CN209085317U - Nitriding furnace inner roof brick closing device - Google Patents
Nitriding furnace inner roof brick closing device Download PDFInfo
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- CN209085317U CN209085317U CN201821297759.0U CN201821297759U CN209085317U CN 209085317 U CN209085317 U CN 209085317U CN 201821297759 U CN201821297759 U CN 201821297759U CN 209085317 U CN209085317 U CN 209085317U
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Abstract
The purpose of the utility model is to provide a kind of nitriding furnace inner roof brick closing device of sealing folding bell, at least one reaction unit is arranged in the furnace body including sealing, furnace interior；Reaction unit includes the heat insulation furnace cover for keeping the temperature burner hearth, moving up and down；Heat insulation furnace cover connects hoisting mechanism, and the hoisting mechanism other end is pierced by furnace body by the through-hole on furnace wall, sealing mechanism is arranged between hoisting mechanism and furnace body.Hoisting mechanism is cylinder, and the piston rod of cylinder, which by through-hole enters furnace body and is connected with heat insulation furnace cover, moves up and down heat insulation furnace cover, is sealed between piston rod and through-hole.Keeping the temperature burner hearth and heat insulation furnace cover has insulation effect, but it is difficult to radiate, hoisting mechanism and sealing mechanism can realize better radiating and cooling by opening bell after completion of the reaction, and furnace interior gas and extraneous gas will not exchange during opening bell, ensure that heat dissipation effect and product quality.
Description
Technical field
The utility model belongs to nitrogen combustion and Metal Production nitride devices field, and in particular to nitriding furnace inner roof brick is opened
It attaches together and sets.
Background technique
Metal nitride application field is more and more extensive at present, and metal nitride is because its performance is active, good physical properties
The features such as attract attention.But its Nitriding Technology is really very difficult, major way is that metal is placed under nitrogen environment at present,
Being heated to high temperature reflects metal sufficiently with nitrogen.The primary structure sample of the reacting furnace of production nitride i.e. nitriding furnace at present
There are two types of formulas, a kind of tube furnace, a kind of shaft furnace.Using external heating mode, entire furnace cavity is heated, heating process
Slowly, cooling is also by the way of the cooling of outside, and the speed of cooling is slower, low efficiency.And both stove furnace cavities
Limited, each production capacity is lower.And it discharges heat because space is small, in nitride metal reaction process to concentrate, furnace pressure rises
Comparatively fast, production security is poor.Nitride metal reaction especially for vigorous combustion and discharges the active metal of amount of heat, right
Its nitridation is especially taken care, and needs safe and reliable equipment that could complete, and is monitored reaction temperature in real time in the process and is controlled nitrogen
Throughput guarantees nitridation process safety.
In addition, metal burning needs certain temperature, and temperature requirement is uniform, in order to enable metallic perimeter environment temperature reaches
To ignition temperature and uniformly, it is necessary to carry out burner hearth heat preservation, protection materials are thicker, and it is fewer to distribute temperature in furnace, more uniform temperature.
But heat preservation is carried out, cooling is again problem.Nitride metal reacts nitridation process also with regard to 1 hour or so completely, but cools down
Journey wants 8-10 hours time-consuming, greatly reduces production efficiency.But temperature-fall period again cannot completely by oven door opening, under high temperature,
Nitrided metal encounters air meeting vigorous reaction and aoxidizes, it is necessary to which 100 degree or less could open fire door.Therefore previous traditional nitrogen
Changing furnace cannot achieve the unification of thermal insulation property and cooling rate.
There are also reasons to be that bell can not considerably beyond running time for nitriding furnace temperature fall time under vacuum conditions
It opens, can only be cooled down by furnace wall.Most of at present use does water cooled pipeline on furnace wall, and the heat distributed inside burner hearth is encountered cold
Behind furnace wall, furnace wall is transferred heat to, the temperature of furnace wall is taken away by water cooled pipeline, but this process is still very slow, because of furnace body
Internal heat all concentrates in heating furnace, and burner hearth has good thermal insulation material to surround, and heat distributes slowly, therefore the method is still
In-furnace temperature cannot be reduced quickly.It needs for a long time, temperature could reduce, and place inevitably can make object into air for a long time
Material oxidation, influences purity.Accelerate cooling rate, it is most important to improve production efficiency.One kind is needed to be adapted to nitrogen under vacuum condition
Change the cooling method of furnace.
Summary of the invention
The purpose of the utility model is to provide a kind of nitriding furnace inner roof brick closing devices of sealing folding bell.
The purpose of this utility model is achieved in that nitriding furnace inner roof brick closing device, the furnace including sealing
At least one reaction unit is arranged in body, furnace interior；Reaction unit includes the heat insulation furnace cover for keeping the temperature burner hearth, moving up and down；Heat preservation
Bell connects hoisting mechanism, and the hoisting mechanism other end is pierced by furnace body by the through-hole on furnace wall, sets between hoisting mechanism and furnace body
Set sealing mechanism.
Hoisting mechanism is cylinder, and the piston rod of cylinder by through-hole enters furnace body and is connected with heat insulation furnace cover and makes on heat insulation furnace cover
Lower movement, seals between piston rod and through-hole.
Sealing mechanism outer wall and through-hole weld, inside sealing mechanism setting by the sealing hole of piston rod, sealing mechanism from
Under to above setting gradually Y type sealing flange, y-type seal ring, O-shaped sealing flange, O-ring seal, O-ring seal, O-shaped Sealing Method
Orchid, y-type seal ring, Y type sealing flange.
The beneficial effects of the utility model are: the utility model does not heat entire furnace body, but in bigger furnace body
The reaction unit that relatively small heat preservation burner hearth and insulation cover and resistive heater composition is arranged in inside to METAL HEATING PROCESS and is kept the temperature.
On the one hand: directly heating metal, consuming energy, smaller, heating speed is fast；Black furnace body requires to reduce, heats function to furnace tube material
Rate reduces very much, and stove cost is greatly reduced.Second: furnace body is easy to do greatly, and pressure rises slowly in furnace body when reacting violent, has
Enough time controls nitrogen flow.The safety is improved.Third: the multiple reaction units of setting in a furnace body are equivalent to multiple furnaces
Sub- simultaneous reactions, greatly improve production efficiency.4th；Nitrogen makes full use of, and reduces the consumption of nitrogen.
Keeping the temperature burner hearth and heat insulation furnace cover has insulation effect, but is difficult to radiate, and hoisting mechanism and sealing mechanism can be
Better radiating and cooling is realized by opening bell after the reaction was completed, and opens furnace interior gas and outside during bell
Gas will not exchange, and ensure that heat dissipation effect and product quality.
Detailed description of the invention
Fig. 1 is reactive multilayer device nitriding furnace.
Fig. 2 is burner hearth schematic diagram.
Fig. 3 furnace body outline drawing.
Fig. 4 is nitriding furnace cooling-cycle device embodiment 1.
Fig. 5 is nitriding furnace cooling-cycle device embodiment 2.
Fig. 6 is nitriding furnace cooling-cycle device embodiment 3.
Fig. 7 is heat insulation furnace cover and circulating line top view.
Fig. 8 is nitriding furnace cooling-cycle device embodiment 4.
Fig. 9 is bell closing device embodiment 1. inside nitriding furnace
Figure 10 is sealing mechanism enlarged drawing in Fig. 9.
Figure 11 is bell closing device embodiment 2. inside nitriding furnace
Figure 12 is the reacting furnace embodiment for producing nitride.
1 it is wherein furnace body, 2 be fire door, 3 be cooling water channel, 4 be reaction unit, 41 be heat preservation burner hearth, 42 is holding furnace
Lid, 43 be resistive heater, 44 be charging tray, 45 be thermocouple, 46 be electrode, 5 be nitrogen charging port, 6 be vacuum orifice, 7 be pressure
Power table, 8 be mechanical pressure release valve, 9 be electronic control pressure release valve, 10 be burner hearth bracket, 11 be sealing mechanism, 110 be sealing hole, and 111 be Y
Type sealing flange, 112 be y-type seal ring, 113 be O-shaped sealing flange, 114 be O-ring seal, 115 be nylon washer, 116 be
Rubber ring, 12 be cylinder, 13 be piston rod, 14 be wirerope, 15 be hoist engine, 16 be hanging ring, 17 be directive wheel, 18 be circulation
Pipeline, 19 be blower, 20 be water-cooled baffle, 21 be water cooled pipeline, 22 be entrance, 23 be branch's circulating line, 24 be valve
Door, 25 are side openings.
Specific embodiment
As shown in figs. 1-12, the reacting furnace of nitride is produced, there are many embodiments.
As shown in Figure 1-3, at least one layer of reaction dress is arranged inside reactive multilayer device nitriding furnace, including furnace body 1, furnace body 1
Set 4.Reaction unit 4 includes attemperator, heating device and charging tray 44, and heating device and the setting of charging tray 44 are surrounded in attemperator
Space inside.Cooling device is set on furnace body 1, and fire door 2 is arranged in 1 front end of furnace body；It is provided with nitrogen charging port 5 on furnace body 1, fills
Nitrogen mouth 5 connects air charging system by charge valve.Vacuum orifice 6 is provided on furnace body 1, setting one end is connected to furnace on furnace body 1
Pressure gauge 7 inside body 1, pressure gauge 7 are electrically connected controller control charge valve and open or close.Temperature sensing is set in furnace body 1
Device, temperature sensor and heating device are electrically connected controller.
The utility model includes vacuum system, and vacuum system includes vacuum pump and vacuum pipe and vacuum meter.Furnace body 1
After being put into metal charge in reaction unit 4, it is necessary first to be vacuumized to furnace body 1.Vacuum orifice 6 connects vacuum pipe by extraction valve
And air extractor.After vacuumizing, need through nitrogen to scheduled pressure.Pressure gauge 7 on furnace body 1 can be electric contact pressure
Table.Electro connecting pressure gauge has upper and lower bound value, and when gauge hand reaches the upper limit in gas replenishment process, electro connecting pressure gauge is issued
Signal, solenoid valve, that is, charge valve are closed, and inflation is stopped, when nitrogen consumption furnace interior pressure descends below lower limit value, inflation
Valve is opened, and nitrogen is poured in furnace automatically, and nitrogen is closed when reaching upper limit value and inflates gas circuit.Temperature sensor believes temperature
It number is transmitted to controller, controller controls heating device and adjusts temperature.These all pass through circuit control by controller.
Cooling device is the cooling water channel 3 of 1 outer surface of furnace body welding.Furnace body 1 is cylindrical, divides shaft, upper bell, lower furnace
Lid, fire door 2 are all to be welded using carbon steel or heat-resistance stainless steel, and cooling water channel 3 has all been welded on its surface, to reduce
1 surface temperature of furnace body.This mode, furnace body 1 is relatively simple for structure, can be the furnace body of one-stor(e)y furnace wall construction.Either manufacture
Furnace body 1 or installation cooling water channel are all more convenient and at low cost.Certainly, furnace body 1 can also be divided into outside furnace interior and furnace body
Wall, cooling device can be the circulation water passage being arranged between furnace interior and furnace body outer wall, circulating water channel water inlet at this time
The lower end of side furnace body outer wall, the upper end of the oppositely disposed furnace body outer wall of circulating water channel water outlet is arranged in mouth.
Attemperator is heat preservation burner hearth 41 and heat insulation furnace cover 42 made of thermal insulation material；Heating device is resistive heater
43, the setting of resistive heater 43 is inside heat preservation burner hearth 41.Burner hearth bracket 10 is set in furnace body 1, and heat preservation burner hearth 41 is arranged in furnace
On thorax bracket 10.Keeping the temperature burner hearth 41 is cake type, is made of flame-proof thermal insulation material, and resistive heater 43, adding thermal resistance are embedded
Silk 43 is distributed in heat preservation 41 bottom of burner hearth and surrounding.Heat insulation furnace cover 42 is also to be made of thermal insulation material, is solid cake, holding furnace
Lid 42 and the heat preservation high temperature resistant hinge connection of burner hearth 41, are easy to open and take material.43 connection electrode 46 of resistive heater, furnace wall
Electrode terminal is installed in upper aperture, and electrode terminal and container insulate, in order to avoid furnace wall is charged when heating, is connected outside electrode terminal
Connect external power supply, connection electrode inside electrode terminal.
Expect the setting of 44 disks inside heat preservation burner hearth 41, be located at the inside of resistive heater 43, charging tray 44 and heat preservation burner hearth 41 it
Between be arranged thermocouple 45, thermocouple 45 be electrically connected temperature controller.Thermocouple 45 is also equipped with the aperture on corresponding circuit and furnace wall.
Thermocouple 45 is a kind of temperature sensor, and temperature signal can be passed to temperature controller, and temperature controller is also a kind of control
Device processed.Temperature controller controls heater circuit.When the temperature is excessively high, signal is issued temperature controller, temperature controller control heating by temperature sensor
Device stops heating.When temperature is low, temperature controller control heating device begins to warm up or increases heating speed.Nitriding temperature control
It is controlled by automatic temperature control instrument, process curve can be set as needed.
Mechanical pressure release valve 8 is set on furnace body 1 and is electrically connected the electronic control pressure release valve 9 of pressure gauge 7.Mechanical pressure release valve 8 and automatically controlled
Relief valve 9 is the pressure protective system of furnace body 1, and mechanical pressure release valve 8 is when 1 internal pressure of furnace body reaches certain value, and machinery is let out
Pressure valve 8 automatically opens deflation, maintains furnace interior pressure balance；Electronic control pressure release valve 9 is by electro connecting pressure gauge and electromagnetic valve group
At electro connecting pressure gauge has upper and lower bound value, and when furnace interior pressure reaches certain pressure, this pressure is less than mechanical pressure release
8 vent pressure of valve, electro connecting pressure gauge issue signal, and electronic control pressure release valve 9, which is opened, comes pressure release, the closing when pressure drops to certain value
Electric control solenoid valve stops pressure release.Manual air-release valves can also be set on furnace body.
As shown in figs. 9-11, during heating and reaction, heat insulation furnace cover 42 and heat preservation burner hearth 41 can play heat preservation
Effect.But thermal insulation material heat dissipation is slow, keeps the temperature and is not provided with water-cooling mechanism on burner hearth 41, only the cooling on furnace body
Water route 3 still needs many times.Therefore setting bell opens and closes dress in the reactive multilayer device nitriding furnace that can be generally noted above
It sets, closes bell in nitridation reaction, after nitridation reaction, open heat insulation furnace cover heat dissipation, the heat kept the temperature in burner hearth can lead to
It crosses heat in furnace and passes to furnace wall, heat is shed by furnace wall, cooling that can be more convenient.And in the process of blow-on lid
In, furnace sealing state is kept, so that outside air is not entered furnace body, influences the quality of product.
As shown in figs. 9-10, setting heat preservation burner hearth 41, heat insulation furnace cover 42 cover on burner hearth in closed furnace body 1.Holding furnace
Lid 42 connects hoisting mechanism, and the hoisting mechanism other end is pierced by furnace body 1 by the through-hole on furnace wall, between hoisting mechanism and furnace body 1
Sealing mechanism 11 is set.Hoisting mechanism can be cylinder 12, and the piston rod 13 of cylinder 12 enters furnace body 1 and holding furnace by through-hole
Lid 42, which is connected, moves up and down heat insulation furnace cover 42, and sealing mechanism 11 is arranged between piston rod 13 and through-hole.Cylinder 12 passes through bracket
It is fixed on 1 top of furnace body, installation two close switches in 12 main body of cylinder, two are exactly that cylinder limits up and down close to the position of the switch
It sets, when cylinder rises to the upper limit close to when switching, close switch issues signal, closes compressed air, and gas is worked as in cylinder stopping rising
When the lower limit of cylinder decline is close to the position of the switch, signal is issued close to switch, closes compressed air, cylinder stops decline.Air valve by
Magnet control receives outer signals and opens and closes gas circuit.
11 outer wall of sealing mechanism and through-hole weld, and setting passes through the sealing hole 110 of piston rod, sealing inside sealing mechanism 11
Mechanism 11 sets gradually Y type sealing flange 111, y-type seal ring 112, O-shaped sealing flange 113, O-ring seal from top to bottom
114, O-ring seal 114, O-shaped sealing flange 113, y-type seal ring 112, Y type sealing flange 111.It is y-type seal ring 112, O-shaped
Nylon washer 115 can also be set between sealing flange 113, can also be set between O-shaped sealing flange 113, O-ring seal 114
Set rubber ring 116.Also there is the component of similar washer etc to separate each other between 2 O-ring seals 114.It is protected by four-layer seal
Furnace body gas is not in communication with the outside in card 13 motion process of piston rod.When multiple reaction units 4 are set in furnace body, multiple holding furnaces
It can be connected between lid 42, can lift or put down simultaneously all heat insulation furnace covers with same set of lifting device in this way.This reality
It can be used for vacuum drying oven or atmosphere furnace with novel bell closing device.
As shown in figure 11, for the heat insulation furnace cover 42 with heat preservation burner hearth 41 by high temperature resistant hinge connection, because of holding furnace
Lid 42 is rotation folding, is directly connected to the piston head of cylinder obviously not all right.Wirerope 14 can be used as lifting device.It protects
Warm 42 connecting steel wire ropes 14 of bell, wirerope 14 are driven by the hoist engine 15 outside furnace body 1 is arranged in.Wirerope 14 passes through furnace body
The through-hole of 1 furnace wall and the setting sealing mechanism 11 between furnace wall.Sealing mechanism 11 can be the sealing mechanism in Figure 10, different
Place is that the diameter of wirerope 14 is different from 13 diameter of piston rod.Hanging ring 16, wirerope 14 can be set on heat insulation furnace cover 42
One end is arranged in hanging ring 16.Directive wheel 17 is respectively set in furnace body 1 and outside furnace body 2 makes wirerope between two directive wheels 17
14 is vertical.It avoids in 42 opening process of heat insulation furnace cover, rub the damage that becomes larger between 14 angle tilt of wirerope and sealing mechanism 11
Wirerope 14.
As shown in Figure 4-8, METAL HEATING PROCESS and reaction carry out in attemperator, are easy to reach scheduled reaction temperature in this way
Degree saves the energy.But when needing to radiate, thermal insulation material does not allow easy heat radiation but, and the cooling water channel by the external welding of furnace body furnace wall comes
Cooling entire furnace body includes needing for a long time to can be only achieved the temperature that can open fire door inside attemperator.Open heat insulation furnace cover 42
Accelerating heat dissipation is a kind of method, and can also improve on cooling device is quickly cooled down nitriding furnace.
Nitriding furnace is quickly cooled down circulator, the furnace body 1 including sealing；Cooling device, furnace body 1 are set on 1 furnace wall of furnace body
At least one reaction unit 4 is arranged in inside；Reaction unit 4 includes attemperator, heating device and charging tray 44, heating device and material
Disk 44 is arranged in inside the space that attemperator surrounds.On the outside of furnace body 1 be arranged circulating line 18,18 both ends of circulating line respectively with
Furnace body 1 is connected to, and blower 19 is respectively set in 18 inside both ends of circulating line, and blower 19 is in the circulating line 18 of 1 side of furnace body
Water-cooled baffle 20 is set.
The circulating line 18 of setting connection furnace interior outside furnace body 1, flows gas in furnace body 1 by blower 19,
Cooled down faster more evenly by flowing.Above and below 1 side of furnace body then two holes Ge Kai, aperture 100-200mm use respective diameters
Circulating line 18 in 1 external connection of furnace body, two holes so that forming the circulation line of sealing inside circulating line 18 and furnace body 1
18.18 material of circulating line is consistent with 1 material of furnace body, firm welding, no-welding-seam.18 diameter 100-200mm of circulating line, but not
It is limited to this size；18 wall thickness 3-10mm of circulating line.Blower 19 nearby close to 1 position of furnace body, is equipped on circulating line 18
Water-cooled baffle 20 in advance cools down to hot gas, prevents motor direct contact heat air and damage.20 structure of water-cooled baffle is multiple
U-tube structure, this unlimited structure can sufficiently extend length of pipe as long as the mode that can increase contact area is ok, and increase
Add the contact area with hot-air.20 intake-outlet of water-cooled baffle passes through circulating line 18, is connected with outer water tube, outlet conduit
With the abundant firm welding of circulating line infall, gas leakage is avoided.Various holes are arranged on circulating line 18 passes through electric wire etc., blower
It is electrically connected controller.Blower motor is connected by enclosed electrode with outside line, and enclosed electrode is installed on circulating line, is guaranteed
It is air tight.
Water cooled pipeline 21 is arranged in 18 outer surface of circulating line.Water cooled pipeline 21 can be wrapped in circulating line for helical pipe
18 outer surfaces, helical pipe the inside leads to cold water and cools down to circulating line 18, to reduce the temperature of 18 internal gas of circulating line.
Water cooled pipeline 21 diameter 15-25mm, wall thickness 1-3mm.Size without being limited thereto according to actual needs.Two blowers 19 1 are by furnace body
Hot gas extraction inside 1, gas after cooling is blown by another, the gas flowing in furnace body 1, so that temperature in furnace is fast
Speed reduces.Circulating line 18 and furnace body 1 self-contained, one entirety avoid outside air entrance.Water cooled pipeline 21 makes circulating line
18 coolings, 1 inside hot gas of furnace body are entering in furnace body 1 after the cooling of circulating line 18, to reduce by 1 inside temperature of furnace body
Degree.Reduce temperature fall time, material oxidization time section, purity is higher.Cooling rate quickly, shortens the production time, improves effect
Rate.
As illustrated in figures 4-5, for moving up and down the heat insulation furnace cover 42 of folding in heat preservation 41 top position of burner hearth；Heat insulation furnace cover
Entrance 22 is set on 42, and the entrance 22 that one end of circulating line 18 extends through heat insulation furnace cover 42 enters heat preservation burner hearth
Inside 41.Temperature is highest in heat preservation burner hearth 41, and 18 one end of circulating line is passed through inside, then can exchange this portion faster
The heat divided promotes cooling.Preferably, the circulating line 18 that cold air is blown into end enters inside heat preservation burner hearth 41.Heat insulation furnace cover
42 can move up and down folding, and circulating line 18 will not influence charging and discharging.The shape and circulating line of entrance 22
18 cooperations.It is not to be fully sealed between heat preservation burner hearth 41 and heat insulation furnace cover 42, so entrance 22 and circulating line 18
Between gap product quality will not be impacted.At least two reaction units 4 of setting in furnace body, circulating line 18 extends
It is protruded into inside the heat preservation burner hearth 41 of each reaction unit 4 into one end of burner hearth setting branch's circulating line 23.Circulating line 18
Valve 24 can be set in both ends.Valve 24 controls whether furnace body 1 circulates with gas in circulating line 18.Cooling device is furnace body 1
The cooling water channel 3 of outer surface welding.Heat preservation 41 portion temperature of burner hearth in this way is relatively high, is on the one hand cooled down by circulating line 18,
Another aspect temperature is cooled down to spreading inside furnace body 1 by the cooling water channel 3 of 1 outer surface of furnace body, cooling rate faster, and
More evenly.
There is the furnace body 1 of multiple reaction units 4, for circulating line 18 it is also possible that setting, 18 one end of circulating line enters furnace
Body 1 extends into a part heat preservation burner hearth 41, and 18 other end of circulating line also enters furnace body 1 and extends into remaining heat preservation burner hearth
41。
As shown in figs 6-8, for the heat insulation furnace cover 42 with heat preservation burner hearth 41 by high temperature resistant hinge connection, 1 outside of furnace body
Circulating line 18 is set, and 18 both ends of circulating line are connected to furnace body 1 respectively, and blower is respectively set in 18 inside both ends of circulating line
19, water-cooled baffle 20 is arranged in blower 19 in the circulating line 18 of 1 side of furnace body.Pair of high temperature resistant hinge on heat insulation furnace cover 42
Side openings 25 are arranged in side, and one end of circulating line 18 extends into furnace body 1 and entered by the side openings 18 of heat insulation furnace cover
It keeps the temperature inside burner hearth 41.Side openings 25 are not the holes in heat insulation furnace cover 42, as the heat insulation furnace cover 42 opened and closed up and down.Side
It is to guarantee that heat insulation furnace cover 42 can be rotated along high temperature resistant hinge that opening 25, which is located at the positive opposite side of high temperature resistant hinge and is not closed,
Folding, not will receive the obstruction of branch's circulating line.The shape of side openings 25 can for half of oval or hemicycle or
Hemicycle lengthens rectangular etc..Remaining moves up and down the identical of folding with heat insulation furnace cover.
As shown in figure 12, a kind of reacting furnace producing nitride, in order to preferably cool down, improve security performance and efficiency,
It is provided with bell closing device on reactive multilayer device nitriding furnace and is quickly cooled down circulating line 18.It is heated when reacting in this way
Rapidly, good heat insulating, nitridation furnace pressure variation are small, securely and reliably；When cooling, heat insulation furnace cover 42 is opened and circulating line
Wind after cooling is blown into heat preservation burner hearth 41, rapid heat dissipation, high production efficiency by 18.It specifically can be with the base of reactive multilayer device nitriding furnace
The elevator of the bell closing device of mistake disclosed above is selected on plinth according to the open-close ways of heat insulation furnace cover 42 and heat preservation burner hearth 41
The cooling cycle mode that structure and sealing mechanism 11, selection circulating line 18 are suitble to.
Heat insulation furnace cover 42 connects hoisting mechanism, and the hoisting mechanism other end is pierced by furnace body 1, elevator by the through-hole on furnace wall
Sealing mechanism 11 is set between structure and furnace body；On the outside of furnace body 1 be arranged circulating line 18,18 both ends of circulating line respectively with furnace body 1
Blower 19 is respectively set in connection, 18 inside both ends of circulating line, and water is arranged in the circulating line 18 of 1 side of furnace body in blower 19
Cold apron 21；Entrance 22 is set on heat insulation furnace cover 42, and one end of circulating line 18 extends through the pipeline of heat insulation furnace cover 42
Entrance 22 enters inside 41 thorax of holding furnace.Water cooled pipeline 21 is arranged in 18 outer surface of circulating line；Cooling device is furnace body outer surface
The cooling water channel 3 of welding.
Heat insulation furnace cover 42 moves up and down on heat preservation burner hearth 41；Hoisting mechanism is cylinder 12, and the piston rod 13 of cylinder 12 is logical
Crossing through-hole and entering furnace body 1 and be connected with heat insulation furnace cover 42 moves up and down heat insulation furnace cover 42, is arranged between piston rod 13 and through-hole close
Sealing mechanism 11.The structure of sealing device 11 has above.
When heat insulation furnace cover 42 and heat preservation burner hearth 41 pass through high temperature resistant hinge connection；42 connecting steel wire ropes 14 of heat insulation furnace cover, steel
Cord 14 is driven by the hoist engine 15 outside furnace body 1 is arranged in；Wirerope 14 pass through furnace body 1 furnace wall through-hole and with furnace wall 1
Between sealing mechanism 11 is set, remaining details has been disclosed above.
In furnace body 1 when at least two reaction unit 4 of setting, circulating line 18 extends into one end setting of heat preservation burner hearth 41
Branch's circulating line 23 protrudes into inside the heat preservation burner hearth 41 of each reaction unit 4.
When specific implementation: the utility model changes previous design, takes interior heating method, and the setting of reactive multilayer device 4 exists
Inside 1 body of furnace.Furnace body 1 can bear certain positive pressure.Firstly, opening fire door 2, metal is put into charging tray 44, closed furnace body 1 is right
Furnace body 1 is vacuumized, and after vacuum is less than 10Pa, is passed through nitrogen to 1 atmospheric pressure, electrified regulation keeps the temperature the heating in burner hearth 41
Resistance wire 43, when metal temperature reaches nitriding temperature, metal starts to burn, and discharges heat, and the heat of release is enough to mention
Energy needed for being reacted for subsequent metal, therefore power supply is disconnected at this time, the energy can be saved.Nitrogen in reaction process is because of consumption meeting
It reduces, by electro connecting pressure gauge 7 come nitrogen pressure inside adjustment container, nitrogen pressure upper limit 0.12Mpa, lower limit 0.09Mpa,
When nitrogen consumption makes container internal pressure lower than 0.09Mpa, electro connecting pressure gauge senses pressure, issues signal, opens nitrogen
Gas charge valve, nitrogen is automatically toward filling inside container, and when pressure reaches 0.12Mpa, electro connecting pressure gauge issues signal, closes
Nitrogen charge valve.Nitriding temperature control is controlled by automatic temperature control instrument, and process curve can be set as needed.It controls in furnace body 1
Pressure adjusts nitrogen flow, and when furnace interior pressure is constant, nitridation is completed.
Reaction is completed in temperature-fall period, drives heat insulation furnace cover 42 to open by wirerope 14 or cylinder 12, and open
The valve 24 of circulating line 18 opens blower 19 and water cooled pipeline 21, after gas is pumped to the cooling of circulating line 18 out of furnace body 1
Cold air, which returns in heat preservation burner hearth 41, cools down to it, while cooling water channel 3 reduces the temperature of gas in furnace body 1.Temperature is to room temperature
After open fire door, take out material.
The utility model does not heat entire furnace body, but relatively small heat preservation burner hearth is arranged in bigger furnace interior
The reaction unit formed with insulation cover and resistive heater to METAL HEATING PROCESS and is kept the temperature.On the one hand: directly heating metal, consume energy
It is smaller, heating speed is fast；Black furnace body requires to reduce to furnace tube material, and heating power reduces very much, and stove cost substantially drops
It is low.Second: furnace body is easy to do greatly, and pressure rises slowly in furnace body when reacting violent, has enough time to control nitrogen flow, avoids
Nitridation process temperature rise and caused by furnace interior pressure steeply rise bring risk factor, the safety is improved.Third:
The multiple reaction units of setting, have at least two sets of resistive heaters, burner hearth and heat insulation furnace cover and thermocouple, accordingly in one furnace body
Two sets of temperature controllers of configuration and contactor, a stove be equivalent to two stoves, nitrogen makes full use of, reduce nitrogen consumption,
One times of output increased of nitridation, efficiency doubles.Heat insulation furnace cover 42 is set on furnace body 1 and automatically turns on close mechanism and circulation
Pipeline 18 cool mechanism can make furnace body 1 uniformly but quickly cooling, improve production efficiency.
Claims (3)
1. nitriding furnace inner roof brick closing device, it is characterised in that: at least one reaction is arranged in the furnace body including sealing, furnace interior
Device；Reaction unit includes the heat insulation furnace cover for keeping the temperature burner hearth, moving up and down；Heat insulation furnace cover connects hoisting mechanism, and hoisting mechanism is another
One end is pierced by furnace body by the through-hole on furnace wall, and sealing mechanism is arranged between hoisting mechanism and furnace body.
2. nitriding furnace inner roof brick closing device according to claim 1, it is characterised in that: the hoisting mechanism is cylinder, gas
The piston rod of cylinder, which by through-hole enters furnace body and is connected with heat insulation furnace cover, moves up and down heat insulation furnace cover, close between piston rod and through-hole
Envelope.
3. nitriding furnace inner roof brick closing device according to claim 2, it is characterised in that: the sealing mechanism outer wall and through-hole
The sealing hole by piston rod is arranged in welding, sealing mechanism inside, and sealing mechanism sets gradually Y type sealing flange, Y from top to bottom
Type sealing ring, O-shaped sealing flange, O-ring seal, O-ring seal, O-shaped sealing flange, y-type seal ring, Y type sealing flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821297759.0U CN209085317U (en) | 2018-08-13 | 2018-08-13 | Nitriding furnace inner roof brick closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821297759.0U CN209085317U (en) | 2018-08-13 | 2018-08-13 | Nitriding furnace inner roof brick closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209085317U true CN209085317U (en) | 2019-07-09 |
Family
ID=67114518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821297759.0U Active CN209085317U (en) | 2018-08-13 | 2018-08-13 | Nitriding furnace inner roof brick closing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986060A (en) * | 2019-11-26 | 2020-04-10 | 北京航化节能环保技术有限公司 | Heat bypass safety discharge system of heat accumulating type thermal oxidation furnace |
| CN112050641A (en) * | 2020-07-30 | 2020-12-08 | 因达孚先进材料(苏州)有限公司 | Carbonization furnace system |
| CN113308665A (en) * | 2021-05-30 | 2021-08-27 | 南京豪龙刀具制造有限公司 | Wear-resistant hard alloy cutter and strengthening and toughening treatment device thereof |
| CN116294611A (en) * | 2023-05-16 | 2023-06-23 | 福建福碳新材料科技有限公司 | High-temperature vacuum furnace with heat preservation structure for special graphite processing |
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2018
- 2018-08-13 CN CN201821297759.0U patent/CN209085317U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986060A (en) * | 2019-11-26 | 2020-04-10 | 北京航化节能环保技术有限公司 | Heat bypass safety discharge system of heat accumulating type thermal oxidation furnace |
| CN112050641A (en) * | 2020-07-30 | 2020-12-08 | 因达孚先进材料(苏州)有限公司 | Carbonization furnace system |
| CN113308665A (en) * | 2021-05-30 | 2021-08-27 | 南京豪龙刀具制造有限公司 | Wear-resistant hard alloy cutter and strengthening and toughening treatment device thereof |
| CN116294611A (en) * | 2023-05-16 | 2023-06-23 | 福建福碳新材料科技有限公司 | High-temperature vacuum furnace with heat preservation structure for special graphite processing |
| CN116294611B (en) * | 2023-05-16 | 2023-08-01 | 福建福碳新材料科技有限公司 | High-temperature vacuum furnace with heat preservation structure for special graphite processing |
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