CN107120961B - Dewaxing device for sintering furnace - Google Patents
Dewaxing device for sintering furnace Download PDFInfo
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- CN107120961B CN107120961B CN201710424151.3A CN201710424151A CN107120961B CN 107120961 B CN107120961 B CN 107120961B CN 201710424151 A CN201710424151 A CN 201710424151A CN 107120961 B CN107120961 B CN 107120961B
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- dewaxing
- dewaxing device
- forming agent
- collecting
- air inlet
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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
- F27B5/04—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a dewaxing device of a sintering furnace, which comprises a first dewaxing device and an air inlet structure arranged between the first dewaxing device and a furnace body of the sintering furnace; a cold-heat exchange slow-flow device for carrying out slow-flow treatment on the gas forming agent is arranged in the first dewaxing device, and the cold-heat exchange slow-flow device is arranged close to an air inlet of the first dewaxing device; the dewaxing device of the sintering furnace has good liquefying effect, can more effectively collect the forming agent in the product, and further ensures the product quality.
Description
Technical Field
The invention relates to the field of heat treatment, in particular to a dewaxing device of a sintering furnace.
Background
A sintering furnace is a heat treatment furnace that can provide a material with a specific temperature and a specific ambient pressure and vacuum, and generally comprises: the device comprises a vacuum device, a heating and heat preserving device, a process gas device, a cooling device (circulating water cooling, pressure quick cooling and the like), a control device and a dewaxing device, wherein the dewaxing device is used for collecting a forming agent added into a product. For better shaping of the product, it is often necessary to add a shaping agent to the product, but the shaping agent, if left in the product, can affect the quality of the product. The forming agent is in a gasification state under the high temperature condition, the gasified forming agent is extracted by the vacuum pump group to perform directional movement, and the collecting and storing of the forming agent are completed by the dewaxing device. In the existing dewaxing device, the forming agent in the product cannot be completely collected, so that a part of the forming agent remains on the product, and the quality of the product is greatly affected.
For this reason, chinese patent document CN 201620096466.0 discloses a dewaxing device for a pressure sintering furnace, in which a gaseous forming agent is liquefied for the first time by a first dewaxing horizontal tube, and is stored in a dewaxing storage box after being cooled by a cooling device, and the remaining gaseous forming agent is liquefied again by a dewaxing vertical tube and is finally liquefied by a second dewaxing horizontal tube, wherein, inner cavities of the first dewaxing horizontal tube, the dewaxing vertical tube and the second dewaxing horizontal tube are filled with pall rings, which are used for increasing the contact area between gas and the device, improving the liquefying efficiency of the forming agent gas, thereby completing collection and storage of the forming agent.
However, the pressure sintering furnace dewaxing apparatus described in the above patent document has at least the following disadvantages: the first dewaxing horizontal pipe, the dewaxing vertical pipe and the inner cavity of the second dewaxing horizontal pipe of the dewaxing device of the pressure sintering furnace are filled with pall rings to improve the liquefying efficiency of the gaseous forming agent, however, the liquefying effect of the pall rings is not good, and the quality of products is affected to a certain extent.
Therefore, there is a need to provide a dewaxing device of a sintering furnace, which has good liquefying effect, can collect the forming agent in the product more effectively, and further ensures the product quality.
Disclosure of Invention
The invention aims to provide a novel sintering furnace dewaxing device which can effectively collect a forming agent in a product and further ensure the quality of the product.
In order to achieve the above object, the present invention provides a novel dewaxing device for a sintering furnace, wherein the novel dewaxing device for a sintering furnace comprises a first dewaxing device and an air inlet structure arranged between the first dewaxing device and a furnace body of the sintering furnace; the first dewaxing device is internally provided with a cold-heat exchange slow-flow device for carrying out slow-flow treatment on the gas forming agent, and the cold-heat exchange slow-flow device is arranged close to an air inlet of the first dewaxing device.
Preferably, the cold-heat exchange slow flow device comprises a plurality of slow flow plates, cold heat exchange tubes which are connected with the slow flow plates in series into a whole, and fluid flowing in the cold heat exchange tubes; during dewaxing, introducing cold fluid into the cold heat exchange tube, wherein the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent; during wax removal, hot fluid is introduced into the cold-heat exchange tube, and the temperature of the hot fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
Preferably, the cold-heat exchanging tube includes a first tube passing through the slow flow plate, a second tube, and an intermediate tube connecting the first tube and the second tube; the length direction of the first pipeline and the second pipeline is consistent with the length direction of the first dewaxing device.
Preferably, the device further comprises a second dewaxing device, wherein the second dewaxing device is vertically arranged and perpendicular to the first dewaxing device, and the inner cavity of the second dewaxing device is communicated with the inner cavity of the first dewaxing device.
Preferably, a two-way elbow structure is further arranged in the inner cavity of the first dewaxing device, the vertical end of the two-way elbow structure is communicated with the inner cavity of the second dewaxing device, and the horizontal end of the two-way elbow structure extends from one end of the inner cavity of the first dewaxing device to the end wall of one end of the air inlet of the first dewaxing device; the horizontal end is arranged along the length direction of the first dewaxing device and is positioned above the air inlet of the first dewaxing device.
Preferably, the slow flow plate is crescent and the inner side is fixedly arranged on the outer wall of the bottom of the horizontal end of the two-way bent pipe structure.
Preferably, the air inlet structure comprises a first dewaxing pipe, a second dewaxing pipe and a dewaxing valve arranged between the first dewaxing pipe and the second dewaxing pipe, wherein the first dewaxing pipe is communicated with the furnace body, and the second dewaxing pipe is communicated with an air inlet of the first dewaxing device.
Preferably, jackets are sleeved outside the first dewaxing pipe and the second dewaxing pipe, and fluid is arranged in the jackets; during dewaxing, introducing cold fluid, wherein the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent; and when wax is removed, introducing a hot fluid, wherein the temperature of the hot fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
Preferably, a wax removing ball valve for discharging the liquid forming agent is arranged at the lower part of the first dewaxing device.
The forming agent collecting structure is arranged between the furnace body and the first dewaxing device; the forming agent collecting structure comprises a collecting cylinder arranged between the furnace body and the first dewaxing device and an anti-solidification structure for preventing solidification of the liquid forming agent in the collecting cylinder.
The anti-solidification structure comprises a heating cylinder sleeved outside the collecting cylinder and fluid circulating in the heating cylinder, wherein the temperature of the fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
The device also comprises a filtering device, wherein the filtering device comprises at least two groups of filtering structures which are arranged between the second dewaxing device and the air extracting pump and are connected in parallel, and at least two groups of control structures which are connected in parallel; the control structure is used for controlling the opening and closing of the corresponding filtering structure and the second dewaxing device, and the filtering structure is used for filtering the forming agent in the gas discharged by the second dewaxing device.
The filter structure comprises a filter cylinder with an inner cavity, an air inlet formed on the filter cylinder and communicated with the inner cavity, an air outlet formed at the end part of the lower end of the filter cylinder, and a filter element detachably arranged in the inner cavity; the inner cavity of the filter element is communicated with the air outlet of the filter element, and air in the inner cavity of the filter element enters the inner cavity of the filter element through the peripheral wall of the filter element and is discharged from the air outlet of the filter element.
Compared with the prior art, the invention has the following advantages:
the sintering furnace dewaxing device comprises a first dewaxing device and an air inlet structure arranged between the first dewaxing device and a furnace body of the sintering furnace; a cold-heat exchange slow-flow device for carrying out slow-flow treatment on the gas forming agent is arranged in the first dewaxing device, and the cold-heat exchange slow-flow device is arranged close to an air inlet of the first dewaxing device; when the gaseous forming agent enters the first dewaxing device, the cold-heat exchange slow flow device enables the gaseous forming agent to stay in the first dewaxing device for a longer time, so that the gaseous forming agent which stays in the first dewaxing device in a liquefied mode is more, the liquefying effect of the sintering furnace dewaxing device is improved, the forming agent is collected more effectively, and the product quality is further guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a dewaxing apparatus for a sintering furnace according to example 1 of the present invention;
FIG. 2 is a schematic view of a portion of a dewaxing apparatus of a sintering furnace according to example 1 of the present invention;
FIG. 3 is a schematic view showing a collecting structure of a molding agent according to example 2 of the present invention;
FIG. 4 is a schematic view of a portion of a forming agent collection structure according to example 2 of the present invention;
FIG. 5 is a block diagram showing a molding agent collecting apparatus according to example 2 of the present invention;
FIG. 6 is a schematic diagram of a filtration apparatus suitable for use in a dewaxing system according to example 3 of the present invention;
FIG. 7 is a schematic view showing a filtering structure according to embodiment 3 of the present invention;
FIG. 8 is a schematic illustration of a filter cartridge according to example 3 of the present invention;
description of the reference numerals
1-a first dewaxing tube; 2-dewaxing valve; 3-a second dewaxing tube; 4-a cold-heat exchange slow flow device; 5-a first dewaxing unit; 6-a wax removal ball valve; 7-a second dewaxing unit; 8-pump set air extraction stop valve; 9-a two-way bent pipe structure; 10-slow flow plates; 11-cold heat exchange tubes; 12-jacket; 13-air inlet; 14-vertical ends; 15-horizontal ends; 1 a-a separator; 2 a-a collection cylinder; 3 a-heating cylinder 4 a-first locking nut; 5 a-a second lock nut; 6 a-a screw; 7 a-a support base; 8 a-collecting air inlet; 9 a-a collection air outlet; 10 a-an inlet dewaxing tube; 12a, a furnace body; 14 a-ear panels; 15 a-discharge port; 2 b-a filtration structure; 3 b-control structure; 4 b-a cylinder; 5 b-air inlet; 6 b-an air outlet; 7 b-a filter element; 8 b-cover plate; 9 b-a caliper bolt; 10 b-handle; 11 b-an air pump; 12 b-bellows; 13 b-an intermediate screw.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a dewaxing device of a sintering furnace, wherein the dewaxing device of the sintering furnace comprises a first dewaxing device 5 and an air inlet structure arranged between the first dewaxing device and a furnace body of the sintering furnace; the first dewaxing device 5 is internally provided with a cold-heat exchange slow flow device 4 for carrying out slow flow treatment on the gas forming agent, and the cold-heat exchange slow flow device 4 is arranged close to an air inlet 13 of the first dewaxing device 5.
As a preferred implementation manner of this embodiment, the cold-heat exchange slow flow device 4 includes a plurality of slow flow plates 10, cold heat exchange tubes 11 integrally connected with the slow flow plates 10 in series, and fluid flowing in the cold heat exchange tubes 11; during dewaxing, cold fluid is introduced into the cold heat exchange tube 11, and the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent; during wax removal, the cold heat exchange tube 11 is filled with a hot fluid, the temperature of which is higher than the solidification temperature of the molding agent and lower than the vaporization temperature of the molding agent.
As a preferred embodiment of the present embodiment, the heat exchange cold pipe 11 includes a first pipe, a second pipe, and an intermediate pipe connecting the first pipe and the second pipe, which pass through the slow flow plate 10; the length direction of the first pipeline and the second pipeline is consistent with the length direction of the first dewaxing device.
As described above, the sintering furnace dewaxing device comprises the first dewaxing device 5 and an air inlet structure arranged between the first dewaxing device 5 and the furnace body of the sintering furnace; a cold-heat exchange slow flow device 4 for carrying out slow flow treatment on the gas forming agent is arranged in the first dewaxing device 5, and the cold-heat exchange slow flow device 4 is arranged close to an air inlet 13 of the first dewaxing device 5; because the cold-heat exchange slow flow device 4 is arranged near the air inlet 13 of the first dewaxing device 5, the time that the gaseous forming agent stays in the first dewaxing device 5 is prolonged under the action of the cold-heat exchange slow flow device 4 after entering the first dewaxing device 5, and the liquefying effect is better.
Specifically, at the time of dewaxing, a cold fluid is passed through the cold heat exchange tube 11, and the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent, so that more gaseous forming agent can be liquefied; when the wax is removed, hot fluid is introduced into the cold heat exchange tube 11, the temperature of the hot fluid is higher than the solidification temperature of the forming agent, the liquefied forming agent can be prevented from being continuously solidified, the liquid forming agent can be ensured to flow out better, and the liquefied forming agent is prevented from being remained in the first dewaxing device 5; in conclusion, the cold-heat exchange slow flow device 4 arranged in the sintering furnace dewaxing device enables the liquefied gaseous forming agent to stay in the device to be more, so that the liquefying effect of the sintering furnace dewaxing device is improved, the forming agent can be collected more effectively, and the product quality is further ensured.
As a preferred implementation manner of this embodiment, the device further comprises a second dewaxing device 7, wherein the second dewaxing device 7 is vertically arranged and perpendicular to the first dewaxing device 5, and an inner cavity of the second dewaxing device 7 is mutually communicated with an inner cavity of the first dewaxing device 5.
Specifically, the jacket 12 is sleeved outside the second dewaxing device 7, cold fluid is passed through the jacket 12, and can play a role in cooling, preferably, the cold fluid can be cold water, cold oil or cold air, but not limited to, and all cold fluids capable of realizing the same function are within the scope of protection of the embodiment; in addition, the pall ring is arranged in the second dewaxing device 7, so that the contact area between the gaseous forming agent and the sintering furnace dewaxing device can be increased, the slow flow effect is achieved, and the liquefying effect of the forming agent is improved.
As a preferred implementation manner of this embodiment, a two-way elbow structure 9 is further disposed in the inner cavity of the first dewaxing device 5, a vertical end 14 of the two-way elbow structure 9 is communicated with the inner cavity of the second dewaxing device 7, and a horizontal end 15 of the two-way elbow structure 9 extends from one end of the inner cavity of the first dewaxing device 5 to an end wall of one end of the air inlet 13 of the first dewaxing device 5; wherein the horizontal end 15 is disposed along the length direction of the first dewaxing device 5 and above the air inlet 13 of the first dewaxing device 5.
As a preferred embodiment of the present embodiment, the slow flow plate 10 is crescent-shaped and is fixedly mounted on the bottom outer wall of the horizontal end 15 of the two-way elbow structure 9.
Specifically, the two-way elbow structure 9 is located above the air inlet 13 of the first dewaxing device 5, so that the flow path of the gaseous forming agent in the first dewaxing device 5 can be prolonged, in addition, the crescent slow flow plate 10 fixed on the outer wall of the two-way elbow structure 9 can increase the cooling area, meanwhile, the flow velocity of the gaseous forming agent in the first dewaxing device 5 can be slowed down, the liquefying time of the gaseous forming agent is increased, and the liquefying effect of the gaseous forming agent is further improved.
As a preferred embodiment of this example, the air intake structure includes a first dewaxing pipe 1, a second dewaxing pipe 3, and a dewaxing valve 2 disposed therebetween, wherein the first dewaxing pipe 1 is in communication with the furnace body, and the second dewaxing pipe 3 is in communication with an air inlet 13 of the first dewaxing device 5.
As a preferred embodiment of this example, a jacket 12 is sleeved outside the first dewaxing pipe 1 and the second dewaxing pipe 3, and a fluid is arranged in the jacket 12; during dewaxing, introducing cold fluid, wherein the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent; and when wax is removed, introducing a hot fluid, wherein the temperature of the hot fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
Preferably, the cold fluid may be a cold liquid or a cold gas, and the hot fluid may be a hot liquid or a hot gas, in particular, the cold liquid may be cold oil, cold water, the cold gas may be cold gas, the hot liquid may be hot oil, hot water, and the hot gas may be hot gas; but not limited to this, all cold and hot fluids that can achieve the same function are within the scope of the present embodiment; during dewaxing, introducing cold fluid, wherein the temperature of the cold fluid is lower than the liquefying temperature of the forming agent, and the gaseous forming agent is primarily liquefied under the action of the cold fluid; when the wax is removed, hot fluid is introduced, the temperature of the hot fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent, and the liquefied forming agent can be prevented from being further solidified.
Preferably, the first dewaxing pipe 1 is higher than the dewaxing valve 2, and the dewaxing valve 2 is higher than the second dewaxing pipe 3, so that the forming agent after preliminary liquefaction in the air inlet structure flows to the first dewaxing device 5 for storage.
In a preferred embodiment of the present embodiment, a wax-removing ball valve 6 for discharging the liquid molding agent is provided at the lower part of the first dewaxing device.
Specifically, the wax removing ball valve 6 is set to be an automatic wax removing ball valve 6, so that the liquid forming agent can be timely and conveniently discharged.
It should be noted that, when the sintering furnace dewaxing device provided by the technical scheme of the embodiment is specifically implemented, two dewaxing states of positive pressure and negative pressure may occur in the dewaxing system according to the magnitude of the input flow of the processing gas and the vacuum pump set, and the two states are related to the sintering dewaxing process, but the dewaxing principle and efficiency of the system are the same.
Example 2
Referring to fig. 3 and 4, on the basis of embodiment 1, the present embodiment further provides a forming agent collecting structure, wherein the forming agent collecting structure includes a collecting cylinder 2a and an air inlet dewaxing pipe 10a communicating with a furnace body 12a, and further includes an anti-solidification structure for preventing solidification of the liquid forming agent in the collecting cylinder 2 a.
As described above, the forming agent collecting structure includes the collecting cylinder 2a and the inlet dewaxing pipe 10a communicating with the furnace body, and further includes the solidification preventing structure for preventing solidification of the liquid forming agent in the collecting cylinder 2 a; in the process of collecting the forming agent, the gaseous forming agent enters the air inlet dewaxing pipe 10a from the furnace body, the temperature in the air inlet dewaxing pipe 10a is lower than the temperature in the furnace body, part of the gaseous forming agent flows into the collecting cylinder 2a after being liquefied due to the temperature reduction, and the solidification preventing structure can keep the temperature in the collecting cylinder 2a and prevent the liquid forming agent stored in the collecting cylinder 2a from being further solidified due to the temperature reduction, so that the effect of collecting the forming agent is better.
As a preferred embodiment of the present embodiment, the anti-solidification structure includes a heating cylinder 3a sleeved outside the collecting cylinder 2a, and a fluid flowing in the heating cylinder 3a, wherein the temperature of the fluid is higher than the solidification temperature of the molding agent and lower than the vaporization temperature of the molding agent.
Specifically, the fluid is provided in the heating cylinder 3a to maintain the temperature in the collecting cylinder 2a, and the fluid may be a liquid (hot oil, hot water) having a temperature higher than the solidification temperature of the molding agent and lower than the vaporization temperature of the molding agent, or a gas (hot gas) having a temperature higher than the solidification temperature of the molding agent and lower than the vaporization temperature of the molding agent, but the present embodiment is not limited thereto, and the fluid capable of realizing the same function is within the scope of the present embodiment.
As a preferred embodiment of this embodiment, an annular U-shaped cavity is formed between the inner wall of the heating cylinder 3a sleeved outside the collecting cylinder 2a and the outer wall of the collecting cylinder 2 a.
Specifically, the annular U-shaped cavity can maximize the contact area between the heating cylinder 3a and the collecting cylinder 2a, and ensure that the fluid in the heating cylinder 3a is fully contacted with the collecting cylinder 2a, so that the optimal heating effect is achieved.
As a preferred embodiment of the present embodiment, a collecting air inlet 8a and a collecting air outlet 9a are formed at an upper end of the collecting cylinder 2a, the collecting air inlet 8a communicates with the air inlet dewaxing pipe 10a, and a discharge port 15a for discharging the liquid forming agent is formed at a lower end of the collecting cylinder 2 a.
As a preferred embodiment of the present embodiment, at least one partition plate 1a is further provided between the collection air inlet 8a and the collection air outlet 9a.
Specifically, the gas inlet dewaxing pipe 10a connects the collecting cylinder 2a and the furnace body 12a through the collecting gas inlet 8a, the gaseous forming agent in the furnace body 12a passes through the gas inlet dewaxing pipe 10a under the pumping action of the pump group, part of the gaseous forming agent flows into the collecting cylinder 2a after being liquefied, in order to avoid that the other part of the gaseous forming agent is prevented from being directly pumped out through the collecting gas outlet 9a after entering the collecting cylinder 2a, the retention time of the gaseous forming agent in the collecting cylinder 2a is influenced, and thus the collecting effect is influenced, the baffle plate 1a is arranged to block the gaseous forming agent entering the collecting cylinder 2 a; preferably, the partition plate 1a includes a first partition plate disposed between the collection air inlet 8a and the collection air outlet 9a at a position close to the collection air inlet 8a, and a second partition plate disposed between the collection air inlet 8a and the collection air outlet 9a at a position close to the collection air outlet 9a, and partially shielding the collection air outlet 9a.
As a preferred implementation of this embodiment, an adjusting support structure for adjusting the height of the collection cylinder 2a is also included.
As a preferred implementation manner of this embodiment, the adjusting and supporting structure includes a supporting seat 7a, a screw rod 6a provided on the supporting seat 7a, an ear plate 14a provided on the outer wall of the heating cylinder 3a and having a through hole, a first locking nut 4a, and a second locking nut 5a; the screw rod 6a sequentially penetrates through the first locking nut 4a, the through hole and the second locking nut 5a, and the height of the collecting cylinder is adjusted under the threaded fit of the first locking nut 4a and the second locking nut 5a.
Specifically, the height of the molding agent collecting device can be adjusted by adjusting the first locking nut 4a and the second locking nut 5a, that is, the molding agent collecting device is flexible and convenient to use.
Referring to fig. 5, the present embodiment provides a forming agent collecting device with the forming agent collecting structure, which includes a first dewaxing device 5, a forming agent collecting structure, and a second dewaxing tube 3 disposed between the first dewaxing device 5 and the forming agent collecting structure, wherein the forming agent collecting structure is the forming agent collecting structure.
As a preferred embodiment of this example, one end of the second dewaxing pipe 3 is connected to the collecting air outlet 9a of the forming agent collecting structure, and the other end of the second dewaxing pipe 3 is connected to the air inlet end of the first dewaxing device 5; wherein the air inlet end is higher than the collecting air outlet 9a.
As described above, the forming agent collecting apparatus includes the first dewaxing apparatus 5, the forming agent collecting structure, and the second dewaxing pipe 3 provided between the first dewaxing apparatus and the forming agent collecting structure, in the process of collecting the forming agent, part of the gaseous forming agent is liquefied for the first time while passing through the intake dewaxing pipe 10a, the other part of the gaseous forming agent passes through the second dewaxing pipe 3 to reach the first dewaxing apparatus 5, and is further liquefied into the liquid forming agent in the first dewaxing apparatus 5 through filtration and cooling, and since the intake end of the first dewaxing apparatus 5 is higher than the collecting outlet 9a of the forming agent structure, the forming agent further liquefied in the first dewaxing apparatus 5 is returned to the collecting cylinder 2a along the inner wall surface of the second dewaxing pipe 3, and this buffering process ensures that the forming agent collecting apparatus can collect the forming agent better and more effectively.
Example 3
As shown in fig. 6 and 7, the present embodiment further provides a filtering apparatus suitable for a dewaxing system, which includes at least two sets of filtering structures 2b connected in parallel with each other and at least two sets of control structures 3b connected in parallel with each other, which are provided between the second dewaxing apparatus 7 and the suction pump 11 b; the control structure 3b is configured to control the opening and closing of the filtering structure 2b and the second dewaxing device 7, and the filtering structure 2b filters the forming agent in the gas discharged from the second dewaxing device 7.
In this embodiment, the filtering structure 2b is provided to filter the exhaust gas from the second dewaxing device 7, so as to prevent the gas entering the air pump 11b from being mixed with a forming agent, and ensure the purity of the air intake of the air pump 11 b; meanwhile, a plurality of groups of filtering structures 2b and control structures 3b are arranged, and in the actual use process, the control structures 3b control the use of a plurality of groups or only one group of filtering structures 2b to filter the exhaust gas of the second dewaxing device 7, so that the use flexibility and the service life of the filtering device are improved.
In this embodiment, as a preferred embodiment, the filtering structure 2b and the control structure 3b are both provided in two groups; the control structure 3b comprises a pneumatic ball valve arranged between the second dewaxing device 7 and the filter structure 2 b. Namely, the pneumatic ball valves are used for controlling the connection or disconnection between the corresponding filtering structures 2b and the second dewaxing device 7, when only one filtering structure 2b is needed for filtering, one pneumatic ball valve is selected to be closed and the other pneumatic ball valve is selected to be opened, and when two filtering structures 2b are needed for filtering, two pneumatic ball valves are started simultaneously.
Specifically, as shown in fig. 7 and 8, the filter structure 2b includes a filter cartridge having an inner cavity, an air inlet 5b formed on the filter cartridge and communicating with the inner cavity, an air outlet 6b formed at a lower end portion of the filter cartridge, and a filter cartridge 7b detachably mounted in the inner cavity; the inner cavity of the filter element 7b is communicated with the air outlet 6b of the filter cartridge, and air in the inner cavity of the filter cartridge enters the inner cavity of the filter element 7b through the peripheral wall of the filter element 7b and is discharged from the air outlet 6b of the filter cartridge.
Further, the filter element 7b is detachably mounted in the filter cartridge by a middle screw 13b fixedly arranged in the inner cavity of the filter cartridge and a fixing nut.
In this embodiment, the exhaust gas from the second dewaxing device 7 passes through the pneumatic ball valve and then enters the inner cavity of the filter cartridge through the air inlet 5b, then enters the inner cavity of the filter cartridge 7b through the inner cavity of the filter cartridge, at this time, the forming agent in the exhaust gas is filtered by the filter cartridge 7b, and the gas in the inner cavity of the filter cartridge 7b is the filtered pure gas, and then enters the air pump 11b after being discharged through the air outlet 6b, so as to enter the subsequent treatment process.
Further, a bellows 12b is further provided between the filtering structure 2b and the suction pump 11b, so as to prevent vibration generated during operation of the suction pump 11b from being transferred to the filtering structure 2b to affect sealing performance at each connection position. Among them, the suction pump 11b is preferably a roots pump.
As shown in fig. 8, the filter cartridge includes a cylinder body 4b, a cover plate 8b disposed at an upper end of the cylinder body 4b, and a fixing structure for detachably fixing the cover plate 8b and the cylinder body 4 b. Specifically, the fixing structure comprises at least two first clamping grooves formed on the upper end flange of the cylinder 4b, at least two second clamping grooves formed on the cover plate 8b, and at least two clamping bolts 9b which are clamped with the first clamping grooves and the second clamping grooves in a one-to-one correspondence manner. In this embodiment, the cover plate 8b is detachably connected to the cylinder 4b, and the filter element 7b is detachably mounted in the cylinder 4 b.
Meanwhile, in order to facilitate the disassembly of the cover plate 8b, a handle 10b which is convenient for carrying is arranged on the cover plate 8 b.
The above embodiments are merely examples for clarity of illustration and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. The sintering furnace dewaxing device comprises a first dewaxing device (5) and an air inlet structure arranged between the first dewaxing device (5) and a furnace body of the sintering furnace; the device is characterized in that a cold-heat exchange slow flow device (4) for carrying out slow flow treatment on a gas forming agent is arranged in the first dewaxing device (5), and the cold-heat exchange slow flow device (4) is arranged close to an air inlet (13) of the first dewaxing device (5);
the sintering furnace dewaxing device also comprises a forming agent collecting structure arranged between the furnace body (12 a) and the first dewaxing device (5); the forming agent collecting structure comprises a collecting cylinder (2 a) arranged between the furnace body (12 a) and the first dewaxing device (5) and an anti-solidification structure for preventing solidification of the liquid forming agent in the collecting cylinder (2 a), wherein a collecting air inlet (8 a) and a collecting air outlet (9 a) are formed at the upper end of the collecting cylinder (2 a);
the forming agent collecting structure further comprises an air inlet dewaxing pipe (10 a) communicated with the furnace body, the air inlet dewaxing pipe (10 a) is communicated with the collecting air inlet (8 a), and at least one partition plate (1 a) is further arranged between the collecting air inlet (8 a) and the collecting air outlet (9 a).
2. The sintering furnace dewaxing device according to claim 1, wherein the cold-heat exchange slow flow device (4) comprises a plurality of slow flow plates (10), cold heat exchange tubes (11) which connect the slow flow plates (10) in series into a whole, and fluid flowing in the cold heat exchange tubes (11); during dewaxing, introducing cold fluid into the cold heat exchange tube (11), wherein the temperature of the cold fluid is lower than the liquefaction temperature of the forming agent; during wax removal, hot fluid is introduced into the cold heat exchange tube (11), and the temperature of the hot fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
3. The sintering furnace dewaxing apparatus according to claim 2, wherein the cold heat exchanging pipe (11) includes a first pipe, a second pipe, and an intermediate pipe connecting the first pipe and the second pipe, which pass through the slow flow plate (10); the length direction of the first pipeline and the second pipeline is consistent with the length direction of the first dewaxing device.
4. A sintering furnace dewaxing device according to claim 3, further comprising a second dewaxing device (7), wherein the second dewaxing device (7) is arranged vertically and perpendicular to the first dewaxing device (5), and wherein the inner cavity of the second dewaxing device (7) is in communication with the inner cavity of the first dewaxing device (5).
5. The sintering furnace dewaxing device according to claim 4, wherein a two-way elbow structure (9) is further arranged in the inner cavity of the first dewaxing device (5), the vertical end (14) of the two-way elbow structure (9) is communicated with the inner cavity of the second dewaxing device (7), and the horizontal end (15) of the two-way elbow structure (9) extends from one end of the inner cavity of the first dewaxing device (5) to the end wall of one end of the air inlet (13) of the first dewaxing device (5); the horizontal end (15) is arranged along the length direction of the first dewaxing device (5) and is positioned above the air inlet (13) of the first dewaxing device (5).
6. The sintering furnace dewaxing device according to claim 5, wherein the slow flow plate (10) is crescent shaped and is fixedly mounted on the bottom outer wall of the horizontal end (15) of the two-way elbow structure (9) on the inner side.
7. The sintering furnace dewaxing device according to claim 1, wherein the anti-solidification structure comprises a heating cylinder (3 a) sleeved outside the collecting cylinder (2 a) and a fluid circulating in the heating cylinder (3 a), wherein the temperature of the fluid is higher than the solidification temperature of the forming agent and lower than the gasification temperature of the forming agent.
8. The sintering furnace dewaxing device according to claim 1, further comprising a filtering device comprising at least two sets of filter structures (2 b) arranged in parallel with each other between the second dewaxing device (7) and the suction pump (11 b), and at least two sets of control structures (3 b) arranged in parallel with each other; the control structure (3 b) is used for controlling the corresponding filtering structure (2 b) and the second dewaxing device (7) to be opened and closed, and the filtering structure (2 b) is used for filtering the forming agent in the gas discharged by the second dewaxing device (7).
9. A fritted furnace dewaxing apparatus according to claim 8 wherein the filter structure (2 b) comprises a filter cartridge having an inner cavity, an air inlet (5 b) formed in the filter cartridge and communicating with the inner cavity, an air outlet (6 b) formed in the lower end of the filter cartridge, and a filter cartridge (7 b) removably mounted in the inner cavity; the inner cavity of the filter element (7 b) is communicated with the air outlet (6 b) of the filter cartridge, and air in the inner cavity of the filter cartridge enters the inner cavity of the filter element (7 b) through the peripheral wall of the filter element (7 b) and is discharged from the air outlet (6 b) of the filter cartridge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710424151.3A CN107120961B (en) | 2017-06-07 | 2017-06-07 | Dewaxing device for sintering furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710424151.3A CN107120961B (en) | 2017-06-07 | 2017-06-07 | Dewaxing device for sintering furnace |
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| CN107120961A CN107120961A (en) | 2017-09-01 |
| CN107120961B true CN107120961B (en) | 2023-07-21 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108941551B (en) * | 2018-05-28 | 2020-04-03 | 遵义中铂硬质合金有限责任公司 | Dewaxing pre-burning furnace |
| CN108705082B (en) * | 2018-05-31 | 2020-01-17 | 遵义中铂硬质合金有限责任公司 | Forming agent removing device |
| CN112556405B (en) * | 2020-12-14 | 2022-06-03 | 株洲瑞德尔智能装备有限公司 | Sintering furnace dewaxing structure and sintering furnace |
| CN113587649B (en) * | 2021-07-29 | 2023-05-09 | 株洲瑞德尔智能装备有限公司 | Dewaxing device of sintering furnace |
| CN114705047A (en) * | 2022-04-02 | 2022-07-05 | 株洲瑞德尔智能装备有限公司 | Dewaxing device for sintering furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201187948Y (en) * | 2008-03-20 | 2009-01-28 | 新日兴股份有限公司 | Wax-collecting apparatus arranged in a vacuum degreasing fritting furnace |
| CN201909519U (en) * | 2010-12-28 | 2011-07-27 | 株洲硬质合金集团有限公司 | Secondary wax collector of dewaxing and sintering integration furnace |
| CN203364596U (en) * | 2013-06-03 | 2013-12-25 | 厦门至隆真空科技有限公司 | Sintering furnace dewaxing device |
| CN205316944U (en) * | 2016-01-29 | 2016-06-15 | 湖南天源工业设备有限公司 | Pressure fritting furnace dewaxing device |
| CN205664684U (en) * | 2016-05-30 | 2016-10-26 | 马鞍山市恒利达机械刀片有限公司 | Carbide roller shear is fritting furnace for sword |
| CN207095269U (en) * | 2017-06-07 | 2018-03-13 | 株洲瑞德尔冶金设备制造有限公司 | Sintering furnace dewaxing device |
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