CN220624881U - Furnace mouth sealing device of heating furnace - Google Patents
Furnace mouth sealing device of heating furnace Download PDFInfo
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- CN220624881U CN220624881U CN202322272104.5U CN202322272104U CN220624881U CN 220624881 U CN220624881 U CN 220624881U CN 202322272104 U CN202322272104 U CN 202322272104U CN 220624881 U CN220624881 U CN 220624881U
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- 238000007789 sealing Methods 0.000 title claims abstract description 83
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 238000004321 preservation Methods 0.000 claims abstract description 51
- 230000033228 biological regulation Effects 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000002457 bidirectional effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The application relates to the technical field of heating furnace sealing, and discloses a heating furnace mouth sealing device, including the furnace body inlet pipe, furnace body inlet pipe top fixedly connected with heat preservation frame, heat preservation frame outside fixedly connected with backup pad, be provided with regulation and control mechanism on the heat preservation frame. The regulating mechanism comprises two auxiliary frames. Through regulation and control mechanism's design, sealed apron can close sealedly to the heat preservation frame top, and the sealing block then can seal the opening of heat preservation frame bottom, when throwing the material, the material is at first got into inside the heat preservation frame, the sealing block still seals the furnace body inlet pipe this moment, after the material adds the completion, then seal apron is pressed down, the sealing block is relieved simultaneously and is sealed to the buckle on the heat preservation frame, then the material can get into through the furnace body inlet pipe this moment and add, with this realization whole material in-process all can not communicate furnace body inlet pipe and external world, thereby lead to the condition that the heat gives off.
Description
Technical Field
The application relates to the technical field of heating furnace sealing, in particular to a heating furnace mouth sealing device.
Background
The heating furnace is a special device for heating the product materials and the produced workpieces, and is different from the drying device, the main purpose of the heating furnace is not to heat the general materials, but to heat the metal products at high temperature without oxidation or with less oxidation so as to further deeply process the metal products, and the variety of the heating furnace is increasing along with the development of technology.
Patent network publication number CN215481122U discloses a sealed heating furnace mouth structure, which comprises a heating furnace, wherein a furnace mouth is arranged on the heating furnace, a lifting structure is arranged on the heating furnace, a driving structure is arranged on the lifting structure and is connected with the lifting structure, a telescopic structure is arranged on the lifting structure, a sealing structure is arranged on the telescopic structure, and the sealing structure can be clamped on the inner wall of the furnace mouth; the lifting structure comprises a first lifting assembly and a second lifting assembly, the lifting structure is enabled to move to the furnace mouth through the driving structure, and the sealing structure is clamped at the furnace mouth through the telescopic structure, so that the sealing performance is improved, the lifting structure also has the function of sealing and opening the furnace mouth mechanically, and convenience can be brought to workers, and the labor intensity can be reduced.
The sealing performance is improved through the mode that the sealing structure is clamped at the furnace mouth through the telescopic structure, but in the actual work of the heating furnace, the situation that materials are needed to be added in the middle of heating possibly occurs, the furnace mouth is required to be opened in the process of adding the materials, and heat in the heating furnace can be rapidly emitted to the outside in the process of opening the furnace mouth, so that the heating efficiency of an internal heating workpiece can be influenced.
Disclosure of Invention
In order to solve the problems, the application provides a furnace mouth sealing device of a heating furnace.
The application provides a heating furnace mouth sealing device adopts following technical scheme:
the utility model provides a heating furnace mouth sealing device, includes the furnace body inlet pipe, furnace body inlet pipe top fixedly connected with heat preservation frame, heat preservation frame outside fixedly connected with backup pad, be provided with regulation and control mechanism on the heat preservation frame.
The regulating mechanism comprises two auxiliary frames, the two auxiliary frames are respectively and fixedly connected to the left side and the right side of a furnace body feeding pipe, one auxiliary frame is internally and fixedly connected with a motor, the motor is fixedly connected with a threaded rod through an output shaft, the threaded rod penetrates through the heat insulation frame and one side wall of the other auxiliary frame respectively, the threaded rod is connected with the heat insulation frame and the auxiliary frame through sealing bearings respectively, a sealing block is arranged inside the heat insulation frame and is matched with the heat insulation frame, a sealing cover plate is arranged at the top of the heat insulation frame, a U-shaped plate is arranged at the top of the supporting plate, a bidirectional threaded rod is rotationally connected to the inner side of the U-shaped plate, and the bidirectional threaded rod extends out of the U-shaped plate.
Through adopting above-mentioned technical scheme, sealed apron can close sealedly to the heat preservation frame top, and the sealing block then can seal the opening of heat preservation frame bottom, when throwing the material, the material is at first got into inside the heat preservation frame, the sealing block still seals the furnace body inlet pipe this moment, after the material adds the completion, then seal the sealing apron down, the sealing block is relieved simultaneously and is gone up the sealing of buckle to the heat preservation frame, then the material can get into through the furnace body inlet pipe this moment and add, with this realization whole throw the material in-process all can not communicate furnace body inlet pipe and external world, thereby lead to the condition of heat giving off.
Preferably, the outside first screw thread piece that is provided with of threaded rod, first screw thread piece top is through movable hinge swing joint has first push plate, and first push plate top and sealing block bottom are through movable hinge swing joint, the inside fixedly connected with diaphragm of heat preservation frame, diaphragm bottom fixedly connected with spacing telescopic link, spacing telescopic link bottom and sealing block top fixed connection.
Through adopting above-mentioned technical scheme, can drive first screw thread piece after the threaded rod rotates and remove.
Preferably, two second thread blocks are arranged outside the bidirectional threaded rod, the bottoms of the second thread blocks are movably connected with second pushing plates through movable hinge bases, the bottoms of the second pushing plates are movably connected with the top of the sealing cover plate through movable hinge bases, annular grooves are formed in the bottoms of the sealing cover plate, and the annular grooves are matched with the heat preservation frame.
By adopting the technical scheme, the directions of threads at two ends of the bidirectional threaded rod are opposite.
Preferably, the spout has all been seted up on the inboard both sides of U-shaped board, the equal fixedly connected with slider in sealed apron both sides, the slider extends into the spout inside and with spout assorted, two movable grooves have been seted up in the backup pad, two movable blocks of U-shaped board bottom fixedly connected with, movable block run through the movable groove and with movable groove assorted, movable block front side fixedly connected with electric telescopic handle, electric telescopic handle fixedly connected with is inside the movable groove.
By adopting the technical scheme, the sliding block can flexibly move in the sliding groove.
Preferably, the regulation and control mechanism includes drive assembly, and drive assembly includes two rectangle frames, and two-way threaded rod extends into one of them rectangle frame inside and rotates with the rectangle frame to be connected, rotates between two rectangle frames to be connected with flexible transfer line, and flexible transfer line extends into two rectangle frame inside respectively, and flexible transfer line rotates with two rectangle frames respectively to be connected, flexible transfer line outside fixedly connected with two first bevel gears, two first bevel gears set up in two rectangle frame inside respectively.
By adopting the technical scheme, the telescopic transmission rod is used for transmission, and the bidirectional threaded rod is driven to rotate.
Preferably, one side of one rectangular frame is provided with a round rod, the round rod extends into the inside of the rectangular frame and is rotationally connected with the rectangular frame, a second bevel gear is fixedly connected to the outside of the bidirectional threaded rod, a third bevel gear is fixedly connected to the outside of the round rod, the second bevel gear and the third bevel gear are respectively arranged on one side of the two first bevel gears, the second bevel gear and the third bevel gear are respectively meshed with the two first bevel gears, two bottom of the rectangular frame are fixedly connected with L-shaped plates, one side of each L-shaped plate is fixedly connected with one side of each U-shaped plate, and the other side of each L-shaped plate is fixedly connected with one side of each supporting plate.
By adopting the technical scheme, the L-shaped plate provides support for the fixed frame.
Preferably, the threaded rod is fixedly connected with a first belt pulley, the round rod is fixedly connected with a second belt pulley, a belt is arranged between the first belt pulley and the second belt pulley, and the first belt pulley is connected with the second belt pulley through the belt.
Through adopting above-mentioned technical scheme, first belt pulley and second belt pulley pass through the belt and carry out synchronous rotation.
In summary, the present application includes the following beneficial technical effects:
1. the utility model provides a heating furnace mouth sealing device, through the design of regulation and control mechanism, sealed apron can close the heat preservation frame top and seal, and the sealing block then can seal the opening of heat preservation frame bottom, when throwing the material, the material is at first got into inside the heat preservation frame, the sealing block still seals the furnace body inlet pipe this moment, after the material is added and is accomplished, then seal the apron down, the sealing block is relieved simultaneously and is added the sealing of buckle on the heat preservation frame, then the material can get into through the furnace body inlet pipe this moment and add, thereby realize that the whole material in-process of throwing can not communicate furnace body inlet pipe and external world, thereby lead to the condition of heat giving off.
2. The utility model provides a heating furnace mouth sealing device, has effectively realized when carrying out the material and put in, the furnace body inlet pipe can not take place to communicate with the external world, has avoided heat to leak and has led to the condition of energy loss to when realizing above function, not add too much spare part, be favorable to manufacturing and control cost, and the operation process need not artifical too much participation, comparatively uses manpower sparingly.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of the structure of the present utility model;
FIG. 3 is an enlarged view at A in FIG. 2;
fig. 4 is a top cross-sectional view of a rectangular frame in the present utility model.
Reference numerals illustrate: 1. a furnace body feeding pipe; 2. a heat preservation frame; 3. a support plate; 4. a regulating mechanism; 41. an auxiliary frame; 42. a motor; 43. a threaded rod; 44. a sealing block; 45. sealing the cover plate; 46. a U-shaped plate; 47. a first threaded block; 48. a first push plate; 49. a limiting telescopic rod; 491. a second threaded block; 492. a second pushing plate; 493. an annular groove; 494. a slide block; 495. a movable block; 496. an electric telescopic rod; 497. a rectangular frame; 498. a telescopic transmission rod; 499. a first bevel gear; 481. a round bar; 482. a second bevel gear; 483. a third bevel gear; 484. a first pulley; 485. a second pulley; 486. a bi-directional threaded rod.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a heating furnace mouth sealing device. Referring to fig. 1-4, a sealing device for a furnace mouth of a heating furnace comprises a furnace body feeding pipe 1, wherein a heat preservation frame 2 is fixedly connected to the top of the furnace body feeding pipe 1, a supporting plate 3 is fixedly connected to the outer side of the heat preservation frame 2, a regulating and controlling mechanism 4 is arranged on the heat preservation frame 2, the regulating and controlling mechanism 4 comprises two auxiliary frames 41, the two auxiliary frames 41 are respectively and fixedly connected to the left side and the right side of the furnace body feeding pipe 1, a motor 42 is fixedly connected to the inside of one auxiliary frame 41, a threaded rod 43 is fixedly connected to the motor 42 through an output shaft, the threaded rod 43 penetrates through one side wall of the heat preservation frame 2 and the other auxiliary frame 41 respectively, and the threaded rod 43 is connected with the heat preservation frame 2 and the other auxiliary frame 41 through sealing bearings respectively;
the inside sealing piece 44 that is provided with of heat preservation frame 2, sealing piece 44 and heat preservation frame 2 assortment, heat preservation frame 2 top is provided with sealing cover plate 45, backup pad 3 top is provided with U-shaped plate 46, U-shaped plate 46 inboard rotates and is connected with two-way threaded rod 486, two-way threaded rod 486 extends U-shaped plate 46 outside, sealing cover plate 45 can close the sealing to heat preservation frame 2 top, and sealing piece 44 then can seal the opening of heat preservation frame 2 bottom, when throwing the material, the material gets into heat preservation frame 2 at first inside, sealing piece 44 still seals furnace body inlet pipe 1 this moment, after the material is added and is accomplished, then sealing cover plate 45 is pressed down, sealing piece 44 releases the seal to the buckle on the heat preservation frame 2 simultaneously, then the material gets into the interpolation through furnace body inlet pipe 1 this moment, so realize in the whole material throwing process all can not with furnace body inlet pipe 1 and external intercommunication, thereby lead to the condition of heat dissipation.
The outside of the threaded rod 43 is provided with a first thread block 47, the top of the first thread block 47 is movably connected with a first pushing plate 48 through a movable hinge seat, the top of the first pushing plate 48 is movably connected with the bottom of the sealing block 44 through a movable hinge seat, the inside of the heat preservation frame 2 is fixedly connected with a transverse plate, the bottom of the transverse plate is fixedly connected with a limiting telescopic rod 49, the bottom of the limiting telescopic rod 49 is fixedly connected with the top of the sealing block 44, the threaded rod 43 can drive the first thread block 47 to move after rotating, two second thread blocks 491 are arranged outside the bidirectional threaded rod 486, the bottom of the second thread block 491 is movably connected with a second pushing plate 492 through a movable hinge seat, the bottom of the second pushing plate 492 is movably connected with the top of the sealing cover plate 45 through a movable hinge seat, an annular groove 493 is formed in the bottom of the sealing cover plate 45, the annular groove 493 is matched with the heat preservation frame 2, and the directions of threads at two ends of the bidirectional threaded rod 486 are opposite;
the spout has all been seted up on U-shaped plate 46 inboard both sides, and seal cover 45 both sides all fixedly connected with slider 494, and slider 494 extends into the spout inside and with spout assorted, has seted up two movable grooves on the backup pad 3, and U-shaped plate 46 bottom fixedly connected with two movable blocks 495, movable block 495 run through the movable groove and with movable groove assorted, movable block 495 front side fixedly connected with electric telescopic handle 496, electric telescopic handle 496 fixedly connected with is inside the movable groove, and slider 494 can be in the inside nimble removal of spout.
The regulating mechanism 4 comprises a transmission assembly, the transmission assembly comprises two rectangular frames 497, a bidirectional threaded rod 486 extends into one rectangular frame 497 and is rotationally connected with the rectangular frame 497, a telescopic transmission rod 498 is rotationally connected between the two rectangular frames 497, the telescopic transmission rod 498 extends into the two rectangular frames 497 respectively, the telescopic transmission rod 498 is rotationally connected with the two rectangular frames 497 respectively, two first bevel gears 499 are fixedly connected to the outer part of the telescopic transmission rod 498, the two first bevel gears 499 are respectively arranged in the two rectangular frames 497, and the telescopic transmission rod 498 is used for transmission to promote the bidirectional threaded rod 486 to rotate;
one side of the rectangular frame 497 is provided with a round bar 481, the round bar 481 extends into the rectangular frame 497 and is rotationally connected with the rectangular frame 497, a second bevel gear 482 is fixedly connected to the outside of the bidirectional threaded rod 486, a third bevel gear 483 is fixedly connected to the outside of the round bar 481, the second bevel gear 482 and the third bevel gear 483 are respectively arranged on one side of the two first bevel gears 499, the second bevel gear 482 and the third bevel gear 483 are respectively meshed with the two first bevel gears 499, the bottoms of the two rectangular frames 497 are fixedly connected with L-shaped plates, one L-shaped plate is fixedly connected to one side of the U-shaped plate 46, the other L-shaped plate is fixedly connected to one side of the supporting plate 3, the L-shaped plate provides support for the fixed frame, a first belt pulley 484 is fixedly connected to the outside of the threaded rod 43, a second belt pulley 481 is fixedly connected to the outside of the round bar, a belt pulley 484 is arranged between the first belt pulley 484 and the second belt pulley 485, the first belt pulley 484 and the second belt pulley 485 are connected through a belt, and the first belt pulley 484 and the second belt 485 are synchronously rotated through a belt.
In the actual operation process, the device is firstly powered on, the furnace body feeding pipe 1 is a feeding pipeline on the heating furnace body, a motor 42 in the device can drive a threaded rod 43 to rotate after working, the threaded rod 43 drives a first belt pulley 484 to rotate, the first belt pulley 484 drives a second belt pulley 485 to rotate through a belt, the second belt pulley 485 drives a round bar 481 to rotate, the round bar 481 drives an external third bevel gear 483 to rotate, the third bevel gear 483 drives a first bevel gear 499 on one side to rotate, then the first bevel gear 499 drives a telescopic transmission rod 498 to rotate at the moment, the other first bevel gear 499 on the telescopic transmission rod 498 drives a second bevel gear 482 to rotate, the second bevel gear 482 drives a bidirectional threaded rod 486, and the principle can prove that when the motor 42 works, the threaded rod 43 and the bidirectional threaded rod 486 synchronously start to rotate;
when the threaded rod 43 rotates, the threaded rod 43 drives the first threaded block 47 to move, the first threaded block 47 drives the first pushing plate 48 to turn over, the first pushing plate 48 pushes the sealing block 44 up and down, the two second threaded blocks 491 are driven to move in opposite directions or back to back after the bidirectional threaded rod 486 rotates, the second threaded block 491 drives the second pushing plate 492 to turn over, the second pushing plate 492 can drive the sealing cover plate 45 to push and pull up and down, in the device, when the sealing block 44 gives up sealing to an opening in the heat preservation frame 2, the sealing cover plate 45 starts to seal the top of the heat preservation frame 2, otherwise, when a user adds materials, the sealing cover plate 45 is known by the principle, the sealing cover plate 45 is opened, the sealing block 44 keeps the sealing state of the heat preservation frame 2, then the electric telescopic rod 496 pushes the sealing block 44 after working, so that the sealing cover plate 45 is driven to move, the sealing cover plate 45 can be used for adding materials through the furnace body feeding materials, the sealing cover plate 45 seals the top of the heat preservation frame 2 after the furnace body feeding materials is finished, and the situation that the feeding materials cannot be leaked outside due to the fact that the heat is avoided.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. The utility model provides a heating furnace mouth sealing device, includes furnace body inlet pipe (1), its characterized in that: the top of the furnace body feeding pipe (1) is fixedly connected with a heat preservation frame (2), the outer side of the heat preservation frame (2) is fixedly connected with a supporting plate (3), and the heat preservation frame (2) is provided with a regulating mechanism (4);
the utility model provides a regulation and control mechanism (4) include two auxiliary frame (41), two auxiliary frame (41) are fixedly connected with in furnace body inlet pipe (1) left and right sides respectively, and one of them auxiliary frame (41) inside fixedly connected with motor (42), motor (42) are through output shaft fixedly connected with threaded rod (43), threaded rod (43) run through heat preservation frame (2) and another auxiliary frame (41) lateral wall respectively, and threaded rod (43) are connected through sealed bearing with heat preservation frame (2) and auxiliary frame (41) respectively, heat preservation frame (2) inside is provided with sealing block (44), sealing block (44) and heat preservation frame (2) assorted, heat preservation frame (2) top is provided with sealed apron (45), backup pad (3) top is provided with U shaped plate (46), U shaped plate (46) inboard rotation is connected with two-way threaded rod (486), and two-way threaded rod (486) extend U shaped plate (46) outside.
2. A furnace mouth sealing device according to claim 1, wherein: the utility model discloses a heat preservation frame, including threaded rod (43), sealing block (44), heat preservation frame (2), threaded rod (43) outside is provided with first screw thread piece (47), first screw thread piece (47) top is through movable free bearing swing joint has first push plate (48), and first push plate (48) top and sealing block (44) bottom are through movable free bearing swing joint, inside fixedly connected with diaphragm of heat preservation frame (2), diaphragm bottom fixedly connected with spacing telescopic link (49), spacing telescopic link (49) bottom and sealing block (44) top fixed connection.
3. A furnace mouth sealing device according to claim 1, wherein: two second thread blocks (491) are arranged outside the bidirectional threaded rod (486), a second pushing plate (492) is movably connected to the bottom of the second thread block (491) through a movable hinged support, the bottom of the second pushing plate (492) is movably connected with the top of the sealing cover plate (45) through the movable hinged support, an annular groove (493) is formed in the bottom of the sealing cover plate (45), and the annular groove (493) is matched with the heat preservation frame (2).
4. A furnace mouth sealing device according to claim 1, wherein: the sliding grooves are formed in two sides of the inner side of the U-shaped plate (46), the sliding blocks (494) are fixedly connected to two sides of the sealing cover plate (45), the sliding blocks (494) extend into the sliding grooves and are matched with the sliding grooves, two movable grooves are formed in the supporting plate (3), two movable blocks (495) are fixedly connected to the bottom of the U-shaped plate (46), the movable blocks (495) penetrate through the movable grooves and are matched with the movable grooves, an electric telescopic rod (496) is fixedly connected to the front side of the movable blocks (495), and the electric telescopic rod (496) is fixedly connected to the inside of the movable grooves.
5. A furnace mouth sealing device according to claim 1, wherein: the regulation and control mechanism (4) comprises a transmission assembly, the transmission assembly comprises two rectangular frames (497), a bidirectional threaded rod (486) extends into one rectangular frame (497) and is rotationally connected with the rectangular frame (497), a telescopic transmission rod (498) is rotationally connected between the two rectangular frames (497), the telescopic transmission rod (498) extends into the two rectangular frames (497) respectively, the telescopic transmission rod (498) is rotationally connected with the two rectangular frames (497) respectively, two first bevel gears (499) are fixedly connected to the outer portion of the telescopic transmission rod (498), and the two first bevel gears (499) are respectively arranged in the two rectangular frames (497).
6. A furnace mouth sealing device according to claim 5, wherein: one of them rectangle frame (497) one side is provided with round bar (481), round bar (481) extend into rectangle frame (497) inside and rotate with rectangle frame (497) and be connected, two-way threaded rod (486) outside fixedly connected with second bevel gear (482), round bar (481) outside fixedly connected with third bevel gear (483), second bevel gear (482) and third bevel gear (483) set up respectively in two first bevel gear (499) one side, second bevel gear (482) and third bevel gear (483) mesh with two first bevel gear (499) respectively, two equal fixedly connected with L shaped plates in rectangle frame (497) bottom, one of them L shaped plate fixedly connected with U shaped plate (46) one side, another L shaped plate fixedly connected with backup pad (3) one side.
7. A furnace mouth sealing device according to claim 1, wherein: the threaded rod (43) is fixedly connected with a first belt pulley (484) outside, the round rod (481) is fixedly connected with a second belt pulley (485) outside, a belt is arranged between the first belt pulley (484) and the second belt pulley (485), and the first belt pulley (484) is connected with the second belt pulley (485) through the belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272104.5U CN220624881U (en) | 2023-08-23 | 2023-08-23 | Furnace mouth sealing device of heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272104.5U CN220624881U (en) | 2023-08-23 | 2023-08-23 | Furnace mouth sealing device of heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220624881U true CN220624881U (en) | 2024-03-19 |
Family
ID=90230087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322272104.5U Active CN220624881U (en) | 2023-08-23 | 2023-08-23 | Furnace mouth sealing device of heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220624881U (en) |
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2023
- 2023-08-23 CN CN202322272104.5U patent/CN220624881U/en active Active
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