CN212713719U - Gas nitriding furnace equipment - Google Patents
Gas nitriding furnace equipment Download PDFInfo
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- CN212713719U CN212713719U CN202021343227.3U CN202021343227U CN212713719U CN 212713719 U CN212713719 U CN 212713719U CN 202021343227 U CN202021343227 U CN 202021343227U CN 212713719 U CN212713719 U CN 212713719U
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- muffle
- furnace body
- cooling
- gas nitriding
- muffle tank
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Abstract
The utility model provides a gaseous nitriding furnace equipment, include: the heating device comprises a furnace body, a heating cavity is formed in the furnace body, a muffle tank is installed in the heating cavity, a gap is reserved between the muffle tank and the inner wall of the heating cavity, and the furnace body is provided with an air inlet and an air outlet which are communicated with the gap; the cooling pipeline is used for containing cooling liquid and is arranged on the outer wall of the muffle tank, the cooling pipeline is arranged along the circumferential direction of the muffle tank, the cooling pipeline is provided with an input end and an output end, and the input end and the output end respectively extend to the outside of the furnace body; and the air supply pipe is arranged outside the furnace body and connected to the air inlet. The utility model provides a gas nitriding furnace temperature decline slow problem in nitriding treatment back stove.
Description
Technical Field
The utility model relates to a nitriding furnace technical field, concretely relates to gaseous nitriding furnace equipment.
Background
The gas nitriding furnace is equipment with nitriding treatment, has the characteristics of low treatment temperature, short time and small workpiece deformation, and has high fatigue limit and good wear resistance.
The nitriding treatment of the gas nitriding furnace is a chemical heat treatment process for making nitrogen atoms penetrate into the surface layer of a workpiece in a certain medium at a certain temperature. The product after nitriding treatment has the characteristics of excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance.
The current nitriding treatment is generally carried out by introducing ammonia gas into a sealed tank in a nitriding furnace, heating to about 560 ℃ and keeping for a proper time. Due to the tightness of the nitriding furnace, the temperature in the furnace is slowly reduced after the nitriding treatment is finished, and the next use is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the gas nitriding furnace equipment is provided so as to solve the problem that the temperature in the gas nitriding furnace is slowly reduced after nitriding treatment.
To achieve the above object, there is provided a gas nitriding furnace apparatus comprising:
the heating device comprises a furnace body, a heating cavity is formed in the furnace body, a muffle tank is installed in the heating cavity, a gap is reserved between the muffle tank and the inner wall of the heating cavity, and the furnace body is provided with an air inlet and an air outlet which are communicated with the gap;
the cooling pipeline is used for containing cooling liquid and is arranged on the outer wall of the muffle tank, the cooling pipeline is arranged along the circumferential direction of the muffle tank, the cooling pipeline is provided with an input end and an output end, and the input end and the output end respectively extend to the outside of the furnace body; and
and the air supply pipe is arranged outside the furnace body and connected to the air inlet.
Furthermore, the cooling pipeline comprises a plurality of ring pipes, the ring pipes are hooped on the circumferential surface of the muffle tank, the plurality of ring pipes are arranged along the axial direction of the muffle tank, and a guide pipe is connected between every two adjacent ring pipes.
Furthermore, two opposite sides of each ring pipe are respectively connected with one guide pipe.
Furthermore, the ring pipe comprises an outer ring plate and two opposite supporting plates, the two supporting plates are connected to the outer wall of the muffle tank, a circle of supporting plates is arranged along the circumferential direction of the muffle tank, and the outer ring plate is connected to one side, far away from the muffle tank, of the two supporting plates.
Further, the muffle tank is arranged in the horizontal direction, the input end is located below the muffle tank, and the output end is located above the muffle tank.
Further, the air supply pipe is connected with a blower.
Further, the cooling liquid is water.
The beneficial effects of the utility model reside in that, the utility model discloses a gas nitriding furnace equipment is when the muffle tank in the cooling furnace body, opens air intake and air outlet, inputs external cooling air current to the air intake through the blast pipe, utilizes the cooling air current to surround the outside of muffle tank and carries out the heat exchange and then produce the hot gas flow, and the hot gas flow then discharges the furnace body through the air outlet and takes away the partial heat of muffle tank; on the other hand, the input end and the output end of the cooling pipeline are opened, the cooling liquid is input into the cooling pipeline through the input end and then is discharged through the output end, and partial heat of the muffle tank is absorbed by the circulation of the cooling liquid. The heat in the furnace body quickly and efficiently reduces the temperature in the furnace body under the dual functions of cooling air flow and cooling liquid, thereby improving the service efficiency of the gas nitriding furnace.
Drawings
Fig. 1 is a schematic structural view of a gas nitriding furnace apparatus according to an embodiment of the present invention.
Fig. 2 is a sectional view of the furnace body according to the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a cooling pipe according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Fig. 1 is the structure schematic diagram of the gas nitriding furnace equipment of the embodiment of the present invention, fig. 2 is the sectional view of the furnace body of the embodiment of the present invention, and fig. 3 is the structure schematic diagram of the cooling pipe of the embodiment of the present invention.
Referring to fig. 1 to 3, the present invention provides a gas nitriding furnace apparatus, including: furnace body 1, cooling duct 2 and blast pipe 3.
Specifically, a heating cavity is formed in the furnace body 1, and a muffle tank 11 is arranged in the heating cavity. A gap is left between the muffle 11 and the inner wall of the heating chamber for the circulation of the air flow.
The furnace body 1 is provided with an air inlet a and an air outlet b. The air inlet a and the air outlet b are respectively communicated with the gap. The blast pipe 3 is installed outside the furnace body 1, and the blast pipe 3 is connected to the air inlet a of the furnace body.
The cooling pipe 2 is mounted on the outer wall of the muffle tank 11. The cooling pipeline is arranged around the circumferential surface of the muffle tank. The cooling pipe 2 is provided in the circumferential direction of the muffle tank 11. The cooling duct 2 has an input c and an output d. The input end c and the output end d respectively extend to the outside of the furnace body 1. The cooling pipe 2 is used for containing cooling liquid. The cooling pipeline is a heat conducting pipeline.
The heat of muffle tank is conducted to the coolant liquid through the pipe wall of cooling pipe, and the coolant liquid absorbs the heat of muffle tank conduction and is discharged from the output of cooling pipe, and the coolant liquid is carried to the cooling pipe through the input of cooling pipe again after the cooling outside, and the heat of muffle tank conduction is taken away in the circulation like this.
And during nitriding treatment, the air inlet and the air outlet are closed, and meanwhile, cooling liquid in the cooling pipeline is discharged, so that the input end and the output end of the cooling pipeline are closed.
When the muffle tank is cooled, the air inlet and the air outlet are opened, external cooling air flow is input into the air inlet through the air supply pipe, heat exchange is carried out around the outside of the muffle tank by utilizing the cooling air flow so as to generate hot air flow, and the hot air flow is discharged out of the furnace body through the air outlet so as to take away part of heat of the muffle tank; on the other hand, the input end and the output end of the cooling pipeline are opened, the cooling liquid is input into the cooling pipeline through the input end and then is discharged through the output end, and partial heat of the muffle tank is absorbed by the circulation of the cooling liquid. The heat in the furnace body quickly and efficiently reduces the temperature in the furnace body under the dual functions of cooling air flow and cooling liquid, thereby improving the service efficiency of the gas nitriding furnace.
In this embodiment, the muffle tank comprises a heat resistant steel tank body. The heat-resistant steel can body is a 1Cr18Ni9Ti can body, a Cr25Ni20 can body or an inconel 600 can body.
Correspondingly, the cooling pipeline is made of a material with high heat-conducting property. Further, the cooling pipeline is a 1Cr18Ni9Ti pipe or a Cr25Ni20 pipe.
Specifically, the cooling pipe 2 includes a plurality of loops 21 and a guide pipe 22.
The ring pipe 21 is hooped on the circumferential surface of the muffle 11. A plurality of collar pipes 21 are provided along the axial direction of the muffle tank 11. In the present embodiment, the plurality of collars 21 are disposed at equal intervals. A conduit 22 is connected between two adjacent collars 21. Wherein, a conduit 22 is connected to two opposite sides of each ring pipe 21.
In a preferred embodiment, the grommet 21 includes an outer ring plate 212 and two support plates 211. The two support plates 211 are oppositely disposed. The supporting plate is perpendicular to the circumferential surface of the muffle tank. The two support plates 211 are attached to the outer wall of the muffle tank 11. The support plate 211 is provided one turn in the circumferential direction of the muffle tank 11. The outer ring plate 212 is connected to the side of the two support plates 211 remote from the muffle 11.
In the present embodiment, the muffle tank 11 is disposed in the horizontal direction, and the input end c of the cooling pipe is located below the output end d of the cooling pipe. The input is located the below of muffle tank, and the output is located the top of muffle tank.
The ring pipe is made of strip steel with the thickness of 5 mm. The strip steel is made of 1Cr18Ni9Ti or Cr25Ni 20. The strip steel is bent into a C-shaped pipe body with the wide edge (outer ring plate) of about 100mm and the thick edge (support plate) of about 30 mm.
The C-shaped pipe body is rolled to an annular pipe with the same outer diameter as the muffle tank by a plate rolling machine and is hooped on the circumferential surface of the muffle tank.
The circular pipe hooped on the circumferential surface of the muffle tank is welded by argon arc welding, a support plate of the circular pipe and the outer wall of the muffle tank are welded into a continuous welding line to form an annular pipeline, a 10bar watertight test is carried out, and the sealing property of the cooling pipeline is ensured.
The guide pipe is a C-shaped pipe body made of the same material, the width of the pipe body is about 100mm, the thickness of the pipe body is about 20mm, and a plurality of ring pipes are connected in series. The cooling pipeline extends to the outside input of furnace body and needs in the below of muffle tank, and the output of cooling pipeline is in the top of muffle tank, ensures that the coolant liquid can flow through all regions of cooling pipeline, and then cools off for the comprehensive cooling of muffle tank.
In a preferred embodiment, a blower 31 is connected to the air supply duct 3. The blower inputs cooling airflow outside the furnace body into the furnace body, and hot airflow formed after heat exchange is discharged outside the furnace body through the air outlet.
In a preferred embodiment, the cooling fluid in the cooling channel is water.
The utility model discloses a gas nitriding furnace equipment is on muffle tank outer circumferencial direction surface, and one section distance welding round water cooling C type (the cross-section is C shape) pipeline at every interval forms annular ring canal to establish ties, the switch-on with all ring canals, like this the cooling water can with the direct contact heat transfer of muffle tank body when the pipeline flows through, ensure that the temperature of muffle tank is even on the circumference cross-section. Meanwhile, the outer cold blast of the blower is utilized to strengthen the heat exchange between the outer wall of the ring pipe and the cold airflow in the gap in the furnace body.
Adopt the utility model discloses a gas nitriding furnace equipment with the product in the muffle tank from 560 ℃ of temperature cooling to being less than or equal to 100 ℃ of temperature totally need about 2 hours.
The utility model discloses a gas in the sealed muffle tank of gas nitriding furnace equipment can not lead to leaking because of the cooling, avoids equipment corrosion, environmental pollution etc. in addition, because welded cooling tube, has improved rigidity and intensity to the jar body of muffle tank.
It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the present invention, which are intended to be limited only by the scope of the appended claims.
Claims (7)
1. A gas nitriding furnace apparatus, comprising:
the heating device comprises a furnace body, a heating cavity is formed in the furnace body, a muffle tank is installed in the heating cavity, a gap is reserved between the muffle tank and the inner wall of the heating cavity, and the furnace body is provided with an air inlet and an air outlet which are communicated with the gap;
the cooling pipeline is used for containing cooling liquid and is arranged on the outer wall of the muffle tank, the cooling pipeline is arranged along the circumferential direction of the muffle tank, the cooling pipeline is provided with an input end and an output end, and the input end and the output end respectively extend to the outside of the furnace body; and
and the air supply pipe is arranged outside the furnace body and connected to the air inlet.
2. The gas nitriding furnace apparatus according to claim 1, wherein the cooling pipe comprises a plurality of ring pipes, the ring pipes are arranged around the circumference of the muffle tank, the plurality of ring pipes are arranged along the axial direction of the muffle tank, and a guide pipe is connected between two adjacent ring pipes.
3. The gas nitriding furnace apparatus of claim 2, wherein one of said conduits is connected to each of opposite sides of each of said bustle pipes.
4. The gas nitriding furnace apparatus of claim 2, wherein the collar comprises an outer ring plate and two opposing support plates, the two support plates are attached to the outer wall of the muffle, the support plates are arranged in a circle along the circumference of the muffle, and the outer ring plate is attached to the side of the two support plates away from the muffle.
5. The gas nitriding furnace apparatus of claim 1, wherein the muffle is horizontally oriented, the input end is located below the muffle, and the output end is located above the muffle.
6. The gas nitriding furnace apparatus according to claim 1, wherein a blower is connected to the blast pipe.
7. The gas nitriding furnace apparatus of claim 1, wherein the coolant is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021343227.3U CN212713719U (en) | 2020-07-09 | 2020-07-09 | Gas nitriding furnace equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021343227.3U CN212713719U (en) | 2020-07-09 | 2020-07-09 | Gas nitriding furnace equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212713719U true CN212713719U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021343227.3U Active CN212713719U (en) | 2020-07-09 | 2020-07-09 | Gas nitriding furnace equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212713719U (en) |
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2020
- 2020-07-09 CN CN202021343227.3U patent/CN212713719U/en active Active
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