CN107490498B - Micro-sintered neodymium-iron-boron magnetic powder hypoxia sampling device and sampling method thereof - Google Patents
Micro-sintered neodymium-iron-boron magnetic powder hypoxia sampling device and sampling method thereof Download PDFInfo
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- CN107490498B CN107490498B CN201710641787.3A CN201710641787A CN107490498B CN 107490498 B CN107490498 B CN 107490498B CN 201710641787 A CN201710641787 A CN 201710641787A CN 107490498 B CN107490498 B CN 107490498B
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- 238000005070 sampling Methods 0.000 title claims abstract description 74
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 35
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 206010021143 Hypoxia Diseases 0.000 title claims description 10
- 230000007954 hypoxia Effects 0.000 title claims description 10
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 56
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 44
- 239000001301 oxygen Substances 0.000 claims abstract description 35
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 35
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 34
- 239000010935 stainless steel Substances 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 28
- 238000012360 testing method Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000004663 powder metallurgy Methods 0.000 abstract description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A micro sintered NdFeB magnetic powder low-oxygen sampling device and a sampling method thereof belong to the technical field of powder metallurgy and comprise a material taking device and a sample container; the material taking device is arranged in a hollow way to form a containing cavity; the material taking device is connected with a nitrogen charging pipe and a nitrogen discharging pipe; the nitrogen charging pipe and the nitrogen discharging pipe are communicated with each other through the accommodating cavity; the material taking device is provided with a side opening; the side opening is provided with a sleeve; the inner wall of the material taking device is provided with a stainless steel telescopic pipe; the sample container is fixedly arranged at the bottom end of the stainless steel telescopic pipe. According to the technical scheme, quantitative control of the oxygen content in the sampling environment and accurate positioning of the sampling position are realized, material waste is reduced, the working flow is simplified, the sampling speed is fast, manpower and material resources are saved, and the working efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a micro-sintered neodymium iron boron magnetic powder hypoxia sampling device and a sampling method thereof.
Background
The sintered NdFeB magnet is a novel permanent magnet material developed after 1983, has extremely high magnetic property and is widely applied to the fields of various permanent magnet motors, engineering machinery, electroacoustic, electrical appliances, medical appliances and the like. The sintered NdFeB magnet is manufactured by a powder metallurgy process, the oxygen content of a semi-finished product in a powder form stage must be strictly controlled, and the stability and consistency of the product are improved.
The magnetic powder oxygen content sampling method in the current industry molding process generally comprises the following steps: a plastic bag with an opening is used, high-purity nitrogen is introduced, after the nitrogen is filled and discharged twice, a rubber band is used for binding the bag opening and sleeved into an inverted powder barrel, the powder barrel is opened and closed by a valve, the weight of powder falling is manually controlled, after the weight requirement of a sample is met, the rubber band is used for binding the bag opening, and after the sampling is finished, the oxygen content of magnetic powder is measured. The method samples the following defects: 1. the plastic bag has insufficient oxygen discharge, and has great artificial influence factor, and the original powder is deteriorated due to easy oxidation and even fire burning of the powder when meeting oxygen, so that the oxygen content test is not meaningful. 2. The sampling position can not be positioned at will, and the magnetic powder sampling is not representative. 3. The powder sampling weight is manually controlled by opening and closing a valve, and the excessive sampling amount generally causes waste. 4. Use fork truck or crane to make the powder bucket invert and need 2~3 people cooperation sample and, the flow is loaded down with trivial details, and manpower and materials consume great, and sampling efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings and provide a micro-sintered neodymium iron boron magnetic powder hypoxia sampling device.
The invention further aims to provide a low-oxygen sampling method for the micro-sintered neodymium iron boron magnetic powder.
The technical scheme adopted by the invention for achieving the purpose is as follows.
A micro sintered NdFeB magnetic powder hypoxia sampling device comprises a material taking device and a sample container; the material taking device is arranged in a hollow way to form a containing cavity; the material taking device is connected with a nitrogen charging pipe and a nitrogen discharging pipe; the nitrogen charging pipe and the nitrogen discharging pipe are communicated with each other through the accommodating cavity; the material taking device is provided with a side opening; the side opening is provided with a sleeve; the inner wall of the material taking device is provided with a stainless steel telescopic pipe; the sample container is fixedly arranged at the bottom end of the stainless steel telescopic pipe.
An interface is arranged at the bottom of the material taking device; the interface is provided with a clamp.
The nitrogen charging pipe is connected with the nitrogen charging device and is provided with a nitrogen valve; and an oxygen content analyzer is arranged on the inner wall of the material taking device.
The sample container comprises a main body, an outer sealing sleeve, a sampling hole and a conical head; the main body is fixedly arranged at the bottom end of the stainless steel telescopic pipe and is cylindrical; the outer sealing sleeve is sleeved on the outer wall of the main body and is in sliding connection with the main body; the side wall of the main body is provided with a sampling hole; the height of the sampling hole is smaller than that of the outer sealing sleeve; when the outer sealing sleeve slides downwards, the outer sealing sleeve covers the sampling hole; the cone head is conical with wide upper part and narrow lower part, and the top part of the cone head is fixedly arranged at the bottom of the main body.
A micro sintered NdFeB magnetic powder hypoxia sampling method comprises the following steps:
step (1): connect the sample holder and the stainless steel extension tube:
the stainless steel telescopic tube is slightly lengthened, and the sample container is fixedly connected with the tail end of the stainless steel telescopic tube.
Step (2): opening the outer cover of the powder barrel, and butting the material taking device and the powder barrel:
taking down the outer cover of the powder barrel, exposing the barrel opening, and taking down the sealing ring placed at the edge of the barrel opening, wherein the interface of the material taking device is abutted with the powder barrel opening so as to be tightly attached to the powder barrel opening, and the interface is clamped by a clamp.
Step (3): and (3) filling nitrogen and discharging oxygen:
the arm stretches into the sleeve from the side bag opening of the material taking device, the nitrogen valve is opened to charge nitrogen and discharge oxygen for about 30 seconds, and the oxygen content analyzer displays that the oxygen content value is lower than 50PPM.
Step (4): sampling:
opening a valve of the magnetic powder barrel, pulling an outer sealing sleeve of the sample container open to expose the sampling hole, stretching the stainless steel telescopic pipe deep into the magnetic powder barrel, and rotating the stainless steel telescopic pipe after reaching a required sampling position to enable magnetic powder to enter the sampling hole.
Step (5): closing the powder barrel:
the arm stretches into the sleeve, the stainless steel telescopic tube is shortened to enable the sample container to be located in the containing cavity of the material taking device, the outer sealing sleeve is slid downwards, the outer sealing sleeve covers the sampling hole, and therefore the sampling hole is closed; closing a valve of the magnetic powder barrel, taking down the material taking device, taking away the sample container to test the oxygen content of the magnetic powder, and completing the sampling.
According to the technical scheme, quantitative control of the oxygen content in the sampling environment and accurate positioning of the sampling position are realized, material waste is reduced, the working flow is simplified, the sampling speed is fast, manpower and material resources are saved, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of the clip;
in the figure: the device comprises a material taking device 100, a nitrogen charging pipe 101, a nitrogen discharging pipe 102, an interface 103, a clamp 104, sleeves 105, a stainless steel telescopic pipe 106, a sample container 200, a main body 201, an outer sealing sleeve 202, a sampling hole 203 and a conical head 204.
Description of the embodiments
The present invention will be described in further detail with reference to the accompanying drawings.
A micro-sintered neodymium iron boron magnetic powder low-oxygen sampling device comprises a material taking device 100 and a sample container 200.
The material taking device 100 is arranged in a hollow manner to form a containing cavity; the material taking device 100 is connected with a nitrogen charging pipe 101 and a nitrogen discharging pipe 102; the nitrogen charging pipe 101 and the nitrogen discharging pipe 102 are communicated with each other through the accommodating cavity; an interface 103 is arranged at the bottom of the material taking device 100; the interface 103 is provided with a clamp 104; the material taking device 100 is provided with a side opening; the side port is provided with a sleeve 105; the inner wall of the material taking device 100 is provided with a stainless steel telescopic pipe 106.
Preferably, the stainless steel telescopic tube 106 is provided with a perforation at the top end. One end of the rope is fixedly arranged on the inner wall of the material taking device 100, and the other end of the rope penetrates through a perforation at the top end of the stainless steel telescopic pipe 106 and is knotted and fixed, so that the stainless steel telescopic pipe 106 is arranged on the inner wall of the material taking device 100, and the stainless steel telescopic pipe 106 can rotate within a certain angle range. The nitrogen charging pipe 101 is connected with a nitrogen charging device, and the nitrogen charging pipe 101 is provided with a nitrogen valve. The nitrogen valve is opened, and nitrogen and oxygen are filled into the accommodating cavity of the material taking device 100 through the nitrogen filling pipe 101. An oxygen content analyzer is installed on the inner wall of the material taking device 100. The oxygen content analyzer is used to analyze the oxygen content of the reclaimer 100.
The sleeve 105 is a waterproof, airtight cloth or latex material. The operator extends his or her hand into the sleeve 105 to manipulate the length of the stainless steel bellows 106 and the depth of the sample holder 200.
The whole frame of the material taking device 100 is made of a fireproof transparent acrylic material and a 304 stainless steel material, and oxygen can be rapidly discharged to 0ppm within 30 seconds.
The sample holder 200 comprises a main body 201, an outer sealing sleeve 202, a sampling hole 203 and a conical head 204.
The main body 201 is fixedly arranged at the bottom end of the stainless steel telescopic pipe 106, and the main body 201 is cylindrical; the outer sealing sleeve 202 is sleeved on the outer wall of the main body 201, and the outer sealing sleeve 202 is in sliding connection with the main body 201; the side wall of the main body 201 is provided with a sampling hole 203; the height of the sampling hole 203 is smaller than that of the outer sealing sleeve 202; when the outer gland 202 slides down, the outer gland 202 covers the sampling hole 203; the conical head 204 is conical with a wide upper part and a narrow lower part, and the top of the conical head 204 is fixedly arranged at the bottom of the main body 201.
The main body of the sample holder 200 is made of PVC material, and the conical head 204 is made of 304 stainless steel, so that the gravity center of the sample holder 200 is lower, the weight of the sample holder 200 is moderate, and the sampling hole 203 can be immersed into magnetic powder. The diameter of the sampling hole 203 is 5-20 mm.
As shown in fig. 2, the clip 104 is circular and has an opening, and a bolt is provided at the opening. In fig. 2, the mouth of the powder bucket, the connector 103 and the clamp 104 are arranged in sequence from inside to outside. The clamp 104 is sleeved outside the connector 103, and the inner wall of the clamp 104 is attached to the outer wall of the connector 103.
A micro sintered NdFeB magnetic powder hypoxia sampling method comprises the following steps:
step (1): connect the sample holder 200 and the stainless steel bellows 106:
the stainless steel telescopic tube 106 is slightly elongated, and the sample holder 200 is fixedly connected with the tail end of the stainless steel telescopic tube 106.
Step (2): opening the outer cover of the powder barrel, and butting the material taking device 100 with the powder barrel:
taking down the outer cover of the powder barrel, exposing the barrel opening, taking down the sealing ring placed at the edge of the barrel opening, abutting the interface 103 of the material taking device 100 with the powder barrel opening to enable the interface 103 and the powder barrel opening to be tightly attached, and clamping the interface by using a clamp 104.
Step (3): and (3) filling nitrogen and discharging oxygen:
the arm was extended into the sleeve 105 from the side pocket of the reclaimer 100, and the nitrogen valve was opened to fill nitrogen and remove oxygen for about 30 seconds, so that the oxygen content analyzer showed an oxygen content value below 50PPM.
Step (4): sampling:
opening a valve of the magnetic powder barrel, pulling the outer sealing sleeve 202 of the sample container 200 open to expose the sampling hole 203, stretching the stainless steel telescopic pipe 106 deep into the magnetic powder barrel, and rotating the stainless steel telescopic pipe 106 after reaching the required sampling position to enable magnetic powder to enter the sampling hole 203.
Step (5): closing the powder barrel:
the arm stretches into the sleeve 105, the stainless steel telescopic tube 106 is shortened, the sample container 200 is positioned in the accommodating cavity of the material taking device 100, the outer sealing sleeve 202 is slid downwards, the outer sealing sleeve 202 covers the sampling hole 203, and therefore the sampling hole 203 is closed; closing the valve of the magnetic powder barrel, taking down the material taking device 100, taking away the sample container 200 for testing the oxygen content of the magnetic powder, and completing the sampling.
According to the technical scheme, when sampling is carried out, nitrogen is filled to carry out powder anti-oxidation protection, the problems that neodymium iron boron magnetic powder sampling is easy to oxidize and sampling efficiency is low are solved, and the device has the advantages of being rapid in oxygen discharge, not easy to oxidize magnetic powder, capable of randomly positioning a sampling position, small in material waste and high in sampling efficiency.
The invention has been described in terms of embodiments, and the device can be modified and improved without departing from the principles of the invention. It should be noted that all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (3)
1. A micro sintered NdFeB magnetic powder hypoxia sampling method is characterized by comprising the following steps:
step (1): connect the sample holder (200) and the stainless steel telescopic tube (106):
slightly elongating the stainless steel telescopic tube (106), and fixedly connecting the sample container (200) with the tail end of the stainless steel telescopic tube (106);
step (2): opening the outer cover of the powder barrel, and butting the material taking device (100) and the powder barrel:
taking down the outer cover of the powder barrel to expose the barrel opening, abutting the interface (103) of the material taking device (100) with the powder barrel opening to enable the powder barrel opening and the interface to be tightly attached without taking down a sealing ring placed at the edge of the barrel opening, and clamping the interface by using a clamp (104);
step (3): and (3) filling nitrogen and discharging oxygen:
extending an arm into the sleeve (105) from a side pocket of the material taking device (100), and opening a nitrogen valve to charge nitrogen and discharge oxygen for about 30 seconds, so that the oxygen content analyzer displays an oxygen content value lower than 50PPM;
step (4): sampling:
opening a magnetic powder barrel valve, pulling an outer sealing sleeve (202) of the sample container (200) open to expose a sampling hole (203), stretching the stainless steel telescopic pipe (106) deep into the magnetic powder barrel, and rotating the stainless steel telescopic pipe (106) after reaching a required sampling position to enable magnetic powder to enter the sampling hole (203);
step (5): closing the powder barrel:
the arm stretches into the sleeve (105), the stainless steel telescopic tube (106) is shortened, the sample container (200) is positioned in the accommodating cavity of the material taking device (100), the outer sealing sleeve (202) is slid downwards, the outer sealing sleeve (202) covers the sampling hole (203), and therefore the sampling hole (203) is closed; closing a valve of the magnetic powder barrel, taking down the material taking device (100), taking away the sample container (200) to test the oxygen content of the magnetic powder, and completing sampling;
the sampling method is based on a micro sintered NdFeB magnetic powder hypoxia sampling device, and the sampling device comprises a material taking device (100) and a sample container (200); the material taking device (100) is arranged in a hollow manner to form a containing cavity; the material taking device (100) is connected with a nitrogen charging pipe (101) and a nitrogen discharging pipe (102); the nitrogen charging pipe (101) and the nitrogen discharging pipe (102) are both communicated with the accommodating cavity; the material taking device (100) is provided with a side opening; the side opening is provided with a sleeve (105); the inner wall of the material taking device (100) is provided with a stainless steel telescopic pipe (106); the sample container (200) is fixedly arranged at the bottom end of the stainless steel telescopic pipe (106), and the sample container (200) comprises a main body (201), an outer sealing sleeve (202), a sampling hole (203) and a conical head (204); the main body (201) is fixedly arranged at the bottom end of the stainless steel telescopic pipe (106), and the main body (201) is cylindrical; the outer sealing sleeve (202) is sleeved on the outer wall of the main body (201), and the outer sealing sleeve (202) is in sliding connection with the main body (201); a sampling hole (203) is formed in the side wall of the main body (201); the height of the sampling hole (203) is smaller than that of the outer sealing sleeve (202); when the outer sealing sleeve (202) slides downwards, the outer sealing sleeve (202) covers the sampling hole (203); the conical head (204) is conical, the upper part of the conical head is wide, the lower part of the conical head is narrow, and the top of the conical head (204) is fixedly arranged at the bottom of the main body (201).
2. The method for sampling low oxygen of fine sintered neodymium iron boron magnetic powder according to claim 1, wherein an interface (103) is arranged at the bottom of the material taking device (100); the interface (103) is provided with a clamp (104).
3. The method for sampling micro sintered neodymium iron boron magnetic powder hypoxia according to claim 1, wherein the nitrogen charging pipe (101) is connected with a nitrogen charging device, and the nitrogen charging pipe (101) is provided with a nitrogen valve; an oxygen content analyzer is arranged on the inner wall of the material taking device (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641787.3A CN107490498B (en) | 2017-07-31 | 2017-07-31 | Micro-sintered neodymium-iron-boron magnetic powder hypoxia sampling device and sampling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710641787.3A CN107490498B (en) | 2017-07-31 | 2017-07-31 | Micro-sintered neodymium-iron-boron magnetic powder hypoxia sampling device and sampling method thereof |
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| CN107490498A CN107490498A (en) | 2017-12-19 |
| CN107490498B true CN107490498B (en) | 2024-03-19 |
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2017
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