CN109148208B - Interlocking device of circuit breaker and isolating switch and high-voltage switch equipment - Google Patents
Interlocking device of circuit breaker and isolating switch and high-voltage switch equipment Download PDFInfo
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- CN109148208B CN109148208B CN201810903733.4A CN201810903733A CN109148208B CN 109148208 B CN109148208 B CN 109148208B CN 201810903733 A CN201810903733 A CN 201810903733A CN 109148208 B CN109148208 B CN 109148208B
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- 238000005452 bending Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 4
- 206010063385 Intellectualisation Diseases 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 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
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/10—Interlocking mechanisms for interlocking two or more switches
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to an interlocking device of a circuit breaker and a disconnecting switch and high-voltage switch equipment, and aims to solve the problem that an electromagnetic lock is adopted to prevent misoperation in the prior art, so that the operation process is complicated. The interlocking device of the circuit breaker and the disconnecting switch comprises a base and a shielding piece movably assembled on the base, wherein the shielding piece is provided with a shielding part used for shielding a manual operation shaft of the disconnecting switch, and the interlocking device further comprises a driving mechanism which drives the shielding piece to move so as to shield the manual operation shaft of the disconnecting switch when the circuit breaker is switched on and drives the shielding piece to move so as to open the manual operation shaft of the disconnecting switch when the circuit breaker is switched off. The invention realizes the purpose of preventing the manual operating shaft of the isolating switch from being operated by mistake by arranging the shielding piece with the shielding part, and compared with the prior art that a box door needs to be arranged outside the manual operating shaft of the isolating switch, the invention has simple operation and easy realization of automation and intellectualization.
Description
Technical Field
The invention relates to an interlocking device of a circuit breaker and a disconnecting switch and high-voltage switch equipment.
Background
High-voltage switchgear generally comprises a large variety of switches, such as circuit breakers, disconnectors, etc., which need to follow a certain sequence when operating, for example when opening a circuit, the sequence being as follows: the breaker is opened and the isolating switch is opened; when the loop is switched on, the sequence is as follows: disconnecting switch closing-circuit breaker closing. If the operation sequence is not correct, destructive damage is generated to the high-voltage switch equipment, and at this time, the electric interlocking among the switches is needed, for example, if the breaker is not opened, the disconnecting switch cannot be opened. Therefore, a special device is needed to be arranged, the disconnecting switch is prevented from being operated when the breaker is in a closing state, and the disconnecting switch can be operated when the breaker is in an opening state.
The disconnecting switch generally comprises a disconnecting switch body and a motor operating mechanism, wherein a manual operating shaft is arranged in the motor operating mechanism, and switching-on and switching-off of the disconnecting switch can be realized by operating the manual operating shaft. In the prior art, in order to prevent the misoperation of the disconnecting switch under the closing state of the circuit breaker, the manual operation shaft needs to be shielded to prevent the manual misoperation when the circuit breaker is in the closing state. At present, no device specially used for realizing the functions is arranged at home, a box door and an electromagnetic lock are arranged outside a manual operation shaft all the time, the box door is opened firstly when the manual operation shaft needs to be operated, then the manual operation shaft is operated, although the requirement of preventing misoperation can be met, the electromagnetic lock is large in size and complex in installation and operation process.
Disclosure of Invention
The invention aims to provide an interlocking device of a circuit breaker and a disconnecting switch, which aims to solve the problem that the prior art adopts an electromagnetic lock to prevent misoperation so as to cause complex operation flow; a high voltage switchgear using the interlock apparatus is also provided.
In order to achieve the purpose, the technical scheme of the interlocking device of the circuit breaker and the isolating switch is as follows:
the first scheme of the interlocking device of the circuit breaker and the disconnecting switch comprises the following steps: the utility model provides a circuit breaker and isolator's interlock, includes base and the shielding piece of activity assembly on the base, shielding piece has the shielding part that is used for sheltering from isolator manual operation axle, and interlock still includes the actuating mechanism that drives shielding piece action in order to shelter from isolator manual operation axle, drive shielding piece action in order to let and open isolator manual operation axle when separating brake when the circuit breaker closes a floodgate.
The invention has the beneficial effects that: the interlocking device comprises a base, a shielding piece movably assembled on the base, a driving mechanism and a driving mechanism, wherein the shielding piece is provided with a shielding part used for shielding a manual operating shaft of the isolating switch, the driving mechanism drives the shielding piece to shield the manual operating shaft of the isolating switch when the circuit breaker is switched on so as to prevent misoperation of an operator, and drives the shielding piece to open the manual operating shaft of the isolating switch when the circuit breaker is switched off so as to be operated by the operator. The invention realizes the purpose of preventing the manual operating shaft of the isolating switch from being operated by mistake by arranging the shielding piece with the shielding part, and compared with the prior art that a box door needs to be arranged outside the manual operating shaft of the isolating switch, the invention has simple operation and easy realization of automation and intellectualization.
And the second scheme of the interlocking device of the circuit breaker and the disconnecting switch is as follows: on the basis of the first scheme, the driving mechanism comprises an electromagnet which is arranged on the base and drives the shielding piece to move when being electrified so as to open the manual operation shaft of the isolating switch, and a reset piece which is arranged on the base and drives the shielding piece to move reversely after the electromagnet is powered off so as to shield the manual operation shaft of the isolating switch.
The electromagnet and the reset piece are matched to realize the shielding and the yielding of the manual operation shaft of the isolating switch, and the function can be realized by controlling the power failure of the electromagnet, so that the operation is convenient.
And the third scheme of the interlocking device of the circuit breaker and the disconnecting switch is as follows: on the basis of the second scheme, the electromagnet is connected with power supply through a power supply line, and the interlocking device further comprises a control switch which is used for switching on the power supply line when the breaker is switched off and switching off the power supply line when the breaker is switched on.
And meanwhile, mechanical interlocking and electrical interlocking are adopted, so that the interlocking between the isolating switch and the circuit breaker can be further ensured.
The fourth scheme of the interlocking device of the circuit breaker and the disconnecting switch is as follows: on the basis of the second or third scheme, a guide rod extending along the moving direction of the shielding piece is convexly arranged on the base, and the shielding piece is sleeved on the guide rod in a guiding mode.
The guide rod can guide the shielding piece, and guide movement of the shielding piece is guaranteed.
And a fifth scheme of the interlocking device of the circuit breaker and the disconnecting switch: on the basis of the fourth scheme, the shielding piece is of an L-shaped plate structure, the L-shaped shielding piece comprises a first edge sleeved on the guide rod, a second edge is arranged at the end part, far away from the base, of the first edge in a bending mode, and the shielding part is arranged on the second edge.
The space formed by the first edge and the second edge in the L-shaped shielding piece can be used for the manual operation shaft of the isolating switch to extend into, and the compact design is realized.
And a sixth scheme of the interlocking device of the circuit breaker and the disconnecting switch: on the basis of the fifth scheme, the shielding piece is provided with an operation window which is used for corresponding to the manual operation shaft of the isolating switch so as to open the manual operation shaft of the isolating switch.
And a seventh scheme of the interlocking device of the circuit breaker and the disconnecting switch: on the basis of the second scheme, the electromagnet comprises a coil support fixedly arranged on the base, an electromagnetic coil is arranged in the coil support, a movable push rod penetrates through the electromagnetic coil and is connected with a shielding piece, one end, deviating from the shielding piece, of the movable push rod penetrates out of the electromagnetic coil and the coil support, an outward turning edge is arranged at the end of the movable push rod, and the reset piece is a reset spring pressed between the outward turning edge and the coil support through elasticity.
The technical scheme of the high-voltage switch equipment is as follows:
scheme one of the high-voltage switchgear: the utility model provides a high tension switchgear, includes circuit breaker and isolator, and isolator includes operating device, and operating device has isolator manually operation axle, and high tension switchgear still includes interlock, and interlock includes base and the shielding piece of movable assembly on the base, shielding piece has the shielding part that is used for sheltering from isolator manually operation axle, and interlock still includes the actuating mechanism who drives shielding piece action in order to shelter from isolator manually operation axle, drive shielding piece action in the time of separating brake when the circuit breaker closes a floodgate so that to open isolator manually operation axle.
Scheme two of the high-voltage switchgear: on the basis of the first scheme, the driving mechanism comprises an electromagnet which is arranged on the base and drives the shielding piece to move when being electrified so as to open the manual operation shaft of the isolating switch, and a reset piece which is arranged on the base and drives the shielding piece to move reversely after the electromagnet is powered off so as to shield the manual operation shaft of the isolating switch.
Scheme three of the high-voltage switchgear: on the basis of the second scheme, the electromagnet is connected with power supply through a power supply line, and the interlocking device further comprises a control switch which is used for switching on the power supply line when the breaker is switched off and switching off the power supply line when the breaker is switched on.
Scheme four of the high-voltage switchgear: on the basis of the second or third scheme, a guide rod extending along the moving direction of the shielding piece is convexly arranged on the base, and the shielding piece is sleeved on the guide rod in a guiding mode.
Scheme five of the high-voltage switchgear: on the basis of the fourth scheme, the shielding piece is of an L-shaped plate structure, the L-shaped shielding piece comprises a first edge sleeved on the guide rod, a second edge is arranged at the end part, far away from the base, of the first edge in a bending mode, and the shielding part is arranged on the second edge.
Scheme six of the high-voltage switchgear: on the basis of the fifth scheme, the shielding piece is provided with an operation window which is used for corresponding to the manual operation shaft of the isolating switch so as to open the manual operation shaft of the isolating switch.
Scheme seven of the high-voltage switchgear: on the basis of the second scheme, the electromagnet comprises a coil support fixedly arranged on the base, an electromagnetic coil is arranged in the coil support, a movable push rod penetrates through the electromagnetic coil and is connected with a shielding piece, one end, deviating from the shielding piece, of the movable push rod penetrates out of the electromagnetic coil and the coil support, an outward turning edge is arranged at the end of the movable push rod, and the reset piece is a reset spring pressed between the outward turning edge and the coil support through elasticity.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an interlock device for a circuit breaker and a disconnector according to the invention;
FIG. 2 is a schematic view of the interlock arrangement of the circuit breaker and the disconnector blocking the manually operated shaft of the disconnector according to the invention;
FIG. 3 is a front view of FIG. 2;
figure 4 is a schematic view of the interlock arrangement of the circuit breaker and disconnector of the invention, with the manually operated shaft of the disconnector being moved away;
FIG. 5 is a front view of FIG. 4;
fig. 6 is a schematic diagram of the electrical components of the interlock device for a circuit breaker and disconnector according to the invention.
In the attached drawings, 1-a reducer; 2-an interlock; 21-fixing the plate; 22-a coil support; 23-an electromagnetic coil; 24-a movable push rod; 25-a shutter; 26-pan head screw; 27-bending a plate; 28-hexagonal nut; 29-a guide bar; 210-an operating window; 211-a return spring; 3-a manually operated shaft; 4-a motor; 5-opening and closing contacts of the circuit breaker.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The specific embodiment of the interlocking device for the circuit breaker and the disconnecting switch is shown in fig. 1 to 6, the interlocking device ensures the interlocking between the circuit breaker and the disconnecting switch, the disconnecting switch comprises a motor operating mechanism, the motor operating mechanism comprises a motor 4 and a speed reducer 1, the speed reducer 1 is provided with a manual operating shaft 3, and the manual operating shaft 3 can be rotated to drive the motor operating mechanism to act, so that the opening and closing operation of the disconnecting switch is realized.
The interlocking device 2 is arranged outside the speed reducer 1, the interlocking device 2 comprises a fixing plate 21 fixed outside the speed reducer, a coil support 22 is mounted on the fixing plate 21, an electromagnetic coil 23 is fixed in the coil support 22, a movable push rod 24 penetrates through the electromagnetic coil, and the telescopic direction of the movable push rod 24 is perpendicular to the axial direction of the manual operation shaft 3. When in use, the movable push rod 24 can move telescopically after the electromagnetic coil 23 is electrified. One end of the movable push rod 24, which is close to the manual operation shaft 3, penetrates through the electromagnetic coil 23, a shielding plate 25 is fixed on the end, the shielding plate 25 is of an L-shaped plate structure, the shielding plate 25 comprises a first side of the shielding plate fixedly connected with the movable push rod 24 and a second side of the shielding plate perpendicular to the first side of the shielding plate, the second side of the shielding plate is arranged at the end part, deviating from the fixed plate, of the first side of the shielding plate, and a space capable of accommodating the manual operation shaft 3 is formed between the shielding plate and the fixed plate 21. An operation window 210 is opened on the second edge of the shielding plate, and the operation window 210 can be passed by an operation member such as an external handle.
The fixed plate 21 is also convexly provided with a bent plate 27, the bent plate 27 is of an L-shaped plate structure, the L-shaped bent plate comprises a first edge of the bent plate attached to the fixed plate 21, and the first edge of the bent plate is fixed on the fixed plate through a pan head screw 26, a spring washer and a flat washer. A guide rod 29 is fixed on the second side of the bent plate by a hexagonal nut 28, and the axial direction of the guide rod 29 is parallel to the axial direction of the movable push rod 24. Specifically, one end of the guide bar 29 is threaded onto the second side of the bent plate and backed up by a hex nut 28. The bent plate 27 is located above the coil holder 22, and a through hole is formed in a first side of the shielding plate, which is fitted around the guide rod. The baffle plate can be ensured to move along the telescopic direction of the movable push rod through the guiding action of the guide rod.
One end of the movable push rod 24, which is far away from the manual operation shaft 3, penetrates out of the coil support 22, an outward turning edge is arranged on the end, a return spring 211 is sleeved on the movable push rod 24, the return spring 211 is elastically pressed between the coil support 22 and the outward turning edge, when the electromagnetic coil 23 is not electrified, the shielding plate 25 is reset under the action of the return spring 211, and the shielding plate 25 is kept at a position for shielding the manual operation shaft 3. When the electromagnetic coil 23 is powered off, the reset spring can drive the shielding plate to move towards the direction of the coil bracket.
In this embodiment, the electromagnetic coil is connected to a power supply through a power supply line, and a button and a breaker opening and closing contact 5 are provided on the power supply line. When circuit breaker divide-shut brake contact 5 was closed, can make solenoid get electric through pressing the button, and then promote the shielding plate and remove, let open the manually operation axle, supply operating personnel to carry out manual operation, after the operation was accomplished, the disconnection of button control power supply line, the shielding plate shelters from the manually operation axle again at reset spring's effort, prevents operating personnel maloperation. When the breaker opening and closing contact 5 is opened, the electromagnetic coil cannot be electrified even if the button is pressed.
The using process of the invention is as follows: when the circuit breaker and the isolating switch are both in a closing state, the circuit breaker sends a closing instruction, the opening and closing contact 5 of the circuit breaker is opened and closed, the button does not work, and the shielding plate shields a manual operation shaft of an operating mechanism of a motor of the isolating switch under the action of the reset spring to prevent misoperation of an operator. After the circuit breaker is opened, the circuit breaker sends an opening indication, the opening and closing contacts 5 of the circuit breaker are closed, the button is pressed, the power supply line of the electromagnetic coil is conducted, the electromagnetic coil 23 is electrified to drive the movable push rod to drive the shielding plate 25 to move towards the direction departing from the coil support, as shown in fig. 4 and 5, at the moment, the operation window 210 on the shielding plate 25 is aligned with the manual operation shaft 3, and an operator can operate to enable the isolating switch to be in an opening state. When a loop is closed, an operator firstly performs manual operation to place the isolating switch in a closing state, then the breaker performs closing, a closing instruction is sent in the closing process, a power supply line of the electromagnetic coil is disconnected, and the shielding plate shields the manual operation shaft again to prevent misoperation of the operator.
The portion of the shielding plate for shielding the manual operation shaft is a shielding portion. The manual operation shaft is an isolating switch manual operation shaft. In this embodiment, the return spring constitutes the return element, and in other embodiments, the return element may be another elastic element, such as an elastic sheet. In this embodiment, the electromagnetic coil, the coil support and the movable push rod constitute an electromagnet. The breaker opening and closing contacts 5 constitute a control switch. The electromagnet and the reset piece jointly form a driving mechanism.
In this embodiment, the fixed plate constitutes the base, and the shielding plate constitutes the shielding piece, and in other embodiments, the shape and structure of the shielding piece can be changed according to actual conditions. The shielding piece can be directly pushed away from the manual operation shaft of the isolating switch after the electromagnet is electrified without arranging an operation window.
In the above embodiment, the electromagnet drives the shielding piece to shield the manual operating shaft of the isolating switch after being electrified, and the reset piece drives the shielding piece to shield the manual operating shaft of the isolating switch after the electromagnet is electrified. In other embodiments, the roles of the electromagnet and the reset member may be reversed.
In the specific embodiment of the high-voltage switch device, the high-voltage switch device comprises the circuit breaker, the disconnecting switch and the interlocking device, and the structure of the interlocking device is the same as that in the embodiment, and the details are not repeated.
Claims (8)
1. The utility model provides a circuit breaker and isolator's interlock which characterized in that: the interlocking device comprises a base, a shielding piece movably assembled on the base, a driving mechanism and a locking mechanism, wherein the shielding piece is provided with a shielding part used for shielding a manual operating shaft of the disconnecting switch; the driving mechanism comprises an electromagnet which is arranged on the base and drives the shielding piece to move when being electrified so as to open the manual operation shaft of the isolating switch, and a reset piece which is arranged on the base and drives the shielding piece to move reversely after the electromagnet is electrified so as to shield the manual operation shaft of the isolating switch; a guide rod extending along the moving direction of the shielding piece is convexly arranged on the base, and the shielding piece is sleeved on the guide rod in a guiding manner; the shielding piece is of an L-shaped plate structure, the L-shaped shielding piece comprises a first edge sleeved on the guide rod, a second edge is arranged at the end part, far away from the base, of the first edge in a bending mode, and the shielding part is arranged on the second edge.
2. The circuit breaker and disconnector interlock according to claim 1, characterized in that: the electromagnet is connected with power supply through a power supply line, and the interlocking device further comprises a control switch which is used for switching on the power supply line when the breaker is switched off and switching off the power supply line when the breaker is switched on.
3. The circuit breaker and disconnector interlock according to claim 1, characterized in that: the shielding piece is provided with an operation window which is used for corresponding to the manual operation shaft of the isolating switch so as to open the manual operation shaft of the isolating switch.
4. The circuit breaker and disconnector interlock according to claim 1, characterized in that: the electromagnet comprises a coil support fixedly arranged on the base, an electromagnetic coil is arranged in the coil support, a movable push rod penetrates through the electromagnetic coil and is connected with a shielding piece, one end of the movable push rod, which deviates from the shielding piece, penetrates out of the electromagnetic coil and the coil support, an outward turning edge is arranged at the end of the movable push rod, and the reset piece is a reset spring which is elastically pressed between the outward turning edge and the coil support.
5. A high-voltage switch device comprises a circuit breaker and a disconnecting switch, wherein the disconnecting switch comprises an operating mechanism, the operating mechanism is provided with a disconnecting switch manual operation shaft, and the high-voltage switch device is characterized in that: the high-voltage switch equipment also comprises an interlocking device, the interlocking device comprises a base and a shielding piece movably assembled on the base, the shielding piece is provided with a shielding part used for shielding the manual operation shaft of the isolating switch, the interlocking device also comprises a driving mechanism which drives the shielding piece to act to shield the manual operation shaft of the isolating switch when the circuit breaker is switched on and drives the shielding piece to act to open the manual operation shaft of the isolating switch when the circuit breaker is switched off; the driving mechanism comprises an electromagnet which is arranged on the base and drives the shielding piece to move when being electrified so as to open the manual operation shaft of the isolating switch, and a reset piece which is arranged on the base and drives the shielding piece to move reversely after the electromagnet is electrified so as to shield the manual operation shaft of the isolating switch; a guide rod extending along the moving direction of the shielding piece is convexly arranged on the base, and the shielding piece is sleeved on the guide rod in a guiding manner; the shielding piece is of an L-shaped plate structure, the L-shaped shielding piece comprises a first edge sleeved on the guide rod, a second edge is arranged at the end part, far away from the base, of the first edge in a bending mode, and the shielding part is arranged on the second edge.
6. The high voltage switchgear as claimed in claim 5, wherein: the electromagnet is connected with power supply through a power supply line, and the interlocking device further comprises a control switch which is used for switching on the power supply line when the breaker is switched off and switching off the power supply line when the breaker is switched on.
7. The high voltage switchgear as claimed in claim 5, wherein: the shielding piece is provided with an operation window which is used for corresponding to the manual operation shaft of the isolating switch so as to open the manual operation shaft of the isolating switch.
8. The high voltage switchgear as claimed in claim 5, wherein: the electromagnet comprises a coil support fixedly arranged on the base, an electromagnetic coil is arranged in the coil support, a movable push rod penetrates through the electromagnetic coil and is connected with a shielding piece, one end of the movable push rod, which deviates from the shielding piece, penetrates out of the electromagnetic coil and the coil support, an outward turning edge is arranged at the end of the movable push rod, and the reset piece is a reset spring which is elastically pressed between the outward turning edge and the coil support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903733.4A CN109148208B (en) | 2018-08-09 | 2018-08-09 | Interlocking device of circuit breaker and isolating switch and high-voltage switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903733.4A CN109148208B (en) | 2018-08-09 | 2018-08-09 | Interlocking device of circuit breaker and isolating switch and high-voltage switch equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109148208A CN109148208A (en) | 2019-01-04 |
| CN109148208B true CN109148208B (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810903733.4A Active CN109148208B (en) | 2018-08-09 | 2018-08-09 | Interlocking device of circuit breaker and isolating switch and high-voltage switch equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN109148208B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578817A (en) * | 2012-08-03 | 2014-02-12 | 广东米勒电气有限公司 | Interlocking device for disconnector and circuit breaker |
| CN204155796U (en) * | 2014-10-27 | 2015-02-11 | 深圳市深开电器实业有限公司 | A kind of low voltage switchgear safe lock mechanism |
| US9336963B1 (en) * | 2014-11-04 | 2016-05-10 | Cooper Technologies Company | Interlock assembly for network transformer primary disconnect assembly |
| CN204315416U (en) * | 2014-12-05 | 2015-05-06 | 甘肃长城电工电器工程研究院有限公司 | Interlock is used between a kind of circuit breaker and isolating switch |
| CN205564576U (en) * | 2016-04-20 | 2016-09-07 | 陈伟东 | Electromagnetism blocking device by step motor control |
| CN106710950B (en) * | 2016-12-30 | 2018-09-25 | 华仪电气股份有限公司 | A kind of interlocking operation mechanism and the high-tension switch gear with it |
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2018
- 2018-08-09 CN CN201810903733.4A patent/CN109148208B/en active Active
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