CN110976083A - Separation device for lubricating oil and detection pretreatment method - Google Patents
Separation device for lubricating oil and detection pretreatment method Download PDFInfo
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- CN110976083A CN110976083A CN201911416160.3A CN201911416160A CN110976083A CN 110976083 A CN110976083 A CN 110976083A CN 201911416160 A CN201911416160 A CN 201911416160A CN 110976083 A CN110976083 A CN 110976083A
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- lubricating oil
- electromagnets
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- sample bottle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
Abstract
The invention discloses a separation device for lubricating oil and a detection pretreatment method, and relates to the technical field of solid-liquid separation, wherein the separation device for the lubricating oil comprises a base, a clamping mechanism and a plurality of electromagnets, wherein the clamping mechanism comprises a plurality of fastening components, and the fastening components can move towards or away from a central shaft of the base so as to clamp or loosen an oil sample bottle; and the electromagnets are respectively arranged in the base and the at least one fastening component and are electrically connected with the power supply device. This a separator for lubricating oil can be fast with abrasive particles and lubricating oil separation, and the lubricating oil after the separation has good representativeness, is favorable to the accuracy that subsequent lubricating oil's physical and chemical properties detected.
Description
Technical Field
The invention relates to the technical field of solid-liquid separation, in particular to a separation device for lubricating oil and a detection pretreatment method.
Background
The lubricating oil detection is an important basic work for equipment to carry out lubrication management and equipment maintenance, and the lubricating oil detection is to prevent major accidents of equipment by regularly tracking and monitoring physical and chemical performance indexes, wear metals, pollution impurity particles and the like of the lubricating oil in use of the equipment. Before the used lubricating oil is tested for physical and chemical properties, the used lubricating oil is taken out of the using equipment, filled into an oil sample bottle and finally sent to a laboratory for testing. Because the lubricating oil has certain viscosity and the operation conditions of the used equipment are different, the lubricating oil contains insoluble abrasive particles, so that the texture of the lubricating oil is not uniform enough. In order to ensure the representativeness and the accuracy of an oil sample, inspectors need to pretreat the oil sample, but the first technical problem is that after homogenization treatment, abrasive particles in the oil sample are dispersed in oil, and inevitably contained in the oil sample during sampling, so that the quality of the oil sample is larger, and the result of physicochemical testing is smaller; secondly, because the lubricating oil has high viscosity, abrasive particles are precipitated by adopting a uniform standing mode, the required precipitation time is long, and the long-time standing can damage the uniformity of a liquid phase, thereby influencing the detection result. Therefore, there is an urgent need for a device capable of rapidly performing solid-liquid separation on used lubricating oil and abrasive particles to fill the gap in the market.
Disclosure of Invention
The invention aims to provide a separating device for lubricating oil, which solves the technical problems of inaccurate detection result of physical and chemical properties of the lubricating oil and overlong separating time caused by abrasive particles in the lubricating oil.
Another objective of the present invention is to provide a pretreatment method for detecting separation of lubricating oil, which solves the technical problems of inaccurate detection result of physicochemical properties of lubricating oil and too long separation time due to the presence of abrasive particles in the lubricating oil, and provides a more standard and accurate pretreatment method for detection.
In order to achieve the two purposes, the invention adopts the following technical scheme:
a separation device for lubricating oil comprises a base, a clamping mechanism and a plurality of electromagnets, wherein the clamping mechanism comprises a plurality of fastening components which can move towards or away from a central shaft of the base so as to clamp or unclamp an oil sample bottle; and the electromagnets are respectively arranged in the base and the at least one fastening component, and are electrically connected with the power supply device to adsorb abrasive particles.
Optionally, fixture still includes the rocking bar piece, the rocking bar piece is equipped with two sections external screw threads opposite in direction, two sections the external screw thread respectively with two fastening component's internal thread cooperation, wherein, when the drive the rocking bar piece rotates, two fastening component can be relative or opposite removal.
Optionally, the fastening assembly comprises a fastener and a sliding block, wherein the inner side wall of the fastener can be contacted with the outer side wall of the oil sample bottle; and the sliding block is connected on the outer side wall of the fastener, the sliding block is provided with a clamping protrusion matched with the clamping groove of the base, and the rocking bar piece is rotatably arranged on the clamping protrusion in a penetrating manner so as to drive the sliding block to slide along the length direction of the clamping groove.
Optionally, the clamping mechanism further comprises a pressing plate, the pressing plate is of a Z-shaped structure, the pressing plate is connected with the base, two ends of the sliding block are respectively provided with a protrusion, and one end of each pressing plate is arranged above one protrusion.
Optionally, the electromagnet is arranged on the base and located between the two fastening components.
Optionally, a plurality of the electromagnets are arranged in two rows, two rows of the electromagnets being arranged on one of the fasteners.
Optionally, the separation device for lubricating oil further comprises a switch button, and the switch button is respectively connected with the electromagnet and the power supply device.
Compared with the prior art, the separation device has the advantages that: place the oil appearance bottle on the base, two fastening components press from both sides tight oil appearance bottle, because abrasive particles's main component is iron fillings, when the electro-magnet on power supply unit intercommunication fastening components or the electro-magnet on the base, abrasive particles can move until adsorbing on the bottle wall of oil appearance bottle towards the direction of fastening components or base, until subsiding the bottom of oil appearance bottle. The separating device can rapidly separate the abrasive particles from the lubricating oil, and the separated lubricating oil has good representativeness and is beneficial to the accuracy of the subsequent physical and chemical property detection of the lubricating oil.
A detection pretreatment method for separation of lubricating oil, comprising the steps of:
s1, taking out used lubricating oil from the using equipment and filling the lubricating oil into an oil sample bottle;
s2, placing the oil sample bottle on a vibration shaker, and vibrating the lubricating oil until the lubricating oil is in an oil uniform state;
s3, placing the vibrated oil sample bottle on the separation device for the lubricating oil to perform solid-liquid separation until the abrasive particles are precipitated to the bottom of the oil sample bottle;
and S4, taking out the lubricating oil from the middle part of the oil sample bottle after solid-liquid separation, and finishing the pretreatment before the physical and chemical performance detection of the lubricating oil.
Optionally, in the pretreatment method for detecting separation of lubricating oil, the step S3 specifically includes the following steps:
s31, placing the vibrated oil sample bottle on the base, and driving a rocker of the clamping mechanism to rotate so that a fastening component of the clamping mechanism moves towards the central axis of the base to clamp the oil sample bottle;
s32, pressing a switch button of the lubricating oil separating device to enable the power supply device to be communicated with the two rows of electromagnets on the fastening piece of one of the fastening assemblies, and electrifying the two rows of electromagnets for a first preset time;
s33, stopping electrifying the electromagnets at the upper row, and continuously electrifying the electromagnets at the lower row for a second preset time;
and S34, stopping electrifying the electromagnets positioned at the lower row, communicating the power supply device with the electromagnets on the base, and electrifying the electromagnets on the base for a third period of preset time until all the abrasive particles are settled at the bottom of the oil sample bottle.
Optionally, in the step S2, the oscillation frequency is 0 to 500rpm, and the oscillation time is 0 to 120 min; and/or in the step S3, the solid-liquid separation time is 0-30 min.
The detection pretreatment method for the separation of the lubricating oil has the advantages that: the method can obtain the lubricating oil sample with uniform components and no abrasive particles, the lubricating oil sample has good representativeness, and the blank of the lubricating oil detection pretreatment method in the current market is filled.
Drawings
FIG. 1 is a schematic diagram of a separation device for lubricating oil according to an embodiment of the present invention;
FIG. 2 is an exploded view of a separator for lubricating oil according to an embodiment of the present invention;
FIG. 3 is a flow chart of steps of a detection pre-treatment method for lube separation provided by an embodiment of the present invention;
fig. 4 is a flowchart of the detailed steps in step S3 of the detection pretreatment method for lubricating oil separation provided by the embodied trial method of the present invention.
Reference numerals:
the device comprises a base-1, a clamping groove-11, a fastening component-21, a fastening piece-211, a sliding block-212, a clamping protrusion-2121, a protrusion-2122, a rocker piece-22, an external thread-221, a pressure plate-23, a switch button-3 and a power supply device-4.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 and 2, a separation device for lubricating oil comprises a base 1, a clamping mechanism and a plurality of electromagnets, wherein the clamping mechanism comprises a plurality of fastening components 21, and the plurality of fastening components 21 can move towards or away from the central axis of the base 1 to clamp or unclamp an oil sample bottle; and a plurality of electromagnets are respectively arranged in the base 1 and the at least one fastening component 21, and the plurality of electromagnets are electrically connected with the power supply device 4 to adsorb the abrasive particles.
It can be understood that, the oil sample bottle is placed on the base 1, the two fastening components 21 move relatively until the oil sample bottle is clamped, so that the oil sample bottle is fixed between the two fastening components 21, because the main component of the abrasive particles is iron filings with ferromagnetism, when the power supply device 4 is communicated with the electromagnet on the fastening component 21 or the electromagnet on the base 1, the abrasive particles with ferromagnetism can move towards the direction of the fastening components 21 or the base 1 until the abrasive particles are adsorbed on the bottle wall of the oil sample bottle and finally settle to the bottom of the oil sample bottle, and the specific settling process refers to the specific step in the step S3 of the detection pretreatment method for lubricating oil separation, wherein the settling process utilizes the characteristics that the electromagnet is electrified to generate magnetism and is not electrified to demagnetized. The separation device for the lubricating oil can quickly separate the abrasive particles from the lubricating oil, and the separated lubricating oil has good representativeness and is beneficial to the accuracy of the subsequent detection of the physical and chemical properties of the lubricating oil.
In addition, in other embodiments of the present invention, some of the fastening assemblies 21 of the plurality of fastening assemblies 21 may be selected as fixed members, and the other fastening assemblies 21 may be selected as movable members, and the movable members move toward or away from the central axis of the base 1 to clamp or release the oil sample bottles.
Optionally, as shown in fig. 1 and 2, the clamping mechanism further comprises a rocker member 22, the rocker member 22 is provided with two sections of external threads 221 with opposite directions, the two sections of external threads 221 are respectively matched with the internal threads of the two fastening assemblies 21, wherein when the rocker member 22 is driven to rotate, the two fastening assemblies 21 can move relatively or oppositely.
It should be noted that, because the two sections of external threads 221 on the rocker 22 in opposite directions are respectively matched with the internal threads of the two fastening assemblies 21, when the rocker 22 is driven to rotate clockwise, the two fastening assemblies 21 can move relatively until the oil sample bottle is clamped, so that the oil sample bottle is fixed on the base 1, which is convenient for subsequently separating the abrasive particles from the lubricating oil, and when the rocker 22 is driven to rotate counterclockwise, the two fastening assemblies 21 can move oppositely to loosen the oil sample bottle, which is convenient for taking out the oil sample bottle from the base 1. It should be noted that the rotation of the rocker 22 in the clockwise direction or the counterclockwise direction is not limited, and in other embodiments of the present invention, when the rocker 22 rotates in the clockwise direction, the two fastening assemblies 21 can move oppositely to release the oil sample bottle; when the rocker member 22 is rotated in a counterclockwise direction, the two fastening assemblies 21 can move relative to each other until the vial is clamped.
Alternatively, as shown in fig. 2, the fastening assembly 21 includes a fastening member 211 and a sliding block 212, and an inner sidewall of the fastening member 211 can contact with an outer sidewall of the oil sample bottle; the sliding block 212 is connected to the outer side wall of the fastening member 211, the sliding block 212 is provided with a protruding block 2121 matched with the slot 11 of the base 1, and the rocking bar 22 is rotatably arranged on the protruding block 2121 in a penetrating manner to drive the sliding block 212 to slide along the length direction of the slot 11.
It can be understood that, because the sliding blocks 212 are provided with the blocking protrusions 2121 which are matched with the blocking slots 11 of the base 1, when the rocker member 22 is driven to rotate, the two sliding blocks 212 can slide relatively along the length direction of the blocking slots 11, that is, the blocking protrusions 2121 can slide in the blocking slots 11, so that the two fasteners 211 can stop against the oil sample bottle to fix the oil sample bottle. In addition, the slot 11 has a limiting function, and the sliding block 212 is guaranteed to slide along the length direction of the slot 11 and does not deviate from the direction. In addition, the connection between the sliding block 212 and the base 1 is not limited to the engagement between the card slot 11 and the card protrusion 2121, and in other embodiments of the present invention, other movable connection manners may be selected according to actual needs.
Optionally, as shown in fig. 2, the clamping mechanism further includes a pressing plate 23, the pressing plate 23 is of a Z-shaped structure, the pressing plate 23 is connected to the base 1, two ends of the sliding block 212 are respectively provided with a protrusion 2122, and one end of each pressing plate 23 is disposed above one protrusion 2122.
It can be understood that, when the rocker 22 rotates to drive the sliding block 212 to slide along the length direction of the slot 11, since one end of each pressing plate 23 is disposed above the protrusion 2122 of the sliding block 212, the sliding block 212 can be prevented from falling out from the top of the base 1, and the stability of the sliding block 212 in the sliding process is ensured to a certain extent.
Alternatively, the plurality of electromagnets are arranged in two rows, with two rows of electromagnets arranged on one of the fasteners 211. It should be noted that when the electromagnet disposed on one of the fasteners 211 is connected to the power supply device 4, magnetism is generated, and at this time, the abrasive particles in the oil sample bottle move toward the direction of the fastener 211 until being adsorbed onto the sidewall of the oil sample bottle, so that the abrasive particles are convenient to subsequently settle to the bottom of the oil sample bottle. Of course, in other embodiments of the present invention, two rows of electromagnets may be disposed on each of the two fastening members 211, and the operation principle is the same as that described above. In addition, because two rows of electromagnets are arranged on the fastening piece 211, the adsorption effect is better. Of course, in other embodiments of the present invention, the number of the rows of the electromagnets is not limited to two, and may be selected according to actual needs.
Optionally, an electromagnet is arranged on the base 1 between the two fastening assemblies 21.
It should be noted that when the electromagnet arranged on the base 1 is connected to the power supply device 4, magnetism is generated, and at this time, the abrasive particles in the oil sample bottle can move towards the base 1 until being adsorbed on the bottom wall of the oil sample bottle, so that solid-liquid separation of the lubricating oil and the abrasive particles is facilitated. Generally, the number of the electromagnets disposed on the base 1 is only one, and of course, in some embodiments of the present invention, other numbers of the electromagnets disposed on the base 1 may be selected.
Alternatively, as shown in fig. 2, the separating device for lubricating oil further comprises a switch button 3, and the switch button 3 is connected with the electromagnet and the power supply device 4, respectively. The switch button 3 can control whether the electromagnet is communicated with the power supply device 4 or not, and further control the electromagnet to be magnetized or demagnetized.
A detection pre-treatment method for lubricating oil separation, as shown in fig. 3, comprising the steps of:
s1, taking out used lubricating oil from the using equipment and filling the lubricating oil into an oil sample bottle;
s2, placing the oil sample bottle on a vibration shaker, and vibrating the lubricating oil until the lubricating oil is in an oil uniform state;
s3, placing the vibrated oil sample bottle on a separation device for lubricating oil to perform solid-liquid separation until the abrasive particles are precipitated to the bottom of the oil sample bottle;
and S4, taking out the lubricating oil from the middle part of the oil sample bottle after solid-liquid separation, and finishing the pretreatment before the detection of the physical and chemical properties of the lubricating oil.
The detection pretreatment method for separating the lubricating oil can obtain the lubricating oil sample with uniform components and no abrasive particles, has good representativeness, is convenient for the subsequent detection of the physical and chemical properties of the lubricating oil, and fills the blank of the detection pretreatment method for the lubricating oil in the current market.
In step S4, the lubricating oil was taken out from the middle part of the oil sample bottle after the solid-liquid separation, and the lubricating oil in the middle part was uniform in texture and more representative. The upper portion of the lubricating oil is in direct contact with the air, moisture or impurities in the air can affect the sampling of the lubricating oil, and the lower portion of the lubricating oil contains abrasive particles, which is not beneficial to sampling. The physical and chemical property detection of the lubricating oil after the step of S4 comprises the detection of the oil-water content of the lubricating oil, the detection of the total acid value, the detection of the oxidation degree and the like.
Optionally, as shown in fig. 4, the step S3 includes the following steps:
s31, placing the vibrated oil sample bottle on the base 1, and driving the rocker 22 to rotate so that the two fastening assemblies 21 move relatively to clamp the oil sample bottle;
s32, pressing the switch button 3 to enable the power supply device 4 to be communicated with two rows of electromagnets on one fastener 211, and electrifying the two rows of electromagnets for a first preset time;
s33, stopping electrifying the electromagnets at the upper row, and continuously electrifying the electromagnets at the lower row for a second preset time;
and S34, stopping electrifying the electromagnets at the lower row, communicating the power supply device 4 with the electromagnets on the base 1, and electrifying the electromagnets on the base 1 for a third period of preset time until all the abrasive particles are settled at the bottom of the oil sample bottle.
It should be noted that, two rows of electromagnets on the fastening piece 211 are powered on first, because the main component of the abrasive particles is iron filings with ferromagnetism, the abrasive particles will move towards the fastening piece 211 until being adsorbed on the side wall of the oil sample bottle, then the energization of the electromagnets on the upper row is stopped, the electromagnets on the lower row continue to be powered on, so that the abrasive particles move from the top to the bottom of the side wall along the side wall of the oil sample bottle, at this time, the electromagnets on the lower row are stopped to be powered on, the electromagnets on the base 1 are powered on, and the abrasive particles on the lower part of the side wall move towards the base 1 until sinking to the bottom of. The method makes full use of the characteristics of electromagnet that the electromagnet generates magnetism when being electrified and demagnetizes when being powered off, and can quickly and effectively separate the lubricating oil from the abrasive particles.
In addition, the first preset time, the second preset time and the third preset time are all 0-10min, and certainly, in other embodiments of the invention, the energization time length can be selected according to actual conditions.
Optionally, in step S2, the oscillation frequency is 0-500rpm, the oscillation time is 0-120min, and the oscillation effect is good. In the step S3, the solid-liquid separation time is 0-30min, and the solid-liquid separation effect is good.
In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Further, it is to be understood that the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "mounted," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. Those skilled in the art can understand the above specific meanings included in the present invention according to specific situations.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A separator for lubricating oil comprising:
a base (1);
a clamping mechanism comprising a plurality of fastening components (21), the plurality of fastening components (21) being movable towards or away from a central axis of the base (1) to clamp or unclamp the vial; and
the abrasive particle adsorption device comprises a plurality of electromagnets, the electromagnets are arranged in the base (1) and the fastening assembly (21) respectively, and the electromagnets are electrically connected with a power supply device (4) to adsorb abrasive particles.
2. The separator for lubricating oil according to claim 1, wherein the clamping mechanism further comprises:
the rocker member (22), rocker member (22) is equipped with two sections external screw threads (221) of opposite direction, two sections external screw thread (221) respectively with two the internal thread fit of fastening component (21), wherein, when the drive rocker member (22) rotates, two fastening component (21) can be relative or opposite movement.
3. The separation device for lubricating oil according to claim 2, characterized in that the fastening assembly (21) comprises:
a fastener (211), an inner side wall of the fastener (211) being capable of contacting an outer side wall of the oil sample bottle; and
sliding block (212), sliding block (212) are connected on the lateral wall of fastener (211), be equipped with on sliding block (212) with draw-in groove (11) complex card of base (1) is protruding (2121), rocking bar spare (22) rotationally wear to establish in order to drive on the card is protruding (2121) sliding block (212) are followed the length direction of draw-in groove (11) slides.
4. A separator for lubricant according to claim 3, wherein said clamping mechanism further comprises a pressing plate (23), said pressing plate (23) is Z-shaped, said pressing plate (23) is connected to said base (1), two ends of said sliding block (212) are respectively provided with a protrusion (2122), and one end of each pressing plate (23) is disposed above one of said protrusions (2122).
5. -separator device for lubricating oil according to claim 1, characterised in that the electromagnet is arranged on the base (1) between two of the fastening assemblies (21).
6. A separator device for lubricating oil as claimed in claim 3, characterized in that a plurality of the electromagnets is arranged in two rows, two rows of the electromagnets being arranged on one of the fastening members (211).
7. The separation device for lubricating oil according to claim 2, characterized in that it further comprises a switch button (3), said switch button (3) being connected to said electromagnet and to said power supply means (4), respectively.
8. A detection pre-treatment method for lubricating oil separation, characterized in that it comprises the steps of:
s1, taking out used lubricating oil from the using equipment and filling the lubricating oil into an oil sample bottle;
s2, placing the oil sample bottle on a vibration shaker, and vibrating the lubricating oil until the lubricating oil is in an oil uniform state;
s3, placing the vibrated oil sample bottle on a separation device for lubricating oil according to any one of claims 1 to 7 for solid-liquid separation until the abrasive particles are precipitated to the bottom of the oil sample bottle;
and S4, taking out the lubricating oil from the middle part of the oil sample bottle after solid-liquid separation, and finishing the pretreatment before the physical and chemical performance detection of the lubricating oil.
9. The pre-treatment method for detection of lubrication oil separation according to claim 8, wherein said step S3 includes the steps of:
s31, placing the vibrated oil sample bottle on the base (1), and driving a rocker member (22) of the clamping mechanism to rotate so that a fastening assembly (21) of the clamping mechanism moves towards the central axis of the base (1) to clamp the oil sample bottle;
s32, pressing a switch button (3) of the separation device for lubricating oil to enable the power supply device (4) to be communicated with two rows of electromagnets on a fastening piece (211) of one fastening assembly (21), wherein the two rows of electromagnets are electrified for a first preset time;
s33, stopping electrifying the electromagnets at the upper row, and continuously electrifying the electromagnets at the lower row for a second preset time;
and S34, stopping electrifying the electromagnets at the lower row, communicating the power supply device (4) with the electromagnets on the base (1), and electrifying the electromagnets on the base (1) for a third section of preset time until all the abrasive particles are settled at the bottom of the oil sample bottle.
10. The pretreatment method for detecting separation of lubricating oil according to claim 8, wherein in the step S2, the oscillation frequency is 0-550rpm, and the oscillation time is 0-120 min; and/or in the step S3, the solid-liquid separation time is 0-30 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111905925A (en) * | 2020-06-30 | 2020-11-10 | 孙钟 | Multistage screening sorting device of building rubbish |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111905925A (en) * | 2020-06-30 | 2020-11-10 | 孙钟 | Multistage screening sorting device of building rubbish |
| CN111905925B (en) * | 2020-06-30 | 2022-08-23 | 兰陵县冠东环保科技有限公司 | Multistage screening sorting device of building rubbish |
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Effective date of registration: 20200507 Address after: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Applicant after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Address before: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Applicant before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Applicant before: Nanjing High Precision Transmission Equipment Manufacturing Group Co., Ltd. |