CN110094967A - A kind of vacuum drying oven using dry type screw pump - Google Patents
A kind of vacuum drying oven using dry type screw pump Download PDFInfo
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- CN110094967A CN110094967A CN201910377118.9A CN201910377118A CN110094967A CN 110094967 A CN110094967 A CN 110094967A CN 201910377118 A CN201910377118 A CN 201910377118A CN 110094967 A CN110094967 A CN 110094967A
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- body assembly
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- 238000001291 vacuum drying Methods 0.000 title claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 60
- 229910002804 graphite Inorganic materials 0.000 claims description 55
- 239000010439 graphite Substances 0.000 claims description 55
- 230000007246 mechanism Effects 0.000 claims description 19
- 239000007858 starting material Substances 0.000 claims description 9
- -1 carbonic acid aluminum Chemical compound 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 239000000428 dust Substances 0.000 abstract description 10
- 238000004663 powder metallurgy Methods 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 238000005245 sintering Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007872 degassing Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply devices
- F27B2005/166—Means to circulate the atmosphere
Abstract
The present invention relates to vacuum drying oven technical fields, more particularly to a kind of vacuum drying oven using dry type screw pump, it include furnace body assembly, muff, heater, vacuum system, water cooling plant and air charging system, the outside of furnace body assembly is arranged in vacuum system and water cooling plant, vacuum system, the working end of water cooling plant and air charging system is connected to the inside of furnace body assembly, vacuum system includes middle vacuum dry vacuum pump, dry screw vacuum pump and vacuum meter, the input terminal of middle vacuum dry vacuum pump is connected to the inside of furnace body assembly, the input terminal of dry screw vacuum pump is connected to the output end of middle vacuum dry vacuum pump, vacuum meter is fixedly mounted on furnace body assembly and the working end of vacuum meter is placed in the inside of furnace body assembly；The vacuum drying oven is structurally reasonable, and the service life is long, failure rate is low, while solving the problems, such as in the pump chamber of traditional vacuum pump assembly containing oil, suitable for techniques such as the powder metallurgy, pharmacy and the chemical industry that generate a large amount of dust and vapor.
Description
Technical field
The present invention relates to vacuum drying oven technical fields, and in particular to a kind of vacuum drying oven using dry type screw pump.
Background technique
With flourishing for China's industry especially auto industry, the demand to powder metallurgy product is higher and higher,
Ask also higher and higher, the techniques such as powder processed, reduction, compacting and sintering in powder metallurgy product preparation process will use powder
Metallurgical furnace.Vacuum drying oven is widely used in powder metallurgy process and metal material heat treatment, wherein vacuum drying oven can by vacuum degree point
It is divided into low vacuum furnace, high vacuum furnace and ultrahigh vacuum furnace；It is also required to be applicable in using to vacuum drying oven in pharmacy and chemical industry simultaneously
In occasions such as distillation, drying and degassings.
Vacuum is the finger pressure any gaseous space small compared with normal pressure.The space of absolutely not any substance is considered as " absolutely
To vacuum ", but be actually to be not present.Therefore air pressure is lower, and vacuum degree is higher, the meaning of low pressure and high vacuum expression
It is identical；
Vacuum is exactly the process of pumping and exhaust, and usually we are known as the equipment for generating vacuum with physical method to be evacuated
Machine, vacuum pump, or referred to as pump.It is true that the minimum pressure that pump or vacuum system can reach after the enough time that works is known as the limit
Sky, for all kinds of vacuum pumps due to mechanism itself and design, the vacuum degree that can be obtained all has certain property；
The vacuum degree that conventional process needs in a vacuum furnace is middle vacuum degree, and national standard (GB3163-1982) is by vacuum
Degree is divided into four low vacuum, middle vacuum, high vacuum and ultrahigh vacuum regions, gone in vacuum drying oven sealing in it is true
Sky just needs vacuum pump, and our common pumping fluids several classes as follows:
Blade oil-sealed rotary pump, lobe pump, oil diffusion pump, slide valve pump, water ring pump etc., this kind pump in Roots's pump chamber and turn
Oil-free for dry type when son work, to the dust in pumped gas, water vapour is insensitive, oil vapour contaminated vacuum system the case where ratio
Oil diffusion pump, oil sealing mechanical pump to be lacked more.
Chinese patent CN208171033U discloses a kind of pumped vacuum systems of vacuum drying oven, including the first roots blower,
Two roots blowers, filter device and vacuum drying oven connecting tube, first roots blower is connected with second roots blower, described
Filter device is separately connected the second roots blower and vacuum drying oven connecting tube, the vacuum drying oven connecting tube input end connection vacuum drying oven
Burner hearth, the filter device is for filtering flying dust.The utility model is mutual by setting filter device, and in filter device
It squeezes ground and the cotton core that several diameters are 60mm~80mm is set, so that flying in sintering furnace when to vacuum drying oven vacuumize process
Dirt and beavy metal impurity are deadened at filter device, so that the first roots blower and second will not be entered with these impurity
Roots blower is damaged in roots blower, the safety of entire pumped vacuum systems is improved, extends the service life of system；
The pumped vacuum systems of the patent disclosure has used two Roots vacuum series connections of pumps, and Roots vaccum pump is dry vacuum
Pump, is influenced lower by dust, vapor；But Roots vaccum pump cannot start under normal pressure under normal circumstances, unless opening
The power of dynamic motor is quite big, but high-power start motor has injury to the operation of pump, so Roots vaccum pump cannot individually make
With, it is necessary to it is used with fore pump composition unit, so a kind of pumped vacuum systems of vacuum drying oven of the patent disclosure uses two sieve
It is short that the series connection of pumps of thatch vacuum can will generate greatly injury, the pumped vacuum systems high failure rate, service life in the service life to pump.
Chinese patent CN203875340U discloses a kind of metal powder vacuum sintering furnace, including furnace seat and is fixed thereon
Sintering furnace；Interior insulated door, graphite material storing box, pulley, bracket and escape pipe are equipped in furnace body；Vacuum evacuation device includes vacuum
Pipe, pneumatic high vacuum flapper valve, the first bellows damper, Roots vaccum pump, the second bellows damper, rotary vane type vacuum
Pump, vacuum pump base and exhaust pipe.The advantages of metal powder vacuum sintering furnace is structure novel, sealing performance and thermal insulation property
Good, stability is good when vacuum evacuation device uses；
The design of common vacuum system is the unit of lobe pump and oil sealing vacuum pump, the metal powder of the patent disclosure
The rotary-vane vaccum pump that vacuum sintering furnace uses is exactly oil sealing vacuum pump, although this vacuum pump set is able to satisfy required vacuum
Degree, but it is very harsh to the environmental requirement being evacuated, it is impossible to be used in the occasion containing a large amount of vapor and dusty gas；
Product in Powder Metallurgy Industry, vacuum drying oven often contains the additives such as a large amount of dust and vapor, if powder
End, vapor equal size are excessively high, then can be drawn into vacuum pump set to react with the oil in oil sealing vacuum pump, cause
Pump group can not be continued to use because of contaminated, and the oil needed replacing in pump chamber can just continue to use；
Also there is same problem in pharmacy and chemical industry, is often generated in occasions such as distillation, drying and degassings
A large amount of vapor even corrosive gas, thus the quickly intracavitary oil of pollution fore pump；The frequently oily meeting in replacement pump chamber
Cost is greatly increased, while reducing working efficiency.
So needing to find fore pump of the dry pump that one kind can be similar with vacuum pump as vacuum pump, dry type is formed
Vacuum system, the environment for complicated vacuum drying oven.
Summary of the invention
The purpose of the present invention is to provide a kind of vacuum drying ovens using dry type screw pump, and the vacuum drying oven is structurally reasonable, pass through
Fore pump drives Roots vaccum pump or molecular pump starting, and the service life is long, failure rate is low, while solving traditional vacuum pump assembly
Pump chamber in the problem containing oil, suitable for techniques such as the powder metallurgy, pharmacy and the chemical industry that generate a large amount of dust and vapor.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of vacuum drying oven using dry type screw pump is provided, include furnace body assembly, muff, heater, vacuum system,
Water cooling plant and air charging system, muff and heater are fixedly mounted on furnace body assembly, vacuum system and water cooling plant setting
In the outside of furnace body assembly, the working end of vacuum system, water cooling plant and air charging system is connected to the inside of furnace body assembly, very
Empty set system includes middle vacuum dry vacuum pump, dry screw vacuum pump and vacuum meter, the input terminal of middle vacuum dry vacuum pump
It is connected to the inside of furnace body assembly, the input terminal of dry screw vacuum pump is connected to the output end of middle vacuum dry vacuum pump, very
Sky meter is fixedly mounted on furnace body assembly and the working end of vacuum meter is placed in the inside of furnace body assembly.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, vacuum system further includes having pneumatic type three
Port valve and vacuum line, the first working end of pneumatic type triple valve are mounted on the side of furnace body assembly and the inside with furnace body assembly
Connection, the second working end of pneumatic type triple valve are communicated with the atmosphere, and the third working end of pneumatic type triple valve passes through vacuum line
Successively with middle vacuum dry vacuum pump and dry screw vacuum pump sequential communication.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, middle vacuum dry vacuum pump is that Roots is true
Sky pump.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, middle vacuum dry vacuum pump is that molecule is true
Sky pump.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, vacuum is calculated as high vacuum electric vacuum
Meter.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, heat preservation is placed on the interior of furnace body assembly
Portion, heater are placed in the inside of muff.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, middle vacuum dry vacuum pump and dry type spiral shell
Corrosion-inhibiting coating is coated with inside bar vacuum pump.
It include furnace shell, bell and machine of uncapping as a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump
Structure, furnace shell are open-topped tubular shell, and opening of the bell the cover at the top of furnace shell, cap-opening mechanism is fixedly mounted on furnace shell
Side, the working end of cap-opening mechanism is fixedly connected with bell；
Cap-opening mechanism includes the arm of force, linear actuator and rotation starter, and one end of the arm of force and the top of bell are fixed
Connection, the other end of the arm of force extend horizontally outward and are suspended on the outside of furnace shell, and linear actuator can be mounted on rotating horizontally
The working end of the side of furnace shell, linear actuator is arranged vertically upwards and is fixedly connected with the free end of the arm of force, rotates starter
Working shaft and linear actuator rotary shaft pass through roller chain drives connect.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, muff include side muff and
Top muff, side muff are the cylindrical shape of bottom opening, offer coaxial through-hole, through-hole at the top of the muff of side
For the truncated conical shape through-hole that upper bottom is arranged downward, top muff is removably mounted on the top of side muff, and top is protected
Temperature set agrees with through-hole；The diameter of top muff is greater than the diameter of heater, and top muff is fixedly connected with bell；
Muff includes the Stainless Steel Shell successively connected from the outside to the core, carbonic acid aluminum fiber mat and graphite carbon felt, stainless
It is fixedly connected between steel sheel, carbonic acid aluminum fiber mat and graphite felt by graphite plate.
As a kind of a kind of preferred embodiment of vacuum drying oven using dry type screw pump, heater include upper graphite circle, under
Graphite circle and graphite rod, graphite rod share 12, and graphite rod is uniformly distributed around the axis of muff, and upper graphite circle is mounted on graphite
The top of stick, lower graphite circle are mounted on the bottom end of graphite rod, and upper graphite circle connects two adjacent graphite rods, lower stone by phased manner
Two graphite rods that ink circle connection is not connected by upper graphite circle.
Beneficial effects of the present invention:
Before work, bell is opened by cap-opening mechanism, inside object merging heater to be heated, then by uncapping
Mechanism is by bell the cover on furnace shell, and then pneumatic type triple valve is connected to inside vacuum line and furnace body assembly, and dry type screw rod is true
Empty pump startup vacuumizes furnace body assembly, is read by vacuum meter and determines that the vacuum degree inside furnace body assembly reaches low vacuum
After degree, vacuum dry vacuum pump further vacuumizes furnace body assembly in starting, reaches inside the furnace body assembly
Vacuum；
When work, pneumatic type triple valve cuts off the connection between furnace body assembly and vacuum line, middle vacuum dry vacuum pump
It is closed with dry screw vacuum pump, then connects the circuit for being connected to heater, by low-voltage, high-current heater is generated heat,
Object inside heater is heated, so that it is sintered or is distilled, while in some processes, it is also necessary to open inflation dress
It sets, so that protective gas is full of inside furnace body assembly, so that the object inside heater is sintered under protective atmosphere；
After work, pneumatic type triple valve is connected to furnace body assembly and atmosphere, releases vacuum inside furnace body assembly, atmosphere passes through gas
Dynamic formula triple valve enters inside furnace body assembly, and subsequent water cooling plant inside furnace body assembly to cooling down, then passes through cap-opening mechanism
Bell is opened, staff again takes out the object inside heater.
1, the vacuum drying oven solves the problems, such as to be suitable for generating a large amount of dust containing oil in the pump chamber of traditional vacuum pump assembly
With the techniques such as powder metallurgy, pharmacy and the chemical industry of vapor；
2, the vacuum drying oven is structurally reasonable, drives Roots vaccum pump or molecular pump to start by fore pump, service life length, event
Barrier rate is low.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described.It should be evident that drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of perspective view one of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Fig. 2 is a kind of side view of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Fig. 3 is a kind of top view of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Fig. 4 is a kind of perspective view two of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Fig. 5 is a kind of part-structure front view of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Fig. 6 is cross-sectional view at the A-A of Fig. 5；
Fig. 7 is partial enlarged view at the B of Fig. 6；
Fig. 8 is a kind of part-structure stereo decomposing of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention
Figure；
Fig. 9 is a kind of part-structure perspective view of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
Figure 10 is a kind of heater perspective view of the vacuum drying oven using dry type screw pump described in the embodiment of the present invention；
In figure:
1, furnace body assembly；1a, furnace shell；1b, bell；1c, cap-opening mechanism；1c1, the arm of force；1c2, linear actuator；1c3, rotation
Turn starter；
2, muff；2a, side muff；2a1, through-hole；2b, top muff；
3, heater；3a, upper graphite circle；3b, lower graphite circle；3c, graphite rod；
4, vacuum system；4a, middle vacuum dry vacuum pump；4b, dry screw vacuum pump；4c, vacuum meter；4d, pneumatic type
Triple valve；4e, vacuum line；
5, water cooling plant；
6, air charging system.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Wherein, the drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as to this
The limitation of patent；Embodiment in order to better illustrate the present invention, the certain components of attached drawing have omission, zoom in or out, not
Represent the size of actual product；It will be understood by those skilled in the art that certain known features and its explanation may be omitted and be in attached drawing
It is understood that.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that closed if there is the orientation of the instructions such as term " on ", "lower", "left", "right", "inner", "outside" or position
System is merely for convenience of description of the present invention and simplification of the description to be based on the orientation or positional relationship shown in the drawings, rather than indicates
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore retouch in attached drawing
The term for stating positional relationship only for illustration, should not be understood as the limitation to this patent, for the common skill of this field
For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
In the description of the present invention unless specifically defined or limited otherwise, if there are the indicate indicators such as term " connection "
Between connection relationship, which shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or at
One；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection of two components interiors or the interaction relationship of two components.For those of ordinary skill in the art and
Speech, can understand the concrete meaning of above-mentioned term in the present invention with concrete condition.
It include furnace body assembly 1, muff referring to figs. 1 to a kind of vacuum drying oven using dry type screw pump shown in Fig. 10
2, heater 3, vacuum system 4, water cooling plant 5 and air charging system 6, muff 2 and heater 3 are fixedly mounted on furnace body assembly 1
On, vacuum system 4 and water cooling plant 5 are arranged in the outside of furnace body assembly 1, vacuum system 4, water cooling plant 5 and air charging system 6
Working end is connected to the inside of furnace body assembly 1, and vacuum system 4 includes middle vacuum dry vacuum pump 4a, dry type screw vacuum
Pump 4b and vacuum meter 4c, the input terminal of middle vacuum dry vacuum pump 4a are connected to the inside of furnace body assembly 1, dry screw vacuum pump
The input terminal of 4b is connected to the output end of middle vacuum dry vacuum pump 4a, vacuum meter 4c be fixedly mounted on furnace body assembly 1 and
The working end of vacuum meter 4c is placed in the inside of furnace body assembly 1.
Furnace body assembly 1 is for placing metal powder to be sintered or medical fluid and chemical solution to be distilled；
Muff 2 is for keeping the temperature furnace body assembly 1；
Heater 3 is for heating furnace body assembly 1；
Vacuum system 4 is for vacuumizing furnace body assembly 1；
Water cooling plant 5 is used for cooling down inside furnace body assembly 1；
Air charging system 6 is used to be filled with protective gas to the inside of furnace body assembly 1, product may be needed to exist in part of production
It is sintered under the atmosphere of protective gas；
Wherein dry screw vacuum pump 4b is to make synchronous high-speed using a pair of mutually ratcheting screw rod in pump case and reversely revolve
Then the air-breathing and scavenging action, two screw rods generated is mounted in pump case through fine dynamic balance by bearing support, screw rod and spiral shell
There is certain interval between bar, therefore between each other without friction smooth running, low noise when pump work, working chamber is without lubrication
Oil, therefore dry type screw pump can extract the gas occasion containing a large amount of vapor and dust, can pump as oil sealing vacuum
Substitute；
Low efficiency is vacuumized due to dry screw vacuum pump 4b, can only realize the effect of low vacuum, thus also need and
Middle vacuum dry vacuum pump 4a is composed in series middle vacuum dry vacuum unit, and vacuum dry type is true in dry screw vacuum pump 4b conduct
The fore pump of sky pump 4a, to realize the middle vacuum effectiveness that Powder Metallurgy Industry needs；Dry vacuum unit is oil-free, to being evacuated
The case where dust, water vapour in body is insensitive, and oil vapour pollutes vacuum pump set is fewer than oil diffusion pump, oil sealing mechanical pump, can mention
High yield quality reduces cost, improves efficiency.
Vacuum system 4 further includes having pneumatic type triple valve 4d and vacuum line 4e, the first work of pneumatic type triple valve 4d
End be mounted on furnace body assembly 1 side and be connected to the inside of furnace body assembly 1, the second working end of pneumatic type triple valve 4d with greatly
Gas connection, the third working end of pneumatic type triple valve 4d by vacuum line 4e successively with middle vacuum dry vacuum pump 4a and dry type
Screw vacuum pump 4b sequential communication.
Before work, pneumatic type triple valve 4d is connected to inside vacuum line 4e and furnace body assembly 1, and dry screw vacuum pump 4b is opened
It is dynamic that furnace body assembly 1 is vacuumized, it is read by vacuum meter 4c and determines that the vacuum degree inside furnace body assembly 1 reaches rough vacuum
Later, vacuum dry vacuum pump 4a further vacuumizes furnace body assembly 1 in starting, reaches inside furnace body assembly 1
Middle vacuum；
When work, pneumatic type triple valve 4d cuts off the connection between furnace body assembly 1 and vacuum line 4e, and middle vacuum dry type is true
Sky pump 4a and dry screw vacuum pump 4b is closed；
After work, pneumatic type triple valve 4d is connected to furnace body assembly 1 and atmosphere, releases vacuum inside furnace body assembly 1.
Middle vacuum dry vacuum pump 4a is Roots vaccum pump.
Roots vaccum pump and dry screw vacuum pump are composed in series vacuum pump set, and country can be realized in furnace body assembly 1
The middle vacuum divided in standard, and vacuum pump set dry type is oil-free, is suitable for Powder Metallurgy Industry.
Middle vacuum dry vacuum pump 4a is molecular pump.
Molecular pump and dry screw vacuum pump are composed in series vacuum pump set, and country can be realized in furnace body assembly 1
The high vacuum divided in standard, and vacuum pump set dry type is oil-free, it is higher to vacuum level requirements suitable for Powder Metallurgy Industry
Part.
Vacuum meter 4c is high vacuum ion gauge.
Vacuum meter 4c is used to measure the vacuum degree inside furnace body assembly 1, and the range of vacuum meter 4c, which is located in national standard, to be drawn
The high vacuum region divided, the environment suitable for middle vacuum and high vacuum；And staff can also be direct by vacuum meter 4c
It hunts leak to furnace body assembly 1, alcohol, ether or acetone is applied to tested place, only need can directly pass through vacuum meter within several seconds
The reading variation of 4c obtains the conclusion whether tested place reveals, and efficiency is very high.
Muff 2 is placed in the inside of furnace body assembly 1, and heater 3 is placed in the inside of muff 2.
Vacuum drying oven exceptionally hot type and two kinds of internal heat type, muff 2 is placed in the inside of furnace body assembly 1, and heater 3 is set simultaneously
Internal heat type vacuum drying oven can be then manufactured in the inside of muff 2, internal heat type vacuum drying oven is not limited by retort, can manufacture large size
High temperature furnace；And it is easily achieved the automation of overall process, it is pollution-free in work, environment is good, safe operation；And furnace thermal inertia
Small, heating and cooling process circulation are short, and the thermal efficiency is high, and production efficiency is also high；And temperature uniformity is good, workpiece homogeneous heating,
Deform small, good product quality.
Corrosion-inhibiting coating is coated with inside middle vacuum dry vacuum pump 4a and dry screw vacuum pump 4b.
Middle vacuum dry vacuum pump 4a and dry screw vacuum pump 4b form oil-free dry vacuum pump set, do not generate waste oil and
Oil smoke, energy conservation and environmental protection, while being influenced by vapor and dust smaller, after corrosion-inhibiting coating is coated in inside, it can also subtract
The influence of few corrosive gas, especially suitable for the occasions such as product distillation, dry and degassing in pharmacy, chemical process, the nothing
Oily dry vacuum unit is not influenced by the corrosive gas that vapor and chemical industry that pharmacy generates generate.
It include furnace shell 1a, bell 1b and cap-opening mechanism 1c, furnace shell 1a is open-topped tubular shell, bell 1b the cover
Opening at the top of furnace shell 1a, cap-opening mechanism 1c are fixedly mounted on the side of furnace shell 1a, the working end of cap-opening mechanism 1c and furnace
Lid 1b is fixedly connected；
Cap-opening mechanism 1c include arm of force 1c1, linear actuator 1c2 and rotation starter 1c3, one end of arm of force 1c1 with
The top of bell 1b is fixedly connected, and the other end of arm of force 1c1 extends horizontally outward and is suspended on the outside of furnace shell 1a, linear drives
Device 1c2 can be mounted on the side of furnace shell 1a with rotating horizontally, and the working end of linear actuator 1c2 is arranged vertically upwards and and the arm of force
The free end of 1c1 is fixedly connected, and the rotary shaft of the working shaft and linear actuator 1c2 that rotate starter 1c3 is passed by roller chain
Dynamic connection.
Linear actuator 1c2 is hydraulic cylinder, and rotation starter 1c3 is the servo motor for being equipped with retarder, furnace body assembly 1
When needing to uncap, linear actuator 1c2 driving arm of force 1c1 drives bell 1b to be raised above to be detached from furnace shell 1a, then rotates
Starter 1c3 starting drives the fixed part of linear actuator 1c2 to rotate by roller chain, so that bell 1b is rotatably moved to
The side of furnace shell 1a.
Muff 2 includes side muff 2a and top muff 2b, and side muff 2a is the cylinder of bottom opening
Shape, the top side muff 2a offer coaxial through-hole 2a1, and through-hole 2a1 is the truncated conical shape through-hole that upper bottom is arranged downward,
Top muff 2b is removably mounted on the top of side muff 2a, and top muff 2b and through-hole 2a1 agrees with；Top is protected
The diameter of temperature set 2b is greater than the diameter of heater 3, and top muff 2b is fixedly connected with bell 1b；
Top muff 2b is limited the movement relative to side muff 2a axis in the radial direction by through-hole 2a1, together
When top muff 2b limited by through-hole 2a1 along moving on self gravity direction so that pushing up under the effect of gravity
Portion muff 2b opening of the cover in side muff 2a naturally；
When bell 1b uncaps, linear actuator 1c2 driving bell 1b rises while top muff 2b being driven to be detached from side
Muff 2a is moved upwards, so that material to be heated can be placed to heater 3 by through-hole 2a1 by staff
It is internal；
Muff 2 includes the Stainless Steel Shell successively connected from the outside to the core, carbonic acid aluminum fiber mat and graphite carbon felt, stainless
It is fixedly connected between steel sheel, carbonic acid aluminum fiber mat and graphite felt by graphite plate.
Three layers of graphite carbon felt are connected by graphite plate, then toward two layers of carbonic acid aluminum fiber mat of package on the outside of graphite carbon felt, finally
One layer of stainless steel is wrapped up in outermost layer, robust good muff can be formed.
Heater 3 includes that upper graphite circle 3a, lower graphite circle 3b and graphite rod 3c, graphite rod 3c share 12, graphite
Stick 3c is uniformly distributed around the axis of muff 2, and upper graphite circle 3a is mounted on the top of graphite rod 3c, and lower graphite circle 3b is mounted on graphite
The bottom end of stick 3c, upper graphite circle 3a connect two adjacent graphite rod 3c by phased manner, and lower graphite circle 3b connection does not pass through upper stone
Two graphite rod 3c of ink circle 3a connection.
Heater 3 is electrically connected with external circuitry, is passed through low-voltage, high-current and heater 3 is generated heat.
The working principle of the invention:
Before work, bell 1b is opened by cap-opening mechanism 1c, inside object merging heater 3 to be heated, is then led to
Cap-opening mechanism 1c is crossed by bell 1b the cover on furnace shell 1a, then pneumatic type triple valve 4d is connected to vacuum line 4e and furnace body assembly
Inside 1, dry screw vacuum pump 4b starting vacuumizes furnace body assembly 1, is read by vacuum meter 4c and determines furnace body assembly 1
After internal vacuum degree reaches rough vacuum, vacuum dry vacuum pump 4a further take out to furnace body assembly 1 true in starting
Sky reaches middle vacuum inside furnace body assembly 1；
When work, pneumatic type triple valve 4d cuts off the connection between furnace body assembly 1 and vacuum line 4e, and middle vacuum dry type is true
Sky pump 4a and dry screw vacuum pump 4b is closed, and is then connected the circuit for being connected to heater 3, to send out by low-voltage, high-current
Hot body 3 generates heat, and heats to the object inside heater 3, so that it is sintered or is distilled, while in some processes, it is also necessary to
Air charging system 6 is opened, so that protective gas is full of inside furnace body assembly 1, so that the object inside heater 3 is in protection gas
It is sintered under atmosphere；
After work, pneumatic type triple valve 4d is connected to furnace body assembly 1 and atmosphere, and vacuum is released inside furnace body assembly 1, and atmosphere is logical
It crosses pneumatic type triple valve 4d to enter inside furnace body assembly 1, subsequent water cooling plant 5 inside furnace body assembly 1 to cooling down, then passes through
Cap-opening mechanism 1c opens bell 1b, and staff again takes out the object inside heater 3.
It is to be understood that above-mentioned specific embodiment is only that presently preferred embodiments of the present invention and institute's application technology are former
Reason.It will be understood by those skilled in the art that various modifications, equivalent replacement, variation etc. can also be done to the present invention.But this
A little transformation, all should be within protection scope of the present invention without departing from spirit of the invention.In addition, present specification and power
Some terms used in sharp claim are not limitation, it is only for convenient for description.
Claims (10)
1. a kind of vacuum drying oven using dry type screw pump, which is characterized in that include furnace body assembly (1), muff (2), fever
Body (3), vacuum system (4), water cooling plant (5) and air charging system (6), muff (2) and heater (3) are fixedly mounted on furnace body
On assembly (1), vacuum system (4) and water cooling plant (5) setting are in the outside of furnace body assembly (1), vacuum system (4), water cooling dress
The working end for setting (5) and air charging system (6) is connected to the inside of furnace body assembly (1), and vacuum system (4) includes that middle vacuum is dry
Formula vacuum pump (4a), dry screw vacuum pump (4b) and vacuum meter (4c), the input terminal and furnace of middle vacuum dry vacuum pump (4a)
The inside of body assembly (1) is connected to, the output end of the input terminal of dry screw vacuum pump (4b) and middle vacuum dry vacuum pump (4a)
Connection, vacuum meter (4c) is fixedly mounted on furnace body assembly (1) and the working end of vacuum meter (4c) is placed in furnace body assembly (1)
It is internal.
2. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that vacuum system (4) is also
It include pneumatic type triple valve (4d) and vacuum line (4e), it is total that the first working end of pneumatic type triple valve (4d) is mounted on furnace body
It being connected at the side of (1) and with the inside of furnace body assembly (1), the second working end of pneumatic type triple valve (4d) is communicated with the atmosphere,
The third working end of pneumatic type triple valve (4d) by vacuum line (4e) successively with middle vacuum dry vacuum pump (4a) and dry type
Screw vacuum pump (4b) sequential communication.
3. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that middle vacuum dry vacuum
Pumping (4a) is Roots vaccum pump.
4. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that middle vacuum dry vacuum
Pumping (4a) is molecular pump.
5. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that vacuum meter (4c) is height
Vacuum ion gauge.
6. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that muff (2) is placed in
The inside of furnace body assembly (1), heater (3) are placed in the inside of muff (2).
7. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that middle vacuum dry vacuum
Corrosion-inhibiting coating is coated with inside pump (4a) and dry screw vacuum pump (4b).
8. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that include furnace shell
(1a), bell (1b) and cap-opening mechanism (1c), furnace shell (1a) are open-topped tubular shell, and bell (1b) the cover is in furnace shell
Opening at the top of (1a), cap-opening mechanism (1c) are fixedly mounted on the side of furnace shell (1a), the working end of cap-opening mechanism (1c) with
Bell (1b) is fixedly connected；
Cap-opening mechanism (1c) includes the arm of force (1c1), linear actuator (1c2) and rotates starter (1c3), the arm of force (1c1)
One end is fixedly connected with the top of bell (1b), and the other end of the arm of force (1c1) extends horizontally outward and is suspended on furnace shell (1a)
Outside, linear actuator (1c2) can be mounted on the side of furnace shell (1a), the working end of linear actuator (1c2) with rotating horizontally
It is arranged vertically upwards and is fixedly connected with the free end of the arm of force (1c1), rotate the working shaft and linear actuator of starter (1c3)
The rotary shaft of (1c2) is connected by roller chain drives.
9. a kind of vacuum drying oven using dry type screw pump according to claim 8, which is characterized in that muff (2) includes
There are side muff (2a) and top muff (2b), side muff (2a) is the cylindrical shape of bottom opening, side heat preservation
It is offered coaxial through-hole (2a1) at the top of set (2a), through-hole (2a1) is the truncated conical shape through-hole that upper bottom is arranged downward, and top is protected
Temperature set (2b) is removably mounted on the top of side muff (2a), and top muff (2b) agrees with through-hole (2a1)；Top
The diameter of muff (2b) is greater than the diameter of heater (3), and top muff (2b) is fixedly connected with bell (1b)；
Muff (2) includes the Stainless Steel Shell successively connected from the outside to the core, carbonic acid aluminum fiber mat and graphite carbon felt, stainless steel
It is fixedly connected between shell, carbonic acid aluminum fiber mat and graphite felt by graphite plate.
10. a kind of vacuum drying oven using dry type screw pump according to claim 1, which is characterized in that heater (3) includes
There are upper graphite circle (3a), lower graphite circle (3b) and graphite rod (3c), graphite rod (3c) shares 12, and graphite rod (3c) is around guarantor
The axis of temperature set (2) is uniformly distributed, and upper graphite circle (3a) is mounted on the top of graphite rod (3c), and lower graphite circle (3b) is mounted on graphite rod
The bottom end of (3c), upper graphite circle (3a) connect two adjacent graphite rods (3c) by phased manner, and lower graphite circle (3b) connection is not led to
Cross two graphite rods (3c) of graphite circle (3a) connection.
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| CN110499430A (en) * | 2019-08-23 | 2019-11-26 | 攀钢集团攀枝花钢铁研究院有限公司 | 7.5 tons of I type furnaces produce titanium sponge vacuum system |
| CN117046147A (en) * | 2023-10-13 | 2023-11-14 | 启东市鸿洋润滑产品有限公司 | Distillation plant is used in lubricating oil production and processing |
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| CN110094967B (en) | 2020-02-07 |
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Address after: 412000 floors 1-6, office building 1, ruidel Science Park, No. 755, Xianyue Ring Road, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Zhuzhou ruidel Intelligent Equipment Co.,Ltd. Address before: 412000 block B, building A2, Gaoke Xinma Jingu, 959 Tianyi Avenue, Tianyuan District, Zhuzhou City, Hunan Province Patentee before: ZHUZHOU RUIDEER PM EQUIPMENT MANUFACTURING CO.,LTD. |
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Denomination of invention: A Vacuum Furnace with Dry Screw Pump Application Effective date of registration: 20231229 Granted publication date: 20200207 Pledgee: Agricultural Bank of China Limited Zhuzhou branch Pledgor: Zhuzhou ruidel Intelligent Equipment Co.,Ltd. Registration number: Y2023980075790 |