CN215798692U - Three-section type rotating device for biological rotating disc - Google Patents
Three-section type rotating device for biological rotating disc Download PDFInfo
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- CN215798692U CN215798692U CN202121991300.2U CN202121991300U CN215798692U CN 215798692 U CN215798692 U CN 215798692U CN 202121991300 U CN202121991300 U CN 202121991300U CN 215798692 U CN215798692 U CN 215798692U
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model relates to a three-section type rotating device for a biological rotating disc, which comprises a rotating shaft, a rotating disc and a reinforcing rib welding piece, wherein the rotating disc is fixedly connected to the outer side of the rotating shaft through a reaming bolt, and the rotating disc and the rotating shaft are arranged concentrically; the turnplates comprise two outer turnplates and two inner turnplates, the two outer turnplates are respectively arranged at two ends of the rotating shaft, and the two inner turnplates are uniformly arranged in the middle of the rotating shaft; the strengthening rib seam piece includes outer strengthening rib seam piece and interior strengthening rib seam piece, interior strengthening rib seam piece is connected between two inner turntables, and outer strengthening rib seam piece is connected between inner turntable and outer turntable.
Description
Technical Field
The utility model belongs to the technical field of environmental protection equipment, and particularly relates to a three-section type rotating device for a biological rotating disc.
Background
The modern biomembrane method water treatment technology is widely applied to sewage treatment processes in various industries and has the advantages of economy, environmental protection, good treatment effect and high treatment efficiency. With the development of modern industrial technology and the improvement of the living standard of people, the sewage treatment requirement and the standard of reaching the standard are increasingly improved, and in order to adapt to the requirement of a new form, an old water treatment plant needs to be upgraded and modified, or a newly-built water plant adopts large-scale treatment capacity design. This puts higher demands on the biological rotating disk and the related equipment, which are embodied as follows: the biological treatment load is increased, the weight of the biological rotating disc is increased, or the number of the rotating discs is increased, which all provide a severe test for the stress performance of the rotating shaft of the existing biological rotating disc.
Original three-dimensional rotation type reticular contact rotary assembly is mostly two segmentation full welded structure, comprises transmission shaft and epaxial outside fixed disk and central fixed disk thereof, and central fixed disk both sides have welded deep floor along the circumferencial direction, and biological contact passes through fixed axle and annex and is fixed to between outside fixed disk and the central fixed disk.
The three-dimensional rotary type reticular contact body turntable assembly generally adopts an all-welded structure form, and a plurality of reinforcing rib plates are used for reinforcing the welding firmness, so that the welding stress concentration is easily generated at the welding position due to the large welding area. In order to ensure the strength of the turntable, the low-alloy high-strength structural steel Q355 is selected as the material, although the strength is improved, in the welding and cooling process of the Q355 steel, a heat affected zone is easy to form quenched structures-martensite, so that the hardness of a near seam zone is improved, but the plasticity is reduced, and the cold crack tendency is larger. In order to reduce welding residual stress, reduce the hydrogen content in a welding seam and improve the metal structure and the performance of the welding seam, the welding seam is preferably subjected to stress relief heat treatment after welding, but the welding seam is of a full-welding structure and has a large volume, so that the welding seam is difficult to realize. Meanwhile, the central fixed disk is welded at the position with the maximum bending moment in the middle of the transmission shaft, so that the transmission shaft is not stressed well. When the mud hanging amount of a contact body is increased to a certain degree or the contact body runs in an overload mode, the faults such as premature fatigue fracture of a main shaft, welding failure of a fixed disc and the like are easily caused due to the welding stress concentration at the reinforcing rib plate in the middle of the transmission shaft and the defects such as cold cracks, delayed cracks and the like generated during welding.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides a three-section type rotating device for a biological rotating disc, which comprises a rotating shaft, a rotating disc and a reinforcing rib welding piece, wherein the rotating disc is fixedly connected to the outer side of the rotating shaft through a reaming hole bolt, and the rotating disc and the rotating shaft are arranged concentrically;
the turnplates comprise two outer turnplates and two inner turnplates, the two outer turnplates are respectively arranged at two ends of the rotating shaft, and the two inner turnplates are uniformly arranged in the middle of the rotating shaft;
the strengthening rib seam piece includes outer strengthening rib seam piece and interior strengthening rib seam piece, interior strengthening rib seam piece is connected between two inner turntables, and outer strengthening rib seam piece is connected between inner turntable and outer turntable.
Optionally, a connecting disc is arranged on the outer side of the rotating shaft, and the connecting disc and the rotating shaft are arranged concentrically and welded on the outer side of the rotating shaft; the connecting discs comprise two outer disc connecting discs and two inner disc connecting discs, the positions of the two outer disc connecting discs respectively correspond to the two outer rotating discs, and the positions of the two inner disc connecting discs respectively correspond to the two inner rotating discs.
Optionally, the connecting disc and the rotary disc at the corresponding position are positioned by adopting a spigot and are fixedly connected through a hinged hole bolt.
Optionally, the carousel is equipped with the bellying of a plurality of outside protrusion along circumference, the bellying that corresponds of the adjacent carousel of both ends difference fixed connection of strengthening rib seam piece.
Further optionally, an outer reinforcing rib welding piece is connected between the protruding portions of the corresponding positions of the outer rotating disc and the inner rotating disc, the outer reinforcing rib welding piece is of a rod-shaped structure, one end of the outer reinforcing rib welding piece is connected with the protruding portion of the outer rotating disc, and the other end of the outer reinforcing rib welding piece is connected with the protruding portion of the inner rotating disc.
Further optionally, an inner reinforcing rib welding piece is connected between the protruding parts of the corresponding positions of the two inner rotary discs, the inner reinforcing rib welding piece is of a rod-shaped structure, one end of the inner reinforcing rib welding piece is connected with the protruding part of each inner rotary disc, and the other end of the inner reinforcing rib welding piece is connected with the protruding part of each adjacent inner rotary disc.
Optionally, the rotating shaft comprises a driving shaft head, a driven shaft head and a rotating shaft main body, the driving shaft head and the driven shaft head are respectively and fixedly connected with two ends of the rotating shaft main body, and the driving shaft head and the driven shaft head are concentrically arranged with the rotating shaft main body; the driving shaft head is fixedly connected with the front end of the rotating shaft main body through a first connecting portion, and the driven shaft head is fixedly connected with the rear end of the rotating shaft main body through a second connecting portion.
Optionally, first connecting portion include first support ring, the first strengthening rib of a plurality of and second support ring, first support ring and second support ring cup joint in the outside of initiative spindle nose in proper order, first strengthening rib is established between first support ring and second support ring to circumference evenly distributed along the initiative spindle nose.
The second connecting part has the same structure as the first connecting part.
Optionally, two ends of the rotating shaft main body are respectively provided with an outer disc connecting disc, and the outer disc connecting discs are sleeved on the outer side of the rotating shaft main body and are connected in a welding mode and used for being connected with the outer rotating disc.
Optionally, the inner disc connecting disc is sleeved on the outer side of the middle part of the rotating shaft main body and is connected with the rotating shaft main body in a welding mode; the two inner disc connecting discs divide the main body part of the rotating shaft between the two outer disc connecting discs into three sections and are used for connecting the inner discs.
The three-section type rotating device for the biological rotating disc has the following beneficial effects:
(1) the connecting disc on the rotating shaft main body and the turntable are positioned by a spigot and connected by a reamed hole bolt, so that the connection is stable and reliable, the welding area of the connecting disc and the turntable is reduced, and no additional stress is generated; meanwhile, the installation space of the rotating shaft main body is improved into three sections from two sections, and the turntable is far away from the center of the rotating shaft main body, so that the stress condition of the rotating shaft main body is greatly improved;
(2) 4 flange type connecting discs are welded on the rotating shaft main body, symmetrical fillet welding is adopted for welding seams, two sides of a welding robot can be used for welding at the same time, the generation of welding stress can be well controlled, meanwhile, the space size is reduced due to the fact that only 4 flange type connecting discs are welded, stress relief heat treatment can be easily achieved, the possibility of generation of cold cracks and delayed cracks is almost reduced to zero, and the mechanical comprehensive performance of the rotating shaft is improved;
drawings
Fig. 1 is a structural view of the three-stage rotating device for a biological rotating disk.
Fig. 2 is a cross-sectional view of a-a in fig. 1.
Fig. 3 is a sectional view of the rotating shaft.
Fig. 4 is a side view of the rotating shaft.
In the figure, 1-rotating shaft, 2-rotating disc, 201-outer rotating disc, 202-inner rotating disc, 3-reinforcing rib welding part, 301-outer reinforcing rib welding part, 302-inner reinforcing rib welding part, 4-reamed hole bolt, 5-outer disc connecting disc, 6-inner disc connecting disc, 7-bulge, 8-through hole, 9-driving shaft head, 10-driven shaft head, 11-rotating shaft body, 12-first connecting part, 1201-first supporting ring, 1202-second supporting ring, 1203-first reinforcing rib, 13-second connecting part, 1301-third supporting ring, 1302-fourth supporting ring, 1303-second reinforcing rib and 14-through hole.
Detailed Description
The three-section type biological rotating disc rotating device comprises a rotating shaft 1, a rotating disc 2 and a reinforcing rib welding piece 3, wherein the rotating disc 2 is fixedly connected to the outer side of the rotating shaft 1 through a reamed hole bolt 4, and the rotating disc 2 and the rotating shaft 1 are arranged concentrically;
the turntable 1 comprises two outer turntables 201 and two inner turntables 202, the two outer turntables 201 are respectively arranged at two ends of the rotating shaft 1, and the two inner turntables 202 are uniformly arranged in the middle of the rotating shaft 1;
the stiffener seam piece 3 includes outer stiffener seam piece 301 and inner stiffener seam piece 302, inner stiffener seam piece 302 is connected between two inner turntables 202, and outer stiffener seam piece 301 is connected between inner turntables 202 and outer turntables 201.
Optionally, a connecting disc is arranged on the outer side of the rotating shaft 1, and the connecting disc and the rotating shaft 1 are arranged concentrically and welded on the outer side of the rotating shaft 1; the connecting discs comprise two outer disc connecting discs 5 and two inner disc connecting discs 6, the positions of the two outer disc connecting discs 5 correspond to the two outer discs 201 respectively, and the positions of the two inner disc connecting discs 6 correspond to the two inner discs 202 respectively.
Optionally, the connecting discs at the corresponding positions and the turntables 2 are positioned by using rabbets and are fixedly connected by using the hinge hole bolts 4, that is, the two outer disc connecting discs 5 respectively correspond to the two outer turntables 201 and are connected by using the rabbets and the hinge hole bolts; the two inner disk connecting disks 6 respectively correspond to the two inner disks 202, and are in spigot positioning and reamed hole bolt connection.
Optionally, the turntable 2 is provided with a plurality of outward convex protrusions 7 along the circumferential direction, and the two ends of the reinforcing rib welding piece 3 are respectively fixedly connected with the corresponding protrusions 7 of the adjacent turntable 2.
In one embodiment of the utility model, the turntable 2 is uniformly provided with six protrusions 7 along the circumferential direction, the included angle between two adjacent protrusions 7 is 60 degrees, and the end part of the reinforcing rib welding piece 3 is connected with the protrusions 7 by using a bolt pair; carousel 2 forms sunk structure between two adjacent bellying 7 for carousel 2 lightens the quality under the prerequisite of guaranteeing the performance, reduces carousel 2's moment of inertia, improves the atress operating mode.
Further optionally, an outer reinforcement welding piece 301 is connected between the outer turnplate 201 and the protruding portion 7 of the corresponding position of the inner turnplate 202 by using a bolt pair, the outer reinforcement welding piece 301 is a rod-shaped structure, one end of the outer reinforcement welding piece is connected with the protruding portion of the outer turnplate 201, and the other end of the outer reinforcement welding piece is connected with the protruding portion of the inner turnplate 202.
Further optionally, a bolt pair is used to connect the inner reinforcing rib welding part 302 between the protruding parts 7 of the two corresponding positions of the inner rotary disk 202, the inner reinforcing rib welding part 302 is a rod-shaped structure, one end of the inner reinforcing rib welding part is connected with the protruding part of the inner rotary disk 202, and the other end of the inner reinforcing rib welding part is connected with the protruding part of the adjacent inner rotary disk 202.
In one embodiment of the present invention, the outer turntable 201 and the inner turntable 202 are both provided with six protrusions 7 uniformly along the circumferential direction, and the included angle between two adjacent protrusions 7 on the same turntable is 60 degrees; the outer reinforcing rib welding piece 301 is connected between the convex parts 7 at the corresponding positions of the outer turnplate 201 and the inner turnplate 202 by bolts, namely six outer reinforcing rib welding pieces 301 are connected between the outer turnplate 201 and the inner turnplate 202; the inner reinforcing rib welding parts 302 are connected between the convex parts 7 at the corresponding positions of the two inner rotary discs 202 by bolts, namely, six inner reinforcing rib welding parts 302 are connected between the two inner rotary discs 202; that is, the side of the protruding portion of the inner dial 202 facing the adjacent outer dial 201 is connected to the outer rib seam 301, and the side facing the adjacent inner dial 202 is connected to the inner rib seam 302.
Optionally, the turntable 2 is provided with a plurality of through holes 8, the through holes 8 are uniformly distributed along the circumferential direction of the turntable 2 and are concentrically arranged with the turntable 2, so that the weight of the turntable 2 is further reduced, the inertia moment of the turntable 2 is reduced, the stress working condition is improved, the load bearing capacity of the turntable 2 is greatly improved, the welding stress is reduced, and the service life of the turntable is further prolonged.
Optionally, the rotating shaft 1, as shown in fig. 3-4, includes a driving shaft head 9, a driven shaft head 10 and a rotating shaft main body 11, where the driving shaft head 9 and the driven shaft head 10 are respectively and fixedly connected to two ends of the rotating shaft main body 11, and the driving shaft head 9 and the driven shaft head 10 are concentrically arranged with the rotating shaft main body 11;
the driving shaft head 9 is fixedly connected with the front end of the rotating shaft main body 11 through a first connecting part 12, and the driven shaft head 10 is fixedly connected with the rear end of the rotating shaft main body 11 through a second connecting part 13.
Optionally, the rotating shaft main body 11 is of a hollow barrel structure, so that the overall weight of the three-section type biological rotating disc rotating device can be obviously reduced, and the weight load can be reduced; the rear end of the driving shaft head 9 is inserted into the front end of the hollow cylinder, the front end of the driven shaft head 10 is inserted into the rear end of the hollow cylinder, and the driving shaft head 9 and the driven shaft head 10 are fixedly connected with the inner wall of the hollow cylinder.
In order to adapt to various severe working conditions, the wall thickness of the rotating shaft main body 11 is 20-25 mm.
Optionally, the driving shaft head 9 and/or the driven shaft head 10 may be externally provided with a bolt hole and/or a stepped clamping structure connected with an external driving device.
Optionally, the first connecting portion 12 includes a first support ring 1201, a plurality of first reinforcing ribs 1203 and a second support ring 1202, the first support ring 1201 and the second support ring 1202 are sequentially sleeved on the outer side of the driving shaft head 9, and the first reinforcing ribs 1203 are disposed between the first support ring 1201 and the second support ring 1202 and are uniformly distributed along the circumferential direction of the driving shaft head 9.
In an embodiment of the present invention, the first connecting portion 12 includes four first reinforcing ribs 1203, the first reinforcing ribs 1203 have a rectangular parallelepiped structure, and the length directions of the first reinforcing ribs 1203 are respectively directed to the first support ring 1201 and the second support ring 1202.
Optionally, the second support ring 1202 is located near the rear end of the driving axle head 9, and when the rear end of the driving axle head 9 is inserted into the front end of the main body 11 of the rotating axle, the first support ring 1201 is located near the front end of the main body 11 of the rotating axle.
Optionally, the first reinforcing ribs 1203 are all welded on the outer side of the driving spindle head 9, and the first support ring 1201 and the second support ring 1202 are both welded on the outer side of the driving spindle head 9 and the inner wall of the rotating shaft main body 11.
Optionally, the first support ring 1201 and the second support ring 1202 are in interference fit with the rotating shaft body 11.
The second connection portion 13 has the same structure as the first connection portion 12. Specifically, the second connecting portion 13 includes a third support ring 1301, a plurality of second reinforcing ribs 1303 and a fourth support ring 1302, the third support ring 1301 and the fourth support ring 1302 are sequentially sleeved on the outer side of the driven shaft head 10, and the second reinforcing ribs 1303 are arranged between the third support ring 1301 and the fourth support ring 1302 and are uniformly distributed along the circumferential direction of the driven shaft head 10.
In an embodiment of the present invention, the second connection portion 13 includes four second reinforcing ribs 1303, the second reinforcing ribs 1303 have a rectangular parallelepiped structure, and the length directions of the second reinforcing ribs 1303 are respectively directed to the third support ring 1301 and the fourth support ring 1302.
Alternatively, the fourth support ring 1302 is located near the front end of the driven shaft head 10, and when the front end of the driven shaft head 10 is inserted into the rear end of the rotating shaft body 11, the third support ring 1301 is located near the rear end of the rotating shaft body 11.
Optionally, the second reinforcing ribs 1303 are welded to the outer side of the driven shaft head 10, and the third support ring 1301 and the fourth support ring 1302 are welded to the outer side of the driven shaft head 10 and the inner wall of the rotating shaft body 11.
Optionally, the third support ring 1301 and the fourth support ring 1302 are in interference fit with the rotating shaft body 11.
Optionally, a plurality of through holes 14 are formed in side walls of two ends of the rotating shaft main body 11, and the through holes 14 are used for welding and connecting the first support ring 1201, the second support ring 1202, the third support ring 1301, and the fourth support ring 1302 with an inner wall of the rotating shaft main body 11.
In an embodiment of the present invention, two sets of through holes 14 are respectively formed at both ends of the rotating shaft body 11 along the circumferential direction, each set includes six through holes, the positions of the two sets of through holes respectively correspond to the first support ring 1201, the second support ring 1202, the third support ring 1301 and the fourth support ring 1302, and after the driving stub shaft 9 and the driven stub shaft 10 are pressed into the rotating shaft body 11, plug welding is performed through the through holes 14, so that the first connecting portion 12 and the second connecting portion 13 are welded and fixed to the rotating shaft body 11.
Further optionally, two ends of the rotating shaft main body 11 are respectively provided with an outer disc connecting disc 5, and the outer disc connecting discs 5 are sleeved outside the rotating shaft main body 11 and are connected by welding to connect with the outer disc 201.
Further optionally, the inner disc connecting disc 6 is sleeved outside the middle part of the rotating shaft main body 11 and is connected with the rotating shaft main body in a welding manner; the two inner disk connecting disks 6 divide the rotating shaft main body 11 portion between the two outer disk connecting disks 5 equally into three sections for connecting the inner disk 202.
The end of each connecting disc and the rotary disc is positioned by a tool, after the relative position distance of the four connecting discs to the rotating shaft 1 and the concentricity of the connecting discs are ensured, the four rotary discs are respectively arranged on the corresponding connecting discs by a reaming bolt pair 4, then reinforcing rib welding pieces are arranged, and the four rotary discs are symmetrically welded by a welding robot at the same time, so that the distance and the concentricity between the rotary discs are ensured; after the rotating shaft 1 which is welded is subjected to heat treatment and stress removal, the driving shaft head 9 and the driven shaft head 10 at two ends are subjected to secondary finish machining, and the precision requirements of the shaft heads at two ends are met. And all assembly parts of the three-section type biological rotating disc rotating device are subjected to heavy anti-corrosion treatment, so that good anti-corrosion performance is ensured.
Claims (10)
1. A three-section type rotating device for a biological rotating disc is characterized by comprising a rotating shaft, a rotating disc and a reinforcing rib welding piece, wherein the rotating disc is fixedly connected to the outer side of the rotating shaft through a hinged hole bolt, and the rotating disc and the rotating shaft are arranged concentrically;
the turnplates comprise two outer turnplates and two inner turnplates, the two outer turnplates are respectively arranged at two ends of the rotating shaft, and the two inner turnplates are uniformly arranged in the middle of the rotating shaft;
the strengthening rib seam piece includes outer strengthening rib seam piece and interior strengthening rib seam piece, interior strengthening rib seam piece is connected between two inner turntables, and outer strengthening rib seam piece is connected between inner turntable and outer turntable.
2. The three-stage rotating device for biological rotating disc as claimed in claim 1, wherein the rotating shaft is provided with a connecting disc on the outer side, the connecting disc is concentric with the rotating shaft and is welded on the outer side of the rotating shaft;
the connecting discs comprise two outer disc connecting discs and two inner disc connecting discs, the positions of the two outer disc connecting discs respectively correspond to the two outer rotating discs, and the positions of the two inner disc connecting discs respectively correspond to the two inner rotating discs.
3. The device as claimed in claim 2, wherein the connection disc and the turntable at corresponding positions are positioned by using a spigot and are fixedly connected by a bolt with a hinged hole.
4. The device as claimed in claim 1, wherein the turntable is provided with a plurality of protrusions protruding outward along the circumferential direction, and the two ends of the welding member of the reinforcing rib are respectively fixedly connected to the corresponding protrusions of the adjacent turntable.
5. The apparatus as claimed in claim 4, wherein the outer reinforcing rib welded part is connected between the outer turntable and the corresponding protrusion of the inner turntable, and the outer reinforcing rib welded part is of a rod-shaped structure with one end connected to the protrusion of the outer turntable and the other end connected to the protrusion of the inner turntable.
6. The three-stage rotating device for biological rotating disc as claimed in claim 4, wherein the inner rib welding piece is connected between the corresponding protruding parts of the two inner rotating discs, and the inner rib welding piece is of a rod-shaped structure, one end of the inner rib welding piece is connected with the protruding part of the inner rotating disc, and the other end of the inner rib welding piece is connected with the protruding part of the adjacent inner rotating disc.
7. The three-section type biological rotating disc rotating device according to claim 2, wherein the rotating shaft comprises a driving shaft head, a driven shaft head and a rotating shaft main body, the driving shaft head and the driven shaft head are respectively and fixedly connected with two ends of the rotating shaft main body, and the driving shaft head and the driven shaft head are arranged concentrically with the rotating shaft main body;
the driving shaft head is fixedly connected with the front end of the rotating shaft main body through a first connecting portion, and the driven shaft head is fixedly connected with the rear end of the rotating shaft main body through a second connecting portion.
8. The rotating device of claim 7, wherein the rotating shaft body has an outer plate connecting plate at each end, and the outer plate connecting plate is mounted on the outer side of the rotating shaft body and welded to connect the outer plate.
9. The three-section type biological rotating disc rotating device according to claim 8, wherein the inner disc connecting disc is sleeved outside the middle part of the rotating shaft main body and is welded; the two inner disc connecting discs divide the main body part of the rotating shaft between the two outer disc connecting discs into three sections and are used for connecting the inner discs.
10. The three-section type biological rotating disc rotating device according to claim 9, wherein the first connecting portion comprises a first support ring, a plurality of first reinforcing ribs and a second support ring, the first support ring and the second support ring are sequentially sleeved on the outer side of the driving shaft head, and the first reinforcing ribs are arranged between the first support ring and the second support ring and are uniformly distributed along the circumferential direction of the driving shaft head;
the second connecting part has the same structure as the first connecting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121991300.2U CN215798692U (en) | 2021-08-24 | 2021-08-24 | Three-section type rotating device for biological rotating disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121991300.2U CN215798692U (en) | 2021-08-24 | 2021-08-24 | Three-section type rotating device for biological rotating disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215798692U true CN215798692U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121991300.2U Active CN215798692U (en) | 2021-08-24 | 2021-08-24 | Three-section type rotating device for biological rotating disc |
Country Status (1)
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| CN (1) | CN215798692U (en) |
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2021
- 2021-08-24 CN CN202121991300.2U patent/CN215798692U/en active Active
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