CN112635237A - Arc extinguishing switch for ring main unit - Google Patents
Arc extinguishing switch for ring main unit Download PDFInfo
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- CN112635237A CN112635237A CN202011543115.7A CN202011543115A CN112635237A CN 112635237 A CN112635237 A CN 112635237A CN 202011543115 A CN202011543115 A CN 202011543115A CN 112635237 A CN112635237 A CN 112635237A
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- 238000009434 installation Methods 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
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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
- H01H33/666—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
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- 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 manner and extends out of the shell; the deflector rod is poked to one end of the piston driving rod, which extends out of the mounting pipe; the mounting pipe is provided with a first contact which is flush with the inner wall of the mounting pipe, 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 pipe; the installation pipe and the piston connecting column are made of ceramic materials, and the piston connecting column and the periphery of the piston driving rod are provided with sealing rings.
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 an electrical device which is formed by installing a group of high-voltage switch devices in a steel plate metal main unit body or manufacturing the high-voltage switch devices into an assembled interval ring main unit, and has the advantages of simple structure, small size, low price, capability of improving power supply parameters and performance, power supply safety and the like. The load switch can produce arc spark in the process of opening and closing, and the arc extinguishing treatment needs to be carried out on the high-voltage circuit switch in order to prevent the peripheral components from being damaged by the generated arc and prevent the switch from being closed to generate spark heating and melting or black switch contacts.
The most commonly used arc extinguishing device is a vacuum arc extinguishing chamber, also known as a vacuum switch tube, and the arc extinguishing device is mainly used for preventing the medium-high voltage circuit from generating electric arcs in the process of closing a power supply through excellent vacuum insulation in the vacuum arc extinguishing chamber. Although its small in size, convenient to use, owing to need evacuation processing, it is comparatively loaded down with trivial details to produce, and the vacuum nature degree in the use can not guarantee, if after vacuum interrupter produced tiny crack entering air, can not in time judge whether reliable and the closed operation of going on of it, very easily causes danger because of the arc spark that produces.
Therefore, an arc extinguishing switch for a ring main unit, which is convenient to produce and high in reliability, is needed, and the problem can be solved.
Disclosure of Invention
The invention aims to provide a new technical scheme of an arc extinguishing switch for a ring main unit.
According to a first aspect of the invention, an arc extinguishing switch for a ring main unit is provided, which comprises a shell, a shifting rod and a switch body, wherein the shifting rod is connected to the shell in a sliding manner and extends out of the shell, the switch body is installed in the shell, the switch body comprises an installation pipe, the installation pipe is fixed in the shell, the installation pipe is a pipe body with two open ends, a piston connecting column is connected in the installation pipe in a sliding manner, the piston connecting column is in clearance fit with the installation pipe, two ends of the installation pipe are connected with piston driving rods in a sliding manner, one end of each piston driving rod is abutted against the end of the corresponding piston connecting column, and the other end of each piston driving rod extends out of the installation pipe; the shifting rod is shifted to one end of the piston driving rod, which extends out of the mounting pipe; a first contact is arranged on the mounting pipe and is flush with the inner wall of the mounting pipe, a second contact is arranged on the piston connecting column, and the second contact is in contact conduction with the first contact when the piston connecting column slides to one end of the mounting pipe; the installation pipe and the piston connecting column are made of ceramic materials, and the piston connecting column and the periphery of the piston driving rod are provided with sealing rings.
Through the scheme, the contact between the piston driving rod and the piston connecting column is kept during installation, when the piston driving rod is pulled by the deflector 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 piston driving rod, so that the first contact and the second contact are in contact communication in a sideslip mode; the generation of the arc is suppressed or reduced due to the vacuum state in the mounting pipe and the narrow contact space between the first contact and the second contact. The device has a simple structure, and does not need to be vacuumized during production, so that the production difficulty is reduced, the production efficiency is improved, and the production cost is reduced; and because the piston connecting column belongs to passive removal, damage when arbitrary part leads to gas leakage, then the piston connecting column will not driven by atmospheric pressure to this device will not switch on, reliability and security when having improved this device use greatly.
Preferably, one end of the first contact exposed out of the mounting tube is connected with a first connecting column, one side of the mounting tube opposite to the first connecting column is provided with a second connecting column, and the second connecting column 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 pipe.
Preferably, the inner wall of the mounting tube is provided with an accommodating cavity, the second connecting column penetrates into the accommodating cavity, and a lead between the second connecting column and the second contact is arranged in the accommodating cavity; the length of the accommodating cavity is not less than the sliding distance of the piston connecting column; the two ends of the piston connecting column are always positioned on 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 pulling of wire to influence the slip of piston spliced pole.
Preferably, the plunger connecting column is provided with a containing hole which 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 the first contact under the elasticity of spring on, guarantees the compactness of connecting, avoids leading to the electric arc to produce because of there being the gap between first contact and the second contact.
Preferably, the cross section of the piston connecting column is oval, and the cross section of the inner cavity of the mounting tube is consistent with that of the piston connecting column.
Through this scheme, the oval-shaped sectional area not only can avoid the piston spliced pole at the intraductal rotation of installation, plays the effect of location, still helps the installation of sealing ring, avoids because of the sealed poor problem of effect that existence of edges and corners leads to.
Preferably, 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 mode, 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, the positioning rod is connected to the mounting tube in a sliding mode, and the positioning rod is used for positioning the on position and the off position of the piston connecting column.
Through the scheme, the arrangement of the positioning rod can ensure the reliability of the first contact and the second contact when being connected or disconnected, and the automatic closing or closing is avoided; and after the deflector rod is pulled, a certain vacuum space is generated between the piston head and the piston connecting column to verify whether the device is damaged, if not, the piston connecting column can act under the action of external atmospheric pressure after the positioning rod is pulled out, and if the piston connecting column is damaged, the piston connecting column can not act due to air entering, so that the safety of the device in use is further improved.
Preferably, a switch-on positioning hole and a switch-off positioning hole are formed in the piston connecting column, 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 the switch-on position or the switch-off position.
Through the scheme, the arrangement of the switch-on positioning hole and the switch-off positioning hole ensures that the device can be accurately switched on and 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 hinged to the end portion of the positioning rod and the end portion of the pressure rod respectively, 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 extracts the operation of switch-on locating hole or shutoff locating hole, outwards extract the depression bar, realize the location operation of locating lever, convenient operation.
Preferably, a return spring is provided between the pressing rod and the housing, and the return spring always applies a force to the pressing rod in a direction of pushing out the housing.
Through this scheme, only need press the depression bar when the operation and can realize the operation of piston connecting post, loosen the depression bar and can realize automatic positioning after the piston connecting post reachs the position, further made things convenient for the operation.
According to one embodiment of the present disclosure, the device has the advantages of simple and ingenious structure, convenient use, vacuum arc extinction, great reduction of space generated by electric arc, and good arc extinction effect;
the production process does not need vacuum pumping treatment, so that the production efficiency is greatly improved, the production difficulty is reduced, and the production cost is favorably reduced;
if the device is damaged and leaks air, the normal switching-on and switching-off functions can be lost, and the possibility of switching on under the condition of air is avoided, so that the safety in use is greatly improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, 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 sectional view of a-a direction of a switch body of the arc extinguishing switch for the ring main unit in fig. 1.
Fig. 3 is a schematic sectional view taken along the direction B-B in fig. 2.
Fig. 4 is a schematic cross-sectional view taken along line C-C in fig. 2.
Fig. 5 is a schematic structural view of a piston connection post in the switch body of fig. 2.
Fig. 6 is a schematic view of the structure of the mounting pipe in the switch body of fig. 2.
Fig. 7 is a schematic view of the piston driving rod of the switch lever of fig. 2.
Fig. 8 is a schematic view of a connection structure of the positioning rod and the pressure 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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required 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 shift lever 2000 and a switch body 1000, the shift lever 2000 is slidably connected to the housing 3000 and extends out of the housing 3000, the switch body 1000 is installed in the housing 3000, the switch body 1000 includes an installation tube 1100, the installation tube 1100 is fixed in the housing 3000, the installation tube 1100 is a tube body with openings at two ends, a piston connection column 1200 is slidably connected in the installation tube 1100, the piston connection column 1200 is in clearance fit with the installation tube 1100, piston driving rods 1300 are slidably connected at two ends of the installation tube 1100, one end of each piston driving rod 1300 abuts against an end of the corresponding piston connection column 1200, and the other end of each piston driving rod 1300 extends out of the installation tube 1100; the shifting lever 2000 shifts to one end of the piston driving rod 1300 extending out of the installation tube 1100; a first contact 1110 is arranged on the installation tube 1100, the first contact 1110 is flush with the inner wall of the installation 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 installation tube 1100; the mounting tube 1100 and the piston connection column 1200 are made of ceramic materials, and sealing rings (not shown in the figure) are arranged on the peripheries of the piston connection column 1200 and the piston drive rod 1300.
According to the scheme of the embodiment, the contact between the piston driving rod 1300 and the piston connecting column 1200 is kept during installation, when the deflector rod 2000 stirs the piston driving rod 1300, due to the piston seal between the piston connecting column 1200 and the installation pipe 1100, along with the pulling of the piston driving rod 1300, the space between the piston driving rod 1300 and the piston connecting column 1200 is enlarged, the space is in a vacuum state, and due to the action of external air pressure, the piston connecting column 1200 can move towards the direction of the stirred piston driving rod 1300, so that the first contact 1110 is in contact communication with the second contact 1210 in a sideslip mode; the generation of the arc is suppressed or reduced due to the vacuum state of the piston driving rod 1300 and the piston connecting rod 1200 after moving and the narrow contact space between the first contact 1110 and the second contact 1210.
The device has a simple structure, and does not need to be vacuumized during production, so that the production difficulty is reduced, the production efficiency is improved, and the production cost is reduced; and because piston connecting column 1200 belongs to passive removal, damage when any part leads to gas leakage, then the air can get into installation pipe 1100 when pulling piston actuating lever 1300, and piston connecting column 1200 will not driven by atmospheric pressure to this device will not switch on, reliability and security when having improved this device use greatly.
In this embodiment or other embodiments, a first connection post 1111 is connected to one end of the first contact 1110 exposed out of the mounting tube 1100, a second connection post 1120 is disposed at 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 installation tube 1100 is ensured.
The first connection post 1111 and the second connection post 1120 are, for example, bolts, and nuts are screwed on the bolts to connect the wires, thereby externally connecting 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 an accommodating cavity 1121, the second connecting pillar 1120 penetrates into the accommodating cavity 1121, and a lead 1213 between the second connecting pillar 1120 and the second contact 1210 is disposed in the accommodating cavity 1121; the length of the accommodating 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 on the two sides of the accommodating cavity 1121, and the lead 1213 is arranged in the accommodating cavity 1121 so as to ensure the normal movement of the piston connecting column 1200, avoid the influence of the dragging of the lead 1213 on the sliding of the piston connecting column 1200, and improve the reliability of the device during use.
In this embodiment or other embodiments, the plunger connecting post 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 that the connection tightness is ensured, and the generation of an arc caused by a gap between the first contact 1110 and the second contact 1210 is avoided.
In this embodiment or other embodiments, the cross section of the piston connecting column 1200 is oval, the cross sectional shape of the inner cavity of the mounting tube 1100 is the same as that of the piston connecting column 1200, the oval sectional area can prevent the piston connecting column 1200 from rotating in the mounting tube, so that the positioning effect is achieved, the mounting of the sealing ring is facilitated, the smooth outer surface 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 and corners is avoided.
In this or other embodiments, the piston driving rod 1300 includes a piston head 1310, a connecting rod 1320, and a driving block 1330, the piston head 1310 is disposed 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 driving block 1330. A sealing ring is disposed on the piston head 1310 to provide a sealing connection between the piston head 1310 and the piston on the inner wall of the mounting tube 1100.
The installation tube 1100 in this embodiment has a piston hole 1102 at one end through which a connecting rod 1320 extends out of the installation tube 1100 and is slidably connected with the piston hole 1102, so that the piston driving rod 1300 can move along the axis of the installation tube 1100, and a plurality of vent holes 1101 are arranged at the periphery of the piston hole 1102 to ensure that the piston driving rod 1300 does not become labourious due to compressed air between the piston head 1310 and the piston hole 1102 during the movement 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 for positioning the on position and the off position of the piston connecting column 1200. The positioning rod 1410 is sleeved with a sealing ring to prevent the positioning rod 1410 from generating air leakage.
The arrangement of the positioning rod can ensure the reliability of the first contact 1110 and the second contact 1210 when being switched on or switched off, and avoid self-closing or self-closing; after the shift lever 2000 is shifted, a certain vacuum space is generated between the piston head 1310 and the piston connecting column 1200 to verify whether the device is damaged, and if the device is not damaged, 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 is communicated with the second contact 1210; if the device is damaged, the pressure difference between the two sides of the piston connecting column 1200 is reduced due to the entering of air, so that the device cannot act, the safety of the device in use is further improved, and the electric arc generated by air leakage is avoided, so that the danger is further caused.
In this embodiment or other embodiments, the piston connection column 1200 is provided with an on positioning hole 1222 and an off positioning hole 1221, and the positioning rod 1410 is inserted into the on positioning hole 1222 or the off positioning hole 1221 to position the piston connection column 1200 to the on position or the off position. The provision of the on positioning hole 1222 and the off positioning hole 1221 ensures that the present apparatus can be turned on and off accurately.
In this or other embodiments, the positioning rod 1410 is connected to the pressing rod 1420 through a pry bar 1430, the pry bar 1430 is hinged to the housing 3000 at the middle, two ends of the pry bar 1430 are respectively hinged to an end of the positioning rod 1410 and an end of the pressing rod 1420, and the other end of the pressing rod 1420 extends out of the housing 3000. The operation of pulling out the positioning rod 1410 to connect the positioning hole 1222 or cut off the positioning hole 1221 can be realized by pressing the pressing rod 1420, and the operation of inserting and positioning the positioning rod 1410 is realized by pulling out the pressing rod 1420 outwards, which is convenient for operation.
In this embodiment, the positioning rod 1410 and the pressing rod 1420 have waist-shaped holes at their ends, and the pry bar 1430 is hinged to the waist-shaped holes, so that the pry bar 1430 can rotate to change the angle with the positioning rod 1410 and the pressing rod 1420, and thus a certain displacement in the horizontal direction can be generated, and the waist-shaped holes can be adapted to the change in the horizontal direction.
In this embodiment or other embodiments, a return spring 1421 is disposed between the pressing rod 1420 and the housing 3000, the return spring 1421 always applies a force to the pressing rod 1420 in a direction of pushing out the housing 3000, the pressing rod 1420 is only pressed during operation to achieve the operation of the plunger connecting rod 1200, and the pressing rod 1420 is released after the plunger connecting rod 1200 reaches a position to achieve automatic positioning, which further facilitates the operation.
The driving lever 2000 in this embodiment is provided with two driving plates (not shown in the figure), the two driving plates are respectively matched with the two driving blocks 1330, and the driving plates are arranged between the driving blocks 1330 and the installation pipe 1100, so that the driving blocks 1330 can only be driven towards the direction far away from one side of the installation pipe 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 the moment, the first contact 1110 and the second contact 1210 are in an off state, when the device needs to be connected, the driving rod 2000 is pushed upwards, the upper driving piece pushes the upper piston driving rod 1300 to move upwards, the piston connecting column 1200 does not act as the positioning rod 1410 is inserted into the off positioning hole 1221, if the device is in a perfect state, the position between the piston connecting column 1200 and the piston head 1310 is in a vacuum state, the pressing rod 1420 is pressed at the moment, the positioning rod 1410 is pulled out of 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 in contact conduction with the first contact 1110; the bottom piston drive rod 1300 will also move upward due to atmospheric pressure; when the pressing lever 1420 is released, the positioning rod 1410 is inserted into the positioning hole 1222 by the urging force of the return spring 1421.
If the apparatus is in a leak state, the piston connecting column 1200 cannot be driven by atmospheric pressure due to the presence of air between the piston connecting column 1200 and the piston head 1310, and the connection operation is not performed.
If the device needs to be turned off, the driving lever 2000 is moved downwards, the lower driving plate is moved downwards, the lower driving block 1330 is moved downwards, a vacuum cavity is formed between the piston head 1310 and the piston connecting column 1200, the pressing rod 1420 is pressed downwards, the positioning rod 1410 is pulled out to be communicated with the positioning hole 1222, and the piston connecting column 1200 moves downwards, so that the first contact 1110 and the second contact 1210 are turned off.
According to the embodiment, the device has the advantages of simple and ingenious structure and convenience in use, vacuum arc extinguishing can be realized, the space generated by electric arc is greatly reduced, and the arc extinguishing effect is good;
the production process does not need vacuum pumping treatment, so that the production efficiency is greatly improved, the production difficulty is reduced, and the production cost is favorably reduced;
if the device is damaged and leaks air, the normal switching-on and switching-off functions can be lost, and the possibility of switching on under the condition of air is avoided, so that the safety in use is greatly improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 (10)
1. An arc extinguishing switch for a ring main unit comprises a shell, a driving lever and a switch body, wherein the driving lever is connected to the shell in a sliding mode and extends out of the shell, and the switch body is installed in the shell; the shifting rod is shifted to one end of the piston driving rod, which extends out of the mounting pipe; a first contact is arranged on the mounting pipe and is flush with the inner wall of the mounting pipe, a second contact is arranged on the piston connecting column, and the second contact is in contact conduction with the first contact when the piston connecting column slides to one end of the mounting pipe; the installation pipe and the piston connecting column are made of ceramic materials, and the piston connecting column and the periphery of the piston driving rod are provided with sealing rings.
2. The arc extinguishing switch for the ring main unit according to claim 1, wherein one end of the first contact exposed out of the mounting tube is connected with a first connecting column, one side of the mounting tube opposite to the first connecting column is provided with a second connecting column, and the second connecting column 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 conducting wire between the second connecting column and the second contact is arranged in the accommodating cavity; the length of the accommodating cavity is not less than the sliding distance of the piston connecting column; the two ends of the piston connecting column are always positioned on the two sides of the accommodating cavity.
4. The arc extinguishing switch for the ring main unit according to claim 3, wherein the plunger 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. An 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 extinguishing switch for the ring main unit as claimed in 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 the ring main unit according to claim 1, wherein a positioning rod is radially arranged on the mounting tube, the positioning rod 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.
8. An arc extinguishing switch for a ring main unit according to claim 7, wherein the piston connection post is provided with an on positioning hole and an off positioning hole, and the positioning rod is inserted into the on positioning hole or the off positioning hole to position the piston connection post to the on position or the off position.
9. The arc extinguishing switch for the ring main unit as claimed in claim 8, wherein the positioning rod is connected to a pressing rod through a pry bar, the middle of the pry bar is hinged to the housing, two ends of the pry bar are respectively hinged to an end of the positioning rod and an end of the pressing rod, and the other end of the pressing rod extends out of the housing.
10. The arc extinguishing switch for the ring main unit according to claim 9, wherein a return spring is provided between the pressing lever and the housing, and the return spring always applies a force to the pressing lever in a direction of pushing out 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)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011543115.7A CN112635237B (en) | 2020-12-22 | 2020-12-22 | Arc extinguishing switch for ring main unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112635237A true CN112635237A (en) | 2021-04-09 |
| CN112635237B CN112635237B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011543115.7A Active CN112635237B (en) | 2020-12-22 | 2020-12-22 | Arc extinguishing switch for ring main unit |
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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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| Publication number | Publication date |
|---|---|
| CN112635237B (en) | 2023-10-24 |
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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. |