CN215113797U - Continuous negative pressure drying furnace - Google Patents
Continuous negative pressure drying furnace Download PDFInfo
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- CN215113797U CN215113797U CN202121397032.1U CN202121397032U CN215113797U CN 215113797 U CN215113797 U CN 215113797U CN 202121397032 U CN202121397032 U CN 202121397032U CN 215113797 U CN215113797 U CN 215113797U
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- drying
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- 238000001035 drying Methods 0.000 title claims abstract description 91
- 239000000843 powder Substances 0.000 claims abstract description 63
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 230000008676 import Effects 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 6
- 238000010924 continuous production Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000009692 water atomization Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model discloses a continuous type negative pressure drying furnace, including the drying furnace that is equipped with the conveyer belt, characterized by is in the top of drying furnace import position conveyer belt is equipped with the loading hopper, and drying furnace goes out powder oral area position and is equipped with the pressure powder roller to draw forth the steam honeycomb duct from the drying furnace chamber, steam honeycomb duct is connected to the negative pressure pump. The vacuum-pumping equipment is introduced into the continuous drying furnace body, the self-closing effect of the powder slurry on the inlet of the drying furnace is utilized, the powder pressing roller is arranged at the powder outlet, the air tightness in the drying cavity is greatly improved, negative pressure is always kept in the whole drying furnace, the drying efficiency is improved, the phenomenon of residual moisture in the dried powder is avoided, the equipment is simple, the operation is easy, full-automatic operation can be realized, and the requirement on the working condition of a continuous production line is met.
Description
Technical Field
The utility model relates to a powder metallurgy equipment technique, especially a continuous type negative pressure drying furnace.
Background
The powder metallurgy product has the advantages of high material utilization rate and high production efficiency, and is mainly applied to the fields of automobiles, household appliances, machinery and the like. The metal powder as a basic material thereof has an important influence on the performance of parts after press firing. In the process of preparing the powder by water atomization, the drying process of the powder plays an important role in subsequent reduction. At present, the drying is mainly to evaporate water and gas at high temperature under normal pressure, for example, the patent publication number is CN111288765A, a semi-automatic drying device for metal powder comprises a furnace body, a nitrogen input device and an air draft device, and the waste heat of low-temperature circulating cooling water flowing out of a medium-frequency smelting furnace is utilized to dry the powder, so that the oxygen increasing action in the powder drying process is eliminated. And the like, and the method has low efficiency, and after long-time drying, the moisture in the powder can be remained. The condition can influence the following reduction process, reduce the reduction efficiency and degree of the reduction atmosphere on the powder, and greatly influence the performance of the final product.
Also with the drying operation by the negative pressure method, for example, patent publication No. CN111536775A, a system and method for drying metal powder by negative pressure, the system includes a drying apparatus including a drying furnace, one side of which is fed with raw metal powder; and a heating chamber which is provided around the outer periphery thereof in a state of being spaced apart from the drying furnace and heats the drying furnace; a raw material input device which is connected to the upper part of the drying furnace and inputs the raw material metal powder into the drying furnace; a stirring device installed in the drying furnace and stirring the raw material metal powder input into the drying furnace; a driving device installed at an upper portion of the drying device and providing a speed to the stirring device; a steam device which supplies steam into the heating chamber; a bag filter installed at an upper portion of the drying furnace, sucking the raw metal powder and the steam, discharging the steam, and dropping the raw metal powder into the drying furnace; a condenser connected to one side of the bag filter and drying air by converting the discharged steam into water; and a vacuum pump for bringing the drying furnace into a negative pressure state by forming a vacuum pressure. The device has the same lower efficiency, can only feed materials once according to the fixed capacity of the drying furnace, can discharge materials once after drying, and cannot meet the requirement of continuous production line operation.
Disclosure of Invention
The utility model aims at solving the moisture in traditional ordinary pressure drying furnace can not effectively detach water atomization back powder in the short time, and reduce and produce the property ability, and current negative pressure formula barrel drying furnace can not realize continuous assembly line operation scheduling problem, provide a continuous type negative pressure drying furnace, it has assembly line continuous operation mode, thereby the ingenious powder self physical state nature that utilizes makes the drying furnace obtain certain negative pressure and accelerate the characteristics that the aqueous vapor spills over.
The above technical problem of the present invention can be solved by the following technical solutions: the continuous negative pressure drying furnace comprises a drying furnace with a conveyer belt, and is characterized in that a charging hopper is arranged above the conveyer belt at the inlet part of the drying furnace, a powder pressing roller is arranged at the powder outlet part of the drying furnace, a steam guide pipe is led out from a furnace chamber of the drying furnace, and the steam guide pipe is connected to a negative pressure pump.
In the foregoing continuous negative pressure drying furnace, preferably, the feeding hopper has a flat discharging pipe having an inclination angle of 60 degrees or more with the conveying belt, and the flat discharging pipe is provided with a vibrator.
In the foregoing continuous negative pressure drying furnace, preferably, the bottom plate of the discharging flat tube of the charging hopper is of a corrugated plate structure.
In the continuous negative pressure drying furnace, preferably, a sealing mechanism is arranged at a matching position of the powder pressing roller and the drying furnace box body.
In the foregoing continuous negative pressure drying furnace, preferably, the flat discharge pipe of the charging hopper is further provided with a material level indicator.
In the continuous negative pressure drying furnace, preferably, the powder pressing roller is of a following roller structure.
In the continuous negative pressure drying furnace, the powder pressing roller preferably has a height adjusting device.
In the continuous negative pressure drying furnace, preferably, the exhaust port of the negative pressure pump is provided with a dust removing bag.
This technical scheme is equipped the object with the continuous drying furnace that has the conveyer belt as the basis, set up the loading hopper that can accuse powder flow volume in the top of drying furnace import position conveyer belt, the whitewashed thick liquid after utilizing the water atomization can carry out interim "closed" characteristics to this entry at the loading hopper front end, and go out powder mouthful department at the drying furnace tail and set up the pressure powder roller, make the drying furnace inner chamber can keep certain negative pressure, thereby it spills over to accelerate the aqueous vapor, it is connected to the negative pressure pump air inlet to spill over aqueous vapor honeycomb duct, can reduce moisture content in the short time, guarantee that the powder after the drying no longer appears moisture and remains.
Further, in order to satisfy the loading hopper continuous operation, long-pending material, stifled material, this scheme has designed and has just had the flat pipe of ejection of compact at certain inclination with the cooperation of conveyer belt width to set up the electromagnetic shaker on the flat pipe of ejection of compact, with the needs from time to time. Similarly, the bottom plate on one side below the discharging flat tube of the feeding hopper is designed into a corrugated plate structure, so that the flow resistance between the hopper and the powder can be properly improved, and the continuous feeding of the powder with relatively low humidity is met. According to this scheme principle, can set up the material level ware on flat pipe of loading hopper ejection of compact, remind the staff to guarantee that the powder thick liquid keeps "sealing" to the charge door all the time in the course of the work.
The powder pressing roller arranged at the powder outlet position at the tail end of the drying furnace can be used as an outlet sealing means and can play a role in material homogenizing, so that the output powder is kept balanced. And the powder pressing roller does not need power and automatically follows up through friction with the powder. The powder pressing roller is also provided with a height adjusting device, and the height is adjusted according to the actual workload, so that different working conditions are met.
Compared with the prior art, the technical scheme has the beneficial effects that: the vacuum-pumping equipment is introduced into the continuous drying furnace body, the self-closing effect of the powder slurry on the inlet of the drying furnace is utilized, the powder pressing roller is arranged at the powder outlet, the air tightness in the drying cavity is greatly improved, negative pressure is always kept in the whole drying furnace, the drying efficiency is improved, the phenomenon of residual moisture in the dried powder is avoided, the equipment is simple, the operation is easy, full-automatic operation can be realized, and the requirement on the working condition of a continuous production line is met.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of an embodiment of the loading hopper of the present invention.
In the figure: 1. the powder drying device comprises a charging hopper, 2 a drying furnace, 3 a steam guide pipe, 4 a negative pressure pump, 5a powder pressing roller, 6 a heating rod, 7 a conveying belt and 8 a powder slurry.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Referring to fig. 1 and 2, the continuous negative pressure drying oven of the present embodiment is a horizontally arranged drying oven 2 with a certain length, and a conveyor belt 7 transports slurry 8 through the drying oven 2. The inlet end of the drying furnace 2 is provided with a rubber scraper at the penetrating part of the conveyer belt 7 for sealing. A charging hopper 1 is arranged above the conveying belt 7 at the inlet part of the drying furnace 2. The charging hopper 1 is provided with a discharging flat pipe which forms an inclination angle of 70 degrees with the conveying belt 7, the outlet of the discharging flat pipe is positioned at the inner side of the rubber scraper, the bottom plate (namely, the side with a relatively low height) of the discharging flat pipe is of a corrugated plate structure, a vibrator and a material level device are arranged on the discharging flat pipe, and a glass perspective window is arranged on the shell of the charging hopper 1 at the material level device.
Two groups of heating rods 6 are uniformly arranged in the upper and lower directions of a conveying belt 7 in the hearth of the drying furnace 2.
The height of the powder outlet of the drying furnace 2 is set according to the processing capacity of the drying furnace 2, and a powder pressing roller 5 is arranged at the powder outlet. A sealing mechanism made of rubber sheets is arranged at the matching part of the powder pressing roller 5 and the drying furnace 2 box body. The powder pressing roller 5 is a follow-up roller structure, two ends of the powder pressing roller are positioned in bearing seats, the bearing seats are positioned on a vertical frame, and guide rails for limiting the bearing seats up and down are arranged in the vertical frame, so that the bearing seats can move up and down and are locked along the vertical frame, and the purpose of adjusting the height of the powder pressing roller 5 is achieved.
A steam guide pipe 3 is upwards led out from the furnace chamber of the drying furnace 2, and the steam guide pipe 3 is connected to a negative pressure pump 4. The exhaust port of the negative pressure pump 4 is provided with a dust removal bag.
When in use, the drying furnace 2 is firstly turned on to heat the power supply, so that the temperature reaches the drying temperature; then, starting a negative pressure pump 4 to keep a certain negative pressure in the drying furnace 2; slowly pouring the dehydrated slurry 8 into the feeding hopper 1, and keeping the height of the slurry 8 in the feeding hopper 1 after a period of time; and after stabilizing for a period of time, observing the height of the powder block at the powder outlet of the drying furnace 2, and adjusting the height of the powder pressing roller 5 until the powder pressing roller 5 is in a follow-up state.
The above embodiments are illustrations of the present invention, not limitations of the present invention, and any formulas, methods, etc. after simple transformation of the present invention all belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a continuous type negative pressure drying furnace, is including being equipped with drying furnace (2) of conveyer belt (7), characterized by is in the top of drying furnace import position conveyer belt is equipped with loading hopper (1), and drying furnace powder outlet position is equipped with powder pressing roller (5) to draw forth steam honeycomb duct (3) in the drying furnace chamber, steam honeycomb duct is connected to negative pressure pump (4).
2. The continuous negative pressure drying furnace of claim 1, wherein: the feeding hopper (1) is provided with a discharging flat pipe which forms an inclination angle of more than or equal to 60 degrees with the conveying belt (7), and the discharging flat pipe is provided with a vibrator.
3. The continuous negative pressure drying furnace of claim 2, wherein: the flat discharge pipe bottom plate of the charging hopper (1) is of a corrugated plate structure.
4. The continuous negative pressure drying furnace of claim 1, wherein: and a sealing mechanism is arranged at the matching part of the powder pressing roller (5) and the drying furnace (2) box body.
5. A continuous negative pressure drying oven according to claim 2 or 3, characterized in that: a material level device is further arranged on the discharging flat tube of the charging hopper (1).
6. The continuous negative pressure drying furnace of claim 1, wherein: the powder pressing roller (5) is of a follow-up roller structure.
7. The continuous negative pressure drying furnace according to claim 1 or 6, wherein: the powder pressing roller (5) is provided with a height adjusting device.
8. The continuous negative pressure drying furnace of claim 1, wherein: and a dust removal bag is arranged at an exhaust port of the negative pressure pump (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121397032.1U CN215113797U (en) | 2021-06-23 | 2021-06-23 | Continuous negative pressure drying furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121397032.1U CN215113797U (en) | 2021-06-23 | 2021-06-23 | Continuous negative pressure drying furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215113797U true CN215113797U (en) | 2021-12-10 |
Family
ID=79310208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121397032.1U Active CN215113797U (en) | 2021-06-23 | 2021-06-23 | Continuous negative pressure drying furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215113797U (en) |
-
2021
- 2021-06-23 CN CN202121397032.1U patent/CN215113797U/en active Active
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