CN110079657B - Gas mixing and feeding device in saw blade tempering furnace - Google Patents
Gas mixing and feeding device in saw blade tempering furnace Download PDFInfo
- Publication number
- CN110079657B CN110079657B CN201910414044.1A CN201910414044A CN110079657B CN 110079657 B CN110079657 B CN 110079657B CN 201910414044 A CN201910414044 A CN 201910414044A CN 110079657 B CN110079657 B CN 110079657B
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- gas
- furnace
- furnace body
- saw blade
- pipe
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- 238000002156 mixing Methods 0.000 title claims abstract description 39
- 238000005496 tempering Methods 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000009423 ventilation Methods 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/24—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for saw blades
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a gas mixing and supplying device in a tempering furnace, which can uniformly distribute gas in the tempering furnace and can generate salient points which are easy to attach on the surface of a saw blade after tempering, and the gas mixing and supplying device comprises at least three gas distributing pipes penetrating through the gas supplying pipes, wherein the gas supplying pipes are arranged on the inner wall of the furnace body along the axial direction of the furnace body; still including setting up at the outer inclosed barrel of stove, be equipped with two annular supports relatively on the barrel, be equipped with the bearing frame on the annular support, wear to be equipped with the hybrid shaft between two bearing frames, be equipped with drive hybrid shaft pivoted power device on the barrel, be equipped with a plurality of circulation holes that supply gas passed through on the support, be equipped with oxygen intake pipe and nitrogen gas intake pipe on the barrel, be equipped with two to four turbine blade respectively on the both ends of hybrid shaft outside the bearing frame, the opposite side is equipped with the gas outlet pipe on the barrel, the gas outlet pipe is connected with the interior air supply pipe of tempering furnace, outside cover at the hybrid shaft between two supports is equipped with the air duct.
Description
Technical Field
The invention relates to a gas mixing and supplying device in a saw blade tempering furnace.
Background
In the existing tempering furnaces, a stirring shaft is often arranged to uniformly distribute heated gas (usually nitrogen) in the furnace, for example, a tempering device disclosed in patent ZL 201720293559.7. Otherwise, a plurality of tempering dead angles appear in the furnace chamber during tempering, and the uniformity of the temperature field is poor, so that workpieces are heated unevenly, the tempering quality is affected, the reject ratio is increased, and the cost is increased; and the workpieces are mostly not stacked, so that the space utilization rate of the hearth is low.
Saw blades are usually tempered and then taken out of a tempering furnace to be pickled, and then surface phosphating is carried out to generate a surface with protruding points, which is used for better attaching a lacquer surface in the subsequent painting, the process flow is complex, a large amount of waste liquid which needs post-treatment to avoid polluting the environment is generated in the production process, and the processing cost is high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a gas mixing and supplying device in a tempering furnace is provided, which can uniformly distribute gas in the tempering furnace and can generate salient points on the surface of a saw blade after tempering, wherein the salient points are easy to attach to a painted surface.
In order to solve the technical problems, the invention adopts the following technical scheme: the gas mixing and supplying device in the saw blade tempering furnace comprises a spiral gas supply pipe arranged on the inner wall of the furnace body, at least three gas distribution pipes penetrating through the gas supply pipe are arranged on the inner wall of the furnace body along the axial direction of the furnace body, gas outlet holes are arranged on the part, facing the hearth, of the gas supply pipe, and the aperture of each gas outlet hole is gradually increased along the direction away from the gas inlet end; still including setting up at the outer inclosed barrel of stove, be equipped with two annular supports relatively on the barrel, be equipped with the bearing frame on the annular support, wear to be equipped with the hybrid shaft between two bearing frames, be equipped with drive hybrid shaft pivoted power device on the barrel, be equipped with a plurality of circulation holes that supply gas passed through on the support, be equipped with oxygen intake pipe and nitrogen gas intake pipe on the barrel, be equipped with flowmeter and solenoid valve in the oxygen intake pipe, be equipped with flowmeter and solenoid valve in the nitrogen gas intake pipe, be equipped with two to four turbine blade respectively on the both ends of hybrid shaft outside the bearing frame, the opposite side is equipped with the gas outlet pipe on the barrel, the gas outlet pipe is connected with tempering furnace internal air supply pipe, outside cover at the hybrid shaft between two supports is equipped with the air duct.
As a preferred solution, the mixing shaft is provided with a number of short blades between two bearing blocks.
As a preferable mode, the short blades are spirally distributed on the mixing shaft, and the short blades incline from the root part to the air inlet direction.
As a preferable scheme, the power device comprises a servo driving motor and a speed increaser which are connected, the speed increaser is arranged in the cylinder body, and an output shaft of the speed increaser is connected with the mixing shaft through a pair of bevel gears.
The beneficial effects of the invention are as follows:
the gas mixing and supplying device in the saw blade tempering furnace comprises a spiral gas supply pipe arranged on the inner wall of the furnace body, at least three gas distribution pipes penetrating through the gas supply pipe are arranged on the inner wall of the furnace body along the axial direction of the furnace body, gas outlet holes are arranged on the part, facing the hearth, of the gas supply pipe, and the aperture of each gas outlet hole is gradually increased along the direction away from the gas inlet end; the hot air in the hearth is uniformly distributed, so that the products in the hearth can be fully tempered;
because the device for uniformly mixing the oxygen and the nitrogen is further included, the uniformly mixed gas can be introduced into the hearth in the later tempering stage, so that the effect of oxidizing the surface of the saw blade is achieved, the cost rise caused by an acid washing process is avoided, and the production of processing waste is reduced.
Because the cylinder is relatively provided with two annular supports, the annular supports are provided with bearing seats, a mixing shaft is arranged between the two bearing seats in a penetrating manner, a plurality of circulating holes for gas to pass through are formed in the supports, two to four turbine blades are respectively arranged at two ends of the mixing shaft outside the bearing seats, and an air duct is sleeved outside the mixing shaft between the two supports, so that gas passes through the supports and the air duct area with smaller circulating areas after coming out of the first group of turbine blades, and then flows to the second group of turbine blades, the gas flows more severely due to the change of the circulating areas, and the two gases can be fully and uniformly mixed in a shorter flow, so that the overall structure of the mixing device is compact.
Because the mixing shaft is provided with a plurality of short blades between the two bearing seats, the mixing effect is enhanced.
The short blades are spirally distributed on the mixing shaft, and incline from the root to the air inlet direction, so that the area of the blades in a limited space is larger, and the mixing effect is enhanced.
Because the power device comprises the servo driving motor and the speed increaser which are connected, the speed increaser is arranged in the cylinder body, the output shaft of the speed increaser is connected with the mixing shaft through a pair of bevel gears, and the input shaft of the speed increaser arranged in the cylinder body is not easy to lose efficacy due to the sealing fit between the input shaft and the cylinder body due to lower rotating speed.
Drawings
Fig. 1 is a schematic diagram of the front view structure of the present invention.
In fig. 1: 1. the device comprises a cylinder body, an annular support, a bearing seat, a mixing shaft, short blades, a driving motor, a speed increaser, a bevel gear, a first gas inlet pipe, a second gas inlet pipe, a flowmeter, a second gas inlet pipe, a flow meter and a valve, 12, solenoid valve, 13, flowmeter, 14, solenoid valve, 15, turbine blade, 16, gas outlet pipe, 17, air duct, 18, gas supply pipe, 19, gas distribution pipe, 20, gas outlet hole, 21, furnace body, 22, circulating air pipe.
Detailed Description
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the gas mixing and feeding device in the saw blade tempering furnace comprises a spiral gas supply pipe 18 arranged on the inner wall of a furnace body 21, four gas distribution pipes 19 penetrating through the gas supply pipe 18 and arranged on the inner wall of the furnace body 21 along the axial direction of the furnace body 21, and gas outlet holes 20 arranged on the part, facing to a hearth, of the gas supply pipe 18, wherein the aperture of each gas outlet hole 20 is gradually increased along the direction away from a gas inlet end; one end of the gas distributing pipe 19 is closed, and the other end is communicated with the annular gas inlet pipe;
the device also comprises a sealed cylinder body 1 arranged outside the furnace body 21, two annular supports 2 are arranged in the cylinder body 1, a bearing seat 3 is arranged on the annular supports 2, a mixing shaft 4 is arranged between the two bearing seats 3 in a penetrating manner, and a plurality of short blades 5 are arranged between the two bearing seats 3 on the mixing shaft 4. The short blades 5 are spirally distributed on the mixing shaft 4, and the short blades 5 incline upwards from the root to the air inlet direction.
The cylinder 1 is provided with a power device for driving the mixing shaft 4 to rotate, the power device comprises a driving motor 6 and a speed increaser 7 which are connected, the speed increaser 7 is arranged inside the cylinder 1, and an output shaft of the speed increaser 7 is connected with the mixing shaft 4 through a pair of bevel gears 8.
The support is provided with a plurality of ventilation holes for gas to pass through, one side of the cylinder body 1 is provided with an oxygen inlet pipe 10 and a nitrogen inlet pipe 9, the oxygen inlet pipe 10 is provided with a flowmeter 13 and an electromagnetic valve 14, the nitrogen inlet pipe 9 is provided with a flowmeter 11 and an electromagnetic valve 12, and the nitrogen inlet pipe 9 is also communicated with the inner cavity of the tempering furnace through a circulating air pipe 22 with a control valve.
Two turbine blades 15 are respectively arranged at two ends of the mixing shaft 4 outside the bearing seat 3, a gas outlet pipe 16 is arranged at the other side of the cylinder body 1, the gas outlet pipe 16 is connected with a tempering furnace inner gas supply pipe 18, and a wind guide cylinder 17 is sleeved outside the mixing shaft 4 between the two supports.
The electromagnetic valve 14 on the oxygen inlet pipe 10 is closed in the early stage of tempering, the power device does not work, only a certain amount of nitrogen is input into the furnace body 21, the electromagnetic valve 14 on the oxygen inlet pipe 10 and the electromagnetic valve 12 on the nitrogen inlet pipe 9 are closed in the tempering process, the power device runs at a low speed, nitrogen in the furnace is circulated through the circulating air pipe 22 so as to ensure uniform temperature in the furnace, after the crystal phase conversion on the saw blade is completed, the electromagnetic valve 14 on the oxygen inlet pipe 10 is opened, the power device drives the mixing shaft 4 to rotate and mix oxygen and nitrogen in five minutes and inputs the mixed oxygen and nitrogen into the furnace body 21, wherein the total amount of oxygen is 90-150ml, oxygen molecules are sprayed onto the surface of the high Wen Jutiao to form severe combustion (similar to tiny explosion) with substances on the surface of the saw blade so as to form explosion bumps on the surface of the saw blade, so that the metal surface has good passivation treatment characteristics, the effect achieved by phosphating can be completely achieved, the cost rise caused by the acid washing phosphating process is avoided, and the production of processing waste is reduced.
The above-described embodiments are merely illustrative of the principles and functions of the present invention, and some of the practical examples, not intended to limit the invention; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (4)
1. Gas mixing and feeding device in saw blade tempering furnace, its characterized in that: the furnace comprises a spiral air supply pipe arranged on the inner wall of a furnace body, at least three air distribution pipes penetrating through the air supply pipe are arranged on the inner wall of the furnace body along the axial direction of the furnace body, air outlet holes are arranged on the part, facing to a hearth, of the air supply pipe, and the aperture of each air outlet hole is gradually increased along the direction away from an air inlet end; the device comprises a furnace body, a mixing shaft, a power device, a plurality of ventilation holes, an oxygen inlet pipe, a nitrogen inlet pipe, a flowmeter and an electromagnetic valve, wherein the furnace body is arranged outside the furnace body; the nitrogen inlet pipe is also communicated with the inner cavity of the tempering furnace through a circulating air pipe with a control valve.
2. The gas mixing and feeding device in a saw blade tempering furnace according to claim 1, wherein: a plurality of short blades are arranged between the two bearing seats on the mixing shaft.
3. The gas mixing and feeding device in a saw blade tempering furnace according to claim 2, wherein: the short blades are spirally distributed on the mixing shaft, and incline from the root to the air inlet direction.
4. A gas mixing feed apparatus in a saw blade tempering furnace according to claim 3, wherein: the power device comprises a servo driving motor and a speed increaser which are connected, the speed increaser is arranged in the cylinder body, and an output shaft of the speed increaser is connected with the mixing shaft through a pair of bevel gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414044.1A CN110079657B (en) | 2019-05-17 | 2019-05-17 | Gas mixing and feeding device in saw blade tempering furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414044.1A CN110079657B (en) | 2019-05-17 | 2019-05-17 | Gas mixing and feeding device in saw blade tempering furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110079657A CN110079657A (en) | 2019-08-02 |
| CN110079657B true CN110079657B (en) | 2024-01-26 |
Family
ID=67420793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910414044.1A Active CN110079657B (en) | 2019-05-17 | 2019-05-17 | Gas mixing and feeding device in saw blade tempering furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110079657B (en) |
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| JPH07198263A (en) * | 1993-01-13 | 1995-08-01 | Furukawa Electric Co Ltd:The | Nitrogen gas atmosphere heating device |
| US5441581A (en) * | 1994-06-06 | 1995-08-15 | Praxair Technology, Inc. | Process and apparatus for producing heat treatment atmospheres |
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| KR20120067746A (en) * | 2010-12-16 | 2012-06-26 | 주식회사 포스코 | Device for supplying nitrogen gas of heat treatment furnace |
| WO2012124899A2 (en) * | 2011-03-16 | 2012-09-20 | Jeon Hae-Dong | Machine parts with excellent corrosion resistance and abrasion resistance, and manufacturing method thereof |
| CN103045838A (en) * | 2013-01-28 | 2013-04-17 | 曹玉贵 | Quenching-tempering rapid cooling equipment and technology of heat treatment production line of bimetal strip sawblade |
| CN202938300U (en) * | 2012-11-27 | 2013-05-15 | 谢哲斌 | Premixing type gas burner capable of sufficiently mixing gas |
| CN203021622U (en) * | 2013-01-28 | 2013-06-26 | 曹玉贵 | Quenching and tempering quick cooling equipment of bimetal strip saw blade heat treatment production line |
| CN203048996U (en) * | 2012-12-27 | 2013-07-10 | 日照海恩锯业有限公司 | Circular saw blade matrix gas type automated tempering treatment equipment |
| CN207313650U (en) * | 2017-10-26 | 2018-05-04 | 东阳市恒达金属波纹管有限公司 | A kind of nitrogen annulus annealing furnace |
| CN109554520A (en) * | 2019-01-23 | 2019-04-02 | 刘童童 | A kind of mesh-belt type hot air circulation annealing stove |
| CN210341005U (en) * | 2019-05-17 | 2020-04-17 | 张家港艺新金属材料有限公司 | Gas mixing and supplying device in saw blade tempering furnace |
-
2019
- 2019-05-17 CN CN201910414044.1A patent/CN110079657B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01184221A (en) * | 1988-01-14 | 1989-07-21 | Komatsu Ltd | Control device for atmosphere in fluidized bed furnace |
| JPH07198263A (en) * | 1993-01-13 | 1995-08-01 | Furukawa Electric Co Ltd:The | Nitrogen gas atmosphere heating device |
| US5441581A (en) * | 1994-06-06 | 1995-08-15 | Praxair Technology, Inc. | Process and apparatus for producing heat treatment atmospheres |
| WO1999011829A1 (en) * | 1997-09-04 | 1999-03-11 | Messer Griesheim Gmbh | Method and device for thermal treatment of parts |
| CN1939656A (en) * | 2005-09-30 | 2007-04-04 | 宝山钢铁股份有限公司 | Production of L80-13Cr oil casings |
| CN101054620A (en) * | 2007-05-18 | 2007-10-17 | 奉化市光亮热处理电炉有限公司 | Steel belt lead-bath quenching and backfire product line decarburization technique and device thereof |
| KR20120067746A (en) * | 2010-12-16 | 2012-06-26 | 주식회사 포스코 | Device for supplying nitrogen gas of heat treatment furnace |
| WO2012124899A2 (en) * | 2011-03-16 | 2012-09-20 | Jeon Hae-Dong | Machine parts with excellent corrosion resistance and abrasion resistance, and manufacturing method thereof |
| CN202938300U (en) * | 2012-11-27 | 2013-05-15 | 谢哲斌 | Premixing type gas burner capable of sufficiently mixing gas |
| CN203048996U (en) * | 2012-12-27 | 2013-07-10 | 日照海恩锯业有限公司 | Circular saw blade matrix gas type automated tempering treatment equipment |
| CN103045838A (en) * | 2013-01-28 | 2013-04-17 | 曹玉贵 | Quenching-tempering rapid cooling equipment and technology of heat treatment production line of bimetal strip sawblade |
| CN203021622U (en) * | 2013-01-28 | 2013-06-26 | 曹玉贵 | Quenching and tempering quick cooling equipment of bimetal strip saw blade heat treatment production line |
| CN207313650U (en) * | 2017-10-26 | 2018-05-04 | 东阳市恒达金属波纹管有限公司 | A kind of nitrogen annulus annealing furnace |
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| CN110079657A (en) | 2019-08-02 |
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Address after: 224200 Dongtaiyi new metal materials Co., Ltd. (within Dongtai Xuyuan Machinery Co., Ltd.) National entrepreneurship Park, Xuhe Town, Dongtai City, Yancheng City, Jiangsu Province Applicant after: Dongtaiyi new metal materials Co.,Ltd. Address before: 215636 Zhangjiagang Yixin Metal Material Co., Ltd., Daxin Town, Suzhou City, Jiangsu Province Applicant before: ZHANGJIAGANG YIXIN METAL MATERIAL Co.,Ltd. |
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