Gas insulated switchgear

Abstract

A gas insulated switchgear comprises three electrical switches (10) and a three-phase mechanical linkage operating mechanism (20) arranged outside the three electrical switches (10), and is characterized in that the three-phase mechanical linkage operating mechanism (20) comprises a driving unit (21) comprising a first trigger motion part; the linkage unit (22) is driven by the driving unit (21), is used for actuating the three electrical switches (10) in a linkage manner so as to synchronously realize opening and closing, and comprises a second trigger motion part, and the gas insulated switchgear further comprises a first position detection switch for generating a first source switch position signal; the second position detection switch generates a second source switch position signal. According to the scheme of the invention, double confirmation can be carried out on the switching position of the gas insulated switchgear.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a gas insulated switchgear. BACKGROUND

[0002] Gas Insulated Switchgear (GIS) is widely used in various voltage level substations. The isolation grounding switch as an important part of GIS device plays an important role.

[0003] With the increasing requirement of the power system for operation safety, one-key control operation mode becomes a basic requirement. In order to realize the one-key operation module of the high-voltage substation, a new device needs to be designed to determine whether the isolation and grounding knife switch is in the closing or opening position, and to compare with the previous isolation or grounding knife switch stroke output by the auxiliary switch of the gas insulated switchgear to check the correctness of the other position. When the two signals are consistent, the control system of the power system can instruct the next operation.

[0004] How to realize safe and effective double confirmation of the switch position of the gas insulated switchgear is a problem faced by the industry.

[0005] The present disclosure proposes a gas insulated switchgear, which at least partially solves the shortcomings in the prior art. CONTENT OF THE INVENTION

[0006] One of the technical problems solved by the present disclosure is to provide a gas insulated switchgear, which can double confirm the switch position of the gas insulated switchgear to improve work safety.

[0007] To solve the above technical problems, the disclosure provides a kind of gas insulated switchgear, including three electrical switches for connecting three-phase power line respectively and one three-phase mechanical linkage operating mechanism arranged outside the three electrical switches, characterized in that: wherein, the three-phase mechanical linkage operating mechanism includes: drive unit, for providing operating power for the three-phase mechanical linkage operating mechanism, the drive unit includes the first trigger movement component reciprocating between two different positions;And linkage unit, driven by the drive unit, for linkage actuation the three electrical switches to achieve synchronous opening and closing, the linkage unit includes the second trigger movement component reciprocating between two different positions, wherein, the gas insulated switchgear further includes: first position detection switch, for cooperating with the first trigger movement component, different positions of the first trigger movement component are responded to generate first source switch position signal for indicating the switch position of the gas insulated switchgear;Second position detection switch, for cooperating with the second trigger movement component, different positions of the second trigger movement component are responded to generate second source switch position signal for indicating the switch position of the gas insulated switchgear.

[0008] In the scheme of the disclosure, by triggering the first position detection switch and the second position detection switch in the first trigger movement component and the second trigger movement component of the drive unit and the linkage unit respectively, two groups of different source switch position signals can be generated, so that the first source switch position signal and the second source switch position signal of different sources can be used together, and the switch position of the gas insulated switchgear is double confirmed. Therefore, using the scheme of the disclosure, the gas insulated switchgear and the power system can be controlled only on the basis of double confirmation, thereby ensuring the working safety of the switchgear and the power system.

[0009] Further, the drive unit includes: a drive shaft driven by a motor through an indirect transmission structure;Drive crank, the first end of the drive crank is connected to the drive shaft, so as to rotate around the drive shaft within a predetermined angle range under the drive of the drive shaft;And drive link, the first end of the drive link is connected to the second end of the drive crank, and the second end of the drive link is connected to the linkage unit, wherein the drive link oscillates around the second end of the drive crank while translating with the second end of the drive crank.

[0010] In the embodiment, through the cooperation of the drive crank and the drive link, the second end of the drive link can adapt to the position of the linkage unit while driving the linkage unit, so that the three-phase mechanical linkage operating mechanism moves more smoothly.

[0011] Further, the indirect transmission structure in the driving unit comprises a rack moving in a straight line and a gear wheel matched with the rack; the rack serves as the first trigger moving part; the gear wheel is fixedly arranged at one end of the driving shaft to make the driving shaft rotate; the gas insulated switchgear comprises an auxiliary switch, and the auxiliary switch serves as the first position detection switch.

[0012] In the embodiment, the rack moving in a straight line triggers the auxiliary switch, so that the first source switch position signal can be obtained in a balanced manner, and the occurrence of false signals is reduced.

[0013] Further, the linkage unit comprises: a linkage connecting rod connected to the driving unit and subjected to translation along the longitudinal direction of the linkage connecting rod under the driving of the driving unit; three linkage cranks and three linkage connecting rod shafts, the first ends of the three linkage cranks are connected to the linkage connecting rod through the corresponding linkage connecting rod shafts, and the three linkage connecting rod shafts are arranged equidistantly along a first straight line on the linkage connecting rod at a first interval; and three linkage crank shafts, which are fixedly arranged corresponding to the three electrical switches and directly or indirectly actuate the moving contact points arranged inside the corresponding electrical switches to move the moving contact points relative to the stationary contact points arranged inside the corresponding electrical switches between the closed position and the open position, and the three linkage crank shafts are arranged equidistantly along a second straight line at a second interval, wherein the first interval is equal to the second interval, and the first straight line is parallel to the second straight line.

[0014] In the embodiment, the above configuration makes the linkage unit form a parallelogram structure, so that the driving motion of the driving unit can be converted into the synchronous motion of the three linkage cranks and the linkage crank shafts, and the structure is simple and the motion is stable.

[0015] Further, the second trigger moving part is arranged on the linkage crank to swing with the linkage crank around the linkage crank shaft.

[0016] In the embodiment, since the second trigger moving part is arranged on the linkage crank, the second trigger moving part is closer to the breaking main shaft of the electrical switch relative to the first trigger moving part, so that the second position detection switch can more accurately reflect the switch position of the gas insulated switchgear, thereby better ensuring the accuracy of the double confirmation result and reducing system misjudgment.

[0017] Further, the second trigger moving part is a cam, the cam has a first cam part located at the first side of the linkage crank and a second cam part located at the second side of the linkage crank; and the second position detection switch is a micro switch, the micro switch comprises a first micro switch arranged corresponding to the first cam part and a second micro switch arranged corresponding to the second cam part.

[0018] In the embodiment, the second position detection switch can more accurately detect the opening and closing switch position of the gas insulated switchgear through the corresponding arrangement of the two cam parts and the two micro switches.

[0019] Further, the second trigger movement parts are three, respectively arranged on the three linkage cranks.

[0020] The second position detection switches are three, respectively arranged corresponding to the three second trigger movement parts.

[0021] In the embodiment, since the corresponding second trigger movement parts and the corresponding second position detection switches are respectively arranged corresponding to the three linkage cranks, the switch positions of the three electrical switches can be comprehensively detected, so that the switch position of the gas insulated switchgear can be more comprehensively double-confirmed.

[0022] Further, the gas insulated switchgear further comprises a first mounting bracket fixedly arranged at the rear side of the three electrical switches; the linkage unit is arranged at the rear side of the first mounting bracket; the gas insulated switchgear further comprises an opening and closing indicator, the opening and closing indicator comprises: a position pointer arranged on one of the three linkage cranks; a pointer window arranged on the first mounting bracket, so that a user can observe the position of the position pointer from the front side of the first mounting bracket.

[0023] In the embodiment, by arranging the first mounting bracket, the linkage unit can be reliably fixedly arranged, in addition, by arranging the opening and closing indicator, the user can conveniently observe the switch position of the gas insulated switchgear on site.

[0024] Further, the gas insulated switchgear further comprises a second mounting bracket arranged at the rear side of the first mounting bracket, arranged opposite to the first mounting bracket and fixedly connected, so that an accommodation space is formed between the second mounting bracket and the first mounting bracket; the linkage unit is accommodated in the accommodation space; the gas insulated switchgear further comprises a drive unit box fixedly connected at the rear side of the second mounting bracket; at least a part of the drive unit is arranged in the drive unit box, and the other part is located in the accommodation space.

[0025] In the embodiment, since the linkage unit is arranged in the accommodation space defined by the first mounting bracket and the second mounting bracket, and different parts of the drive unit are respectively located in the accommodation space and the drive unit box, the first mounting bracket and the second mounting bracket and the drive unit box can provide protection for the drive unit and the linkage unit.

[0026] Further, the gas insulated switchgear further comprises a third mounting bracket arranged at the rear side of the first mounting bracket, oppositely arranged and fixedly connected with the first mounting bracket, and arranged side by side with the second mounting bracket along the extension direction of the first mounting bracket, so that the second mounting bracket and the third mounting bracket together form the containing space with the first mounting bracket; and the gas insulated switchgear further comprises a terminal box fixedly connected at the rear side of the third mounting bracket, and the second position detection switch is connected to the terminal box through a lead wire.

[0027] In the embodiment, by arranging the third mounting bracket and the terminal box, the linkage unit can be better protected and the connection operation of the second position detection switch is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of the present disclosure, illustrate embodiments of the present disclosure and serve to explain the present disclosure together with the description. In the drawings, some structures are not shown for the sake of clear display of relevant structures. In the drawings:

[0029] Figure 1 is a perspective structural schematic diagram of a gas insulated switchgear according to an embodiment of the present disclosure;

[0030] Figure 2 is Figure 1 is another perspective structural schematic diagram of the gas insulated switchgear in

[0031] Figure 3 is Figure 1 is another partial perspective structural schematic diagram of the gas insulated switchgear in

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 10, electrical switch; 11, switch housing;

[0034] 20, three-phase mechanical linkage operating mechanism;

[0035] 21, driving unit; 211, driving pivot; 212, driving crank;

[0036] 213, driving connecting rod;

[0037] 22, linkage unit; 221, linkage connecting rod; 222, linkage crank;

[0038] 223, linkage connecting rod shaft; 224, linkage crank pivot; 225, cam;

[0039] 225a, first cam portion; 225b, second cam portion;

[0040] 31, first mounting bracket; 32, second mounting bracket; 33, third mounting bracket;

[0041] 42, drive unit box; 43, terminal block;

[0042] 50, opening / closing indicator; 51, position pointer; 52, pointer window;

[0043] S1, first micro switch; S2, second micro switch. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The description of the at least one exemplary embodiment below is actually only illustrative, but not as any limitation on the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0045] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0046] First, referring to Figure 1 , 2 and 3. Figure 1 is a perspective structural schematic diagram of a gas insulated switchgear according to an embodiment of the present disclosure; Figure 2 is another perspective structural schematic diagram of the gas insulated switchgear in Figure 1 , in which part of the structure is removed for clear display; Figure 3 is a partial perspective structural schematic diagram of the gas insulated switchgear in Figure 1 from another viewing angle. In the present disclosure, as viewed from the viewing angle shown in Figure 1 and Figure 2 , the direction toward the observer (i.e. the outer side of the paper) is the back, and the opposite direction (i.e. the inner side of the paper) is the front; as viewed from the viewing angle shown in Figure 3 , Figure 3 , the left side is the back and the right side is the front.

[0047] The gas insulated switchgear of the present disclosure comprises three electrical switches 10 and a three-phase mechanical linkage operating mechanism 20. The three electrical switches 10 are respectively used for connecting three-phase power lines, and are the main body of the gas insulated switchgear. Each electrical switch 10 has a switch housing 11 and a stationary contact and a movable contact arranged inside the switch housing 11. The three-phase mechanical linkage operating mechanism 20 is arranged outside the three electrical switches 10, and can linkage-operate the three electrical switches to move the movable contact inside each electrical switch relative to the stationary contact between two positions, so as to synchronously perform opening and closing operations of the three electrical switches.

[0048] With reference to Figure 1 and Figure 3 , the gas insulated switchgear further comprises a first mounting bracket 31 arranged outside the three electrical switches 10, and a second mounting bracket 32 and a third mounting bracket 33 arranged at the rear side of the first mounting bracket 31 and fixedly connected with the first mounting bracket 31. The third mounting bracket 33 is arranged side by side with the second mounting bracket 32 along the extension direction of the first mounting bracket 31, so that the second mounting bracket 32 and the third mounting bracket 33 together form a containing space with the first mounting bracket 31.

[0049] From Figure 1 and Figure 3 , it can be seen that the gas insulated switchgear further comprises a drive unit box 42 mounted at the rear side of the second mounting bracket 32 and a wiring terminal box 43 mounted at the rear side of the third mounting bracket 33.

[0050] With reference to Figures 1 to 3 , it can be seen that the three-phase mechanical linkage operating mechanism 20 comprises a drive unit 21 and a linkage unit 22.

[0051] The drive unit 21 is located at the upstream end of the three-phase mechanical linkage operating mechanism for providing operating power for the three-phase mechanical linkage operating mechanism. The operating power is synchronously transmitted to the execution elements inside the three electrical switches 10 through the linkage unit 22 located at the downstream end of the three-phase mechanical linkage operating mechanism to synchronously perform opening and closing actions of the electrical switches. In the present disclosure, the "upstream end" and "downstream end" refer to the transmission direction.

[0052] In order to realize double confirmation of the switching position of the gas insulated switchgear, so as to facilitate the corresponding control operation of the power system, in the scheme of the present disclosure, a first position detection switch is arranged at the upstream end of the three-phase linkage operating mechanism, and a second position detection switch is arranged at the downstream end of the three-phase linkage operating mechanism. Correspondingly, the driving unit 21 includes a first trigger movement component reciprocating between two different positions, and the linkage unit 22 includes a second trigger movement component reciprocating between two different positions. The first position detection switch is used to cooperate with the first trigger movement component, and a first source switching position signal indicating the switching position of the gas insulated switchgear is generated in response to the different positions of the first trigger movement component. The second position detection switch is used to cooperate with the second trigger movement component, and a second source switching position signal indicating the switching position of the gas insulated switchgear is generated in response to the different positions of the second trigger movement component.

[0053] In the scheme of the present disclosure, by triggering the first position detection switch and the second position detection switch through the first trigger movement component and the second trigger movement component of the driving unit 21 and the linkage unit 22 respectively, two groups of different source switching position signals can be generated, so that the first source switching position signal and the second source switching position signal of different sources can be used together to double confirm the switching position of the gas insulated switchgear. Therefore, using the scheme of the present disclosure, the corresponding control operation of the gas insulated switchgear and the power system can be performed only on the basis of double confirmation, thereby ensuring the working safety of the switchgear and the power system.

[0054] For reference Figures 1 to 3 In the embodiment of the present disclosure, the driving unit 21 includes a motor (not shown), an indirect transmission structure (not shown), a driving shaft 211, a driving crank 212 and a driving link 213. The motor and the indirect transmission structure of the driving unit are arranged in the driving unit box 42, the first end of the driving shaft 211 is arranged in the driving unit box 42, the second end extends forward into the accommodation space, and the driving crank 212 and the driving link 213 are arranged in the accommodation space.

[0055] The motor of the driving unit 21 drives the shaft 211 through the indirect transmission structure, the first end of the driving crank 212 is connected to the driving shaft 211, the second end is connected to the first end of the driving link 213, and the second end of the driving link 213 is connected to the linkage unit 22. The driving crank 212 rotates around the driving shaft 211 within a predetermined angle range under the drive of the driving shaft 211, so that the second end of the driving crank 212 drives the first end of the driving link 213 to move together, so that the driving link 213 swings around the second end of the driving crank 212 while translating with the second end of the driving crank 212.

[0056] The indirect transmission structure of the driving unit 21 can comprise a speed reducer (not shown) or a rack and pinion structure (not shown), the rack of which can reciprocate along a guide rod (not shown) fixedly arranged in the driving unit box 42, thereby driving the matched gear to reciprocate. The gear can be fixedly arranged at one end of the driving shaft 211 to drive the driving shaft 211 to reciprocate.

[0057] In the embodiment, the cooperation of the driving crank 212 and the driving connecting rod 213 enables the second end of the driving connecting rod 213 to adapt to the position of the linkage unit 22 while driving the linkage unit 22, thereby making the three-phase mechanical linkage operation mechanism move more smoothly.

[0058] Preferably, the first position detection switch can be an auxiliary switch (not shown) of the gas insulated switchgear, which can be arranged in the driving unit box 42 and triggered by the movement of the driving unit 21. More specifically, the first triggering movement component can be the rack in the rack and pinion mechanism, and the auxiliary switch can be matched with the reciprocating rack to generate a first source switch position signal for indicating the switch position of the gas insulated switchgear in response to different positions of the rack.

[0059] In the embodiment, the rack with reciprocating movement triggers the auxiliary switch, which can balance the first source switch position signal and reduce the occurrence of false signals.

[0060] In combination with Figures 1 to 3 The linkage unit 22 comprises a linkage connecting rod 221 and three linkage cranks 222, three linkage connecting rod shafts 223 and three linkage crank shafts 224 corresponding to the three electrical switches 10 respectively. The linkage connecting rod 221 is connected to the driving unit 21 and extends along the arrangement direction of the three electrical switches 10. The linkage connecting rod 221 is driven by the driving unit 21 to translate along the longitudinal direction of the linkage connecting rod 221, i.e. the arrangement direction of the three electrical switches 10.

[0061] The first ends of the three linkage cranks 222 are respectively connected to the linkage connecting rod 221 through the corresponding linkage connecting rod shafts 223, and the three linkage connecting rod shafts 223 are arranged at first intervals along a first straight line on the linkage connecting rod 221.

[0062] The three linkage crank shafts 224 are respectively fixedly arranged corresponding to the three electrical switches 10 and can extend into the three electrical switches to serve as the breaking main shafts of the electrical switches, or can be indirectly connected to the breaking main shafts of the electrical switches. In this way, the linkage crank shafts 224 can directly or indirectly actuate the movable contacts arranged in the corresponding electrical switches 10 to move between the closing position and the opening position relative to the fixed contacts arranged in the corresponding electrical switches 10.

[0063] The three linked crank shafts 224 are arranged at equal intervals along the second straight line at a second interval, wherein the first interval is equal to the second interval, and the first straight line is parallel to the second straight line.

[0064] In this embodiment, through the above configuration, the linkage unit 22 forms a parallelogram structure, so that the driving motion of the driving unit 21 can be converted into the synchronous motion of the three linkage cranks 222 and the linkage crank shaft 224, which has a simple structure and smooth motion.

[0065] Preferably, the second triggering moving component can be provided on the linkage crank 222 to swing around the linkage crank shaft 224 along with the linkage crank 222 .

[0066] In this embodiment, since the second trigger moving component is arranged on the linkage crank 222, it is closer to the fracture main axis of the electrical switch than the first trigger moving component, so that the second position detection switch can more accurately reflect the switch position of the gas-insulated switchgear, thereby better ensuring the accuracy of the double confirmation result and reducing system misjudgment.

[0067] See also Figure 1 and Figure 2 The linkage unit 22 also includes a cam 225, which serves as a second triggering motion component. Cam 225 has a first cam portion 225a located on a first side of the linkage crank 222 along the swing direction of the linkage crank 222, and a second cam portion 225b located on a second side of the linkage crank 222. A first microswitch S1 and a second microswitch S2 are also provided on the rear side of the first mounting bracket 31. The first microswitch S1 corresponds to the first cam portion 225a, and the second microswitch S2 corresponds to the second cam portion 225b.

[0068] In this embodiment, by using two micro switches as the second position detection switches, which are respectively corresponding to the two cam parts of the cam 225 as the second triggering moving part, the second position detection switch can more accurately detect the opening and closing switch positions of the gas-insulated switchgear.

[0069] Continue to see Figure 1 and Figure 2 , there are three second triggering moving parts (cams 225), which are respectively arranged on the three linked cranks 222;

[0070] There are three second position detection switches (micro switches, including a first micro switch S1 and a second micro switch S2 ), which are respectively provided corresponding to the three second trigger moving parts.

[0071] In the embodiment, since the second trigger movement component and the second position detection switch corresponding to the three linkage cranks 222 are arranged respectively, the switch positions of the three electrical switches 10 can be detected comprehensively, so that the switch positions of the gas insulated switchgear can be double-confirmed more comprehensively.

[0072] From Figures 1 to 3 It can be seen that the linkage unit 22 is arranged at the rear side of the first mounting bracket 31; the gas insulated switchgear further comprises an opening and closing indicator 50, which comprises a position pointer 51 arranged on one of the three linkage cranks 222, and a pointer window 52 arranged on the first mounting bracket 31, so that a user can observe the position of the position pointer 51 from the front side of the first mounting bracket 31.

[0073] In the embodiment, the first mounting bracket 31 is arranged to reliably fix the linkage unit 22, and the opening and closing indicator 50 is arranged to enable a user to conveniently observe the switch position of the gas insulated switchgear on site.

[0074] From Figure 3 It can also be seen that the linkage unit 22 is arranged in an accommodation space defined by the first mounting bracket 31, the second mounting bracket 32 and the third mounting bracket 33, and different parts of the drive unit 21 are respectively located in the accommodation space and the drive unit box, so that the first mounting bracket 31 and the second mounting bracket 32 and the drive unit box 42 can provide protection for the drive unit 21 and the linkage unit 22.

[0075] Preferably, the gas insulated switchgear further comprises a terminal box 43 fixedly connected at the rear side of the third mounting bracket 33, and the second position detection switch is connected to the terminal box 43 through a lead wire.

[0076] In the embodiment, the third mounting bracket 33 and the terminal box 43 are arranged to better protect the linkage unit 22 and facilitate the connection operation of the second position detection switch.

[0077] The gas insulated switchgear of the present disclosure can be a grounding switchgear or an isolating switchgear according to different line connections and actions.

[0078] The operation mode of the gas insulated switchgear of the present disclosure is as follows: the drive unit 21 of the three-phase mechanical linkage operating mechanism triggers the auxiliary switch, so that the auxiliary switch provides a knife switch position signal (a first source switch position signal) represented by the position of the trigger movement part (a first trigger movement part) of the drive unit. At the same time, the isolation or grounding knife switch is at the open position, and the open micro switch (a second micro switch S2) outputs an open switch signal through the NO contact (normally open contact) at this time. If it is assumed that the drive unit 21 of the three-phase mechanical linkage operating mechanism drives the linkage connecting rod 221 and the linkage crank 222 of the linkage unit 22, and further drives the rotating shaft (the linkage crank rotating shaft 224) to rotate counterclockwise to the isolation or grounding closing position, then the cam 225 also rotates counterclockwise by a small angle, and the compression signal output point of the open micro switch (the second micro switch S2) is separated, so that the open signal output disappears. The cam 225 continues to rotate counterclockwise to the closing angle, thereby pushing the closing micro switch (the first micro switch S1) to output a closing signal. Similarly, the drive unit 21 of the three-phase mechanical linkage operating mechanism drives the linkage connecting rod 221 and the linkage crank 222 of the linkage unit 22, and further drives the rotating shaft (the linkage crank rotating shaft 224) to rotate clockwise, so that the cam 225 rotates clockwise by a small angle, and the compression signal output point of the closing micro switch (the first micro switch S1) is separated, so that the closing signal output disappears. The cam 225 continues to rotate clockwise to the open angle, thereby pushing the open micro switch (the second micro switch S2) to output an open signal through the NO contact, thereby realizing the closing and opening of the isolation and grounding knife switch. The second non-homogeneous knife switch position signal (the second source switch position signal) is output.

[0079] The technical effects of the present disclosure are as follows: by providing two position switch signals, one-key sequence control isolation and grounding double-position confirmation can be met, two position signals confirm different sources, and the micro switch signal is as close as possible to the output main shaft of the isolation and grounding breaking point. The requirement can better ensure the safety of equipment operation.

[0080] The above is only the preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present disclosure. These improvements and refinements should also be considered within the scope of protection of the present disclosure.

Claims

1. A gas-insulated switchgear comprising three electrical switches (10) for connecting three-phase power lines, respectively, and a three-phase mechanical linkage operating mechanism (20) arranged outside the three electrical switches (10), Its characteristics are: Wherein, the three-phase mechanical linkage operating mechanism (20) comprises: A drive unit (21) for providing operating power to the three-phase mechanical linkage operating mechanism, the drive unit (21) comprising a first triggering moving component that reciprocates between two different positions; and A linkage unit (22) is driven by the drive unit (21) and is used to actuate the three electrical switches (10) in a linked manner to synchronously realize opening and closing. The linkage unit (22) includes a second triggering moving part that reciprocates between two different positions. Wherein, the gas insulated switchgear further comprises: a first position detection switch, configured to cooperate with the first trigger moving component and generate a first source switch position signal indicating a switch position of the gas-insulated switchgear in response to different positions of the first trigger moving component; The second position detection switch is used to cooperate with the second trigger moving component and generate a second source switch position signal indicating the switch position of the gas-insulated switchgear in response to different positions of the second trigger moving component.

2. The gas insulated switchgear according to claim 1, characterized in that The driving unit (21) comprises: A driving shaft (211) is driven by a motor through an indirect transmission structure; a driving crank (212), a first end of which is connected to the driving shaft (211), so as to rotate around the driving shaft (211) within a predetermined angular range under the drive of the driving shaft (211); and a driving connecting rod (213), wherein a first end of the driving connecting rod (213) is connected to a second end of the driving crank (212), and a second end of the driving connecting rod (213) is connected to the linkage unit (22), The driving connecting rod (213) swings around the second end of the driving crank (212) while moving in translation with the second end of the driving crank (212).

3. The gas insulated switchgear according to claim 2, characterized in that The indirect transmission structure in the driving unit (21) includes a rack that reciprocates along a straight line and a gear that matches the rack; The rack serves as the first triggering moving part; The gear is fixedly arranged at one end of the driving shaft (211) to enable the driving shaft (211) to rotate; The gas insulated switchgear includes an auxiliary switch serving as the first position detection switch.

4. The gas-insulated switchgear according to any one of claims 1 to 3, characterized in that: The linkage unit (22) comprises: A linkage link (221) is connected to the driving unit (21) and is driven by the driving unit (21) to translate along the longitudinal direction of the linkage link (221); Three linkage cranks (222) and three linkage connecting rod shafts (223), wherein the first ends of the three linkage cranks (222) are respectively connected to the linkage connecting rod (221) via the corresponding linkage connecting rod shaft (223), and the three linkage connecting rod shafts (223) are arranged on the linkage connecting rod (221) along a first straight line at equal intervals at first intervals; Three linked crank shafts (224) are fixedly arranged corresponding to the three electrical switches (10), directly or indirectly actuating a movable contact arranged inside the corresponding electrical switch (10) so that the movable contact moves between a closing position and an opening position relative to a static contact arranged inside the corresponding electrical switch (10), and the three linked crank shafts (224) are arranged at equal intervals along a second straight line at a second interval. The first interval is equal to the second interval, and the first straight line is parallel to the second straight line.

5. The gas insulated switchgear according to claim 4, characterized in that The second triggering moving component is arranged on the linkage crank (222) so as to swing along with the linkage crank (222) around the linkage crank rotating shaft (224).

6. The gas-insulated switchgear according to claim 5, characterized in that The second triggering moving component is a cam (225), and the cam (225) has a first cam portion (225a) located on a first side of the linkage crank (222) and a second cam portion (225b) located on a second side of the linkage crank (222); The second position detection switch is a micro switch, and the micro switch includes a first micro switch (S1) provided corresponding to the first cam portion (225a) and a second micro switch (S2) provided corresponding to the second cam portion (225b).

7. The gas-insulated switchgear according to claim 5, characterized in that There are three second triggering moving parts, which are respectively arranged on the three linked cranks (222); There are three second position detection switches, which are respectively provided corresponding to the three second trigger moving parts.

8. The gas-insulated switchgear according to any one of claims 5 to 7, characterized in that: The gas-insulated switchgear further comprises a first mounting bracket (31) fixedly arranged on the rear side of the three electrical switches (10); The linkage unit (22) is arranged on the rear side of the first mounting bracket (31); The gas-insulated switchgear further comprises an opening and closing indicator (50), wherein the opening and closing indicator (50) comprises: a position pointer (51) disposed on one of the three linked cranks (222); A pointer window (52) is provided on the first mounting bracket (31) so that a user can observe the position of the position pointer (51) from the front side of the first mounting bracket (31).

9. The gas insulated switchgear according to claim 8, characterized in that The gas-insulated switchgear further comprises a second mounting bracket (32), which is arranged on the rear side of the first mounting bracket (31), is arranged opposite to the first mounting bracket (31) and is fixedly connected to the first mounting bracket (31), so that an accommodating space is formed between the second mounting bracket (32) and the first mounting bracket (31); The linkage unit (22) is accommodated in the accommodation space; The gas-insulated switchgear further comprises a drive unit box (42) fixedly connected to the rear side of the second mounting bracket (32); At least a portion of the drive unit (21) is disposed in the drive unit box (42), and another portion is located in the accommodating space.

10. The gas insulated switchgear according to claim 9, characterized in that The gas-insulated switchgear further comprises a third mounting bracket (33), which is arranged at the rear side of the first mounting bracket (31), is arranged opposite to and fixedly connected to the first mounting bracket (31), and is arranged side by side with the second mounting bracket (32) along the extension direction of the first mounting bracket (31), so that the second mounting bracket (32) and the third mounting bracket (33) together with the first mounting bracket (31) form the accommodation space; The gas-insulated switchgear further comprises a terminal box (43) fixedly connected to the rear side of the third mounting bracket (33), and the second position detection switch is connected to the terminal box (43) via a lead wire.

Images