CN219552305U - Hollow column detection equipment - Google Patents
Hollow column detection equipment Download PDFInfo
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- CN219552305U CN219552305U CN202320608462.6U CN202320608462U CN219552305U CN 219552305 U CN219552305 U CN 219552305U CN 202320608462 U CN202320608462 U CN 202320608462U CN 219552305 U CN219552305 U CN 219552305U
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- fixing member
- rod body
- hollow column
- fixing
- sliding seat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses a hollow column detection device, comprising: an X-ray imaging device comprising an X-ray generating device and a detector for receiving X-rays; the X-ray generating device is arranged at the front end of the rod body along the first direction; the front guide supporting mechanism is arranged at the front part of the rod body along the first direction and is configured to guide and support the front end of the rod body so that the front end of the rod body is positioned in the center of the hollow column; the rear centering fixing mechanism is arranged at the rear part of the rod body along the first direction and comprises a first fixing piece and a second fixing piece which are arranged front and back in the first direction. The utility model can extend into the hollow column and align with the center of the hollow column, and can accurately judge whether the reinforcing steel bars are absent or not and the sizes of the reinforcing steel bars are consistent. The actual size of each reinforcing steel bar can be obtained through the correlation calculation.
Description
Technical Field
The utility model relates to the technical field of detection equipment, in particular to hollow column detection equipment.
Background
The hollow columns of the cement pipe pile, the cement wire pole and the like are composed of concrete and reinforcing steel bars. The reinforced steel bar with strong tensile capacity is put into the concrete, so that the structures of the cement pipe piles and the cement telegraph poles are harder and firmer.
At present, partial bad manufacturers realize higher profits for reducing the cost, and the number of reinforcing steel bars is reduced or small-specification reinforcing steel bars are used in the middle sections of the cement pipe piles and the cement telegraph poles. In the prior art, in order to ensure the quality of the cement pipe piles and the cement telegraph poles, the steel bars are prevented from being inconsistent with the requirements, destructive detection is generally adopted, and the structures of the cement pipe piles and the cement telegraph poles are broken through equipment or manual violence so that the steel bars wrapped by concrete are detected after being exposed, so that the cost is high and the efficiency is low.
Disclosure of Invention
The utility model aims to provide a hollow column detection device which has the advantages of accurately judging whether the steel bars are absent or not and the sizes of the steel bars are consistent, and solves the problem of inconvenient detection of the steel bars in the hollow column.
According to an embodiment of the present utility model, a hollow column detection apparatus includes:
an X-ray imaging device comprising an X-ray generating device and a detector for receiving X-rays;
the X-ray generating device is arranged at the front end of the rod body along the first direction;
the front guide supporting mechanism is arranged at the front part of the rod body along the first direction and is configured to guide and support the front end of the rod body so that the front end of the rod body is positioned in the center of the hollow column;
the rear centering fixing mechanism is arranged at the rear part of the rod body along the first direction and comprises a first fixing piece and a second fixing piece which are arranged front and back in the first direction, the first fixing piece and the second fixing piece are configured to be movable in the second direction, fixing parts are arranged at one ends, far away from each other, of the first fixing piece and the second fixing piece, a first rack and a second rack are respectively arranged on opposite surfaces of the first fixing piece and the second fixing piece, gears are connected between the first rack and the second rack in a meshed mode, the gears and the rod body are concentrically arranged, and the distances from the center point of projection of the gears in the first direction to the outer ends of the first fixing piece and the second fixing piece are equal.
In some embodiments, the lead support mechanism comprises: the sliding seat, fixing base and at least 3 receipts and display the subassembly, the fixing base with the sliding seat sets up around in first direction, the sliding seat slides along first direction and sets up on the body of rod, the fixing base is fixed to be set up on the first direction the body of rod, realize the sliding seat with the fixing base distance is adjustable, at least 3 the contained angle between two adjacent in the receipts and display the subassembly is the same, it includes articulated arm and movable arm to receive and display the subassembly, articulated arm one end articulates on the sliding seat, and the other end articulates on the movable arm, movable arm one end articulates on the fixing base, and the other end is provided with the pulley.
In some embodiments, the rear centering fixation mechanism further comprises a limit guide mechanism connecting the first fixation member and the second fixation member, the limit guide mechanism configured to limit movement of the first fixation member and the second fixation member in a second direction only.
In some embodiments, the rear centering fixture further comprises a first telescoping device configured to urge the first and second fixtures to move in a second direction to drive the first and second fixtures to clamp and unclamp the hollow column.
In some embodiments, the first fixing member and the second fixing member are plate-shaped, the first fixing member and the second fixing member are arranged in parallel through a limiting guide mechanism, at least one of the first fixing member and the second fixing member is provided with an opening, the axial lead of the gear is located in the opening, and the opening has a certain length in the second direction, so that the axial lead of the gear is always located in the opening in the moving process of the first fixing member and the second fixing member in the second direction.
In some embodiments, the sliding seat is connected with a second telescopic device for pushing the sliding seat to move along a first direction, a rotation directional moving mechanism is arranged between the second telescopic device and the sliding seat, and the rotation directional moving mechanism is configured to connect the second telescopic device and the sliding seat and realize that the sliding seat can rotate around the axial lead of the rod body and the sliding seat can move along the first direction.
In some embodiments, the rotation directional moving mechanism includes a first rotating bearing, the sliding seat is rotatably mounted on the rod body through the first rotating bearing, the fixing seat is rotatably mounted on the rod body through a second rotating bearing, the second telescopic device is arranged in the rod body, the second telescopic device pushes the movable end of the sliding seat to move, a guiding piece is arranged at the movable end of the sliding seat, a slot arranged along a first direction is formed in the rod body, the outer end of the guiding piece extends out of the rod body from the slot, the guiding piece can move along the slot, an annular groove coaxial with the rod body is formed in the sliding seat, the outer end of the guiding piece is positioned in the annular groove, and circumferential movement along the annular groove can be generated between the guiding piece and the sliding seat.
In some embodiments, the guide member is in a straight shape perpendicular to the first direction, the outer end of the guide member is rotatably provided with a roller, the rotation axis of the roller is perpendicular to the first direction, and the outer diameter of the roller is smaller than the width of the annular groove.
In some embodiments, the fixing portion on the first fixing member and the second fixing member includes two claws respectively mounted on the same surface of the first fixing member and the second fixing member, and distances from the two claws on the first fixing member and the second fixing member to a center line of the first fixing member and the second fixing member are equal.
In some embodiments, the first fixing member and the second fixing member are provided with openings, and the gear is provided with a flange concentric with the first fixing member, so that the rod body can penetrate through the openings and be mounted on the flange.
According to the technical scheme, the X-ray generating device can extend into the hollow column, and the guiding support mechanism is used for guiding and supporting the X-ray generating device in the hollow column, so that the X-ray generating device is always in the center of the hollow column, and the X-ray generating device can adapt to different diameters. The rear centering fixing mechanism can be fixed on hollow columns with different sizes. The simple gear rack arrangement of centering synchro constructs can guarantee that the center of fixed back body of rod rear end aligns with the center of hollow post to realize the body of rod whole and the center alignment of hollow post. The center of the X-ray generating device is not deviated from the center of the hollow column by rotating the rod body and the X-ray generating device at any time. The distance from the X-ray generating device to the periphery of the hollow column is guaranteed to be equal, the imaging size proportion of the reinforcing steel bars after the radial imaging is sequentially carried out on each reinforcing steel bar on the periphery of the hollow column is consistent, and therefore whether the reinforcing steel bars are lack or not and the condition that the sizes of the reinforcing steel bars are consistent can be accurately judged. The actual size of each reinforcing steel bar can be obtained through the correlation calculation.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic structural diagram of a hollow column detection device according to the present utility model;
FIG. 2 is a schematic cross-sectional view of a hollow column detection apparatus according to the present utility model;
FIG. 3 is an enlarged view of part B of FIG. 2;
FIG. 4 is a schematic side view of a rear centering fixture of the hollow column inspection apparatus of the present utility model;
FIG. 5 is a schematic front view of a rear centering fixture of the hollow column inspection apparatus of the present utility model;
FIG. 6 is a schematic perspective view of a rear centering fixture of the hollow column inspection apparatus of the present utility model;
fig. 7 is a state diagram of the hollow column detection apparatus according to the present utility model.
In the figure: 1-hollow column, 2-X ray generating device, 3-detector, 4-reinforcing bar, 5-body of rod, 500-fluting, 6-sliding seat, 600-ring channel, 7-fixing base, 8-second telescoping device, 9-first swivel bearing, 10-second swivel bearing, 11-guide, 12-gyro wheel, 13-articulated arm, 14-movable arm, 15-pulley, 16-first mounting, 17-second mounting, 18-spacing guiding mechanism, 19-fixed part, 20-first rack, 21-second rack, 22-gear, 23-first telescoping device, 24-connection lug, 25-trompil, 26-ring flange.
Description of the embodiments
The technical scheme of the utility model is described in more detail below with reference to fig. 1-7.
Referring to fig. 1, the present utility model provides a hollow column detection apparatus. The device is used for detecting imaging and the like in the hollow column 1 extending into the hollow cement pipe pile, the cement wire pole and the like. During detection, the X-ray generating device 2 is positioned in the hollow column 1, the detector 3 is positioned outside the hollow column 1, and the detector 3 receives rays passing through the hollow column 1 so as to realize ray imaging of the hollow column 1. When the sizes of the steel bars 4 in the hollow column 1 need to be compared, the X-ray generating device 2 needs to be positioned at the inner center of the hollow column, the detector 3 is tightly fixed on the outer wall of the hollow column 1 through a binding belt and the like, the measured steel bars 4 are imaged to be positioned in the middle of the detector 3, and finally the actual diameter of the steel bars 4 is calculated through the imaging size of the steel bars 4 on the detector 3 and other relevant sizes.
The diameter of the steel bar 4 is calculated as follows:
the imaging width L of the steel bar 4 on the detector 3 is calculated through a computer, the radius R of the hollow column, the size L1 of a sensor of the detector 3 from the surface of the detector and the wall thickness t of the hollow column are known, and the actual diameter d= (R-t/2)/(R+L1) x L of the steel bar 4 can be calculated according to a formula.
Further, the hollow column 1 detection apparatus provided by the embodiment of the present utility model includes an X-ray imaging device, a rod body 5, and a leading support mechanism. The X-ray imaging device comprises an X-ray generating device 1 and a detector 2 for receiving X-rays.
The rod body 5 is mainly used for conveying the X-ray generating device 2 into the hollow column 1. The rod body 5 is cylindrical, and the X-ray generating device 2 is disposed at a front end of the rod body 5 along the first direction a.
Referring to fig. 2-3, the leading support mechanism is disposed at the front of the rod 5 in the first direction a. The guiding support is used for guiding and supporting the front end of the rod body 5, so that the front end of the rod body 5 is positioned in the center of the hollow column 1. The leading support mechanism includes: the sliding seat 6, the fixed seat 7 and at least 3 folding and unfolding components. The fixed seat 6 and the sliding seat 7 are arranged back and forth in the first direction a. The sliding seat 6 is arranged on the rod body 5 in a sliding manner along the first direction A, and the fixed seat 7 is fixedly arranged on the rod body 5 in the first direction A, so that the distance between the sliding seat 6 and the fixed seat 7 is adjustable. In some embodiments, the sliding seat 6 is connected with a second telescopic device 8 pushing the sliding seat 6 to move along the first direction a, a rotation directional moving mechanism is arranged between the second telescopic device 8 and the sliding seat 6, and the rotation directional moving mechanism is used for connecting the second telescopic device 8 and the sliding seat 6, and realizes that the sliding seat 6 can rotate around the axial lead of the rod body 5 and the sliding seat 6 can move along the first direction a.
The rotary directional moving mechanism comprises a first rotary bearing 9, the sliding seat 6 is rotatably arranged on the rod body 5 through the first rotary bearing 9, and the fixed seat 7 is rotatably arranged on the rod body 5 through a second rotary bearing 10. Both the sliding seat 6 and the fixed seat 7 can rotate around the axis of the rod body 5. The second telescopic device 8 is arranged in the rod body 5, the movable end of the second telescopic device 8 pushing the sliding seat 6 to move is provided with a guide piece 11, the rod body 5 is provided with a groove 500 arranged along the first direction A, the outer end of the guide piece 11 extends out of the rod body 5 from the groove 500, and the guide piece 11 can move along the groove 500 (namely, under the limit guiding action of the groove 500 and the guide piece 11, the second telescopic device 8 can push the sliding seat 6 to move along the first direction A). An annular groove 600 coaxial with the rod body 5 is arranged in the sliding seat 6, the outer end of the guide piece 11 is positioned in the annular groove 600, and circumferential movement along the annular groove 600 can be generated between the guide piece 11 and the sliding seat 6. In some embodiments, the guide member 11 is in a shape of a straight line perpendicular to the first direction a, the outer end of the guide member 11 is rotatably provided with a roller 12, the rotation axis of the roller 12 is perpendicular to the first direction a, and the outer diameter of the roller 12 is smaller than the width of the annular groove 600. The provision of the roller 12 at the outer end of the guide 11 reduces resistance between the guide 11 and the slide seat 6 when movement in the circumferential direction of the annular groove 600 is generated, and furthermore, the roller 12 has an outer diameter smaller than the wide band of the annular groove 600 so that the roller 12 can roll along the side wall of the annular groove 600.
The angles between two adjacent ones of the at least 3 expansion members are all the same, and the number of the at least 3 expansion members is determined by determining a plane from the 3 points. At least 3 folding and unfolding components can ensure that the outer ends of the folding and unfolding components are always contacted with the inner wall of the hollow column 1. The included angles between two adjacent folding assemblies in at least 3 folding assemblies are the same, namely when the number of the folding assemblies is 3, the included angle between the two adjacent folding assemblies is 360/3=120°. For another example, the number of the folding and unfolding assemblies shown in the drawing of the utility model is 6, and the included angle between two adjacent assemblies is 360 degrees/6=60 degrees. The folding and unfolding assembly comprises an articulated arm 13 and a movable arm 14, one end of the articulated arm 13 is articulated on the sliding seat 6, the other end of the articulated arm is articulated on the movable arm 14, one end of the movable arm 14 is articulated on the fixed seat 7, and the other end of the movable arm is provided with a pulley 15. The articulated arm 13 and the movable arm 14 will rotate with the distance between the sliding seat 6 and the fixed seat 7. Before extending into the hollow column 1, the opening angle of the movable arm 14 is required to be smaller, so that the movable arm is convenient to extend into the hollow column 1, after extending into the hollow column 1, the center of the X-ray generating device 2 is required to be aligned with the center of the hollow column 1, and the opening angle of the movable arm 14 is required to be enlarged, so that the outer end of the movable arm 14 is in contact with the inner wall of the hollow column 1, and the center of the front end of the leading support mechanism is required to be aligned with the center of the hollow column 1. The pulley 15 at the outer end of the movable arm 14 can move in a rolling manner by contacting the pulley 15 with the inner wall in the hollow column 1, so that the movement is smoother.
Referring to fig. 4-6, a rear centering fixture is used to fix the rod body 5 to the hollow column 1 and align the center of the hollow column 1. The rear centering fixing mechanism is arranged at the rear part of the rod body 5 along the first direction A and comprises a first fixing piece 16 and a second fixing piece 17 which are arranged front and back in the first direction A. The first fixing member 16 and the second fixing member 17 are configured to be movable in the second direction B, and in some embodiments, the first fixing member 16 and the second fixing member 17 are plate-shaped, the first fixing member 16 and the second fixing member 17 are disposed in parallel by a limit guide mechanism 18, the limit guide mechanism 18 may be a linear slide rail disposed along the second direction B and a slider matched with the linear slide rail, one of the first fixing member 16 and the second fixing member 17 is disposed with the linear slide rail, and the other is disposed with the slider, and the slider is slidably connected to the linear slide rail.
The first fixing member 16 and the second fixing member 17 each have a fixing portion 19 at an end thereof remote from each other. The fixing portion 19 on the first fixing member 16 and the second fixing member 17 includes two claws respectively mounted on the same face of the first fixing member 16 and the second fixing member 17, and distances from the respective two claws on the first fixing member 16 and the second fixing member 17 to the center line of the first fixing member 16 and the second fixing member 17 are equal. The claws may be rod-shaped or plate-shaped projections fixedly provided on the first fixing member 16, the second fixing member 17. The jaws shown in the drawings of the present utility model are integrally formed with the first and second fixing members 16 and 17.
The opposite surfaces of the first fixing piece 16 and the second fixing piece 17 are respectively provided with a first rack 20 and a second rack 21, and a gear 22 is connected between the first rack 20 and the second rack 21 in a meshed mode, namely the first rack 20 and the second rack 21 are respectively positioned on two sides of the gear 22. Since the first rack 20 and the second rack 21 are both meshed with the gear 22, when the first fixing member 16 and/or the second fixing member 17 are pushed and pulled, the first rack 16 and the second rack 17 synchronously move towards and away from each other, so that synchronous opposite movement or opposite movement of the first fixing member 16 and the second fixing member 17 is realized. The gear 22 is arranged concentrically with the rod body 5. The distance from the center point of the projection of the gear 22 in the first direction a to the outer ends of the first fixing member 16 and the second fixing member 17 is equal.
The rear centering fixture further comprises a first telescopic device 23, the first telescopic device 23 being configured to push the first and second fixing members 16, 17 to move in the second direction B to drive the first and second fixing members 16, 17 to clamp and unclamp the hollow column 1. The connecting protrusions 24 are arranged on the other surfaces of the first fixing piece 16 and the second fixing piece 17 opposite to the clamping jaws, the connecting protrusions 24 can be integrally formed with the first fixing piece 16 and the second fixing piece 17, and two ends of the first telescopic device 23 are respectively connected to the connecting protrusions 24. The first telescopic means 23 and the second telescopic means 8 may each be an electric telescopic rod or a hydraulic rod.
At least one of the first fixing member 16 and the second fixing member 17 is provided with an opening 25, the axis of the gear 22 is located in the opening 25, and the opening 25 has a certain length in the second direction B, so that the axis of the gear 22 is always located in the opening 25 during the movement of the first fixing member 16 and the second fixing member 17 in the second direction B. In some embodiments, the first fixing member 16 and the second fixing member 17 are provided with openings 25, and the gear 22 is provided with a flange 26 concentric with the openings so that the rod 5 can pass through the openings 25 and be mounted on the flange 26.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (11)
1. Hollow post check out test set, its characterized in that includes:
an X-ray imaging device comprising an X-ray generating device and a detector for receiving X-rays;
the X-ray generating device is arranged at the front end of the rod body along the first direction;
the front guide supporting mechanism is arranged at the front part of the rod body along the first direction and is configured to guide and support the front end of the rod body so that the front end of the rod body is positioned in the center of the hollow column;
the rear centering fixing mechanism is arranged at the rear part of the rod body along the first direction and is configured to fix the rod body on the hollow column and realize the alignment of the axis of the rod body and the axis of the hollow column.
2. The hollow column detecting apparatus according to claim 1, wherein the rear centering fixing mechanism includes a first fixing member and a second fixing member disposed front and rear in a first direction, the first fixing member and the second fixing member being configured to be movable in a second direction, one ends of the first fixing member and the second fixing member which are away from each other each have a fixing portion, first and second racks are provided on opposite faces of the first and second fixing members, respectively, a gear is engaged between the first and second racks, the gear is disposed concentrically with the rod body, and a distance from a center point of projection of the gear in the first direction to outer ends of the first and second fixing members is equal.
3. The hollow column detection apparatus according to claim 2, wherein the leading support mechanism comprises: the sliding seat, fixing base and at least 3 receipts and display the subassembly, the fixing base with the sliding seat sets up around in first direction, the sliding seat slides along first direction and sets up on the body of rod, the fixing base is fixed to be set up on the first direction the body of rod, realize the sliding seat with the fixing base distance is adjustable, at least 3 the contained angle between two adjacent in the receipts and display the subassembly is the same, it includes articulated arm and movable arm to receive and display the subassembly, articulated arm one end articulates on the sliding seat, and the other end articulates on the movable arm, movable arm one end articulates on the fixing base, and the other end is provided with the pulley.
4. The hollow column detection apparatus of claim 2, wherein the rear centering fixture further comprises a limit guide connecting the first and second fixtures, the limit guide configured to limit movement of the first and second fixtures in only a second direction.
5. The hollow column inspection apparatus of claim 4, wherein the rear centering fixture further comprises a first telescoping device configured to urge the first and second fixtures in a second direction to drive the first and second fixtures to clamp and unclamp the hollow column.
6. The hollow column detecting apparatus according to claim 5, wherein the first fixing member and the second fixing member are plate-shaped, the first fixing member and the second fixing member are arranged in parallel through a limit guide mechanism, an opening is formed in at least one of the first fixing member and the second fixing member, an axis of the gear is located in the opening, and the opening has a certain length in the second direction, so that the axis of the gear is always located in the opening during movement of the first fixing member and the second fixing member in the second direction.
7. A hollow column detection apparatus according to claim 3, wherein the slide holder is connected with a second telescopic device that urges it to move in a first direction, a rotational orientation moving mechanism is provided between the second telescopic device and the slide holder, the rotational orientation moving mechanism is configured to connect the second telescopic device and the slide holder, and to enable the slide holder to rotate about an axis of the rod body and the slide holder to move in the first direction.
8. The hollow column detection apparatus according to claim 7, wherein the rotational orientation moving mechanism includes a first rotary bearing, the sliding seat is rotatably mounted on the rod body through the first rotary bearing, the fixing seat is rotatably mounted on the rod body through a second rotary bearing, the second telescopic device is disposed in the rod body, the movable end of the second telescopic device pushing the sliding seat to move is provided with a guide member, a slot disposed along a first direction is formed in the rod body, the outer end of the guide member extends out of the rod body from the slot, the guide member can move along the slot, an annular groove coaxial with the rod body is formed in the sliding seat, the outer end of the guide member is disposed in the annular groove, and circumferential movement along the annular groove can be generated between the guide member and the sliding seat.
9. The hollow column detecting apparatus according to claim 8, wherein the guide member is in a straight shape perpendicular to the first direction, the outer end of the guide member is rotatably provided with a roller, the rotational axis of the roller is perpendicular to the first direction, and the outer diameter of the roller is smaller than the width of the annular groove.
10. The hollow column detecting apparatus according to claim 6, wherein the fixing portions on the first fixing member and the second fixing member include two claws mounted on the same face of the first fixing member and the second fixing member, respectively, and distances from the two claws on the first fixing member and the second fixing member to a center line of the first fixing member and the second fixing member are equal.
11. The hollow column detection apparatus according to claim 6, wherein the first fixing member and the second fixing member are each provided with an opening, and the gear is provided with a flange concentric therewith, so that the rod body can pass through the openings and be mounted on the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320608462.6U CN219552305U (en) | 2023-03-25 | 2023-03-25 | Hollow column detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320608462.6U CN219552305U (en) | 2023-03-25 | 2023-03-25 | Hollow column detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219552305U true CN219552305U (en) | 2023-08-18 |
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ID=87699856
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320608462.6U Active CN219552305U (en) | 2023-03-25 | 2023-03-25 | Hollow column detection equipment |
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| Country | Link |
|---|---|
| CN (1) | CN219552305U (en) |
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2023
- 2023-03-25 CN CN202320608462.6U patent/CN219552305U/en active Active
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