CN118180681A - Steel pipe welding structure and welding method thereof - Google Patents
Steel pipe welding structure and welding method thereof Download PDFInfo
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- CN118180681A CN118180681A CN202410481211.5A CN202410481211A CN118180681A CN 118180681 A CN118180681 A CN 118180681A CN 202410481211 A CN202410481211 A CN 202410481211A CN 118180681 A CN118180681 A CN 118180681A
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- steel pipe
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- pipe body
- semicircular sleeve
- sponge
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 238000003466 welding Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 26
- 230000003064 anti-oxidating effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a steel pipe welding structure and a welding method thereof, and relates to the field of steel pipe welding.
Description
Technical Field
The invention relates to the field of steel pipe welding, in particular to a steel pipe welding structure and a welding method thereof.
Background
The hydraulic steel pipe is a cold-drawn or cold-rolled precision seamless steel pipe with high dimensional precision and good surface finish for hydraulic equipment, has the advantages of no oxide layer on the inner wall and the outer wall of the steel pipe, no leakage when bearing high pressure, high precision, high finish, no deformation when cold bending, flaring, no crack when flattening and the like, and is mainly used for producing pneumatic or hydraulic products.
The traditional welded structure steel pipe directly welds the flange of the hydraulic steel pipe assembly product with the side holes of the steel pipe, and because the hydraulic steel pipe is conveyed by high-pressure high-pulse liquid, the welding seam is subjected to extremely high pressure and is easy to crack, and the welding seam is cracked and deformed under the action of high pressure or vibration, so that the steel pipe is cracked and leaked.
Therefore, it is necessary to provide a steel pipe welding structure and a welding method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a steel pipe welding structure and a welding method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a steel pipe welded structure, includes first steel pipe body and sets up perpendicularly in the second steel pipe body of first steel pipe body below, the bottom block in the first steel pipe body outside has first buckle, the top block in the second steel pipe body outside has the second buckle, the welding is carried out to one side that first steel pipe body and second steel pipe body are relative, the outside of first buckle is fixed with the cooperation piece, logical groove has been seted up on the top of cooperation piece, logical inslot has the riser, logical groove has been stretched out on the top of riser, and stretches out the end and be connected with the holding down plate, the bottom of riser is fixed with the elasticity inserted block, all be connected with reset spring between the both sides of holding down plate bottom and the top of cooperation piece, the outside of second buckle is fixed with the connecting block that corresponds with the cooperation piece, the arc slot that supplies buckle elasticity inserted block to insert has been seted up on the connecting block, the arc slot of first buckle, the arc slot of inserting connection arc is carried out to one side of holding down plate and lower side interpolation.
Preferably, the first buckle ring comprises a first semicircle sleeve and a second semicircle sleeve, the second buckle comprises a third semicircle sleeve and a fourth semicircle sleeve, a plurality of arc-shaped slots are respectively formed in the top ends of the first semicircle sleeve, the second semicircle sleeve, the third semicircle sleeve and the fourth semicircle sleeve, and middle plates are fixed in the middle of the arc-shaped slots.
Preferably, the inner chamber has all been seted up to the inside of arc picture peg, the top of arc picture peg is fixed with annotates the liquid mouth, annotate liquid mouth and inner chamber and communicate, a plurality of embedded grooves have been seted up to one side that the arc picture peg is close to first steel pipe body, and the inside in a plurality of embedded grooves is connected with first sponge and second sponge respectively.
Preferably, the plurality of embedded grooves are communicated with the inner cavity, and the first sponge and the second sponge protrude out of the corresponding embedded grooves.
Preferably, the opposite ends of the first half round sleeve and the second half round sleeve are respectively fixed with a first extension end, the opposite ends of the third half round sleeve and the fourth half round sleeve are respectively fixed with a second extension end, and fixing bolts are respectively arranged between the two corresponding first extension ends and the two corresponding first extension ends.
Preferably, the two matching blocks are arranged, the two matching blocks are respectively fixed on the outer sides of the first semicircular sleeve and the second semicircular sleeve, the two connecting blocks are arranged, and the two connecting blocks are respectively fixed on the outer sides of the third semicircular sleeve and the fourth semicircular sleeve.
Preferably, the two return springs are respectively arranged at two sides of the through groove.
Preferably, the clamping groove is communicated with the bottom end of the connecting block, and the two sides of the inside of the clamping groove are both fixed with matching parts corresponding to the elastic inserting blocks.
Preferably, the arc plugboards are fixedly connected with the corresponding lower pressing plates through connecting plates.
The invention also discloses a steel pipe welding method, which comprises the following steps: the method comprises the steps of firstly, sleeving a first buckling ring and a second buckling ring on the outer rings of a first steel pipe body and a second steel pipe body respectively, welding one sides, opposite to the first steel pipe body and the second steel pipe body, after welding, buckling the first buckling ring and the second buckling ring mutually, secondly, driving an elastic inserting block to enter the clamping groove by downwards pressing a lower pressing plate, and driving an arc inserting plate of the first buckling ring to enter the arc inserting groove of the second buckling ring downwards, so that protection of a welding seam and fixation between the first steel pipe body and the second steel pipe body are completed, and thirdly, absorbing an anti-oxidation liquid by a first sponge and a second sponge when the arc inserting plate slides downwards, smearing the anti-oxidation liquid on the welding seam, and finally staying on the welding seam to form a protective layer.
The invention has the technical effects and advantages that:
1. through the holding down plate on the first buckle ring of downwardly extrusion, make holding down plate drive riser and elasticity inserted block move down, until inside the draw-in groove on the second buckle ring is inserted to elasticity inserted block, accomplish the block, form fixedly, when simultaneously holding down plate pushes down, can drive the arc picture peg in the arc slot of first semicircle cover and move down, the bottom of arc picture peg also just smoothly enters into inside the arc slot that corresponds, the arc picture peg can protect the weld joint this moment, avoid the welding seam to expose outside, simultaneously the arc picture peg can protect the position of weld joint, after steel pipe and welding seam atress, can shift the pressure of welding seam to arc picture peg and first buckle ring and second buckle ring, reduce the pressure that the welding seam bore, increase welding seam stability, reduce the damage that vibrations brought, the life of first steel pipe body and second steel pipe body is prolonged.
2. In the actual operation of the invention, when the arc-shaped plugboard moves downwards, the first sponge and the second sponge on the inner side of the arc-shaped plugboard can rub the welding seam, the anti-oxidation liquid is injected into the inner cavity through the liquid injection port, the first sponge and the second sponge can be soaked gradually, when the first sponge and the second sponge rub with the welding seam, the anti-oxidation liquid can be smeared on the welding seam to form a protective layer, and meanwhile, the first sponge and the second sponge can stay on the welding seam to protect and shield the welding seam, so that the service life of the welding seam is prolonged, and the exposure and oxidization of the welding seam are reduced.
Drawings
Fig. 1 is a schematic view of a welded structure of a steel pipe according to the present invention.
Fig. 2 is an enlarged schematic view of the structure of fig. 1 a according to the present invention.
Fig. 3 is an enlarged schematic view of the structure of fig. 1 at B according to the present invention.
Fig. 4 is a schematic structural view of the first extension end of the present invention.
Fig. 5 is a schematic structural view of the liquid injection port of the present invention.
In the figure: 1. a first steel pipe body; 2. a second steel pipe body; 3. a first half-round sleeve; 4. a second semi-circular sleeve; 5. a third semicircular sleeve; 6. a fourth semicircular sleeve; 7. a connecting block; 8. a clamping groove; 9. an intermediate plate; 10. a mating block; 11. a through groove; 12. a lower pressing plate; 13. arc plugboards; 14. a return spring; 15. an elastic insert; 16. a connecting plate; 17. a mating portion; 18. a first extension; 19. a fixing bolt; 20. a liquid injection port; 21. a first sponge; 22. a second sponge; 23. an arc slot; 24. a vertical plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be made clear below in conjunction with the drawings in the embodiments of the present invention; it will be apparent that the embodiments described are only some, but not all, of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a steel pipe welding structure as shown in fig. 1-5, which comprises a first steel pipe body 1 and a second steel pipe body 2 vertically arranged below the first steel pipe body 1, wherein a first snap ring is clamped at the bottom end of the outer side of the first steel pipe body 1, a second snap ring is clamped at the top end of the outer side of the second steel pipe body 2, one opposite side of the first steel pipe body 1 and one opposite side of the second steel pipe body 2 are welded, the first snap ring comprises a first semicircular sleeve 3 and a second semicircular sleeve 4, the second snap ring comprises a third semicircular sleeve 5 and a fourth semicircular sleeve 6, and in the actual operation of the invention, after the first snap ring and the second snap ring are installed on the first steel pipe body 1 and the second steel pipe body 2, one opposite side of the first steel pipe body 1 and the second steel pipe body 2 is welded, and the first snap ring and the second snap ring are separated in a reserved distance when being installed, so that the welding between the first steel pipe body 1 and the second steel pipe body 2 cannot be influenced.
In actual operation of the present invention, the first half round sleeve 3 and the second half round sleeve 4 can be firmly fixed on the outer ring of the first steel pipe body 1 through the fixing bolts 19, while the opposite ends of the first half round sleeve 3 and the second half round sleeve 4 are both fixed with the first extension ends 18, and the opposite ends of the third half round sleeve 5 and the fourth half round sleeve 6 are both fixed with the second extension ends, and the fixing bolts 19 are arranged between the two corresponding first extension ends 18 and the two corresponding first extension ends 18. Tightness between the first semicircular sleeve 3 and the second semicircular sleeve 4 can be adjusted through the elastic fixing bolts 19, so that the first steel pipe body 1 with different radiuses is adapted, and practical installation and use are facilitated.
The outside of first buckle ring is fixed with cooperation piece 10, logical groove 11 has been seted up on the top of cooperation piece 10, insert riser 24 in logical groove 11, logical groove 11 has been stretched out on the top of riser 24, and stretch out the end and be connected with holding down plate 12, the bottom mounting of riser 24 has elastic insert 15, all be connected with reset spring 14 between the both sides of holding down plate 12 bottom and the top of cooperation piece 10, the outside of second buckle ring is fixed with the connecting block 7 that corresponds with cooperation piece 10, set up on the connecting block 7 and supplied elastic insert 15 male draw-in groove 8, arc slot 23 has all been seted up on the top of first buckle ring and second buckle, arc picture peg 13 is connected in the arc slot 23 interpolation of first buckle, one side of arc picture peg 13 and the side of holding down plate 12 are connected. The clamping groove 8 is communicated with the bottom end of the connecting block 7, and the two sides of the inside of the clamping groove 8 are respectively fixed with a matching part 17 corresponding to the elastic plug 15.
In the actual operation of the invention, after the first steel pipe body 1 and the second steel pipe body 2 are welded, the first snap ring and the second snap ring can be buckled with each other, the lower pressing plate 12 on the first snap ring is pressed downwards, so that the lower pressing plate 12 drives the vertical plate 24 and the elastic insert 15 to move downwards until the elastic insert 15 is inserted into the clamping groove 8 on the second snap ring, the clamping is completed, the lower pressing plate 12 is pressed downwards, the arc insert 13 in the arc slot 23 on the first semicircular sleeve 3 is driven to move downwards, after the elastic insert 15 is clamped with the connecting block 7, the bottom end of the arc insert 13 smoothly enters the arc slot 23 in the fourth semicircular sleeve 6, at this time, the arc insert 13 can protect the weld joint from being exposed outside, meanwhile, the arc insert 13 can protect the position of the weld joint, after the steel pipe and the weld joint are stressed, the pressure of the weld joint can be transferred to the arc insert 13 and the first snap ring and the second snap ring, the arc insert 13 can reduce the bearing pressure, the stability of the weld joint is reduced, the service life of the first steel pipe is prolonged, and the service life of the weld joint 1 is prolonged, and the service life of the weld joint is prolonged.
The arc slots 23 are respectively formed in the top ends of the first semicircular sleeve 3, the second semicircular sleeve 4, the third semicircular sleeve 5 and the fourth semicircular sleeve 6, the middle parts of the arc slots 23 are respectively fixed with the middle plates 9, and the middle plates 9 can enhance the internal connection strength of the arc slots 23.
The inner chamber has all been seted up to the inside of arc picture peg 13, and the top of arc picture peg 13 is fixed with annotates liquid mouth 20, annotates liquid mouth 20 and inner chamber and communicates, and a plurality of embedded grooves have been seted up to one side that arc picture peg 13 is close to first steel pipe body 1, and the inside in a plurality of embedded grooves is connected with first sponge 21 and second sponge 22 respectively, and a plurality of embedded grooves all communicate with the inner chamber, and first sponge 21 and second sponge 22 all outstanding corresponding embedded groove.
In the actual operation of the invention, when the arc-shaped plugboard 13 moves downwards, the first sponge 21 and the second sponge 22 at the inner side of the arc-shaped plugboard 13 can rub the welding seam, the oxidation preventing liquid is injected into the inner cavity through the liquid injection port 20, the oxidation preventing liquid can gradually soak the first sponge 21 and the second sponge 22, when the first sponge 21 and the second sponge 22 rub the welding seam, the oxidation preventing liquid can be smeared on the welding seam to form a protective layer, and meanwhile, the first sponge 21 and the second sponge 22 can stay on the welding seam to protect and shield the welding seam, so that the service life of the welding seam is prolonged, and the exposure and oxidation of the welding seam are reduced.
The two matching blocks 10 are arranged, the two matching blocks 10 are respectively fixed on the outer sides of the first semicircular sleeve 3 and the second semicircular sleeve 4, the two connecting blocks 7 are arranged, and the two connecting blocks 7 are respectively fixed on the outer sides of the third semicircular sleeve 5 and the fourth semicircular sleeve 6. The two matching blocks 10 and the two connecting blocks 7 are arranged, so that the strength and the stability of connection can be improved.
Two return springs 14 are respectively arranged at two sides of the through groove 11, the return springs 14 can enable the lower pressing plate 12 to pop up, when the first snap ring and the second snap ring are not buckled, the arc-shaped plugboard 13 and the vertical plate 24 can be kept at a certain position, and the influence on welding between the first steel pipe body 1 and the second steel pipe body 2 is avoided.
The arc-shaped plugboard 13 is fixedly connected with the corresponding lower pressing plate 12 through a connecting plate 16.
The invention also discloses a steel pipe welding method, which comprises the following steps:
S1, respectively sleeving a first snap ring and a second snap ring on outer rings of a first steel pipe body 1and a second steel pipe body 2, welding opposite sides of the first steel pipe body 1and the second steel pipe body 2, and after welding, mutually buckling the first snap ring and the second snap ring;
S2, by downwards pressing the lower pressing plate 12, the lower pressing plate 12 drives the elastic insert 15 to enter the clamping groove 8, and drives the arc insert plate 13 of the first clamping ring to downwards enter the arc slot 23 of the second clamping ring, so that the protection of welding seams and the fixation between the first steel pipe body 1 and the second steel pipe body 2 are completed;
S3, when the arc-shaped plugboard 13 slides downwards, the first sponge 21 and the second sponge 22 absorb the anti-oxidation liquid, and the anti-oxidation liquid is smeared on the welding seam and finally stays on the welding seam to form a protective layer.
Working principle: in the actual operation of the invention, after the first snap ring and the second snap ring are installed on the first steel pipe body 1 and the second steel pipe body 2, and the opposite sides of the first steel pipe body 1 and the second steel pipe body 2 are welded, as the distance is reserved between the first snap ring and the second snap ring when the first snap ring and the second snap ring are installed, the welding between the first steel pipe body 1 and the second steel pipe body 2 is not influenced, the tightness between the first semicircular sleeve 3 and the second semicircular sleeve 4 can be adjusted through the elastic fixing bolt 19, and the welding fixture is used for adapting to the first steel pipe bodies 1 with different radiuses, thereby being convenient for the actual installation and use.
In the actual operation of the invention, after the first steel pipe body 1 and the second steel pipe body 2 are welded, the first snap ring and the second snap ring can be buckled with each other, the lower pressing plate 12 on the first snap ring is pressed downwards, so that the lower pressing plate 12 drives the vertical plate 24 and the elastic insert 15 to move downwards until the elastic insert 15 is inserted into the clamping groove 8 on the second snap ring, the clamping is completed, meanwhile, the lower pressing plate 12 is pressed downwards, the arc insert 13 in the arc slot 23 on the first semicircular sleeve 3 is driven to move downwards, after the elastic insert 15 is completed and clamped with the connecting block 7, the bottom end of the arc insert 13 also smoothly enters the arc slot 23 in the fourth semicircular sleeve 6, at this time, the arc insert 13 can protect the welding seam from being exposed outside, meanwhile, the arc insert 13 can protect the positions of the welding seam, after the steel pipe and the welding seam are stressed, the pressure can be transferred to the arc insert 13 and the first snap ring and the second snap ring, the welding seam is reduced, the stability of the bearing pressure is reduced, the service life of the welding seam is prolonged, and the service life of the second steel pipe body 2 is prolonged, and the welding seam is prolonged.
In the actual operation of the invention, when the arc-shaped plugboard 13 moves downwards, the first sponge 21 and the second sponge 22 at the inner side of the arc-shaped plugboard 13 can rub the welding seam, the oxidation preventing liquid is injected into the inner cavity through the liquid injection port 20, the oxidation preventing liquid can gradually soak the first sponge 21 and the second sponge 22, when the first sponge 21 and the second sponge 22 rub the welding seam, the oxidation preventing liquid can be smeared on the welding seam to form a protective layer, and meanwhile, the first sponge 21 and the second sponge 22 can stay on the welding seam to protect and shield the welding seam, so that the service life of the welding seam is prolonged, and the exposure and the friction are reduced.
Claims (10)
1. The utility model provides a steel pipe welded structure, includes first steel pipe body (1) and sets up perpendicularly in second steel pipe body (2) of first steel pipe body (1) below, its characterized in that: the bottom block in the outside of first steel pipe body (1) has first buckle ring, the top block in the outside of second steel pipe body (2) has second buckle ring, one side that first steel pipe body (1) and second steel pipe body (2) are relative welds, the outside of first buckle ring is fixed with cooperation piece (10), logical groove (11) have been seted up on the top of cooperation piece (10), logical inslot (11) have riser (24), logical groove (11) are stretched out on the top of riser (24), and stretch out the end and be connected with holding down plate (12), the bottom of riser (24) is fixed with elasticity inserted block (15), all be connected with reset spring (14) between the both sides of holding down plate (12) bottom and the top of cooperation piece (10), the outside of second buckle ring is fixed with connecting block (7) that correspond with cooperation piece (10), offer on connecting block (7) and supply elasticity inserted block (15) bayonet socket (8), first buckle and second buckle top have been inserted arc-shaped slot (23), arc-shaped slot (13) are gone into to the bottom of holding down plate (24), arc-shaped slot (13) are gone into.
2. A steel pipe welding structure according to claim 1, wherein: the first buckle ring comprises a first semicircular sleeve (3) and a second semicircular sleeve (4), the second buckle comprises a third semicircular sleeve (5) and a fourth semicircular sleeve (6), a plurality of arc-shaped slots (23) are respectively formed in the top ends of the first semicircular sleeve (3), the second semicircular sleeve (4), the third semicircular sleeve (5) and the fourth semicircular sleeve (6), and middle plates (9) are respectively fixed in the middle of the arc-shaped slots (23).
3. A steel pipe welding structure according to claim 1, wherein: the inner cavity is formed in the arc-shaped inserting plate (13), the liquid injection port (20) is fixed at the top end of the arc-shaped inserting plate (13), the liquid injection port (20) is communicated with the inner cavity, a plurality of embedded grooves are formed in one side, close to the first steel pipe body (1), of the arc-shaped inserting plate (13), and a first sponge (21) and a second sponge (22) are connected to the inner parts of the embedded grooves respectively.
4. A steel pipe welding structure according to claim 3, wherein: the plurality of embedded grooves are communicated with the inner cavity, and the first sponge (21) and the second sponge (22) protrude out of the corresponding embedded grooves.
5. A steel pipe welding structure according to claim 2, wherein: the two opposite ends of the first semicircular sleeve (3) and the second semicircular sleeve (4) are respectively fixed with a first extension end (18), the two opposite ends of the third semicircular sleeve (5) and the fourth semicircular sleeve (6) are respectively fixed with a second extension end, and fixing bolts (19) are respectively arranged between the two corresponding first extension ends (18) and the two corresponding first extension ends (18).
6. A steel pipe welding structure according to claim 2, wherein: the two matching blocks (10) are arranged, the two matching blocks (10) are respectively fixed on the outer sides of the first semicircular sleeve (3) and the second semicircular sleeve (4), the two connecting blocks (7) are arranged, and the two connecting blocks (7) are respectively fixed on the outer sides of the third semicircular sleeve (5) and the fourth semicircular sleeve (6).
7. A steel pipe welding structure according to claim 1, wherein: the two return springs (14) are respectively arranged at two sides of the through groove (11).
8. A steel pipe welding structure according to claim 1, wherein: the clamping groove (8) is communicated with the bottom end of the connecting block (7), and the two sides of the inside of the clamping groove (8) are both fixed with matching parts (17) corresponding to the elastic inserting blocks (15).
9. A steel pipe welding structure according to claim 1, wherein: the arc-shaped plugboards (13) are fixedly connected with the corresponding lower pressing plates (12) through connecting plates (16).
10. A steel pipe welding method is characterized in that: a steel pipe welded structure comprising any one of claims 1 to 9, further comprising the steps of:
S1, respectively sleeving a first buckling ring and a second buckling ring on outer rings of a first steel pipe body (1) and a second steel pipe body (2), welding opposite sides of the first steel pipe body (1) and the second steel pipe body (2), and after welding, buckling the first buckling ring and the second buckling ring with each other;
S2, by downwards pressing the lower pressing plate (12), the lower pressing plate (12) drives the elastic inserting block (15) to enter the clamping groove (8), and drives the arc inserting plate (13) of the first clamping ring to downwards enter the arc inserting groove (23) of the second clamping ring, so that the protection of welding seams and the fixation between the first steel pipe body (1) and the second steel pipe body (2) are completed;
S3, when the arc-shaped inserting plate (13) slides downwards, the first sponge (21) and the second sponge (22) absorb the anti-oxidation liquid, and the anti-oxidation liquid is smeared on the welding seam and finally stays on the welding seam to form a protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410481211.5A CN118180681A (en) | 2024-04-22 | 2024-04-22 | Steel pipe welding structure and welding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410481211.5A CN118180681A (en) | 2024-04-22 | 2024-04-22 | Steel pipe welding structure and welding method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118180681A true CN118180681A (en) | 2024-06-14 |
Family
ID=91411047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410481211.5A Pending CN118180681A (en) | 2024-04-22 | 2024-04-22 | Steel pipe welding structure and welding method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118180681A (en) |
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2024
- 2024-04-22 CN CN202410481211.5A patent/CN118180681A/en active Pending
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