and the end face of the second end is provided with a recessed portion extending along its own axial direction, and the recessed portion is cooperatively connected to the operating rod.

6. The grounding switch device according to claim 1, characterized in that: The grounding knife switch device also includes a shell and a ratchet limit assembly. The reduction transmission assembly is arranged in the shell. The ratchet limit assembly is installed on the input shaft or the output shaft, and the ratchet limit assembly is connected to the shell. The ratchet limit assembly is used to limit the one-way rotation of the input shaft or the output shaft.

7. The grounding switch device according to claim 6, characterized in that: The ratchet limiting assembly includes a ratchet, a pawl and an outer sleeve. The ratchet is coaxially arranged on the input shaft, the outer sleeve is sleeved on the ratchet, the outer sleeve is fixedly connected to the housing, one end of the pawl is hinged to the inner circumference of the outer sleeve, and the other end of the pawl abuts against the ratchet.

8. The grounding switch device according to claim 1, characterized in that: It also includes a lifting component, which is connected to the knife gate opening and closing component to drive the knife gate opening and closing component to rise and fall.

9. The grounding switch device according to claim 7, characterized in that: The lifting assembly includes a lifting platform, a base, a lifting rod assembly, and a nut and a screw rod that cooperate with each other. The knife gate opening and closing assembly is arranged on the lifting platform. The screw rod is rotatably connected to the lifting platform. One end of the lifting rod assembly is hinged to the nut, and the other end of the lifting rod assembly is hinged to the base.

10. The grounding switch device according to claim 1, characterized in that: The grounding knife switch device further includes a disc-shaped rotating handle, which is mounted on the input shaft.

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