CN108458589A - A kind of vacuum sintering furnace of calandria and realization multizone temperature control - Google Patents
A kind of vacuum sintering furnace of calandria and realization multizone temperature control Download PDFInfo
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- CN108458589A CN108458589A CN201810283615.8A CN201810283615A CN108458589A CN 108458589 A CN108458589 A CN 108458589A CN 201810283615 A CN201810283615 A CN 201810283615A CN 108458589 A CN108458589 A CN 108458589A
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- heating
- calandria
- heating structure
- heating plate
- sintering furnace
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- 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
-
- 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
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- 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
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- 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
- F27B5/18—Arrangement of controlling, monitoring, alarm or like devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Control Of Resistance Heating (AREA)
- Resistance Heating (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The present invention discloses the vacuum sintering furnace of a kind of calandria and realization multizone temperature control.The vacuum sintering furnace includes seal box, heating device and heat insulation cylinder；Heating device includes the outside that multiple calandria groups are evenly distributed in seal box, and each calandria group includes that two structures are identical and be looped around the calandria of the side of seal box；Calandria includes the first heating structure and the second heating structure；The head end of first heating structure and the second heating structure is connected with the output end of single-phase transformer, and the first heating structure is connect with the end of the second heating structure by long connection sheet；Single-phase transformer, the first heating structure and the second heating structure constitute current loop.Calandria and vacuum sintering furnace using the present invention, each calandria heats corresponding region, realize the automatic adjustment of the heating temperature of calandria, the heating device constituted using multiple calandrias heats the multiple regions of vacuum sintering furnace, realizes the control to vacuum sintering furnace in-furnace temperature homogeneity.
Description
Technical field
The present invention relates to domain of control temperature, more particularly to the vacuum-sintering of a kind of calandria and realization multizone temperature control
Stove.
Background technology
Vacuum sintering furnace needs to increase furnace inner space, but furnace inner space increases, can cause different in stove to improve production capacity
There are prodigious differences for the temperature in region, it will usually ＞ ± 10 DEG C, and as furnace inner space increases, different zones were heating up
Cheng Zhong, due to factors such as thermal capacitance, heating, heat preservations, the temperature difference of different zones is counter bigger, usual ＞ ± 20 DEG C.On the other hand, by
In vacuum drying oven heater heat transfer mainly with radiation mode, but due under different temperatures (intensity of light) radiation thermal conduction imitate
Rate is different, and the otherness of temperature is 3 times of high temperature between the stove inner region under low temperature, to the temperature of the vacuum drying oven low temperature with degreasing function
Degree area uniformity will have a direct impact on the degreasing effect of product, and the carbon content etc. of final products is made deviation occur.Low temperature：Degreasers
Skill, temperature are generally≤600 DEG C, high temperature：Sintering process, temperature are generally >=1000 DEG C, when low temperature, and front and back 10 DEG C of difference is made
Differ larger at front and back product size, degreasing process causes before can not being made up if even if front and back temperature is close when high temperature sintering
Influence.Cryogenic temperature area uniformity and high-temperature temperature area uniformity are inconsistent, and causing can not be simultaneous simultaneously in actual production
It cares for.Therefore, temperature distribution evenness is a very important index for detecting vacuum sintering furnace performance, in stove, before, during and after,
The upper and lower areas Deng Ge temperature deviation is smaller, and the sintered size of processed material and Properties Control are better, and yield of coming out of the stove is higher, is produced into
This is lower.
Existing vacuum sintering furnace usually heats seal box by the heating device of one, when front and back or upper and lower temperature
When degree difference is larger, resistance value is adjusted by the size of regulation heating body, is then kept the temperature by the thermal insulation material of import,
To reduce the difference of each area's temperature of vacuum sintering furnace.Therefore, the temperature control method temperature of existing vacuum sintering furnace is not easy to adjust,
And cost is higher.
Invention content
It is existing to solve the object of the present invention is to provide a kind of calandria and the vacuum sintering furnace of realization multizone temperature control
The heating device of one and occur up and down, front and back temperature deviation it is larger, cause product size and aberrations in property be larger, equipment temperature control
The problem of adjustability difference, to reduce the manufacturing cost and production cost of vacuum sintering furnace.
To achieve the above object, the present invention provides following schemes：
A kind of calandria, three adjacent sides of the calandria composition prism, the calandria include the first heating
Structure and the second heating structure；First heating structure includes first electrode stick, multiple first heating plates and first jiao multiple
Connection sheet passes through first jiao of connection sheet connection, first jiao of connection between two neighboring first heating plate
Piece is located at the incline position of the prism, and first heating plate is located at the lateral location of the prism；First electricity
The current output terminal of pole stick is connect with the first heating plate of the head end of first heating structure, the electric current of the first electrode stick
The first end of the output end of input terminal and single-phase transformer connects；
Second heating structure includes second electrode stick, multiple second heating plates and multiple second jiao of connection sheet, adjacent
It is connected by second jiao of connection sheet between two second heating plates, second jiao of connection sheet is located at the rib
The incline position of cylinder, second heating plate are located at the lateral location of the prism, and the electric current of the second electrode stick is defeated
Enter end connect with the second heating plate of the head end of second heating structure, the current output terminal of the second electrode stick with it is described
The second end of the output end of single-phase transformer connects；
Second heating of the first heating plate of the end of first heating structure and the end of second heating structure
Piece is connected by long connection sheet；The single-phase transformer, first heating structure and second heating structure constitute electric current
Circuit.
Optionally, the output end of the input terminal of the single-phase transformer and power controller connects, the power controller
Control signal and the control output end of PID controller connect, the PV input terminals of the PID and be set to heated material area
Thermocouple connection in domain, the thermocouple is for the measured temperature of the corresponding heated material of the calandria to be transmitted to
The PID controller, the PID controller are used for the output power by controlling the power controller to control the list
The output power of phase transformer, and then adjust the heating temperature of the calandria.
Optionally, the current output terminal of the first electrode stick is equipped with screw thread, passes through nut and first heating structure
Head end the first heating plate connection；The current input terminal of the second electrode stick is equipped with screw thread, passes through nut and described second
Second heating plate of the head end of heating structure connects.
Optionally, first heating plate and second heating plate are inner hollow, the sheet knot that edge is curve
Structure.
Optionally, first heating plate and second heating plate are the rectangle laminated structure of inner hollow.
A kind of vacuum sintering furnace for realizing multizone temperature control, the vacuum sintering furnace include seal box, heating device and every
Hot cylinder；The seal box be it is prismatic, the heat insulation cylinder be it is cylindrical or prismatic, the heating device be set to it is described every
Between hot cylinder and the seal box；The heating device includes multiple calandria groups, and the multiple calandria group is uniformly distributed
In the outside of the seal box, heated for the multiple regions to the seal box；
Each calandria group includes that two structures are identical and be looped around the calandria of the side of the seal box up and down；
The calandria is distributed in three adjacent sides of the seal box, and the calandria includes the first heating structure and the second heating
Structure；The head end of first heating structure is connected with the first end of the output end of single-phase transformer, second heating structure
Head end be connected with the second end of the output end of the single-phase transformer, the end of first heating structure with described second plus
The end of heat structure is connected by long connection sheet；The single-phase transformer, first heating structure and second heating are tied
Structure constitutes current loop.
Optionally, first heating structure includes that first electrode stick, multiple first heating plates are connected with multiple first jiaos
Piece passes through first jiao of connection sheet connection, first jiao of connection sheet position between two neighboring first heating plate
In the incline position of the prism, first heating plate is located at the lateral location of the prism；The first electrode stick
Current output terminal connect with the first heating plate of the head end of first heating structure, the input of the electric current of the first electrode stick
End is connect with the first end of the output end of single-phase transformer；
Second heating structure includes second electrode stick, multiple second heating plates and multiple second jiao of connection sheet, adjacent
It is connected by second jiao of connection sheet between two second heating plates, second jiao of connection sheet is located at the rib
The incline position of cylinder, second heating plate are located at the lateral location of the prism, and the electric current of the second electrode stick is defeated
Enter end connect with the second heating plate of the head end of second heating structure, the current output terminal of the second electrode stick with it is described
The second end of the output end of single-phase transformer connects.
Optionally, the vacuum sintering furnace further includes multiple thermocouples, multiple PID controllers and multiple power controllers；
For k-th of calandria, the thermocouple is connect with the PV input terminals of the PID controller, is used for k-th of calandria
The measured temperature of k-th of thermal region to be added of the corresponding seal box is transmitted to the PID controller；The PID control
The control output end of device is connect with the control signal of the power controller, the output end of the power controller and described the
The input terminal of the corresponding single-phase transformer of k calandria connects, the output power for adjusting the single-phase transformer, and then adjusts
Save temperature of k-th of the calandria to described k-th thermal region heating to be added.
Optionally, the number of the calandria group is more than 1, adds for the multiple regions to the vacuum sintering furnace
Heat.
Optionally, the vacuum sintering furnace further includes insulating materials, is used for the heating device and the vacuum-sintering
Other parts isolation in stove.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
The heating temperature that each heating region is automatically adjusted by PID realizes the even temperature control of vacuum sintering furnace.By more
The mode of controlling temperature with region, realizes that the interregional temperature difference of vacuum sintering furnace is small, dynamic temperature response is good, the area of low temperature and high temperature
Domain temperature difference can adjust consistent effect.The uniformity that can also realize temperature automatically for the larger type of furnace of volume, is compared
It is also significantly reduced in the temperature gap of traditional mode of heating, the vacuum sintering furnace of same volume, different zones, and to heat preservation
Material oneself requirement reduces, and then reduces cost.Heating device using the present invention carries vacuum-sintering stove heat, full stove yield
Height, output increased, subregion product size, carbon content, appearance and density caused by temperature deviation do not reach before solving
Target problem.Heating rate is improved, the heating process time is shortened.Save cost.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of calandria of the present invention；
Fig. 2 is the tiling schematic diagram of calandria of the present invention；
Fig. 3 is the schematic cross-section of vacuum sintering furnace of the present invention；
Fig. 4 is the structural schematic diagram of heating device in vacuum sintering furnace of the present invention；
Fig. 5 is the circuit diagram of multiple calandria groups of heating device in vacuum sintering furnace of the present invention；
Fig. 6 is the distribution schematic diagram of the in-furnace temperature test point of the specific embodiment of the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the structural schematic diagram of calandria of the present invention.As shown in Figure 1, three sides adjacents of calandria composition prism
Face forms convex.The calandria includes the first heating structure 1 and the second heating structure 2；First heating structure 1 includes
First electrode stick 1-1, multiple first heating plate 1-2 and multiple first jiao of connection sheet 1-3, the two neighboring first heating plate 1-
The incline position of the prism is located at by first jiao of connection sheet 1-3 connection, first jiao of connection sheet 1-3 between 2,
The first heating plate 1-2 is located at the lateral location of the prism；The current output terminal of the first electrode stick 1-1 with it is described
First heating plate of the head end of the first heating structure 1 connects, the current input terminal and single-phase transformer of the first electrode stick 1-1
Output end first end connection；The current output terminal of first electrode stick 1-1 is equipped with screw thread, passes through spiral shell with the first heating plate 1-2
Female 1-4 is fixedly connected.First heating plate 1-2 is connect with first jiao of connection sheet 1-3 also by bolts and nuts.
Likewise, the second heating structure 2 is identical as the structure of the first heating structure 1, the second heating structure 2 includes the second electricity
Pole stick 2-1, multiple second heating plate 2-2 and multiple second jiao of connection sheet 2-3, between the two neighboring second heating plate 2-2
By second jiao of connection sheet 2-3 connection, second jiao of connection sheet 2-3 is located at the incline position of the prism, and described second
Heating plate 2-2 is located at the lateral location of the prism, and the current input terminal of the second electrode stick 2-1 is heated with described second
Second heating plate of the head end of structure 2 connects, and the current output terminal of the second electrode stick 2-1 is defeated with the single-phase transformer
The second end of outlet connects.
First heating plate of the end of first heating structure 1 adds with the second of the end of second heating structure 2
Backing is connected by long connection sheet 3；The single-phase transformer (not shown), first heating structure 1, the long connection
Piece 3 constitutes current loop with second heating structure 2.
Can be inner hollow, the sheet knot that edge is curve about the structure of the first heating plate and the second heating plate
Structure, or the rectangle laminated structure of inner hollow, and the thickness and width of heating plate is thinned, to increase resistance, and make
Space is more compact, in addition, by the arrangement of curve shape, considerably increases swept area, keeps the object heated heated faster
Evenly.
When calandria comes into operation, the output power of single-phase transformer can be controlled by PID controller and added to adjust
The heating temperature of hot body.Specifically, the input terminal of single-phase transformer and the output end of power controller connect, the power control
The control output end of the control signal of device and PID controller connects, and the PV input terminals of the PID and is set to heated material
Thermocouple connection in region, the thermocouple are used to transmit the measured temperature of the corresponding heated material of the calandria
To the PID controller, the PID controller is used for by controlling the output power of the power controller to described in control
The output power of single-phase transformer, and then adjust the heating temperature that the calandria treats heating region.
Fig. 2 is the tiling schematic diagram of calandria of the present invention.As shown, calandria constitute a single-phase circuit, electric current from
The first end of single-phase transformer output end flows out, and flows through first electrode stick 1-1, the first heating plate 1-2, long connection sheet 3, second and adds
Backing 2-2, second electrode stick 2-1, return the second end of single-phase transformer output end.
Fig. 3 is the schematic cross-section of vacuum sintering furnace of the present invention.As shown in figure 3, the vacuum sintering furnace includes：Seal box
4, heating device 5 and heat insulation cylinder 6, are placed in inside furnace body 7.
The seal box 4 is prismatic, and the heating device 5 is set between the heat insulation cylinder 6 and the seal box 4；
Seal box guide rail 8 is installed on the bottom surface of seal box 4, is used to support the seal box 4.The heating device 5 includes multiple heating
Body group, the multiple calandria group are evenly distributed in the outside of the seal box, and seal box 4 is uniformly wrapped up.
Each calandria group includes that two structures are identical and be looped around the calandria of the side of the seal box up and down；
Calandria uses heating body structure shown in FIG. 1.The calandria is distributed in three adjacent sides of the seal box, described to add
Hot body includes the first heating structure and the second heating structure；The output end of the head end and single-phase transformer of first heating structure
First end be connected, the head end of second heating structure is connected with the second end of the output end of the single-phase transformer, described
The end of first heating structure is connect with the end of second heating structure by long connection sheet；The single-phase transformer, institute
It states the first heating structure, constitute current loop with second heating structure.First heating structure include first electrode stick,
Multiple first heating plates and multiple first jiao of connection sheet pass through one described first jiao between two neighboring first heating plate
Connection sheet connects, and first jiao of connection sheet is located at the incline position of the prism, and first heating plate is located at the rib
The lateral location of cylinder；First heating plate of the current output terminal of the first electrode stick and the head end of first heating structure
The first end of connection, the current input terminal of the first electrode stick and the output end of single-phase transformer connects；Second heating
Structure includes second electrode stick, multiple second heating plates and multiple second jiao of connection sheet, two neighboring second heating plate it
Between connected by second jiao of connection sheet, second jiao of connection sheet is located at the incline position of the prism, described
Second heating plate is located at the lateral location of the prism, and the current input terminal of the second electrode stick is tied with second heating
Second heating plate of the head end of structure connects, the current output terminal of the second electrode stick and the output end of the single-phase transformer
Second end connects.The heating body structure that herein is related to it is identical it is identical with calandria group structure refer to that the component that includes is identical, knot
Structure composition is identical.Usually whole shape can be identical, can be by the width of heating plate or curved for special position
The other parameters such as curved shape do corresponding adjustment according to actual demand.In figure 5-1 be calandria group in a calandria wherein
One electrode bar.
The vacuum sintering furnace further includes multiple Thc thermocouples 9, multiple PID controllers and multiple power controllers；At this time
The number correspondence of thermocouple, PID controller, power controller, individual event transformer and calandria.It is described for k-th of calandria
Thermocouple is connect with the PV input terminals of the PID controller, for by the of the corresponding seal box of k-th of calandria
The measured temperature of k thermal regions to be added is transmitted to the PID controller；The control output end of the PID controller with it is described
The control signal of power controller connects, and the output end of the power controller and k-th of calandria are corresponding single-phase
The input terminal of transformer connects, the output power for adjusting the corresponding single-phase transformer of k-th of calandria, and then adjusts
Temperature of k-th of the calandria to described k-th thermal region heating to be added.K-th of calandria refers to appointing in heating device
One calandria of meaning.
Specifically, the structure of heating device 5 is as shown in figure 4, Fig. 4 is the structure of heating device in vacuum sintering furnace of the present invention
Schematic diagram.At present the type of furnace occur temperature deviation before, during and after upper and lower 6th area temperature deviation it is larger, therefore, can be by vacuum
Sintering furnace is divided into 6 area's computer heating controls.In figure by taking 3 groups of calandria groups as an example, A1 is first calandria in the first calandria group
First electrode stick, B1 are the second electrode stick of first calandria in the first calandria group；A4 is second in the first calandria group
The first electrode stick of a calandria；B4 is the second electrode stick of second calandria in the first calandria group；A2 is the second heating
The first electrode stick of first calandria in body group, B2 are the second electrode stick of first calandria in the second calandria group；A5
For the first electrode stick of second calandria in the second calandria group；B5 is second of second calandria in the second calandria group
Electrode bar；A3 is the first electrode stick of first calandria in third calandria group, and B3 adds for first in third calandria group
The second electrode stick of hot body；A6 is the first electrode stick of second calandria in third calandria group；B6 is third calandria group
In second calandria second electrode stick.Stove interior sealing case is divided into 6 region heated for controlling temperature by the above calandria group, and first adds
First calandria of hot body group carries out heated for controlling temperature to sealing upper box part, and the second calandria of the first calandria group is under seal box
Portion carries out heated for controlling temperature.Similarly, second, third calandria group carries out heated for controlling temperature to seal box corresponding region, before, during and after point
The upper and lower independent temperature control in 6th area, to realize the homogeneity of in-furnace temperature.
Certain type of furnace is bigger, and the design in region can increase, and the number of corresponding calandria group can increase.In addition, such as degreasing
The position heat leakage of mouth is larger, and air-flow has the tendency that convolution, causes degreasing mouth product size larger, and the defect etc. of appearance burnt hair can
It designs independent heating body and carries out region heating.Correspondingly, when the type of furnace is smaller, region heated for controlling temperature can be suitably reduced.
Fig. 5 is the circuit diagram of multiple calandria groups of heating device in vacuum sintering furnace of the present invention.As shown in figure 5,
It is powered by 6 single-phase transformers, heating power is controlled by corresponding power controller, each thermal region to be added has individual thermoelectricity
Even Thc carrys out feedback temperature PV values and calculates MV values to PID, PID according to current set temperature SV values and export to power controller, come
The output power of regulation power controller, the SV values for making PV value infinite approachs currently set.
It is as follows about the specific embodiment of the present invention：
Debugging detection can all be passed through before furnace body shipment, Temperature Distribution is necessary detection.
Example detects temperature, such as by sensor when set temperature is 800 DEG C in stove to 6 different locations in stove
Shown in Fig. 6, Fig. 6 is the distribution schematic diagram of the in-furnace temperature test point of the specific embodiment of the invention, and stain indicates test point, often
The temperature that a test point measures is as follows：
Point 1 is 800 DEG C, and point 2 is 810 DEG C, and point 3 is 795 DEG C, and point 4 is 800 DEG C, and point 5 is 805 DEG C, and point 6 is 790 DEG C.
At this point, point 1 is 800 DEG C, point 6 is 790 DEG C.
At this time if designed using upper and lower 2nd area temperature control, that is, two calandrias are used to heat, since this time point 1 and point 6 all exist
Lower area can not individually carry out temperature control adjustment.
At this time if using the temperature control design of 6th area, that is, 6 calandrias are used to heat, the reality that each area's thermocouple can will measure
Temperature (PV values) feeds back to PID, and PID can be compared with the temperature (SV values) of setting.When the temperature for finding point 3, putting 6 regions
Degree is less than 800 DEG C, can individually improve heating power to its region, increase the temperature (PV values) in this region until SV values；
And when finding point 2, putting the temperature of 5 regions higher than 800 DEG C, heating power will be individually reduced to its region, dropped
The temperature (PV values) in this low region is until SV values.By the monitoring respectively to different zones temperature in stove, with this independent control
The temperature of different zones processed.To make temperature uniformity reach best effect.
In conclusion when the volume of furnace body is identical, the region of independent temperature control is more, and the homogeneity of in-furnace temperature is got over
It is good.
Below by comparison difference with the prior art, to illustrate beneficial effects of the present invention：
It is more in the prior art to be heated for single area；Influence the factor of uniformity of temperature profile：
1. related with design, for example, furnace body volume size, volume is bigger, and temperature uniformity is more bad.Couple on furnace body
Heat leakage is larger etc. at mouthful position, such as pumping hole.Or somewhere has cooler heat leakage larger etc..
2. the discrepancy of the uniformity of thermal insulating material itself heat preservation.
3. heating uniformity, heater resistance itself also has the discrepancy of uniformity, graphite piece same material not necessarily resistance
It is worth identical
4. the airflow influence of different zones, up such as thermal current, general upper temp can be higher than temperature of lower.Also air-flow
Flow to factor.
The uniformity of temperature is maintained by the following in the prior art：
1. thermal insulating material uses the advanced material of import, increase heat-insulating property.
2. by the resistance of regulation heating material, such as front and back temperature difference is larger, passes through resistance value before and after adjusting.(this will be with
The heating material shape of actual design adjusts, and adjustment difficulty is larger)
3. reducing the type of furnace.By reducing heated perimeter, the uniformity of temperature can be improved.
Conclusion：
By above-mentioned method, the homogeneity of the temperature of the smaller type of furnace can be controlled in ＜ ± 5 DEG C at present, large-sized true
The homogeneity of the temperature of empty stove can be controlled in ＜ ± 10 DEG C.But since the cost of the above method is higher, adjustment difficulty compared with
Greatly, so needing to ensure temperature uniformity by new temperature control method.
The present invention：
1. multi-region temperature control realizes each regional temperature consistency by multi-region temperature control.
2. the different SV values of setting independently adjust each area's temperature consistency of control by PID.
3. simple in structure, region adds convenient.If the former type of furnace has 2nd area, the type of furnace to lengthen, 4th area are may be designed to.
4. bulk area of generating heat is big, if S-shaped designs, increases heating area, accelerate seal box heating rate, and temperature is equal
It is even.
5. heater cross-sectional area is smaller, relatively thin, compact to design, increase effective use space.
Effect：
1. making up the defect of thermal insulating material own temperature deviation, general thermal insulating material may be used to make up each area's temperature deviation
Defect.(requirement to thermal insulating material reduces)
2. the temperature difference is adjusted by adjusting the mode of resistance, adjustment is more difficult before.And every stove temperature difference is all different,
Adjustment is inconvenient.(without adjusting the temperature difference by the way of adjust resistance again)
3. the larger type of furnace of volume can realize the uniformity of temperature, the homogeneity of temperature can be controlled in ＜ ± 5
℃。
4. the temperature gap of the stove of same volume, different zones also significantly reduces.(in the identical stove of volume, solely
The region of vertical temperature control is more, and the temperature in furnace inner space is more uniform)
5. dynamic temperature response is good.
6. low temperature is adjustable consistent with high-temperature area difference.
7. it is output increased that full stove yield, which improves,.Subregion product size, carbon caused by temperature deviation before solution
Content, appearance and density problem not up to standard.
8. bulk area of generating heat is big, temperature radiation is evenly.
9. improving heating rate, shorten the heating process time.Save cost.
10. gaseous exchange is more apparent in the type of furnace of pressurizeing, the apparent temperature difference in region can be caused.It can solve the problems, such as this.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of calandria, which is characterized in that three adjacent sides of the calandria composition prism, the calandria include
First heating structure and the second heating structure；First heating structure includes first electrode stick, multiple first heating plates and more
A first jiao of connection sheet is connected by first jiao of connection sheet between two neighboring first heating plate, and described the
One jiao of connection sheet is located at the incline position of the prism, and first heating plate is located at the lateral location of the prism；Institute
The current output terminal for stating first electrode stick is connect with the first heating plate of the head end of first heating structure, the first electrode
The first end of the current input terminal of stick and the output end of single-phase transformer connects；
Second heating structure includes second electrode stick, multiple second heating plates and multiple second jiao of connection sheet, two neighboring
It is connected by second jiao of connection sheet between second heating plate, second jiao of connection sheet is located at the prism
Incline position, second heating plate is located at the lateral location of the prism, the current input terminal of the second electrode stick
Connect with the second heating plate of the head end of second heating structure, the current output terminal of the second electrode stick with it is described single-phase
The second end of the output end of transformer connects；
First heating plate of the end of first heating structure and the second heating plate of the end of second heating structure are logical
Long connection sheet connection；The single-phase transformer, first heating structure and second heating structure constitute current loop.
2. calandria according to claim 1, which is characterized in that the input terminal and power controller of the single-phase transformer
Output end connection, the control output end of the control signal of the power controller and PID controller connects, the PID's
PV input terminals are connect with the thermocouple being set in material to be heated body region, and the thermocouple is used for the calandria is corresponding
The measured temperature of heated material is transmitted to the PID controller, and the PID controller is used for by controlling the power control
The output power of device processed adjusts the heating temperature of the calandria to control the output power of the single-phase transformer.
3. calandria according to claim 1, which is characterized in that the current output terminal of the first electrode stick is equipped with spiral shell
Line is connect by nut with the first heating plate of the head end of first heating structure；The electric current of the second electrode stick inputs
End is equipped with screw thread, is connect with the second heating plate of the head end of second heating structure by nut.
4. calandria according to claim 1, which is characterized in that first heating plate and second heating plate are
Inner hollow, the laminated structure that edge is curve.
5. calandria according to claim 1, which is characterized in that first heating plate and second heating plate are
The rectangle laminated structure of inner hollow.
6. a kind of vacuum sintering furnace for realizing multizone temperature control, which is characterized in that the vacuum sintering furnace includes seal box, heating
Device and heat insulation cylinder；The seal box is prismatic, and the heat insulation cylinder is cylindrical or prismatic, the heating device setting
Between the heat insulation cylinder and the seal box；The heating device includes multiple calandria groups, and the multiple calandria group is equal
The even outside for being distributed in the seal box, is heated for the multiple regions to the seal box；
Each calandria group includes that two structures are identical and be looped around the calandria of the side of the seal box up and down；It is described
Calandria is distributed in three adjacent sides of the seal box, and the calandria includes the first heating structure and the second heating knot
Structure；The head end of first heating structure is connected with the first end of the output end of single-phase transformer, second heating structure
Head end is connected with the second end of the output end of the single-phase transformer, and the end of first heating structure is heated with described second
The end of structure is connected by long connection sheet；The single-phase transformer, first heating structure and second heating structure
Constitute current loop.
7. vacuum sintering furnace according to claim 6, which is characterized in that first heating structure includes first electrode
Stick, multiple first heating plates and multiple first jiao of connection sheet pass through one described between two neighboring first heating plate
One jiao of connection sheet connection, first jiao of connection sheet are located at the incline position of the prism, and first heating plate is located at institute
State the lateral location of prism；The current output terminal of the first electrode stick adds with the first of the head end of first heating structure
Backing connects, and the first end of the current input terminal of the first electrode stick and the output end of single-phase transformer connects；
Second heating structure includes second electrode stick, multiple second heating plates and multiple second jiao of connection sheet, two neighboring
It is connected by second jiao of connection sheet between second heating plate, second jiao of connection sheet is located at the prism
Incline position, second heating plate is located at the lateral location of the prism, the current input terminal of the second electrode stick
Connect with the second heating plate of the head end of second heating structure, the current output terminal of the second electrode stick with it is described single-phase
The second end of the output end of transformer connects.
8. vacuum sintering furnace according to claim 6, which is characterized in that the vacuum sintering furnace further includes multiple thermoelectricity
Even, multiple PID controllers and multiple power controllers；For k-th of calandria, the thermocouple and the PID controller
PV input terminals connect, for measuring the temperature of k-th of thermal region to be added of the corresponding seal box of k-th of calandria
Value is transmitted to the PID controller；The control output end of the PID controller and the control signal of the power controller connect
It connects, the input terminal connection of the output end of power controller single-phase transformer corresponding with k-th of calandria, for adjusting
The output power of the single-phase transformer is saved, and then adjusts k-th of calandria to described k-th thermal region heating to be added
Temperature.
9. vacuum sintering furnace according to claim 6, which is characterized in that the number of the calandria group be more than 1, for pair
The multiple regions of the vacuum sintering furnace are heated.
10. vacuum sintering furnace according to claim 6, which is characterized in that the vacuum sintering furnace further includes insulating materials,
For the heating device to be isolated with other parts in the vacuum sintering furnace.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283615.8A CN108458589B (en) | 2018-04-02 | 2018-04-02 | A kind of calandria and the vacuum sintering furnace for realizing multizone temperature control |
| PCT/CN2018/112582 WO2019192167A1 (en) | 2018-04-02 | 2018-10-30 | Heating body and vacuum sintering furnace for implementing multi-zone temperature control |
| JP2019521056A JP6935050B2 (en) | 2018-04-02 | 2018-10-30 | Vacuum sintering furnace capable of heating body and multi-region temperature control |
| JP2021001232U JP3232568U (en) | 2018-04-02 | 2021-04-02 | Vacuum sintering furnace capable of heating body and multi-region temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283615.8A CN108458589B (en) | 2018-04-02 | 2018-04-02 | A kind of calandria and the vacuum sintering furnace for realizing multizone temperature control |
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| Publication Number | Publication Date |
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| CN108458589A true CN108458589A (en) | 2018-08-28 |
| CN108458589B CN108458589B (en) | 2019-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810283615.8A Active CN108458589B (en) | 2018-04-02 | 2018-04-02 | A kind of calandria and the vacuum sintering furnace for realizing multizone temperature control |
Country Status (3)
| Country | Link |
|---|---|
| JP (2) | JP6935050B2 (en) |
| CN (1) | CN108458589B (en) |
| WO (1) | WO2019192167A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109732091A (en) * | 2019-03-01 | 2019-05-10 | 宁波恒普真空技术有限公司 | A kind of pressure sintering furnace and its divided section heater |
| WO2019192167A1 (en) * | 2018-04-02 | 2019-10-10 | 宁波恒普真空技术有限公司 | Heating body and vacuum sintering furnace for implementing multi-zone temperature control |
| WO2021227126A1 (en) * | 2020-05-09 | 2021-11-18 | 宁波恒普真空技术有限公司 | Heating body, and vacuum furnace with multi-region temperature control |
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| CN108458589B (en) * | 2018-04-02 | 2019-10-29 | 宁波恒普真空技术有限公司 | A kind of calandria and the vacuum sintering furnace for realizing multizone temperature control |
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2018
- 2018-04-02 CN CN201810283615.8A patent/CN108458589B/en active Active
- 2018-10-30 WO PCT/CN2018/112582 patent/WO2019192167A1/en active Application Filing
- 2018-10-30 JP JP2019521056A patent/JP6935050B2/en active Active
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| JPH09229561A (en) * | 1996-02-22 | 1997-09-05 | Kobe Steel Ltd | Lateral pressurizing sintering furnace |
| CN101483943A (en) * | 2009-02-20 | 2009-07-15 | 苏州汇科机电设备有限公司 | Radiation type heating board structure for electronic product annealing and sintering furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019192167A1 (en) * | 2018-04-02 | 2019-10-10 | 宁波恒普真空技术有限公司 | Heating body and vacuum sintering furnace for implementing multi-zone temperature control |
| CN109732091A (en) * | 2019-03-01 | 2019-05-10 | 宁波恒普真空技术有限公司 | A kind of pressure sintering furnace and its divided section heater |
| CN109732091B (en) * | 2019-03-01 | 2023-09-08 | 宁波恒普技术股份有限公司 | Pressure sintering furnace and partition heating device thereof |
| WO2021227126A1 (en) * | 2020-05-09 | 2021-11-18 | 宁波恒普真空技术有限公司 | Heating body, and vacuum furnace with multi-region temperature control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6935050B2 (en) | 2021-09-15 |
| CN108458589B (en) | 2019-10-29 |
| WO2019192167A1 (en) | 2019-10-10 |
| JP2020521268A (en) | 2020-07-16 |
| JP3232568U (en) | 2021-06-24 |
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