CN112635237B - Arc extinguishing switch for ring main unit - Google Patents
Arc extinguishing switch for ring main unit Download PDFInfo
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- CN112635237B CN112635237B CN202011543115.7A CN202011543115A CN112635237B CN 112635237 B CN112635237 B CN 112635237B CN 202011543115 A CN202011543115 A CN 202011543115A CN 112635237 B CN112635237 B CN 112635237B
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- mounting tube
- rod
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- 238000009434 installation Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000008033 biological extinction Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66223—Details relating to the sealing of vacuum switch housings
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an arc extinguishing switch for a ring main unit, which comprises a shell, a deflector rod and a switch body, wherein the deflector rod is connected onto the shell in a sliding way and extends out of the shell; the deflector rod is poked to one end of the piston driving rod extending out of the mounting tube; the mounting tube is provided with a first contact, the first contact is flush with the inner wall of the mounting tube, the piston connecting column is provided with a second contact, and the second contact is in contact conduction with the first contact when the piston connecting column slides to one end of the mounting tube; the installation tube and the piston connecting column are made of ceramic materials, and sealing rings are arranged on the peripheries of the piston connecting column and the piston driving rod.
Description
Technical Field
The invention relates to the field of power transmission and transformation, in particular to an arc extinguishing switch for a ring main unit.
Background
The ring main unit is a group of high-voltage switch equipment which is arranged in the steel plate metal cabinet body or is made into an electric equipment for assembling the interval ring main power supply unit, and has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like. The load switch can generate arc sparks in the opening and closing process, and arc extinguishing treatment is needed for the high-voltage circuit switch in order to prevent the occurrence of arc to damage peripheral components and prevent spark heating and melting or black burning of switch contacts when the switch is closed.
The most commonly used arc extinguishing device is a vacuum arc extinguishing chamber, which is also called a vacuum switch tube, and mainly causes a medium-high voltage circuit to avoid generating electric arcs in the process of closing a power supply through excellent insulativity of vacuum in the tube. Although the vacuum arc extinguishing chamber is small in size and convenient to use, the vacuum arc extinguishing chamber is complicated to produce due to the fact that vacuumizing treatment is needed, the vacuum degree in the use process cannot be guaranteed, if the vacuum arc extinguishing chamber generates tiny cracks to enter air, whether the vacuum arc extinguishing chamber is reliably closed or not cannot be judged in time, and danger is easily caused by generated arc sparks.
Therefore, there is a need for an arc-extinguishing switch for a ring main unit, which is convenient to produce and has high reliability, and can solve the problems.
Disclosure of Invention
The invention aims to provide a novel technical scheme of an arc-extinguishing switch for a ring main unit.
According to a first aspect of the invention, there is provided an arc extinguishing switch for a ring main unit, comprising a housing, a deflector rod and a switch body, wherein the deflector rod is connected to the housing in a sliding manner and extends out of the housing, the switch body is installed in the housing, the switch body comprises an installation tube, the installation tube is fixed in the housing, the installation tube is a tube body with two open ends, a piston connecting column is connected in the installation tube in a sliding manner, the piston connecting column is in clearance fit with the installation tube, two ends of the installation tube are connected with piston driving rods in a sliding manner, one ends of the piston driving rods are propped against the end parts of the piston connecting column, and the other ends of the piston driving rods extend out of the installation tube; the deflector rod is poked to one end of the piston driving rod, which extends out of the mounting tube; the mounting tube is provided with a first contact, the first contact is flush with the inner wall of the mounting tube, the piston connecting column is provided with a second contact, and the second contact is in contact conduction with the first contact when the piston connecting column slides to one end of the mounting tube; the installation tube and the piston connecting column are made of ceramic materials, and sealing rings are arranged on the peripheries of the piston connecting column and the piston driving rod.
According to the scheme, the piston driving rod is kept in contact with the piston connecting column during installation, when the driving rod dials the piston driving rod, due to the sealing between the piston connecting column and the installation pipe, along with the pulling of the piston driving rod, the space between the piston driving rod and the piston connecting column is enlarged, the space is in a vacuum state, and due to the action of external air pressure, the piston connecting column can move towards the direction of the piston driving rod, so that the first contact and the second contact are in contact communication in a sideslip manner; the generation of an arc is suppressed or reduced due to the vacuum state in the installation tube and the narrow contact space between the first contact and the second contact. The device has simple structure, does not need vacuumizing treatment during production, thus being beneficial to reducing the production difficulty, improving the production efficiency and reducing the production cost; and because the piston connecting column belongs to passive movement, when any part is damaged to cause air leakage, the piston connecting column can not be driven by atmospheric pressure, so that the device can not be conducted, and the reliability and safety of the device in use are greatly improved.
Preferably, a first connection post is connected to one end of the first contact exposed out of the mounting tube, and a second connection post is provided on a side of the mounting tube opposite to the first connection post, and the second connection post is connected to the second contact through a wire.
Through this scheme, realize the external connection of first contact and second contact to guarantee the inside leakproofness of installation tube.
Preferably, the inner wall of the mounting tube is provided with a containing cavity, the second connecting column penetrates into the containing cavity, and a wire between the second connecting column and the second contact is arranged in the containing cavity; the length of the accommodating cavity is not smaller than the sliding distance of the piston connecting column; the two ends of the piston connecting column are always positioned at the two sides of the accommodating cavity.
Through this scheme, the wire sets up in holding the chamber to can guarantee the normal activity of piston spliced pole, avoid the dragging of wire to influence the slip of piston spliced pole.
Preferably, the piston connecting column is provided with a containing hole, the containing hole is a blind hole, and the second contact is elastically connected into the containing hole through a spring; the spring always applies an outward pushing force to the second contact.
Through this scheme, the second contact can compress tightly to on the first contact under the elasticity of spring, guarantees the compactness of connection, avoids leading to the electric arc to produce because of existence gap between first contact and the second contact.
Preferably, the cross section of the piston connecting column is elliptical, and the cross section shape of the inner cavity of the mounting tube is consistent with that of the piston connecting column.
Through this scheme, oval sectional area not only can avoid the piston spliced pole to rotate in the installation pipe, plays the effect of location, still helps the installation of sealing ring, avoids the poor problem of sealed effect because of the existence of edges and corners leads to.
Preferably, the piston driving rod comprises a piston head, a connecting rod and a driving block, wherein the piston head is positioned in the mounting tube for piston movement, one end of the connecting rod is connected with the piston head, and the other end of the connecting rod extends out of the mounting tube and is connected with the driving block.
Through this scheme, the sealing ring sets up on the piston head, realizes piston head and the piston sealing connection of installation pipe inner wall.
Preferably, a positioning rod is radially arranged on the mounting tube, and is slidably connected to the mounting tube, and the positioning rod is used for positioning the on position and the off position of the piston connecting column.
By the scheme, the positioning rod can ensure the reliability of the first contact and the second contact when being connected or disconnected, and self-closing or closing is avoided; and after the deflector rod is stirred, a certain vacuum space is generated between the piston head and the piston connecting column, so that whether the device is damaged or not is verified, if the device is not damaged, the piston connecting column can act under the action of external atmospheric pressure after the positioning rod is pulled out, and if the device is damaged, the device cannot act due to the entering of air, so that the safety of the device in use is further improved.
Preferably, the piston connecting column is provided with a switch-on positioning hole and a switch-off positioning hole, and the positioning rod is inserted into the switch-on positioning hole or the switch-off positioning hole to position the piston connecting column to a switch-on position or a switch-off position.
Through this scheme, the setting of switch-on locating hole and switch-off locating hole guarantees that this device can be accurate switch-on and switch-off.
Preferably, the positioning rod is connected to the pressure rod through a pry bar, the middle of the pry bar is hinged to the shell, two ends of the pry bar are respectively hinged to the end part of the positioning rod and the end part of the pressure rod, and the other end of the pressure rod extends out of the shell.
Through this scheme, press the depression bar, can realize that the locating lever pulls out the operation of switch-on locating hole or switch-off locating hole, outwards pull out the depression bar, realize the location operation of locating lever, convenient operation.
Preferably, a return spring is arranged between the pressure lever and the housing, and the return spring always applies a force to the pressure lever in a direction of pushing out the housing.
Through this scheme, only need press the operation that the plunger spliced pole can be realized to the depression bar when the operation, loosens the depression bar and can realize automatic positioning after the plunger spliced pole reaches the position, has further made things convenient for the operation.
According to one embodiment of the present disclosure, the device has a simple and smart structure, is convenient to use, not only can perform vacuum arc extinction, but also greatly reduces the space generated by the arc, and has a good arc extinction effect;
the production process does not need vacuumizing treatment, so that the production efficiency is greatly improved, the production difficulty is reduced, and the production cost is reduced;
if breakage and air leakage occur, the device can lose normal on and off functions, and the possibility of on under the condition of air is avoided, so that the safety during use is greatly improved.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of an arc extinguishing switch for a ring main unit according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of A-A direction of a switch body in the arc extinguishing switch for the ring main unit of fig. 1.
Fig. 3 is a schematic cross-sectional structure in the direction B-B in fig. 2.
Fig. 4 is a schematic cross-sectional structure in the direction C-C of fig. 2.
Fig. 5 is a schematic structural view of a plunger coupling post in the switch body of fig. 2.
Fig. 6 is a schematic structural view of a mounting tube in the switch body of fig. 2.
Fig. 7 is a schematic view of the structure of the piston driving rod in the switch lifter of fig. 2.
Fig. 8 is a schematic diagram of a connection structure between the positioning rod and the pressing rod in fig. 4.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Examples
As shown in fig. 1 to 8, the arc extinguishing switch for a ring main unit in this embodiment includes a housing 3000, a lever 2000 and a switch body 1000, the lever 2000 is slidably connected to the housing 3000 and extends out of the housing 3000, the switch body 1000 is mounted in the housing 3000, the switch body 1000 includes a mounting tube 1100, the mounting tube 1100 is fixed in the housing 3000, the mounting tube 1100 is a tube body with two open ends, a piston connecting post 1200 is slidably connected in the mounting tube 1100, the piston connecting post 1200 is in clearance fit with the mounting tube 1100, two ends of the mounting tube 1100 are slidably connected with a piston driving rod 1300, one end of the piston driving rod 1300 is abutted to an end of the piston connecting post 1200, and the other end of the piston driving rod 1300 extends out of the mounting tube 1100; the shift lever 2000 is shifted to one end of the piston driving lever 1300 extending out of the mounting tube 1100; a first contact 1110 is arranged on the mounting tube 1100, the first contact 1110 is flush with the inner wall of the mounting tube 1100, a second contact 1210 is arranged on the piston connecting column 1200, and the second contact 1210 is in contact conduction with the first contact 1110 when the piston connecting column 1200 slides to one end of the mounting tube 1100; the mounting pipe 1100 and the piston connecting column 1200 are made of ceramic materials, and sealing rings (not shown in the drawings) are provided on the outer circumferences of the piston connecting column 1200 and the piston driving rod 1300.
According to the scheme, when the piston driving rod 1300 is in contact with the piston connecting column 1200 during installation, when the driving rod 2000 is shifted to the piston driving rod 1300, the space between the piston driving rod 1300 and the piston connecting column 1200 is increased along with the pulling of the piston driving rod 1300 due to the piston sealing between the piston connecting column 1200 and the installation tube 1100, the space is in a vacuum state, and the piston connecting column 1200 moves towards the shifted direction of the piston driving rod 1300 due to the action of external air pressure, so that the first contact 1110 and the second contact 1210 are in contact communication in a sideslip manner; the generation of arc is suppressed or reduced due to the vacuum state of the formulation of the plunger drive rod 1300 and the plunger connecting rod 1200 after movement, and the narrow contact space between the first contact 1110 and the second contact 1210.
The device has simple structure, does not need vacuumizing treatment during production, thus being beneficial to reducing the production difficulty, improving the production efficiency and reducing the production cost; moreover, since the piston connecting column 1200 is passively moved, when any part is damaged to cause air leakage, air can enter the mounting tube 1100 when the piston driving rod 1300 is pulled, and the piston connecting column 1200 can not be driven by atmospheric pressure, so that the device can not be conducted, and the reliability and safety of the device in use are greatly improved.
In this embodiment or other embodiments, a first connection post 1111 is connected to an end of the first contact 1110 exposed to the mounting tube 1100, and a second connection post 1120 is disposed on a side of the mounting tube 1100 opposite to the first connection post 1111, and the second connection post 1120 is connected to the second contact 1210 through a wire 1213. External connection of the first contact 1110 and the second contact 1210 is achieved, and sealability inside the mounting tube 1100 is ensured.
The first connection column 1111 and the second connection column 1120 are, for example, bolts to which nuts are screwed to achieve connection of wires, thereby achieving external connection of the first contact 1110 and the second contact 1210.
In this embodiment or other embodiments, the inner wall of the mounting tube 1100 is provided with a receiving cavity 1121, the second connection post 1120 penetrates into the receiving cavity 1121, and a wire 1213 between the second connection post 1120 and the second contact 1210 is disposed in the receiving cavity 1121; the length of the receiving cavity 1121 is not less than the sliding distance of the piston connecting column 1200; the two ends of the piston connecting column 1200 are always located at the two sides of the accommodating cavity 1121, and the conducting wires 1213 are arranged in the accommodating cavity 1121, so that the normal movement of the piston connecting column 1200 can be ensured, the sliding of the piston connecting column 1200 is prevented from being influenced by the dragging of the conducting wires 1213, and the reliability of the device in use is improved.
In this embodiment or other embodiments, the piston connecting column 1200 is provided with a receiving hole 1211, the receiving hole 1211 is a blind hole, and the second contact 1210 is elastically connected to the receiving hole 1211 through a spring 1212; the spring 1212 always applies an outward pushing force to the second contact 1210. The second contact 1210 can be pressed onto the first contact 1110 under the elastic force of the spring 1212, so as to ensure the connection tightness, and avoid the occurrence of an arc between the first contact 1110 and the second contact 1210 due to the existence of a gap.
In this embodiment or other embodiments, the cross section of the piston connecting column 1200 is elliptical, the cross section of the inner cavity of the mounting tube 1100 is identical to the cross section of the piston connecting column 1200, the elliptical cross section not only can avoid the piston connecting column 1200 rotating in the mounting tube and play a role in positioning, but also facilitates the mounting of the sealing ring, the smooth appearance can ensure that the sealing ring is tightly attached to the inner wall of the mounting tube 1100 and the outer wall of the piston connecting column 1200, and the problem of poor sealing effect caused by the existence of edges is avoided.
In this or other embodiments, the piston drive rod 1300 includes a piston head 1310, a connecting rod 1320, and a drive block 1330, where the piston head 1310 is located in the mounting tube 1100 for piston movement, one end of the connecting rod 1320 is connected to the piston head 1310, and the other end of the connecting rod 1320 extends out of the mounting tube 1100 and is connected to the drive block 1330. A sealing ring is disposed on the piston head 1310 to effect a sealing connection of the piston head 1310 to the piston of the inner wall of the mounting tube 1100.
One end of the mounting tube 1100 in this embodiment is provided with a piston hole 1102 through which a connecting rod 1320 extends out of the mounting tube 1100 and is slidably connected with the piston hole 1102, the lifting piston driving rod 1300 can move along the axis of the mounting tube 1100, and a plurality of ventilation holes 1101 are arranged on the periphery of the piston hole 1102, so that the piston driving rod 1300 cannot become laborious due to compressed air between the piston head 1310 and the piston hole 1102 in the moving process.
In this or other embodiments, the mounting tube 1100 is radially provided with a positioning rod 1410, the positioning rod 1410 is slidably connected to the mounting tube 1100, and the positioning rod 1410 is used to position the on position and the off position of the piston connecting rod 1200. The positioning rod 1410 is sleeved with a sealing ring, so that air leakage is avoided at the positioning rod 1410.
The positioning rod is arranged, so that reliability of the first contact 1110 and the second contact 1210 when being connected or disconnected can be guaranteed, and self-closing or closing is avoided; after the deflector rod 2000 is shifted, a certain vacuum space is generated between the piston head 1310 and the piston connecting column 1200 so as to verify whether the device is damaged, if not, the piston connecting column 1200 can act under the action of external atmospheric pressure after the positioning rod 1410 is pulled out, so that the first contact 1110 and the second contact 1210 are conducted; if damaged, the pressure difference at two sides of the piston connecting column 1200 becomes smaller due to the air entering, so that the device cannot act, the safety of the device in use is further improved, and the occurrence of electric arcs and dangers caused by air leakage is avoided.
In this or other embodiments, the plunger 1200 is provided with an on-position hole 1222 and an off-position hole 1221, and the positioning rod 1410 is inserted into the on-position hole 1222 or the off-position hole 1221 to position the plunger 1200 to an on-position or an off-position. The provision of the on-position holes 1222 and off-position holes 1221 ensures that the device can be turned on and off accurately.
In this embodiment or other embodiments, the positioning rod 1410 is connected to the lever 1420 by a pry bar 1430, the middle of the pry bar 1430 is hinged to the housing 3000, two ends of the pry bar 1430 are respectively hinged to the end of the positioning rod 1410 and the end of the lever 1420, and the other end of the lever 1420 extends out of the housing 3000. Pressing the lever 1420 can realize the operation of pulling out the positioning lever 1410 from the on-positioning hole 1222 or off-positioning hole 1221, pulling out the lever 1420 outwards, realizing the operation of inserting and positioning the positioning lever 1410, and facilitating the operation.
The positioning rod 1410 and the end of the compression bar 1420 in this embodiment are both provided with kidney-shaped holes, into which the pry bar 1430 is hinged, and since the pry bar 1430 changes angle with the positioning rod 1410 and the compression bar 1420 during rotation, a certain displacement in the horizontal direction occurs, the arrangement of the kidney-shaped holes can adapt to the change in the horizontal direction.
In this embodiment or other embodiments, a return spring 1421 is disposed between the compression bar 1420 and the housing 3000, the return spring 1421 always applies a force to the compression bar 1420 in a direction of pushing out the housing 3000, and when the operation is performed, the operation of the piston connecting column 1200 can be performed only by pressing the compression bar 1420, and when the piston connecting column 1200 reaches the position, the automatic positioning can be performed by releasing the compression bar 1420, thereby further facilitating the operation.
The lever 2000 in this embodiment is provided with two dials (not shown in the drawings), which are respectively matched with the two driving blocks 1330, and the dials are disposed between the driving blocks 1330 and the mounting tube 1100, so that the driving blocks 1330 can be only shifted toward a direction far away from one side of the mounting tube 1100.
Before the device is used, the tight combination of the piston head 1310 and the piston connecting column 1200 is kept to discharge air, at this time, the first contact 1110 and the second contact 1210 are in an off state, when the device needs to be connected, the deflector rod 2000 is pushed upwards, the upper deflector plate pushes the upper piston driving rod 1300 to move upwards, because the positioning rod 1410 is inserted into the off positioning hole 1221, the piston connecting column 1200 does not act, if the device is kept in an intact state, the piston connecting column 1200 and the piston head 1310 are in a vacuum state, at this time, the pressing rod 1420 is pressed, the positioning rod 1410 pulls out the off positioning hole 1221, the piston connecting column 1200 acts or moves upwards under the action of atmospheric pressure, and the second contact 1210 is contacted and conducted with the first contact 1110; at this time, the piston driving rod 1300 at the bottom is also moved upward by the atmospheric pressure; after the lever 1420 is released, the positioning lever 1410 is inserted into the positioning hole 1222 under the urging force of the return spring 1421.
If the present device is in the air leakage state, the piston connecting rod 1200 cannot be driven by the atmospheric pressure due to the presence of air between the piston connecting rod 1200 and the piston head 1310, and the connection operation is not performed.
If the device needs to be turned off, the shift lever 2000 is moved downwards, the lower shift plate is moved downwards, the lower driving block 1330 is shifted downwards, a vacuum cavity is generated between the lower piston head 1310 and the piston connecting column 1200, the pressing rod 1420 is pressed downwards, the positioning rod 1410 is pulled out of the on positioning hole 1222, the piston connecting column 1200 moves downwards, and the first contact 1110 and the second contact 1210 are turned off.
According to the embodiment, the device is simple and ingenious in structure and convenient to use, not only can be used for vacuum arc extinction, but also greatly reduces the space generated by an electric arc, and has a good arc extinction effect;
the production process does not need vacuumizing treatment, so that the production efficiency is greatly improved, the production difficulty is reduced, and the production cost is reduced;
if breakage and air leakage occur, the device can lose normal on and off functions, and the possibility of on under the condition of air is avoided, so that the safety during use is greatly improved.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. The utility model provides an arc extinguishing switch for looped netowrk cabinet, includes casing, driving lever and switch body, the driving lever sliding connection is to on the casing and extend the casing, the switch body is installed to in the casing, its characterized in that, the switch body includes the installation pipe, the installation pipe is fixed to in the casing, the installation pipe is both ends open-ended body, sliding connection has the piston spliced pole in the installation pipe, the piston spliced pole with installation pipe clearance fit, the both ends sliding connection of installation pipe has the piston actuating lever, the one end of piston actuating lever all supports to the tip of piston spliced pole, the other end of piston actuating lever all stretches out the installation pipe; the deflector rod is poked to one end of the piston driving rod, which extends out of the mounting tube; the mounting tube is provided with a first contact, the first contact is flush with the inner wall of the mounting tube, the piston connecting column is provided with a second contact, and the second contact is in contact conduction with the first contact when the piston connecting column slides to one end of the mounting tube; the mounting tube and the piston connecting column are made of ceramic materials, and sealing rings are arranged on the peripheries of the piston connecting column and the piston driving rod; a positioning rod is radially arranged on the mounting tube, the positioning rod is connected to the mounting tube in a sliding manner, and the positioning rod is used for positioning the on position and the off position of the piston connecting column; the piston connecting column is provided with a connection positioning hole and a disconnection positioning hole, and the positioning rod is inserted into the connection positioning hole or the disconnection positioning hole to position the piston connecting column to a connection position or a disconnection position; the locating lever is connected to the pressure lever through a pry bar, the middle of the pry bar is hinged to the shell, two ends of the pry bar are respectively hinged to the end part of the locating lever and the end part of the pressure lever, and the other end of the pressure lever extends out of the shell.
2. The arc extinguishing switch for a ring main unit according to claim 1, wherein a first connection post is connected to an end of the first contact exposed out of the mounting tube, a second connection post is provided on a side of the mounting tube opposite to the first connection post, and the second connection post is connected to the second contact through a wire.
3. The arc extinguishing switch for the ring main unit according to claim 2, wherein an accommodating cavity is formed in an inner wall of the mounting tube, the second connecting column penetrates into the accommodating cavity, and a wire between the second connecting column and the second contact is arranged in the accommodating cavity; the length of the accommodating cavity is not smaller than the sliding distance of the piston connecting column; the two ends of the piston connecting column are always positioned at the two sides of the accommodating cavity.
4. An arc extinguishing switch for a ring main unit according to claim 3, wherein the piston connecting column is provided with a containing hole, the containing hole is a blind hole, and the second contact is elastically connected into the containing hole through a spring; the spring always applies an outward pushing force to the second contact.
5. The arc extinguishing switch for a ring main unit according to claim 1, wherein the cross section of the piston connecting column is elliptical, and the cross section of the inner cavity of the mounting tube is identical to the cross section of the piston connecting column.
6. The arc suppressing switch for a ring main unit according to claim 1, wherein the piston driving rod comprises a piston head, a connecting rod and a driving block, the piston head is located in the mounting tube and moves in a piston manner, one end of the connecting rod is connected with the piston head, and the other end of the connecting rod extends out of the mounting tube and is connected with the driving block.
7. The arc extinguishing switch for a ring main unit according to claim 1, wherein a return spring is provided between the plunger and the housing, and the return spring always applies a force to the plunger in a direction in which the plunger is pushed out of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011543115.7A CN112635237B (en) | 2020-12-22 | 2020-12-22 | Arc extinguishing switch for ring main unit |
Applications Claiming Priority (1)
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| CN202011543115.7A CN112635237B (en) | 2020-12-22 | 2020-12-22 | Arc extinguishing switch for ring main unit |
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| CN112635237B true CN112635237B (en) | 2023-10-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206271610U (en) * | 2016-12-29 | 2017-06-20 | 四川蜀电成套设备有限公司 | A kind of high-pressure vacuum breaker |
| CN206711809U (en) * | 2017-03-14 | 2017-12-05 | 天津市天云龙电气设备有限公司 | A kind of direct-operated isolating switch easily monitored |
| CN208673984U (en) * | 2018-08-21 | 2019-03-29 | 天津润川电气设备科技有限公司 | Device for controlling on-off of indoor high-voltage vacuum circuit breaker by air pressure |
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2020
- 2020-12-22 CN CN202011543115.7A patent/CN112635237B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206271610U (en) * | 2016-12-29 | 2017-06-20 | 四川蜀电成套设备有限公司 | A kind of high-pressure vacuum breaker |
| CN206711809U (en) * | 2017-03-14 | 2017-12-05 | 天津市天云龙电气设备有限公司 | A kind of direct-operated isolating switch easily monitored |
| CN208673984U (en) * | 2018-08-21 | 2019-03-29 | 天津润川电气设备科技有限公司 | Device for controlling on-off of indoor high-voltage vacuum circuit breaker by air pressure |
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| CN112635237A (en) | 2021-04-09 |
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Address after: 264000 No.28 Haixing Road, hi tech Zone, Yantai City, Shandong Province Patentee after: DONGFANG ELECTRONICS Co.,Ltd. Patentee after: Yantai Dongfang Electronic and Electrical Co.,Ltd. Address before: 264000 No.28 Haixing Road, hi tech Zone, Yantai City, Shandong Province Patentee before: DONGFANG ELECTRONICS Co.,Ltd. Patentee before: YANTAI DONGFANG TECHNOLOGY ENVIRONMENTAL PROTECTION ENERGY SAVING CO.,LTD. |
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