CN104409271A - Load switch and break switch with same - Google Patents
Load switch and break switch with same Download PDFInfo
- Publication number
- CN104409271A CN104409271A CN201410704658.0A CN201410704658A CN104409271A CN 104409271 A CN104409271 A CN 104409271A CN 201410704658 A CN201410704658 A CN 201410704658A CN 104409271 A CN104409271 A CN 104409271A
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- China
- Prior art keywords
- moving contact
- load
- load switch
- insulation
- sleeve
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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
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
-
- 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
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a load switch and a break switch with the same. The load switch and the break switch aim to solve problems that break switches applied to bidirectional ring network equipment in the prior art are mostly turned on from single sides, each two independent break switches among the types of break switches of the bidirectional ring network equipment need to be combined with each other to be bidirectionally turned on, the types of break switches of the bidirectional ring network equipment are arranged in specific insulating boxes in vacuum bubble arc extinguishing chambers, each two corresponding independent break switches are large in occupied volume and complicated in mounting when combined with each other, and severe accidents can occur when each two corresponding independent break switches are simultaneously turned on. The technical scheme includes that the load switch comprises an insulated switch bracket body, two connecting copper bars, two wire inlet copper bars, two wire outlet copper bars, two static contactors, a spindle, an outer insulating movable contactor sleeve, an inner metal movable contactor sleeve, a movable contactor, an insulating connecting sleeve, a shifting fork and a metal spacer bush. The invention further discloses the break switch of bidirectional automatic switching ring network equipment. The break switch comprises three load switches which are serially connected with one another.
Description
Technical field
The present invention relates to a kind of load switch, also relate to a kind of on-load switch of the two-way automatic switching looped network equipment that is in series by three load switches.
Background technology
At present, the load switch on market is all one-sidedly to connect mostly; And during in order to two-way connection will be realized, two independent load switches all to be adopted to combine.This structure exists that to take volume large, and install complicated, technique and the part comparison of production are many, and consistency is not high, and there is the generation causing serious accident that two independent load switches close simultaneously.
Meanwhile, at present, being applied in the on-load switch in bidirectional loop network equipment, is also all one-sided connection mostly, and during in order to realize two-way connection, and the on-load switch in this type bidirectional loop network equipment adopts two independent on-load switches to combine; Because the on-load switch in this type bidirectional loop network equipment is all arranged in the insulation booth of specifying in vacuum bubbles arc control device, adopt the on-load switch combination that two independent, it is large that this structure existence takies volume, install complicated, technique and the part comparison of production are many, consistency is not high, and there is the generation causing serious accident that two independent on-load switches close simultaneously.
Summary of the invention
Technical problem to be solved by this invention is: for the on-load switch be applied in prior art in bidirectional loop network equipment, also be all one-sided connection mostly, and during in order to realize two-way connection, the on-load switch in this type bidirectional loop network equipment adopts two independent on-load switches to combine; Because the on-load switch in this type bidirectional loop network equipment is all arranged in the insulation booth of specifying in vacuum bubbles arc control device, adopt the on-load switch combination that two independent, it is large that this structure existence takies volume, install complicated, technique and the part comparison of production are many, consistency is not high, and there is the problem causing serious accident to occur that two independent on-load switches close simultaneously.
Design philosophy of the present invention is: adopt structure identical three independently load switch tandem compound form to meet the functional requirement of this type of switch cubicle in bidirectional loop network equipment.
The on-load switch that the object of this invention is to provide a kind of load switch and be made up of load switch; This on-load switch is, with mould, isolation material is integrally formed as insulated switch rack body, and by copper bar, the electric-conductors such as copper contact and insulated switch rack body are installed together, volume is little, and security performance is high, having stable behavior, production and processing is easy, and can not there is the misoperation of simultaneously closing both sides.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is:
A kind of load switch, comprises insulated switch rack body; Described insulated switch rack body upper end is symmetrically arranged with two and connects copper installation face, and insulated switch rack body lower end is symmetrically arranged with two outlet copper bar installed surfaces;
Two connect copper bar; Described two connection copper bars are fixedly installed on two connection copper installation faces of insulated switch rack body upper end;
Two inlet wire copper bars; Described two inlet wire copper bar symmetries are fixed on and connect on copper bar;
Two outlet copper bars; Described two outlet copper bars are separately fixed on two outlet copper bar installed surfaces of insulated switch rack body lower end;
Two fixed contacts; Described two fixed contacts are the symmetrical lower end being fixed on insulated switch rack body respectively, and two fixed contacts are connected with described two outlet copper bars respectively;
Main shaft; The two ends of described main shaft are arranged in the axis hole on described insulated switch rack body biside plate, and described main shaft is driven by the driving mechanism being located at its one end and rotates;
Insulation moving contact outer sleeve; Described insulation moving contact outer sleeve is connected copper bar swing type and is connected with two;
Metal moving contact inner sleeve; Described metal moving contact inner sleeve is slidably arranged in the inside of insulation moving contact outer sleeve, and the outer surface of metal moving contact inner sleeve is slidably matched with the inner surface of insulation moving contact outer sleeve;
Moving contact; Described moving contact is fixedly installed in the inner chamber of metal moving contact inner sleeve by contiguous block, and moving contact is fastened on contiguous block;
Insulation adapter sleeve; Described insulation adapter sleeve is fixedly installed on the bottom of metal moving contact inner sleeve;
Shift fork; The lower end of described shift fork is fixedly installed on main shaft, and along main shaft diameter to setting; The upper end of described shift fork is connected with insulation adapter sleeve swing type.
Further improvement, described load switch also comprises fixed head, and described fixed head is connected with insulated switch rack body.The fixed head be connected with insulated switch rack body in the present invention its act on and be: to be conveniently connected with external equipment.
Further improvement, described load switch also comprises metal spacer; Described metal spacer is arranged between insulation moving contact outer sleeve and metal moving contact inner sleeve, and metal spacer is fastened on the outer surface of metal moving contact inner sleeve.The effect of the metal spacer arranged in the present invention is, reduces the friction between insulation moving contact outer sleeve and metal moving contact inner sleeve.
Further improvement, described insulation moving contact outer sleeve is overlapped by the countershaft be symmetricly set on insulation moving contact outer sleeve outer surface and is separately positioned on being rotationally connected between the rotating shaft on two connection copper bars, and realization insulation moving contact outer sleeve is connected copper bar swing type and is connected with two.
Further improvement, described shift fork is by a pair shift fork rotating shaft cover be symmetricly set on the inner surface of shift fork upper end and being rotationally connected between adapter sleeve rotating shaft of insulating for a pair be symmetricly set on insulation adapter sleeve outer surface, and the upper end realizing shift fork is connected with insulation adapter sleeve swing type.
Further improvement, described insulated switch rack body is the Split type structure of symmetrical expression.Insulated switch rack body in the present invention adopts the Split type structure of symmetrical expression, and its effect is convenient to remove and install the maintenance with the later stage.
Present invention also offers a kind of on-load switch of the two-way automatic switching looped network equipment adopting load switch to form, comprise and being in series by three load switches.
Further improvement, described three load switches share same main shaft.This on-load switch can control left side combined floodgate, the separating brake of this on-load switch by a main shaft and close a floodgate in right side, separating brake, and a major loop realizes equipment 4 states.
Further improvement, is describedly often provided with support set between adjacent two load switches.
Further improvement, three load switches, by two screw rods symmetrical both sides running through insulated switch rack body simultaneously, are in series by described three load switches; Described support set is arranged on screw rod.
Apparatus of the present invention beneficial effect is compared with prior art:
1, this load switch is compared with traditional load switch, easy and simple to handle, and volume reduces, lightweight, structure is simple, and decrease failure rate, this load switch structure is conducive to equipment and effectively works, and cost is low, make user easy to learn easy to operate, stop the misoperation that bilateral closes a floodgate simultaneously simultaneously.
2, this on-load switch is compared with traditional on-load switch, easy and simple to handle, and volume reduces, lightweight, structure is simple, and decrease failure rate, this on-load switch structure is conducive to equipment and effectively works, and cost is low, make user easy to learn easy to operate, stop the misoperation that bilateral closes a floodgate simultaneously simultaneously.
3, close a floodgate in the left side that this on-load switch can control this on-load switch by a main shaft, close a floodgate in separating brake and right side, separating brake, and a major loop realizes equipment 4 states.
Accompanying drawing explanation
Fig. 1 is the front view of embodiment 1.
Fig. 2 is the cutaway view of embodiment 1
Fig. 3 is the front view of "on" position on the left of embodiment 1.
Fig. 4 is the front view of embodiment 1 gate-dividing state.
Fig. 5 is the front view of "on" position on the right side of embodiment 1.
Fig. 6 is the stereogram of embodiment 2.
Fig. 7 is the front view of embodiment 2.
Fig. 8 is the vertical view of Fig. 7.
Wherein: 1, main shaft, 2, fixed head, 3, main shaft adpting flange, 4, insulate moving contact outer sleeve, and 5, metal moving contact inner sleeve, 6, inlet wire copper bar, 7, copper bar is connected, 8, insulated switch rack body, 9, shift fork, 10, fixed contact, 11, outlet copper bar, 12, support set, 13, moving contact, 14, metal spacer, 15, metal moving contact inner sleeve, 16, insulate adapter sleeve, and 17, screw rod, 18, wear-resistant block.
Embodiment
For making content of the present invention more become apparent, be further described below in conjunction with accompanying drawing 1-Fig. 8 and embodiment.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The preferred embodiment of the present invention is as follows:
Embodiment 1:
For load switch in the present embodiment, its structure and the course of work are further described.
As Figure 1-5: the load switch in the present embodiment, insulated switch rack body 8 is comprised; Two connect copper bar 7; Two inlet wire copper bars 6; Two outlet copper bars 11; Two fixed contacts 10; Main shaft 1; Insulation moving contact outer sleeve 4; Metal moving contact inner sleeve 5; Moving contact 13; Insulation adapter sleeve 16; Shift fork 9 and metal spacer 14.
Insulated switch rack body 8 in the present embodiment is the Split type structure of symmetrical expression.
Insulated switch rack body 8 upper end in the present embodiment is symmetrically arranged with two and connects copper installation face, and insulated switch rack body 8 lower end is symmetrically arranged with two outlet copper bar installed surfaces; Two connect copper bar 7 and are fixedly installed on two connection copper installation faces of insulated switch rack body 8 upper end; Two inlet wire copper bar 6 symmetries are fixed on and connect on copper bar 7; Two outlet copper bars 11 are separately fixed on two outlet copper bar installed surfaces of insulated switch rack body 8 lower end; Two fixed contact 10 symmetrical lower ends being fixed on insulated switch rack body 8 respectively, and two fixed contacts 10 are connected with described two outlet copper bars 11 respectively; The two ends of main shaft 1 are arranged in the axis hole on described insulated switch rack body 8 biside plate, and main shaft 1 is driven by the driving mechanism being located at its one end and rotates; Insulation moving contact outer sleeve 4 is connected copper bar 7 swing type with two and is connected; Insulation moving contact outer sleeve 4 in the present embodiment is overlapped by the countershaft be symmetricly set on insulation moving contact outer sleeve 4 outer surface and is separately positioned on being rotationally connected between the rotating shaft on two connection copper bars 7, and realization insulation moving contact outer sleeve 4 is connected copper bar 7 swing type with two and is connected.Metal moving contact inner sleeve 5 is slidably arranged in the inside of insulation moving contact outer sleeve 4, and the outer surface of metal moving contact inner sleeve 5 is slidably matched with the inner surface of insulation moving contact outer sleeve 4; Moving contact 13 is fixedly installed in the inner chamber of metal moving contact inner sleeve 5 by contiguous block 15, and moving contact 13 is fastened on contiguous block 15.Contiguous block 15 in the present embodiment is connected in the inner chamber of metal moving contact inner sleeve 5 by screw thread pair; Moving contact 13 is by fastening spring being fixed on contiguous block 15 tightly.Insulation adapter sleeve 16 is fixedly installed on the bottom of metal moving contact inner sleeve 5 by screw thread pair.The lower ending opening place of the insulation adapter sleeve 16 in the present embodiment is provided with wear-resistant block 18.The material that wear-resistant block 18 in the present embodiment is chosen must meet the performance requirement of the high and good insulating of high, the fire-retardant coefficient of mechanical strength.The lower end of shift fork 9 is fixedly installed on main shaft 1, and arranges along main shaft 1 radial direction; The upper end of shift fork 9 is connected with insulation adapter sleeve 16 swing type.Shift fork 9 in the present embodiment is by a pair shift fork rotating shaft cover be symmetricly set on the inner surface of shift fork 9 upper end and being rotationally connected between adapter sleeve rotating shaft of insulating for a pair be symmetricly set on insulation adapter sleeve 16 outer surface, and the upper end realizing shift fork 9 is connected with insulation adapter sleeve 16 swing type.
The course of work of the present embodiment is:
Because the left side making process of the load switch in the present embodiment and the operation of right side making process are identical, therefore the present embodiment is just specifically described for left side making process.
Rotating spindle 1 is driven to rotate to the left by the driving mechanism being located at its one end of main shaft 1 of coupling; Because shift fork 9 lower end is fixedly installed on main shaft 1, main shaft 1 rotates and drives shift fork 9 to rotate; Because shift fork 9 is connected with insulation adapter sleeve 16 swing type, shift fork 9 rotates and pulls insulation adapter sleeve 16 to rotate, thus drive metal moving contact inner sleeve 5 to move, stop until the moving contact 13 moved in metal moving contact inner sleeve 5 fully contacts with fixed contact 10 and puts in place; The moving contact outer sleeve 4 that simultaneously insulate also swings accordingly with this.On the left of it, "on" position as shown in Figure 3.
After closing a floodgate in left side, the current trend in the load switch in the present embodiment is:
Electric current is entered by two inlet wire copper bars 6, flows through two and connects copper bar 7, flow through metal moving contact inner sleeve 5, flow through moving contact 13, flow through fixed contact 10, finally flow through outlet copper bar 11 and be connected to load.
Embodiment 2:
For the on-load switch of the two-way automatic switching looped network equipment be made up of three load switches in the present embodiment, its structure and the course of work are further described.As shown in Fig. 6, Fig. 7 and Fig. 8.
On-load switch in the present embodiment is in series by the load switch in three embodiments 1.For the concrete structure of load switch and the course of work see described in embodiment 1.Specifically, three load switches, by two screw rods 17 symmetrical both sides running through insulated switch rack body 8 simultaneously, are in series by three load switches in the present embodiment in three on-load switches; Described support set 12 is arranged on screw rod 17.
Three load switches in on-load switch in the present embodiment share same main shaft 1.On-load switch in the present embodiment by axle can the left side of control appliance close a floodgate, separating brake and close a floodgate in right side, separating brake, a major loop realizes the realization of equipment 4 states.
Because the course of work in the left side making process of the present embodiment on-load switch, right side making process and embodiment 1 has been identical, described in embodiment 1.
Often support set 12 is provided with between adjacent two load switches in three on-load switches in the present embodiment.
This on-load switch is compared with traditional on-load switch, easy and simple to handle, and volume reduces, lightweight, structure is simple, and decrease failure rate, this on-load switch structure is conducive to equipment and effectively works, and cost is low, make user easy to learn easy to operate, stop the misoperation that bilateral closes a floodgate simultaneously simultaneously.
Insulated switch rack body 8 on on-load switch in the present embodiment is provided with fixed head 2.In the present invention, its effect of fixed head 2 is: be conveniently connected with external equipment.
Part that the present invention does not relate to is all same as the prior art or adopt prior art to be realized.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (10)
1. a load switch, is characterized in that: comprise insulated switch rack body (8); Described insulated switch rack body (8) upper end is symmetrically arranged with two and connects copper installation face, and insulated switch rack body (8) lower end is symmetrically arranged with two outlet copper bar installed surfaces;
Two connect copper bar (7); Described two connections copper bar (7) are fixedly installed on two connection copper installation faces of insulated switch rack body (8) upper end;
Two inlet wire copper bars (6); Described two inlet wire copper bar (6) symmetries are fixed on and connect on copper bar (7);
Two outlet copper bars (11); Described two outlet copper bars (11) are separately fixed on two outlet copper bar installed surfaces of insulated switch rack body (8) lower end;
Two fixed contacts (10); Described two fixed contacts (10) respectively symmetry are fixed on the lower end of insulated switch rack body (8), and two fixed contacts (10) are connected with described two outlet copper bars (11) respectively;
Main shaft (1); The two ends of described main shaft (1) are arranged in the axis hole on described insulated switch rack body (8) biside plate, and described main shaft (1) is driven by the driving mechanism being located at its one end and rotates;
Insulation moving contact outer sleeve (4); Described insulation moving contact outer sleeve (4) is connected copper bar (7) swing type and is connected with two;
Metal moving contact inner sleeve (5); Described metal moving contact inner sleeve (5) is slidably arranged in the inside of insulation moving contact outer sleeve (4), and the outer surface of metal moving contact inner sleeve (5) is slidably matched with the inner surface of insulation moving contact outer sleeve (4);
Moving contact (13); Described moving contact (13) is fixedly installed in the inner chamber of metal moving contact inner sleeve (5) by contiguous block (15), and moving contact (13) is fastened on contiguous block (15);
Insulation adapter sleeve (16); Described insulation adapter sleeve (16) is fixedly installed on the bottom of metal moving contact inner sleeve (5);
Shift fork (9); The lower end of described shift fork (9) is fixedly installed on main shaft (1), and arranges along main shaft (1) radial direction; The upper end of described shift fork (9) is connected with insulation adapter sleeve (16) swing type.
2. load switch according to claim 1, is characterized in that: described load switch also comprises fixed head (2), and described fixed head (2) is connected with insulated switch rack body (8).
3. load switch according to claim 1, is characterized in that: described load switch also comprises metal spacer (14); Described metal spacer (14) is arranged between insulation moving contact outer sleeve (4) and metal moving contact inner sleeve (5), and metal spacer (14) is fastened on the outer surface of metal moving contact inner sleeve (5).
4. load switch according to claim 1, it is characterized in that: described insulation moving contact outer sleeve (4) is overlapped by the countershaft be symmetricly set on insulation moving contact outer sleeve (4) outer surface and is separately positioned on being rotationally connected between the rotating shaft on two connections copper bar (7), and realization insulation moving contact outer sleeve (4) is connected copper bar (7) swing type and is connected with two.
5. load switch according to claim 1, it is characterized in that: described shift fork (9) is overlapped by a pair shift fork rotating shaft be symmetricly set on the inner surface of shift fork (9) upper end and is symmetricly set on being rotationally connected between a pair insulation adapter sleeve rotating shaft on insulation adapter sleeve (16) outer surface, and the upper end realizing shift fork (9) is connected with insulation adapter sleeve (16) swing type.
6. load switch according to claim 1, is characterized in that: the Split type structure that described insulated switch rack body (8) is symmetrical expression.
7. the on-load switch of the two-way automatic switching looped network equipment adopting the load switch described in any one of claim 1-6 to form, is characterized in that: comprise and being in series by three load switches.
8. load switch according to claim 7, is characterized in that: described three load switches share same main shaft (1).
9. load switch according to claim 7, is characterized in that: be describedly often provided with support set (12) between adjacent two load switches.
10. load switch according to claim 9, is characterized in that: described three load switches run through the both sides of insulated switch rack body (8) by symmetry while of two screw rods (17), are in series by three load switches; Described support set (12) is arranged on screw rod (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704658.0A CN104409271B (en) | 2014-11-27 | 2014-11-27 | A kind of load switch and its on-load switch being made up of load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704658.0A CN104409271B (en) | 2014-11-27 | 2014-11-27 | A kind of load switch and its on-load switch being made up of load switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104409271A true CN104409271A (en) | 2015-03-11 |
| CN104409271B CN104409271B (en) | 2017-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410704658.0A Active CN104409271B (en) | 2014-11-27 | 2014-11-27 | A kind of load switch and its on-load switch being made up of load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104409271B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510098A (en) * | 2018-11-19 | 2019-03-22 | 珠海许继电气有限公司 | A kind of insulated switching installation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5902979A (en) * | 1997-01-15 | 1999-05-11 | Lg Industrial Systems Co., Ltd. | Gas insulation type load break system |
| CN202190118U (en) * | 2011-08-24 | 2012-04-11 | 湖州泰仑电力设备有限公司 | Medium voltage double-power load switch |
| CN103903901A (en) * | 2014-04-23 | 2014-07-02 | 苏金发 | Contact mechanism of three-position high-voltage switch |
| CN203871259U (en) * | 2014-04-23 | 2014-10-08 | 苏金发 | Inflatable three-station high-voltage switch |
| CN203871258U (en) * | 2014-04-23 | 2014-10-08 | 苏金发 | Contact mechanism of three-station high-voltage switch |
| CN204242923U (en) * | 2014-11-27 | 2015-04-01 | 无锡飞世龙机电有限公司 | A kind of load switch and the on-load switch be made up of load switch thereof |
-
2014
- 2014-11-27 CN CN201410704658.0A patent/CN104409271B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5902979A (en) * | 1997-01-15 | 1999-05-11 | Lg Industrial Systems Co., Ltd. | Gas insulation type load break system |
| CN202190118U (en) * | 2011-08-24 | 2012-04-11 | 湖州泰仑电力设备有限公司 | Medium voltage double-power load switch |
| CN103903901A (en) * | 2014-04-23 | 2014-07-02 | 苏金发 | Contact mechanism of three-position high-voltage switch |
| CN203871259U (en) * | 2014-04-23 | 2014-10-08 | 苏金发 | Inflatable three-station high-voltage switch |
| CN203871258U (en) * | 2014-04-23 | 2014-10-08 | 苏金发 | Contact mechanism of three-station high-voltage switch |
| CN204242923U (en) * | 2014-11-27 | 2015-04-01 | 无锡飞世龙机电有限公司 | A kind of load switch and the on-load switch be made up of load switch thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510098A (en) * | 2018-11-19 | 2019-03-22 | 珠海许继电气有限公司 | A kind of insulated switching installation |
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| Publication number | Publication date |
|---|---|
| CN104409271B (en) | 2017-07-07 |
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