阅读说明：本技术 一种烧结炉脱蜡结构及烧结炉 (Sintering furnace dewaxing structure and sintering furnace ) 是由 李应新 肖骏光 侯新城 李俊德 于 2020-12-14 设计创作，主要内容包括：本发明实施例提供一种烧结炉脱蜡结构及烧结炉,烧结炉脱蜡结构包括：所述烧结炉脱蜡结构包括成一级脱蜡装置、二级脱蜡装置、热流夹套、冷流夹套以及连接通道；所述连接通道设置在所述一级脱蜡装置内部,通过所述连接通道将所述一级脱蜡装置与所述二级脱蜡装置进行连通；所述一级脱蜡装置上设置有进气口与出蜡口,所述连接通道的入口与所述进气口分别位于所述一级脱蜡装置的两端；所述热流夹套与所述冷流夹套分隔设置在所述一级脱蜡装置的两端外周对所述一级脱蜡装置进行包围,所述热流夹套与所述出蜡口设置在所述一级脱蜡装置的同一端,所述冷流夹套设置在所述一级脱蜡装置的另一端。可以对成型剂状态进行灵活有效的控制,提高烧结炉的整体性能。(The embodiment of the invention provides a sintering furnace dewaxing structure and a sintering furnace, wherein the sintering furnace dewaxing structure comprises: the sintering furnace dewaxing structure comprises a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel; the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device; the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device; the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device. Can flexibly and effectively control the state of the forming agent and improve the overall performance of the sintering furnace.)

1. The dewaxing structure of the sintering furnace is characterized by comprising a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel;

the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device;

the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device;

the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device.

2. A sintering furnace dewaxing structure according to claim 1, wherein the connecting passage is filled with a first flow-impeding filler.

3. A sintering furnace dewaxing structure according to claim 1 or claim 2, wherein the secondary dewaxing unit is filled with a second flow-impeding filler.

4. The sintering furnace dewaxing structure of claim 3, wherein the connecting channel comprises a first channel and a second channel, the first channel comprises a first gas inlet end and a first gas outlet end, the second channel comprises a second gas inlet end and a second gas outlet end, the first gas inlet end is arranged in the primary dewaxing device as an inlet of the connecting channel, the first gas outlet end is communicated with the second gas inlet end, and the second gas outlet end is communicated with the secondary dewaxing device.

5. The sintering furnace dewaxing structure of claim 4, wherein the first passage is filled with a first flow-resisting filler, and the second passage is provided with a flow-resisting partition.

6. The sintering furnace dewaxing structure of claim 1, wherein the heat flow jacket is a semi-surrounding structure, and the heat flow jacket of the semi-surrounding structure surrounds and is arranged on the periphery of the lower half part of the primary dewaxing device.

7. The sintering furnace dewaxing structure of claim 6, wherein the cold flow jacket comprises a main body structure and an extension structure, the main body structure is a full surrounding structure, the main body structure of the full surrounding structure comprises an outer periphery of the primary dewaxing device, the extension structure is a semi-surrounding structure, the extension structure of the semi-surrounding structure surrounds the outer periphery of the upper half of the primary dewaxing device, and the extension structure of the semi-surrounding structure corresponds to the hot flow jacket of the semi-surrounding structure.

8. The sintering furnace dewaxing structure of claim 1, wherein the dewaxing device further comprises a high support leg and a low support leg, and the dewaxing device is obliquely arranged through the high support leg and the low support leg.

9. The sintering furnace dewaxing structure of claim 8, wherein the primary dewaxing device is obliquely arranged by fixing the high supporting legs and the low supporting legs so that the heights of two ends of the primary dewaxing device are different, and the wax outlet is arranged at the lower end.

10. A sintering furnace comprising the dewaxing structure of any of claims 1 to 9.

Technical Field

The invention relates to the technical field of metallurgical equipment, in particular to a dewaxing structure of a sintering furnace and the sintering furnace.

Background

A sintering furnace is a heat treatment furnace that can provide a material with a specific temperature and a specific environmental pressure and vacuum, and generally includes: 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. In order to make the product be better shaped, a forming agent is usually added in the product, but the forming agent can affect the quality of the product if staying in the product. The forming agent is in a gasification state under the condition of high temperature, the gasified forming agent is extracted by a vacuum pump set to carry out directional movement, and the forming agent is liquefied by a dewaxing device, so that the collection and storage of the forming agent are completed. As shown in fig. 1, in a conventional dewaxing apparatus, when dewaxing is performed in a sintering furnace, a vacuum pump unit pumps gas in the dewaxing apparatus from a pumping port 121, so that a gas forming agent enters the dewaxing apparatus, a cold fluid is introduced into a jacket 14 of a first-stage dewaxing apparatus 11, a gaseous forming agent enters the first-stage dewaxing apparatus 11 through an air inlet 111, the gaseous forming agent is liquefied and stored in the first-stage dewaxing apparatus 11, and the remaining non-liquefied gaseous forming agent passes through a connecting channel 13 and then is liquefied again and flows into the first-stage dewaxing apparatus 11 by a second-stage dewaxing apparatus 12. When the dewaxing apparatus is dewaxing, hot fluid is introduced into the jacket 14 of the primary dewaxing apparatus 11 to keep the molding agent in a liquid state, so that the molding agent cannot be solidified and is discharged from the wax outlet 112. However, in the conventional dewaxing apparatus, during the dewaxing operation in the sintering furnace, the liquid forming agent in the dewaxing apparatus flows to and accumulates at the lowest position of the primary dewaxing apparatus, and the fluid introduced into the jacket of the primary dewaxing apparatus is single, so that the state control capability of the forming agent is poor. When the fluid is over-cooled: the liquid forming agent accumulated in the primary dewaxing device can be solidified, so that the gas forming agent in the sintering furnace is not smoothly pumped out and has residue, and the product quality is seriously influenced. When the fluid is overheated: the efficiency of the gaseous forming agent entering the first-stage dewaxing device is low, and the gaseous forming agent is pumped into the vacuum pump unit, so that the service life of the vacuum pump unit is influenced.

Disclosure of Invention

The embodiment of the invention provides a dewaxing structure of a sintering furnace and a pressure furnace, which can flexibly and effectively control the state of a forming agent in a dewaxing device, reduce the maintenance cost of a pump set and the wax removal time while ensuring the quality of a product, and further improve the overall performance of the sintering furnace.

In a first aspect, an embodiment of the present invention provides a sintering furnace dewaxing structure, where the sintering furnace dewaxing structure includes a primary dewaxing device, a secondary dewaxing device, a hot flow jacket, a cold flow jacket, and a connecting channel;

the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device;

the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device;

the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device.

Preferably, the connecting passage is filled with a first flow-blocking filler.

Preferably, the secondary dewaxing unit is packed with a second flow-impeding filler.

Preferably, the connection channel includes a first channel and a second channel, the first channel includes a first air inlet end and a first air outlet end, the second channel includes a second air inlet end and a second air outlet end, the first air inlet end is disposed inside the primary dewaxing device as an inlet of the connection channel, the first air outlet end is communicated with the second air inlet end, and the second air outlet end is communicated with the secondary dewaxing device.

Preferably, the first channel is filled with a first flow blocking filler, and the second channel is provided with a flow blocking partition plate.

Preferably, the heat flow jacket is a semi-surrounding structure, and the heat flow jacket of the semi-surrounding structure is arranged around the periphery of the lower half part of the primary dewaxing device.

Preferably, the cold flow jacket includes a main structure and an extension structure, the main structure is a full-enclosure structure, the main structure of the full-enclosure structure includes a periphery on which the primary dewaxing device is disposed, the extension structure is a half-enclosure structure, the extension structure of the half-enclosure structure encloses and is disposed on the periphery of the upper half portion of the primary dewaxing device, and the extension structure of the half-enclosure structure corresponds to the heat flow jacket of the half-enclosure structure.

Preferably, the primary dewaxing device comprises a high supporting leg and a low supporting leg, and the primary dewaxing device is obliquely arranged through the high supporting leg and the low supporting leg.

Preferably, the first-stage dewaxing device is obliquely arranged by fixing the high supporting legs and the low supporting legs, so that the heights of two ends of the first-stage dewaxing device are different, and the wax outlet is formed in the lower end of the first-stage dewaxing device.

In a second aspect, embodiments of the present invention further provide a pressure furnace, including a sintering furnace dewaxing structure according to any of the embodiments of the present invention.

The embodiment of the invention has the following beneficial effects: the sintering furnace dewaxing structure comprises a primary dewaxing device, a secondary dewaxing device, a heat flow jacket, a cold flow jacket and a connecting channel; the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device; the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device; the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device. Through setting up heat flow jacket, the cold flow jacket in one-level dewaxing device periphery, carry out nimble effectual control to the forming agent state in the one-level dewaxing device, reduce vacuum pump package maintenance cost, reduce the dewaxing time when can ensure product quality problem, and then improve the wholeness ability of fritting furnace.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a dewaxing structure of a sintering furnace in the prior art;

FIG. 2 is a schematic structural diagram of a dewaxing structure of a sintering furnace according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a connecting channel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a two-stage dewaxing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another connecting channel provided in the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another connecting channel provided in the embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a dewaxing structure of a sintering furnace according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a dewaxing structure of a sintering furnace according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a heat flow jacket according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a cold flow jacket according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2 to 10, fig. 2 is a schematic structural diagram of a dewaxing structure of a sintering furnace according to an embodiment of the present invention, in fig. 2, the dewaxing structure of the sintering furnace includes a primary dewaxing device 21, a secondary dewaxing device 22, a hot flow jacket 24, a cold flow jacket 25, and a connecting channel 23; the connecting channel 23 is disposed inside the primary dewaxing device 21, and the primary dewaxing device 21 and the secondary dewaxing device 22 are communicated through the connecting channel 23; the primary dewaxing device 21 is provided with an air inlet 211 and a wax outlet 212, and the inlet of the connecting channel 23 and the air inlet 211 are respectively positioned at two ends of the primary dewaxing device 21; the hot flow jacket 24 and the cold flow jacket 25 are separately arranged on the peripheries of two ends of the primary dewaxing device 21 to surround the primary dewaxing device 21, the hot flow jacket 24 and the wax outlet 212 are arranged at the same end of the primary dewaxing device 21, and the cold flow jacket 25 is arranged at the other end of the primary dewaxing device 21. Further, the hot flow jacket 24 and the cold flow jacket 25 are interposed between the peripheries of both ends of the primary dewaxing device 21.

The primary dewaxing device 21 is placed close to horizontal, the secondary dewaxing device 22 is placed close to vertical, so that the gas forming agent moves in the primary dewaxing device 21 in a close to horizontal direction, the gas forming agent moves in the secondary dewaxing device 22 in a close to vertical direction, and after the gas forming agent is cooled to be liquid forming agent, the liquid forming agent can flow down the wall of the secondary dewaxing device 22 and flow into the primary dewaxing device 21 through the connecting channel 23.

Further, a cold flow jacket 25 is also disposed around the outer periphery of the secondary dewaxing device 22 for introducing cold flow to liquefy the gas forming agent in the secondary dewaxing device 22 into a liquid forming agent.

Further, the primary dewaxing device 21 has a cylindrical structure, a dewaxing cavity is formed inside the primary dewaxing structure, and the hot flow jacket 24 and the cold flow jacket 25 surround the periphery of the primary dewaxing device 21 respectively. One end of the primary dewaxing device 21 is heated during hot flow in the hot flow jacket 24 to keep the liquid molding agent in a liquefied state in the primary dewaxing device 21, and the primary dewaxing device 21 is cooled during cold flow in the cold flow jacket 25 to liquefy the gaseous molding agent into the liquid molding agent.

Further, similarly, the secondary dewaxing device 22 is also a cylindrical structure, the inside of the secondary dewaxing device 22 is a dewaxing cavity, the inlet of the secondary dewaxing device 22 is connected to the outlet of the connecting channel 23, the suction port of the secondary dewaxing device 22 is connected to a vacuum pump set, the gas forming agent is sucked into the dewaxing device by the vacuum pump set, the gas forming agent is cooled and liquefied into a liquid forming agent when flowing through the primary dewaxing device 21, the connecting channel 23 and the secondary dewaxing device 22, and the liquid forming agent is discharged from the dewaxing device through the wax outlet 212 of the primary dewaxing device 21.

Further, the dewaxing device comprises a high supporting leg 210 and a low supporting leg 29, and the dewaxing device is obliquely arranged through the high supporting leg 210 and the low supporting leg 29. The first-stage dewaxing device 21 is obliquely arranged by fixing the high supporting legs 210 and the low supporting legs 29, so that the heights of the two ends of the first-stage dewaxing device 21 are different, and the wax outlet 212 is arranged at the bottom of the lower end. By providing the wax outlet 212 at the bottom of the lower end, the liquid forming agent can be stored in the first-stage dewaxing device 21 in a concentrated manner, and when the wax removal is required, the wax removal can be performed rapidly through the wax outlet 212.

Further, the high support leg 210 is disposed at the bottom of the cold flow jacket 25, and the low support leg 29 is disposed at the bottom of the hot flow jacket 24, so that the end of the primary dewaxing device 21 where the hot flow jacket 24 is located is the lower end, and the liquid forming agent can be stored at the lower end of the primary dewaxing device 21 and maintained in a liquid state by the hot flow in the hot flow jacket 24.

Further, the gas inlet 211 is disposed at a higher end of the first-stage dewaxing device 21, the wax outlet 212 is disposed at a lower end of the first-stage dewaxing device 21, the wax outlet 212 is located at a bottom of the lower end of the first-stage dewaxing device 21, and the gas inlet 211 is located in a middle of the higher end of the first-stage dewaxing device 21.

In the embodiment of the invention, the sintering furnace dewaxing structure comprises a primary dewaxing device 21, a secondary dewaxing device 22, a hot flow jacket 24, a cold flow jacket 25 and a connecting channel 23; the connecting channel 23 is disposed inside the primary dewaxing device 21, and the primary dewaxing device 21 and the secondary dewaxing device 22 are communicated through the connecting channel 23; the primary dewaxing device 21 is provided with an air inlet 211 and a wax outlet 212, and the inlet of the connecting channel 23 and the air inlet 211 are respectively positioned at two ends of the primary dewaxing device 21; the hot flow jacket 24 and the cold flow jacket 25 are separately arranged on the peripheries of two ends of the primary dewaxing device 21 to surround the primary dewaxing device 21, the hot flow jacket 24 and the wax outlet 212 are arranged at the same end of the primary dewaxing device 21, and the cold flow jacket 25 is arranged at the other end of the primary dewaxing device 21. Through the heat flow jacket 24 and the cold flow jacket 25 which are arranged on the periphery of the primary dewaxing device 21, the state of the forming agent in the primary dewaxing device 21 is flexibly and effectively controlled, the maintenance cost of a pump set can be reduced while the product quality problem is guaranteed, the wax removal time is shortened, and the overall performance of a sintering furnace is improved.

Preferably, fig. 3 is a schematic structural diagram of a connecting channel according to an embodiment of the present invention, and in fig. 3, the connecting channel 23 is filled with a first flow blocking filler 26. The first flow-blocking packing 26 may be a pall ring, and may be one of or a mixture of a metal pall ring, a ceramic pall ring, and a plastic pall ring. Through the first flow-resisting filler 26, the time of the gas forming agent in the dewaxing device is prolonged, so that the gas forming agent is sufficiently liquefied, the amount of the gas forming agent pumped by the vacuum pump unit is reduced, the service life of the vacuum pump unit is prolonged, and the maintenance cost of the pump unit is reduced.

Preferably, fig. 4 is a schematic structural diagram of a two-stage dewaxing device according to an embodiment of the present invention, and in fig. 4, a second flow-resisting filler 27 is filled in the two-stage dewaxing device 22. The second flow-blocking packing 27 may be a pall ring, and may be one of or a mixture of a metal pall ring, a ceramic pall ring, and a plastic pall ring. Through the first flow-resisting filler 26, the time of the gas forming agent in the dewaxing device is prolonged, so that the gas forming agent is sufficiently liquefied, the amount of the gas forming agent pumped by the vacuum pump unit is reduced, the service life of the vacuum pump unit is prolonged, and the maintenance cost of the pump unit is reduced.

Preferably, fig. 5 is a schematic structural diagram of another connection channel according to an embodiment of the present invention, in fig. 5, the connection channel 23 includes a first channel 231 and a second channel 232, the first channel 231 includes a first air inlet 2311 and a first air outlet 2312, the second channel 232 includes a second air inlet 2321 and a second air outlet 2322, the first air inlet 2311 is disposed inside the primary dewaxing device 21 as an inlet of the connection channel 23, the first air outlet 2312 is communicated with the second air inlet 2321, and the second air outlet 2322 is communicated with the secondary dewaxing device 22.

Further, the axis of the first passage 231 is parallel to the axis of the primary dewaxing device 21, and the axis of the second passage 232 is parallel to the axis of the secondary dewaxing device 22. The first channel 231 and the second channel 232 are both cylindrical structures, the first channel 231 is cylindrical structure, the gathering of the liquid forming agent is convenient while the inner wall area is increased to enable the gas forming agent to be liquefied more quickly, and the second channel 232 is cylindrical structure and used for increasing the inner wall area to enable the gas forming agent to be liquefied more quickly in the second channel 232.

Preferably, fig. 6 is a schematic structural view of another connecting channel according to an embodiment of the present invention, in fig. 6, a first flow blocking filler 26 is filled in the first channel 231, and a flow blocking partition 28 is disposed in the second channel 232. The first flow-blocking packing 26 may be a pall ring, and may be one of or a mixture of a metal pall ring, a ceramic pall ring, and a plastic pall ring. Through the first flow-resisting packing 26 in the first channel 231 and the flow-resisting partition plate 28 arranged in the second channel 232, the time of the gas forming agent in the dewaxing device is further prolonged, the gas forming agent is fully liquefied, the amount of the gas forming agent pumped by the vacuum pump unit is reduced, the service life of the vacuum pump unit is prolonged, and the maintenance cost of the pump unit is reduced.

Furthermore, the baffle plates 28 are arranged in a staggered manner, so that the flow length of the gas forming agent is increased, and the time of the gas forming agent in the dewaxing device is further prolonged.

Further, fig. 7 is a schematic structural diagram of another sintering furnace dewaxing structure according to an embodiment of the present invention, in fig. 7, a first choke filler 26 is filled in the first passage 231, a choke partition 28 is disposed in the second passage 232, and a second choke filler 27 is filled in the secondary dewaxing device 22.

Preferably, fig. 8 is a schematic structural diagram of another sintering furnace dewaxing structure according to an embodiment of the present invention, in fig. 8, the gas inlet 211 and the wax outlet 212 are disposed at a lower end of the first-stage dewaxing device 21, the wax outlet 212 is located at a bottom of the lower end of the first-stage dewaxing device 21, and the gas inlet 211 is located in a middle of the lower end of the first-stage dewaxing device 21, that is, the gas inlet 211 is located above the wax outlet 212. The heat flow jacket 24 is disposed on the outer periphery of the lower end of the primary dewaxing device 21, and is used for preventing the liquid forming agent collected at the lower end of the primary dewaxing device 21 from solidifying. Moreover, the gas inlet 211 and the wax outlet 212 are arranged at the lower end of the primary dewaxing device 21, so that the temperature carried by the gas forming agent is transferred to the liquid forming agent when the gas forming agent enters from the gas inlet 211, and the heat flow temperature in the heat flow jacket 24 can be reduced.

Preferably, fig. 9 is a schematic structural diagram of a heat flow jacket according to an embodiment of the present invention, in fig. 9, the heat flow jacket 24 is a semi-surrounding structure, and the heat flow jacket 24 of the semi-surrounding structure surrounds and is disposed on the outer periphery of the lower half of the primary dewaxing device 21.

Further, the end of the primary dewaxing device 21 where the hot fluid jacket 24 is located is a lower end, and the end of the primary dewaxing device 21 where the cold fluid jacket 25 is located is a higher end, so that the hot gas forming agent is cooled to be a liquid forming agent when rising in the primary dewaxing device 21, and the liquid forming agent flows to the lower end of the primary dewaxing device 21 and is stored in a heat-preserving manner through the hot fluid jacket 24 at the bottom of the lower end of the primary dewaxing device 21.

Further, the inlet of the connecting channel 23 and the gas inlet 211 are respectively located at two ends of the primary dewaxing device 21, so that the flowing length of the gas forming agent in the primary dewaxing device 21 can be increased, and further, the flowing time of the gas forming agent in the primary dewaxing device 21 can be increased, so that the gas forming agent can be sufficiently cooled.

Further, the gas inlet 211 is disposed at a higher end of the primary dewaxing device 21, and the inlet of the connecting channel 23 is disposed at a lower end of the primary dewaxing device 21. The hot flow jacket 24 is disposed at the bottom of the outer periphery of the lower end of the primary dewaxing device 21, and the cold flow jacket 25 is disposed at the outer periphery of the higher end of the primary dewaxing device 21. The heat flow in the heat flow jacket 24 only keeps the liquid forming agent collected at the lower end of the primary dewaxing device 21 warm to maintain the liquefied state of the liquid forming agent.

Further, the air inlet 211 is disposed at a lower end of the first-stage dewaxing device 21, the wax outlet 212 is located below the air inlet 211, the wax outlet 212 is located at a bottom of the lower end of the first-stage dewaxing device 21, an inlet of the connecting channel 23 is disposed at a higher end of the first-stage dewaxing device 21, the heat flow jacket 24 is disposed at a bottom of a periphery of the lower end of the first-stage dewaxing device 21, and the cold flow jacket 25 is disposed at a periphery of the higher end of the first-stage dewaxing device 21. The heat flow in the heat flow jacket 24 only keeps the liquid forming agent collected at the lower end of the primary dewaxing device 21 warm to maintain the liquefied state of the liquid forming agent.

Preferably, fig. 10 is a schematic structural diagram of a cold flow jacket provided in an embodiment of the present invention, and in fig. 10, the hot flow jacket 24 is a semi-surrounding structure, and the hot flow jacket 24 of the semi-surrounding structure surrounds and is disposed on the outer periphery of the lower half of the primary dewaxing device 21. The cold flow jacket 25 comprises a main body structure 251 and an extension structure 252, the main body structure 251 is a full-surrounding structure, the main body structure 251 of the full-surrounding structure comprises an outer periphery for arranging the primary dewaxing device 21, the extension structure 252 is a half-surrounding structure, the extension structure 252 of the half-surrounding structure surrounds an outer periphery arranged at the upper half part of the primary dewaxing device 21, and the extension structure 252 of the half-surrounding structure corresponds to the hot flow jacket 24 of the half-surrounding structure. Thus, the cooling areas of the cold flow jacket 25 and the primary dewaxing device 21 are increased.

The embodiment of the invention also provides a pressure furnace, which comprises the sintering furnace dewaxing structure in any embodiment of the invention.

The pressure furnace is further provided by the embodiment of the invention, and the sintering furnace dewaxing structure comprises a primary dewaxing device, a secondary dewaxing device, a hot flow jacket, a cold flow jacket and a connecting channel; the connecting channel is arranged in the primary dewaxing device and is used for communicating the primary dewaxing device with the secondary dewaxing device; the primary dewaxing device is provided with an air inlet and a wax outlet, and the inlet and the air inlet of the connecting channel are respectively positioned at two ends of the primary dewaxing device; the heat flow jacket and the cold flow jacket are separately arranged at the peripheries of two ends of the primary dewaxing device to surround the primary dewaxing device, the heat flow jacket and the wax outlet are arranged at the same end of the primary dewaxing device, and the cold flow jacket is arranged at the other end of the primary dewaxing device. Through setting up heat flow jacket, the cold flow jacket in one-level dewaxing device periphery, carry out nimble effectual control to the forming agent state in the one-level dewaxing device, reduce vacuum pump package maintenance cost, reduce the dewaxing time when can ensure product quality problem, and then improve the wholeness ability of fritting furnace.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.