CN112210745A - Nitriding furnace - Google Patents
Nitriding furnace Download PDFInfo
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- CN112210745A CN112210745A CN202011280048.4A CN202011280048A CN112210745A CN 112210745 A CN112210745 A CN 112210745A CN 202011280048 A CN202011280048 A CN 202011280048A CN 112210745 A CN112210745 A CN 112210745A
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- 238000005121 nitriding Methods 0.000 title claims abstract description 51
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 66
- 239000003381 stabilizer Substances 0.000 claims description 25
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 28
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to the technical field of metal treatment, and discloses a nitriding furnace, which comprises: a furnace shell, one end of which is provided with a medium inlet; the guide cylinder is internally provided with a guide cavity and forms a communication cavity with the furnace shell; the first flow stabilizing plate is provided with a first through hole, the sum of the flow areas of the first through hole in the unit area of the first flow stabilizing plate is a first flow area, and the first flow area is gradually reduced from the center of the first flow stabilizing plate to the edge; the second flow stabilizing plate is provided with a second through hole, the sum of the flow areas of the second through hole in the unit area of the second flow stabilizing plate is a second flow area, and the second flow area is gradually increased from the center of the second flow stabilizing plate to the edge; and the air guide assembly is communicated with the flow guide cavity. The first flow stabilizing plate and the second flow stabilizing plate of the nitriding furnace disclosed by the invention can enable gas in the guide cylinder to uniformly flow, and the air guide assembly can adjust the discharge speed of the gas, so that parts in the guide cylinder can be uniformly contacted with the gas, and the finished product rate of the parts is increased.
Description
Technical Field
The invention relates to the technical field of metal treatment, in particular to a nitriding furnace.
Background
Nitriding is a common way to improve the surface wear resistance and hardness of metal materials, and the uniformity of gas in a nitriding furnace has an important influence on the uniformity of a nitriding layer of a part. The existing commonly used nitriding furnaces comprise a pit type nitriding furnace and a box type nitriding furnace, the uniformity of the internal wind speed of the two nitriding furnaces is very poor, nitrogen atoms cannot be successfully permeated into partial parts or partial positions of a certain part in the nitriding furnace, the nitriding process fails, and the finished product rate of the parts is low.
Disclosure of Invention
Based on the above, the invention aims to provide a nitriding furnace, which solves the problem that the yield of parts is reduced due to poor uniformity of wind speed in the nitriding furnace in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a nitriding furnace comprising: a furnace shell, one end of which is provided with a medium inlet; the guide cylinder is arranged in the furnace shell, a guide cavity is defined in the guide cylinder, a communicating cavity is enclosed by the guide cylinder and the furnace shell, and the communicating cavity is communicated with the medium inlet; the first flow stabilizing plate is arranged at one end, far away from the medium inlet, of the guide cylinder, a plurality of first through holes for communicating the communicating cavity with the guide cavity are formed in the first flow stabilizing plate, the sum of the flow areas of the first through holes in each unit area on the surface of the first flow stabilizing plate is a first flow area, and the first flow area is gradually reduced from the center of the first flow stabilizing plate to the edge; the second flow stabilizing plate is arranged at one end, close to the medium inlet, of the guide cylinder, a plurality of second through holes for communicating the communicating cavity with the guide cavity are formed in the second flow stabilizing plate, the sum of the flow areas of the second through holes in each unit area on the surface of the second flow stabilizing plate is a second flow area, and the second flow area is gradually increased from the center of the second flow stabilizing plate to the edge; and the air guide component is arranged at one end of the furnace shell and is used for discharging the gas in the flow guide cavity and adjusting the flow rate of the gas.
As a preferred scheme of the nitriding furnace, the draft tube comprises a draft tube body and a reducer, the reducer is arranged at one end of the draft tube body close to the medium inlet, the first flow stabilizer is detachably arranged at one end of the draft tube body far away from the reducer, and the second flow stabilizer is detachably arranged at one end of the draft tube body connected with the reducer.
As a preferred scheme of the nitriding furnace, the reducing pipe comprises a reducing section, a transition section and a cylindrical section which are sequentially connected, wherein the reducing section is arranged on the guide shell, the transverse sectional area of the reducing section is gradually reduced along the direction far away from the guide shell, and the wall surface of the transition section is a curved surface which is bent towards the inner part of the transition section.
As a preferred scheme of nitriding furnace, first stabilizer is first circular stabilizer, is equipped with at least three interval distribution's first foraminiferous layer along the radial of first stabilizer, every first foraminiferous layer includes a plurality of along circumference evenly distributed first through-hole, every two adjacent first through-hole of first foraminiferous layer is first distance along the distance of circumferencial direction, first distance is along the radial from inside to outside gradual increase of first stabilizer.
As a preferred scheme of the nitriding furnace, the second flow stabilizing plate is a second circular flow stabilizing plate, at least three second orifice layers distributed at intervals are arranged along the radial direction of the second flow stabilizing plate, each second orifice layer comprises a plurality of second through holes uniformly distributed in the circumferential direction, the distance between every two adjacent second through holes of each second orifice layer along the circumferential direction is a second distance, and the second distance is gradually increased from inside to outside along the radial direction of the second flow stabilizing plate.
As a preferable mode of the nitriding furnace, the air guide assembly comprises: the variable frequency motor is positioned on the outer side of the furnace shell; the protective shell is positioned in the communicating cavity, and the end face of the protective shell is attached to the end face of the guide shell; the centrifugal fan is located in the protective shell, the variable frequency motor is connected with the centrifugal fan, and the variable frequency motor can drive the centrifugal fan to rotate so as to discharge gas in the guide shell.
As a preferred scheme of the nitriding furnace, the nitriding furnace further comprises a plurality of support frames, one end of each support frame is connected with the furnace shell, and the other end of each support frame is connected with the guide cylinder.
As a preferred scheme of nitriding furnace, the stove outer covering includes furnace body and bell, the open setting of one end of furnace body, the bell lock is in the open end of stove outer covering, the other end of furnace body is equipped with the medium import.
As a preferred scheme of the nitriding furnace, the furnace body is a heat-insulating furnace body, and the furnace cover is a heat-insulating furnace cover.
As a preferred scheme of the nitriding furnace, the number of the medium inlets is at least two, and each medium inlet is communicated with the communication cavity.
The invention has the beneficial effects that: the first flow area of the first flow stabilizing plate of the nitriding furnace disclosed by the invention is gradually reduced from the center of the first flow stabilizing plate to the edge, so that the part, close to the central axis of the guide cylinder, of the part in the guide cylinder can be firstly contacted with more gas, then the gas flows along the outer surface of the part to the direction far away from the central axis of the guide cylinder, and finally more gas exists in the region far away from the central axis of the guide cylinder, while the second flow area of the second flow stabilizing plate is gradually increased along the direction from the center of the second flow stabilizing plate to the edge, so that the gas can be uniformly discharged through the second through holes, the gas can uniformly flow through the surface of the part, the uniformity of nitrogen atoms permeating into the surface of the part is improved, the nitriding yield of the part is increased, the air guide assembly can adjust the discharge speed of the gas according to actual needs, and the gas flow speed around the part is in a proper range, further increasing the uniformity of nitriding the part.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and 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 contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a nitriding furnace provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a first flow stabilizer provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic view of a second flow stabilizer according to an embodiment of the present invention.
In the figure:
1. a furnace shell; 10. a communicating cavity; 11. a furnace body; 12. a furnace cover;
2. a draft tube; 20. a flow guide cavity; 21. a draft tube body; 22. a reducer; 221. a tapered section; 222. a transition section; 223. a cylindrical section;
3. a first flow stabilizer; 30. a first through hole;
4. a second flow stabilizer; 40. a second through hole;
5. an air guide assembly; 51. a variable frequency motor; 52. a centrifugal fan;
6. a support frame;
7. a medium pipe.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the embodiment provides a nitriding furnace, which includes a furnace shell 1, a draft tube 2, a first flow stabilizing plate 3, a second flow stabilizing plate 4, an air guiding assembly 5 and a medium pipe 7, wherein one end of the furnace shell 1 is provided with a medium inlet, the medium inlet is provided with the medium pipe 7, the draft tube 2 is disposed in the furnace shell 1, and the draft tube 2 defines a draft cavity 20 therein, the draft tube 2 and the furnace shell 1 enclose a communicating cavity 10, the communicating cavity 10 is communicated with the medium inlet, the first flow stabilizing plate 3 is disposed at an end of the draft tube 2 away from the medium inlet, the first flow stabilizing plate 3 is provided with a plurality of first through holes 30 communicating the communicating cavity 10 with the draft cavity 20, a sum of flow areas of the first through holes 30 per unit area on a surface of the first flow stabilizing plate 3 is a first flow area, the first flow area gradually decreases from a center of the first flow stabilizing plate 3 to an edge, the second flow stabilizing plate 4 is disposed at an end of the draft tube 2 close to the medium inlet, the second flow stabilizing plate 4 is provided with a plurality of second through holes 40 communicating the communicating cavity 10 with the flow guiding cavity 20, the sum of the flow areas of the second through holes 40 in each unit area on the surface of the second flow stabilizing plate 4 is a second flow area, the second flow area is gradually increased from the center of the second flow stabilizing plate 4 to the edge, the air guide assembly 5 is arranged at one end of the furnace shell 1, and the air guide assembly 5 is used for discharging the gas in the flow guiding cavity 20 and adjusting the flow rate of the gas.
Note that the first through hole 30 of the first flow stabilizer 3 in fig. 1 is not shown in the drawings. Specifically, as shown in fig. 2, the first flow stabilizing plate 3 of this embodiment is detachably mounted on the draft tube 2, the first flow stabilizing plate 3 is a first circular flow stabilizing plate, the first flow stabilizing plate 3 is provided with first hole layers distributed at intervals along the radial direction of the first flow stabilizing plate 3, each first hole layer includes a plurality of first through holes 30 uniformly distributed along the circumferential direction, the distance between two adjacent first through holes 30 of each first hole layer along the circumferential direction is a first distance, and the first distance gradually increases from inside to outside along the radial direction of the first flow stabilizing plate 3. In other embodiments, the distribution of the first through holes 30 on the first flow stabilizing plate 3 is not limited to this limitation of the embodiment, and may be other distribution as long as the first flow area is ensured to be gradually reduced from the center of the first flow stabilizing plate 3 toward the edge.
Note that the second through hole 40 of the second flow stabilization plate 4 in fig. 1 is not shown in the drawings. Specifically, as shown in fig. 2, the second flow stabilizing plate 4 of this embodiment is detachably mounted on the draft tube 2, the second flow stabilizing plate 4 is a second circular flow stabilizing plate, the second flow stabilizing plate 4 is provided with a second orifice layer distributed at intervals along the radial direction of the second flow stabilizing plate 4, each second orifice layer includes a plurality of second through holes 40 distributed uniformly in the circumferential direction, the distance between two adjacent second through holes 40 of each second orifice layer along the circumferential direction is a second distance, and the second distance gradually increases from inside to outside along the radial direction of the second flow stabilizing plate 4. In other embodiments, the second flow stabilizing plate 4 may also be fixedly disposed on the guide shell 2, and the distribution manner of the second through holes 40 on the second flow stabilizing plate 4 is not limited to this limitation of this embodiment, and may also be other distribution manners as long as it is ensured that the second flow area gradually increases from the center of the second flow stabilizing plate 4 to the edge.
Further, as the first flow area is gradually reduced along the direction from the center of the first flow stabilizing plate 3 to the edge, the part of the part inside the guide cylinder 2, which is close to the central axis of the guide cylinder 2, can be firstly contacted with more gas, and then the gas flows along the outer surface of the part in the direction away from the central axis of the guide cylinder 2, finally, a region far away from the central axis of the guide cylinder 2 has more gas, and the second flow area of the second flow stabilizing plate 4 is gradually increased along the direction from the center of the second flow stabilizing plate 4 to the edge, so that the gas can be uniformly discharged through the second through holes 40, the gas can uniformly flow through the surface of the part, the uniformity of nitrogen atoms permeating into the surface of the part is improved, and the yield of nitriding of the part is increased.
The first through hole 30 that distributes on the first stabilizer 3 of the nitriding furnace that this embodiment provided can make gaseous even entering water conservancy diversion chamber 20, the second through hole 40 that distributes on the second stabilizer 4 can make gaseous even discharge water conservancy diversion chamber 20 to the part that the assurance is located draft tube 2 can be even with gaseous contact, increase the yield of part, air guide component 5 can be according to actual need adjustment gaseous exhaust velocity, make the part gas velocity all around be located suitable within range, the homogeneity of part nitriding has further been increased.
Specifically, as shown in fig. 1, the guide shell 2 of the present embodiment includes a guide shell body 21 and a reducer 22, the reducer 22 is disposed at an end of the guide shell body 21 close to the medium inlet, the first flow stabilizer 3 is detachably disposed at an end of the guide shell 2 far from the reducer 22, and the second flow stabilizer 4 is detachably disposed at an end of the guide shell body 21 connected to the reducer 22. The reducing pipe 22 comprises a reducing section 221, a transition section 222 and a cylindrical section 223 which are connected in sequence, the reducing section 221 is arranged on the guide shell 2, the transverse cross-sectional area of the reducing section 221 is gradually reduced along the direction far away from the guide shell 2, and the wall surface of the transition section 222 is a curved surface which is bent towards the inner part of the transition section. The added reducing pipe 22 can not only improve the efficiency of the air guide component 5 for extracting the gas in the guide cylinder 2, but also reduce the wind resistance coefficient in the gas flowing process, and is beneficial to the air guide component 5 for extracting the gas in the guide cylinder 2.
As shown in fig. 1, the air guiding assembly 5 of this embodiment includes a variable frequency motor 51, a protective shell (not shown in the figure) and a centrifugal fan 52, the variable frequency motor 51 is located outside the furnace shell 1, the protective shell is located in the communicating cavity 10, and an end surface of the protective shell is attached to an end surface of the draft tube 2, so as to ensure that the air guiding assembly 5 only extracts the gas in the draft cavity 20, but not the gas in the communicating cavity 10, the centrifugal fan 52 is located in the protective shell, the variable frequency motor 51 is connected to the centrifugal fan 52, and the variable frequency motor 51 can drive the centrifugal fan 52 to rotate to discharge the gas in the draft tube 2.
As shown in fig. 1, the nitriding furnace of this embodiment further includes a plurality of support frames 6, the one end of each support frame 6 is connected with the furnace shell 1, the other end of each support frame 6 is connected with the draft tube 2, the support frames 6 are used for supporting the draft tube 2 so that the draft tube 2 is fixed on the furnace shell 1, the central axis of the draft tube 2 coincides with the central axis of the furnace shell 1, so as to ensure that the distance between the inner wall of the draft tube 2 and the inner wall of the furnace shell 1 is the same, ensure that the flow rate of gas in the communicating cavity 10 entering the draft tube cavity 20 through the first communicating hole is the same, ensure that the thickness of the nitriding layer on the surface of the part is the same, and further.
As shown in fig. 1, the furnace shell 1 of the present embodiment includes a furnace body 11 and a furnace cover 12, wherein one end of the furnace body 11 is open, the furnace cover 12 is fastened to the open end of the furnace shell 1, and the other end of the furnace body 11 is provided with a medium inlet. Wherein, the furnace body 11 is a heat insulation furnace body, the furnace cover 12 is a heat insulation furnace cover, so as to prevent the communicating cavity 10 from exchanging heat with the outside through the furnace shell 1, thereby reducing the temperature in the diversion cavity 20, influencing the nitrogen atoms to permeate into the parts, and reducing the yield of the parts in the diversion cylinder 2.
As shown in fig. 1, the number of the medium inlets of the present embodiment is two, each medium inlet is provided with one medium pipe 7, each medium pipe 7 is communicated with the communicating cavity 10, and the two medium pipes 7 are respectively located at two opposite sides of the air guiding component 5, so as to ensure that the communicating cavity 10 can be uniformly filled with the air entering the communicating cavity 10 through the medium pipes 7.
Specifically, when the nitriding furnace is placed as shown in fig. 1, the medium pipe 7 and the air guide assembly 5 are both located at the lower end of the furnace shell 1, the first flow stabilizing plate 3 is located at the upper end of the guide cylinder 2, the second flow stabilizing plate 4 is located at the lower end of the guide cylinder 2, the gas entering through the medium pipe 7 flows from bottom to top in the communicating cavity 10 and enters the guide cavity 20 through the first through hole 30 on the first flow stabilizing plate 3, and the gas is sucked out of the nitriding furnace through the second through hole 40 on the second flow stabilizing plate 4 and finally discharged out of the nitriding furnace.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A nitriding furnace, comprising:
a furnace shell (1), one end of which is provided with a medium inlet;
the guide shell (2) is arranged in the furnace shell (1), a guide cavity (20) is defined in the guide shell (2), a communicating cavity (10) is enclosed by the guide shell (2) and the furnace shell (1), and the communicating cavity (10) is communicated with the medium inlet;
the first flow stabilizing plate (3) is arranged at one end, far away from the medium inlet, of the guide shell (2), a plurality of first through holes (30) which are communicated with the communicating cavity (10) and the guide cavity (20) are formed in the first flow stabilizing plate (3), the sum of the flow areas of the first through holes (30) in each unit area on the surface of the first flow stabilizing plate (3) is a first flow area, and the first flow area is gradually reduced from the center of the first flow stabilizing plate (3) to the edge;
the second flow stabilizing plate (4) is arranged at one end, close to the medium inlet, of the guide cylinder (2), a plurality of second through holes (40) which are communicated with the communicating cavity (10) and the guide cavity (20) are formed in the second flow stabilizing plate (4), the sum of the flow areas of the second through holes (40) in each unit area on the surface of the second flow stabilizing plate (4) is a second flow area, and the second flow area is gradually increased from the center of the second flow stabilizing plate (4) to the edge;
the air guide assembly (5) is arranged at one end of the furnace shell (1), and the air guide assembly (5) is used for discharging gas in the flow guide cavity (20) and can adjust the flow rate of the gas.
2. The nitriding furnace according to claim 1, wherein the guide shell (2) comprises a guide shell body (21) and a reducer (22), the reducer (22) is arranged at one end of the guide shell body (21) close to the medium inlet, the first flow stabilizer (3) is detachably arranged at one end of the guide shell (2) far away from the reducer (22), and the second flow stabilizer (4) is detachably arranged at one end of the guide shell body (21) connected with the reducer (22).
3. The nitriding furnace according to claim 2, wherein the reducer (22) comprises a tapered section (221), a transition section (222) and a cylindrical section (223) which are connected in sequence, the tapered section (221) is arranged on the guide shell (2), the cross-sectional area of the tapered section (221) is gradually reduced along a direction away from the guide shell (2), and the wall surface of the transition section (222) is a curved surface which is curved towards the inside of the transition section.
4. The nitriding furnace according to claim 1, wherein the first flow stabilizer (3) is a first circular flow stabilizer, a plurality of first hole layers are arranged at intervals along a radial direction of the first flow stabilizer (3), each first hole layer comprises at least three first through holes (30) uniformly distributed along a circumferential direction, a distance between every two adjacent first through holes (30) of each first hole layer along the circumferential direction is a first distance, and the first distance gradually increases from inside to outside along the radial direction of the first flow stabilizer (3).
5. Nitriding furnace according to claim 1, characterized in that the second stabilizer (4) is a second circular stabilizer, a plurality of second orifice layers are arranged at intervals along the radial direction of the second stabilizer (4), each second orifice layer comprises at least three second through holes (40) uniformly distributed circumferentially, the distance between two adjacent second through holes (40) of each second orifice layer along the circumferential direction is a second distance, and the second distance gradually increases from inside to outside along the radial direction of the second stabilizer (4).
6. Nitriding furnace according to claim 1, characterized in that the air guiding assembly (5) comprises:
the variable frequency motor (51) is positioned on the outer side of the furnace shell (1);
the protective shell is positioned in the communicating cavity (10), and the end face of the protective shell is attached to the end face of the guide shell (2);
the centrifugal fan (52) is located in the protective shell, the variable frequency motor (51) is connected with the centrifugal fan (52), and the variable frequency motor (51) can drive the centrifugal fan (52) to rotate so as to discharge gas in the guide shell (2).
7. Nitriding furnace according to claim 1, characterized in that the nitriding furnace further comprises a plurality of supports (6), one end of each support (6) is connected to the furnace shell (1), and the other end of each support (6) is connected to the draft tube (2).
8. Nitriding furnace according to claim 1, wherein the furnace shell (1) comprises a furnace body (11) and a furnace cover (12), wherein one end of the furnace body (11) is arranged in an open manner, the furnace cover (12) is fastened to the open end of the furnace shell (1), and the other end of the furnace body (11) is provided with the medium inlet.
9. Nitriding furnace according to claim 8, characterized in that the furnace body (11) is a heat-insulated furnace body and the furnace lid (12) is a heat-insulated furnace lid.
10. Nitriding furnace according to claim 1, characterized in that the number of the medium inlets is at least two, each of which is in communication with the communication chamber (10).
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| CN202011280048.4A CN112210745A (en) | 2020-11-16 | 2020-11-16 | Nitriding furnace |
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| CN202011280048.4A CN112210745A (en) | 2020-11-16 | 2020-11-16 | Nitriding furnace |
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| CN113307352A (en) * | 2021-06-07 | 2021-08-27 | 华东理工大学 | Device and method for enhancing oxidation of sulfur-containing wastewater |
| CN115507289A (en) * | 2022-09-19 | 2022-12-23 | 浙江天辰测控科技股份有限公司 | Stagnation container and gas meter detection device |
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