CN210297052U - GIS switch cabinet - Google Patents

Abstract

The utility model provides a GIS cubical switchboard, the internal high voltage components and parts that are equipped with of cabinet, high voltage components and parts include: three station switch, voltage transformer earthing switch, single-phase voltage transformer, circuit breaker switch, three station on-off control mechanism and generating line, three station switch, voltage transformer earthing switch, circuit breaker setting are airtight in the gas tank that is full of the sulfur hexafluoride, voltage transformer earthing switch below is connected with single-phase voltage transformer, circuit breaker switch passes through the sealing washer and links to each other with the circuit breaker in the gas tank, three station on-off control mechanism links to each other with three station switch, the generating line passes gas tank top and links to each other with three station switch 1, high voltage components and parts install at the gas tank, the gas tank supports the base through the gas tank and supports. The GIS switch cabinet has the advantages that the distribution device is totally and hermetically insulated by sulfur hexafluoride gas, and the GIS switch cabinet has very high safety and reliability.

Description

GIS switch cabinet

Technical Field

The utility model relates to a high tension switchgear field, concretely relates to GIS cubical switchboard for distribution switchgear.

Background

The conventional air insulation power distribution device has the advantages that the bus is exposed and directly contacted with air, safety and reliability are low, and the requirements of human beings on stability and safety of industrial power utilization cannot be met along with high-speed development of science, technology and economy.

The circuit breaker mechanism body separation type design in the conventional air insulation conventional power distribution device is adopted, and when a switch module and an incoming and outgoing line sleeve are replaced, the main structure needs to be changed, so that the compatibility is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a GIS cubical switchboard uses the sulfur hexafluoride to carry out edge totally closed to high-voltage components and parts, utilizes the characteristic that sulfur hexafluoride gas itself has to ensure the safe in utilization of cubical switchboard, and the circuit breaker in the cubical switchboard has carried out brand-new integral type design on the basis of original split type design with the requirement of adaptation sulfur hexafluoride to the cubical switchboard leakproofness.

A GIS cubical switchboard: the cabinet body, the internal high-voltage components and parts that are equipped with of cabinet, one side of the cabinet body is equipped with instrument room, mechanism operation room and cable chamber from top to bottom in proper order, and the opposite side is equipped with the pressure release passageway, high-voltage components and parts are installed at the gas tank, the gas tank passes through the gas tank and supports the base support.

Preferably, the high voltage component includes: three station switch, voltage transformer earthing switch, single-phase voltage transformer, circuit breaker switch, three station on-off control mechanism and generating line, three station switch, voltage transformer earthing switch, circuit breaker setting are airtight in the gas tank that is full of the sulfur hexafluoride, voltage transformer earthing switch below is connected with single-phase voltage transformer, the circuit breaker switch is provided with the sealing washer with the circuit breaker junction in the gas tank, three station on-off control mechanism links to each other with three station switch, the generating line passes sleeve pipe (24) above gas tank and the gas tank and links to each other.

Preferably, the cabinet doors of the instrument room and the mechanism operation room are connected to the cabinet body through a rotary hinge, transparent windows for observing the instrument room and the mechanism operation room are arranged on the cabinet doors, a panel with a bus line diagram is printed on the inner wall of the mechanism operation room, a microcomputer program protection, an ammeter, a voltmeter and a low-voltage control element are arranged in the instrument room, and the instrument room displays the working state of a high-voltage component and the protection of a program; the mechanism operating room is internally provided with a circuit breaker switch and a three-position switch control mechanism, and the circuit breaker and the three-position switch in the air box are controlled through the circuit breaker switch and the three-position switch control mechanism in the mechanism operating room.

Preferably, be equipped with single-phase voltage transformer in the cable chamber, cable chamber door and the cabinet body adopt the structure of drawing from top to bottom, be equipped with interlocking mechanism between cable chamber door and the voltage transformer earthing switch, cable chamber door adopts the structure of hanging a door, and built-in chain, interlocking mechanism includes: the cable protection device comprises a state rotating plate, a cable I, a microswitch, a fixing frame, a limiting pin pressure spring, an operation baffle limiting pin, an operation baffle, a pulling pin, a door limiting pin, a cable II and an operation handle jack, wherein the state rotating plate, the cable I and the microswitch are arranged on the fixing frame, the cable I is arranged above one end of the state rotating plate, the microswitch is arranged above the other end of the state rotating plate, the cable I is connected with the operation baffle limiting pin of a three-position switch control mechanism, the limiting pin pressure spring is arranged on the operation baffle limiting pin, the pulling pin and the operation handle jack are arranged on the operation baffle, the cable II is arranged on the door limiting pin, the door limiting pin is inserted into a yielding hole in a cable chamber door, the cable II is connected with the three-position switch control mechanism, and when the three-position switch is grounded.

Preferably, the top end face of the cabinet body is provided with a pressure relief plate, the top of the pressure relief channel is communicated with the pressure relief plate, and the cabinet body is of an armored structure.

Preferably, when the load current between the three-position switch and the grounding switch of the voltage transformer is less than or equal to 1250A, the three-position switch and the grounding switch adopt a knife switch rotating structure; when the load current is larger than 1250A, the three-position switch and the grounding switch adopt a ball screw direct-acting structure, and the three-position switch is provided with a sleeve.

Preferably, the breaker switch and the breaker are designed in an integrated structure, the sealing ring for ensuring the air box tightness is installed on the air box, and the breaker switch enables the load current of the cabinet body to be compatible with different schemes from 12kv-1250A to 40.5kv-2500A through the integrated design of the breaker.

Preferably, a contact is arranged on the voltage transformer grounding switch, the voltage transformer grounding switch is connected to a primary loop or disconnected by rotating the contact, the rotation of the contact is driven by a rotating shaft connected with the contact, the rotation of the rotating shaft is driven by a driving connecting rod, and the driving connecting rod is connected with the mechanism operating room.

Preferably, the gas tank top is equipped with rings, rings link to each other through scalable davit and the fixed connecting rod in gas tank top, the davit is perpendicular to the connecting rod and extracts.

Preferably, the single-phase voltage transformer includes: a single-phase voltage transformer supporting beam, jack, base, jack fixing base, fixed axle and gyro wheel, the jack top is equipped with a single-phase voltage transformer supporting beam, and the below is equipped with the jack fixing base, the jack fixing base is fixed on the base, base both sides top is equipped with the backup pad perpendicularly, be equipped with the gyro wheel on the fixed axle of a single-phase voltage transformer supporting beam both sides, link to each other with the backup pad through the gyro wheel, the gyro wheel slides from top to bottom along the backup pad, be equipped with in the backup pad and be used for the gliding slide of gyro wheel, the.

The above technical scheme of the utility model has following profitable technological effect: the distribution device is totally closed by sulfur hexafluoride gas insulation, has very high safety and reliability, can ensure the continuous and stable operation of an electric power system and the personal safety of operators, has wide application range, can realize the compatibility of different schemes from 12kv-1250A to 40.5kv-2500A, is convenient to move and is not easy to damage.

Drawings

Fig. 1 is a front view of a GIS switchgear in an embodiment of the present invention;

fig. 2 is a side view of fig. 1 in an embodiment of the invention;

fig. 3 is a schematic diagram of the three-position switch and the grounding switch of the voltage transformer according to the embodiment of the present invention when the load current is 1250A or less;

fig. 4 is a schematic diagram of the three-position switch and the grounding switch of the voltage transformer according to the embodiment of the present invention when the load current is larger than 1250A;

fig. 5 is a schematic diagram of a cable chamber door and single-phase voltage transformer interlocking mechanism according to an embodiment of the present invention;

fig. 6 is a schematic view of a cable chamber door and a mount according to an embodiment of the present invention;

fig. 7 is a schematic view of a cable chamber door and door check pin according to an embodiment of the present invention;

fig. 8 is a top view of a cable chamber door of an embodiment of the present invention;

fig. 9 is a single-phase voltage transformer structure diagram of an embodiment of the present invention;

fig. 10 is a schematic diagram of the single-phase voltage transformer according to the embodiment of the present invention;

fig. 11 is a structural diagram of a grounding switch of a voltage transformer according to an embodiment of the present invention;

fig. 12 is a schematic view of a suspension ring according to an embodiment of the present invention;

fig. 13 is a schematic view of a pressure relief channel and a pressure relief plate according to an embodiment of the present invention.

Reference numerals:

1: a three-position switch; 2: a voltage transformer grounding switch; 201: a contact; 202: a rotating shaft; 203: a drive link; 204: sliding the block; 3: a single-phase voltage transformer; 301: a single-phase voltage transformer support beam; 302: a jack; 303: a base; 304: a jack fixing seat; 305: a fixed shaft; 306: a roller; 307: a support plate; 4: a circuit breaker; 5: a circuit breaker switch; 6: a three-position switch control mechanism; 7: a bus bar; 8: a gas tank; 9: a seal ring; 10: an air box support base; 11: an instrument room; 12: a mechanism operation chamber; 13: a cable chamber; 14: a pressure relief channel; 15: a pressure relief plate; 16: a hinge; 17: a cabinet door; 18: a transparent window; 19: a single-point lock; 20: a cable chamber door; 2001: a state transition plate; 2002: a stay cable I; 2003: a microswitch; 2004: a fixed mount; 2005: a limiting pin pressure spring; 2006: operating a baffle plate limiting pin; 2007: operating the baffle; 2008: pulling the pin; 2009: a door spacing pin; 2010: a stay cable II; 2011: an operating handle jack; 2012: a hole of abdication; 21: a hoisting ring; 22: hoisting a column; 23: a connecting rod; 24: a sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1 to 4, a GIS switch cabinet includes the cabinet body, the internal high voltage components and parts that are equipped with of cabinet, high voltage components and parts include: three station switch 1, voltage transformer earthing switch 2, single-phase voltage transformer 3, circuit breaker 4, circuit breaker switch 5, three station on-off control mechanism 6 and generating line 7, three station switch 1, voltage transformer earthing switch 2, circuit breaker 4 set up inclosed in being full of the gas tank 8 of sulfur hexafluoride, voltage transformer earthing switch 2 below is connected with single-phase voltage transformer 3, circuit breaker switch 5 is provided with sealing washer 9 with the circuit breaker 4 junction in the gas tank 8, three station on-off control mechanism 6 links to each other with three station switch 1, generating line 7 passes the sleeve pipe 24 of gas tank 8 with the gas tank top, high-voltage components and parts are installed at gas tank 8, gas tank 8 supports base 10 through the gas tank and supports.

Refer to and be equipped with instrument room 11, mechanism operation room 12 and cable chamber 13 from top to bottom in proper order to one side of the cabinet body of figure 13, the cabinet body is the panel beating cabinet body, and the cabinet body adopts the armor structure, cabinet body top end face is equipped with pressure relief board 14, pressure relief channel 14 top is linked together with pressure relief board 15, and pressure relief channel 14 uses the design of 2.0 thick clad aluminium zinc board panel beating, installs at the cabinet body at the back, adopts the mode of upwards relieving pressure, reduces the injury to the human body.

The cabinet door of the instrument room 11 is connected to the cabinet body through a rotating hinge 16, a transparent window 18 for observing the instrument room 11 is arranged on the cabinet door 17, a microcomputer program protection device, an ammeter, a voltmeter and a low-voltage control element are arranged in the transparent window, and the instrument room 11 displays the working state of a high-voltage component and the protection of a program.

Wherein, microcomputer program protection: the operation of the high-voltage component is controlled by a programmable PLC, and the microcomputer program protection comprises the following steps: programmable PLC control program and system protection for the programmable PLC control program.

The ammeter and the voltmeter are connected with the high-voltage component.

Wherein the low voltage control element is a control device that switches a circuit on and off.

A cabinet door 17 of the mechanism operating chamber 12 is connected to the cabinet body through a rotating hinge 16, a transparent window 18 used for observing the mechanism operating chamber is arranged on the cabinet door 17, a panel with a primary circuit bus 7 circuit diagram is printed in the mechanism operating chamber 12, a circuit breaker switch 5 and a three-position switch control mechanism 6 are arranged in the panel, and the circuit breaker switch 5 and the three-position switch control mechanism 6 control a circuit breaker 4 and a three-position switch 1 in an air box 8.

As shown in fig. 3 and 4, the three-position switch control mechanism 6: when the load current between the three-position switch 1 and the voltage transformer grounding switch 2 is less than or equal to 1250A, the three-position switch 1 and the voltage transformer grounding switch 2 adopt a knife switch rotating structure; when the load current is larger than 1250A, the three-position switch 1 and the voltage transformer grounding switch 2 adopt a ball screw direct-acting type structure, and the three-position switch 1 is provided with a sleeve 24.

Wherein, breaker switch 5 and circuit breaker 4 integrated structure design, the sealing washer 9 that is equipped with on breaker switch 5 and the circuit breaker 4 can guarantee the seal of gas tank 8. The breaker switch 5 and the breaker 4 are integrally designed, so that the GIS switch cabinet can replace a switch module and an inlet and outlet bushing 24 under the condition that the main structure of the GIS switch cabinet is not changed, and the compatibility of different schemes from 12kv-1250A to 40.5kv-2500A is realized.

The cabinet door 17 of instrument room 11 sets up above mechanism operation room 12 cabinet door 17, and instrument room 11 is the same size different with the cabinet door 17 structure of mechanism operation room 12, and the difference lies in being equipped with single-point lock 19 on the mechanism operation room 12, and single-point lock 19 is used for locking cabinet door 17 on the cabinet body, and the whole protection level IP4X of cabinet door 17 can see the barometer pressure size and the on-off state of instrument room 11, the primary system diagram of mechanism operation room 12 through observing transparent window 18. The mechanism operation chamber 12 is opened, and power feeding operation, power cutoff operation, and grounding operation are performed in accordance with the operation sequence.

Referring to fig. 5 to 8, a single-phase voltage transformer 3 is arranged in the cable chamber 13, the cable chamber door 20 and the cabinet body adopt a structure of lifting up and down, and an interlocking mechanism is arranged between the cable chamber door 20 and the voltage transformer grounding switch 2. The cable chamber door 20 is of a hanging door structure and is internally provided with a chain.

Wherein, interlocking mechanism includes: the state rotating plate 2001, the stay cable I2002, the microswitch 2003, the fixing frame 2004, the limit pin pressing spring 2005, the operation baffle plate limit pin 2006, the operation baffle plate 2007, the pull pin 2008, the door limit pin 2009, the stay cable II 2010 and the operation handle insertion hole 2011.

The fixing frame 2004 is used for fixing the state rotating plate 2001, and the fixing frame 2004 is fixed in the cabinet body.

Cable chamber door 20 interlocks with voltage transformer grounding switch 2:

as shown in fig. 6, the state transition plate 2001 in fig. 6 shows two operation states of pressing and releasing the pressing.

1. When the cable chamber door 20 is correctly installed, the state rotating plate 2001 is pressed down, the pull cable i 2002 connected with the state rotating plate 2001 moves downwards, the pull cable i 2002 pulls the operation baffle limiting pin 2006 at the end of the three-position switch control mechanism 6 to the unlocking position, the toggle pull pin 2008 on the operation baffle 2007 is opened at the moment, the operation handle is inserted into the operation handle insertion hole 2011, the operation handle is rotated to perform closing operation, the micro switch 2003 in the control loop of the three-position switch control mechanism 6 is pressed down by the state rotating plate 2001 to be switched on, namely, the electric operation loop of the three-position switch 1 is also switched on, and then electric operation can be performed.

2. When the three-position switch 1 is in a grounding and closing state, the three-position switch control mechanism 6 controls a line to pull the cable II 2010, the position of the door limiting pin 2009 is staggered with the position of the abdicating hole 2012 of the cable chamber door 20, the door limiting pin 2009 is pulled by the cable II 2010 to enable the door limiting pin 2009 to move horizontally, the upper position and the lower position of the door limiting pin 2009 are consistent with the position of the abdicating hole 2012, and the cable chamber door 20 is lifted up and opened to be taken down.

3. When the cable chamber door 20 is removed, the state transition plate 2001 is released from the pressed state, the pull wire i 2002 connected to the state transition plate 2001 is reset by the stopper pin compression spring 2005 of the operation stopper pin 2006, the operation stopper pin 2006 is reset to the lower side of the operation stopper 2007, the pull pin 2008 is closed, the operation handle insertion hole 2011 cannot be inserted with the operation handle, the micro switch 2003 in the control circuit of the three-position switch control mechanism 6 and the state transition plate 2001 are switched from closed to open, the circuit of the three-position switch control mechanism 6 is cut off, and the electric operation cannot be performed.

Referring to fig. 9 to 10, the single-phase voltage transformer 3 includes: single-phase voltage transformer supporting beam 301, jack 302, base 303, jack fixing base 304, fixed axle 305 and gyro wheel 306, jack 302 top is equipped with single-phase voltage transformer supporting beam 301, and the below is equipped with jack fixing base 304, jack fixing base 304 is fixed on base 303, base 303 both sides top is equipped with backup pad 307 perpendicularly, be equipped with gyro wheel 306 on the fixed axle 305 of single-phase voltage transformer supporting beam 301 both sides, link to each other with backup pad 307 through gyro wheel 306, gyro wheel 306 slides from top to bottom along backup pad 307, be equipped with the gliding slide that is used for gyro wheel 306 on the backup pad 307, base 303 is fixed in cabinet body bottom.

The one-way installation of single-phase voltage transformer 3, to one-way voltage transformer 3 heavier weight reach single 50kg, the installation and maintain the difficulty, design one-way voltage transformer 3 sliding construction, put jack 302 in jack fixing base 304, press jack 302 simultaneously, one-way voltage transformer 3 is the ascending of continuous rising of this in-process, rises to the slide top when stainless steel fixed axle 305, uses bolt fastening one-way voltage transformer 3, one-way voltage transformer 3 finishes the installation.

Referring to fig. 11, a contact 201 is arranged on the voltage transformer grounding switch 2, the voltage transformer grounding switch 2 is connected to a primary circuit or disconnected by rotating the contact 201, the rotation of the contact 201 is driven by a rotating shaft 202 connected to the contact 201, the rotation of the rotating shaft 202 is driven by a driving connecting rod 203, the driving connecting rod 203 is connected to a sliding block 204, and the sliding block 204 is connected to a mechanism operating room 12 for controlling the operation of the voltage transformer grounding switch 2.

Referring to fig. 12, a hanging ring 21 is arranged above the gas tank 8, the hanging ring 21 is connected with a connecting rod 23 fixed to the top of the gas tank 8 through a telescopic hanging post 22, the hanging post 22 is pulled out during hoisting, the hanging ring 21 connected with the hanging post 22 is used for hoisting, and after the hoisting is finished, the hanging post 22 is placed back.

The size of the cabinet body is 2250 × 1225 × 600mm, and the cabinet body is formed by processing a 2.0-thick aluminum-zinc-coated sheet metal. The gas tank 8 is formed by bending, welding and processing a 3.0-thick 304 stainless steel plate sheet metal.

To sum up, the GIS switch cabinet is internally provided with high-voltage components, the three-position switch, the voltage transformer grounding switch and the circuit breaker are arranged in an air box which is sealed and filled with sulfur hexafluoride, the single-phase voltage transformer is connected below the voltage transformer grounding switch, the circuit breaker is connected with the circuit breaker in the air box through a sealing ring, the three-position switch control mechanism is connected with the three-position switch, a bus penetrates through the upper part of the air box and is connected with the three-position switch 1, the high-voltage components are arranged in the air box, and the air box is supported by the air box supporting base. The utility model discloses a GIS cubical switchboard, distribution device are whole by sulfur hexafluoride gas insulation totally closed, have very high security and reliability, can realize from 12kv-1250A to the compatibility of 40.5kv-2500A different schemes, and it is convenient to remove.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A GIS switchgear, comprising: the cabinet body, the internal high-voltage components and parts that are equipped with of cabinet, one side of the cabinet body is equipped with instrument room (11), mechanism operation room (12) and cable chamber (13) from top to bottom in proper order, and the opposite side is equipped with pressure release passageway (14), high-voltage components and parts are installed in gas tank (8), gas tank (8) are supported through gas tank support base (10).

2. The GIS switch cabinet according to claim 1, wherein the high voltage components comprise: three-station switch (1), voltage transformer earthing switch (2), single-phase voltage transformer (3), circuit breaker (4), circuit breaker switch (5), three-station on-off control mechanism (6) and bus (7), three-station switch (1), voltage transformer earthing switch (2), circuit breaker (4) set up in being full of the gas tank of sulfur hexafluoride, voltage transformer earthing switch (2) below is connected with single-phase voltage transformer (3), circuit breaker switch (5) and circuit breaker (4) junction in gas tank (8) are provided with sealing washer (9), three-station on-off control mechanism (6) link to each other with three-station switch (1), bus (7) pass gas tank (8) and link to each other with sleeve pipe (24) of gas tank top.

3. The GIS switchgear cabinet according to claim 1, wherein the cabinet doors (17) of the instrument room (11) and the mechanism operation room (12) are connected to the cabinet body through a rotating hinge (16), a transparent window (18) for observing the instrument room (11) and the mechanism operation room (12) is arranged on the cabinet doors (17), a panel with a bus (7) circuit diagram is printed on the inner wall of the mechanism operation room (12), a microcomputer program protection, an ammeter, a voltmeter and a low-voltage control element are arranged in the instrument room (11), and the instrument room (11) displays the working state and the program protection of high-voltage components; be equipped with circuit breaker switch (5) and three station switch control mechanism (6) in mechanism control room (12), control circuit breaker (4) and three station switch (1) in gas tank (8) through circuit breaker switch (5) and three station switch control mechanism (6) in mechanism control room (12).

4. The GIS switch cabinet according to claim 1, wherein a single-phase voltage transformer (3) is arranged in the cable chamber (13), a cable chamber door (20) and the cabinet body are in a structure of being pulled up and down, an interlocking mechanism is arranged between the cable chamber door (20) and the voltage transformer grounding switch (2), the cable chamber door (20) is in a hanging door structure, a built-in chain is arranged, and the interlocking mechanism comprises: the state rotating plate (2001), the stay cable I (2002), the microswitch (2003), the fixing frame (2004), a limit pin compression spring (2005), an operation baffle limit pin (2006), an operation baffle (2007), a pull pin (2008), a door limit pin (2009), a stay cable II (2010) and an operation handle jack (2011) are arranged on the fixing frame (2004), the state rotating plate (2001), the stay cable I (2002) and the microswitch (2003) are arranged on the fixing frame (2004), the stay cable I (2002) is arranged above one end of the state rotating plate (2001), the microswitch (2003) is arranged above the other end of the state rotating plate, the stay cable I (2002) is connected with the operation baffle limit pin (2006) of the three-position switch control mechanism (6), the limit pin compression spring (2005) is arranged on the operation baffle limit pin (2006), the pull pin (2008) and the operation handle jack (2011) are arranged on the operation baffle (2007), the stay cable II (2010) is arranged on, the door limiting pin (2009) is inserted into a yielding hole (2012) in the cable chamber door (20), the cable II (2010) is connected with the three-position switch control mechanism (6), and when the three-position switch (1) is grounded and switched on, the three-position switch control mechanism (6) pulls the cable II (2010).

5. The GIS switch cabinet according to claim 1, wherein a pressure relief plate (15) is arranged on the top end face of the cabinet body, the top of the pressure relief channel (14) is communicated with the pressure relief plate (15), and the cabinet body is of an armored structure.

6. The GIS switchgear cabinet according to claim 2, wherein when the load current between the three-position switch (1) and the grounding switch (2) of the voltage transformer is less than or equal to 1250A, the three-position switch (1) and the grounding switch (2) adopt a knife-switch rotating structure; when the load current is larger than 1250A, the three-position switch (1) and the grounding switch (2) adopt a ball screw direct-acting structure, and a sleeve (24) is arranged on the three-position switch (1).

7. The GIS switchgear cabinet according to claim 2, wherein the breaker switch (5) and the breaker (4) are designed as an integrated structure, and the sealing ring (9) is installed on the gas box (8) for ensuring the tightness of the gas box (8).

8. The GIS switchgear cabinet according to claim 2, wherein the voltage transformer grounding switch (2) is provided with a contact (201), the voltage transformer grounding switch (2) is switched on or off by rotating the contact (201), the rotation of the contact (201) is driven by a rotating shaft (202) connected with the contact (201), the rotation of the rotating shaft (202) is driven by a driving connecting rod (203), and the driving connecting rod (203) is connected with the mechanism operating room (12).

9. The GIS switchgear cabinet as claimed in claim 1, wherein a hanging ring (21) is provided above the gas box (8), the hanging ring (21) is connected with a connecting rod (23) fixed on the top of the gas box (8) through a retractable hanging post (22), and the hanging post (22) is pulled out perpendicular to the connecting rod (23).

10. The GIS switchgear according to claim 2, characterized in that said single-phase voltage transformer (3) comprises: single-phase voltage transformer supporting beam (301), jack (302), base (303), jack fixing base (304), fixed axle (305) and gyro wheel (306), jack (302) top is equipped with single-phase voltage transformer supporting beam (301), and the below is equipped with jack fixing base (304), jack fixing base (304) are fixed on base (303), base (303) both sides top is equipped with backup pad (307) perpendicularly, be equipped with gyro wheel (306) on fixed axle (305) of single-phase voltage transformer supporting beam (301) both sides, link to each other with backup pad (307) through gyro wheel (306), and gyro wheel (306) slide from top to bottom along backup pad (307), be equipped with on backup pad (307) and be used for the gliding slide of gyro wheel (306), base (303) are fixed in cabinet body bottom.

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