CN214227607U - Ring main unit - Google Patents
Ring main unit Download PDFInfo
- Publication number
- CN214227607U CN214227607U CN202120444125.9U CN202120444125U CN214227607U CN 214227607 U CN214227607 U CN 214227607U CN 202120444125 U CN202120444125 U CN 202120444125U CN 214227607 U CN214227607 U CN 214227607U
- Authority
- CN
- China
- Prior art keywords
- main unit
- ring main
- plate
- crank arm
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
本公开揭示了一种环网柜，该环网柜包括气箱、固定在该气箱的内侧壁上的固定框架、位于该气箱内的断路器开关，该断路器开关包括断路器本体。断路器本体包括绝缘外壳和位于绝缘外壳两端的第一端、第二端，第一端上设置有第一固定座，第二端设置有第二固定座，第一固定座和第二固定座均为金属件且均围成一屏蔽空间，以包覆设置在第一端上和第二端上的导电件，第一固定座通过一绝缘子固定在所述固定框架上，第二固定座通过另一个绝缘子固定在固定框架上。
The present disclosure discloses a ring main unit comprising an air box, a fixing frame fixed on the inner side wall of the air box, and a circuit breaker switch located in the air box, the circuit breaker switch including a circuit breaker body. The circuit breaker body includes an insulating shell, a first end and a second end located at both ends of the insulating shell, the first end is provided with a first fixing seat, the second end is provided with a second fixing seat, the first fixing seat and the second fixing seat They are all metal parts and enclose a shielding space to cover the conductive parts arranged on the first end and the second end. The first fixing seat is fixed on the fixing frame by an insulator, and the second fixing seat is Another insulator is fixed to the fixed frame.
Description
Technical Field
The utility model relates to an electrical equipment field, in particular to looped netowrk cabinet.
Background
With the enlargement of the installed scale of the national wind power generation, the single-machine capacity of the fan gradually develops to large scale and high power, and the machine set of 2MW and above gradually becomes a mainstream machine type. Most of the boosting transformers of the units of 2MW and above are arranged in a fan cabin or a tower drum, the outlet voltage of the fan tower drum side is 35kV, and according to the requirement of transformer capacity protection configuration, switch equipment, namely a 40.5kV ring main unit, needs to be arranged in the fan tower drum. The requirement for miniaturization of the ring main unit is higher and higher due to the limitation of the size of the fan tower drum door and the narrow space inside the fan tower drum. However, in order to satisfy the requirement of insulating property, the conventional ring main unit generally cannot reduce the size of the ring main unit, so that the requirement of miniaturization of the ring main unit in the field of wind power fields cannot be satisfied.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the size of the ring main unit is reduced and limited for meeting the requirement of insulating performance in the related art, the utility model provides a ring main unit capable of reducing the size.
The present disclosure provides a ring main unit, including:
a gas tank filled with an insulating gas;
the fixed frame is fixed on the inner side wall of the air box;
a circuit breaker switch, comprising:
the circuit breaker body, it includes insulating casing and is located first end, the second end at insulating casing both ends, first serving is provided with first fixing base, the second end is provided with the second fixing base, first fixing base with the second fixing base is the metalwork and all encloses into a shielding space, sets up with the cladding first serving with electrically conductive piece on the second end, first fixing base is fixed through an insulator on the fixed frame, the second fixing base is fixed through another insulator on the fixed frame.
Optionally, the circuit breaker switch further comprises:
the transmission crank arm is connected with a movable end arranged on the first end, part of the transmission crank arm and the movable end are positioned in a shielding space defined by the first fixed seat, and shielding plates for uniform electric fields are arranged on two sides of the other part of the transmission crank arm;
the insulating pull rod is connected with the transmission crank arm;
one end of the output crank arm is connected with the insulating pull rod; and
the output shaft is connected with the other end of the output crank arm;
the ring main unit further comprises an operating mechanism, and the operating mechanism is connected with the output shaft to drive the movable end to move.
Optionally, the first fixing seat includes a bottom wall and three side walls extending upwards from the bottom wall, the bottom wall and the three side walls enclose the shielding space, an opening is formed at the top and the side of the shielding space, and the transmission crank arm extends into the shielding space through the opening at the side.
Optionally, be provided with the inlet wire sleeve pipe on the gas tank, the circuit breaker body pass through the flexible coupling with inlet wire bushing connects, the flexible coupling is followed the opening at shielding space's top stretches to the inlet wire sleeve pipe, the inlet wire sleeve pipe with the junction of flexible coupling is provided with the shield cover of even electric field.
Optionally, the second fixing seat includes a connecting plate connected to the second insulator, side wings located on two sides of the connecting plate, a top plate located at the top of the connecting plate, and a bottom plate located at the bottom of the connecting plate, the two side wings, the top plate and the bottom plate enclose the shielding space, and a connecting member between the second insulator and the connecting plate is located in the shielding space of the second fixing seat.
Optionally, the shielding space is divided into two space compartments by the bottom plate, which are an upper space compartment and a lower space compartment respectively;
and an isolation static contact is arranged on the lower surface of the bottom plate and is positioned in the lower space compartment.
Optionally, the looped netowrk cabinet still is including being located three station switches of circuit breaker switch below and the three station operating device who is located the mechanism room, three station switches pass through the insulator fixing base and fix on the fixed frame, three station switches include:
the mechanism input shaft is connected with the three-station operating mechanism and driven by the three-station operating mechanism to rotate;
the crank arm plate is fixedly connected with the mechanism input shaft and can rotate along with the mechanism input shaft, and the crank arm plate is provided with a first end and a second end;
the grounding contact is fixed at the first end of the crank arm plate;
one end of the insulating connecting plate is connected with the second end of the crank arm plate;
the moving contact is movably connected with the other end of the insulating connecting plate, the first end of the moving contact is movably connected with the insulator fixing seat, the second end of the moving contact is a free end which can be electrically connected with the grounding contact and the isolating static contact, and the connection point of the moving contact and the insulating connecting plate is positioned between the first end and the second end of the moving contact;
when the three-station switch is used for grounding and opening, and the mechanism input shaft rotates towards a first direction, the first end of the crank arm plate drives the grounding contact to rotate towards the first direction, and the second end of the crank arm plate drives the movable contact to rotate towards a second direction opposite to the first direction through the insulating connecting plate, so that the grounding contact and the movable contact simultaneously move towards the opening direction;
when the three-station switch is grounded and switched on, the first end of the turning arm plate drives the grounding contact to rotate towards the second direction, the second end of the turning arm plate drives the moving contact to rotate towards the first direction through the insulating connecting plate, and the moving contact and the grounding contact move relatively to enable the moving contact and the grounding contact to move towards the switching-on direction simultaneously.
Optionally, two sides of the second end of the moving contact are provided with a moving contact shielding plate for uniform electric field;
and shielding plates are arranged on two sides of the joint of the first end of the moving contact and the insulator fixing seat and used for homogenizing an electric field.
Optionally, shielding plates for uniform electric fields are arranged on both sides of a first end of the crank arm plate connected with the ground contact and both sides of a second end of the crank arm plate connected with the insulating connecting plate.
Optionally, the ring main unit further comprises a wire outgoing sleeve arranged below the three-position switch, the wire outgoing sleeve is connected with the insulator fixing seat through a connecting copper rod, and a shielding cover is arranged at the joint of the wire outgoing sleeve and the connecting copper rod.
Optionally, the width of the ring main unit is 430mm, and the depth of the ring main unit is 850 mm.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the utility model provides a looped netowrk cabinet, this looped netowrk cabinet include the gas tank, fix fixed frame on the inside wall of this gas tank, be located the circuit breaker switch of this gas tank, and this circuit breaker switch includes the circuit breaker body. The circuit breaker body comprises an insulating shell, a first end and a second end, wherein the first end and the second end are located at two ends of the insulating shell, a first fixing seat is arranged on the first end, a second fixing seat is arranged at the second end, the first fixing seat and the second fixing seat are metal pieces and all enclose a shielding space, conductive pieces are arranged on the first end and the second end in a cladding mode, the first fixing seat is fixed on the fixed frame through an insulator, and the second fixing seat is fixed on the fixed frame through another insulator. First end and the second end of circuit breaker body are provided with the first fixing base and the second fixing base of even electric field respectively, so, for satisfying the mode that looped netowrk cabinet insulating properties required through increasing insulating gap or increasing insulating barrier among the conventional art, this disclosed scheme can satisfy the requirement of the insulating properties of looped netowrk cabinet under the condition that does not increase insulating gap and insulating barrier, has also reduced the looped netowrk cabinet volume to a certain extent, does benefit to the miniaturized development of looped netowrk cabinet. Simultaneously the circuit breaker body exposes the electrically conductive piece that sets up on first end and second end outside its insulating casing, the even electric field of rethread first fixing base and second fixing base, and needn't hold the cladding of the electrically conductive piece that sets up on first end and second end within insulating casing, so, for whole cladding, the holistic volume of circuit breaker body has also reduced, further do benefit to the miniaturized development of looped netowrk cabinet, still reduce insulating material (for example epoxy)'s use amount simultaneously, can also reach insulating environmental protection's purpose.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a front view of a ring main unit according to an exemplary embodiment.
Fig. 2 is a perspective view of the ring main unit according to an exemplary embodiment.
Fig. 3 is a front view of the ring main unit according to an exemplary embodiment.
Fig. 4 is a side view of the ring main unit shown according to an exemplary embodiment.
Fig. 5 is a rear view of the ring main unit according to an exemplary embodiment.
Detailed Description
For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.
The utility model provides a looped netowrk cabinet, this looped netowrk cabinet include the gas tank, fix fixed frame on the inside wall of this gas tank, be located the circuit breaker switch of this gas tank, and this circuit breaker switch includes the circuit breaker body. The circuit breaker body comprises an insulating shell, a first end and a second end, wherein the first end and the second end are located at two ends of the insulating shell, a first fixing seat is arranged on the first end, a second fixing seat is arranged at the second end, the first fixing seat and the second fixing seat are metal pieces and all enclose a shielding space, conductive pieces are arranged on the first end and the second end in a cladding mode, the first fixing seat is fixed on the fixed frame through an insulator, and the second fixing seat is fixed on the fixed frame through another insulator. The first end and the second end of circuit breaker body are provided with the first fixing base and the second fixing base of even electric field respectively, so, under the condition that does not increase insulating gap and insulating barrier, can satisfy looped netowrk cabinet's insulating properties's requirement, have also reduced looped netowrk cabinet volume to a certain extent, do benefit to the miniaturized development of looped netowrk cabinet. Simultaneously the circuit breaker body exposes the electrically conductive piece that sets up on first end and second end outside its insulating casing, the even electric field of rethread first fixing base and second fixing base, and needn't hold the cladding of the electrically conductive piece that sets up on first end and second end within insulating casing, so, for whole cladding, the holistic volume of circuit breaker body has also reduced, further do benefit to the miniaturized development of looped netowrk cabinet, still reduce insulating material (for example epoxy)'s use amount simultaneously, can also reach insulating environmental protection's purpose.
As shown in fig. 1, the present disclosure provides a ring main unit 100, and the ring main unit 100 can be applied to a 40.5kv switchgear. The ring main unit 100 includes a housing 101, and the housing 101 has a plurality of functional compartments therein. As shown in fig. 2 to 4, the function chamber includes an air tank 111, a low pressure chamber 112, a mechanism chamber 113, and a cable chamber 114. Wherein the gas box 111 is filled with an insulating gas, which may be, for example, sulfur hexafluoride or the like. The gas tank 111 is provided therein with a breaker switch 13, a three-position switch 16, and the like. The mechanism chamber 113 is provided with the operating mechanism 14 of the breaker switch 13 and the three-position operating mechanism 17 of the three-position switch 16.
The whole cuboid that is of gas tank 111, it adopts welding robot to form through the rotatory frock welding of programming cooperation, and this welding position is accurate, and the welding seam is even, has improved gas tank 111's precision, intensity, has also reduced gas tank 111's air leak rate simultaneously, and the gas tank 111's gas tightness is guaranteed to the at utmost.
Referring to fig. 5, a fixing frame 12 is disposed on an inner sidewall of the air box 111, the fixing frame 12 includes three supports 121 disposed at intervals on a left sidewall of the air box 111 and a fixing bracket 122 disposed on a front sidewall of the air box 111, and each support 121 is connected to the fixing bracket 122. Two ends of the breaker switch 13 are respectively fixed on two of the supports 121, and the three-position switch 16 is fixed on the other support. As shown in fig. 2, each support 121 includes a bent metal plate 1211 welded to the left sidewall of the air box 111, and a combined steel plate 1212 welded to the bent metal plate 1211 and formed by two channel steels.
As shown in fig. 3, the breaker switch 13 includes a breaker body 131, a transmission crank arm 132, an insulation pull rod 133, an output crank arm 134, and an output shaft 135.
The circuit breaker body 131 may be a vacuum circuit breaker including an insulating case and first and second ends at both ends of the insulating case. The insulating shell comprises a ceramic shell and epoxy resin wrapping the ceramic shell. The first end is provided with a first fixing seat 151, the second end is provided with a second fixing seat 152, and the first fixing seat 151 and the second fixing seat 152 are both metal pieces and enclose a shielding space so as to cover the conductive pieces arranged on the first end and the second end. The first fixing seat 151 is fixed to one of the supports 121 of the fixing frame 12 through an insulator 181, and the second fixing seat 152 is fixed to the other support 121 of the fixing frame 12 through another insulator 182.
The conductive member disposed on the first end includes, but is not limited to, a movable end 131a, a flexible connection 131c, a transmission lever 132, a fastening member for connecting the insulator 181 and the first fixing base 151, a fastening member for connecting the movable end 131a and the transmission lever 132, and the like.
The conductive member disposed on the second end includes, but is not limited to, an isolation stationary contact 131b, a fastener for connecting the insulator 182 and the second fixing base 152, a fastener for connecting the isolation stationary contact 131b and the second fixing base 152, and the like.
The circuit breaker body 131 exposes the conductive pieces arranged at the first end and the second end outside the insulating shell, and then the electric fields are uniform through the first fixing seat and the second fixing seat, so that the conductive pieces arranged at the first end and the second end are not required to be wrapped inside the insulating shell, and compared with the overall wrapping (i.e. the movable end 131a, the transmission crank arm 132, the isolation static contact 131b and the like are also wrapped inside the insulating shell), the overall size of the circuit breaker body is also reduced, the miniaturization development of the ring main unit is further facilitated, meanwhile, the usage amount of insulating materials (such as epoxy resin) is also reduced, and the purpose of insulation and environmental protection can be achieved.
The movable end 131a on the first end protrudes out of the insulating housing of the circuit breaker body 131 to be connected with the transmission crank arm 132. The movable end 131a is located in the shielding space of the first fixed seat 151.
First fixing base 151 includes the diapire and by the three lateral wall of diapire upwards extension, and diapire and three lateral wall enclose into the shielding space of U property to the conductive piece on the cladding first end, even electric field improves electric field distribution. The shielding space is formed with openings at the top and sides.
As shown in fig. 2, the flexible connection 131c extends up to the service bushing 191 through the opening at the top of the shielded space and is connected to the service bushing 191, and a shield 154 for uniform electric field is provided at the connection to improve the electric field distribution at the connection. The shielding cover 154 is in the shape of a cap and directly covers the connecting conductive member, such as a connecting bolt, at the connecting position. The service bushing 191 is mounted on the sidewall of the air box 111 on the same side as the support 121, and the service bushing 191 is positioned above the support 121.
As shown in fig. 3, one end of the transmission crank arm 132 extends into the shielding space through the opening at the side of the first fixing seat 151 to be connected to the movable end 131a at the first end, and the other end is connected to the insulation pull rod 133. A through hole is formed in the middle of the transmission crank arm 132, and a pin 1321 penetrates through the through hole and has two ends fixed to two opposite sidewalls of the first fixing base 151. The driving crank arm 132 can swing up and down relative to the pin 1321. Part of the transmission crank arms 132 are located in the shielding space enclosed by the first fixing seat 151, and the other part not covered by the shielding space is provided with a shielding plate, i.e. the two sides of the other part of the transmission crank arms are provided with the shielding plates 153 for uniform electric field, so that the transmission crank arms are located in the screen space enclosed by the first fixing seat 151 or between the two shielding plates 153 to sufficiently uniform the electric field on the transmission crank arms 132. Since the driving lever 132 itself is designed to be thin, the insulation level of the driving lever 132 can be increased by the uniform electric field of the first fixing base 151 and the shielding plate 153.
One end of the insulating pull rod 133 is connected with the transmission crank arm 132, and the electric field at the connection position can be uniform by the two shielding plates 153, and the other end is movably connected with one end of the output crank arm 134. The other end of the output crank arm 134 is fixed to the output shaft 135 by welding. An included angle is formed between the output crank arm 134 and the insulating pull rod 133, and when the output crank arm 134 rotates along with the output shaft 135, the insulating pull rod 133 can be driven to move up and down. One end of the output shaft 135 is connected to the operating mechanism 14. The operating mechanism 14 can drive the output shaft 135 to rotate. When the operating mechanism 14 drives the output shaft 135 to rotate in a first direction (e.g., counterclockwise), the output shaft 135 drives the output crank arm 134 to rotate upward, the output crank arm 134 drives the insulating pull rod 133 to move upward, and the insulating pull rod 133 drives the transmission crank arm 132 to pull the moving end 131a to move upward. When the operating mechanism 14 drives the output shaft 135 to rotate in a second direction (for example, clockwise), the output shaft 135 drives the output crank 134 to rotate downward, the output crank 134 drives the insulating pull rod 133 to move downward, and the insulating pull rod 133 drives the transmission crank 132 to pull the moving end 131a to move downward. Thus, the opening and closing of the breaker body 131 are realized.
As shown in fig. 2 and fig. 3, the second fixing base 152 includes a connecting plate 1521 connected to another insulator 182, side wings 1522 located at two sides of the connecting plate 1521, a top plate 1523 located at the top of the connecting plate 1521, and a bottom plate 1524 located at the bottom of the connecting plate 1521, wherein the connecting plate 1521, the side wings 1522, the top plate 1523, and the bottom plate 1524 enclose a shielding space of the second fixing base 152. A connection member (e.g., a connection bolt) between the other insulator 182 and the connection plate 1521 is located in the shielding space. The shielded space is divided by the bottom plate 1524 into two compartments, an upper compartment and a lower compartment. An isolation stationary contact 131b is disposed on the lower surface of the bottom plate 1524, and the isolation stationary contact 131b is located in the lower space compartment. The electric field of the conductive member at the lower end of the breaker body 131 can be distributed on each surface of the second fixing base 152 due to the arrangement of the second fixing base 152, so that the electric field can be uniformly distributed, the electric field distribution is improved, and the insulation level is increased.
The ring main unit 100 further includes a three-position switch 16 and a three-position operating mechanism 17 located below the breaker switch 13. The three-position switch 16 is fixed to a lowermost one of the holders 121 of the fixed frame 12 through the insulator fixing holder 161.
The three-position switch 16 includes a mechanism input shaft 162, a crank arm plate 163, a ground contact 164, an insulating link plate 165, and a movable contact 166.
The mechanism input shaft 162 is connected with the three-position operating mechanism 17 located in the operating chamber 113, and the three-position operating mechanism 17 can drive the mechanism input shaft 162 to rotate, so that the closing and opening of the three-position operating mechanism 17 are realized.
The crank arm plate 163 is fixedly connected to the mechanism input shaft 162 by welding and can rotate with the rotation of the mechanism input shaft 162. The crank arm plate 163 has a first end and a second end, the pin at the connection point of the crank arm plate 163 and the insulating connection plate 165 is substantially in the same straight line with the mechanism input shaft 162, the connection point of the first end of the crank arm plate 163 and the ground contact 164 deviates from the straight line, and the first end and the second end of the crank arm plate 163 are rotated in opposite directions by the action of the insulating connection plate 165 when the mechanism input shaft 162 is rotated. The area of the first end of the crank arm plate 163 is larger than that of the second end, and the area of the crank arm plate 163 gradually decreases from the first end to the second end.
The first end of the crank arm plate 163 is sleeved on the mechanism input shaft 162, and the portion of the first end of the crank arm plate 163 protruding from the mechanism input shaft 162 is connected to the ground contact 164 by a connector such as a screw. And shield plates 155 for uniform electric field are provided at both sides of the first end of the crank arm plate 163 connected with the ground contact 164. The shield plates 155 sandwich the connection of the crank arm plate 163 to the ground contact 164. The shield 155 may be connected to the ground contact 164 and the crank arm 163 by L-shaped connector plates. The outer periphery of the shielding plate 155 is of an arc structure, and the whole shielding plate is roughly elliptical, so that the electric field can be prevented from being concentrated at the tip end as much as possible through the special design of the structural shape of the shielding plate 155, the electric field at the joint is distributed on the plane of the shielding plate as much as possible, and the purpose of uniform electric field is achieved.
The ground contact 164 includes a lateral portion and a vertical portion that form a generally L-shaped configuration. The transverse portion is fixed to the ground strap 167. As shown in fig. 5, one end of the grounding strap 167 is connected to the housing of the ring main unit 100 through a flexible connection 168, so as to form a reliable grounding. The ground strap 167 is substantially long, so as to connect with the three-phase ground contacts 164, that is, when the ring main unit includes a plurality of ground contacts 164, each ground contact 164 is fixed on the ground strap 167 at intervals.
As shown in fig. 2 to 4, one end of the insulating connecting plate 165 is connected to the second end of the crank arm 163, and the shield plates 156 are provided on both sides of the connection between the insulating connecting plate 165 and the crank arm 163. The two shield plates 156 sandwich the joint between the insulating connecting plate 165 and the crank arm plate 163 to equalize the electric field at the joint and prevent the electric field from concentrating to cause component breakdown.
The other end of the insulating connecting plate 165 is connected with the moving contact 164 through a pin, so that the moving contact can be driven to rotate through the rotation of the mechanism input shaft 162. The movable contact 166 is generally elongated and the pin connecting the insulating web 165 and the movable contact 166 is located at or near the middle of the movable contact 166, and more specifically, between the first and second ends of the movable contact 166. The moving contact 166 has a first end movably connected to the insulator fixing seat 161 and a second end serving as a free end, and the free end can be electrically connected to the grounding contact 164 and the isolation stationary contact 131 b. The movable contact 166 can rotate relative to the insulator holder 161 by being pulled by the insulating connecting plate 165. The insulation connecting plate 165 and the crank arm plate 163 form an included angle, and the connecting point of the crank arm plate 163 and the insulation connecting plate 165 is located at the lower end of the insulation connecting plate 165. The insulating connecting plate 165 and the movable contact 166 form an included angle, and the included angle changes along with the rotation of the input shaft 162.
When the three-position switch is in an isolation opening state and a grounding opening state, and a part of the grounding switch needs to be closed, the mechanism input shaft 162 rotates under the drive of the three-position operating mechanism 17, when the mechanism input shaft 162 rotates in a second direction (for example, counterclockwise), the first end of the crank arm plate 163 drives the grounding contact random mechanism input shaft 162 to rotate in the second direction (for example, counterclockwise), the second end of the crank arm plate 163 drives the insulating connecting plate 165 to make the second end of the moving contact 166 rotate around the first end of the moving contact 166 in the first direction, that is, the second end of the moving contact 166 approaches the grounding contact 164 under the drive of the insulating connecting plate 165, and after rotating for a certain angle, the second end of the moving contact 166 is electrically contacted with the grounding contact 164, so as to realize grounding closing. Because the grounding contact 164 and the moving contact 166 move relatively and move towards the grounding closing direction at the same time, the closing speed of the grounding contact 164 and the moving contact 166 is increased, the arc burning time can be effectively reduced, the contact ablation is reduced, and the service life of a product is prolonged. Compared with the prior art that the switching-on speed is increased by increasing the spring energy and other modes of increasing the mechanism operation power, the three-position switch operating mechanism has the advantages that the service life of the three-position switch operating mechanism and the three-position switch is prolonged, and the stability of a product is improved.
When the ground switch needs to be opened, the mechanism input shaft 162 rotates in a first direction (i.e., clockwise), so as to drive the crank arm plate 163 to rotate, and simultaneously drive the ground contact 164 and the movable contact 166 to move in an opening direction, i.e., the ground contact 164 and the movable contact 166 move away from each other, the ground contact 164 rotates clockwise along with the mechanism input shaft 162, and the movable contact 166 moves counterclockwise around the first end thereof.
When the three-position switch is in an isolation and opening state and an earth opening state, and when the isolation switch part needs to be closed, the mechanism input shaft 162 moves in a first direction (for example, clockwise), the mechanism input shaft 162 drives the crank arm plate 163 to rotate, the first end of the crank arm plate 163 drives the earth contact 164 to rotate in the first direction, the second end of the crank arm plate 163 drives the movable contact 66 to rotate around the first end thereof in a second direction (for example, counterclockwise) opposite to the first direction through the insulating connecting plate 165, that is, the second end of the movable contact 166 approaches the isolation fixed contact 131b under the pushing of the insulating connecting plate 165, and after rotating for a certain angle, the second end of the movable contact 166 is electrically contacted with the isolation fixed contact 131b, so that isolation and closing are realized.
When the isolation switch part needs to be opened, the mechanism input shaft 162 rotates in the second direction (i.e. counterclockwise), so as to drive the crank arm plate 163 to rotate, the insulation connecting plate 165 drives the moving contact 166 to move in the direction of opening the isolation switch, and the isolation switch part returns to the opening state.
Two sides of the second end of the moving contact 166 are provided with moving contact shielding plates 157 for uniform electric field, and the second end of the moving contact 166 is clamped in the middle by the two moving contact shielding plates 157, so that the electric field at the tip end of the second end can be uniform.
The shielding plate 158 is also arranged on the two sides of the joint of the first end of the moving contact 166 and the insulator fixing seat 161, and the shielding plate 158 is approximately circular, so that an electric field can be more uniformly distributed on the shielding plate 158, and the concentration of the electric field is avoided as much as possible.
As shown in fig. 2, the ring main unit 100 further includes a wire outlet sleeve 21 disposed below the three-position switch 16, and the wire outlet sleeve 21 is connected to the insulator fixing seat 161 through a connecting copper rod 22. The junction of the outgoing line bushing 21 and the connecting copper rod 22 is provided with a shield 159, and the shield 159 is used for homogenizing the electric field at the junction.
In the electric wire netting that above-mentioned looped netowrk cabinet can use three phase current, correspond, this looped netowrk cabinet can be provided with each corresponding circuit breaker switch, three station switches. As shown in fig. 2 to 5, the ring main unit 100 applies a three-phase current power grid, and three breaker switches and three-position switches are correspondingly disposed. Wherein, the output shaft of each phase breaker switch is the same, and the mechanism input shaft of each three-station switch is the same.
In this disclosure, increase shield plate or shield cover in the place that circuit breaker switch and three-station switch probably produced the electric field gathering to satisfy the requirement of insulating properties, and need not increase isolation clearance, thereby reached the mesh that has reduced looped netowrk cabinet size, and the electrically conductive piece on circuit breaker switch's both ends does not coat in its insulating casing, the holistic size of this circuit breaker switch has also correspondingly reduced, make this disclosed looped netowrk cabinet's cabinet dark can reduce to 850mm, the cabinet width can reduce to 430 mm. Compared with the traditional ring main unit with the depth of more than 900mm and the width of more than 550mm, the size of the ring main unit is obviously reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.
Claims (11)
1. A ring main unit, comprising:
a gas tank filled with an insulating gas;
the fixed frame is fixed on the inner side wall of the air box;
a circuit breaker switch, comprising:
the circuit breaker body, it includes insulating casing and is located first end, the second end at insulating casing both ends, first serving is provided with first fixing base, the second end is provided with the second fixing base, first fixing base with the second fixing base is the metalwork and all encloses into a shielding space, sets up with the cladding first serving with electrically conductive piece on the second end, first fixing base is fixed through an insulator on the fixed frame, the second fixing base is fixed through another insulator on the fixed frame.
2. The ring main unit as claimed in claim 1, wherein the circuit breaker switch further comprises:
the transmission crank arm is connected with a movable end arranged on the first end, part of the transmission crank arm and the movable end are positioned in a shielding space defined by the first fixed seat, and shielding plates for uniform electric fields are arranged on two sides of the other part of the transmission crank arm;
the insulating pull rod is connected with the transmission crank arm;
one end of the output crank arm is connected with the insulating pull rod; and
the output shaft is connected with the other end of the output crank arm;
the ring main unit further comprises an operating mechanism, and the operating mechanism is connected with the output shaft to drive the movable end to move.
3. The ring main unit as claimed in claim 2, wherein the first fixing seat includes a bottom wall and three side walls extending upward from the bottom wall, the bottom wall and the three side walls enclose the shielding space, openings are formed at the top and the side of the shielding space, and the transmission crank arm extends into the shielding space through the opening at the side.
4. The ring main unit as claimed in claim 3, wherein the gas tank is provided with a wire inlet bushing, the circuit breaker body is connected with the wire inlet bushing through a flexible connection, the flexible connection extends from an opening at the top of the shielding space to the wire inlet bushing, and a shielding cover for uniform electric field is arranged at the connection between the wire inlet bushing and the flexible connection.
5. The ring main unit as claimed in claim 1, wherein the second fixing seat includes a connecting plate connected to the other insulator, side wings located at two sides of the connecting plate, a top plate located at a top of the connecting plate, and a bottom plate located at a bottom of the connecting plate, the two side wings, the top plate and the bottom plate define the shielding space, and a connecting member between the other insulator and the connecting plate is located in the shielding space of the second fixing seat.
6. The ring main unit as claimed in claim 5, wherein the shielding space is divided into two space compartments by the base plate, an upper space compartment and a lower space compartment;
and an isolation static contact is arranged on the lower surface of the bottom plate and is positioned in the lower space compartment.
7. The ring main unit as claimed in claim 6, wherein the ring main unit further includes a three-position switch located below the breaker switch and a three-position operating mechanism located in the mechanism chamber, the three-position switch is fixed on the fixing frame through an insulator fixing seat, and the three-position switch includes:
the mechanism input shaft is connected with the three-station operating mechanism and driven by the three-station operating mechanism to rotate;
the crank arm plate is fixedly connected with the mechanism input shaft and can rotate along with the mechanism input shaft, and the crank arm plate is provided with a first end and a second end;
the grounding contact is fixed at the first end of the crank arm plate;
one end of the insulating connecting plate is connected with the second end of the crank arm plate;
the moving contact is movably connected with the other end of the insulating connecting plate, the first end of the moving contact is movably connected with the insulator fixing seat, the second end of the moving contact is a free end which can be electrically connected with the grounding contact and the isolating static contact, and the connection point of the moving contact and the insulating connecting plate is positioned between the first end and the second end of the moving contact;
when the three-station switch is used for grounding and opening, and the mechanism input shaft rotates towards a first direction, the first end of the crank arm plate drives the grounding contact to rotate towards the first direction, and the second end of the crank arm plate drives the movable contact to rotate towards a second direction opposite to the first direction through the insulating connecting plate, so that the grounding contact and the movable contact simultaneously move towards the opening direction;
when the three-station switch is grounded and switched on, the first end of the turning arm plate drives the grounding contact to rotate towards the second direction, the second end of the turning arm plate drives the moving contact to rotate towards the first direction through the insulating connecting plate, and the moving contact and the grounding contact move relatively to enable the moving contact and the grounding contact to move towards the switching-on direction simultaneously.
8. The ring main unit as claimed in claim 7, wherein the second end of the moving contact is provided with a moving contact shielding plate at both sides for uniform electric field;
and shielding plates are arranged on two sides of the joint of the first end of the moving contact and the insulator fixing seat and used for homogenizing an electric field.
9. The ring main unit as claimed in claim 7, wherein shielding plates for uniform electric field are disposed on both sides of the first end of the arm plate connected to the ground contact and both sides of the second end of the arm plate connected to the insulating connecting plate.
10. The ring main unit as claimed in claim 7, wherein the ring main unit further includes a wire outlet sleeve disposed below the three-position switch, the wire outlet sleeve is connected to the insulator fixing seat through a connecting copper rod, and a shielding cover is disposed at a connection position of the wire outlet sleeve and the connecting copper rod.
11. The ring main unit as claimed in claim 1, wherein the width of the ring main unit is 430mm, and the depth of the ring main unit is 850 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120444125.9U CN214227607U (en) | 2021-03-01 | 2021-03-01 | Ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120444125.9U CN214227607U (en) | 2021-03-01 | 2021-03-01 | Ring main unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214227607U true CN214227607U (en) | 2021-09-17 |
Family
ID=77692833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120444125.9U Active CN214227607U (en) | 2021-03-01 | 2021-03-01 | Ring main unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214227607U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000866A (en) * | 2021-03-01 | 2022-09-02 | 厦门华电开关有限公司 | Ring main unit |
| WO2025246549A1 (en) * | 2024-05-30 | 2025-12-04 | 厦门华电开关有限公司 | Three-position switch and ring main unit |
-
2021
- 2021-03-01 CN CN202120444125.9U patent/CN214227607U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000866A (en) * | 2021-03-01 | 2022-09-02 | 厦门华电开关有限公司 | Ring main unit |
| CN115000866B (en) * | 2021-03-01 | 2025-09-09 | 厦门华电开关有限公司 | Ring main unit |
| WO2025246549A1 (en) * | 2024-05-30 | 2025-12-04 | 厦门华电开关有限公司 | Three-position switch and ring main unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115000866A (en) | Ring main unit | |
| CN206595185U (en) | A kind of gas-insulated switchgear breaker | |
| CN214227607U (en) | Ring main unit | |
| CN105448578B (en) | A kind of disconnecting switch and its conductor | |
| CN222814144U (en) | Ring main unit | |
| JP4818972B2 (en) | Gas circuit breaker | |
| CN209592774U (en) | A kind of structure of gas-insulated ring network cabinet | |
| CN222581890U (en) | Three-station switch and ring main unit | |
| CN110970271A (en) | Circuit breaker and gas insulated switchgear using same | |
| CN109510098B (en) | An insulating switch device | |
| CN220324349U (en) | Quick grounding switch and gas-insulated fully-enclosed combined electrical appliance | |
| CN209217565U (en) | A kind of insulated switching installation | |
| CN216530002U (en) | Combined switch equipment and load switch thereof | |
| CN116741565A (en) | Three-station isolating switch device and inflatable cabinet | |
| CN215378183U (en) | Anti-static distribution box for power communication | |
| CN217159246U (en) | GIS lightning arrester installation device capable of conducting withstand voltage test | |
| WO2021104525A1 (en) | Circuit breaker and gas-insulated switchgear using the circuit breaker | |
| CN209592773U (en) | A kind of full-shield ring network cabinet pole | |
| CN111192783A (en) | Quick earthing switch | |
| CN220306148U (en) | Three-station isolating switch device and inflatable cabinet | |
| RU2420847C2 (en) | Power switch with body | |
| CN213906094U (en) | Circuit breaker and isolator's combined mechanism | |
| JP2003045301A (en) | Gas-insulated switching device | |
| CN118538569B (en) | A fully enclosed three-position vacuum circuit breaker | |
| CN223079035U (en) | Inflatable cabinet switch with expanded top |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |