CN111130004A - Gas insulation switch cabinet - Google Patents
Gas insulation switch cabinet Download PDFInfo
- Publication number
- CN111130004A CN111130004A CN202010101474.0A CN202010101474A CN111130004A CN 111130004 A CN111130004 A CN 111130004A CN 202010101474 A CN202010101474 A CN 202010101474A CN 111130004 A CN111130004 A CN 111130004A
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- Prior art keywords
- bus
- grounding
- switch
- static contact
- contact
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
A gas insulation switch cabinet comprises an inner space, wherein a bus chamber is arranged in the bus chamber, a bus and a three-station isolating switch are arranged in the bus chamber, a bus grounding switch is arranged between the bus and the three-station isolating switch, the bus grounding switch comprises a first operating mechanism, a first moving contact, a first isolating static contact and a first grounding static contact, the three-station isolating switch comprises a switch-on static contact, the first isolating static contact and the switch-on static contact are combined together to form a combined static contact, and the first moving contact makes linear reciprocating motion between the combined static contact and the first grounding static contact under the action of the first operating mechanism; when the three-station isolating switch is in an isolating or grounding state, the first moving contact is driven to be matched with the first grounding fixed contact by manually operating the first operating mechanism so as to realize bus grounding. According to the gas insulation switch cabinet, the bus grounding switch is additionally arranged in the switch cabinet, so that the double protection functions of line side grounding and bus side grounding are realized.
Description
Technical Field
The invention relates to the technical field of switchgear, in particular to a gas insulation switch cabinet.
Background
The gas insulated cabinet is usually configured as a line side three-position isolating switch for realizing a line side grounding switch, a special grounding switch is configured at a bus side, when a bus needs to be grounded and overhauled, the bus can be grounded only through the grounding switch configured at the upper stage (such as the outgoing line side of a high-voltage transformer) of the system or the three-position isolating switch and the breaker secondary closing on a sectional connection cabinet configured by the system, the realization mode of grounding the sectional bus by the sectional connection cabinet is combined with figure 10, the grounding of the bus needs to pass through the breaker opening, then all the three-position isolating switches on the bus are opened, then the three-position isolating switches are grounded, finally the breaker is closed, the bus is in a grounding state, therefore, the grounding program of the bus or the sectional bus depends on the system configuration, for example, the system is not configured with the upper stage/upper stage not configured with the grounding switch or the sectional connection cabinet is not configured in the switch cabinet system, direct grounding of the bus cannot be realized, great potential safety hazards are brought to field maintenance, and the current operation and safety regulations are not met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a switch cabinet which is high in reliability and has a bus direct grounding function.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas insulation switch cabinet comprises an inner space, wherein a bus chamber is arranged in the bus chamber, a bus and a three-station isolating switch are arranged in the bus chamber, a bus grounding switch is arranged between the bus and the three-station isolating switch, the bus grounding switch comprises a first operating mechanism, a first moving contact, a first isolating static contact and a first grounding static contact, the three-station isolating switch comprises a switch-on static contact, the first isolating static contact and the switch-on static contact are combined together to form a combined static contact, and the first moving contact makes linear reciprocating motion between the combined static contact and the first grounding static contact under the action of the first operating mechanism; when the three-station isolating switch is in an isolating or grounding state, the first moving contact is driven by the first operating mechanism to be matched with the first grounding fixed contact so as to realize bus grounding.
Further, the bus grounding switch is a direct-acting two-station bus grounding switch, the three-station isolating switch is a disconnecting link type three-station isolating switch, the bus is arranged at the upper part of the bus chamber, the three-station isolating switch is arranged at the lower part of the bus chamber, the bus grounding switch is arranged at the middle part of the bus chamber, the combined static contact is positioned between the bus grounding switch and the three-station isolating switch, and the switch-on static contact in the combined static contact is positioned at one side close to the three-station isolating switch.
Furthermore, the combined static contact comprises a cylindrical conductive block and a rectangular conductive block, the cylindrical conductive block is used as a first isolation static contact, the rectangular conductive block is used as a switch-on static contact, a cavity for the first moving contact to extend into in a matching mode is arranged at one end of the cylindrical conductive block as a matching end, the other end of the cylindrical conductive block is used as a connecting end and is fixed to the bus chamber, and the rectangular conductive block is fixed to one side of the cylindrical conductive block.
The bus chamber further comprises a supporting insulator and a first transmission sealing device, a first through hole is formed in one side of the bus chamber, the first through hole is sealed through the first transmission sealing device, the supporting insulator is arranged on the side, opposite to the first through hole, of the bus chamber, the combined static contact is arranged on the supporting insulator, a transmission lead screw penetrates through the first transmission sealing device in a sliding mode, one end of the transmission lead screw is connected with an output shaft of the first operating mechanism, the other end of the transmission lead screw penetrates through the first grounding static contact and is connected with the first moving contact, and the first moving contact moves linearly between the first grounding static contact and the combined static contact under the driving of the transmission lead screw.
Furthermore, two ends of the first moving contact are respectively provided with an annular groove, each annular groove is internally provided with a conductive contact finger, and the two conductive contact fingers are installed in a positive and negative mode.
Further, the three-station isolating switch comprises a second operating mechanism, an insulating pull rod, a second movable contact assembly, a second grounding static contact seat and a grounding insulator, wherein the grounding insulator and the second grounding static contact seat are arranged on one side, far away from the bus, of the bus chamber, the second movable contact assembly is rotatably mounted on the grounding insulator, and under the driving of the second operating mechanism, the second movable contact assembly rotates under the action of the insulating pull rod and is matched with the second grounding static contact seat or a connected static contact.
Furthermore, a second through hole is formed in one side of the bus chamber, a second transmission sealing device used for sealing the second through hole is arranged on the second through hole, an output shaft of a second operating mechanism penetrates through the second transmission sealing device in a sliding mode, one end of an insulating pull rod is connected with the output shaft of the second operating mechanism, the other end of the insulating pull rod is connected with a second moving contact assembly, and under the driving of the second operating mechanism, the insulating pull rod drives the second moving contact assembly to rotate to be matched with a second grounding static contact seat or a switch-on static contact.
Furthermore, the second moving contact assembly comprises at least one pair of conducting strips and connecting pieces which are arranged oppositely, one ends of the conducting strips are rotatably installed on the central conductor of the grounding insulator, the other ends of the conducting strips are connected together through a connecting beam, the connecting pieces are cylindrical, a connecting arm is arranged in the middle of the connecting pieces and is used for being fixedly connected with the connecting beam, and two ends of the connecting pieces are used for being rotatably connected with the insulating pull rod.
Furthermore, the connecting beam is positioned in the middle of the conducting strips, the oppositely arranged conducting strips are in an H shape, and a gap between the oppositely arranged conducting strips is used for being matched with the switch-on static contact and the second grounding static contact seat.
Furthermore, the combined static contact is connected with a bus in the bus chamber through a connecting bus.
Furthermore, a first operating mechanism of the bus grounding switch is provided with a detachable handle, and a closable movable door is arranged at a handle socket.
The internal space of the bus grounding switch further comprises a control chamber, a first operating mechanism of the bus grounding switch is arranged in the control chamber, a second operating mechanism of the three-station isolating switch is arranged in the control chamber, a first through hole and a second through hole are formed in the side wall between the control chamber and the bus chamber, a first transmission sealing device is arranged in the first through hole, and an output shaft of the first operating mechanism penetrates through the first transmission sealing device to operate a first moving contact in the bus chamber; and a second transmission sealing device is arranged in the second through hole, and an output shaft of the second operating mechanism passes through the second transmission sealing device to operate the three-station isolating switch in the bus chamber.
Compared with the existing switch cabinet which can only realize bus side grounding or line side grounding, the gas insulated switch cabinet provided by the invention has the advantages that the bus grounding switch is additionally arranged in the switch cabinet to realize the dual protection functions of line side grounding and bus side grounding, the bus grounding cabinet and the three-station isolation switch cabinet are combined together, particularly, the switch-on static contact of the three-station isolation switch and the isolation switch of the bus grounding switch are combined together, the system resource configuration is optimized, and the space utilization rate of equipment is improved.
In addition, the combined static contact is formed by combining a switching-on static contact of the three-station isolating switch and a first isolating static contact of the bus grounding switch, so that the structure is simplified, and the installation is convenient and reliable; the second moving contact component of the three-station isolating switch is formed by combining conducting strips which are arranged in pairs, and the current-carrying capacity requirements of different current levels can be met by increasing or decreasing the number of the conducting strips; the first operating mechanism is provided with a mechanical lock and an electrical lock, so that the connection condition and the working procedure of the field electrical equipment are ensured to be applicable to safety, and misoperation is prevented.
Drawings
Fig. 1 is a schematic structural diagram of a gas insulated switchgear of the present invention;
FIG. 2 is a schematic structural diagram of a bus grounding switch in a gas insulated switchgear according to the present invention;
FIG. 3 is a schematic diagram of a bus grounding switch in an isolated state in a gas insulated switchgear according to the present invention;
FIG. 4 is a schematic diagram of a grounding switch of a bus in a gas insulated switchgear of the present invention in a grounding state;
fig. 5 is a schematic structural diagram of a combined stationary contact in a gas insulated switchgear of the present invention;
FIG. 6 is a schematic structural diagram of a second movable contact assembly in a gas insulated switchgear of the present invention;
fig. 7 is a schematic diagram of a gas insulated switchgear of the present invention;
FIG. 8 is a schematic diagram of FIG. 3;
FIG. 9 is a schematic diagram of FIG. 4;
FIG. 10 is a schematic diagram of the background art;
in the figure: 5-a circuit breaker.
Detailed Description
The following further describes a specific embodiment of the gas insulated switchgear according to the present invention with reference to the embodiments shown in fig. 1 to 9. A gas-insulated switchgear of the present invention is not limited to the description of the following embodiments.
A gas insulation switch cabinet comprises an inner space of the gas insulation switch cabinet, wherein a bus chamber a is provided with a bus 3 and a three-station isolating switch 2, a bus grounding switch 1 is arranged between the bus 3 and the three-station isolating switch 2, the bus grounding switch 1 comprises a first operating mechanism 11, a first moving contact 12, a first isolating static contact 13 and a first grounding static contact 14, the three-station isolating switch 2 comprises a switch-on static contact 22, the first isolating static contact 13 and the switch-on static contact 22 are combined together to form a combined static contact, and the first moving contact 12 makes a linear reciprocating motion between the combined static contact and the first grounding static contact 14 under the action of the first operating mechanism 11; when the three-position isolating switch 2 is in an isolating or grounding state, the first moving contact 12 is driven to be matched with the first grounding fixed contact 14 by manually operating the first operating mechanism 11, so that the bus 3 is grounded.
Compared with the existing switch cabinet which can only realize bus side grounding or line side grounding, the gas insulated switch cabinet disclosed by the invention has the advantages that the bus grounding switch 1 is additionally arranged in the switch cabinet to realize the dual protection functions of line side grounding and bus side grounding, the bus grounding cabinet and the three-station isolating switch cabinet are combined together, particularly, the switch-on static contact 22 of the three-station isolating switch 2 and the isolating switch of the bus grounding switch 1 are combined together, the system resource allocation is optimized, and the space utilization rate of equipment is improved.
As shown in fig. 1, an internal space of a gas insulated switchgear is divided into a bus chamber a, a breaker chamber, a cable chamber, a control chamber b and a pressure relief channel, a bus 3 and a three-station disconnecting switch 2 are installed in the bus chamber a, a bus grounding switch 1 is arranged between the bus 3 and the three-station disconnecting switch 2, the bus grounding switch 1 includes a first operating mechanism 11, a first moving contact 12, a first isolating static contact 13 and a first grounding static contact 14, preferably, as shown in fig. 1-5, a switch-on static contact 22 of the three-station disconnecting switch 2 and the first isolating static contact 13 are combined together to form a combined static contact, and the first moving contact 12 makes a linear reciprocating motion between the combined static contact and the first grounding static contact 14 under the action of the first operating mechanism 11; when the three-position disconnecting switch 2 is in an isolating or grounding state, the first moving contact 12 is driven to be matched with the first grounding fixed contact 14 through the manual operation of the first operating mechanism 11 to realize the grounding of the bus 3, the bus grounding switch 1 only allows the manual operation and does not allow the electric operation, preferably, the first operating mechanism 11 and the second operating mechanism 21 of the three-position disconnecting switch 2 are arranged in the control chamber b, and the mechanical and electric locking is added on the first operating mechanism 11 of the bus grounding switch 1, so that the connection condition and the working procedure of the field electrical equipment are ensured to be applicable to safety, and the misoperation is prevented.
Specifically, as shown in fig. 1, the bus chamber a is disposed at an upper portion in the cabinet body, the bus grounding switch 1 is a direct-acting two-station bus grounding switch 1, the three-station disconnecting switch 2 is a knife-switch type three-station disconnecting switch 2, the bus 3 is disposed at the upper portion of the bus chamber a, the three-station disconnecting switch 2 is disposed at a lower portion of the bus chamber a, the bus grounding switch 1 is disposed at a middle portion of the bus chamber a, and the switch-on stationary contact 22 in the combined stationary contact is located at a side close to the three-station disconnecting switch 2, so that matching between the second movable contact assembly 26 of the three-station disconnecting switch 2 and the combined stationary contact is facilitated.
The preferred embodiment of the combined static contact is specifically shown in fig. 2-5, and includes a cylindrical conductive block and a rectangular conductive block, the cylindrical conductive block is used as the first isolated static contact 13, the rectangular conductive block is used as the switch-on static contact 22, a cavity into which the first movable contact 12 is fitted is disposed at one end of the cylindrical conductive block as a mating end, the other end is used as a connecting end and is fixed to the bus chamber a, and the rectangular conductive block is fixed to one side of the cylindrical conductive block. As shown in fig. 3, the first movable contact 12 can completely extend into the cavity when being matched with the first isolated fixed contact 13; as shown in fig. 4, when the first movable contact 12 is mated with the first grounded stationary contact 14, the first movable contact 12 completely extends out of the cavity. Preferably, the combined static contact is integrally formed.
The bus chamber a further comprises a supporting insulator 15 and a first transmission sealing device 16, preferably, the supporting insulator 15 and the first transmission sealing device 16 are oppositely arranged on two side walls of the bus chamber a, a first through hole is arranged on one side of the bus chamber a, the first through hole is sealed by the first transmission sealing device 16, the supporting insulator 15 is arranged on one side of the bus chamber a opposite to the first through hole, the combined static contact is arranged on the supporting insulator 15, a transmission lead screw 17 penetrates through the first transmission sealing device 16 in a sliding manner, one end of the transmission lead screw 17 is connected with an output shaft of the first operating mechanism 11, the other end of the transmission lead screw 17 penetrates through the first grounding static contact 14 to be connected with the first moving contact 12, and the first moving contact 12 is driven by the transmission lead screw 17 to move linearly between the first grounding static contact 14 and the combined static contact. Preferably, the transmission screw 17 is preferably made of reinforced nylon material, and the screw pitch of the M18 screw is 4mm, although the transmission screw 17 may also be other screws meeting the transmission and insulation requirements. The two ends of the first moving contact 12 are respectively provided with an annular groove, each annular groove is internally provided with a conductive contact finger, the two conductive contact fingers are installed in a positive and negative mode, and the conductive contact fingers are spring contact fingers and are preferably formed by processing chromium, zirconium and copper with good conductivity and high hardness.
The three-position isolating switch 2 comprises a second operating mechanism 21, an insulating pull rod 23, a second moving contact assembly 26, a second grounding static contact seat 24 and a grounding insulator 27, wherein the grounding insulator 27 and the second grounding static contact seat 24 are arranged on one side, far away from the bus 3, in the bus chamber a, the grounding insulator 27 is rotatably provided with the second moving contact assembly 26, and under the driving of the second operating mechanism 21, the second moving contact assembly 26 rotates under the action of the insulating pull rod 23 and is matched with the second grounding static contact seat 24 or the connection static contact 22. Specifically, a second through hole is formed in one side of the bus chamber a, a second transmission sealing device 25 for sealing the second through hole is arranged on the second through hole, an output shaft of the second operating mechanism 21 is slidably arranged through the second transmission sealing device 25, one end of the insulating pull rod 23 is connected with the output shaft of the second operating mechanism 21, the other end of the insulating pull rod 23 is connected with a second movable contact assembly 26, and the insulating pull rod 23 drives the second movable contact assembly 26 to rotate to be matched with the second grounding stationary contact 24 or the switch-on stationary contact 22 under the driving of the second operating mechanism 21.
The invention also has an improvement point that the cabinet body can be ensured to be uncharged during maintenance, and the principle is as follows: the switch-on static contact 22 of the three-station isolating switch 2 is directly and electrically connected with the bus, the second movable contact component 26 of the three-station isolating switch 2 is not directly and electrically connected with the bus, and the second movable contact component 26 is electrically connected with the bus when being matched with the switch-on static contact 22, so that the insulating pull rod 23 and the second operating mechanism 21 which are connected with the second movable contact component 26 cannot be electrically connected with the bus when the second movable contact component 26 is disconnected with the switch-on static contact 22, and the whole cabinet body can be uncharged by manually operating the first mechanism 21 to disconnect the electrical connection with the bus.
Specifically, the second movable contact assembly 26 is shown in fig. 6, the second movable contact assembly 26 includes at least one pair of conductive sheets 26a and a connecting member 26b, the number of the conductive sheets 26a can be increased or decreased according to the actual current magnitude to meet the current-carrying capacity requirements of different current levels, two pairs of conductive sheets 26a are shown in fig. 6, preferably, the current-carrying capacity of one pair of the conductive sheets 26a can meet the current requirement of 630A, the current-carrying capacity of two pairs of the conductive sheets 26a can meet the current requirement of 1250A, the current-carrying capacity of four pairs of the conductive sheets 26a can meet the current requirement of 2500A, and so on. One end of the conducting strip 26a is rotatably mounted on the central conductor of the grounding insulator 27, the other end of the conducting strip 26a is connected together through a connecting beam 26c, the connecting piece 26b is cylindrical, a connecting arm 26d is arranged in the middle of the connecting piece and is used for being fixedly connected with the connecting beam 26c, the two ends of the connecting piece 26b are used for being rotatably connected with the insulating pull rod 23, and the connecting arm 26d drives the connecting beam 26c to enable the conducting strip 26a to rotate under the driving of the insulating pull rod 23. The connecting beam 26c is located in the middle of the conducting strips 26a, and makes the pair of oppositely arranged conducting strips 26a present an "H" shape, and the gap between the two oppositely arranged conducting strips 26a is used for matching with the switch-on stationary contact 22 and the second grounding stationary contact 24.
As an embodiment, as shown in fig. 1, a bus 3 is disposed on an upper portion of a bus chamber a, a grounding insulator 27 and a second grounding stationary contact 24 are disposed on a lower portion of the bus chamber a, a first through hole and a second through hole are disposed on one side of the bus chamber a, preferably, the second through hole is disposed below the first through hole, a first transmission sealing device 16 and a second transmission sealing device 25 are disposed in the first through hole and the second through hole respectively for sealing, a support insulator 15 is disposed on a side opposite to the first transmission sealing device 16, a combined stationary contact is disposed on the support insulator 15, preferably, the combined stationary contact is connected with the bus 3 on the upper portion of the bus chamber a through a connecting busbar 4, a connecting stationary contact 22 on the combined stationary contact is disposed on a lower side of the combined stationary contact, and a first isolation stationary contact 13 of the combined stationary contact is connected with the first moving contact 12, the transmission screw 17, the first grounding stationary contact, The first transmission sealing device 16 is positioned on the same axis, and the transmission screw 17 drives the first moving contact 12 to move linearly between the first grounding fixed contact 14 and the first isolation fixed contact 13 of the combined fixed contact; a second movable contact assembly 26 of the three-station disconnecting switch 2 is mounted on the grounding insulator 27, an output shaft of the second operating mechanism 21 passes through the second transmission sealing device 25 and is connected with the insulating pull rod 23 through a bevel gear transmission structure, the bevel gear transmission structure comprises a first bevel gear and a second bevel gear which are in meshing transmission with each other, the output shaft of the second operating mechanism 21 passes through the second transmission sealing device 25 and then is connected with the first bevel gear, the insulating pull rod 23 is connected with the second bevel gear, under the action of the second operating mechanism 21, the insulating pull rod 23 drives the second movable contact assembly 26 to rotate, and the second movable contact assembly 26 is respectively matched with the second grounding static contact seat 24 and the connection static contact 22 in the combined static contact in the rotating process. As shown in fig. 1, the switch-on static contact 22 is obviously located above the second movable contact assembly 26, and when the insulating pull rod 23 is broken or otherwise fails, the second movable contact assembly 26 does not contact and conduct electricity with the switch-on static contact 22 under the action of gravity, which causes a safety hazard. The control chamber b is located at one side close to the bus chamber a, preferably, a first perforation and a second perforation are arranged on the side wall between the bus chamber a and the control chamber b, the second operating mechanism 21 and the first operating mechanism 11 are both arranged in the control chamber b, the first operating mechanism 11 is preferably provided with a detachable handle (not shown in the figure), a closable movable door (not shown in the figure) is arranged at a socket of the handle, when the bus 3 is required to be grounded, the three-station isolating switch 2 is in an isolating or grounding state, the movable door is opened, the handle is inserted and rotated to enable the transmission screw 17 to drive the first movable contact 12 to move, the handle stops rotating and is pulled out after the first movable contact 12 is matched with the first grounding static contact 14, and the movable door is closed; when the grounding of the bus 3 needs to be removed, the movable door is opened, the handle is inserted and rotated to enable the transmission screw 17 to drive the first movable contact 12 to be separated from the first grounding fixed contact 14, when the first movable contact 12 is matched with the bus 3 isolating switch in the combination switch, the handle is stopped from rotating, the movable door is closed after the handle is pulled out, the connection condition and the working procedure of the field electrical equipment are ensured to be applicable to safety, and misoperation is prevented.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. A gas insulated switchgear, the inner space of which comprises a bus bar compartment (a), characterized in that: the bus grounding switch (1) is arranged between the bus (3) and the three-station isolating switch (2), the bus grounding switch (1) comprises a first operating mechanism (11), a first moving contact (12), a first isolating static contact (13) and a first grounding static contact (14), the three-station isolating switch (2) comprises a switch-on static contact (22), the first isolating static contact (13) and the switch-on static contact (22) are combined together to form a combined static contact, and the first moving contact (12) makes linear reciprocating motion between the combined static contact and the first grounding static contact (14) under the action of the first operating mechanism (11).
2. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the bus grounding switch (1) is a direct-acting two-station bus grounding switch, the three-station isolating switch (2) is a disconnecting link type three-station isolating switch, the bus (3) is arranged on the upper portion of a bus chamber (a), the three-station isolating switch (2) is arranged on the lower portion of the bus chamber (a), the bus grounding switch (1) is arranged in the middle of the bus chamber (a), the combined static contact is located between the bus grounding switch (1) and the three-station isolating switch (2), and the switch-on static contact (22) in the combined static contact is located on one side close to the three-station isolating switch (2).
3. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the combined static contact comprises a cylindrical conductive block and a rectangular conductive block, the cylindrical conductive block is used as a first isolation static contact (13), the rectangular conductive block is used as a switch-on static contact (22), a cavity for a first moving contact (12) to extend into in a matching mode is arranged at one end of the cylindrical conductive block as a matching end, the other end of the cylindrical conductive block is used as a connecting end and is fixed to a bus chamber (a), and the rectangular conductive block is fixed to one side of the cylindrical conductive block.
4. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the bus chamber (a) is internally provided with a supporting insulator (15) and a first transmission sealing device (16), a first through hole is formed in one side of the bus chamber (a), the first through hole is sealed through the first transmission sealing device (16), the supporting insulator (15) is arranged on one side of the bus chamber (a) opposite to the first through hole, the combined static contact is arranged on the supporting insulator (15), a transmission lead screw (17) penetrates through the first transmission sealing device (16) in a sliding mode, one end of the transmission lead screw (17) is connected with an output shaft of the first operating mechanism (11), the other end of the transmission lead screw (17) penetrates through the first grounding static contact (14) to be connected with the first moving contact (12), and the first moving contact (12) moves linearly between the first grounding static contact (14) and the combined static contact under the driving of the transmission lead screw (17).
5. A gas-insulated switchgear cabinet according to claim 1, characterized in that: two ends of the first moving contact (12) are respectively provided with an annular groove, each annular groove is internally provided with a conductive contact finger, and the two conductive contact fingers are installed in a positive and negative mode.
6. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the three-station isolating switch (2) comprises a second operating mechanism (21), an insulating pull rod (23), a second moving contact component (26), a second grounding static contact seat (24) and a grounding insulator (27), wherein the grounding insulator (27) and the second grounding static contact seat (24) are arranged on one side, far away from a bus (3), in a bus chamber (a), the second moving contact component (26) is rotatably arranged on the grounding insulator (27), and under the driving of the second operating mechanism (21), the second moving contact component (26) rotates under the action of the insulating pull rod (23) and is matched with the second grounding static contact seat (24) or a switch-on static contact (22).
7. A gas-insulated switchgear, as claimed in claim 6, characterized in that: a second through hole is formed in one side of the bus chamber (a), a second transmission sealing device (25) used for sealing the second through hole is arranged on the second through hole, an output shaft of the second operating mechanism (21) penetrates through the second transmission sealing device (25) in a sliding mode, one end of an insulating pull rod (23) is connected with the output shaft of the second operating mechanism (21), the other end of the insulating pull rod (23) is connected with a second movable contact assembly (26), and under the driving of the second operating mechanism (21), the insulating pull rod (23) drives the second movable contact assembly (26) to rotate to be matched with a second grounding static contact seat (24) or a connecting static contact (22).
8. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the second movable contact assembly (26) comprises at least one pair of opposite conducting strips (26a) and connecting pieces (26b), one end of each conducting strip (26a) is rotatably installed on a central conductor of the grounding insulator (27), the other ends of the conducting strips (26a) are connected together through a connecting beam (26c), each connecting piece (26b) is cylindrical, a connecting arm (26d) is arranged in the middle of each connecting piece and used for being fixedly connected with the corresponding connecting beam (26c), and the two ends of each connecting piece (26b) are used for being rotatably connected with the corresponding insulating pull rod (23).
9. A gas-insulated switchgear cabinet as claimed in claim 8, characterized in that: the connecting beam (26c) is positioned in the middle of the conducting strips (26a) and enables the oppositely arranged conducting strips (26a) to be H-shaped, and a gap between the oppositely arranged conducting strips (26a) is used for being matched with the switch-on static contact (22) and the second grounding static contact seat (24).
10. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the combined static contact is connected with a bus (3) in a bus chamber (a) through a connecting bus (4); a first operating mechanism (11) of the bus grounding switch (1) is provided with a detachable handle, and a closable movable door is arranged at a handle socket.
11. A gas-insulated switchgear cabinet according to claim 1, characterized in that: the internal space of the three-station isolating switch also comprises a control room (b), a first operating mechanism (11) of the bus grounding switch (1) is arranged in the control room (b), a second operating mechanism (21) of the three-station isolating switch (2) is arranged in the control room (b), a first through hole and a second through hole are arranged on the side wall between the control room (b) and the bus room (a), a first transmission sealing device (16) is arranged in the first through hole, and an output shaft of the first operating mechanism (11) penetrates through the first transmission sealing device (16) to operate a first moving contact (12) in the bus room (a); and a second transmission sealing device (25) is arranged in the second through hole, and an output shaft of the second operating mechanism (21) passes through the second transmission sealing device (25) to operate the three-position isolating switch (2) in the bus chamber (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010101474.0A CN111130004A (en) | 2020-02-19 | 2020-02-19 | Gas insulation switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010101474.0A CN111130004A (en) | 2020-02-19 | 2020-02-19 | Gas insulation switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111130004A true CN111130004A (en) | 2020-05-08 |
Family
ID=70492068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010101474.0A Pending CN111130004A (en) | 2020-02-19 | 2020-02-19 | Gas insulation switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111130004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466701A (en) * | 2020-11-13 | 2021-03-09 | 许继（厦门）智能电力设备股份有限公司 | Double-fracture linkage type three-station isolation grounding switch structure |
| CN113917300A (en) * | 2021-10-08 | 2022-01-11 | 江苏安靠智能输电工程科技股份有限公司 | Direct connection device of gas-insulated high-voltage switch and power transformer |
-
2020
- 2020-02-19 CN CN202010101474.0A patent/CN111130004A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466701A (en) * | 2020-11-13 | 2021-03-09 | 许继（厦门）智能电力设备股份有限公司 | Double-fracture linkage type three-station isolation grounding switch structure |
| CN112466701B (en) * | 2020-11-13 | 2024-03-26 | 许继（厦门）智能电力设备股份有限公司 | Double-break linkage type three-station isolation grounding switch structure |
| CN113917300A (en) * | 2021-10-08 | 2022-01-11 | 江苏安靠智能输电工程科技股份有限公司 | Direct connection device of gas-insulated high-voltage switch and power transformer |
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