CN101655311A - Internally-heated lead vacuum heat treating furnace - Google Patents
Internally-heated lead vacuum heat treating furnace Download PDFInfo
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- CN101655311A CN101655311A CN200910187431A CN200910187431A CN101655311A CN 101655311 A CN101655311 A CN 101655311A CN 200910187431 A CN200910187431 A CN 200910187431A CN 200910187431 A CN200910187431 A CN 200910187431A CN 101655311 A CN101655311 A CN 101655311A
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Abstract
The invention discloses an internally-heated lead vacuum heat treating furnace, which is provided with a PLC automatic control system. The internally-heated lead vacuum heat treating furnace is characterized in that a main body of the vacuum heat treating furnace is provided with a vacuum system using an oil ring vacuum pump, a filter and an electric control system, wherein a heating chamber is arranged in a vacuum and airtight furnace shell, a plurality of heating rods are coaxially arranged along the periphery of the inner wall of the heating chamber, the furnace shell is provided with an introduction electrode, a gas circulating cooling blower and a heat exchanger are arranged between the heating chamber and the back end of the furnace shell body, two ends of the heating chamber are provided with ventilation ports, a lower corner of the right side of the heating chamber is provided with a graphite pipeline which is directly communicated with an evacuation pipeline of the vacuum system, the furnace shell is also provided with an inflation inlet and provided with an inflation electromagnetic valve, and protective gas is inflated into the furnace through the inflation inlet in needof inflation. The invention is specially designed for producing a graphite pencil lead, impurities in a processed material generate and release a large amount of volatile gas with the risen temperature, and the volatile gas is filtered and safely exhausted in time. The furnace has two work functions of vacuum and inflation at the same time, thereby reducing emission pollution, saving the energy source and improving the production efficiency.
Description
Technical field
The present invention relates to the application of manufacture field vacuum heat treatment equipment in pencil-lead is produced, a kind of heat treated vacuum heat treatment equipment of graphite pencil core that is used for.
Background technology
In the pencil-lead manufacture process, continue to use the external-heat tube furnace always and in protection gas, heat-treat.Particularly handle the material incipient stage when stove, along with temperature raises, the bigger escaping gas of impurity generation in the processed graphite material discharges, and the easy contaminated equipment of these gases must in time be discharged.This furnace capacity is little, and efficient is low, and power consumption is big, and emission is seriously polluted, and automaticity is low, work under bad environment, and because boiler tube is subjected to volatile matter corrosion and high-temperature oxydation, and equipment easily breaks down, product quality also is difficult for guaranteeing.
Summary of the invention
The purpose of this invention is to provide a kind of internally-heated lead vacuum heat treating furnace, aim at and produce the design of graphite pencil core, possess vacuum, two kinds of operation functions of inflation simultaneously, reduce pollution emissions, energy savings, enhance productivity.
Internally-heated lead vacuum heat treating furnace of the present invention, configuration PLC automatic control system is characterized in that the vacuum heat furnace main body disposes vacuum system, filter and the electric-control system that adopts oil ring vacuum pump; Dress heating clamber in the vacuum-tight furnace shell, around the heating clamber inwall, a plurality of heating rods are set axially, the introducing electrode is housed on the furnace shell, dress gas circulation cooling blower and heat exchanger between heating clamber and the furnace shell rear end, the heating clamber two ends are provided with ventilating opening, and heating clamber right side inferior horn is established graphite matter pipeline, directly communicate with the pipeline of finding time of vacuum system, also be provided with inflation inlet on the furnace shell, the inflation magnetic valve is installed, when needs are inflated, in stove, charge into protection gas by this mouth; PLC controls the pipeline of finding time that is communicated with heating clamber automatically, and the volatilization gas of generation in producing is sent into vacuum system, after the cooling of gas circulation accelerate cooling system, dust removal and filtration processing, by the pollution-free gas of the instant discharge of vavuum pump.
The key technical indexes of equipment:
Workspace: 500x500x900mm
Disposal ability, 200 boxes/stove.
Final vacuum: 600pa.
Operating temperature: 1050 degree
Control system, plc controls automatically, has full-automatic/manual function.
The present invention is directed to the characteristics of graphite pencil core material processing procedure, researched and developed the special-purpose internal heat type vacuum drying oven that suitable the sector is used, adopt vacuum heat mode, equipment to adopt novel evacuated unit, be provided with the heating clamber of being with the pipeline of finding time, design is fit to the cooling filter of technical process, configuration PLC automatic control system.By the special pipeline of finding time that is communicated with heating clamber, the volatilization gas that produces in the production enters vacuum system by heating clamber, after handling through the cooling of gas circulation accelerate cooling system, dust removal and filtration, by the pollution-free gas of the instant discharge of vavuum pump.
This stove of the present invention can realize that two kinds of technologies are optional, can adopt vacuum heat treatment process, also charges into the protection protective gas behind the vacuum-pumping.The heating clamber batch is big, and exhaust emission is few, energy savings, and automaticity improves, and improves working environment.Make pencil-lead manufacturing enterprise adopt vacuum heat treatment equipment and technology first.
Description of drawings
Fig. 1 is the axial cutaway view of vacuum heat treatment furnace of the present invention;
Fig. 2 is the radial cross-section of Fig. 1 vacuum heat treatment furnace;
Fig. 3 is the A portion pipeline enlarged drawing of finding time among Fig. 2;
Fig. 4 a is a vacuum system front view of the present invention;
Fig. 4 b is a vacuum system side view of the present invention;
Fig. 5 is a vacuum system middle filtrator structural representation;
Fig. 6 is the control program block diagram of this invention;
The specific embodiment
This internally-heated lead vacuum heat treating furnace, dispose complete vacuum system and PLC control system, it is characterized in that being made up of vacuum heat furnace main body, vacuum system, filter and electric-control system with oil ring vacuum pump, wherein control system is to work out specially according to the control needs of two kinds of operation techniques for the control program in the PLC commonly used.
Furnace shell 1 is cylindrical vacuum airtight container, see Fig. 1,2: axially parallel is provided with in ground, the cylinder front end face door of kicking off, it is characterized in that dress heating clamber 2 in the furnace shell, dress gas circulation cooling blower 5 and heat exchanger 4 between heating clamber and the furnace shell rear end, heating clamber 2 two ends are provided with ventilating opening 6, cooling but the time gas pass through.Heating clamber 2 right side inferior horns are established can resistant to elevated temperatures graphite matter pipeline 10, directly communicates with the pipeline of finding time, and sees enlarged drawing 3, is to improve the seal for pipe joints performance, at graphite matter pipeline 10 outer walls and vacuum lead interface increase sealing ring 13.Around heating clamber 2 inwalls, a plurality of heating rods 3 are set axially, are equipped with on the furnace shell and introduce electrode 7, electric energy is incorporated into makes the heating rod heating in the stove.Also be provided with inflation inlet 11 on the furnace shell, inflation magnetic valve 12 is installed, when needs are inflated, in stove, charge into protection gas by this mouth.
Setting up heat exchanger 4 and cooling blower 5, mainly is for accelerating cooling velocity, enhancing productivity.Cooling blower 5 is a centrifugal blower, and heat exchanger 4 is the copper fin heat exchange of heat pipe.Heat exchanger 4 is made circular mounting in the draught fan impeller outside, can reduce the length of furnace shell, and makes full use of space in the furnace shell.
The present invention adopts a kind of novel evacuated system 9, shown in Fig. 4 a, Fig. 4 b, oil ring formula vavuum pump 14 is connected to filter 8 by connecting line 17 with ELECTROMAGNETIC VACUUM valve 19, the outlet of vavuum pump 14 is connected to gs-oil separator 18,1 of vacuum system and furnace shell are equipped with filter 8, on the connecting leg between filter and the furnace shell, be provided with pressure sensor 15 and vacuum transducer 16, be used for measuring gas pressure and vacuum in the stove.
The internal structure of filter 8 such as Fig. 5 have absorption and filtering function, and the bottom is an oils adsorption liquid 20, and the middle part is for filtering silk screen 21, and exhaust outlet is also left on filter housings 22 tops, and exhaust outlet seals with valve 23.
The gas that enters filter is beaten on pasta, is fallen partial impurities by oil absorption, when gas upwards passes through to filter silk screen, by mechanical retardation, again most of contaminant filter is fallen.Oil ring formula vavuum pump contamination resistance, resistance to corrosion is all better, and vacuum also satisfies technological requirement.The exhaust outlet on filter top is one standby mouthful; when the volatilization gas of material is a lot; without vacuum processing technique; but take to fill in the stove processing mode of protecting gas; handle in the materials process, in stove, charge into inert protective gas, open exhaust outlet; the protection gas that carries impurity is discharged by exhaust outlet after filter filters.This moment, equipment had the function similar to tube furnace, but because be mode of heating in the stove, effective working space is big, and charge is more much bigger than tube furnace, and the gas of its discharging is through filtration treatment, and pollution greatly reduces.
The control system of stove is as Fig. 6: to switch control, the interlock protection of the pump of stove, valve and report to the police to handle and finished by the PLC programme-control.PLC reliability height, fast operation, programming is convenient, satisfies the routine work of stove.Special-purpose temperature control instrument able to programme is adopted in temperature control, power controller, thermocouple reach the information of the vacuum sensor that transmits by no paper record, and are used to set many temperature-time curves, and every curve can be set a plurality of temperature sections, instrument measurement precision height adopts expert PID control.Instrument is accepted the Thermocouple Temperature Signal of stove feedback, with set temperature value relatively after, through the PID computing, the outputting standard signal is to thyristor voltage regulator, thus the heating power of continuous control stove.The record of temperature and vacuum historical information adopts the recording instrument without paper of high reliability, this recorder can be imported the multiple standards process signal, measuring period 125msec, adopt high-resolution 5 inches STN monochromatic liquid crystal displays, have multiple display modes such as curve, rod figure, numeral, overview, history curve.But its high-capacity FLASH memory long preservation data, data also can dump to outside CF card.
Claims (4)
1, internally-heated lead vacuum heat treating furnace, configuration PLC automatic control system and vacuum system is characterized in that the vacuum heat furnace main body disposes vacuum system, filter and the electric-control system that adopts oil ring vacuum pump; Dress heating clamber (2) in the vacuum-tight furnace shell (1); around heating clamber (2) inwall, a plurality of heating rods (3) are set axially; be equipped with on the furnace shell and introduce electrode (7); dress gas circulation cooling blower (5) and heat exchanger (4) between heating clamber and the furnace shell rear end; heating clamber (2) two ends are provided with ventilating opening (6); heating clamber (2) right side inferior horn is established can resistant to elevated temperatures graphite matter pipeline (10); directly communicate with the pipeline of finding time; also be provided with inflation inlet (11) on the furnace shell; inflation magnetic valve (12) is installed, when needs are inflated, in stove, is charged into protection gas by this mouth.
2, internally-heated lead vacuum heat treating furnace according to claim 1, it is characterized in that cooling blower (5) is a centrifugal blower, heat exchanger (4) is the copper fin heat exchange of heat pipe, heat exchanger (4) is made circular mounting in the draught fan impeller outside, reducing the length of furnace shell, and make full use of space in the furnace shell.
3, internally-heated lead vacuum heat treating furnace according to claim 1, it is characterized in that being equipped with between vacuum system and furnace shell (1) filter (8), oil ring formula vavuum pump (14) is connected to filter (8) by connecting line (17) with ELECTROMAGNETIC VACUUM valve (19), the outlet of vavuum pump (14) is connected to gs-oil separator (18), on the connecting leg between filter and the furnace shell, be provided with pressure sensor (15) and vacuum transducer (16), be used for measuring gas pressure and vacuum in the stove.
4, internally-heated lead vacuum heat treating furnace according to claim 1, it is characterized in that having absorption and filtering function filter (8) bottom and be oils adsorption liquid (20), the middle part is for filtering silk screen (21), exhaust outlet is also left on filter housings (22) top, and exhaust outlet seals with valve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187431A CN101655311A (en) | 2009-09-18 | 2009-09-18 | Internally-heated lead vacuum heat treating furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910187431A CN101655311A (en) | 2009-09-18 | 2009-09-18 | Internally-heated lead vacuum heat treating furnace |
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| CN101655311A true CN101655311A (en) | 2010-02-24 |
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| CN200910187431A Pending CN101655311A (en) | 2009-09-18 | 2009-09-18 | Internally-heated lead vacuum heat treating furnace |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881556A (en) * | 2010-07-09 | 2010-11-10 | 沈阳恒进真空科技有限公司 | Multi-working area large-capacity energy saving vacuum sintering furnace |
| CN101893383A (en) * | 2010-07-23 | 2010-11-24 | 上海联川自动化科技有限公司 | Method and device for vacuumizing and filling inert gases in industrial furnace |
| CN102206809A (en) * | 2010-03-30 | 2011-10-05 | 杭州海鲸光电科技有限公司 | High temperature vacuum baking furnace and operation method thereof |
| CN103331447A (en) * | 2013-06-14 | 2013-10-02 | 蓝山县金山川粉末冶金有限公司 | Gel discharging and degreasing technology and equipment for powder metallurgical vacuum sintering furnace |
| CN104154749A (en) * | 2013-05-15 | 2014-11-19 | 苏州先端稀有金属有限公司 | Vertical type vacuum-atmosphere high-temperature furnace |
| CN105618884A (en) * | 2016-02-26 | 2016-06-01 | 沈阳广泰真空科技有限公司 | Horizontal type vacuum furnace for diamond particle brazing |
| CN107436088A (en) * | 2017-08-16 | 2017-12-05 | 苏州楚翰真空科技有限公司 | A kind of horizontal-type high temperature vacuum experiment stove |
| CN110425880A (en) * | 2019-08-19 | 2019-11-08 | 合肥真萍电子科技有限公司 | A kind of vacuum baking tray furnace |
| CN112725763A (en) * | 2020-12-24 | 2021-04-30 | 张家港迪源电子科技有限公司 | High-temperature chemical vapor deposition system and equipment |
| CN113512636A (en) * | 2021-05-24 | 2021-10-19 | 江苏爱科斯真空科技有限公司 | Vertical vacuum heat treatment furnace |
-
2009
- 2009-09-18 CN CN200910187431A patent/CN101655311A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206809A (en) * | 2010-03-30 | 2011-10-05 | 杭州海鲸光电科技有限公司 | High temperature vacuum baking furnace and operation method thereof |
| CN101881556A (en) * | 2010-07-09 | 2010-11-10 | 沈阳恒进真空科技有限公司 | Multi-working area large-capacity energy saving vacuum sintering furnace |
| CN101893383A (en) * | 2010-07-23 | 2010-11-24 | 上海联川自动化科技有限公司 | Method and device for vacuumizing and filling inert gases in industrial furnace |
| CN101893383B (en) * | 2010-07-23 | 2012-07-04 | 上海联川自动化科技有限公司 | Method and device for vacuumizing and filling inert gases in industrial furnace |
| CN104154749A (en) * | 2013-05-15 | 2014-11-19 | 苏州先端稀有金属有限公司 | Vertical type vacuum-atmosphere high-temperature furnace |
| CN103331447A (en) * | 2013-06-14 | 2013-10-02 | 蓝山县金山川粉末冶金有限公司 | Gel discharging and degreasing technology and equipment for powder metallurgical vacuum sintering furnace |
| CN105618884A (en) * | 2016-02-26 | 2016-06-01 | 沈阳广泰真空科技有限公司 | Horizontal type vacuum furnace for diamond particle brazing |
| CN107436088A (en) * | 2017-08-16 | 2017-12-05 | 苏州楚翰真空科技有限公司 | A kind of horizontal-type high temperature vacuum experiment stove |
| CN110425880A (en) * | 2019-08-19 | 2019-11-08 | 合肥真萍电子科技有限公司 | A kind of vacuum baking tray furnace |
| CN112725763A (en) * | 2020-12-24 | 2021-04-30 | 张家港迪源电子科技有限公司 | High-temperature chemical vapor deposition system and equipment |
| CN113512636A (en) * | 2021-05-24 | 2021-10-19 | 江苏爱科斯真空科技有限公司 | Vertical vacuum heat treatment furnace |
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Open date: 20100224 |