CN112855677A - Efficient high-strength channel steel fixing method, fixing piece and fixing assembly - Google Patents
Efficient high-strength channel steel fixing method, fixing piece and fixing assembly Download PDFInfo
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- CN112855677A CN112855677A CN202011486092.0A CN202011486092A CN112855677A CN 112855677 A CN112855677 A CN 112855677A CN 202011486092 A CN202011486092 A CN 202011486092A CN 112855677 A CN112855677 A CN 112855677A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 195
- 239000010959 steel Substances 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
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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
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
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Abstract
The invention discloses a high-efficiency high-strength channel steel fixing method which comprises two channel steels vertically arranged in a plane, namely a first channel steel and a second channel steel; a plurality of first through holes with a spacing are arranged on one side surface of two adjacent side surfaces of the channel steel along the length direction of the channel steel, a plurality of second through holes with b spacing are arranged on the other side surface of the channel steel along the length direction of the channel steel, and a is not equal to b; the first channel steel and the second channel steel are fixed through a fixing piece, the fixing piece comprises a third through hole matched with the first through hole and a fourth through hole matched with the second through hole, the distance between every two adjacent third through holes is b, and the distance between every two adjacent fourth through holes is a; the fixing piece and the first channel steel and/or the second channel steel are connected through at least one bolt penetrating through the third through hole and the first through hole of the first channel steel and/or the second channel steel, and the fixing piece and the first channel steel and/or the second channel steel are connected through at least one bolt penetrating through the fourth through hole and the second through hole of the first channel steel and/or the second channel steel.
Description
Technical Field
The invention relates to the technical field of channel steel fixing, in particular to a high-efficiency and high-strength channel steel fixing piece, a fixing assembly and a fixing method.
Background
Fixed bolt fastening that often adopts between present market channel-section steel and the mounting, but interval between two trompils on interval on the channel-section steel on the market and the mounting equals, and the channel-section steel is the interval between two trompils with the regulation precision of mounting when adjusting, because channel-section steel mechanical strength's influence, interval between the trompil can not be opened too little, if open greatly, then adjust the precision too big, be unfavorable for installation mounting and channel-section steel.
Disclosure of Invention
The invention provides a high-efficiency high-strength channel steel fixing method, a fixing piece and a fixing assembly, and aims to solve the problems.
According to a first aspect of the embodiment of the application, a method for fixing high-efficiency and high-strength channel steel is provided, wherein two channel steels which are vertically abutted or intersected by extension lines in a plane are respectively a first channel steel and a second channel steel; a plurality of first through holes with a spacing are arranged on one side surface of two adjacent side surfaces of the channel steel along the length direction of the channel steel, a plurality of second through holes with b spacing are arranged on the other side surface of the channel steel along the length direction of the channel steel, and a is not equal to b;
fixing the first channel steel and the second channel steel through a fixing piece, wherein the fixing piece comprises a third through hole matched with the first through hole and a fourth through hole matched with the second through hole, the distance between every two adjacent third through holes is b, and the distance between every two adjacent fourth through holes is a;
the fixing piece and the first channel steel and/or the second channel steel are fixed through at least one bolt penetrating through a third through hole and the first through hole of the first channel steel and/or the second channel steel, and the fixing piece and the first channel steel and/or the second channel steel are fixed through at least one bolt penetrating through a fourth through hole and the second through hole of the first channel steel and/or the second channel steel.
In the method for fixing the high-efficiency high-strength channel steel, the first through holes of the two channel steel are on the same plane, the fixing piece comprises a first surface parallel to the plane and at least one second surface perpendicular to the first surface, the third through hole is formed in the first surface, and the fourth through hole is formed in the second surface.
In the high-efficiency high-strength channel steel fixing method, the number of the fixing pieces is two; the first surfaces of the two fixing pieces are opposite to each other; the second face of one of the fasteners faces the other fastener.
In the high-efficiency high-strength channel steel fixing method, the first surface is L-shaped; the first face comprises two identical first and second sub-faces.
In the method for fixing the high-efficiency high-strength channel steel, a is 1.5 b.
In the method for fixing the high-efficiency high-strength channel steel, a is 30mm, and b is 20 mm.
According to a second aspect of the embodiments of the present application, there is provided a fixing element for implementing the above-mentioned method for fixing a high-efficiency and high-strength channel steel, including a first vertical plate, a second vertical plate, and a vertical plate; the first vertical plate and the second vertical plate are connected in a right angle mode on the same plane, and the vertical plate is perpendicular to the plane; the vertical plate is connected to one side edge of the first vertical plate or the second vertical plate in the length direction; the vertical plate comprises a plurality of first through holes arranged along the length direction of the vertical plate; the first vertical plate comprises a plurality of second through holes distributed along the length direction of the first vertical plate, and the second vertical plate comprises a plurality of second through holes distributed along the length direction of the second vertical plate.
In the efficient high-strength channel steel fixing piece, the distance between every two first through holes is 1.5 times that between every two second through holes.
In the efficient high-strength channel steel fixing piece, the vertical plate is vertically connected to the inner side edge of the first vertical plate or the second vertical plate.
According to a third aspect of the embodiments of the present application, there is provided an efficient high-strength channel fixing assembly, including two efficient high-strength channel fixing elements as described above, wherein a first riser of one of the fixing elements is disposed opposite to a second riser of another one of the fixing elements, and the vertical plate of one of the fixing elements is disposed toward the other one of the fixing elements.
The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application designs a high-efficient high strength channel-section steel fixing method, mounting and fixed subassembly, and it cooperates through the hole of different intervals on mounting and the channel-section steel to the regulation precision between mounting and the channel-section steel has been promoted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a diagram of an application scenario in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural view of a fixing member according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a fixing assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a channel steel according to an embodiment of the present invention.
Description of reference numerals:
100. a channel steel fixing piece; 10. a first vertical plate; 11. a third through hole; 20. a second vertical plate; 30. a vertical plate; 31. a fourth via hole; 40. a positioning boss portion; 200. channel steel; 201. a first through hole; 202. a second through hole; 203. and (4) a groove part.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1 to 4, the invention discloses a method for fixing a high-efficiency and high-strength channel steel, which comprises steps S101 to S103.
S101, two channel steels which are vertically abutted or intersected by extension lines in a plane are respectively a first channel steel and a second channel steel; a plurality of first through holes 201 with a as a distance are arranged on one side face of two adjacent side faces of the channel steel along the length direction of the channel steel, a plurality of second through holes 202 with b as a distance are arranged on the other side face of the channel steel along the length direction of the channel steel, and a is not equal to b.
Specifically, as shown in fig. 1, a first channel steel and a second channel steel are perpendicularly connected, through holes are formed in the side faces of the first channel steel and the second channel steel, a plurality of first through holes 201 and a plurality of second through holes 202 are formed in two adjacent side faces of the channel steel, the first through holes are evenly distributed along the direction of the length of the channel steel, and the distance between every two adjacent first through holes is a. The second through holes are evenly distributed along the length direction of the channel steel, and the distance between every two adjacent second through holes is b.
S102, fixing the first channel steel and the second channel steel through a fixing piece, wherein the fixing piece comprises a third through hole 11 matched with the first through hole and a fourth through hole 31 matched with the second through hole, the distance between every two adjacent third through holes is b, and the distance between every two adjacent fourth through holes is a.
Specifically, the fixing piece is used for fixing a first channel steel and a second channel steel, the fixing piece comprises a third through hole and a fourth through hole, the first through hole is matched with the third through hole, the fourth through hole is matched with the second through hole, the distance between every two adjacent third through holes is b, and the distance between every two adjacent fourth through holes is a.
S103, at least one bolt penetrates through a third through hole and a first through hole of the first channel steel and/or the second channel steel to fix the fixing piece and the first channel steel and/or the second channel steel, and at least one bolt penetrates through a fourth through hole and a second through hole of the first channel steel and/or the second channel steel to fix the fixing piece and the first channel steel and/or the second channel steel.
Specifically, the method fixes the fixing member 100 and the two channel steels 200 into a whole by bolts. And at least one bolt penetrates through the third through hole and is connected with the first through hole of the first channel steel and/or the second channel steel through the fixing piece and the first through hole of the first channel steel and/or the second channel steel. Can set up one row of third through-hole on the mounting, also can set up two rows of third through-holes, when the cooperation, aim at the first through-hole on the channel-section steel with at least one in the third through-hole on the mounting, fix mounting and channel-section steel together through the bolt. And at least one bolt penetrates through the fourth through hole and is connected with the second through hole of the first channel steel and/or the second channel steel through the fixing piece and the first channel steel and/or the second channel steel. Can set up on the mounting at row fourth through-hole, also can set up two rows of fourth through-holes, align at least one in the fourth through-hole on the mounting with the second through-hole on the channel-section steel, fix mounting and two channel-section steels together through at least one bolt.
The current common fixing mode is that holes with the same spacing are matched (namely the spacing of the holes on the fixing piece is e, and the spacing of the matching holes on the channel steel is also e), and the precision of the adjusting holes between the fixing piece and the channel steel is set to be the spacing between the two holes. And this application matches the setting through the through-hole of different intervals, uses a to match as the second through-hole of interval with b on the fourth through-hole of interval and the channel-section steel again on the mounting, uses b to match as the first through-hole of interval with a on the third through-hole of interval and the channel-section steel on fixed. The precision of the adjusting hole between the fixing piece and the channel steel is set to be a-b (in this case, a > b; when a < b, the precision is a-b). The number of the holes formed in the channel steel can be reduced, and therefore the mechanical strength of the channel steel is improved.
In an alternative embodiment, the first through holes of the two channels are in the same plane, and the fixing member includes a first face 10A and at least one second face 30A, the first face being parallel to the plane in which the first through holes of the channels are located, and the second face being perpendicular to the second face. The third through hole is arranged on the first surface, and the fourth through hole is arranged on the second surface. Specifically, two channel-section steels are connected perpendicularly on same plane, the plane at two channel-section steels's first through-hole place is parallel with the plane at two channel-section steels places, the third through-hole sets up on first face, the third through-hole is arranged along the direction of two channel-section steels 200 length, pass one of them row of third through-hole and first through-hole through at least one bolt and be connected one of them channel-section steels and mounting, pass one of the third through-hole and first through-hole on another row through at least one bolt and be connected another channel-section steel with the mounting, at last rethread at least one bolt passes fourth through-hole and second through-hole and links together mounting and two channel-section steels. In an alternative embodiment, the first surface is L-shaped, and the first surface includes a first sub-surface and a second sub-surface connected to each other, wherein one row of the third through holes is disposed on the first sub-surface, and the other row of the third through holes is disposed on the second sub-surface, and the first sub-surface and the second sub-surface are the same.
As shown in fig. 1 and 3, in an alternative embodiment, the number of the fixing members is two, and the first faces of the two fixing members are opposite to each other; the second face of one fastener is facing the other fastener. Specifically, this application is fixed integrative with two channel-section steels through two mountings. The first faces of the two fixing pieces are arranged oppositely, and the second face of one fixing piece is arranged towards the other fixing piece. In this embodiment, pass the third through-hole on the first sub-face on the first face of two mountings and the first through-hole on the channel-section steel through at least one bolt and be connected a channel-section steel with the mounting, pass the third through-hole on the second sub-face on the first face of mounting and the first through-hole on another channel-section steel through at least one bolt and be connected another channel-section steel with the mounting. And the bolt passes through a fourth through hole on the second surface and a second through hole on the channel steel, and the bolt is fixed with the two channel steels. This application is connected channel-section steel and mounting through at least four bolts on three looks vertically plane, and the degree of freedom in X, Y, Z three directions all is restricted promptly, and its stability is high to simple to operate.
In an alternative embodiment, a ═ 1.5 b. I.e. the fixture and channel are adjusted with an accuracy of 0.5 b. In an alternative embodiment, a is 30mm and b is 20 mm. Specifically, the interval between the first through holes on the channel steel is 30mm, the interval between the second through holes is 20mm, the interval between the third through holes on the fixing member is 20mm, the interval between the fourth through holes on the fixing member is 30mm, and the fourth through holes are matched with the first through holes through the third through holes and the second through holes, so that the adjustment precision between the fixing member and the channel steel is 10 mm. If adopt the hole cooperation that the interval is the same on the market, to reach 10mm precision, must set up the interval between two holes to 10mm, the channel-section steel is directly damaged by dashing even like this, and the mechanical strength of the channel-section steel of this application then strengthens greatly.
Referring to fig. 1-4, the invention discloses a high-efficiency high-strength channel steel fixing piece 100, which is used for being matched with another high-efficiency high-strength channel steel fixing piece to fix channel steel. This mounting includes first riser 10, second riser 20 and vertical plate 30, and first riser and second riser setting are on same plane to first riser and second riser are the right angle and connect. The vertical plate is perpendicular to the plane where the first vertical plate and the second vertical plate are located. The vertical plate is connected to one side of the length direction of the first vertical plate or the second vertical plate, the vertical plate comprises a plurality of fourth through holes 31 distributed along the length direction of the vertical plate, the first vertical plate comprises a plurality of third through holes 11 distributed along the length direction of the first vertical plate, and the second vertical plate comprises a plurality of third through holes 11 distributed along the length direction of the second vertical plate.
Specifically, referring to fig. 2, the fixing element of this embodiment is used with another same fixing element, the first vertical plate of the first fixing element is disposed opposite to the second vertical plate of the second fixing element, the second vertical plate of the first fixing element is disposed opposite to the first vertical plate of the first fixing element, the vertical plate of the first fixing element is disposed toward the second fixing element, and the vertical plate of the second fixing element is disposed toward the first fixing element. That is, the first fixing member and the second fixing member form two receiving cavities for receiving the channel steel 200. The two channel steels are respectively placed in the containing cavity, and the channel steels and the fixing piece are fixed together through bolts. In this embodiment, every channel-section steel all with two at least bolt fastening to the bolt is fixed from two directions, has ensured the fixed stability between mounting and the channel-section steel. Therefore every channel-section steel has all restricted the degree of freedom from two directions, and has repeated an orientation in two directions, passes the bolt of first riser and second riser promptly, consequently this application fixes the channel-section steel through two sets of mountings, and this application restricts the degree of freedom of channel-section steel through three mutually perpendicular's orientation, the degree of freedom of X, Y, Z three directions promptly, and its stability is high to simple to operate.
In an alternative embodiment, the distance between every two fourth through holes is 1.5 times the distance between every two third through holes.
Specifically, the fixture in this embodiment needs to be fitted with a channel 200 with a hole. The hole of the channel steel is matched with the first through hole and the second through hole. When the channel-section steel is C shaped steel, the interval between the trompil on the diapire of C shaped steel is the same with the interval between per two second through-holes, and the interval between the trompil on the C shaped steel lateral wall is the same with the interval between per two first through-holes. When mounting and C shaped steel cooperate, the trompil on first through-hole on the mounting and the C shaped steel lateral wall matches, and the trompil on second through-hole on the mounting and the C shaped steel diapire wall matches, and when mounting and C shaped steel cooperate promptly, the interval in the hole of mutually supporting is inequality. This fit can be adjusted with an accuracy of 0.5 times the distance between every two second through holes.
In some embodiments, the distance between every two third through holes is 30mm, and the distance between every two first through holes is 20 mm. Therefore, the upper part and the lower part can be fixed by respectively penetrating a bolt at intervals of 10 mm. And the channel steel can also be provided with scales, and one scale is 10mm, so that punching is convenient. In this embodiment, the diameter of the third through hole and the diameter of the first through hole are both set to 10 mm.
In some alternative embodiments, a vertical plate is connected to an inside edge of the first riser or the second riser.
This application still protects a high-efficient high strength channel-section steel fixed subassembly, and this fixed subassembly includes two foretell high-efficient high strength channel-section steel mountings. The first vertical plate of one of the fixing pieces is opposite to the second vertical plate of the other fixing piece. The vertical plate of one of the fixing parts is arranged towards the other fixing part, that is to say the two fixing components are arranged oppositely, and the two fixing parts form two accommodating cavities for accommodating the channel steel. And finally, the two channel steels are fixed by penetrating the fixing piece and the channel steels through bolts.
This application cooperation channel-section steel 200 that above-mentioned mounting used can be for C shaped steel or square steel, and when the channel-section steel was C shaped steel, two relative sides of channel-section steel were provided with a plurality of first through-holes 201, and the bottom surface of channel-section steel is provided with a plurality of second through-holes 202. When the fixing piece is installed, the vertical plate on the fixing piece covers the notch of the C-shaped steel, and finally the fixing piece and the C-shaped steel are fixed through the bolt penetrating through the fixing piece. When the channel-section steel is square steel, wherein two opposite side of square steel are provided with a plurality of sixth through-hole portions, and two other opposite side of square steel set up a plurality of seventh through-hole portions.
In an alternative embodiment, the channel steel is C-shaped steel, the side surface of the channel steel is provided with a groove portion 203, and the first through hole and the second through hole are arranged at the bottom wall of the groove portion. Or the channel steel is square steel, the four side surfaces of the channel steel are provided with groove parts, and the sixth through hole part or the seventh through hole part is arranged on the bottom wall of the sunken part. This mechanical strength with groove portion channel-section steel is higher to all can set up location platform portion on vertical plate, the first riser and the second riser on the mounting that uses with this channel-section steel cooperation, in placing groove portion with location platform portion 40 when the installation, aim at the trompil again, made things convenient for the installation.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A high-efficiency high-strength channel steel fixing method is characterized by comprising the following steps:
two channel steels which are vertically abutted or intersected by extension lines in a plane are respectively a first channel steel and a second channel steel; a plurality of first through holes with a spacing are arranged on one side surface of two adjacent side surfaces of the channel steel along the length direction of the channel steel, a plurality of second through holes with b spacing are arranged on the other side surface of the channel steel along the length direction of the channel steel, and a is not equal to b;
fixing the first channel steel and the second channel steel through a fixing piece, wherein the fixing piece comprises a third through hole matched with the first through hole and a fourth through hole matched with the second through hole, the distance between every two adjacent third through holes is b, and the distance between every two adjacent fourth through holes is a;
the fixing piece and the first channel steel and/or the second channel steel are fixed through at least one bolt penetrating through a third through hole and the first through hole of the first channel steel and/or the second channel steel, and the fixing piece and the first channel steel and/or the second channel steel are fixed through at least one bolt penetrating through a fourth through hole and the second through hole of the first channel steel and/or the second channel steel.
2. The method as claimed in claim 1, wherein the first through holes of the two channels are in the same plane, the fixing member includes a first surface parallel to the plane and at least a second surface perpendicular to the first surface, the third through hole is disposed on the first surface, and the fourth through hole is disposed on the second surface.
3. The method for fixing the channel steel with high efficiency and high strength as claimed in claim 2, wherein the number of the fixing pieces is two; the first surfaces of the two fixing pieces are opposite to each other; the second face of one of the fasteners faces the other fastener.
4. The method for fixing the high-efficiency and high-strength channel steel as claimed in claim 2, wherein the first surface is L-shaped; the first face comprises two identical first and second sub-faces.
5. The method for fixing the channel steel with high efficiency and high strength as claimed in claim 1, wherein a is 1.5 b.
6. The method as claimed in claim 5, wherein a is 30mm and b is 20 mm.
7. A fixing member for realizing a high-efficiency high-strength channel fixing method according to any one of claims 1 to 6, characterized by comprising: a first vertical plate, a second vertical plate and a vertical plate; the first vertical plate and the second vertical plate are connected in a right angle mode on the same plane, and the vertical plate is perpendicular to the plane; the vertical plate is connected to one side edge of the first vertical plate or the second vertical plate in the length direction; the vertical plate comprises a plurality of fourth through holes which are arranged along the length direction of the vertical plate; the first vertical plate comprises a plurality of third through holes distributed along the length direction of the first vertical plate, and the second vertical plate comprises a plurality of third through holes distributed along the length direction of the second vertical plate.
8. The fixture according to claim 7, wherein the distance between every two fourth through holes is 1.5 times the distance between every two third through holes.
9. The fastener of claim 7, wherein the vertical plate is connected vertically to an inner edge of the first riser or the second riser.
10. An efficient high strength channel fastener assembly comprising two fasteners as claimed in any one of claims 7 to 9, wherein a first riser of one of said fasteners is disposed opposite a second riser of the other of said fasteners, and wherein said vertical plate of one of said fasteners is disposed towards the other of said fasteners.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486092.0A CN112855677A (en) | 2020-12-16 | 2020-12-16 | Efficient high-strength channel steel fixing method, fixing piece and fixing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486092.0A CN112855677A (en) | 2020-12-16 | 2020-12-16 | Efficient high-strength channel steel fixing method, fixing piece and fixing assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112855677A true CN112855677A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011486092.0A Pending CN112855677A (en) | 2020-12-16 | 2020-12-16 | Efficient high-strength channel steel fixing method, fixing piece and fixing assembly |
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| Country | Link |
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| CN (1) | CN112855677A (en) |
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- 2020-12-16 CN CN202011486092.0A patent/CN112855677A/en active Pending
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