Solid-sealed polar pole and switch equipment

Abstract

The invention belongs to the technical field of power equipment, and discloses a solid-sealed polar pole and switch equipment. The solid-sealed polar pole comprises a driving piece, a body, an isolating switch and a vacuum arc-extinguishing chamber. The body is provided with a mounting cavity; the isolating switch is arranged in the mounting cavity and comprises a first static contact and a first moving contact, and the driving piece is in transmission connection with the first moving contact; the vacuum arc-extinguishing chamber is arranged in the mounting cavity and comprises a guide rod, a second moving contact and a second static contact; the second moving contact is arranged at one end of the guide rod away from the isolating switch; the driving piece can push the first moving contact to enable the disconnecting switch to be switched to a closed state, the driving piece can continuously push the guide rod to enable the vacuum arc-extinguishing chamber to be switched to a closed state, and in the closed state, the first moving contact is electrically connected with the guide rod; and when the thrust of the driving piece to the first moving contact and the second moving contact is released, the vacuum arc-extinguishing chamber and the isolating switch can be reset to an opening state. Therefore, the insulation performance can be improved, the overall structure tends to be compact, and the miniaturization design requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a sealed pole and a switch device. Background Art

[0002] In the power system, high-voltage switchgear, as a control and protection device, is a very important device in the transmission and distribution lines. Miniaturized switchgear significantly reduces the space occupied by the equipment by optimizing the internal structure and using high-density components. It is suitable for scenarios with limited space, especially in compact environments such as urban building power distribution, industrial fields, and ships. At the same time, miniaturized switchgear uses less materials, and the use of materials such as steel plates and copper bars will be significantly reduced, which meets the environmental requirements of carbon peak and carbon emission reduction.

[0003] Mastering the key technologies of insulation, temperature rise control and creepage of miniaturized switchgear is the key to improving the performance, reliability and safety of switchgear. Among them, the sealed pole is the core component of the switchgear, and its structural characteristics can determine the characteristics of the entire switchgear.

[0004] The current sealed pole has limited improvement in fracture insulation capacity. At the same time, the sealed pole occupies a large space and has poor compactness, which is not conducive to the miniaturization design of switchgear. Summary of the invention

[0005] The object of the present invention is to provide a sealed pole and switchgear, which can realize double-break insulation of vacuum and isolation by integrating the isolating switch, thereby improving the insulation performance; at the same time, it can also make the overall structure compact, meeting the design requirements of miniaturization of the switchgear.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A sealed pole, comprising:

[0008] Driving parts;

[0009] A body, wherein the body is provided with an installation cavity along a first direction;

[0010] An isolating switch is placed in the installation cavity, the isolating switch comprises a first static contact and a first moving contact movable along the first direction, the driving member is in transmission connection with the first moving contact;

[0011] A vacuum interrupter is placed in the installation cavity, and the vacuum interrupter comprises a guide rod, a second moving contact and a second static contact; the second moving contact is arranged at an end of the guide rod away from the disconnector, and the second static contact is fixed in the installation cavity;

[0012] The driving member can push the first moving contact to switch the disconnector to the closed state, and the driving member can continue to push the guide rod to switch the vacuum interrupter to the closed state. When the disconnector and the vacuum interrupter remain in the closed state, the first moving contact is electrically connected to the guide rod; when the driving member releases the thrust on the first moving contact and the second moving contact, the vacuum interrupter and the disconnector can both be reset to the open state.

[0013] As an optional solution for sealing the pole, the isolating switch also includes a first elastic member, the first moving contact is provided with a mounting hole along the first direction, the inner wall of the mounting hole extends inward to form a first annular limit platform, the first elastic member is sleeved on the driving member, and one end of the first elastic member abuts against the limiting portion of the driving member, and the other end abuts against the first limit platform.

[0014] As an optional solution for sealing the pole, the first limit platform divides the mounting hole into a first cavity and a second cavity along the first direction, the first elastic member is placed in the first cavity, and an abutment portion is provided at the end of the driving member, the abutment portion is placed in the second cavity, and the abutment portion is used to push the guide rod along the first direction.

[0015] As an optional solution for sealing the pole, the isolating switch further comprises a moving contact finger, the moving contact finger is arranged in the second cavity, and the moving contact finger is used to contact the circumferential outer wall of the guide rod.

[0016] As an optional solution for the sealed pole, a static contact finger is provided on the inner wall of the first static contact, and when the first moving contact moves to a preset position along the first direction, the outer wall of the first moving contact contacts the static contact finger to switch the disconnector to a closed state.

[0017] As an optional solution for sealing the pole, the vacuum arc chamber includes a mounting seat arranged in the mounting cavity and a second elastic member arranged inside the mounting seat, the guide rod passes through the mounting seat along the first direction, one end of the second elastic member abuts against the bottom wall of the mounting seat, and the other end abuts against a second limit platform arranged on the guide rod, and the second elastic member is used to reset the vacuum arc chamber to the open state.

[0018] As an optional solution for sealing the pole, the disconnector and the vacuum interrupter are sealed in the installation cavity by pouring epoxy resin.

[0019] A switchgear, comprising a sealed pole as described in any of the above solutions, and

[0020] Cabinet;

[0021] An operating mechanism is arranged in the cabinet;

[0022] A transmission mechanism, one end of which is connected to the operating mechanism, and the other end of which is transmission-connected to the driving member.

[0023] As an optional scheme for a switching device, the transmission mechanism includes a main gear, a slave gear and a cam, the main gear meshes with the slave gear for transmission, the cam is connected to the slave gear, and the cam is connected to the driving member; the operating mechanism is used to drive the main gear to rotate, so that the slave gear drives the cam to rotate, and the cam drives the driving member to move along the first direction.

[0024] As an optional solution of the switch device, the switch device further includes a first conductive group and a second conductive group, the first conductive group is electrically connected to the first static contact, and the second conductive group is electrically connected to the second static contact.

[0025] Beneficial effects:

[0026] In the first aspect of the present invention, by adopting a built-in setting method of the isolating switch, and sealing the isolating switch and the vacuum arc chamber inside the body, the structure of the entire switch device can be made compact and have a miniaturized structural feature, which can meet the miniaturized design requirements of the switch device and improve the adaptability of the sealed pole. In addition, the linkage of the closing and opening actions of the isolating switch and the vacuum arc chamber is achieved through the driving component, which meets the principle of safe operation of the power grid system: when the isolating switch closes or opens the circuit, it must ensure that there is no current in the circuit (that is, no load). At the same time, the sealed pole further realizes the double-break insulation of vacuum and isolation through the vacuum arc chamber and the isolating switch, which effectively improves the insulation performance of the overall sealed pole.

[0027] In the second aspect of the present invention, the switch device based on the sealed pole can meet the design requirements of miniaturization while improving insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of a switch device provided by an embodiment of the present invention;

[0029] Figure 2 is a cross-sectional view of a switchgear provided by an embodiment of the present invention in which both the isolating switch and the vacuum interrupter are placed in an open state;

[0030] Figure 3 It is a schematic diagram of the state when the driving member and the guide rod begin to contact each other after the isolating switch is closed, provided by an embodiment of the present invention;

[0031] Figure 4 yes Figure 3A local enlarged view at point A;

[0032] Figure 5 It is a schematic diagram of the state of the overall switch device when the vacuum interrupter is closed after the vacuum interrupter is closed, provided in this embodiment of the present invention.

[0033] In the figure:

[0034] X, first direction;

[0035] 100, cabinet; 200, operating mechanism; 300, transmission mechanism; 310, main gear; 320, slave gear; 330, cam; 340, transmission shaft; 400, first conductive group; 410, cable head; 420, conductive row; 500, second conductive group;

[0036] 1. driving member; 11. limiting portion; 12. abutting portion;

[0037] 2. body; 21. mounting cavity;

[0038] 3. Isolating switch; 31. First static contact; 32. First moving contact; 321. Mounting hole; 3211. First cavity; 3212. Second cavity; 322. First limit table; 33. First elastic member; 34. Moving contact finger; 35. Static contact finger;

[0039] 4. vacuum arc extinguishing chamber; 41. guide rod; 411. second limit platform; 42. second moving contact; 43. second static contact; 44. mounting seat; 441. sliding hole; 442. through hole; 45. second elastic member. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] Please see attached Figure 1 -Attached Figure 5 A first aspect of this embodiment relates to a sealed pole, which includes a driving member 1, a body 2, a disconnector 3 and a vacuum interrupter 4. Among them, the body 2 is provided with an installation cavity 21 along the first direction X; the isolating switch 3 is placed in the installation cavity 21, the isolating switch 3 includes a first static contact 31 and a first moving contact 32 that can move along the first direction X, and the driving member 1 is transmission-connected with the first moving contact 32; the vacuum arc chamber 4 is placed in the installation cavity 21, the vacuum arc chamber 4 includes a guide rod 41, a second moving contact 42 and a second static contact 43; the second moving contact 42 is arranged at an end of the guide rod 41 away from the isolating switch 3, and the second static contact 43 is fixed in the installation cavity 21; the driving member 1 can push the first moving contact 32 to switch the isolating switch 3 to the closed state, and the driving member 1 can continue to push the guide rod 41 to switch the vacuum arc chamber 4 to the closed state. When the isolating switch 3 and the vacuum arc chamber 4 remain in the closed state, the first moving contact 32 is electrically connected to the guide rod 41; when the driving member 1 releases the thrust of the first moving contact 32 and the second moving contact 42, the vacuum arc chamber 4 and the isolating switch 3 can be reset to the open state.

[0045] Specifically, the body 2 is a hollow cylindrical body, the installation cavity 21 is a cylindrical cavity opened in the body 2 along the first direction X, the disconnector 3 and the vacuum interrupter 4 are arranged in the installation cavity 21 in sequence in the vertical direction, and are sealed in the installation cavity 21 by epoxy resin casting, so that the entire sealed pole forms a modular structure. Further, the driving member 1 is a rod-shaped member with insulating properties, and the driving member 1 is inserted into the installation cavity 21 along the first direction X.

[0046] The following takes the vertical arrangement of the sealed poles as an example to explain the closing and opening operation principles of the disconnector 3 and the vacuum interrupter 4.

[0047] When the driving member 1 moves vertically downward, the driving member 1 drives the first moving contact 32 to slide downward, and the first moving contact 32 moves to a certain position, and the first moving contact 32 is electrically contacted with the first static contact 31, so that the disconnector 3 is switched to the closed state. When the first moving contact 32 no longer moves downward, the driving member 1 just contacts the guide rod 41, and the disconnector 3 has completed the closing operation, and the first moving contact 32 is fully in contact with the guide rod 41, and can maintain electrical connection to carry the rated current. Further, when the driving member 1 continues to move downward to a certain position, the driving member 1 can contact the guide rod 41, the driving member 1 continues to move downward and squeeze the guide rod 41, and the guide rod 41 moves downward and drives the second moving contact 42 to contact the second static contact 43, so that the vacuum interrupter 4 is switched to the closed state. At this time, the driving member 1 is separated from the first moving contact 32 of the disconnector 3, and a certain gap value is generated. The opening process is the reverse process of the above-mentioned closing process. Specifically, the driving member 1 moves upward, first eliminating the gap between the driving member 1 and the first moving contact 32. Further, when the thrust of the vacuum interrupter 4 is released, the guide rod 41 can move upward, and the second moving contact 42 is separated from the second static contact 43, thereby realizing the opening of the vacuum interrupter 4; then, the driving member 1 continues to move upward and drives the first moving contact 32 to release the electrical contact with the first static contact 31, thereby realizing the opening operation of the disconnector 3.

[0048] By adopting a built-in setting of the isolating switch 3 and sealing the isolating switch 3 and the vacuum arc chamber 4 inside the body 2, the structure of the entire switch device can be made compact and have a miniaturized structural feature, which can meet the miniaturized design requirements of the switch device and improve the adaptability of the sealed pole. In addition, the linkage of the closing and opening actions of the isolating switch 3 and the vacuum arc chamber 4 is achieved through the driving component 1, which meets the principle of safe operation of the power grid system: when the isolating switch 3 closes or opens the circuit, it must ensure that there is no current in the circuit (that is, no load). At the same time, the sealed pole further realizes the double-break insulation of vacuum and isolation through the vacuum arc chamber 4 and the isolating switch 3, which effectively improves the insulation performance of the overall sealed pole.

[0049] Optionally, the isolating switch 3 also includes a first elastic member 33, the first moving contact 32 is provided with a mounting hole 321 along the first direction X, the inner wall of the mounting hole 321 extends inward to form a first annular limit platform 322, the first elastic member 33 is sleeved on the driving member 1, and one end of the first elastic member 33 abuts against the limiting portion 11 of the driving member 1, and the other end abuts against the first limit platform 322.

[0050] Specifically, the first moving contact 32 is provided with a cylindrical mounting hole 321 in the first direction X, and a first limit platform 322 is formed inwardly along the inner wall near the middle of the mounting hole 321. The first elastic member 33 is a standard spring. At the same time, an annular limit portion 11 is protruded outwardly on the outer wall of the driving member 1. The first elastic member 33 is sleeved on the driving member 1, and the two ends of the first elastic member 33 along the first direction X are respectively abutted against the end surface of the limit portion 11 and the end surface of the first limit platform 322. When closing the switch, when the driving member 1 moves vertically downward, the driving member 1 acts on the first elastic member 33 and uses the first elastic member 33 to squeeze the first limit platform 322 until the disconnector 3 is closed. At this time, the first elastic member 33 is squeezed, and a certain gap value is generated between the first moving contact 32 and the driving member 1. When the switch is opened, when the driving member 1 moves in the reverse direction, the first elastic member 33 can make the driving member 1 contact the first moving contact 32 again and eliminate the gap value, so as the driving member 1 continues to move upward, the first moving contact 32 is driven to reset.

[0051] Furthermore, the first limit platform 322 divides the mounting hole 321 into a first cavity 3211 and a second cavity 3212 along the first direction X, the first elastic member 33 is disposed in the first cavity 3211, and an abutment portion 12 is provided at the end of the driving member 1, and the abutment portion 12 is disposed in the second cavity 3212, and the abutment portion 12 is used to push the guide rod 41 along the first direction X.

[0052] Specifically, the mounting hole 321 is divided into a first cavity 3211 located at the upper part and a second cavity 3212 located at the lower part by a first limit platform 322. The first limit platform 322 is annular, and a through hole is formed in the middle for the driving member 1 to pass through. The free end of the driving member 1 forms a cylindrical abutment portion 12, and the diameter of the abutment portion 12 is larger than the diameter of the through hole, so that when the disconnector 3 is opened, the driving member 1 squeezes the first limit platform 322 during the return stroke to reset the first moving contact 32.

[0053] Optionally, the isolating switch 3 further includes a moving contact finger 34 , which is arranged in a ring in the second cavity 3212 , and is used to contact the circumferential outer wall of the guide rod 41 .

[0054] In this embodiment, the moving contact finger 34 is an annular elastic conductive structure. The moving contact finger 34 is arranged inside the annular groove formed on the inner wall of the second cavity 3212. The moving contact finger 34 is used to form an elastic extrusion contact with the guide rod 41, thereby ensuring that the first moving contact 32 forms a stable electrical connection with the circumferential outer wall of the guide rod 41.

[0055] Optionally, a stationary contact finger 35 is provided on the inner wall of the first stationary contact 31, and when the first moving contact 32 moves to a preset position along the first direction X, the outer wall of the first moving contact 32 contacts the stationary contact finger 35, so that the disconnector 3 is switched to the closed state.

[0056] Specifically, the first static contact 31 is also a hollow structure, the first moving contact 32 is slidably arranged in the inner cavity of the first static contact 31, and a positioning groove for installing an annular static contact finger 35 is opened on the inner wall near the bottom of the first static contact 31. The static contact finger 35 is also an annular elastic conductive structure. When the first moving contact 32 gradually moves downward, the conductive part of the first moving contact 32 squeezes and contacts the static contact finger 35, thereby realizing that the disconnector 3 is switched to the closed state.

[0057] Optionally, the vacuum arc chamber 4 includes a mounting seat 44 arranged in the mounting cavity 21 and a second elastic member 45 placed inside the mounting seat 44, and the guide rod 41 passes through the mounting seat 44 along the first direction X. One end of the second elastic member 45 abuts against the bottom wall of the mounting seat 44, and the other end abuts against a second limit platform 411 arranged on the guide rod 41. The second elastic member 45 is used to reset the vacuum arc chamber 4 to the open state.

[0058] Specifically, the mounting seat 44 is fixed inside the mounting cavity 21, and the second elastic member 45 can also be an ordinary spring. The second elastic member 45 is sleeved on the guide rod 41 and placed inside the mounting seat 44. A second limit platform 411 is formed on the guide rod 41 to protrude outward. The mounting seat 44 passes through in the vertical direction, and a sliding hole 441 is formed near the top, and a through hole 442 is formed near the bottom. The guide rod 41 passes through the sliding hole 441 and the through hole 442 in sequence. The second limit platform 411 is slidably set in the sliding hole 441, and the two ends of the second elastic member 45 respectively abut against the second limit platform 411 and the lower bottom wall of the mounting seat 44, that is, the inner bottom wall near the through hole 442.

[0059] When the vacuum interrupter 4 is closed, the driving member 1 squeezes the guide rod 41 downward, the second limit platform 411 slides downward along the sliding hole 441, and squeezes the second elastic member 45 to store energy. When the vacuum interrupter 4 is opened, the second elastic member 45 can push the guide rod 41 in the reverse direction to move upward and reset, thereby separating the second moving contact 42 from the second static contact 43.

[0060] The second aspect of this embodiment also relates to a switch device, which includes the above-mentioned sealed pole, cabinet 100, operating mechanism 200 and transmission mechanism 300, wherein one end of the transmission mechanism 300 is connected to the operating mechanism 200, and the other end of the transmission mechanism 300 is transmission-connected to the driving member 1.

[0061] Specifically, the cabinet 100 is in a cubic shape, the operating mechanism 200 is an existing conventional structure, and there are multiple transmission connection modes between the operating mechanism 200 and the transmission mechanism 300. In this embodiment, the transmission mechanism 300 includes a main gear 310, a slave gear 320 and a cam 330. The main gear 310 is meshed with the slave gear 320 for transmission, the cam 330 is connected with the slave gear 320, and the cam 330 is transmission-connected with the driving member 1; the operating mechanism 200 is used to drive the main gear 310 to rotate, so that the slave gear 320 drives the cam 330 to rotate, and the cam 330 drives the driving member 1 to move along the first direction X.

[0062] Specifically, the main gear 310 and the slave gear 320 are both of the bevel gear meshing transmission type to adapt to the relative position and arrangement of the operating mechanism 200 and the sealed pole. The operating mechanism 200 drives the main gear 310 to rotate through the transmission shaft 340, and the main gear 310 drives the slave gear 320 to rotate according to the meshing transmission relationship. The slave gear 320 is coaxial with the cam 330, so the cam 330 is further rotated. A slide groove is provided on the cam 330, and one end of the driving member 1 is slidably arranged in the slide groove through a guide column. As the cam 330 rotates, the inner wall of the slide groove squeezes the guide column, driving the driving member 1 to move in the vertical direction. Those skilled in the art can understand that by converting the rotation direction of the transmission shaft 340 by the operating mechanism 200, the sealed pole can be switched between the closing operation and the opening operation.

[0063] Optionally, the switch device further includes a first conductive group 400 and a second conductive group 500 , wherein the first conductive group 400 is electrically connected to the first stationary contact 31 , and the second conductive group 500 is electrically connected to the second stationary contact 43 .

[0064] In this embodiment, the first conductive group 400 is located below the operating mechanism 200, and the first conductive group 400 includes a cable head 410 and a conductive bar 420 placed beside the sealed pole, wherein the cable head 410 is electrically connected to one end of the conductive bar 420, and the other end of the conductive bar 420 is electrically connected to a structure where a part of the structure of the first static contact 31 extends out of the body 2. The second conductive group 500 is located at the end of the sealed pole, and the second conductive group 500 can use a conductive cable connector to achieve electrical connection with the conductive member led out of the second static contact 43.

[0065] The switchgear forms a conductive loop through the first conductive group 400, the second conductive group 500 and the sealed pole to transmit current. The switchgear can meet the requirements of high voltage of 24kV, rated current of 630A, rated short-circuit breaking current of 16kA, three-phase AC electrical system, and the mechanical life reaches 10,000 times. The isolating switch 3 can meet the rated current of 630A, 16kA short-time withstand current, and 32.5kA peak withstand current.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sealed pole, characterized in that: include: A driving member (1); A body (2), wherein the body (2) is provided with a mounting cavity (21) along a first direction (X); An isolating switch (3) is placed in the installation cavity (21), the isolating switch (3) comprises a first stationary contact (31) and a first moving contact (32) movable along the first direction (X), the driving member (1) being in transmission connection with the first moving contact (32); A vacuum interrupter (4) is disposed in the installation cavity (21), and the vacuum interrupter (4) comprises a guide rod (41), a second moving contact (42) and a second stationary contact (43); the second moving contact (42) is disposed at an end of the guide rod (41) away from the disconnector (3), and the second stationary contact (43) is fixed in the installation cavity (21); The driving member (1) can push the first moving contact (32) to switch the isolating switch (3) to a closed state, and the driving member (1) can continue to push the guide rod (41) to switch the vacuum interrupter (4) to a closed state. When the isolating switch (3) and the vacuum interrupter (4) remain in the closed state, the first moving contact (32) is electrically connected to the guide rod (41); when the driving member (1) releases the thrust on the first moving contact (32) and the second moving contact (42), the vacuum interrupter (4) and the isolating switch (3) can both be reset to an open state.

2. The sealed pole according to claim 1, characterized in that: The isolating switch (3) further comprises a first elastic member (33); the first moving contact (32) is provided with a mounting hole (321) along the first direction (X); the inner wall of the mounting hole (321) extends inward to form a first annular limiting platform (322); the first elastic member (33) is sleeved on the driving member (1); one end of the first elastic member (33) abuts against the limiting portion (11) of the driving member (1), and the other end abuts against the first limiting platform (322).

3. The sealed pole according to claim 2, characterized in that: The first limiting platform (322) divides the mounting hole (321) into a first cavity (3211) and a second cavity (3212) along the first direction (X); the first elastic member (33) is disposed in the first cavity (3211); an abutment portion (12) is provided at the end of the driving member (1); the abutment portion (12) is disposed in the second cavity (3212); and the abutment portion (12) is used to push the guide rod (41) along the first direction (X).

4. The sealed pole according to claim 3, characterized in that: The isolating switch (3) further comprises a moving contact finger (34), wherein the moving contact finger (34) is arranged in a ring in the second cavity (3212), and the moving contact finger (34) is used to contact the circumferential outer wall of the guide rod (41).

5. The sealed pole according to claim 1, characterized in that: A stationary contact finger (35) is provided on the inner wall of the first stationary contact (31); when the first moving contact (32) moves to a preset position along the first direction (X), the outer wall of the first moving contact (32) contacts the stationary contact finger (35), so that the isolating switch (3) is switched to a closed state.

6. The sealed pole according to claim 1, characterized in that: The vacuum interrupter (4) comprises a mounting seat (44) arranged in the mounting cavity (21) and a second elastic member (45) arranged inside the mounting seat (44); the guide rod (41) passes through the mounting seat (44) along the first direction (X); one end of the second elastic member (45) abuts against the bottom wall of the mounting seat (44) and the other end abuts against a second limit platform (411) arranged around the guide rod (41); the second elastic member (45) is used to reset the vacuum interrupter (4) to an open state.

7. The sealed pole according to any one of claims 1 to 6, characterized in that: The isolating switch (3) and the vacuum interrupter (4) are sealed in the installation cavity (21) by epoxy resin casting.

8. A switchgear, characterized in that The method comprises the sealed pole according to any one of claims 1 to 7, and Cabinet (100); An operating mechanism (200) is disposed in the cabinet (100); A transmission mechanism (300), one end of the transmission mechanism (300) is connected to the operating mechanism (200), and the other end of the transmission mechanism (300) is transmission-connected to the driving member (1).

9. The switchgear according to claim 8, characterized in that The transmission mechanism (300) comprises a main gear (310), a slave gear (320) and a cam (330); the main gear (310) is meshed with the slave gear (320) for transmission; the cam (330) is connected to the slave gear (320); and the cam (330) is transmission-connected to the driving member (1); the operating mechanism (200) is used to drive the main gear (310) to rotate, so that the slave gear (320) drives the cam (330) to rotate, and the cam (330) drives the driving member (1) to move along the first direction (X).

10. The switchgear according to claim 8, characterized in that The switch device further comprises a first conductive group (400) and a second conductive group (500), wherein the first conductive group (400) is electrically connected to the first stationary contact (31), and the second conductive group (500) is electrically connected to the second stationary contact (43).

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