CN214582458U

CN214582458U - Vacuum pipeline for sintering magnetic steel

Info

Publication number: CN214582458U
Application number: CN202120440507.4U
Authority: CN
Inventors: 倪利军; 许建军; 杨迪锋; 朱启可; 华金城
Original assignee: Hangzhou Zhijiang Magnetics Co ltd
Current assignee: Hangzhou Zhijiang Magnetics Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-11-02
Anticipated expiration: 2031-03-01

Abstract

The utility model provides a vacuum tube for magnet steel sintering, including the boiler tube, carry out evacuation treatment's pumping system to the boiler tube, establish the exhaust tube in boiler tube one end, establish the adaptor between exhaust tube and pumping system, be equipped with the heat preservation in the boiler tube in proper order, the heating member, the sintering chamber, the magnet steel in the sintering chamber heats the sintering through the heating member again after the pumping system evacuation, the adaptor includes the first switching mouth of one end and pumping system intercommunication, establish a plurality of second switching mouths on the valve body, be equipped with sealed lid on the second switching mouth, the one end and one of them second switching mouth of exhaust tube are connected, adaptor accessible second switching mouth communicates a plurality of boiler tubes of taking the exhaust tube, connect and all be equipped with a control valve on each exhaust tube of adaptor, exhaust tube accessible control valve opens and shuts. The problem that the furnace tube for sintering that can't be quick to needs evacuation of same air exhaust system carries out nimble increase and decrease can be solved, connection structure is simple, easy dismounting, and the security is high, and the leakproofness is good.

Description

Vacuum pipeline for sintering magnetic steel

Technical Field

The utility model relates to a magnet steel sintering equipment technical field, concretely relates to vacuum pipeline is used in magnet steel sintering.

Background

The rare earth permanent magnet material mainly comprises a rare earth-cobalt alloy system (namely RE-Co permanent magnet) and a neodymium iron boron alloy (namely Nd-Fe-B permanent magnet). The sintering of the sintered neodymium iron boron refers to a process of heating a green body to a temperature below the melting point of a powder matrix phase and holding the temperature for a period of time in order to further improve the performance and usability of the magnet, improve the contact property between powders, improve the strength and enable the magnet to have high-performance microstructure characteristics. After the powder is compacted, all the bonding between the particles is mechanical bonding, and the bonding strength is extremely low. If the forming pressure is very high, some of the particles which have been in contact with one another already undergo elastic or plastic deformation, in which case the sample is relatively easy to split and its microstructure is not sufficient to produce high magnetic properties. Sintering is the process of changing the powder combination from green to blank, and sintering equipment is needed in the process.

The sintering equipment comprises a tubular structure, such as a magnetic steel vacuum tubular sintering furnace with the patent number of CN201220623624.5 and a double-tubular magnetic steel sintering furnace with the patent number of CN201220623623.0, but the existing tubular sintering furnace has the following defects that 1, the connection structure between an air pumping system and a furnace tube is fixed, and the furnace tube communicated with the air pumping system cannot be rapidly increased or decreased, so that the utilization rate of the air pumping system is low, the sintering power is fixed, and the same air pumping system cannot pump a plurality of furnace tubes at will; 2. when the furnace tube is used for placing and sintering the magnetic steel, the magnetic steel needs to pass through the feeding tube, and the extraction and placing lengths of the magnetic steel are large, so that the difficulty is high; 3. the existing furnace door is generally sealed by a single-channel sealing mechanism, and the problem of poor sealing property easily occurs in the long-term use process.

Disclosure of Invention

In order to solve certain or some technical problem that exists among the prior art, the utility model provides a vacuum pipeline is used in magnet steel sintering can solve the unable quick problem that carries out nimble increase and decrease to the sintering boiler tube that needs the evacuation of same air exhaust system, and connection structure is simple, easy dismounting, and the security is high, and the leakproofness is good.

For solving the above-mentioned prior art problem, the utility model discloses a following scheme:

a vacuum pipeline for sintering magnetic steel comprises a furnace tube, an air exhaust system for vacuumizing the furnace tube, an air exhaust tube arranged at one end of the furnace tube, and a switching piece arranged between the air exhaust tube and the air exhaust system, wherein a heat insulating layer is arranged in the furnace tube, a heating body is arranged in the heat insulating layer, a sintering cavity for placing the magnetic steel is arranged in the heating body, the magnetic steel in the sintering cavity is heated and sintered by the heating body after being vacuumized by the air exhaust system, the switching piece comprises a first switching port with one end communicated with the air exhaust system and a plurality of second switching ports arranged on the switching piece and communicated with the first switching port, a detachable sealing cover is arranged on each second switching port, one end of the air exhaust tube is connected with one of the second switching ports, and the switching piece can be communicated with a plurality of furnace tubes with the air exhaust tube through the second switching ports, and the air exhaust pipes connected to the adapter are provided with a control valve, and the air exhaust pipes can be opened and closed through the control valves.

Furthermore, a circle of fixing rings are annularly arranged on the first switching port and the second switching port, a circle of fixing holes are evenly annularly arranged on the fixing rings, the sealing covers are fixed on the fixing holes through bolts, and a rubber ring for sealing is arranged between the fixing rings and the sealing covers.

Further, the air pumping system comprises a pressure gauge and an air pump, the air pump is a mechanical pump and a diffusion pump, and the mechanical pump is connected with the furnace tube through the diffusion pump.

Furthermore, one end of the furnace tube is provided with a sealing door, a circular mounting groove is formed in the sealing door, a heat insulation layer for sealing the sintering cavity is arranged in the mounting groove, the inner side of the sealing door forms a circle of convex sealing ring through the concave mounting groove, a sealing groove matched with the sealing ring is formed in the furnace tube, and the sealing door is embedded into the sealing groove through the sealing ring after being closed for sealing.

Furthermore, an elastic connecting mechanism and a plurality of locking mechanisms which are annularly arranged at the outer side of the feeding end of the furnace tube are arranged between the furnace tube and the sealing door, the sealing door is locked and opened with the feeding hole of the furnace tube through the locking mechanisms, and the sealing door is connected to one side of the furnace tube in a rotating mode through the elastic connecting mechanism.

Further, the inboard of seal ring is equipped with inside sunken sealing ring, be equipped with on the boiler tube with the seal groove that the sealing ring matches, be equipped with the sealing washer of silicon rubber material preparation in the seal groove, the feed inlet passes through elastic connection mechanism with the insulating layer carries out double sealing.

Furthermore, the elastic connection mechanism comprises an adapter arranged on the furnace tube and a switching arm with two ends respectively connected with the adapter and the sealing door in a rotating manner through shafts, and the switching arm is formed by mutually switching two sheet metal plates through the shafts.

Furthermore, the locking mechanism comprises a plurality of U-shaped bases annularly arranged on the furnace tube, adjusting screws with one ends connected to the U-shaped bases, pressing blocks arranged on the adjusting screws, and a driving disc arranged on the pressing blocks, the pressing blocks move up and down along the adjusting screws through the driving disc, and the closed sealing door is tightly pressed outside the feeding hole through the pressing blocks.

Compared with the prior art, the beneficial effects of the utility model reside in that:

because the air exhaust system is communicated with the furnace tubes connected through the exhaust tubes by the adapter piece, and the adapter piece consists of a first adapter port connected with the air exhaust system and a plurality of second adapter ports capable of being connected with the exhaust tubes, the furnace tubes connected through the exhaust tubes can be installed on the second adapter ports to carry out vacuum pumping treatment at any time according to requirements, the disassembly and the assembly between the furnace tubes and the air exhaust system are more convenient and flexible, the second adapter ports without adapter furnace tubes are sealed by sealing covers, the sealing performance in the whole vacuum pipeline is better, meanwhile, each exhaust tube connected with the adapter piece is provided with a control valve, each exhaust tube can be opened and closed by the corresponding control valve, thereby when a plurality of furnace tubes are connected and only part of the furnace tubes are needed to be started for sintering, the pipeline can be closed for the furnace tubes which do not work, and the vacuum pumping treatment of the furnace tubes which do not work can be avoided, the problem that the furnace tube for sintering that needs the evacuation can't be quick among the effectual prior art of having solved same air exhaust system carries out nimble increase and decrease is carried out, and connection structure is simple, easy dismounting, and the security is high, and the leakproofness is good.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial enlarged view of the furnace tube of the present invention;

fig. 3 is a front view of the furnace tube of the present invention.

In the figure: the device comprises a first adapter port 1, an air extraction system 2, an air extraction pump 3, a pressure gauge 4, an adapter 5, a control valve 6, an air extraction pipe 7, a sintering cavity 8, a heat preservation layer 9, a heating body 10, a furnace pipe 11, a driving disc 12, a sealing door 13, a heat insulation layer 14, a pressing block 15, an adjusting screw 16, a locking mechanism 17, a U-shaped base 18, an adapter seat 19, an elastic connecting mechanism 20, an adapter arm 21, a sealing ring 22, a rubber ring 23, a sealing cover 24, a second adapter port 25, a fixing ring 26, a sealing ring 27, a sealing groove 28, a sealing groove 29, a sealing ring 30 and a mounting groove 31.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1 to 3, a vacuum pipeline for sintering magnetic steel comprises a furnace tube 11, an air pumping system 2 for performing vacuum-pumping treatment on the furnace tube 11, an air pumping tube 7 arranged at one end of the furnace tube 11, and an adapter 5 arranged between the air pumping tube 7 and the air pumping system 2, wherein a heat insulating layer 9 is arranged in the furnace tube 11, a heating body 10 is arranged in the heat insulating layer 9, a sintering chamber 8 for placing the magnetic steel is arranged in the heating body 10, the magnetic steel in the sintering chamber 8 is heated and sintered by the heating body 10 after being vacuumized by the air pumping system 2, the adapter 5 comprises a first adapter 1 with one end communicated with the air pumping system 2, a plurality of second adapter ports 25 arranged on the adapter 5 and communicated with the first adapter ports 1, a detachable sealing cover 24 is arranged on the second adapter ports 25, one end of the air pumping tube 7 is connected with one of the second adapter ports 25, the adaptor 5 can be communicated with a plurality of furnace tubes 11 with the air exhaust tubes 7 through the second adaptor port 25, each air exhaust tube 7 connected to the adaptor 5 is provided with a control valve 6, and the air exhaust tubes 7 can be opened and closed through the control valves 6; the air extraction system 2 comprises a pressure gauge 4 and an air extraction pump 3, the air extraction pump 3 is a mechanical pump and a diffusion pump, and the mechanical pump is connected with the furnace tube 11 through the diffusion pump.

In the practical use process, the magnetic steel is placed in the sintering cavity 8, then the air pumping system 2 is used for vacuumizing the furnace tube 11 through the external controller, the pressure in the furnace tube 11 and the air pumping tube 7 can be observed in real time through the pressure gauge 4 after vacuumizing, then the heating body 10 is started through the external controller to heat and sinter the magnetic steel in the furnace tube 11, as the air pumping system 2 is communicated with the furnace tube 11 connected through the air pumping tube 7 through the adapter piece 5, and the adapter piece 5 consists of the first adapter port 1 connected with the air pumping system 2 and a plurality of second adapter ports 25 connected with the air pumping tube 7, the furnace tube 11 connected through the air pumping tube 7 can be installed on the second adapter port 25 at any time according to requirements for vacuumizing, the disassembly and assembly between the furnace tube 11 and the air pumping system 2 are more convenient and flexible, and the second adapter port 25 without the adapter tube 11 is also sealed through the sealing cover 24, the leakproofness in the whole vacuum pipeline is better, simultaneously, connect and all be equipped with a control valve 6 on each exhaust tube 7 of adaptor 5, every exhaust tube 7 all can open and shut through the control valve 6 that corresponds, thereby when making to connect a plurality of boiler tubes 11 and only need launch partial boiler tube 11 sintering, can carry out the closure of pipeline to inoperative boiler tube 11, evacuation processing appears in the boiler tube 11 of avoiding appearing non-operating condition, the effectual problem of carrying out nimble increase and decrease to the boiler tube 11 for the sintering that needs the evacuation that same air exhaust system 2 can't be quick among the prior art has been solved, simple connection structure, and easy dismounting, high safety, good sealing performance.

The further improvement is that a circle of fixing rings 26 are annularly arranged on the first adapter port 1 and the second adapter port 25, a circle of fixing holes are evenly annularly arranged on the fixing rings 26, the sealing cover 24 is fixed on the fixing holes through bolts, and a rubber ring 23 for sealing is arranged between the fixing rings 26 and the sealing cover 24.

When being connected exhaust tube 7, sealed lid 24 and second switching mouth 25, can be quick fix on the fixed orifices through the bolt, the dismouting is more convenient, and gu install the rubber circle 23 of sealed usefulness between fixed ring 26 and sealed lid 24 or the exhaust tube 7 in addition, can make seam crossing avoid appearing gas leakage phenomenon through sealing washer 27, make the leakproofness in the whole vacuum pipe better, the evacuation effect is better.

The improved furnace tube structure is characterized in that a sealing door 13 is arranged at one end of the furnace tube 11, a circular mounting groove 31 is formed in the sealing door 13, a heat insulation layer 14 for sealing the sintering chamber 8 is arranged in the mounting groove 31, a circle of convex sealing ring 22 is formed on the inner side of the sealing door 13 through the concave mounting groove 31, a sealing groove 29 matched with the sealing ring 22 is formed in the furnace tube 11, and the sealing door 13 is embedded into the sealing groove 29 through the sealing ring 22 for sealing after being closed.

The sealing door 13 is directly arranged at one end of the furnace tube 11, the magnetic steel in the furnace tube 11 can be quickly taken and put in by opening the sealing door 13 without passing through a feeding tube, the efficiency is higher, when the sintering chamber 8 is sealed by the sealing door 13, an outward convex structure is formed in the middle of the sealing door 13, so that the inside is formed into a circular mounting groove 31, and after the insulation layer 14 is fixed in the mounting groove 31, the thickness of the heat insulation layer 14 can be larger, the heat insulation effect is higher, the sealing door 13 forms a circular outer ring through the structure of the circular mounting groove 31, namely a sealing ring 22 structure which is convex outwards, and a sealing groove 29 which is matched with the sealing ring 22 is arranged on the furnace body, when the sealing door 13 is closed, the sealing ring 22 can be just inserted into the sealing groove 29 for sealing, thereby make sealing door 13's location effect better, effectual fixed insecure and the poor problem of sealed effect of current sealing door 13 of having solved.

The further improvement is that an elastic connecting mechanism 20 and a plurality of locking mechanisms 17 annularly arranged at the outer side of the feeding end of the furnace tube 11 are arranged between the furnace tube 11 and the sealing door 13, the sealing door 13 is locked and unlocked with the feeding port of the furnace tube 11 through the locking mechanisms 17, and the sealing door 13 is switched to one side of the furnace tube 11 through the elastic connecting mechanism 20; an inward-concave sealing ring 30 is arranged on the inner side of the sealing ring 22, a sealing groove 28 matched with the sealing ring 30 is arranged on the furnace tube 11, a sealing ring 27 made of a silicon rubber material is arranged in the sealing groove 28, and the feed inlet is doubly sealed through the elastic connecting mechanism 20 and the heat insulation layer 14; the elastic connection mechanism 20 comprises an adapter 19 arranged on the furnace tube 11 and a switching arm 21 with two ends respectively connected with the adapter 19 and the sealing door 13 through shafts in a rotating manner, and the switching arm 21 is formed by mutually switching two sheet metal plates through the shafts.

When the sealing door 13 is opened and closed through the elastic connecting mechanism 20, because the two ends of the transfer arm 21 are respectively connected to the transfer seat 19 and the sealing door 13 through the shaft in a rotating way, the flexibility of the door can be better when the door is opened, the door is farther away from the feeding hole of the furnace tube 11, the situation that the thermal insulation layer 14 in the door scalds workers taking the magnetic steel due to overhigh temperature is avoided, the height position of the sealing door 13 can be limited through the transfer arm 21, so that the height position of the sealing door does not generate deviation in the closing process after being opened, since the thermal insulation layer 14 and the sealing ring 27 have certain elasticity, and when the switching arm 21 is formed by switching two sheet metal plates through a shaft, after the sealing door 13 is flatly attached to the outer side of the furnace tube 11, automatic left and right adjustment can be performed through different pressures of the locking mechanisms 17 at various positions, so that automatic flatness adjustment can be realized no matter how much depth the sealing door 13 is embedded into the sealing groove 29 and the sealing groove 28 after being closed.

When sealing door 13 is in the closed back, because sealing ring 30 is the indent structure, and trade with sealing and adopt the concentric circles structure, make sealing door 13 form double seal structure after closing, be equipped with the sealing washer 27 of silicon rubber material preparation in the seal groove 28 simultaneously, after sealing door 13 closed, can realize once sealedly through the cooperation of insulating layer 14 with heat preservation 9, can realize the secondary seal through sealing washer 27 and sealing ring 30's press fit, thereby make sintering chamber 8 realize double seal's effect, sintering chamber 8 leakproofness is better when the sintering, sealing washer 27 adopts the silicon rubber material preparation to form, high temperature resistant while, can also supply passing through of gases such as nitrogen gas.

In a further improvement, the locking mechanism 17 includes a plurality of U-shaped bases 18 annularly arranged on the furnace tube 11, an adjusting screw 16 with one end connected to the U-shaped bases 18, a pressing block 15 arranged on the adjusting screw 16, and a driving disc 12 arranged on the pressing block 15, wherein the pressing block 15 moves up and down along the adjusting screw 16 through the driving disc 12, and the closed sealing door 13 is pressed outside the feed port through the pressing block 15.

When locking sealing door 13 through locking mechanism 17, because sealing door 13's outer lane is the ring type structure, and the outside is the horizontal plane, only need to control driving-disc 12 to briquetting 15 along adjusting screw 16 inside removal after turning over adjusting screw 16 to sealing door 13 direction, just can make briquetting 15 and sealing door 13 produce the extrusion locking, and locking mechanism 17 adopts a plurality of designs, can be better to sealing door 13's sealed effect, stability is higher during the closure, adopt driving-disc 12 structure to control, the atress is more convenient.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a vacuum pipeline is used in magnet steel sintering, includes the boiler tube, right the boiler tube carries out evacuation treatment's air exhaust system, establishes the exhaust tube of boiler tube one end, establishes exhaust tube with adaptor between the air exhaust system, be equipped with the heat preservation in the boiler tube, be equipped with the heating member in the heat preservation, be equipped with the sintering chamber of placing the magnet steel in the heating member, the magnet steel of sintering intracavity passes through behind the evacuation of air exhaust system again by the heating member heats sintering, its characterized in that: the adapter piece includes one end with the first switching mouth of air exhaust system intercommunication, establish on the adapter piece with a plurality of second switching mouths of first switching mouth intercommunication, be equipped with the sealed lid of detachable on the second switching mouth, the one end and one of them of exhaust tube the second switching mouth is connected, the adapter piece accessible the second switching mouth intercommunication is many to be taken the boiler tube of exhaust tube, connect in each of adapter piece all be equipped with a control valve on the exhaust tube, the exhaust tube accessible the control valve opens and shuts.

2. The vacuum pipeline for sintering magnetic steel according to claim 1, wherein: the first switching port and the second switching port are respectively provided with a circle of fixing rings in an encircling manner, the fixing rings are respectively provided with a circle of fixing holes in an encircling manner, the sealing covers are fixed on the fixing holes through bolts, and a rubber ring for sealing is arranged between the fixing rings and the sealing covers.

3. The vacuum pipeline for sintering magnetic steel according to claim 1, wherein: the air pumping system comprises a pressure gauge and an air pump, the air pump is a mechanical pump and a diffusion pump, and the mechanical pump is connected with the furnace tube through the diffusion pump.

4. The vacuum pipeline for sintering magnetic steel according to any one of claims 1 to 3, wherein: the furnace tube is characterized in that a sealing door is arranged at one end of the furnace tube, a circular mounting groove is formed in the sealing door, a heat insulation layer for sealing the sintering cavity is arranged in the mounting groove, the inner side of the sealing door is recessed, the mounting groove forms a round of raised sealing ring, a sealing groove matched with the sealing ring is formed in the furnace tube, and the sealing door is embedded into the sealing groove for sealing after being closed.

5. The vacuum pipeline for sintering magnetic steel according to claim 4, wherein: the sealing door is locked and opened with the feed inlet of the furnace tube through the locking mechanism, and is connected to one side of the furnace tube through the elastic connection mechanism in a switching mode.

6. The vacuum pipeline for sintering magnetic steel according to claim 5, wherein: the inside of seal ring is equipped with inside sunken sealing ring, be equipped with on the boiler tube with the seal groove that the sealing ring matches, be equipped with the sealing washer of silicon rubber material preparation in the seal groove, the feed inlet passes through elastic connection mechanism with the insulating layer carries out double sealing.

7. The vacuum pipeline for sintering magnetic steel according to claim 6, wherein: the elastic connection mechanism comprises a switching seat arranged on the furnace tube and a switching arm, wherein two ends of the switching arm are respectively connected with the switching seat and the sealing door in a rotating mode through shafts, and the switching arm is formed by mutually switching two sheet metal plates through the shafts.

8. The vacuum pipeline for sintering magnetic steel according to claim 5, wherein: the locking mechanism comprises a plurality of U-shaped bases annularly arranged on the furnace tube, an adjusting screw rod with one end connected to the U-shaped bases in a switching mode, a pressing block arranged on the adjusting screw rod, and a driving disc arranged on the pressing block, wherein the pressing block moves up and down along the adjusting screw rod through the driving disc, and the sealing door is closed and tightly pressed outside the feed inlet through the pressing block.