CN221021709U - Concrete mixing device for construction - Google Patents
Concrete mixing device for construction Download PDFInfo
- Publication number
- CN221021709U CN221021709U CN202323037056.8U CN202323037056U CN221021709U CN 221021709 U CN221021709 U CN 221021709U CN 202323037056 U CN202323037056 U CN 202323037056U CN 221021709 U CN221021709 U CN 221021709U
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- stirring
- driving shaft
- kettle body
- stirring kettle
- concrete mixing
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- 239000004567 concrete Substances 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims description 6
- 238000003756 stirring Methods 0.000 claims abstract description 133
- 238000009435 building construction Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000007790 scraping Methods 0.000 claims description 13
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
A concrete mixing device for building construction relates to the technical field of building construction equipment, and comprises a stirring kettle body which is fixedly arranged, wherein a stirring assembly is arranged in the stirring kettle body, and a cleaning assembly is arranged on the stirring assembly; the stirring assembly can uniformly stir the materials in all positions in the space in the stirring kettle body; the cleaning component can quickly clean the concrete attached to the inner wall of the stirring kettle body; the stirring assembly comprises a driving shaft which is rotationally arranged, two groups of stirring blades which are symmetrically arranged along the axial section of the driving shaft are fixedly arranged on the outer wall of the driving shaft, a plurality of stirring blades in each group are uniformly distributed along the axis of the driving shaft, and the driving shaft is vertically and reciprocally arranged in a sliding manner. The utility model solves the problem of poor mixing quality of concrete caused by smaller material stirring amplitude at the middle position between two adjacent stirring blades of the concrete mixing device for the existing building construction; the concrete attached to the inner wall of the mixing device hardens and interferes with the stirring blade, resulting in the problem of damage to the device.
Description
Technical Field
The utility model relates to the technical field of building construction equipment, in particular to a concrete mixing device for building construction.
Background
The concrete is an artificial stone which is prepared by taking cement as a main cementing material, mixing with water, sand and cobble, doping chemical additives and mineral admixtures when necessary, mixing according to a proper proportion, uniformly stirring, compacting, forming, curing and hardening, and is mainly divided into two stages and states: the plastic state before setting and hardening, i.e. fresh concrete or concrete mix, and the hard state after hardening, i.e. hardened concrete or concrete.
In the building construction process, concrete is mainly prepared by using a concrete mixing device.
The existing concrete mixing device for building construction gradually exposes the defects in the use process, and mainly shows the following aspects:
first, after adding the admixture into cement, the pivoted stirring vane in the mixing arrangement mixes stirring cement and admixture because cement is comparatively thick, and the middle part position between two adjacent stirring vane, the material stirs the range less, leads to the admixture of adding to gather in this position easily for concrete mixing quality is not good.
Secondly, after the cement and the admixture are stirred in the mixing device, the material is discharged through the material discharging pipe, a plurality of concretes are adhered to the inner wall of the mixing device after the material is discharged, the concretes are hardened after a period of time, the hardened concretes on the inner wall of the mixing device are thicker and thicker along with continuous use of the device, and the inner space of the mixing device is gradually reduced until the hardened concretes interfere with the stirring blades, so that the device is damaged.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of utility model
Aiming at the defects in the prior art, the technical problem to be solved by the utility model is to provide a concrete mixing device for building construction, the device can realize stirring the materials at all positions in the inner space, and the stirring effect is improved;
The device can also be used for cleaning the concrete attached to the inner wall rapidly.
In order to solve the problems, the utility model provides the following technical scheme:
The concrete mixing device for the building construction comprises a stirring kettle body which is fixedly arranged, wherein a stirring assembly is arranged in the stirring kettle body, and a cleaning assembly is arranged on the stirring assembly;
The stirring assembly can uniformly stir materials at all positions in the internal space of the stirring kettle body; the cleaning component can be used for rapidly cleaning the concrete attached to the inner wall of the stirring kettle body;
The stirring assembly comprises a driving shaft which is rotationally arranged, two groups of stirring blades which are symmetrically arranged along the axial section of the driving shaft are fixedly arranged on the outer wall of the driving shaft, a plurality of stirring blades in each group are uniformly distributed along the axial line of the driving shaft,
The driving shaft is also vertically arranged in a reciprocating sliding manner.
As an optimized scheme, one end of the driving shaft penetrates through the stirring kettle body to extend to the outside, a vertically lifting sleeve ring is sleeved on the outer wall of the driving shaft outside the stirring kettle body, and the sleeve ring is rotationally connected with the driving shaft.
As an optimized scheme, the top of the stirring kettle body is fixedly provided with two limiting plates, a lifting plate is vertically arranged between the two limiting plates in a sliding manner, opposite side walls of the lifting plate are respectively connected with the two limiting plates in a sliding manner,
The lantern ring is fixedly connected with the end part of the lifting plate.
As an optimized scheme, a second driving motor is vertically arranged above the stirring kettle body in a sliding manner, and the output end of the second driving motor is fixedly connected with the driving shaft.
As an optimized solution, the cleaning assembly comprises a horizontally slidingly arranged scraper blade which is slidingly connected to two of the stirring blades of one set.
As an optimized scheme, the end parts of the two stirring blades are provided with sliding plates in a sliding manner, and the two sliding plates are fixedly connected with the side wall of the scraping plate.
As an optimized scheme, two lifting rings which are arranged in a synchronous sliding manner are sleeved on the driving shaft, swinging plates are hinged to the outer walls of the lifting rings, and swinging ends of the swinging plates are hinged to the sliding plates.
As an optimized scheme, an arc triangular plate is vertically lifted below the driving shaft and is further arranged along the axis of the driving shaft in a rotating mode.
As an optimized scheme, the bottom of the stirring kettle body is penetrated with a rotary circular plate which is arranged along the axis of the driving shaft in a rotating way.
As an optimized scheme, the bottom of the arc triangular plate is fixedly connected with a movable plate, a single-tooth screw rod in threaded connection with the movable plate is inserted on the rotary circular plate, and one end of the Shan Ya screw rod extends into the stirring kettle body and is in rotary connection with the movable plate.
Compared with the prior art, the utility model has the beneficial effects that:
1. the stirring assembly can uniformly stir the materials in all positions in the space in the stirring kettle body, so that the stirring effect of concrete is improved;
2. Residual concrete on the inner wall of the stirring kettle body can be cleaned rapidly through the cleaning assembly.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic structural view of the stirring assembly of the present utility model;
FIG. 3 is a schematic view of a lifting plate according to the present utility model;
FIG. 4 is a schematic view of a sliding circular plate according to the present utility model;
FIG. 5 is a schematic view of a lifting ring according to the present utility model;
fig. 6 is a schematic structural view of the rotary disk of the present utility model.
In the figure: 1-stirring a kettle body; 2-feeding pipe; 3-a first drive motor; 4-a second drive motor; 5-a motor bracket; 6-fixing plates; 7-supporting plates; 8-supporting columns; 9-discharging pipe; 10-driving shaft; 11-stirring blades; 12-cleaning the assembly; 13-arc triangle; 14-rotating the circular plate; 15-rotating the sealing ring; 16-a guide rod; 17-a hand wheel; 18-a single-tooth screw rod; 19-a moving plate; 20-a stirring assembly; 21-lifting plates; 22-limiting plates; 23-a turntable; 24-collar; 25-guide posts; 26-a first rectangular slot; 27-scraping plate; 28-compressing the spring; 29-a slide plate; 30-swinging plates; 31-a circular groove; 32-sliding circular plate; 33-connecting blocks; 34-lifting ring; 35-a second rectangular groove; 36-arc-shaped connecting plates.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
As shown in fig. 1 to 6, a concrete mixing device for building construction comprises a stirring kettle body 1 which is fixedly arranged, wherein a stirring assembly 20 is arranged in the stirring kettle body 1, and a cleaning assembly 12 is arranged on the stirring assembly 20;
The stirring assembly 20 can uniformly stir the materials at all positions in the inner space of the stirring kettle body 1; the cleaning component 12 can quickly clean the concrete attached to the inner wall of the stirring kettle body 1;
The stirring assembly 20 comprises a driving shaft 10 which is rotatably arranged, two groups of stirring blades 11 which are symmetrically arranged along the axial section of the driving shaft 10 are fixedly arranged on the outer wall of the driving shaft 10, a plurality of stirring blades 11 in each group are uniformly distributed along the axial line of the driving shaft 10,
The driving shaft 10 is also vertically arranged in a reciprocating sliding manner;
The driving shaft 10 which rotates and vertically reciprocates to drive the stirring blade 11 to rotate along the axis of the driving shaft 10, and simultaneously drives the stirring blade 11 to vertically reciprocate to slide,
The vertical reciprocating sliding distance of the stirring blades 11 is greater than the distance between the two stirring blades 11, and the bottom surface of the stirring blade 11 positioned at the lowest part can be in friction contact with the inner bottom surface of the stirring kettle body 1, so that the materials in all positions of the inner space of the stirring kettle body 1 are uniformly stirred.
One end of the driving shaft 10 penetrates through the stirring kettle body 1 to extend to the outside, a lantern ring 24 which is vertically lifted is sleeved on the outer wall of the driving shaft 10 positioned outside the stirring kettle body 1, and the lantern ring 24 is rotationally connected with the driving shaft 10.
The collar 24 has an outer diameter equal to the diameter of the drive shaft 10, and the inner wall of the collar 24 extends inwardly into frictional contact with the outer wall of the drive shaft 10.
Two limiting plates 22 are fixedly arranged at the top of the stirring kettle body 1, a lifting plate 21 is vertically arranged between the two limiting plates 22 in a sliding manner, opposite side walls of the lifting plate 21 are respectively connected with the two limiting plates 22 in a sliding manner,
The collar 24 is fixedly connected to the end of the lifter plate 21.
The side rotation of lifter plate 21 is equipped with carousel 23, and lifter plate 21 tip runs through and is equipped with first rectangular channel 26, and carousel 23 eccentric position is fixed to be equipped with guide pillar 25, and guide pillar 25 one end extends to in the first rectangular channel 26.
The stirring kettle body 1 top is fixed and is equipped with first driving motor 3, and stirring kettle body 1 top is still fixed and is equipped with backup pad 7, and first driving motor 3 output passes backup pad 7 and carousel 23 fixed connection.
T-shaped sliding plates are fixedly connected to the opposite side walls of the lifting plate 21, and T-shaped sliding grooves matched with the T-shaped sliding plates are formed in the ends, close to the two limiting plates 22.
The upper part of the stirring kettle body 1 is vertically and slidably provided with a second driving motor 4, and the output end of the second driving motor 4 is fixedly connected with a driving shaft 10.
The top of the stirring kettle body 1 is fixedly provided with a fixed plate 6, the end part of the fixed plate 6 is vertically provided with a motor bracket 5 in a sliding manner, and a second driving motor 4 is fixedly connected with the motor bracket 5.
The end part of the motor bracket 5 is fixedly connected with a T-shaped sliding plate, and the end part of the fixed plate 6 is fixedly connected with a T-shaped sliding groove matched with the T-shaped sliding plate.
The cleaning assembly 12 comprises a scraper 27 which is horizontally arranged in a sliding way, and the scraper 27 is connected with two stirring blades 11 in one group in a sliding way;
The bottom surface of the scraper 27 is flush with the bottom surface of the stirring blade 11 located at the lowest position, and the top surface of the scraper 27 is flush with the top surface of the stirring blade 11 located at the highest position.
The scraping plate 27 horizontally slides to be in friction contact with the inner wall of the stirring kettle body 1, and the stirring blade 11 drives the scraping plate 27 which is soaked to rotate so as to quickly clean the concrete on the inner wall of the stirring kettle body 1.
The ends of the two stirring blades 11 are provided with sliding plates 29 in a sliding manner, and the two sliding plates 29 are fixedly connected with the side walls of the scraping plates 27.
The driving shaft 10 is sleeved with two lifting rings 34 which are arranged in a synchronous sliding way, the outer walls of the lifting rings 34 are hinged with swinging plates 30, and the swinging ends of the swinging plates 30 are hinged with the sliding plates 29.
The two lifting rings 34 are fixedly connected through an arc-shaped connecting plate 36, and the inner wall of the arc-shaped fixing plate 6 is in friction and offset with the outer wall of the driving shaft 10.
A circular groove 31 is arranged at the inner bottom of the driving shaft 10, and a sliding circular plate 32 is vertically arranged in the circular groove 31 in a sliding manner.
A compression spring 28 is also fixedly arranged in the circular groove 31, and two ends of the compression spring 28 respectively prop against the sliding circular plate 32 and the inner top surface of the driving shaft 10.
The outer wall of the driving shaft 10 is provided with a second rectangular groove 35 communicated with the circular groove 31, the side wall of the sliding circular plate 32 is fixedly connected with a connecting block 33, and one end of the connecting block 33 penetrates through the second rectangular groove 35 to be fixedly connected with the inner wall of the arc-shaped connecting plate 36.
The ends of the two sliding plates 29 are fixedly connected with T-shaped sliding plates, and the ends of the two stirring blades 11 are provided with T-shaped sliding grooves matched with the T-shaped sliding plates.
An arc triangular plate 13 is vertically lifted below the driving shaft 10, and the arc triangular plate 13 is also rotationally arranged along the axis of the driving shaft 10;
The arc triangular plate 13 rises to prop against the bottom of the lifting ring 34 below and push the two lifting rings 34 to rise simultaneously until the scraping plate 27 is in friction contact with the inner wall of the stirring kettle body 1, the stirring blades 11 rotate and drive the arc triangular plate 13 and the scraping plate 27 to rotate, the arc triangular plate 13 continuously limits the lifting ring 34, and the scraping plate 27 cleans the inner wall of the stirring kettle body 1;
The arc triangle 13 descends, the compression spring 28 drives the lifting ring 34 to descend, and the scraping plate 27 resets.
The inner wall of the curved triangle 13 may be in frictional contact with the outer wall of the drive shaft 10, and the maximum sweep angle of the curved triangle 13 is smaller than the included angle between the two sets of stirring vanes 11.
The rotary circular plate 14 which is rotatably arranged along the axis of the driving shaft 10 penetrates through the bottom of the stirring kettle body 1.
The rotary circular plate 14 is sleeved with a rotary sealing ring 15 fixedly connected with the outer wall of the rotary circular plate, and the outer wall of the rotary sealing ring 15 is fixedly connected with the stirring kettle body 1.
The bottom of the arc triangle 13 is fixedly connected with a moving plate 19, a single-tooth screw rod 18 in threaded connection with the rotating circular plate 14 is inserted on the rotating circular plate 14, and one end of the single-tooth screw rod 18 extends into the stirring kettle body 1 and is in rotary connection with the moving plate 19.
The side wall of the moving plate 19 is arranged along with the inner wall of the arc triangle 13.
The other end of the single-tooth screw rod 18 extends to the outside of the stirring kettle body 1 and is fixedly connected with a hand wheel 17.
The rotary seal ring 16 is fixedly connected to the bottom of the moving plate 19, and one end of the rotary seal ring 16 extends to the outside through the rotary circular plate 14.
The fixed inlet pipe 2 that is equipped with of stirring cauldron body 1 top intercommunication its inner chamber, the fixed row material pipe 9 that is equipped with of stirring cauldron body 1 bottom intercommunication its inner chamber, row material pipe 9 still slope setting.
The bottom of the stirring kettle body 1 is also fixedly provided with a plurality of evenly distributed support columns 8.
The working principle of the device is as follows:
Before concrete is prepared, cement and admixture are added into the stirring kettle body 1 through the feed pipe 2, the second driving motor 4 is started to drive the driving shaft 10 and the stirring blades 11 to rotate, the first driving motor 3 is started to drive the rotary table 23 to rotate, the rotary table 23 drives the guide posts 25 to rotate, and then the lifting plate 21 is controlled to vertically reciprocate along the limiting plates 22, so that the lantern ring 24 is controlled to vertically reciprocate, the lantern ring 24 drives the driving shaft 10 and the stirring blades 11 to vertically reciprocate, and the stirring blades 11 which rotate and vertically reciprocate are used for uniformly stirring materials at all positions in the inner space of the stirring kettle body 1, and the mixing effect of the admixture in the concrete is improved;
after stirring is completed, the concrete in the stirring kettle body 1 is discharged through the discharge pipe 9, the first driving motor 3 is started to drive the stirring blade 11 to move to the lowest position, the first driving motor 3 is closed, the bottom surface of the stirring blade 11 positioned at the lowest position is in friction contact with the stirring kettle body 1, the rotary circular plate 14 is rotated to adjust the position of the arc-shaped triangular plate 13, the rotary hand wheel 17 drives the single-tooth screw 18 to rotate, the arc-shaped triangular plate 13 is further controlled to rise to abut against the bottom of the lower lifting ring 34, the arc-shaped triangular plate 13 continues to rise, the two lifting rings 34 synchronously slide upwards, the compression spring 28 is compressed, the sliding plate 29 and the scraping plate 27 are driven to horizontally slide under the cooperation of the swinging plate 30 until the scraping plate 27 abuts against the inner wall of the stirring kettle body 1, the second driving motor 4 is started to drive the stirring blade 11 to rotate, the stirring blade 11 abuts against the arc-shaped triangular plate 13 and drive the stirring blade 11 to rotate, the stirring blade 11 simultaneously drives the scraping plate 27 to rotate to clear the inner wall of the stirring kettle body 1, the cleaned concrete is discharged through the discharge pipe 9, and the residual concrete on the inner wall of the stirring kettle body 1 is quickly cleared, and the stirring blade 11 is prevented from being damaged due to collision with hardened equipment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. The utility model provides a concrete mixing arrangement for construction which characterized in that: the stirring kettle comprises a stirring kettle body (1) which is fixedly arranged, wherein a stirring assembly (20) is arranged in the stirring kettle body (1), and a cleaning assembly (12) is arranged on the stirring assembly (20);
The stirring assembly (20) can uniformly stir the materials in all positions in the inner space of the stirring kettle body (1); the cleaning component (12) can be used for rapidly cleaning the concrete attached to the inner wall of the stirring kettle body (1);
The stirring assembly (20) comprises a driving shaft (10) which is rotationally arranged, two groups of stirring blades (11) which are symmetrically arranged along the axial section of the driving shaft (10) are fixedly arranged on the outer wall of the driving shaft (10), a plurality of stirring blades (11) in each group are uniformly distributed along the axial line of the driving shaft (10),
The driving shaft (10) is also vertically arranged in a reciprocating sliding manner.
2. A concrete mixing apparatus for construction according to claim 1, wherein: one end of the driving shaft (10) penetrates through the stirring kettle body (1) to extend to the outside, a sleeve ring (24) which is vertically lifted is sleeved on the outer wall of the driving shaft (10) positioned outside the stirring kettle body (1), and the sleeve ring (24) is rotationally connected with the driving shaft (10).
3. A concrete mixing apparatus for construction according to claim 2, wherein: two limiting plates (22) are fixedly arranged at the top of the stirring kettle body (1), lifting plates (21) are vertically arranged between the two limiting plates (22) in a sliding manner, opposite side walls of the lifting plates (21) are respectively connected with the two limiting plates (22) in a sliding manner,
The lantern ring (24) is fixedly connected with the end part of the lifting plate (21).
4. A concrete mixing apparatus for construction according to claim 3, wherein: the upper part of the stirring kettle body (1) is vertically and slidably provided with a second driving motor (4), and the output end of the second driving motor (4) is fixedly connected with a driving shaft (10).
5. The concrete mixing device for building construction according to claim 4, wherein: the cleaning assembly (12) comprises a horizontally slidingly disposed scraper (27), the scraper (27) being slidingly coupled to two of the set of stirring blades (11).
6. The concrete mixing device for building construction according to claim 5, wherein: the ends of the two stirring blades (11) are provided with sliding plates (29) in a sliding manner, and the two sliding plates (29) are fixedly connected with the side wall of the scraping plate (27).
7. The concrete mixing device for building construction according to claim 6, wherein: the driving shaft (10) is sleeved with two lifting rings (34) which are arranged in a synchronous sliding mode, the outer walls of the lifting rings (34) are hinged to swinging plates (30), and the swinging ends of the swinging plates (30) are hinged to sliding plates (29).
8. The concrete mixing device for building construction according to claim 7, wherein: an arc triangular plate (13) is vertically arranged below the driving shaft (10) in a lifting mode, and the arc triangular plate (13) is further arranged in a rotating mode along the axis of the driving shaft (10).
9. The concrete mixing device for building construction according to claim 8, wherein: the bottom of the stirring kettle body (1) is penetrated with a rotary circular plate (14) which is arranged along the axis of the driving shaft (10) in a rotating way.
10. The concrete mixing device for building construction according to claim 9, wherein: the bottom of arc set square (13) rigid coupling has movable plate (19), rotatory plectane (14) go up cartridge have rather than threaded connection's single tooth lead screw (18), shan Ya lead screw (18) one end extend to inside stirring cauldron body (1), and with movable plate (19) rotation is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323037056.8U CN221021709U (en) | 2023-11-09 | 2023-11-09 | Concrete mixing device for construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323037056.8U CN221021709U (en) | 2023-11-09 | 2023-11-09 | Concrete mixing device for construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221021709U true CN221021709U (en) | 2024-05-28 |
Family
ID=91167029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323037056.8U Active CN221021709U (en) | 2023-11-09 | 2023-11-09 | Concrete mixing device for construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221021709U (en) |
-
2023
- 2023-11-09 CN CN202323037056.8U patent/CN221021709U/en active Active
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