Fast ground switch device

Abstract

The application discloses a quick grounding switch device, which directly sets a moving contact seat as a conductive structure, extends the moving contact seat to electrically connect with a grounding assembly, and makes a moving contact head penetrating through a first mounting hole of the moving contact seat contact with an inner wall of the first mounting hole, so that the moving contact seat can play a positioning and supporting role and a conductive role, and the moving contact head can directly realize effective electric connection with the grounding assembly through the moving contact seat, which is simpler in structure and more convenient to install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a kind of quick grounding switch device. BACKGROUND

[0002] For the environment-friendly GIS equipment using environment-friendly air insulation, the quick grounding switch device is an important component thereof, and with the increasing requirement of power system on power quality, higher requirement is also proposed for high-voltage electrical equipment. The existing quick grounding switch generally includes a moving contact and a static contact, and the gear rack or screw nut transmission mode is used to drive the moving contact to move away from or close to the static contact to realize the opening and closing of the moving contact and the static contact. This transmission mode results in a large overall volume of the quick grounding device and a relatively complex structure. In addition, in order to guide the moving contact to move in a straight line, a moving contact seat is generally configured for each moving contact, and the moving contact is arranged in the corresponding moving contact seat. In addition, in order to realize the effective electrical connection between the moving contact and the grounding terminal, a star-shaped contact is generally installed in the moving contact seat, and a conductive sheet is installed between the star-shaped contact and the grounding terminal, so that the star-shaped contact can be electrically connected with the moving contact and the corresponding grounding terminal respectively. The structure is relatively complex and the installation process is high. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a kind of quick grounding switch device, which is more simple in structure and convenient to install.

[0004] The quick grounding switch device according to the embodiment of the present application comprises: a shell having a mounting cavity; three groups of movable contact assembly arranged side by side in the shell, each movable contact assembly comprising a movable contact seat and a movable contact, the movable contact seat being fixedly installed in the shell and having a first mounting hole arranged in the up-down direction, the movable contact being movably installed in the first mounting hole and being movable along the up-down direction; three groups of static contact assembly arranged below the three groups of movable contact assembly; a driving mechanism comprising a driving device, a rotating shaft and a transmission assembly, the driving device being arranged outside the shell, the rotating shaft being in transmission connection with the driving device and extending into the mounting cavity, the transmission assembly being in transmission connection between the rotating shaft and the three groups of movable contact, the driving device being capable of driving the rotating shaft to rotate and driving the movable contact to move along the up-down direction to approach or move away from the corresponding static contact assembly; a grounding assembly arranged in the shell; wherein the movable contact seat is of a conductive structure and extends to be electrically connected with the grounding assembly, the movable contact is in contact with the inner wall of the first mounting hole and is electrically connected with the grounding assembly through the movable contact seat; a bearing is arranged between the rotating shaft and the shell, a shaft sleeve is arranged on the outer side of the bearing, and a third sealing ring is arranged in the shaft sleeve and in abutment with the shell of the driving device; a third annular groove is arranged on the inner side surface of the third sealing ring, a fourth annular groove is arranged on the outer side surface of the third sealing ring, a fifth annular groove is arranged around the third annular groove on the inner side wall of the fourth annular groove, and an annular elastic ring is arranged in the fifth annular groove; a third protruding part is arranged on the outer surface of the shaft sleeve along the circumferential direction of the sealing groove, the third protruding part is embedded in the third annular groove, and the annular elastic ring is sleeved around the outer periphery of the third annular groove and makes the third protruding part and the third annular groove in interference fit.

[0005] The quick grounding switch device according to the embodiment of the present application has at least the following beneficial effects:

[0006] In the quick grounding switch device according to the embodiment of the present application, the movable contact seat is directly arranged as a conductive structure, the movable contact seat is extended to be electrically connected with the grounding assembly, and the movable contact passing through the first mounting hole of the movable contact seat is in contact with the inner wall of the first mounting hole, so that the movable contact seat can not only play a positioning and supporting role but also play a conductive role, and the movable contact can directly realize effective electrical connection with the grounding assembly through the movable contact seat, which is not only simpler in structure but also more convenient to install.

[0007] According to some embodiments of the present application, the grounding assembly comprises a grounding copper bar and three grounding terminals corresponding to the moving contact assembly, the shell side wall is provided with second mounting holes corresponding to the grounding terminals, the grounding terminals are arranged in the corresponding second mounting holes, the inner end of the grounding terminal is mounted on the moving contact seat and electrically connected with the moving contact seat, the grounding copper bar is located outside the shell and electrically connected with all the grounding terminals; an insulating sleeve is arranged between each grounding terminal and the inner peripheral wall of the second mounting hole, the insulating sleeve is in interference fit with the grounding terminal, the shell is further provided with a pressing block sleeved on the outer periphery of the grounding terminal, and the insulating sleeve has a sealing portion extending to the outer periphery of the second mounting hole, the sealing portion is arranged between the pressing block and the shell.

[0008] According to some embodiments of the present application, the number of the transmission assemblies is three, each of the transmission assemblies comprises a crank arm and a swing arm, one end of the crank arm is mounted on the rotating shaft, the other end is rotationally connected with the swing arm, and one end of the swing arm away from the crank arm is rotationally mounted on the moving contact head; the rotating shaft can drive the crank arm to rotate and drive the moving contact head to move in the up-down direction through the swing arm.

[0009] According to some embodiments of the present application, the transmission assembly comprises an eccentric wheel and a sliding block, the eccentric wheel is mounted on the rotating shaft and located above the moving contact assembly, the sliding block is mounted between the eccentric wheel and the moving contact assembly, the upper end of the sliding block abuts against the eccentric wheel, and the lower end of the sliding block abuts against all the moving contact heads; a first elastic member is arranged between each moving contact head and the shell or the moving contact seat; when the eccentric wheel rotates downward, the eccentric wheel can push all the moving contact heads to move downward to electrically connect with the stationary contact assembly through the sliding block; when the eccentric wheel moves upward, the first elastic member can push the corresponding moving contact head to move upward to separate from the stationary contact assembly.

[0010] According to some embodiments of the present application, a rolling member is arranged between the sliding block and the eccentric wheel, the upper surface of the sliding block is provided with a mounting groove matched with the rolling member, the rolling member is movably arranged in the mounting groove and protrudes from the upper surface of the sliding block, and the outer peripheral wall of the eccentric wheel abuts against the rolling member and can drive the rolling member to roll in the mounting groove.

[0011] According to some embodiments of the present application, the shell is provided with a third mounting hole, a dynamic sealing disc is mounted in the third mounting hole, the dynamic sealing disc is provided with a sealing hole in communication with the mounting cavity, the rotating shaft is arranged in the sealing hole and extends to the outside of the shell, and the bearing is mounted between the rotating shaft and the inner wall of the sealing groove; wherein the rotating shaft and the peripheral wall of the sealing hole are further provided with a first sealing ring and at least two second sealing rings on the inner side of the bearing, the first sealing ring is an O-shaped sealing ring, the second sealing ring is a lip-shaped sealing ring, all the lip-shaped sealing rings are located on the outside of the O-shaped sealing ring and are arranged in the axial direction of the sealing hole, and a gasket is arranged between every two adjacent lip-shaped sealing rings.

[0012] According to some embodiments of the present application, the lip-shaped sealing ring comprises a body and a skeleton, the body is provided with a fourth mounting hole for the rotating shaft to pass through, one side surface of the body is provided with a first annular groove arranged around the outer periphery of the fourth mounting hole, one side wall of the first annular groove is provided with a second annular groove arranged in the circumferential direction of the first annular groove, the skeleton is mounted in the first annular groove and embedded in the second annular groove, and the body has an extension part extending outward in the axial direction of the body at the outer periphery of the first annular groove; the inner peripheral wall of the fourth mounting hole is provided with a first lip part, a second lip part and a third lip part, the first lip part and the second lip part are located on one side of the third lip part close to the extension part, the radial length of the first lip part and the second lip part is greater than the radial length of the third lip part, the surface of the first lip part and the second lip part is provided with a plurality of annular first protrusions arranged in the radial direction of the fourth mounting hole, and the outer peripheral wall of the body is provided with a second protrusion arranged in the circumferential direction of the body; wherein the first lip part, the second lip part and the third lip part are in interference fit with the rotating shaft, and the second protrusion is in interference fit with the inner peripheral wall of the sealing groove.

[0013] According to some embodiments of the present application, the static contact assembly comprises a static contact seat, a static contact, a petal-shaped contact finger and an isolation cover, the static contact is mounted in the static contact seat, the petal-shaped contact finger is mounted in the static contact seat and arranged around the outer periphery of the static contact, the isolation cover is arranged around the outer periphery of the static contact and the petal-shaped contact finger, and the top wall of the isolation cover is provided with a gap hole for the dynamic contact to pass through; the lower end of the dynamic contact is provided with a plug-in hole matched with the static contact, the lower peripheral edge of the plug-in hole is provided with a guide surface extending outward from top to bottom, the dynamic contact can be moved downward to be clamped between the static contact and the petal-shaped contact finger, the inner peripheral wall of the plug-in hole is in contact with the static contact and electrically connected with the static contact, and the outer peripheral wall of the dynamic contact is in contact with the petal-shaped contact finger and electrically connected with the petal-shaped contact finger.

[0014] According to some embodiments of the present application, the upper surface of the static contact seat is provided with a limiting plate extending to the outside of the static contact seat, the static contact head is arranged in the limiting plate and is mounted on the static contact seat, the petal-shaped contact fingers include a plurality of static contact fingers arranged along the circumference of the static contact head in sequence, each of the static contact fingers is movably arranged in the limiting plate and can move towards or away from the static contact head along the radial direction of the limiting plate, and a second elastic member is arranged between the static contact finger and the limiting plate; a driving block corresponding to each of the static contact fingers is movably mounted on the inner wall of the isolation cover and can move relative to the isolation cover in the up-down direction, a supporting block is protrudingly arranged on the inner wall of the isolation cover below the driving block, and a third elastic member is arranged between the driving block and the supporting block; the side of the driving block close to the static contact finger is provided with a driving surface extending close to the inner wall of the isolation cover from top to bottom, the upper end of the static contact finger is provided with an abutting member, the outer wall of the abutting member is provided with an abutting surface extending close to the inner wall of the isolation cover from top to bottom, and the abutting surface abuts against the driving surface; the upper surface of the driving block is provided with a first magnetic member, the outer circumferential wall of the moving contact head is provided with a second magnetic member, the second magnetic member and the first magnetic member are magnetically opposite, when the moving contact head moves downward, the repulsive force generated by the second magnetic member can drive the first magnetic member to move downward, the first magnetic member drives the driving block to move downward, and the driving block can push the static contact finger to move close to the static contact head and abut against the outer circumferential wall of the moving contact head through the abutting member; when the moving contact head moves upward, the third elastic member can push the driving block to move upward and reset, and the second elastic member can push the static contact finger to move in the direction close to the inner wall of the isolation cover and reset.

[0015] According to some embodiments of the present application, the first magnetic assembly and the second magnetic assembly are arranged between the limiting plate and the bottom of the moving contact head; the first magnetic assembly includes first and second permanent magnets with the same magnetism, the first permanent magnet is arranged on the limiting plate, the second permanent magnet is arranged on the bottom of the moving contact head, and the repulsive force generated between the first and second permanent magnets can prevent the moving contact head from moving downward; the second magnetic assembly includes first and second electromagnetic structures, the first electromagnetic structure is arranged on the limiting plate and is electrically connected with the static contact seat, the second electromagnetic structure is arranged on the bottom of the moving contact head, when the moving contact head moves downward to be electrically connected with the static contact head and the static contact finger, the second electromagnetic structure can be electrified and generate an attractive force which is mutually attractive with the first magnetic structure, and the attractive force is greater than the repulsive force generated between the first and second permanent magnets.

[0016] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attendant drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The foregoing and / or additional aspects and advantages of the present application are achieved by providing a quick grounding switch device, which comprises a housing, a fixed contact, a movable contact assembly, a drive device and a sealing assembly.

[0018] Figure 1 A schematic view of a quick grounding switch device according to an embodiment of the present application;

[0019] Figure 2 Another schematic view of a quick grounding switch device according to an embodiment of the present application;

[0020] Figure 3 An internal schematic view of a quick grounding switch device according to an embodiment of the present application;

[0021] Figure 4 A sectional schematic view of a quick grounding switch device according to an embodiment of the present application;

[0022] Figure 5 An enlarged schematic view of A in FIG. 1; Figure 4

[0023] A schematic view of a sealing assembly according to an embodiment of the present application; Figure 6

[0024] A sectional schematic view of a quick grounding switch device according to an embodiment of the present application; Figure 7

[0025] Another sectional schematic view of a quick grounding switch device according to an embodiment of the present application; Figure 8

[0026] An enlarged schematic view of B in FIG. 1; Figure 9 Figure 8 A sectional schematic view of another embodiment of the present application.

[0027] Figure 10 REFERENCE SIGNS:

[0028] The housing 100, the mounting cavity 110;

[0029] The movable contact assembly 200, the movable contact seat 210, the seat body 211, the connecting seat 212, the movable contact 220, the plug-in hole 221, the second magnetic member 222;

[0030] The drive device 300, the rotating shaft 310, the transmission assembly 320, the crank arm 330, the swing arm 340, the eccentric wheel 350, the proximal end 351, the distal end 352, the sliding block 360, the rolling member 370;

[0031] The drive device 300, the rotating shaft 310, the transmission assembly 320, the crank arm 330, the swing arm 340, the eccentric wheel 350, the proximal end 351, the distal end 352, the sliding block 360, the rolling member 370; ​

[0032] The grounding assembly 400, the grounding copper bar 410, the grounding terminal 420, the insulating sleeve 430, the sealing part 431, the pressing block 440;

[0033] The dynamic sealing disc 500, the O-shaped sealing ring 510, the lip-shaped sealing ring 520, the body 521, the first annular groove 522, the second annular groove 523, the extension 524, the first lip 525, the second lip 526, the third lip 527, the first protruding part 528, the second protruding part 529, the skeleton 530, the gasket 540, the bearing 550, the shaft sleeve 560, the third protruding part 561, the third sealing ring 570, the third annular groove 571, the fourth annular groove 572, the fifth annular groove 573, the annular elastic ring 574;

[0034] The static contact assembly 600, the static contact seat 610, the static contact 620, the isolation cover 630, the accommodation hole 631, the limiting plate 640, the static contact finger 650, the abutting part 651, the abutting surface 652, the second elastic part 660, the driving block 670, the first magnetic part 671, the driving surface 672, the third elastic part 673, the supporting part 674, the first permanent magnet 680, the second permanent magnet 681, the first electromagnetic assembly 690, the second electromagnetic assembly 691. DETAILED DESCRIPTION

[0035] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0036] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0037] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0038] In the description of the present application, unless otherwise explicitly defined, the words such as arrangement, installation, connection and the like should be understood in a broad sense, and the skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0039] With reference to Figures 1 to 10 In an embodiment of the present application, a fast grounding switch device is provided, which comprises a shell 100, three sets of movable contact assembly 200, three sets of static contact assembly 600, a driving device 300 and a grounding assembly 400. The shell 100 has a mounting cavity 110; the three sets of movable contact assembly 200 are arranged side by side inside the shell 100, the movable contact assembly 200 comprises a movable contact seat 210 and a movable contact 220, the movable contact seat 210 is fixedly installed inside the shell 100 and is provided with a first mounting hole arranged in the up-down direction, and the movable contact 220 is movably installed in the first mounting hole and can move along the up-down direction; the three sets of static contact assembly 600 are correspondingly arranged below the three sets of movable contact assembly 200; the driving mechanism comprises the driving device 300, a rotating shaft 310 and a transmission assembly 320, the driving device 300 is arranged outside the shell 100, the rotating shaft 310 is in transmission connection with the driving device 300 and extends into the mounting cavity 110, the transmission assembly 320 is in transmission connection between the rotating shaft 310 and the three sets of movable contact 220, the driving device 300 can drive the rotating shaft 310 to rotate, and the movable contact 220 is driven by the transmission assembly 320 to move along the up-down direction to approach or move away from the corresponding static contact assembly 600; the grounding assembly 400 is arranged in the shell 100; wherein the movable contact seat 210 is a conductive structure and extends to be electrically connected with the grounding assembly 400, the movable contact 220 is in contact with the inner wall of the first mounting hole and is electrically connected with the grounding assembly 400 through the movable contact seat 210. In addition, a bearing 550 is further arranged between the rotating shaft 310 and the shell 100, an outer side of the bearing 550 is provided with a shaft sleeve 560, and a third sealing ring 570 abutting against the outer shell of the driving device 300 is arranged in the shaft sleeve 560; a third annular groove 571 is arranged on an inner side surface of the third sealing ring 570, a fourth annular groove 572 is arranged on an outer side surface of the third sealing ring 570, a fifth annular groove 573 is arranged around the outer periphery of the third annular groove 571 on an inner side peripheral wall of the fourth annular groove 572, and an annular elastic ring 574 is arranged in the fifth annular groove 573; a third protruding portion 561 is arranged on the outer surface of the shaft sleeve 560 along the circumferential direction of the sealing groove, the third protruding portion 561 is embedded in the third annular groove 571, and the annular elastic ring 574 is sleeved on the outer periphery of the third annular groove 571 and makes the third protruding portion 561 and the third annular groove 571 in interference fit.

[0040] In the quick grounding switch device, the movable contact seat 210 is directly arranged as a conductive structure, so that the movable contact seat 210 can be extended to be electrically connected with the grounding assembly 400, and the movable contact 220 passing through the first mounting hole of the movable contact seat 210 can be in contact with the inner wall of the first mounting hole, so that the movable contact 220 can be electrically connected with the grounding assembly 400 through the movable contact seat 210, and when the driving mechanism drives the movable contact 220 to move downward to be close to the corresponding static contact assembly 600 and be electrically connected with the corresponding static contact assembly 600, the grounding of the static contact assembly 600 can be realized. Compared with the structure in the prior art in which a star contact is arranged in the movable contact seat 210 and a conductive sheet is arranged between the star contact and the grounding terminal 420, the embodiment of the present application does not need to additionally arrange any conductive structure, the movable contact seat 210 can not only play a positioning and supporting role but also play a conductive role, and the movable contact 220 can directly realize effective electrical connection with the grounding assembly 400 through the movable contact seat 210, so that the structure is simpler and the installation is more convenient.

[0041] In addition, by arranging the bearing 550 between the rotating shaft 310 and the housing 100, stable rotation of the rotating shaft 310 can be ensured, and in turn, stable upward and downward movement of each movable contact 220 can be facilitated. By arranging the third sealing ring 570 between the shaft sleeve 560 and the driving device 300, the housing 100 and the driving device 300 can be sealingly connected, and the sealing property of the quick grounding switch device can be improved. Specifically, the third annular groove 571 is arranged on the inner side surface of the third sealing ring 570, the fourth annular groove 572 is arranged on the outer side surface of the third sealing ring 570, the fifth annular groove 573 is arranged on the inner side wall of the fourth annular groove 572 and surrounds the third annular groove 571, the third protruding portion 561 is arranged on the outer surface of the shaft sleeve 560 and arranged along the circumferential direction of the sealing groove, and the protruding portion on the shaft sleeve 560 can be directly embedded in the third annular groove 571 during installation, and the annular elastic ring 574 can be embedded in the fourth annular groove 572. After the annular elastic ring 574 is embedded in the fourth annular groove 572, the annular elastic ring 574 can be embedded in the fifth annular groove 573 on the inner side wall of the fourth annular groove 572 under the action of the elastic contraction force of the annular elastic ring 574. Since the fifth annular groove 573 surrounds the third annular groove 571, the annular elastic ring 574 in the fifth annular groove 573 is equivalent to being directly sleeved on the outer periphery of the third annular groove 571, so that the annular elastic ring 574 can press the inner side wall of the fifth annular groove 573 and the outer side wall of the third annular groove 571 under the action of the elastic contraction force of the annular elastic ring 574, and in turn, the third protruding portion 561 and the third annular groove 571 are in interference fit, so that the third sealing ring 570 can be stably installed on the shaft sleeve 560, and the phenomenon that the third sealing ring 570 falls off during rotation of the rotating shaft 310 can be avoided.

[0042] It can be understood that, with reference to Figure 1 The shell 100 specifically adopts a semi-cylindrical structure. Thus, the occupation area of the fast ground switch device can be reduced, and the fast ground switch device can be miniaturized. Of course, in addition thereto, the shell 100 can also adopt other shapes, and the present application does not make specific limitations thereto.

[0043] It can be understood that, in order to improve the conductivity of the movable contact seat 220, a watchband contact finger (not identified in the figure) can be installed on the inner wall of the first mounting hole. The watchband contact finger has the advantages of high bearing, low contact resistance and high stability, is beneficial to bearing high current of a high-voltage device, and can greatly improve the conductivity of the movable contact seat 220.

[0044] It can be understood that, with reference to Figures 1 to 10 The movable contact seat 210 includes a seat body 211 and a connecting seat 212. The seat body 211 is installed inside the shell 100, and the first mounting hole is formed in the seat body 211. The connecting seat 212 is connected to the seat body 211 and extends to be electrically connected with the grounding assembly 400. The seat body 211 and the connecting seat 212 can be provided as a detachable connection structure such as a bolt connection or a clamping connection, or the seat body 211 and the connecting seat 212 can be directly an integral molding structure, and the present application does not make specific limitations thereto.

[0045] With reference to Figures 1 to 10 In some embodiments, the grounding assembly 400 includes a grounding copper bar 410 and three grounding terminals 420 corresponding to the movable contact assembly 200 one by one. The side wall of the shell 100 is provided with a second mounting hole corresponding to the grounding terminal 420. The grounding terminal 420 is inserted into the corresponding second mounting hole. The inner end of the grounding terminal 420 is installed on the movable contact seat 210 and is electrically connected with the movable contact seat 210. The grounding copper bar 410 is located outside the shell 100 and is electrically connected with all the grounding terminals 420. An insulating sleeve 430 is clamped between each grounding terminal 420 and the inner circumferential wall of the second mounting hole. The insulating sleeve 430 is in interference fit with the grounding terminal 420. The shell 100 is further provided with a pressing block 440 sleeved on the outer periphery of the grounding terminal 420. The insulating sleeve 430 has a sealing portion 431 extending to the outer periphery of the second mounting hole. The sealing portion 431 is clamped between the pressing block 440 and the shell 100.

[0046] In the above structure, by opening the second mounting hole on the shell 100, the installation of the grounding terminal 420 can be facilitated to realize the electrical connection between the movable contact seat 210 inside the shell 100 and the grounding copper bar 410 outside the shell 100. Specifically, the movable contact seat 210 extends to the corresponding grounding terminal 420, the outer end of the grounding terminal 420 is electrically connected with the grounding copper bar 410, and the inner end of the grounding terminal 420 is installed on the movable contact seat 210 and is electrically connected with the movable contact seat 210. In this structure, the movable contact seat 210 not only can play a conductive role to realize the electrical connection between the grounding terminal 420 and the movable contact head 220, but also the installation of the movable contact seat 210 and the grounding terminal 420 together can improve the installation stability of the movable contact seat 210, so that the movable contact seat 210 can stably position and support the movable contact head 220. Specifically, the movable contact seat 210 and the grounding terminal 420 can be fixedly installed together by bolts. By setting the insulating sleeve 430 between the grounding terminal 420 and the inner circumferential wall of the second mounting hole, not only can the grounding terminal 420 and the shell 100 be isolated to prevent the current on the grounding terminal 420 from flowing to the shell 100, but also the interference fit between the insulating sleeve 430 and the grounding terminal 420 can improve the installation stability of the grounding terminal 420. In addition, by setting the sealing part 431 on the insulating sleeve 430 extending to the outer periphery of the second mounting hole, and extruding the sealing part 431 by the pressing block 440, the sealing part 431 is sealingly clamped between the pressing block 440 and the shell 100, thereby realizing the sealing of the second mounting hole, improving the sealing performance of the shell 100, and reducing the risk of leakage of high-pressure gas in the shell 100.

[0047] It can be understood that the shell 100 on one side is also provided with a pressing block 440 sleeved on the outer periphery of the grounding terminal 420, referring to Figures 1 to 10 , the pressing block 440 is specifically located on the outside of the shell 100, thereby facilitating the installation of the pressing block 440. Of course, in addition thereto, the pressing block 440 can also be arranged on the inside of the shell 100, which is not limited in the present application.

[0048] Referring to Figures 1 to 8 In some embodiments, the number of transmission assemblies 320 is three, and each transmission assembly 320 includes a crank arm 330 and a swing arm 340. One end of the crank arm 330 is installed on the rotating shaft 310, and the other end is rotationally connected with the swing arm 340. One end of the swing arm 340 away from the crank arm 330 is rotationally installed on the movable contact head 220. The rotating shaft 310 can drive the crank arm 330 to rotate and drive the movable contact head 220 to move in the up-down direction through the swing arm 340.

[0049] In the above structure, the three transmission assemblies 320 are all mounted on the same rotating shaft 310, that is, the three transmission assemblies 320 are simultaneously driven to move by the same rotating shaft 310, which helps to ensure the synchronous movement of the moving contacts 220 in the three moving contact assemblies 200. By configuring the transmission assembly 320 as a structure in which the crank arm 330 and the swing arm 340 are rotatably connected, during use, the driving device 300 can drive the rotating shaft 310 to rotate, and the rotating shaft 310 drives the crank arm 330 to rotate and can drive the crank arm 330 to move synchronously. Since the moving contact 220 is rotatably connected to the crank arm 330 and is movably mounted in the first mounting hole arranged in the vertical direction, when the crank arm 330 rotates, it can drive the moving contact 220 to move up and down along the first mounting hole via the swing arm 340, thereby achieving connection or separation between the moving contact 220 and the static contact assembly 600. The above structure abandons the traditional transmission method of gear rack and screw nut, and directly converts the rotational motion of the rotating shaft 310 into linear motion of the moving contact 220 in the up and down directions through the rotating connected crank arm 330 and the swing arm 340. The structure is simple and is conducive to the miniaturization of the rapid grounding switch device.

[0050] It is understandable that, referring to Figure 7 and Figure 8 In order to ensure that the driving device 300 can drive the crank arm 330 to rotate synchronously when the rotating shaft 310 is driven by the driving device 300, the rotating shaft 310 can be configured as a non-cylindrical shaft, that is, the cross section of the rotating shaft 310 is configured to be non-circular, and a hole that matches the cross-sectional shape of the rotating shaft 310 is opened in the crank arm 330. This prevents the crank arm 330 from rotating relative to the rotating shaft 310 after being installed on the rotating shaft 310, thereby ensuring that the driving device 300 can drive the crank arm 330 to rotate synchronously when the rotating shaft 310 is driven by the driving device 300. The cross section of the rotating shaft 310 can be configured as a hexagon, a pentagon, or other polygon. In addition, it can also be configured as an ellipse or other shapes, which are not specifically limited by the present invention. Of course, in order to achieve synchronous rotation between the crank arm 330 and the rotating shaft 310, in addition to setting the cross section of the rotating shaft 310 to be non-circular, the rotating shaft 310 and the crank arm 330 can also be directly interference fit to improve the connection stability between the two, or a pin structure can be installed between the rotating shaft 310 and the crank arm 330 to fix and limit the two. The present invention does not make specific limitations on this.

[0051] Reference Figure 10In some embodiments, the transmission assembly 320 comprises an eccentric wheel 350 and a sliding block 360, the eccentric wheel 350 is installed on the rotating shaft 310 and above the movable contact assembly 200, the sliding block 360 is installed between the eccentric wheel 350 and the movable contact assembly 200, the upper end of the sliding block 360 abuts against the eccentric wheel 350, and the lower end of the sliding block 360 abuts against all the movable contacts 220, and a first elastic member is installed between each movable contact 220 and the shell 100 or the movable contact seat 210; when the distal end 352 of the eccentric wheel 350 rotates downward, the eccentric wheel 350 can push all the movable contacts 220 to move downward to electrically connect with the stationary contact assembly 600 through the sliding block 360; when the distal end 352 of the eccentric wheel 350 moves upward, the first elastic member can push the corresponding movable contact 220 to move upward to separate from the stationary contact assembly 600.

[0052] In the above structure, by setting the transmission assembly 320 as the structure of the eccentric wheel 350 and the sliding block 360, when the driving device 300 drives the rotating shaft 310 to rotate, the rotating shaft 310 can drive the eccentric wheel 350 to rotate, the eccentric wheel 350 has a proximal end 351 and a distal end 352, the distance between the proximal end 351 and the rotating shaft 310 is smaller than the distance between the distal end 352 and the rotating shaft 310, therefore, by setting the sliding block 360 between the eccentric wheel 350 and the movable contact 220, the upper end of the sliding block 360 abuts against the eccentric wheel 350, and the lower end of the sliding block 360 abuts against all the movable contacts 220, when the rotating shaft 310 drives the eccentric wheel 350 to rotate and makes the distal end 352 rotate downward, the eccentric wheel 350 can push the sliding block 360 to move downward, and in turn can push each movable contact 220 to move downward and make the first elastic member compressively deform downward, in this process, each movable contact 220 can move downward to approach the stationary contact assembly 600 and electrically connect with the stationary contact assembly 600; when the rotating shaft 310 drives the eccentric wheel 350 to rotate and makes the distal end 352 rotate upward, that is, the proximal end 351 of the eccentric wheel 350 rotates downward, at this time, the first elastic member can reset upward under the action of the elastic restoring force of itself, and push the sliding block 360 and the corresponding movable contact 220 to move upward to reset, so that the movable contact 220 separates from the corresponding stationary contact assembly 600.

[0053] Referring to Figure 10 In some embodiments, a rolling member 370 is installed between the sliding block 360 and the eccentric wheel 350, the upper surface of the sliding block 360 is provided with a mounting groove matched with the rolling member 370, the rolling member 370 is movably installed in the mounting groove and protrudes from the upper surface of the sliding block 360, and the outer peripheral wall of the eccentric wheel 350 abuts against the rolling member 370 and can drive the rolling member 370 to roll in the mounting groove.

[0054] In the above structure, the rolling member 370 is movably mounted on the upper surface of the sliding block 360, and the outer peripheral wall of the eccentric wheel 350 abuts against the rolling member 370, so that when the rotating shaft 310 drives the eccentric wheel 350 to rotate, the eccentric wheel 350 can drive the rolling member 370 to roll while pushing the sliding block 360 to move downward or making the sliding block 360 move upward under the action of the first elastic member. This structure can avoid the outer peripheral wall of the eccentric wheel 350 directly contacting the upper surface of the sliding block 360, thereby avoiding the sliding friction generated during the relative rotation of the two affecting the rotation stability of the eccentric wheel 350 and the movement stability of the sliding block 360. By arranging the rolling member 370, the sliding friction between the eccentric wheel 350 and the sliding block 360 can be converted into rolling friction between the eccentric wheel 350 and the rolling member 370, thereby making the operation of the eccentric wheel 350 and the sliding block 360 more stable and smooth.

[0055] It can be understood that the rolling member 370 can be a spherical ball or a cylindrical rolling body, and the present application does not make specific limitation thereon.

[0056] It can be understood that the upper end of the sliding block 360 abuts against the eccentric wheel 350, and the lower end of the sliding block 360 abuts against all the moving contacts 220. Specifically, the sliding block 360 can be a one-piece structure and abut against three moving contacts 220 at the same time, thereby improving the synchronization of the movement of the three moving contacts 220. Alternatively, the sliding block 360 can include a split structure corresponding to the three moving contacts 220 one by one. At this time, the number of eccentric wheels 350 can also be correspondingly set to three, and each eccentric wheel 350 can push the corresponding split structure to move downward and push the corresponding moving contact 220 to move downward to electrically connect with the stationary contact assembly 600.

[0057] Referring to Figures 1 to 6 In some embodiments, the housing 100 is provided with a third mounting hole, and a dynamic sealing disc 500 is mounted in the third mounting hole. The dynamic sealing disc 500 is provided with a sealing hole in communication with the mounting cavity 110, and the rotating shaft 310 penetrates through the sealing hole and extends to the outside of the housing 100. The bearing 550 is mounted between the rotating shaft 310 and the inner wall of the sealing groove; wherein the first sealing ring and at least two second sealing rings are further mounted between the rotating shaft 310 and the peripheral wall of the sealing hole and located inside the bearing 550. The first sealing ring is an O-shaped sealing ring 510, and the second sealing ring is a lip-shaped sealing ring 520. All the lip-shaped sealing rings 520 are located outside the O-shaped sealing ring and are arranged in the axial direction of the sealing hole at intervals. One gasket 540 is clamped between each two adjacent lip-shaped sealing rings 520.

[0058] In the above structure, by disposing an O-ring 510 and a lip seal 520 between the rotating shaft 310 and the peripheral wall of the sealing hole, a good dynamic seal structure can be formed on the outer periphery of the rotating shaft 310. The sealing between the rotating shaft 310 and the peripheral wall of the sealing hole is beneficial to improving the sealing performance of the housing 100 and preventing leakage of high-pressure gas within the housing 100. At the same time, it can also ensure the normal rotation of the rotating shaft 310, form a relatively stable power output to the transmission assembly 320, and thus enable each moving contact 220 to move up and down stably. In addition, by sandwiching a gasket 540 between each two adjacent lip seals 520, the stability of the dynamic seal structure can be improved. At the same time, the two adjacent lip seals 520 are arranged at a distance, reducing the obstruction caused by the lips of the lip seals 520 to the rotation of the rotating shaft 310, thereby facilitating the normal rotation of the rotating shaft 310.

[0059] Reference Figures 1 to 6 In some embodiments, the lip seal ring 520 includes a body 521 and a skeleton 530. The body 521 is provided with a fourth mounting hole for the rotation shaft 310 to pass through. A first annular groove 522 is provided on one side surface of the body 521 around the outer circumference of the fourth mounting hole. A second annular groove 523 is provided on one side wall of the first annular groove 522 along the circumference of the first annular groove 522. The skeleton 530 is installed in the first annular groove 522 and embedded in the second annular groove 523. The body 521 has an extension portion 524 extending outward along the axial direction of the body 521 from the outer peripheral edge of the first annular groove 522. The inner peripheral wall of the fourth mounting hole is protrudingly provided with a first lip portion 525 and a second lip portion 526. 526 and the third lip 527, the first lip 525 and the second lip 526 are both located on the side of the third lip 527 close to the extension portion 524, and the radial length of the first lip 525 and the second lip 526 is greater than the radial length of the third lip 527, the surfaces of the first lip 525 and the second lip 526 are provided with a plurality of annular first protrusions 528 arranged along the radial direction of the fourth mounting hole, and the outer peripheral wall of the main body 521 is provided with a second protrusion 529 arranged along the circumference of the main body 521; wherein, the first lip 525, the second lip 526 and the third lip 527 are all interference fit with the rotating shaft 310, and the second protrusion 529 is interference fit with the inner peripheral wall of the sealing groove.

[0060] In the above structure, the skeleton 530 is installed in the first annular groove 522 and embedded in the second annular groove 523, thereby the body 521 can be stably supported by the skeleton 530, and the structural stability of the lip-shaped sealing ring 520 is improved. By arranging the first lip 525, the second lip 526 and the third lip 527, i.e. arranging three lips, the dynamic sealing effect of the lip-shaped sealing ring 520 can be effectively improved. In addition, the first protruding part 528 is arranged on the surface of the first lip 525 and the second lip 526, and the first protruding part 528 can be in close contact with the outer circumferential wall of the rotating shaft 310. The second protruding part 529 is arranged on the outer circumferential wall of the body 521 along the circumferential direction of the body 521, thereby the body 521 can be conveniently installed between the rotating shaft 310 and the sealing groove, and the second protruding part 529 can be in close contact with the inner circumferential wall of the sealing groove. The arrangement of the first protruding part 528 and the second protruding part 529 can further improve the dynamic sealing effect of the lip-shaped sealing ring 520.

[0061] It can be understood that, with reference to Figure 6 , the second annular groove 523 can be arranged at the bottom of the first annular groove 522, so that the cross sections of the first annular groove 522 and the second annular groove 523 can be combined to form an L shape, and the cross section of the skeleton 530 is also correspondingly arranged in an L shape, thereby the body 521 can be stably supported by the skeleton 530, and the structural stability of the lip-shaped sealing ring 520 is improved. It can be understood that, in addition to the above structure, the second annular groove 523 can also be arranged at the middle of the first annular groove 522, so that the cross sections of the first annular groove 522 and the second annular groove 523 can be combined to form a T shape, and the cross section of the skeleton 530 is also correspondingly arranged in a T shape, which is not limited in the present application.

[0062] With reference to Figure 9In some embodiments, the static contact assembly 600 comprises a static contact seat 610, a static contact 620, petal-shaped contact fingers, and an isolation cover 630, the static contact 620 is mounted on the static contact seat 610, the petal-shaped contact fingers are mounted on the static contact seat 610 and arranged around the outer periphery of the static contact 620, the isolation cover 630 covers the outer periphery of the static contact 620 and the petal-shaped contact fingers, and the top wall of the isolation cover 630 is provided with a gap hole 631 for the dynamic contact 220 to pass through; the lower end of the dynamic contact 220 is provided with a plug-in hole 221 for plugging with the static contact 620, and the lower periphery of the plug-in hole 221 is provided with a guide surface extending outward from top to bottom, the dynamic contact 220 can be moved downward to be clamped between the static contact 620 and the petal-shaped contact fingers, the inner peripheral wall of the plug-in hole 221 is in contact with and electrically connected to the static contact 620, and the outer peripheral wall of the dynamic contact 220 is in contact with and electrically connected to the petal-shaped contact fingers.

[0063] By adopting the above structure, when the dynamic contact 220 moves downward to approach the static contact assembly 600, the guide surface of the lower end of the dynamic contact 220 can guide the static contact 620 to be accurately plugged into the plug-in hole 221 and make the dynamic contact 220 located between the static contact 620 and the petal-shaped contact fingers, at this time, the inner peripheral wall of the plug-in hole 221 is in contact with and electrically connected to the static contact 620, and the outer peripheral wall of the dynamic contact 220 is in contact with and electrically connected to the petal-shaped contact fingers, thereby realizing the electrical connection between the dynamic contact 220 and the static contact assembly 600, and further enabling the electrical structure connected to the static contact assembly 600 to be grounded. The static contact seat 610 is mounted on the electrical structure to be grounded and can support and fix the static contact 620 and the petal-shaped contact fingers, and the isolation cover 630 can suppress the arc generated when the dynamic contact 220 contacts the static contact 620 and the petal-shaped contact fingers in the cover without affecting the normal conduction work, and the isolation cover 630 can be made of copper-tungsten alloy.

[0064] It can be understood that, with reference to Figure 9 The lower end of the dynamic contact 220 is provided with a plug-in hole 221 for plugging with the static contact 620, specifically, the dynamic contact 220 can be designed as a hollow copper pipe, the bottom of the pipe is made of copper-tungsten alloy with good arc burning resistance and anti-welding performance, and the pipe wall is plated with silver to increase the electrical conductivity and corrosion resistance.

[0065] With reference to Figure 9In some embodiments, the upper surface of the static contact seat 610 is mounted with a limiting plate 640 extending to the outside of the static contact seat 610, the static contact head 620 is arranged through the limiting plate 640 and is mounted on the static contact seat 610, the petal-shaped contact fingers include a plurality of static contact fingers 650 arranged along the circumference of the static contact head 620 in sequence, each static contact finger 650 is movably arranged in the limiting plate 640 and can move radially along the limiting plate 640 to move close to or away from the static contact head 620, and a second elastic member 660 is arranged between the static contact finger 650 and the limiting plate 640; the inner wall of the isolation cover 630 is movably mounted with a driving block 670 corresponding to each static contact finger 650, the driving block 670 can move relative to the isolation cover 630 in the up-down direction, the inner wall of the isolation cover 630 is protrusively provided with a supporting block below the driving block 670, and a third elastic member 673 is arranged between the driving block 670 and the supporting block; the side of the driving block 670 close to the static contact finger 650 is provided with a driving surface 672 extending from top to bottom along the inner wall of the isolation cover 630, the upper end of the static contact finger 650 is provided with an abutting member 651, the outer wall of the abutting member 651 is provided with an abutting surface 652 extending from top to bottom along the inner wall of the isolation cover 630, and the abutting surface 652 abuts against the driving surface 672; the upper surface of the driving block 670 is provided with a first magnetic member 671, the outer circumferential wall of the moving contact head 220 is provided with a second magnetic member 222, the second magnetic member 222 and the first magnetic member 671 are magnetically opposite, when the moving contact head 220 moves downward, the repulsive force generated by the second magnetic member 222 can drive the first magnetic member 671 to move downward, the first magnetic member 671 drives the driving block 670 to move downward, and the driving block 670 can push the static contact finger 650 to move close to the static contact head 620 and abut against the outer circumferential wall of the moving contact head 220 through the abutting member 651; when the moving contact head 220 moves upward, the third elastic member 673 can push the driving block 670 to move upward and reset, and the second elastic member 660 can push the static contact finger 650 to move in the direction close to the inner wall of the isolation cover 630 and reset.

[0066] By adopting the above structure, the petal-shaped contact fingers include a plurality of movable static contact fingers 650 inserted in the limiting plate 640, the static contact fingers 650 can move radially along the limiting plate 640 to approach or move away from the static contact head 620, and a second elastic member 660 is arranged between the static contact fingers 650 and the limiting plate 640. The distance between the static contact fingers 650 and the static contact head 620 is greater than the thickness of the moving contact head 220. In the process of moving the moving contact head 220 downward to be inserted in the outer periphery of the static contact head 620, the second magnetic member 222 on the outer wall of the moving contact head 220 gradually approaches the first magnetic member 671 on the driving block 670 downward. Since the first magnetic member 671 and the second magnetic member 222 are magnetically the same, the repulsive force generated between them can drive the first magnetic member 671 to move downward, and the first magnetic member 671 drives the driving block 670 to move downward. At this time, the third elastic member 673 is contracted. Since the driving block 670 has a driving surface 672 extending along the inner wall of the isolation cover 630 from top to bottom, the abutting member 651 on the upper end of the static contact finger 650 is provided with an abutting surface 652 fitted with the driving surface 672. Therefore, when the driving block 670 moves downward, it will push the abutting member 651 and the static contact finger 650 to move in the direction of approaching the static contact head 620. At this time, the second elastic member 660 is contracted, and the static contact finger 650 abuts against the outer peripheral wall of the moving contact head 220 to realize the electrical connection between them. When the moving contact head 220 moves upward, the third elastic member 673 can push the driving block 670 to move upward and reset, and the second elastic member 660 can push the static contact finger 650 to move in the direction of approaching the inner wall of the isolation cover 630 and reset. In the above structure, when the moving contact head 220 is not inserted into the static contact head assembly 600, the distance between the static contact finger 650 and the static contact head 620 is greater than the thickness of the moving contact head 220. When the moving contact head 220 moves downward, it will not directly impact the static contact finger 650 downward, but will drive the static contact finger 650 to abut against the outer peripheral wall of the moving contact head 220 along the radial direction of the isolation cover 630 to realize the contact between them. Therefore, it can reduce the risk of friction or impact on the static contact finger 650 when the moving contact head 220 moves downward at too high a speed and is inserted between the static contact head 620 and the static contact finger. In turn, it can reduce the damage between the moving contact head 220 and the static contact finger 650 caused by friction or rigid impact.

[0067] It can be understood that the petal-shaped contact fingers include a plurality of static contact fingers 650 arranged in sequence along the circumference of the static contact head 620, i.e., the petal-shaped contact fingers are annular and divided. It can not only ensure that other static contact fingers 650 can still ensure the conduction of current in the case of slight wear or poor contact of part of the static contact fingers 650.

[0068] It can be understood that in some embodiments, a limiting spring (not shown in the figure) can be sleeved on the outer periphery of the petal-shaped contact finger, that is, the outer wall of each static contact finger 650 abuts against the limiting spring, thereby limiting each static contact finger 650 from deviating or mispositioning, thereby ensuring the stability of the petal-shaped contact finger structure and enabling the petal-shaped contact finger to stably contact or separate from the moving contact 220.

[0069] Referring to the drawings, in some embodiments, a first magnetic component and a second magnetic component are arranged between the limiting plate 640 and the bottom of the moving contact 220; the first magnetic component includes first and second permanent magnets 680 and 681 that are magnetically identical, the first permanent magnet 680 is arranged on the limiting plate 640, and the second permanent magnet 681 is arranged on the bottom of the moving contact 220, and the repulsion force generated between the first and second permanent magnets 680 and 681 can prevent the moving contact 220 from moving downward; the second magnetic component includes first and second electromagnetic structures, wherein the first electromagnetic structure is arranged on the limiting plate 640 and is electrically connected with the static contact seat 610, and the second electromagnetic structure is arranged on the bottom of the moving contact 220, and when the moving contact 220 moves downward to be electrically connected with the static contact 620 and the static contact finger 650, the second electromagnetic structure can be energized to generate an attractive force that attracts the first magnetic structure, and the attractive force is greater than the repulsion force generated between the first and second permanent magnets 680 and 681.

[0070] By adopting the above structure, during the downward movement of the moving contact 220, the repulsion force generated between the first and second permanent magnets 680 and 681 can prevent the moving contact 220 from moving downward, thereby further reducing the moving speed of the moving contact 220, and thereby reducing the risk of impact damage between the moving contact 220 and the static contact 620 and the static contact finger 650 due to the excessive downward movement speed of the moving contact 220. When the moving contact 220 continues to move downward to be electrically connected with the static contact 620 and the static contact finger 650, the second electromagnetic structure on the moving contact 220 can be energized, and the energized second electromagnetic structure can generate an attractive force that attracts the first magnetic structure, and the attractive force is greater than the repulsion force generated between the first and second permanent magnets 680 and 681, thereby providing a downward pulling force to the moving contact 220, so that the moving contact 220 is stably inserted between the static contact 620 and the static contact finger 650.

[0071] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A fast ground switch device, characterized by, The utility model relates to a three -dimensional contactor, including: The shell (100) has the installation cavity (110); Three groups of dynamic contact components (200) are arranged side by side in the shell (100), and the dynamic contact component (200) includes dynamic contact seat (210) and dynamic contact (220), the dynamic contact seat (210) is fixedly installed in the shell (100) and is opened with the first installation hole along the up-down direction, and the dynamic contact (220) is movably installed in the first installation hole and can move along the up-down direction; Three groups of static contact components (600) are correspondingly arranged below the three groups of dynamic contact components (200); The driving mechanism includes driving device (300), rotating shaft (310) and transmission assembly (320), the driving device (300) is arranged outside the shell (100), the rotating shaft (310) is in transmission connection with the driving device (300) and extends into the installation cavity (110), the transmission assembly (320) is in transmission connection between the rotating shaft (310) and three dynamic contacts (220), and the driving device (300) can drive the rotating shaft (310) to rotate, and the dynamic contact (220) is driven to move along the up-down direction by the transmission assembly (320) and approaches or moves away from the corresponding static contact component (600); The grounding assembly (400) is arranged in the shell (100); Wherein, the dynamic contact seat (210) is electrically conductive structure and extends to electrically connected with the grounding assembly (400), the dynamic contact (220) is in contact with the inner wall of the first installation hole and is electrically connected with the grounding assembly (400) through the dynamic contact seat (210); The bearing (550) is installed between the rotating shaft (310) and the shell (100), the shaft sleeve (560) is installed on the outer side of the bearing (550), the third sealing ring (570) is arranged in the shaft sleeve (560) and is in abutment with the shell of the driving device (300);The inner side surface of the third sealing ring (570) is provided with the third annular groove (571), the outer side surface of the third sealing ring (570) is provided with the fourth annular groove (572), the inner side wall of the fourth annular groove (572) is provided with the fifth annular groove (573) around the third annular groove (571), and the annular elastic ring (574) is installed in the fifth annular groove (573); The outer surface of the shaft sleeve (560) is provided with the third protruding portion (561) along the circumferential direction of the sealing groove, the third protruding portion (561) is embedded in the third annular groove (571), and the annular elastic ring (574) is sleeved on the outer periphery of the third annular groove (571) and makes the third protruding portion (561) and the third annular groove (571) interference fit.

2. The fast ground switch apparatus of claim 1, wherein, The grounding assembly (400) comprises a grounding copper bar (410) and three grounding terminals (420) corresponding to the movable contact assembly (200) one by one, the shell (100) side wall is provided with a second mounting hole corresponding to the grounding terminal (420), the grounding terminal (420) is arranged in the corresponding second mounting hole, the inner end of the grounding terminal (420) is arranged on the movable contact seat (210) and is electrically connected with the movable contact seat (210), and the grounding copper bar (410) is arranged on the outer side of the shell (100) and is electrically connected with all the grounding terminals (420); Each of the grounding terminals (420) is clamped between the inner circumferential wall of the second mounting hole, the insulating sleeve (430) is in interference fit with the grounding terminal (420), and the shell (100) is further provided with a pressing block (440) sleeved on the outer periphery of the grounding terminal (420). The insulating sleeve (430) has a sealing portion (431) extending to the outer periphery of the second mounting hole, and the sealing portion (431) is clamped between the pressing block (440) and the shell (100).

3. The fast ground switch apparatus of claim 1, wherein, The number of the transmission assembly (320) is three, each of the transmission assembly (320) comprises a crank arm (330) and a swing arm (340), one end of the crank arm (330) is arranged on the rotating shaft (310), the other end is rotatably connected with the swing arm (340), and one end of the swing arm (340) away from the crank arm (330) is rotatably arranged on the movable contact (220). The rotating shaft (310) can drive the crank arm (330) to rotate and drive the movable contact (220) to move in the up-down direction through the swing arm (340).

4. The fast ground switch apparatus of claim 1, wherein, The transmission assembly (320) comprises an eccentric wheel (350) and a sliding block (360), the eccentric wheel (350) is arranged on the rotating shaft (310) and located above the movable contact assembly (200), the sliding block (360) is arranged between the eccentric wheel (350) and the movable contact assembly (200), the upper end of the sliding block (360) abuts against the eccentric wheel (350), and the lower end of the sliding block (360) abuts against all the movable contacts (220). Each of the movable contacts (220) is provided with a first elastic member between the shell (100) or the movable contact seat (210); When the distal end (352) of the eccentric wheel (350) rotates downward, the eccentric wheel (350) can push all the movable contacts (220) downward through the sliding block (360) to be electrically connected with the static contact assembly (600); When the distal end (352) of the eccentric wheel (350) moves upward, the first elastic member can push the corresponding movable contact (220) to move upward to be separated from the static contact assembly (600).

5. The fast ground switch apparatus of claim 4, wherein, A rolling element (370) is mounted between the sliding block (360) and the eccentric wheel (350), an upper surface of the sliding block (360) is provided with a mounting groove matched with the rolling element (370), the rolling element (370) is movably mounted in the mounting groove and protrudes from the upper surface of the sliding block (360), and an outer peripheral wall of the eccentric wheel (350) abuts against the rolling element (370) and can drive the rolling element (370) to roll in the mounting groove.

6. The fast ground switch apparatus of claim 1, wherein, The shell (100) is provided with a third mounting hole, a dynamic sealing disc (500) is mounted in the third mounting hole, the dynamic sealing disc (500) is provided with a sealing hole communicated with the mounting cavity (110), the rotating shaft (310) penetrates through the sealing hole and extends to the outside of the shell (100), and the bearing (550) is mounted between the rotating shaft (310) and the inner wall of the sealing groove; The first sealing ring is an O-shaped sealing ring (510), the second sealing ring is a lip-shaped sealing ring (520), all the lip-shaped sealing rings (520) are located outside the O-shaped sealing ring and are arranged at intervals along the axial direction of the sealing hole, and a gasket (540) is clamped between every two adjacent lip-shaped sealing rings (520).

7. The fast ground switch apparatus of claim 6, wherein, The lip-shaped sealing ring (520) comprises a body (521) and a framework (530), the body (521) is provided with a fourth mounting hole through which the rotating shaft (310) penetrates, one side surface of the body (521) is provided with a first annular groove (522) arranged around the outer periphery of the fourth mounting hole, one side wall of the first annular groove (522) is provided with a second annular groove (523) arranged along the circumferential direction of the first annular groove (522), the framework (530) is mounted in the first annular groove (522) and embedded in the second annular groove (523), and the body (521) has an extension (524) extending outward along the axial direction of the body (521) at the outer periphery of the first annular groove (522). The inner peripheral wall of the fourth mounting hole is protrudingly provided with a first lip portion (525), a second lip portion (526) and a third lip portion (527), the first lip portion (525) and the second lip portion (526) are located on one side of the third lip portion (527) close to the extension (524), the radial length of the first lip portion (525) and the second lip portion (526) is greater than the radial length of the third lip portion (527), the surface of the first lip portion (525) and the second lip portion (526) is provided with a plurality of annular first protrusions (528) arranged along the radial direction of the fourth mounting hole, and the outer peripheral wall of the body (521) is provided with a second protrusion (529) arranged along the circumferential direction of the body (521). The first lip (525), the second lip (526) and the third lip (527) are in interference fit with the rotating shaft (310), and the second protruding part (529) is in interference fit with the inner circumferential wall of the sealing groove.

8. The fast ground fault interrupter device of claim 1, wherein, The static contact assembly (600) comprises a static contact seat (610), a static contact (620), petal-shaped contact fingers and an isolation cover (630), the static contact (620) is installed on the static contact seat (610), the petal-shaped contact fingers are installed on the static contact seat (610) and are arranged around the outer periphery of the static contact (620), and the isolation cover (630) covers the outer periphery of the static contact (620) and the petal-shaped contact fingers, and a gap (631) is formed in the top wall of the isolation cover (630) for the movable contact (220) to pass through. The lower end of the movable contact (220) is provided with a plug-in hole (221) for plugging into the static contact (620), the lower periphery of the plug-in hole (221) is provided with a guide surface extending outward from top to bottom, the movable contact (220) can be moved downward to be clamped between the static contact (620) and the petal-shaped contact fingers, the inner circumferential wall of the plug-in hole (221) is in contact with the static contact (620) and is electrically connected to the static contact (620), and the outer circumferential wall of the movable contact (220) is in contact with the petal-shaped contact fingers and is electrically connected to the petal-shaped contact fingers.

9. The fast ground switch apparatus of claim 8, wherein, The upper surface of the static contact seat (610) is provided with a limiting plate (640) extending to the outside of the static contact seat (610), the static contact (620) passes through the limiting plate (640) and is installed on the static contact seat (610), and the petal-shaped contact fingers comprise a plurality of static contact fingers (650) arranged in sequence along the circumference of the static contact (620), each static contact finger (650) is movably inserted into the limiting plate (640) and can move radially along the limiting plate (640) to move close to or away from the static contact (620), and a second elastic member (660) is arranged between the static contact finger (650) and the limiting plate (640). A driving block (670) corresponding to each static contact finger (650) is movably installed on the inner wall of the isolation cover (630), and the driving block (670) can move up and down relative to the isolation cover (630), and a supporting block located below the driving block (670) is protrudingly arranged on the inner wall of the isolation cover (630), and a third elastic member (673) is arranged between the driving block (670) and the supporting block. The side of the driving block (670) close to the static contact finger (650) is provided with a driving surface (672) extending from top to bottom along the inner wall of the isolation cover (630), the upper end of the static contact finger (650) is provided with an abutting member (651), the outer wall of the abutting member (651) is provided with an abutting surface (652) extending from top to bottom along the inner wall of the isolation cover (630), and the abutting surface (652) abuts against the driving surface (672). The upper surface of the driving block (670) is provided with a first magnetic member (671), the outer peripheral wall of the movable contact (220) is provided with a second magnetic member (222), the second magnetic member (222) and the first magnetic member (671) are magnetically opposite, when the movable contact (220) moves downward, the repulsive force generated by the second magnetic member (222) can drive the first magnetic member (671) to move downward, the first magnetic member (671) drives the driving block (670) to move downward, the driving block (670) can push the static contact finger (650) to move close to the static contact (620) and abut against the outer peripheral wall of the movable contact (220) through the abutting member (651); when the movable contact (220) moves upward, the third elastic member (673) can push the driving block (670) to move upward and reset, and the second elastic member (660) can push the static contact finger (650) to move in the direction close to the inner wall of the isolation cover (630) and reset.

10. The fast ground switch apparatus of claim 9, wherein, The first magnetic assembly and the second magnetic assembly are arranged between the limiting plate (640) and the bottom of the movable contact (220); The first magnetic assembly comprises first and second permanent magnets (680, 681) with the same magnetism, the first permanent magnet (680) is arranged on the limiting plate (640), and the second permanent magnet (681) is arranged at the bottom of the movable contact (220); the repulsive force generated between the first permanent magnet (680) and the second permanent magnet (681) can prevent the movable contact (220) from moving downward; The second magnetic assembly comprises first and second electromagnetic structures, the first electromagnetic structure is arranged on the limiting plate (640) and electrically connected with the static contact seat (610), and the second electromagnetic structure is arranged at the bottom of the movable contact (220); when the movable contact (220) moves downward to be electrically connected with the static contact (620) and the static contact finger (650), the second electromagnetic structure can be electrified to generate an attractive force which is mutually attractive with the first magnetic structure, and the attractive force is greater than the repulsive force generated between the first permanent magnet (680) and the second permanent magnet (681).

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