CN111686946A - Biological cell centrifuge speed limiting assembly and application thereof - Google Patents
Biological cell centrifuge speed limiting assembly and application thereof Download PDFInfo
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- CN111686946A CN111686946A CN202010571537.9A CN202010571537A CN111686946A CN 111686946 A CN111686946 A CN 111686946A CN 202010571537 A CN202010571537 A CN 202010571537A CN 111686946 A CN111686946 A CN 111686946A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/04—Cell isolation or sorting
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Abstract
The utility model provides a biological cell centrifuge speed limit subassembly and application thereof, relates to biological cell technical field, including the positioning seat, the inside of positioning seat is provided with the installation cavity, the inside swing joint of installation cavity has movable tooth piece, the outside of positioning seat is provided with speed limit mechanism, the inboard swing joint of movable tooth piece has reset spring. The speed limiting component of the biological cell centrifuge and the application thereof have the advantages that by the aid of stall prompt, after the stall phenomenon occurs and equipment runs to a preset time and stops, the stall phenomenon can be visually indicated by the aid of the structure of the speed limiting component, and experimenters can directly observe whether the rotating speed of cell tissues during centrifugation is correct through naked eyes and can judge whether sample data of the cell tissues are available. The method avoids data deviation caused by excessive centrifugation of cell tissues, improves the accuracy of experimental data, increases the reliability of biological cell detection and research results, and promotes the experimental process to a certain extent.
Description
Technical Field
The invention relates to the technical field of biological cells, in particular to a speed-limiting component of a biological cell centrifuge and application thereof.
Background
The biological cell technology belongs to a class in biology, and provides theoretical support for people to learn and understand cell diversity. Biological cell technology plays an important role in obtaining biological experiment data and conveniently identifying cell information.
Before the research on the biological cells, the biological cells need to be separated from the sample, and because the cells are composed of various substances and have relatively complex components, the cell extract is usually centrifuged by a centrifuge to obtain the required cell tissue and sample.
In the prior art, a cell tissue sample is generally placed in a test tube, and then the test tube is fixed on a test tube rack of a centrifuge, so that cell separation is realized by using centrifugal force of high-speed rotation. During this process, a runaway centrifuge speed may occur due to mechanical or program failure. When the centrifugal speed is too high, the generated centrifugal force is correspondingly increased, irreversible damage may be generated on cell tissues, data of cell tissue samples are invalid, correct experimental parameters cannot be obtained, and the research progress is seriously influenced. In addition, when the stall condition occurs and the worker cannot find out in time, after the equipment runs to the preset time and stops, the experimenter cannot know whether the sample is excessively centrifuged, if the excessively centrifuged cell sample is used by mistake, the failure of the whole experiment can be caused, the reliability of biological cell detection and research is seriously threatened, and great defects exist.
In order to solve the above problems, the inventor provides a speed limiting assembly of a biological cell centrifuge and an application thereof, which have stall self-locking and stall prompting functions.
Disclosure of Invention
In order to realize the purpose of stall self-locking and stall prompting, the invention provides the following technical scheme: a speed-limiting component of a biological cell centrifuge and application thereof comprise a positioning seat, a mounting cavity, a movable tooth block, a speed-limiting mechanism, a reset spring, a positioning groove, a lead, a positioning ring, a coil, a conductor, an electromagnetic device, a limiting frame, a limiting groove, a fixed contact, a movable contact, a connecting rod and a driven fluted disc.
The position and connection relation of the structures are as follows:
the positioning device comprises a positioning seat, a movable tooth block, a speed limiting mechanism, a return spring, a positioning groove, a lead, a positioning ring, a coil, a conductor and an electromagnetic device, wherein the positioning seat is arranged in the positioning seat;
the speed limiting mechanism comprises a limiting frame, a limiting groove is formed in the limiting frame, a fixed contact is connected to the inside of the limiting groove in a specified mode, a movable contact is movably connected to the inside of the limiting groove, a connecting rod is movably connected to the inside of the movable contact, and a driven fluted disc is connected to one end, far away from the movable contact, of the connecting rod in a specified mode.
Preferably, the five speed limiting mechanisms are electrically connected through leads; in the initial state, the movable contact is positioned in the middle of the limiting groove.
Preferably, the speed limiting mechanisms are provided with five groups, and the five groups of speed limiting mechanisms respectively correspond to the five movable tooth blocks.
Preferably, the shape of the conductor is a curved semi-ring, the specifications of the five conductors are the same, and the five conductors are electrically connected.
Preferably, in the initial state, the positions of the five movable tooth blocks are the same and are all on the same circle.
Preferably, in the initial state, the positions and the angles of the five groups of speed limiting mechanisms are the same, and the midpoints of the five groups of speed limiting mechanisms are on the same circle.
Compared with the prior art and products, the invention has the beneficial effects that:
1. the speed limiting component of the biological cell centrifuge and the application thereof can automatically carry out self-locking braking on the output part by utilizing the self structure to stop rotating when the stall phenomenon of equipment exceeds a rated value by the advantage of stall self-locking. The problem of overlarge centrifugal force possibly caused by the stalling phenomenon is prevented, the defect of damage to cell tissues caused by the overlarge centrifugal force can be further avoided, the correctness of cell tissue sample data is ensured, and the reliability of an experimental result provides powerful support.
2. The speed limiting component of the biological cell centrifuge and the application thereof have the advantages that by the aid of stall prompt, after the stall phenomenon occurs and equipment runs to a preset time and stops, the stall phenomenon can be visually indicated by the aid of the structure of the speed limiting component, and experimenters can directly observe whether the rotating speed of cell tissues during centrifugation is correct through naked eyes and can judge whether sample data of the cell tissues are available. The method avoids data deviation caused by excessive centrifugation of cell tissues, improves the accuracy of experimental data, increases the reliability of biological cell detection and research results, and promotes the experimental process to a certain extent.
Drawings
FIG. 1 is a cross-sectional view of a connection structure according to the present invention;
FIG. 2 is a schematic diagram of the movement traces of the structures in FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the connection structure of the speed limiting mechanism of the present invention;
FIG. 4 is a schematic diagram of the movement traces of the structures shown in FIG. 3 according to the present invention;
FIG. 5 is a schematic view of the speed limiting mechanism, the connecting structure of the wire and the coil according to the present invention;
FIG. 6 is a schematic view of a connection structure of the positioning seat, the mounting cavity, the positioning ring and the conductor according to the present invention.
In the figure: 1. positioning seats; 2. a mounting cavity; 3. a movable tooth block; 4. a speed limiting mechanism; 5. a return spring; 6. positioning a groove; 7. a wire; 8. a positioning ring; 9. a coil; 10. a conductor; 11. an electromagnetic device; 41. a limiting frame; 42. a limiting groove; 43. a fixed contact; 44. a movable contact; 45. a connecting rod; 46. a driven fluted disc;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-6:
the speed-limiting component of the biological cell centrifuge comprises a positioning seat 1, a mounting cavity 2, a movable tooth block 3, a speed-limiting mechanism 4, a return spring 5, a positioning groove 6, a lead 7, a positioning ring 8, a coil 9, a conductor 10, an electromagnetic device 11, a limiting frame 41, a limiting groove 42, a fixed contact 43, a movable contact 44, a connecting rod 45 and a driven fluted disc 46.
The initial positions and the connection relations of the structures are as follows:
an installation cavity 2 is arranged inside the positioning seat 1, a movable tooth block 3 is movably connected inside the installation cavity 2, a speed limiting mechanism 4 is arranged outside the positioning seat 1, a return spring 5 is movably connected inside the movable tooth block 3, a positioning groove 6 is arranged inside the installation cavity 2, a lead 7 is arranged outside the speed limiting mechanism 4, a positioning ring 8 is fixedly connected inside the positioning seat 1, a coil 9 is arranged outside the positioning ring 8, a conductor 10 is movably connected to the front side of the positioning ring 8, and an electromagnetic device 11 is movably connected inside the movable tooth block 3;
the speed limiting mechanism 4 comprises a limiting frame 41, a limiting groove 42 is arranged in the limiting frame 41, a fixed contact 43 is connected in the limiting groove 42 in a specified mode, a movable contact 44 is movably connected in the limiting groove 42, a connecting rod 45 is movably connected in the movable contact 44, and a driven fluted disc 46 is connected in one end, far away from the movable contact 44, of the connecting rod 45 in a specified mode.
Wherein:
a. the positioning seat 1 is annular, the number of the installation cavities 2 is five, the specifications of the installation cavities are the same, and the five installation cavities 2 are uniformly distributed by taking the circle center of the positioning seat 1 as a reference; and a reinforcing rib is arranged between the two adjacent mounting cavities 2 and in the positioning seat 1. The five speed limiting mechanisms 4 are electrically connected through leads 7; in the initial state, the movable contact 44 is located at the middle of the stopper groove 42.
b. The movable tooth block 3 is in a curved surface shape, teeth are arranged on the outer side of the movable tooth block, the movable tooth block is made of a magnetic material, and the magnetic pole is an N pole; the movable tooth blocks 3 are provided with five movable tooth blocks with the same specification, and the five movable tooth blocks 3 respectively correspond to the five installation cavities 2; the constant head tank 6 is provided with five groups altogether, every group includes three evenly distributed's slot-like structure, and five groups constant head tank 6 are located the inside of five installation cavity 2 respectively, and respectively with five movable tooth piece 3 sliding connection.
c. The coil 9 is mainly composed of an enameled wire, the enamel coating coated on the outer side of the enameled wire is required to be free of damage, the coil 9 is a whole complete enameled wire, and the size of the enameled wire is the same all the time.
d. A constant amount of current passing and magnetic induction lines are arranged in the coil 9, and the conductors 10 are all five, have the same specification and are uniformly distributed; the conductor 10 is perpendicular to the direction of magnetic induction of the coil 9. The speed limiting mechanisms 4 are provided with five groups, and the five groups of speed limiting mechanisms 4 respectively correspond to the five movable tooth blocks 3.
Wherein:
e. the electromagnetic devices 11 are provided with five electromagnetic devices 11, the five electromagnetic devices 11 respectively correspond to the five movable tooth blocks 3, the electromagnetic devices 11 are respectively electrically connected with the coil 9 and the conductor 10, and the electromagnetic devices 11 show magnetism and have N poles in a power-on state. The shape of the conductor 10 is a curved semi-ring, the specifications of the five conductors 10 are the same, and the five conductors 10 are electrically connected.
f. The coil 9 is not in direct contact with the positioning seat 1, a through groove is formed in the positioning seat 1, and the coil 9 is located in the through groove; the speed-limiting mechanisms 4 are provided with five groups with the same specification, the five groups of speed-limiting mechanisms 4 are electrically connected, and the fixed contact 43 and the movable contact 44 in the five groups of speed-limiting mechanisms 4 are electrically connected with the closing switch of the driving power supply.
g. The limiting frame 41 is in a curved surface structure, and the limiting grooves 42 are in the same shape as the limiting frame 41; the two fixed contacts 43 in the same group are arranged at the left end and the right end of the limiting groove 42; the movable contact 44 is curved and is located inside the stopper groove 42. In the initial state, the positions of the five movable tooth blocks 3 are the same and are all on the same circle.
h. A hollow structure is arranged in the movable contact 44, and the connecting rod 45 is inserted in the movable contact 44; the driven fluted disc 46 is semicircular, and teeth matched with the movable tooth block 3 are arranged on the outer side of the driven fluted disc; the center of the driven fluted disc 46 is provided with a rotating shaft, the axis of the connecting rod 45 is vertically distributed with the rotating shaft, and the connecting rod 45 is vertical to the horizontal plane of the driven fluted disc 46. In the initial state, the positions and the angles of the five groups of speed limiting mechanisms 4 are the same, and the midpoints of the five groups of speed limiting mechanisms are on the same circle.
When in use, the positioning ring 8 is movably connected with the output part of the centrifugal device, and when the output part rotates, the positioning ring 8 and the structure connected with the positioning ring are driven to synchronously rotate in the same direction. In the initial state, the movable tooth block 3 is located inside the mounting cavity 2 under the action of the tension of the return spring 5, does not extend out of the outer side of the positioning seat 1, and does not contact with the driven fluted disc 46, and at this time, the positioning ring 8 and the output part of the centrifugal device normally rotate.
In the process, the positioning ring 8 drives the positioning seat 1, the movable tooth block 3 and the conductor 10 which are connected with the positioning ring to synchronously rotate in the same direction, and the coil 9 is not in direct contact with the positioning seat 1, so that the through groove is formed in the positioning seat 1, and the coil 9 is positioned in the through groove, so that the coil 9 is not influenced when the structure rotates. At this time, the conductor 10 cuts the magnetic induction line of the coil 9 and generates a certain amount of induced current, as the electromagnetic device 11 is provided with five parts which respectively correspond to the five movable tooth blocks 3, the electromagnetic device 11 is respectively and electrically connected with the coil 9 and the conductor 10, the electromagnetic device 11 shows magnetism in the electrified state and the magnetic pole is N pole, magnetic force is generated inside the electromagnetic device 11 at this time, but because the rotating speed of the positioning ring 8 and the output part of the centrifugal device is normal at this time, the generated induced current is limited, and the magnetic force generated by the electromagnetic device 11 at this time is not enough to push the movable tooth blocks 3 to move.
When the rotating speed of the output part of the centrifugal device exceeds a rated value, the rotating speed of the positioning ring 8 is synchronously increased at the moment, the speed and the frequency of the conductor 10 for cutting the coil 9 are accelerated, correspondingly more induced current is generated, the induced current in the electromagnetic device 11 is increased at the moment, the magnetic force in the electromagnetic device is synchronously increased, the value for pushing the movable tooth block 3 is reached, and the outer side of the movable tooth block 3 moves and is meshed with the driven fluted disc 46 at the moment.
At this time, the positioning ring 8 drives the movable tooth block 3 to continue rotating, and synchronously drives the driven gear 46 to rotate, the driven gear 46 rotates to drive the connecting rod 45 to swing, and the connecting rod 45 drives the movable contact 44 to slide in the limiting groove 42. When the movable contact 44 is slid to be in contact with the fixed contact 43, since both the fixed contact 43 and the movable contact 44 are electrically connected to the off switch of the driving power source, the circuit of the driving power source is disconnected at this time, and the output portion of the centrifugal device stops rotating. At this time, the position of the link 45 is changed from the initial state, and can be visually observed.
The structure and process are described with reference to FIGS. 1-6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a biological cell centrifuge speed limit subassembly and application thereof, includes positioning seat (1), its characterized in that: an installation cavity (2) is arranged inside the positioning seat (1), a movable tooth block (3) is movably connected inside the installation cavity (2), a speed limiting mechanism (4) is arranged on the outer side of the positioning seat (1), a reset spring (5) is movably connected on the inner side of the movable tooth block (3), a positioning groove (6) is arranged inside the installation cavity (2), a lead (7) is arranged on the outer side of the speed limiting mechanism (4), a positioning ring (8) is fixedly connected on the inner side of the positioning seat (1), a coil (9) is arranged on the outer side of the positioning ring (8), a conductor (10) is movably connected on the front side of the positioning ring (8), and an electromagnetic device (11) is movably connected on the inner side of the movable tooth block (3);
the speed limiting mechanism (4) comprises a limiting frame (41), a limiting groove (42) is arranged in the limiting frame (41), a fixed contact (43) is connected to the inside of the limiting groove (42) in a specified mode, a movable contact (44) is movably connected to the inside of the limiting groove (42), a connecting rod (45) is movably connected to the inside of the movable contact (44), and a driven fluted disc (46) is connected to one end, far away from the movable contact (44), of the connecting rod (45) in a specified mode.
2. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the positioning seat (1) is annular, the number of the installation cavities (2) is five, the specifications of the installation cavities are the same, and the five installation cavities (2) are uniformly distributed by taking the circle center of the positioning seat (1) as a reference; and reinforcing ribs are arranged between the two adjacent mounting cavities (2) and in the positioning seat (1).
3. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the movable tooth block (3) is in a curved surface shape, teeth are arranged on the outer side of the movable tooth block, the movable tooth block is made of a magnetic material, and the magnetic pole is an N pole; the movable tooth blocks (3) are provided with five parts in total and have the same specification, and the five movable tooth blocks (3) respectively correspond to the five mounting cavities (2); the positioning grooves (6) are provided with five groups of groove-shaped structures, each group of groove-shaped structures comprises three uniform distributions, and the five groups of positioning grooves (6) are respectively positioned in the five mounting cavities (2) and are respectively connected with the five movable tooth blocks (3) in a sliding manner.
4. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the coil (9) mainly comprises an enameled wire, the enamel coating coated on the outer side of the enameled wire is required to be free of damage, the coil (9) is a whole complete enameled wire, and the size of the enameled wire is the same all the time.
5. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: a constant amount of current passing and magnetic induction lines are arranged in the coil (9), and the conductor (10) is provided with five conductors which are same in specification and are uniformly distributed; the conductor (10) is perpendicular to the magnetic induction line direction of the coil (9).
6. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the number of the electromagnetic devices (11) is five, the electromagnetic devices correspond to the five movable tooth blocks (3) respectively, the electromagnetic devices (11) are electrically connected with the coil (9) and the conductor (10) respectively, the electromagnetic devices (11) display magnetism in a power-on state, and the magnetic poles are N poles.
7. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the coil (9) is not in direct contact with the positioning seat (1), a through groove is formed in the positioning seat (1), and the coil (9) is located in the through groove; the speed limiting mechanisms (4) are provided with five groups in total and have the same specification, the five groups of speed limiting mechanisms (4) are electrically connected, and the fixed contact (43) and the movable contact (44) in the five groups of speed limiting mechanisms (4) are electrically connected with the closing switch of the driving power supply.
8. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the limiting frame (41) is of a curved surface structure, and the limiting grooves (42) are identical in shape to the limiting frame (41); the two fixed contacts (43) in the same group are arranged at the left end and the right end of the limiting groove (42); the movable contact (44) is in a curved surface shape and is positioned in the limiting groove (42).
9. The speed limiting component of a biological cell centrifuge and the application thereof according to claim 1, characterized in that: the interior of the movable contact (44) is provided with a hollow structure, and the connecting rod (45) is inserted into the interior of the movable contact (44); the driven fluted disc (46) is semicircular, and teeth matched with the movable tooth block (3) are arranged on the outer side of the driven fluted disc; the centre of a circle department of driven fluted disc (46) is provided with the pivot, and the axis and the pivot of connecting rod (45) are vertical distribution to be vertical state between connecting rod (45) and driven fluted disc (46) the horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571537.9A CN111686946A (en) | 2020-06-22 | 2020-06-22 | Biological cell centrifuge speed limiting assembly and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571537.9A CN111686946A (en) | 2020-06-22 | 2020-06-22 | Biological cell centrifuge speed limiting assembly and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111686946A true CN111686946A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010571537.9A Withdrawn CN111686946A (en) | 2020-06-22 | 2020-06-22 | Biological cell centrifuge speed limiting assembly and application thereof |
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| CN (1) | CN111686946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112276175A (en) * | 2020-10-19 | 2021-01-29 | 浙江火萌互娱信息技术有限公司 | Anti-stall device used during hole milling of hybrid heat exchanger |
| CN112573382A (en) * | 2020-12-22 | 2021-03-30 | 李剑 | Hoisting device for effectively realizing stall self-locking in pipeline transportation hoisting process |
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| JPH06206010A (en) * | 1992-12-14 | 1994-07-26 | E I Du Pont De Nemours & Co | Recognition of rotor of centrifugal separation and control system for centrifugal separator |
| CN1878969A (en) * | 2003-09-10 | 2006-12-13 | 新东工业株式会社 | Device and method for damping vibration of rotating shaft system |
| CN102070056A (en) * | 2011-01-31 | 2011-05-25 | 沈阳博林特电梯股份有限公司 | Speed limiter with electromagnet and built-in photoelectric encoder |
| CN201874746U (en) * | 2010-11-12 | 2011-06-22 | 山东安华拓源能源有限公司 | Speed-limiting damped brake system for wind-driven generators |
| CN201947111U (en) * | 2011-01-07 | 2011-08-24 | 巢湖顺枫风力发电科技有限公司 | Centrifugal automatic speed-limiting device for wind driven generator |
| CN203406767U (en) * | 2013-06-06 | 2014-01-22 | 林英楠 | Permanent magnetism speed regulation, brake or load apparatus with adjustable coupling magnetic flux |
| CN204271818U (en) * | 2014-12-28 | 2015-04-15 | 武汉联创恒业科技有限公司 | Automatic speed-limiting motor and crane |
| CN110733952A (en) * | 2019-10-16 | 2020-01-31 | 镇江朝阳机电科技有限公司 | high-reliability elevator speed limiter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06206010A (en) * | 1992-12-14 | 1994-07-26 | E I Du Pont De Nemours & Co | Recognition of rotor of centrifugal separation and control system for centrifugal separator |
| CN1878969A (en) * | 2003-09-10 | 2006-12-13 | 新东工业株式会社 | Device and method for damping vibration of rotating shaft system |
| CN201874746U (en) * | 2010-11-12 | 2011-06-22 | 山东安华拓源能源有限公司 | Speed-limiting damped brake system for wind-driven generators |
| CN201947111U (en) * | 2011-01-07 | 2011-08-24 | 巢湖顺枫风力发电科技有限公司 | Centrifugal automatic speed-limiting device for wind driven generator |
| CN102070056A (en) * | 2011-01-31 | 2011-05-25 | 沈阳博林特电梯股份有限公司 | Speed limiter with electromagnet and built-in photoelectric encoder |
| CN203406767U (en) * | 2013-06-06 | 2014-01-22 | 林英楠 | Permanent magnetism speed regulation, brake or load apparatus with adjustable coupling magnetic flux |
| CN204271818U (en) * | 2014-12-28 | 2015-04-15 | 武汉联创恒业科技有限公司 | Automatic speed-limiting motor and crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112276175A (en) * | 2020-10-19 | 2021-01-29 | 浙江火萌互娱信息技术有限公司 | Anti-stall device used during hole milling of hybrid heat exchanger |
| CN112573382A (en) * | 2020-12-22 | 2021-03-30 | 李剑 | Hoisting device for effectively realizing stall self-locking in pipeline transportation hoisting process |
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Application publication date: 20200922 |
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