CN110332358B - Intelligent drain valve - Google Patents
Intelligent drain valve Download PDFInfo
- Publication number
- CN110332358B CN110332358B CN201910530904.8A CN201910530904A CN110332358B CN 110332358 B CN110332358 B CN 110332358B CN 201910530904 A CN201910530904 A CN 201910530904A CN 110332358 B CN110332358 B CN 110332358B
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- drain valve
- valve body
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 128
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000004887 air purification Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Temperature-Responsive Valves (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to the field of automobile compressed air purification, and discloses an intelligent drain valve which comprises a valve body (2), wherein a valve cavity (203) is further arranged in the valve body (2), a water level sensor (3) is mounted in the valve cavity (203), the intelligent drain valve also comprises a controller (1), the controller (1) is connected with the water level sensor (3), a valve core (4) is mounted in the valve cavity (203), and the controller (1) controls the up-and-down movement of the valve core (4) and drains water. The electromagnet is arranged in the drain valve, so that the valve can be automatically opened for draining water without manual operation, and the convenience is extremely high; the water level information in the drain valve can be automatically acquired, and the drain valve is matched with an external controller to realize drainage according to needs, so that corrosion and functional damage of parts at the rear end of the air cylinder due to untimely drainage can be avoided; the automatic environmental temperature information of acquireing cooperates with external controller, realizes the self-heating to the drain valve, prevents that ponding from condensing into ice in the drain valve, and the drainage function is inefficacy.
Description
Technical Field
The invention relates to the field of automobile compressed air purification, in particular to an intelligent drain valve.
Background
The power source of the braking system, the clutch control system and other systems of the medium and heavy truck is compressed air, and the compressed air is generated by an air compressor and is stored in an air storage cylinder through a dryer. Although the desiccator can absorb the moisture in the air compressor machine produced the compressed air, if the desiccator had not changed to life, moisture in the compressed air can enter into the gas receiver, and compressed air temperature probably exceeds ambient temperature in addition a lot, and in ambient temperature decline in-process, compressed air can take place the liquefaction in the gas receiver, will deposit water in the gas receiver like this.
At present, a brake system of a passenger car basically adopts air braking, and an experienced maintenance worker is required to climb under a chassis of the car to find each air storage cylinder according to the regulation and on time, and manually pull a drain valve to drain water. Particularly, in coastal and northern areas, the water content is high, and if water is not drained in time, air valves are blocked and pipelines are frozen, so that the safety of the passenger car is influenced. A plurality of intelligent drainage products appear in the market at present, and more public transport companies can select the intelligent drainage products for use. But the price is high, the maintenance cost is high and the like. Therefore, the use method of the intelligent drainage system with low installation cost and convenient maintenance is needed to be provided.
The existing automobile air storage cylinder drain valve adopts a manual mechanical drain valve, a driver needs to drain water regularly, but if the water is not drained on time due to the reason of the driver, the water in the air storage cylinder can enter subsequent parts, so that the parts are corroded, the function is seriously influenced, and the running safety of the automobile is endangered.
In addition, the existing mechanical drain valve has no temperature detection and automatic heating functions, and in northern areas of China in winter, water in the air storage cylinder can freeze when reaching 0 ℃, so that the drain valve is blocked, and the drainage function fails.
At present, the invention patent with patent number 201810987458.9 discloses an installation structure of a drain valve of an engine cylinder, which is characterized in that the drain valve on a cylinder cover is installed by penetrating through a cylinder cover cooling water cavity, so that the cooling problem of the drain valve is solved, the working reliability and the service life of the drain valve are improved, but the installation structure also has the defects of incapability of automatically controlling the drain valve, incapability of monitoring the temperature, easiness in accumulating impurities and the like.
Disclosure of Invention
The invention provides an intelligent drain valve aiming at the defects that in the prior art, the drain cannot be automatically controlled, the temperature cannot be monitored, impurities are easy to accumulate and the like.
In order to solve the technical problem, the invention is solved by the following technical scheme:
the intelligent drain valve comprises a valve body, wherein a water inlet and a water outlet are formed in the valve body, a valve cavity is further formed in the valve body, the water inlet and the water outlet are respectively formed in the upper end and the lower end of the valve cavity and communicated with the valve cavity, a water level sensor is installed in the valve cavity, the intelligent drain valve further comprises a controller, the controller is connected with the water level sensor and receives a water level signal sent by the water level sensor, a valve core is installed in the valve cavity, and the controller controls the valve core.
Preferably, the water level sensors are copper needles, the number of the water level sensors is multiple, and the water level sensors are uniformly distributed at the cavity bottom of the valve cavity.
Preferably, the valve further comprises a heating plate and a temperature sensor which are arranged at the bottom of the valve cavity, the temperature sensor detects the temperature in the valve cavity and generates a temperature signal to be sent to the controller, and the controller is connected with the heating plate and controls the operation of the heating plate.
Preferably, the water inlet device further comprises a filter screen positioned in the water inlet, an annular groove is formed in the inner wall of the water inlet, the filter screen is matched with the annular groove and rotates in the annular groove, a plurality of spiral flow guide grooves are further formed in the inner wall of the water inlet, and the spiral flow guide grooves are positioned above the annular groove and spirally guide water flow to the filter screen.
Preferably, the valve body comprises an upper valve body and a lower valve body, a valve cavity is formed by the inner walls of the upper valve body and the lower valve body, a spring is installed between the valve core and the upper valve body, and the valve core is tightly pressed on the water outlet through the acting force of the spring.
Preferably, the water valve further comprises a manual water discharging rod arranged on the lower valve body, the manual water discharging rod is located in the water outlet and stretches up and down, a positioning groove is formed in the inner wall of the lower end of the water outlet, a positioning ring matched with the positioning groove is arranged on the manual water discharging rod, the upper end of the manual water discharging rod is in contact with the valve core, and the manual water discharging rod pushes the valve core to move upwards and open the water outlet by overcoming the action of a spring.
Preferably, the manual water discharging rod is hollow and forms a backflushing pipeline, the backflushing pipeline is connected with the water tank, a plurality of backflushing holes communicated with the backflushing pipeline are formed in the wall surface of the manual water discharging rod, and the backflushing holes are scattered outwards in the axial direction.
Preferably, the upper end of the water outlet is provided with an outward-expanding opening, the diameter of the outward-expanding opening is gradually increased upwards, and the outward-expanding opening is also provided with a spiral drainage convex strip.
Preferably, a coil which is arranged with the valve core and is positioned outside the valve core is arranged in the valve cavity, the controller controls the connection with the coil and controls the on-off of the coil, and the coil forms an electromagnet after being electrified and controls the up-and-down movement of the valve core to discharge water.
Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the electromagnet is arranged in the drain valve, so that the valve can be automatically opened for draining, manual operation is not needed, and the convenience is extremely high; the water level information in the drain valve can be automatically acquired, and the drain valve is matched with an external controller to realize drainage according to needs, so that corrosion and functional damage of parts at the rear end of the air cylinder due to untimely drainage can be avoided; the automatic water drain system automatically acquires environmental temperature information, and is matched with an external controller to realize automatic heating of the water drain valve, prevent accumulated water in the water drain valve from condensing into ice and prevent the water drain function from being invalid; in addition, a back washing device is also arranged, so that fine metal particles are effectively prevented from being accumulated in the valve, and the service life of the drain valve is prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partial structural schematic diagram of fig. 1.
Fig. 3 is a schematic view of the structure of the water inlet of fig. 1.
The names of the parts indicated by the numerical references in the drawings are as follows: 1-controller, 2-valve body, 3-water level sensor, 4-valve core, 5-filter screen, 6-heating plate, 7-spring, 8-manual water discharging rod, 9-coil, 21-upper valve body, 22-lower valve body, 201-water inlet, 202-water outlet, 203-valve cavity, 2011-annular groove, 2012-spiral diversion trench, 2021-positioning groove, 2022-external expansion opening, 2023-spiral diversion raised line, 61-temperature sensor, 81-positioning ring, 811-reverse punching hole, 82-water tank, 83-positioning ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
Intelligence drain valve, as shown in the figure, including valve body 2, be equipped with water inlet 201 and delivery port 202 on the valve body 2, still be equipped with valve chamber 203 in the valve body 2, water inlet 201 and delivery port 202 set up respectively at the upper and lower both ends of valve chamber 203 and communicate with valve chamber 203, install level sensor 3 in the valve chamber 203, still include controller 1, controller 1 is connected with level sensor 3 and receives the water level signal that level sensor 3 sent, install case 4 in the valve chamber 203, controller 1 control reciprocating of case 4 and drainage.
The water level sensors 3 are copper needles, the water level sensors 3 are multiple, and the water level sensors 3 are uniformly distributed at the cavity bottom of the valve cavity 203.
The heating device also comprises a heating plate 6 and a temperature sensor 61 which are arranged at the bottom of the cavity of the valve cavity 203, wherein the temperature sensor 61 detects the temperature in the valve cavity 203 and generates a temperature signal to be sent to the controller 1, and the controller 1 is connected with the heating plate 6 and controls the operation of the heating plate 6.
The valve body 2 comprises an upper valve body 21 and a lower valve body 22, a valve cavity 203 is formed by the inner walls of the upper valve body 21 and the lower valve body 22, a spring 7 is arranged between the valve core 203 and the upper valve body 21, and the valve core 4 is pressed on the water outlet 202 through the acting force of the spring 7.
The water outlet valve further comprises a manual water discharging rod 8 arranged on the lower valve body 22, the manual water discharging rod 8 is located in the water outlet 202 and stretches up and down, a positioning groove 2021 is formed in the inner wall of the lower end of the water outlet 202, a positioning ring 83 matched with the positioning groove 2021 is arranged on the manual water discharging rod 8, the upper end of the manual water discharging rod 8 is in contact with the valve core 4, and the manual water discharging rod 8 pushes the valve core 4 to move upwards and open the water outlet 202 by overcoming the acting force of the spring 7. The diameter of holding ring 83 is greater than the internal diameter of constant head tank 2021, and holding ring 83 is located constant head tank 2021 top, and under the inoperative condition of manual water bar 8, manual water bar 8 receives the automatic whereabouts of gravity influence and receives the positioning action card of constant head tank 2021 in delivery port 202, when the valve pocket accumulation is too much water and controller 1 does not control case 4 drainage, also can be through upwards promoting manual water bar 8 of releasing for case 4 is by upwards jack-up and open outlet 202 and carry out the drainage.
The valve cavity 203 is internally provided with a coil 9 which is arranged with the valve core 4 and is positioned outside the valve core 4, the controller 1 controls the connection with the coil 9 and controls the on-off of the coil 9, and the coil 9 forms an electromagnet after being electrified and controls the up-and-down movement of the valve core 4 to discharge water. The coil 9 is also provided with a magnetic conductive ring and a magnetic conductive sheet, so that a better effect is achieved, the controller 1 controls the coil 9 to form an electromagnet, the electromagnet forms magnetism and sucks the valve core 4 upwards to open the water outlet 202 for water drainage.
Example 2
The water inlet 201 water inlet device is the same as embodiment 1, and is different from the water inlet 201 water inlet device in that the water inlet 201 water inlet device further comprises a filter screen 5 located in the water inlet 201, an annular groove 2011 is formed in the inner wall of the water inlet 201, the filter screen 5 is matched with the annular groove 2011 and rotates in the annular groove 2011, a spiral diversion trench 2012 is further formed in the inner wall of the water inlet 201, the spiral diversion trench 2012 is multiple, and the spiral diversion trench 2012 is located above the annular groove 2011 and conducts water flow onto the. Through the setting of spiral guiding gutter 2012, guide rivers into the heliciform and flow downwards, the water that the heliciform descends flows strikes filter screen 5 and makes filter screen 5 rotate in annular groove 2011, and pivoted filter screen 5 can filter impurity more effectively.
Example 3
The same as embodiment 2, except that the inside of the manual water discharging rod 8 is hollow and forms a backflushing pipe 81, the backflushing pipe 81 is connected with a water tank 82, the wall surface of the manual water discharging rod 8 is provided with a plurality of backflushing holes 811 communicated with the backflushing pipe 81, and the backflushing holes 811 are scattered outward in the axial direction. In the use process of the drain valve, fine impurities pass through the filter screen 5 and are accumulated in the valve cavity 203, and through the arrangement of the backflushing pipeline 81, after a user upwards supports the manual water discharging rod 8, the manual water discharging rod 8 extends into the valve cavity 203, at the moment, a water pump on the water tank 82 is started and water is flushed into the valve cavity 203, so that the fine impurities are flushed out of the wall surface of the valve cavity 203 and discharged from the water outlet 202.
Example 4
The same as the embodiment 1, except that the upper end of the water outlet 202 is provided with an outward-expanding opening 2022, the diameter of the outward-expanding opening 2022 is gradually increased upwards, and the outward-expanding opening 2022 is further provided with a spiral drainage convex strip. The spiral drainage convex line discharges the drainage in a spiral shape, which is beneficial to the discharge of water flow.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (7)
1. Intelligence drain valve, including valve body (2), be equipped with water inlet (201) and delivery port (202), its characterized in that on valve body (2): the water level control valve is characterized in that a valve cavity (203) is further arranged in the valve body (2), a water inlet (201) and a water outlet (202) are respectively arranged at the upper end and the lower end of the valve cavity (203) and communicated with the valve cavity (203), a water level sensor (3) is installed in the valve cavity (203), the water level control valve further comprises a controller (1), the controller (1) is connected with the water level sensor (3) and receives a water level signal sent by the water level sensor (3), a valve core (4) is installed in the valve cavity (203), and the controller (1) controls the valve core (4) to move up and down; the water purifier also comprises a filter screen (5) positioned in the water inlet (201), an annular groove (2011) is formed in the inner wall of the water inlet (201), and the filter screen (5) is matched with the annular groove (2011) and rotates in the annular groove (2011); the temperature control valve further comprises a heating sheet (6) and a temperature sensor (61), wherein the heating sheet (6) and the temperature sensor (61) are installed at the bottom of the valve cavity (203), the temperature sensor (61) detects the temperature in the valve cavity (203) and forms a temperature signal to be sent to the controller (1), and the controller (1) is connected with the heating sheet (6) and controls the heating sheet (6) to work; still be equipped with spiral guiding gutter (2012) on the inner wall of water inlet (201), spiral guiding gutter (2012) have many, and spiral guiding gutter (2012) is located the top of ring channel (2011) and leads to the rivers spiral on filter screen (5).
2. The intelligent drain valve according to claim 1, wherein: the water level sensors (3) are copper needles, the water level sensors (3) are multiple, and the water level sensors (3) are uniformly distributed at the bottom of the valve cavity (203).
3. The intelligent drain valve according to claim 1, wherein: the valve body (2) comprises an upper valve body (21) and a lower valve body (22), a valve cavity (203) is formed by the inner walls of the upper valve body (21) and the lower valve body (22), a spring (7) is installed between the valve core (4) and the upper valve body (21), and the valve core (4) is tightly pressed on the water outlet (202) through the acting force of the spring (7).
4. An intelligent drain valve according to claim 3, wherein: still including installing manual water rod (8) of putting on lower valve body (22), manual water rod (8) of putting is located delivery port (202) and stretches out and draws back from top to bottom, be equipped with constant head tank (2021) on the inner wall of delivery port (202) lower extreme, be equipped with on manual water rod (8) with constant head tank (2021) complex holding ring (83), the upper end and case (4) contact of manual water rod (8) of putting, manual water rod (8) of putting pushes away case (4) and overcomes spring (7) effort rebound and open delivery port (202).
5. The intelligent drain valve according to claim 4, wherein: the manual water discharging rod (8) is hollow and forms a backflushing pipeline (81), the backflushing pipeline (81) is connected with a water tank (82), a plurality of backflushing holes (811) communicated with the backflushing pipeline (81) are formed in the wall surface of the manual water discharging rod (8), and the backflushing holes (811) are scattered outwards in the axial direction.
6. The intelligent drain valve according to claim 4, wherein: an outward-expanding opening (2022) is arranged at the upper end of the water outlet (202), the diameter of the outward-expanding opening (2022) is gradually increased upwards, and a spiral drainage convex strip is also arranged on the outward-expanding opening (2022).
7. The intelligent drain valve according to claim 1, wherein: a coil (9) which is arranged with the valve core (4) and is positioned outside the valve core (4) is arranged in the valve cavity (203), the controller (1) controls the connection with the coil (9) and controls the on-off of the coil (9), and the coil (9) forms an electromagnet after being electrified and controls the up-down movement of the valve core (4) to discharge water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530904.8A CN110332358B (en) | 2019-06-19 | 2019-06-19 | Intelligent drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530904.8A CN110332358B (en) | 2019-06-19 | 2019-06-19 | Intelligent drain valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110332358A CN110332358A (en) | 2019-10-15 |
| CN110332358B true CN110332358B (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910530904.8A Active CN110332358B (en) | 2019-06-19 | 2019-06-19 | Intelligent drain valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN110332358B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038472B (en) * | 2019-12-18 | 2024-04-05 | 天津广通汽车有限公司 | Valve group system, brake system, vehicle and control method |
| CN111746428B (en) * | 2020-07-08 | 2022-04-01 | 东风柳州汽车有限公司 | Drainage mechanism for side door of automobile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6161582A (en) * | 1998-03-30 | 2000-12-19 | Westinghouse Air Brake Company | Ball cock for railway vehicle |
| CN103090058B (en) * | 2013-02-02 | 2014-11-05 | 辽宁新风企业集团大连亿特科技有限公司 | Fuel filter automatic drain valve with operating state self-detection function |
| CN204267840U (en) * | 2014-12-03 | 2015-04-15 | 中国电子科技集团公司第十三研究所 | A kind of automatic drain valve |
| CN206319977U (en) * | 2016-12-29 | 2017-07-11 | 河北中瓷电子科技有限公司 | The Fuel filter systems valve assembly that discharges water |
| CN208169552U (en) * | 2018-04-27 | 2018-11-30 | 剑桥阀业（上海）有限公司 | A kind of electronic the needle valve |
| CN109026385B (en) * | 2018-08-28 | 2023-11-03 | 河南柴油机重工有限责任公司 | Mounting structure of engine cylinder drain valve |
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2019
- 2019-06-19 CN CN201910530904.8A patent/CN110332358B/en active Active
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| CN110332358A (en) | 2019-10-15 |
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