CN110500460B - Tensile hose sealing connector - Google Patents
Tensile hose sealing connector Download PDFInfo
- Publication number
- CN110500460B CN110500460B CN201910826600.6A CN201910826600A CN110500460B CN 110500460 B CN110500460 B CN 110500460B CN 201910826600 A CN201910826600 A CN 201910826600A CN 110500460 B CN110500460 B CN 110500460B
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- Prior art keywords
- connector
- fastening
- sleeve
- ferrule
- clamping
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Classifications
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
- F16L33/025—Hose-clips tightened by deforming radially extending loops or folds
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
- F16L33/222—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts the external piece comprising segments pressed against the hose by wedge shaped elements
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
- F16L33/223—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts the sealing surfaces being pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Abstract
The invention discloses a tensile hose sealing connector, and discloses a sealing connector which is pre-tightened by clamping and matching two parts of an inner layer and is clamped and fixed by combining an inner layer and an outer layer of fastening screw sleeves. The clamping and locking are carried out for many times, and the tensile strength is good. Its characterized in that the internal connection inserts in the lock pin arranges the outer card sleeve in, the internal connection lock pin passes through joint portion and outer card sleeve looks joint, the fastening subassembly has been put to the cover on the outer card sleeve, the both ends external diameter of outer card sleeve equals, and the middle part external diameter of outer card sleeve is greater than both ends external diameter, the portion that outer card sleeve uses the middle part external diameter great is separated for upper and lower two parts for the border, equal angle is opened on the upper portion of outer card sleeve has a plurality of expansion joints, and expansion joint one end upwards extends to outer card sleeve top, equal angle is opened on the lower part of outer card sleeve has a plurality of expansion joints, and the one end downwardly extending of expansion joint to outer card sleeve bottom, the other end of expansion joint is circular recess, the both ends of outer card sleeve are the.
Description
Technical Field
The invention discloses a tensile hose sealing connector, relates to a tensile connector for sealing and connecting hoses, and belongs to the field of pipeline engineering. In particular to a sealing connector which is pre-tightened by the clamping and matching of two parts of an inner layer and is clamped and fixed by an inner layer and an outer layer by combining a fastening screw sleeve of an outer layer.
Background
At present, in the process of fluid conduction, hose connection is mostly adopted for fluid transmission, such as medical infusion, flushing, mold cooling fluid conveying, equipment oil conveying and the like, and the hose is adopted for conveying, mainly because the hose is convenient for layout, stretching, steering and other operations, the use flexibility is improved, the existing hose connection mainly adopts a pagoda mouth and a hoop to be matched for connection, and a quick-insertion connector is also adopted for connection, in the two methods, in the connection mode of the pagoda mouth and the hoop, the pre-tightening operation of the hoop is difficult, the fastening adjusting range is large, the operation efficiency is low, axial fastening of the connection position of the hose is lacked, the quick-insertion connector is mainly clasped through a barb structure, the tightness of the joint position of the hose is poor, effective sealing can not be carried out, and after multiple times of pulling, the connection strength is reduced, and the connection stability is influenced, and the prior conveying can be carried out only after the safe communication and fastening, so that the efficiency is low.
Publication No. CN202629378U discloses a hose connector, in which a sleeve-shaped insert part is arranged in the opening area of the flow channel formed by the hose connector of the hose connector and is fixed to the connector base body of the hose connector by means of a snap-fit or snap-fit connection, said insert part can support a sealing ring for the hose connector, which bears against a flange, and/or can axially fix an RV cartridge, which is inserted into a receiving chamber of the hose connector, and the device structure uses a nut to cooperate with the sealing ring for sealing, and it is inefficient to transport the hose after fastening is completed.
Disclosure of Invention
In order to improve the situation, the tensile hose sealing connector provided by the invention is a sealing connector which is pre-tightened by clamping and matching two positions of an inner layer and is clamped and fixed by combining an inner layer and an outer layer of fastening screw sleeves. The clamping and locking are carried out for many times, and the tensile strength is good.
The invention discloses a tensile hose sealing connector, which is realized by the following steps: the invention relates to a tensile type hose sealing connector which comprises a fastening assembly, an inner connecting insert core, a clamping part and an outer clamping sleeve, wherein the inner connecting insert core is arranged in the outer clamping sleeve, the inner connecting insert core is clamped with the outer clamping sleeve through the clamping part, the fastening assembly is sleeved on the outer clamping sleeve, the outer diameters of two ends of the outer clamping sleeve are equal, the outer diameter of the middle part of the outer clamping sleeve is larger than the outer diameters of two ends, the outer clamping sleeve is divided into an upper part and a lower part by a boundary with the part with the larger outer diameter of the middle part, a plurality of expansion joints are arranged on the upper part of the outer clamping sleeve at equal angles, one end of each expansion joint extends upwards to the top end of the outer clamping sleeve, a plurality of expansion joints are arranged on the lower part of the outer clamping sleeve at equal angles, one end of each expansion joint extends downwards to the bottom end of the outer clamping sleeve, the other end of each expansion joint is a circular groove, two ends, the inner side wall of the outer clamping sleeve is provided with a rubber bump which is of a hemispherical structure, the inner connecting inserting core consists of a main connector and an auxiliary connector, the main connector is positioned in the upper part of the outer clamping sleeve, the auxiliary connector is positioned in the lower part of the outer clamping sleeve and is symmetrical with the main connector, one end of the auxiliary connector is provided with a sealing connecting plate, the end surface of the sealing connecting plate is provided with a U-shaped clamping groove, one end of the main connector is provided with a sealing connecting plate, the end surface of the sealing connecting plate is provided with a U-shaped clamping plate, the U-shaped clamping plate is clamped in the U-shaped clamping groove, the clamping position of the U-shaped clamping plate and the U-shaped clamping groove is provided with a sealing gasket, the outer side surface of the main connector is provided with a plurality of conical surfaces, the diameters of the bottom edges of the main connector are sequentially increased from top to bottom, joint portion comprises tighrening ring and fastening groove, the fastening groove is located sealing connection plate's lateral surface, the tighrening ring has been put respectively to the inboard top edge and the lower edge of the great part of outer cutting ferrule middle part external diameter, and respectively with main connector, assist the fastening groove looks joint on the connector, fastening assembly comprises main fastening swivel nut and supplementary fastening swivel nut, on the upper portion of outer cutting ferrule was arranged in to main fastening swivel nut cover, and with outer cutting ferrule looks spiro union, assist fastening swivel nut cover arrange in the lower part of outer cutting ferrule on, and with outer cutting ferrule looks spiro union, the length of expansion joint is less than the third of outer cutting ferrule total length.
Has the beneficial effects.
Firstly, the connection position can be pre-tightened through clamping of the inner layer, and fluid can be conveyed after pre-tightening.
And the inner and outer double-layer structures clamp and fix the pipe wall, so that the connection stability is good.
Thirdly, the clamping and locking are carried out for many times, and the tensile strength is good.
Drawings
FIG. 1 is a perspective view of a sealing joint for a tensile hose according to the present invention;
FIG. 2 is a perspective exploded view of a pull-resistant hose sealing joint according to the present invention;
FIG. 3 is a schematic structural diagram of a tensile hose sealing joint according to the present invention, which shows only the internal structure of the tensile hose sealing joint;
FIG. 4 is a perspective view of a main connection nozzle of the tensile hose sealing connector according to the present invention;
FIG. 5 is a perspective view of an auxiliary connection nozzle of the tensile hose sealing connector according to the present invention.
In the attached drawings
Wherein the method comprises the following steps: the clamping device comprises a fastening component 1, an internal connection plug core 2, an external clamping sleeve 3, a main fastening screw sleeve 4, a main connector 5, an auxiliary fastening screw sleeve 6, an auxiliary connector 7, a U-shaped clamping groove 8, a sealing connecting plate 9, a fastening groove 10, a fastening ring 11, a sealing gasket 12 and a U-shaped clamping plate 13.
The specific implementation mode is as follows:
the invention discloses a tensile hose sealing connector, which is realized by the following steps: the invention relates to a tensile type hose sealing connector which comprises a fastening component 1, an inner connecting insert core 2, a clamping part and an outer clamping sleeve 3, wherein the inner connecting insert core 2 is arranged in the outer clamping sleeve 3, the inner connecting insert core 2 is clamped with the outer clamping sleeve 3 through the clamping part, the fastening component 1 is sleeved on the outer clamping sleeve 3, the outer diameters of two ends of the outer clamping sleeve 3 are equal, the outer diameter of the middle part of the outer clamping sleeve 3 is larger than the outer diameters of two ends, the outer clamping sleeve 3 is divided into an upper part and a lower part by the part with the larger outer diameter of the middle part as a boundary, a plurality of expansion joints are arranged on the upper part of the outer clamping sleeve 3 at equal angles, one end of each expansion joint extends upwards to the top end of the outer clamping sleeve 3, a plurality of expansion joints are arranged on the lower part of the outer clamping sleeve 3 at equal angles, one end of each expansion joint extends downwards to the bottom end of the, the major partial length of the middle part of the outer cutting ferrule 3 is less than one seventh of the total length of the outer cutting ferrule 3, the inner side wall of the outer cutting ferrule 3 is provided with a rubber bump which is of a hemispherical structure, the inner connecting ferrule 2 consists of a main connector 5 and an auxiliary connector 7, the main connector 5 is positioned in the upper part of the outer cutting ferrule 3, the auxiliary connector 7 is positioned in the lower part of the outer cutting ferrule 3, the main connector 5 and the auxiliary connector 7 are symmetrical, one end of the auxiliary connector 7 is provided with a sealing connecting plate 9, the end surface of the sealing connecting plate 9 is provided with a U-shaped clamping plate 8, one end of the main connector 5 is provided with the sealing connecting plate 9, the end surface of the sealing connecting plate 9 is provided with the U-shaped clamping plate 13, the U-shaped clamping plate 13 is clamped in the U-shaped clamping groove 8, the clamping positions of the U-shaped clamping plate 13 and the U-shaped clamping groove 8 are provided with a, and the base diameter increases progressively from the top down in proper order, it has a plurality of circular conical surfaces to assist on the lateral surface of connector 7, and the base diameter decreases progressively from the top down in proper order, joint portion comprises tighrening ring 11 and fastening groove 10, fastening groove 10 is located the lateral surface of sealing connection board 9, tighrening ring 11 has been put respectively to the inboard top edge and the lower edge of the great majority of outer diameter in the middle part of outer cutting ferrule 3, and respectively with the fastening groove 10 looks joint on main connector 5, the assistance connector 7, fastening component 1 comprises main fastening swivel nut 4 and assistance fastening swivel nut 6, main fastening swivel nut 4 cover is arranged in on the upper portion of outer cutting ferrule 3, and with outer cutting ferrule 3 looks spiro union, assist fastening swivel nut 6 cover in the lower part of outer cutting ferrule 3, and with outer cutting ferrule 3 looks spiro union, the length of expansion joint is less than the third of outer cutting ferrule 3 total length.
As used herein, the terms "upper" and "lower" refer to the terms "upper" and "lower" in FIG. 1.
When in use, the outer cutting ferrule 3, the fastening component 1 and the inner connecting plug 2 are in a disassembled state in an initial state, when the hose is connected, the outer cutting ferrule 3 is firstly sleeved on the hose, then one end of the two hoses to be connected is respectively sleeved on the main connector 5 and the auxiliary connector 7, then the main connector 5 and the auxiliary connector 7 are clamped and connected through the matching of the U-shaped clamping plate 13 and the U-shaped clamping groove 8, then the outer cutting ferrule 3 is pushed to enable the outer cutting ferrule 3 to be sleeved on the inner connecting plug 2 formed by the combination of the main connector 5 and the auxiliary connector 7, the fastening ring 11 at the inner side of the outer cutting ferrule 3 is correspondingly clamped in the fastening groove 10, the outer cutting ferrule 3 and the inner connecting plug 2 are clamped, the fastening ring 11 has inward extrusion force on the inner connecting plug 2, and further the connecting position is pressed and pre-tightened, at the moment, fluid can be conveyed, and finally the main fastening screw sleeve 4 and the auxiliary fastening screw sleeve 6 are correspondingly sleeved on the outer cutting ferrule 3, the hose is tightly pressed and fixed by tightening the upper and lower parts of the outer clamping sleeve 3 respectively to complete the connection of the hose, the inner layer of the connector is clamped and fastened twice during the connection, the outer layer is locked finally, the inner layer and the outer layer are matched, and the integral tensile strength is better;
the outer diameters of the two ends of the outer clamping sleeve 3 are equal, and the outer diameter of the middle part of the outer clamping sleeve 3 is larger than the outer diameters of the two ends, so that the outer clamping sleeve 3 limits the main fastening threaded sleeve 4 and the auxiliary fastening threaded sleeve 6 in the middle part;
the design of the expansion joint enables the outer clamping sleeve 3 to expand to a certain degree, and then the outer clamping sleeve can compress or loosen along with the fastening component 1;
the two ends of the outer clamping sleeve 3 are respectively designed to be in a conical structure, so that the two ends of the outer clamping sleeve 3 are closed, the mouth part can be tightly pressed on the hose during connection, and better sealing is formed at the mouth part;
the design that the length of the part with larger outer diameter in the middle of the outer cutting sleeve 3 is less than one seventh of the total length of the outer cutting sleeve 3 reduces the occupied space of the limiting part of the outer cutting sleeve 3;
the inner side wall of the outer cutting sleeve 3 is provided with a rubber bump which is in a hemispherical structure design, so that the friction force between the outer cutting sleeve 3 and the hose during tightening can be increased, and the connection stability is improved;
the clamping position of the U-shaped clamping plate 13 and the U-shaped clamping groove 8 is provided with a sealing gasket 12, the clamping position of the main connector 5 and the auxiliary connector 7 is further sealed, and liquid leakage is avoided;
the outer side surface of the main connector 5 is provided with a plurality of conical surfaces, the diameters of the bottom edges of the conical surfaces are sequentially increased from top to bottom, the outer side surface of the auxiliary connector 7 is provided with a plurality of conical surfaces, the diameters of the bottom edges of the conical surfaces are sequentially decreased from top to bottom, the auxiliary connector is suitable for connection of hoses with different diameters, and the diameter of each hose is larger than that of the corresponding conical surface sleeved on the main connector 5;
the length of the expansion joint is less than one third of the total length of the outer clamping sleeve 3, so that the influence of the overlong expansion joint on the strength of the outer clamping sleeve 3 can be prevented;
the U-shaped clamping plate 13 and the U-shaped clamping groove 8 are matched with the sealing connecting plate 9, so that clamping connection can be formed between the main connector 5 and the auxiliary connector 7, and initial connection of two hoses is realized;
the fastening ring 11 is matched with the fastening groove 10, and can form pressing and pre-tightening on the connecting position of the main connector 5 and the auxiliary connector 7;
the fastening ring 11 is clamped in the fastening groove 10, the fastening assembly 1 is screwed, the connecting position can be fastened and pre-tightened in advance, fluid can be transmitted at the moment, and the fluid is not required to be conveyed after the fastening assembly 1 is finally screwed;
firstly, the U-shaped clamping plate 13 is clamped, and then the fastening ring 11 is clamped, so that the inner layer is clamped and locked twice, and the tensile strength is better;
the purposes of pre-tightening through the clamping and matching of the two parts of the inner layer and clamping and fixing of the inner layer and the outer layer by combining the fastening screw sleeve of the outer layer are achieved.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (10)
1. The utility model provides a tensile type hose sealing connection head, characterized by: the inner connecting ferrule is arranged in the outer ferrule, the inner connecting ferrule is clamped with the outer ferrule through the clamping part, the fastening component is sleeved on the outer ferrule, the outer ferrule is divided into an upper part and a lower part by taking the part with the larger middle outer diameter as a boundary, the upper part of the outer ferrule is provided with a plurality of expansion joints at equal angles, one end of each expansion joint extends upwards to the top end of the outer ferrule, the lower part of the outer ferrule is provided with a plurality of expansion joints at equal angles, one end of each expansion joint extends downwards to the bottom end of the outer ferrule, the other end of each expansion joint is a circular groove, the inner connecting ferrule is composed of a main connector and an auxiliary connector, the main connector is positioned in the upper part of the outer ferrule, the auxiliary connector is positioned in the lower part of the outer ferrule, the main connector and the auxiliary connector are symmetrical, one end of the auxiliary connector is provided with a sealing connecting plate, the end face of the sealing connecting plate is provided with a U-shaped clamping groove, one end of the main connector is provided with the sealing connecting plate, the end face of the sealing connecting plate is provided with a U-shaped clamping plate, the U-shaped clamping plate is clamped in the U-shaped clamping groove, a sealing gasket is arranged at the clamping position of the U-shaped clamping plate and the U-shaped clamping groove, the clamping part consists of a fastening ring and a fastening groove, the fastening groove is positioned on the outer side face of the sealing connecting plate, the fastening ring is respectively arranged at the upper edge and the lower edge of the inner side of the larger outer diameter part of the middle part of the outer clamping sleeve and is respectively clamped with the fastening grooves on the main connector and the auxiliary connector, the fastening assembly consists of a main fastening screw sleeve and an auxiliary fastening screw sleeve, the main fastening screw sleeve is sleeved on the upper part of the outer clamping sleeve and is in threaded connection with the outer clamping sleeve, and the.
2. The sealed connector of claim 1, wherein the outer diameters of the two ends of the outer sleeve are equal, and the outer diameter of the middle portion of the outer sleeve is larger than the outer diameters of the two ends.
3. The sealed connector of claim 2, wherein the two ends of the outer sleeve are respectively tapered.
4. A tensile hose sealing joint according to any one of claims 1 to 3, wherein the length of the portion of the outer diameter of the middle part of the outer ferrule that is larger is less than one seventh of the total length of the outer ferrule.
5. The sealed connector of claim 4, wherein the rubber bumps are disposed on the inner sidewall of the outer sleeve, and the rubber bumps are of a hemispherical structure.
6. The sealed joint of tensile hose according to claim 1, wherein the length of the expansion joint is less than one third of the total length of the outer clamping sleeve.
7. The sealed joint of tensile hose according to claim 1 or 6, wherein the expansion joint enables the outer clamping sleeve to expand and contract to a certain extent, so as to compress or release along with the fastening component.
8. The tensile hose sealing connector according to claim 1, wherein the U-shaped clamping plate and the U-shaped clamping groove are matched with the sealing connecting plate, so that the main connector and the auxiliary connector can be clamped and connected to each other, and initial connection of two hoses is realized.
9. The sealed connector of claim 1, wherein the fastening ring is engaged with the fastening groove to form a compressive pretension at the connection position between the main connector and the auxiliary connector.
10. The sealed connector of claim 1, wherein the outer surface of the main connector has a plurality of conical surfaces, and the diameters of the bottom edges of the conical surfaces increase from top to bottom, and the outer surface of the auxiliary connector has a plurality of conical surfaces, and the diameters of the bottom edges of the conical surfaces decrease from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826600.6A CN110500460B (en) | 2019-09-03 | 2019-09-03 | Tensile hose sealing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826600.6A CN110500460B (en) | 2019-09-03 | 2019-09-03 | Tensile hose sealing connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110500460A CN110500460A (en) | 2019-11-26 |
| CN110500460B true CN110500460B (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826600.6A Active CN110500460B (en) | 2019-09-03 | 2019-09-03 | Tensile hose sealing connector |
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| Country | Link |
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| CN (1) | CN110500460B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174012B (en) * | 2020-03-14 | 2021-07-30 | 绍兴上虞中塘电器五金厂 | Detachable pipe plug |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147035A (en) * | 2010-02-10 | 2011-08-10 | 上海龙胜实业有限公司 | Fast connection pipe joint structure |
| WO2013010191A1 (en) * | 2011-07-12 | 2013-01-17 | Livizone (Pty) Ltd | Pipe connector fittings and method |
| KR101459749B1 (en) * | 2012-10-04 | 2014-11-12 | 석호실 | Washing Machine Hose and Hose, for both the connector |
| CN103629463A (en) * | 2013-12-16 | 2014-03-12 | 文登鸿通管材有限公司 | Connecting structure for multi-layer continuous composite tubes |
| CN104913142A (en) * | 2015-06-23 | 2015-09-16 | 苏州市瑞晟医疗器械有限公司 | Fast connector of medical flexible pipes |
| CN206656059U (en) * | 2017-04-18 | 2017-11-21 | 李泳溢 | The super heatproof of double containment withholds hose coupling |
| CN108662327B (en) * | 2018-04-30 | 2020-09-25 | 宁海开泰管业科技有限公司 | Quick locking and sealing device for hose |
| CN208750233U (en) * | 2018-08-31 | 2019-04-16 | 深圳亿和环保有限公司 | A kind of plastics movable joint structure |
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2019
- 2019-09-03 CN CN201910826600.6A patent/CN110500460B/en active Active
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| CN110500460A (en) | 2019-11-26 |
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