CN110854686B - Lead structure of charged indicator for closed switch equipment - Google Patents
Lead structure of charged indicator for closed switch equipment Download PDFInfo
- Publication number
- CN110854686B CN110854686B CN201911113797.5A CN201911113797A CN110854686B CN 110854686 B CN110854686 B CN 110854686B CN 201911113797 A CN201911113797 A CN 201911113797A CN 110854686 B CN110854686 B CN 110854686B
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- CN
- China
- Prior art keywords
- terminal
- indicator
- sleeve
- lead terminal
- crimping
- 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.)
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Links
- 238000002788 crimping Methods 0.000 claims abstract description 72
- 230000006698 induction Effects 0.000 claims abstract description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 50
- 238000000034 method Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B15/00—Supervisory desks or panels for centralised control or display
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
Abstract
The invention relates to a lead structure of a live indicator of a closed switch device. The live indicator lead structure of the enclosed switchgear includes: the gas tank comprises a gas tank, an insulating sleeve and an indicator lead terminal, wherein the insulating sleeve is fixed on the wall of the gas tank; the insulating sleeve comprises a sleeve main body, an induction ring is arranged in the sleeve main body, a wire outlet terminal is arranged on the outer peripheral surface of the sleeve main body, and the wire outlet terminal is in conductive connection with the induction ring. The indicator lead terminal is connected with a charged indicator lead wire and is used for being connected to a wire outlet terminal; and a lead terminal crimping piece is fixed on the air box and is pressed on the lead terminal of the indicator so as to keep the lead terminal of the indicator in a connected state with the outlet terminal. The lead terminal crimping piece is pressed on the lead terminal of the indicator, so that the lead terminal of the indicator and the wire outlet terminal can be kept in a connected state, and the problem that a wire of the charged indicator is easy to wind is solved.
Description
Technical Field
The invention relates to a lead structure of a live indicator of a closed switch device.
Background
The C-GIS metal enclosed switchgear has the characteristics of small volume, compact size, no maintenance, high reliability, good sealing and insulating properties, no influence of external environmental factors and the like in the medium-voltage field, thereby being widely applied to power distribution of a power system and construction of a high-speed rail power distribution station. The primary loop of the C-GIS metal closed switch equipment is usually communicated with the inside and the outside of the gas tank through an insulating sleeve, and whether the primary loop is electrified or not is usually judged by an electrified indicator connected with the insulating sleeve, so that safety guarantee is provided for operators.
An induction ring is arranged in the main body of the existing insulating sleeve, and a wire outlet terminal is conductively connected to the induction ring; the insulating sleeve assembly further comprises an indicator lead terminal matched with the outlet terminal, and the indicator lead terminal is used for being in conductive connection with the charged indicator lead.
The lead terminal of the prior art indicator is screw-fitted to the outlet terminal by a screw structure, such as the structure disclosed in chinese patent publication nos. CN206506218U, CN 204045936U. However, when the indicator lead terminal is assembled, the indicator lead terminal needs to be rotated to be connected to the outlet terminal through a screw structure, and the charged indicator lead is easily wound, which is not favorable for wiring.
Disclosure of Invention
The invention aims to provide a lead structure of a live indicator for closed switch equipment, which aims to solve the problems that in the prior art, a lead terminal of a live indicator is connected with a lead-out terminal through threads, the lead of the lead terminal of the indicator is easy to wind, and the lead is not beneficial to wiring.
In order to solve the problems, the technical scheme of the lead structure of the charged indicator of the closed switch device is as follows:
a live indicator lead configuration for enclosing a switchgear comprising: the gas tank comprises a gas tank, an insulating sleeve and an indicator lead terminal, wherein the insulating sleeve is fixed on the wall of the gas tank;
the insulating sleeve comprises a sleeve main body, wherein an induction ring is arranged in the sleeve main body, and an outlet terminal is arranged on the peripheral surface of the sleeve main body and is in conductive connection with the induction ring; the indicator lead terminal is connected with a charged indicator lead wire and is used for being connected to a wire outlet terminal;
the outgoing line terminal and the indicator lead terminal are plug terminals and are used for being matched and conducted in a plug mode;
and a lead terminal crimping piece is fixed on the air box and is pressed on the lead terminal of the indicator so as to keep the lead terminal of the indicator in a connected state with the outlet terminal.
Compared with the prior art, the wire outgoing terminal and the indicator lead terminal are connected in an inserting mode, the indicator lead terminal and the wire outgoing terminal are kept in a connected state by pressing the lead terminal pressing piece on the indicator lead terminal, the indicator lead terminal and the wire outgoing terminal can be connected in an inserting mode without rotating the indicator lead terminal, and the problem that the wire of the electrified indicator is easy to wind is solved.
As a preferred technical scheme, a crimping step is arranged on the peripheral surface of the insulating sleeve, the insulating sleeve is fixed on the wall of the air tank through a sleeve pressing plate crimped on the crimping step, and a pressing plate fixing seat is arranged on the inner side of the wall of the air tank;
and the lead terminal crimping piece is fixed on the sleeve pressing plate.
Has the advantages that: the peripheral surface of the insulating sleeve is provided with the crimping step, so that the crimping is more stable and firmer; the pressure plate fixing seat is arranged on the inner side of the wall of the air box, so that the sleeve pressure plate can be fixed and can be connected with the lead terminal crimping piece, and the lead terminal crimping piece can be conveniently fixed.
As a preferable technical solution, the lead terminal crimping member is a terminal pressing plate, and the terminal pressing plate includes a fixing plate portion and a crimping plate portion;
the fixing plate part is fixed on one side of the sleeve pressing plate back to the compression step;
and a crimping plate portion arranged perpendicularly to the fixing plate portion for crimping to an end face of the indicator lead terminal on a side facing away from the outlet terminal.
Has the advantages that: the lead terminal crimping piece adopts the form of terminal clamp plate, simple structure, and crimping board portion can be crimped to the terminal surface of indicator lead terminal one side of being dorsad outgoing line terminal, realizes the crimping to the indicator lead terminal, and sets up the fixed plate portion and can fix the terminal clamp plate to the sleeve pipe clamp plate more easily, connects conveniently.
As a preferred technical scheme, a threaded hole is formed in the pressure plate fixing seat;
and the terminal pressing plate and the sleeve pressing plate are fixed on the pressing plate fixing seat through screws penetrating through the terminal pressing plate and the sleeve pressing plate.
Has the advantages that: the lead terminal crimping piece and the sleeve pressing plate can be simultaneously fixed on the pressing plate fixing seat, and the structure is simplified.
As a preferred technical solution, the terminal pressing plate includes a U-shaped bend;
the U-shaped bent portion has a mouth edge on one side in the opening width direction connected to the fixing plate portion and the other side extending toward the indicator lead terminal to form the pressure bonding plate portion.
Has the advantages that: the U-shaped bend can provide a certain crimping elasticity to the lead terminal crimping member.
As a preferred technical scheme, the wall of the air box comprises a sleeve fixing wall, and the sleeve fixing wall is used for fixing the insulating sleeve;
the crimping plate portion is connected to a support plate supported on a side wall of the gas box adjacent the sleeve retaining wall.
Has the advantages that: rely on gas tank wall and backup pad to carry on spacingly to the crimping board part, prevent that the terminal from deviating from, the backup pad makes the crimping more reliable.
As a preferred technical scheme, the supporting plate is an L-shaped structure and comprises a supporting plate part and a connecting plate part;
the supporting plate part is used for being attached to the side wall of the air box adjacent to the sleeve fixing wall;
and a connecting plate portion connected between the support plate portion and the crimping plate portion of the terminal pressing plate.
Has the advantages that: the supporting plate is partially attached to the side wall of the air box adjacent to the sleeve fixing wall to form stable support, and reliability is guaranteed. With the structure in which the terminal holding plate is fixed by only one fixing screw, it is also possible to prevent the lead terminal crimping piece from rotating around the fixing screw by utilizing the surface contact of the support plate portion and the gas tank wall.
Drawings
FIG. 1 is a schematic view of an insulating sleeve assembly;
FIG. 2 is a front view of an insulating sleeve;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a top view of the insulating sleeve and pressure plate;
fig. 5 is a plug-in structure view of the outlet terminal and the indicator lead terminal.
Description of reference numerals: 1-insulating sleeve, 2-induction ring, 3-air box, 4-sleeve pressure plate, 5-outgoing line terminal, 6-indicator lead terminal, 7-lead terminal crimping piece, 11-crimping step, 31-sleeve fixing wall, 32-pressure plate fixing seat, 71-fixing plate part, 72-crimping plate part and 73-supporting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present application are described in further detail below with reference to examples.
The invention provides a specific embodiment of a lead structure of a live indicator of a closed switch device, which comprises the following steps:
as shown in fig. 1, the charged indicator lead wire structure of the enclosed switchgear includes an air tank 3, an insulating sleeve 1, and an indicator lead terminal 6, an air tank wall of the air tank 3 includes a sleeve fixing wall 31, and the insulating sleeve 1 is fixed on the sleeve fixing wall 31.
The insulating sleeve 1 comprises a sleeve main body, an induction ring 2 is arranged in the sleeve main body, as shown in fig. 2, an outlet terminal 5 is arranged on the outer circumferential surface of the sleeve main body, the appearance structure of the outlet terminal 5 is as shown in fig. 3, and the outlet terminal 5 is in conductive connection with the induction ring 2. The outgoing line terminal 5 is connected with an indicator lead terminal 6, and the outgoing line terminal 5 and the indicator lead terminal 6 are plug terminals for being adapted and conducted in a plug mode, and the plug mode is shown in fig. 5. A charged indicator lead wire is connected to the indicator lead terminal 6 for connection to a charged indicator.
The insulation sleeve 1 is provided with a crimping step 11 on the outer peripheral surface thereof, and the insulation sleeve 1 is fixed to the sleeve fixing wall 31 by the sleeve presser 4 crimped on the crimping step 11, as shown in fig. 4. The inner side of the sleeve fixing wall 31 is provided with a pressing plate fixing seat 32, and the pressing plate fixing seat 32 is formed by fixing columns fixed on the inner side of the gas tank wall.
The live indicator lead wire structure of the closed switchgear further comprises a lead terminal crimping member 7, the lead terminal crimping member 7 is a terminal pressing plate, and the lead terminal crimping member 7 is used for pressing the indicator lead terminals 6 connected with the respective phase insulating sleeves. The terminal press plate includes a fixing plate portion 71 and a crimping plate portion 72, and an L-shaped support plate 73 is attached to the crimping plate portion 72. The fixing plate portion 71 is fixed on the side of the sleeve pressing plate 4 facing away from the crimping table, and the fixing plate portion 71 and the sleeve pressing plate 4 are fixed on the pressing plate fixing seat 32 through screws penetrating through the fixing plate portion and the sleeve pressing plate 4. The crimping plate portion 72 is arranged perpendicularly to the fixing plate portion 71 for crimping onto an end face of the indicator lead terminal 6 on a side facing away from the outlet terminal 5. The terminal holding plate includes a U-shaped bend, and as shown in fig. 1, a mouth edge on one side in the opening width direction of the U-shaped bend is connected to the fixing plate portion 71, and the other side extends toward the indicator lead terminal 6 to form the crimping plate portion 72. After the lead terminal crimping member 7 is fixed to the sleeve presser plate 4, it is pressed against the indicator lead terminal 6 to keep the indicator lead terminal 6 in a connected state with the outlet terminal 5.
The support plate 73 includes a support plate portion for abutting against a side wall of the air box adjacent to the sleeve fixing wall, and a connecting portion connected between the support plate portion and the crimping plate portion 72 of the terminal press plate.
During installation, the lower end of the insulating sleeve 1 penetrates through the wall of the air box, a round hole is formed in the middle of the sleeve pressing plate 4 and is sleeved on the insulating sleeve 1, the sleeve pressing plate 4 is pressed on the crimping step 11, the indicator lead terminal 6 and the outgoing line terminal 5 are connected in an inserting mode, an opening is formed between the round hole of the sleeve pressing plate 4 and the edge of the sleeve pressing plate 4 and used for enabling the outgoing line terminal 5 to pass through, then the lead terminal crimping piece 7 and the indicator lead terminal 6 are fixed on the pressing plate fixing seat 32 together through screws, at the moment, the crimping plate part 72 is crimped on the end face of the indicator lead terminal 6, and the support plate part of the support plate 73 is attached to the side wall, adjacent to the sleeve fixing.
Embodiment 2 of a lead structure of a live indicator of a closed switchgear provided by the present invention;
the present embodiment is different from embodiment 1 in that, as shown in fig. 4, in embodiment 1, the lead terminal crimping member 7 is used for pressing the indicator lead terminal 6 connected to each phase of the insulating sleeve, and in this embodiment, three pieces of the lead terminal crimping member 7 are provided, each of the lead terminal crimping members 7 corresponding to one phase of the insulating sleeve, respectively.
Embodiment 3 of the charged indicator lead wire structure of the enclosed switchgear according to the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the lead terminal crimping member 7 includes the support plate 73 of the L-shaped configuration, and the support plate 73 of the L-shaped configuration includes the support plate portion and the connecting plate portion, and in this embodiment, the lead terminal crimping member 7 is not provided with the support plate 73 of the L-shape, and the indicator lead terminal 6 is crimped by means of only the crimping plate portion 72.
the present embodiment is different from embodiment 1 in that in embodiment 1, the lead terminal crimping member 7 includes the support plate of the L-shaped structure which in turn includes the support plate portion and the connection plate portion, the support plate portion of the L-shaped support plate 73 included in the lead terminal crimping member 7 is not provided in the present embodiment, and only the connection plate portion in embodiment 1 is connected to the crimping plate portion 72.
this embodiment is different from embodiment 1 in that, in embodiment 1, the lead terminal crimping member 7 includes a U-shaped bend, and in this embodiment, the lead terminal crimping member 7 is provided in an L-shape.
Example 6 of a charged indicator lead structure of a closed switchgear according to the present invention:
this embodiment is different from embodiment 5 in that in embodiment 1, the lead terminal crimping member 7 includes a U-shaped bend, and in this embodiment, the fixing plate portion 71 and the crimping plate portion 72 of the lead terminal crimping member 7 described in embodiment 1 are set in an L-shape without adopting the U-shaped bend.
In other embodiments, the lead terminal crimping member 7 may not be provided, but a support block may be provided on the side wall of the air box, one end of the support block being pressed against the end face of the indicator lead terminal 6.
Example 7 of a charged indicator lead structure of a closed switchgear according to the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the lead terminal crimping member 7 includes a fixing plate portion 71 and a crimping plate portion 72, the fixing plate portion 71 and the sleeve pressing plate 4 are fixed on the pressing plate fixing base 32 by a screw penetrating through both, in the present embodiment, two screw holes are provided on a fixing column of the pressing plate fixing base 32, and the fixing plate portion 71 and the sleeve pressing plate 4 of the lead terminal crimping member 7 can be respectively fixed on the pressing plate fixing base 32.
Embodiment 8 of the charged indicator lead wire structure of the enclosed switchgear provided by the present invention:
the difference between this embodiment and embodiment 1 is that in embodiment 1, the fixing column on the pressing plate fixing seat 32 is provided as another form than a cylinder, for example, an L-shaped bending plate welded on the gas tank wall, one side plate body of the L-shaped bending plate is used for supporting the sleeve pressing plate 4, and the other side plate body is fixed to the gas tank wall in a form perpendicular to the gas tank wall.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (5)
1. Charged indicator lead structure for a closed switching device, comprising: the gas tank comprises a gas tank, an insulating sleeve and an indicator lead terminal, wherein the insulating sleeve is fixed on the wall of the gas tank;
the insulating sleeve comprises a sleeve main body, wherein an induction ring is arranged in the sleeve main body, and an outlet terminal is arranged on the peripheral surface of the sleeve main body and is in conductive connection with the induction ring;
the indicator lead terminal is connected with a charged indicator lead wire and is used for being connected to a wire outlet terminal;
the method is characterized in that:
the outgoing line terminal and the indicator lead terminal are plug terminals and are used for being matched and conducted in a plug mode;
a lead terminal crimping piece is fixed on the air box and is pressed on the lead terminal of the indicator so as to keep the lead terminal of the indicator in a connected state with the outlet terminal; the outer peripheral surface of the insulating sleeve is provided with a crimping step, the insulating sleeve is fixed on the wall of the gas tank through a sleeve pressing plate which is crimped on the crimping step, and the inner side of the wall of the gas tank is provided with a pressing plate fixing seat;
the lead terminal crimping piece is fixed on the sleeve pressing plate;
the lead terminal crimping piece is a terminal pressing plate, and the terminal pressing plate comprises a fixing plate part and a crimping plate part;
the fixing plate part is fixed on one side of the sleeve pressing plate back to the compression step;
and a crimping plate portion arranged perpendicularly to the fixing plate portion for crimping to an end face of the indicator lead terminal on a side facing away from the outlet terminal.
2. The live indicator lead structure of a closed switchgear as claimed in claim 1, wherein the pressure plate fixing seat is provided with a threaded hole;
and the terminal pressing plate and the sleeve pressing plate are fixed on the pressing plate fixing seat through screws penetrating through the terminal pressing plate and the sleeve pressing plate.
3. The live indicator lead structure of enclosed switchgear as claimed in claim 1, wherein said terminal pressure plate comprises a U-shaped bend;
the U-shaped bent portion has a mouth edge on one side in the opening width direction connected to the fixing plate portion and the other side extending toward the indicator lead terminal to form the pressure bonding plate portion.
4. Charged indicator lead structure of a closed switching device according to claim 1 or 2 or 3, characterized in that the gas box wall comprises a bushing fixing wall for the fixing of an insulating bushing;
the crimping plate portion is connected to a support plate supported on a side wall of the gas box adjacent the sleeve retaining wall.
5. The live indicator lead structure of a closed switchgear device according to claim 4, characterized in that the support plate is an L-shaped structure comprising a support plate portion and a connection plate portion;
the supporting plate part is used for being attached to the side wall of the air box adjacent to the sleeve fixing wall;
and a connecting plate portion connected between the support plate portion and the crimping plate portion of the terminal pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113797.5A CN110854686B (en) | 2019-11-14 | 2019-11-14 | Lead structure of charged indicator for closed switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113797.5A CN110854686B (en) | 2019-11-14 | 2019-11-14 | Lead structure of charged indicator for closed switch equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110854686A CN110854686A (en) | 2020-02-28 |
| CN110854686B true CN110854686B (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911113797.5A Active CN110854686B (en) | 2019-11-14 | 2019-11-14 | Lead structure of charged indicator for closed switch equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN110854686B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201681754U (en) * | 2010-04-30 | 2010-12-22 | 深圳市惠程电气股份有限公司 | Epoxy insulation sleeve |
| CN207834734U (en) * | 2018-02-07 | 2018-09-07 | 国网福建省电力有限公司 | A kind of plug-in type indicator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201708505U (en) * | 2010-07-06 | 2011-01-12 | 沈阳华利能源设备制造有限公司 | Inner cone bus insulating sleeve |
| CN202840418U (en) * | 2012-07-20 | 2013-03-27 | 沈阳世杰电器有限公司 | Embedded type insulated casing tube |
| CN103682862B (en) * | 2013-12-25 | 2016-08-24 | 航天科工深圳（集团）有限公司 | A kind of ring main unit cable connector |
| CN204029525U (en) * | 2014-07-06 | 2014-12-17 | 深圳市罗庚电气有限公司 | A kind of sleeve pipe fixation clip for transformer |
-
2019
- 2019-11-14 CN CN201911113797.5A patent/CN110854686B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201681754U (en) * | 2010-04-30 | 2010-12-22 | 深圳市惠程电气股份有限公司 | Epoxy insulation sleeve |
| CN207834734U (en) * | 2018-02-07 | 2018-09-07 | 国网福建省电力有限公司 | A kind of plug-in type indicator |
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| Publication number | Publication date |
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| CN110854686A (en) | 2020-02-28 |
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