Furnace rear anti-oxidation sealing structure of sintering furnace

Abstract

The invention discloses a rear anti-oxidation sealing structure of a sintering furnace, relates to the technical field of sintering furnaces, and solves the technical problems that the rear anti-oxidation sealing structure of an existing sintering furnace is not ideal in sealing performance and easy to leak in the use process. Comprising two sintering furnace air inlet pipe sections, one section is arranged on a sintering furnace body, and the end of each sintering furnace air inlet pipe section is sleeved with an assembly disc; the electric valve is arranged between the two sections of sintering furnace air inlet pipes and comprises a valve pipe body, a first flange plate and a second flange plate, the two ends of the valve pipe body are sleeved with the first flange plate and the second flange plate, and mounting grooves are formed in the side faces of the first flange plate and the second flange plate; the limiting assembly comprises an annular base arranged on the inner wall of the top face of each mounting groove, and a plurality of clamping notches distributed in a circle are formed in the inner wall face of each annular base; by means of the design, the sealing performance of the connecting part is remarkably enhanced, the leakage problem in the using process is effectively avoided, and therefore materials in the furnace are prevented from being affected by oxidation.

Description

Technical Field

[0001] The invention belongs to the technical field of sintering furnaces, and in particular relates to a post-furnace anti-oxidation sealing structure of a sintering furnace. Background Art

[0002] Sintering furnace is a key equipment in the key process of metallurgical production. The sintering temperature is generally above 800℃. In order to prevent the workpiece from oxidation during high-temperature sintering and improve the sintering performance of the workpiece, a protective gas is generally introduced into the sintering furnace core tube during the sintering process. The commonly used protective gas is a nitrogen and hydrogen mixture. If the protective gas pressure is unstable during sintering, it will fluctuate and cause air to enter, which may easily cause surface oxidation of the product after it is out of the furnace, reducing the product processing quality and affecting product performance. In severe cases, the product may be scrapped. To solve this problem, the existing technology is to install a fire curtain belt behind the furnace to prevent air from entering the furnace and prevent product oxidation.

[0003] At present, in order to ensure that the sintering furnace can maintain an oxygen-free or low-oxygen environment during the sintering process, it is necessary to set anti-oxidation sealing structures on the furnace mouth, air inlet pipe and valve, exhaust pipe, heating chamber and other components. These sealing structures can effectively prevent oxygen from entering the furnace, thereby protecting the material from oxidation.

[0004] However, the existing anti-oxidation sealing structure behind the sintering furnace is prone to leakage during use due to the poor sealing performance of the connection between the air inlet pipe and the valve, which causes the materials in the furnace to be affected by oxidation. In addition, the lack of an effective limiting structure causes the valve to rotate easily during installation, which not only affects the smooth splicing of the valve and the air inlet pipe of the sintering furnace, but also makes the entire installation process time-consuming. Therefore, based on the above problems, we designed a anti-oxidation sealing structure behind the sintering furnace. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a post-furnace anti-oxidation sealing structure for a sintering furnace, which solves the problem that the post-furnace anti-oxidation sealing structure of the existing sintering furnace has unsatisfactory sealing performance and is prone to leakage during use. In addition, there is a lack of an effective limiting structure, which causes the valve to rotate easily during installation, thereby affecting the smooth splicing of the valve and the sintering furnace air inlet pipe, making the entire installation process time-consuming.

[0006] To achieve the above object, according to an embodiment of the first aspect of the present invention, a post-oxidation anti-sealing structure of a sintering furnace is provided, comprising two sections of an air inlet pipe for the sintering furnace, one section being arranged on the furnace body of the sintering furnace, and an assembly disk being sleeved at the end of each section of the air inlet pipe of the sintering furnace;

[0007] An electric valve is arranged between the air inlet pipes of the two-stage sintering furnace, and the electric valve comprises a valve tube body and a flange plate 1 and a flange plate 2 sleeved on both ends of the valve tube body, and the sides of the flange plate 1 and the flange plate 2 are provided with mounting grooves;

[0008] Also includes:

[0009] A position limiting assembly, the position limiting assembly comprising a ring seat arranged on the inner wall of the top surface of each mounting groove, and the inner wall surface of each ring seat is provided with a plurality of circularly distributed engaging notches;

[0010] A sealing assembly, the sealing assembly comprising a convex ring connected to the side of each assembly disk, a rubber ring 1 connected to the inner wall of the convex ring, and a rubber ring 2 sleeved on the outer wall of the convex ring;

[0011] The convex ring is divided into a head ring body and a tail ring body. The tail ring body is sleeved on the head ring body. The tail ring body is provided with a snap block matching each snap notch.

[0012] A further improvement is that a plurality of equally spaced fixing bolts are provided at the edges of the flange plate 1 and the flange plate 2.

[0013] A further improvement is that the end of each section of the sintering furnace air inlet pipe protrudes outward, and during installation, each section of the sintering furnace air inlet pipe and the inner walls of the interfaces on both sides of the valve pipe body are matched and plugged.

[0014] A further improvement is that after the second rubber ring is put on the head ring body, the side surface contacts the side surface of the tail ring body and the locking block.

[0015] A further improvement is that it also includes a detection component, which includes a mounting cover sleeved on both sides of the valve tube body, a cover plate sleeved on the air inlet pipe of each section of the sintering furnace and a detection module arranged on the mounting cover, and a mounting notch is arranged in the port of the mounting cover, and a rubber ring is arranged on the inner wall surface of the mounting notch.

[0016] A further improvement is that the inner wall surface of the rubber ring is provided with an internal thread, the cover plate is divided into an outer section and an inner section, the outer diameter of the inner section is smaller than the outer diameter of the outer section, the outer wall surface of the inner section of the cover plate is provided with an external thread matching the inner wall thread of the rubber ring, and the inner wall surface of the outer section of the cover plate is provided with an internal thread.

[0017] A further improvement is that the outer wall surface of each section of the sintering furnace air inlet pipe is provided with an external thread matching the inner wall thread of the outer section of the cover plate. After each cover plate is screwed onto the sintering furnace air inlet pipe, the inner section and the rubber ring are threadedly connected, the side of the outer section is in contact with the side of the rubber ring, and the edge of the cover plate is connected to the mounting cover by a number of circularly equidistantly distributed fixing bolts.

[0018] A further improvement is that the detection module is a gas detection induction switch, and a plurality of the gas detection induction switches are provided, each of which is circularly inlaid on the mounting cover, and the gas detection induction switch is electrically connected to an alarm, which is arranged in the control room.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention docks the flanges 1 and 2 on both sides of the electric valve with the assembly disk on each section of the sintering furnace air inlet pipe. During the docking process, the convex ring on the side of the assembly disk is clamped in the installation groove of the flanges 1 and 2, so that the snap-fit ​​blocks on the ring body of each convex ring tail section are accurately inserted into the multiple snap-fit ​​notches in each ring seat to form a stable limiting structure. This design effectively prevents the flanges 1 and 2 from rotating when they are spliced ​​with the assembly disk, thereby ensuring the smooth assembly of the connection parts and greatly improving the overall assembly efficiency.

[0021] (2) After the docking is completed, the outer wall of each rubber ring 2 fits in the port of the installation groove, the side fits in each ring seat, and the rubber ring 1 on the inner wall of the convex ring fits tightly in the bottom inner wall of the installation groove, achieving a double sealing effect. Finally, the flange 1 and the flange 2 are firmly connected to the two assembly plates respectively by fixing bolts. This design not only significantly enhances the sealing performance of the connection part and effectively avoids leakage problems during use, but also effectively prevents oxygen from entering the furnace, thereby ensuring that the sintering furnace can maintain an oxygen-free or low-oxygen environment during the sintering process.

[0022] (3) The present invention is also equipped with a detection component. When each cover plate is screwed onto the sintering furnace air inlet pipe through threads, the inner section of the cover plate is threadedly connected to the rubber ring, and the side of the outer section is in close contact with the side of the rubber ring. The edge of the cover plate is connected to the mounting cover through a plurality of fixing bolts evenly distributed on the circumference. At this time, the rubber ring again provides an additional sealing effect, further improving the sealing performance. At the same time, the detection module (gas detection sensor switch) will monitor in real time whether there is a leak. Once a leak is detected, it will immediately send a signal to the alarm in the control room, and the alarm will sound immediately, notifying the relevant personnel to come and deal with it in real time, so as to avoid the failure to deal with it in time after the leak, so that the protective material is affected by oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the sintering furnace and the sealing structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the overall structure of the sealing structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the limit assemblies installed at both ends of the electric valve of the present invention;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of a sealing component and a detection component on a section of an air inlet pipe of a sintering furnace close to one side of the sintering furnace of the present invention;

[0027] Figure 5 It is a schematic cross-sectional structure diagram of a sealing component and a detection component on a section of an air inlet pipe of a sintering furnace far away from a side of the sintering furnace of the present invention;

[0028] Figure 6 It is a schematic diagram of a cross-sectional structure of a flange plate on one side of a detection assembly and a valve body of the present invention;

[0029] Figure 7 It is a schematic diagram of the second cross-sectional structure of the detection assembly of the present invention and the flange on the other side of the valve body;

[0030] Figure 8 It is a schematic diagram of the structure of the ring seat and the convex ring after being plugged in.

[0031] Markings in the figure:

[0032] 1. Electric valve; 11. Valve body; 12. Flange 1; 13. Electric actuator; 14. Flange 2; 15. Fixing bolts; 101. Mounting groove;

[0033] 2. Sintering furnace body; 21. Assembly plate; 22. Sintering furnace air inlet pipe; 23. Furnace door;

[0034] 3. Sealing assembly; 31. Rubber ring 1; 32. Rubber ring 2; 33. Protruding ring; 301. Head ring body; 302. Tail ring body; 303. Clamping block;

[0035] 4. Limiting assembly; 41. Ring seat; 42. Engaging notch;

[0036] 5. Detection component; 51. Installation cover; 52. Cover plate; 53. Detection module; 501. Installation notch; 502. Rubber ring; 503. Outer section; 504. Inner section. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 and Figure 2As shown, a post-furnace anti-oxidation sealing structure of a sintering furnace comprises an air inlet pipe 22 for the sintering furnace, which is arranged on a furnace body 2 of the sintering furnace. The air inlet pipe 22 for the sintering furnace is divided into two sections, and an assembly plate 21 is sleeved at the end of each section of the air inlet pipe 22 for the sintering furnace.

[0039] The electric valve 1 is arranged between the air inlet pipes 22 of the two-stage sintering furnace. The electric valve 1 comprises an electric actuator 13, a valve tube body 11, and a flange 12 and a flange 2 14 sleeved on both sides of the valve tube body 11. A plurality of equally spaced fixing bolts 15 are arranged at the edges of the flange 12 and the flange 2 14. When installing, the flange 12 and the flange 2 14 on both sides of the electric valve 1 are fixedly connected to each assembly plate 21 by the fixing bolts 15 to achieve disassembly and assembly;

[0040] It should be explained that the control of opening and closing of the electric valve 1 is a prior art, and the working principle is public, so it will not be described in detail in this embodiment;

[0041] like Figures 2 to 8 As shown, the implementation also includes:

[0042] The side surfaces of the stopper assembly 4, the flange 12 and the flange 2 14 are all provided with mounting grooves 101. The stopper assembly 4 includes a ring seat 41 arranged on the inner wall of the top surface of each mounting groove 101. The inner wall surface of each ring seat 41 is provided with a plurality of circularly distributed engaging notches 42.

[0043] Specifically, the end of each section of the sintering furnace air inlet pipe 22 protrudes outward, and during installation, each section of the sintering furnace air inlet pipe 22 and the inner walls of the interfaces on both sides of the valve tube body 11 are matched and plugged;

[0044] The sealing assembly 3 includes a convex ring 33 connected to the side of each assembly plate 21, a rubber ring 1 31 connected to the inner wall of the convex ring 33, and a rubber ring 2 32 sleeved on the outer wall of the convex ring 33;

[0045] Specifically, the convex ring 33 is divided into a head ring body 301 and a tail ring body 302. The tail ring body 302 is sleeved on the head ring body 301. The tail ring body 302 is provided with a snap-fit ​​block 303 that matches each snap-fit ​​notch 42. When the flange 12 and the flange 2 14 on both sides of the electric valve 1 are respectively docked with the assembly disk 21 on the air inlet pipe 22 of each sintering furnace. During the docking process, the convex ring 33 on the side of the assembly disk 21 is stuck in the installation groove 101 of the flange 12 and the flange 2 14, so that the snap-fit ​​block 303 on the tail ring body 302 of each convex ring 33 is accurately inserted into the multiple snap-fit ​​notches 42 in each ring seat 41 to form a stable limiting structure. This design effectively prevents the flange 1 12 and the flange 2 14 from rotating with the assembly disk 21 during splicing, thereby ensuring the smooth assembly of the connection parts and greatly improving the overall assembly efficiency;

[0046] Specifically, as a preferred embodiment, the rubber ring 2 32 is sleeved on the head ring body 301, and the side surfaces are in contact with the side surfaces of the tail ring body 302 and the locking block 303. When the above-mentioned flange 12 and flange 2 14 are respectively docked with the assembly disk 21 on the air inlet pipe 22 of each section of the sintering furnace, the outer wall of each rubber ring 2 32 fits in the port of the mounting groove 101, and the side surface fits in each ring seat 41. The rubber ring 1 31 on the inner wall of the convex ring 33 fits tightly against the bottom inner wall of the mounting groove 101, thereby achieving a double sealing effect. Finally, the flange 12 and the flange 2 14 are respectively firmly connected to the two assembly disks 21 by fixing bolts 15. This design not only significantly enhances the sealing performance of the connection parts and effectively avoids leakage problems during use, but also effectively prevents oxygen from entering the furnace, thereby ensuring that the sintering furnace can maintain an oxygen-free or low-oxygen environment during the sintering process;

[0047] like Figures 4 to 7 As shown, in this embodiment, an implementation scheme is also provided, including a detection component 5, the detection component 5 includes a mounting cover 51 sleeved on both sides of the valve tube body 11, a cover plate 52 sleeved on each section of the sintering furnace inlet pipe 22 and a detection module 53 arranged on the mounting cover 51, a mounting notch 501 is arranged in the port of the mounting cover 51, and a rubber ring 502 is arranged on the inner wall surface of the mounting notch 501.

[0048] Specifically, the inner wall surface of the rubber ring 502 is provided with an internal thread, the cover plate 52 is divided into an outer section 503 and an inner section 504, the outer diameter of the inner section 504 is smaller than the outer diameter of the outer section 503, the outer wall surface of the inner section 504 of the cover plate 52 is provided with an external thread matching the inner wall thread of the rubber ring 502, the inner wall surface of the outer section 503 of the cover plate 52 is provided with an internal thread, the outer wall surface of each section of the sintering furnace inlet pipe 22 is provided with an external thread matching the inner wall thread of the outer section 503 of the cover plate 52, and each cover plate 52 thread After being screwed onto the sintering furnace air inlet pipe 22, the inner section 504 is threadedly connected to the rubber ferrule 502, the side of the outer section 503 is in contact with the side of the rubber ferrule 502, and the edge of the cover plate 52 is connected to the mounting cover 51 through a number of circularly equidistantly distributed fixing bolts 15. When each cover plate 52 is screwed onto the sintering furnace air inlet pipe 22, the inner section 504 of the cover plate 52 is threadedly connected to the rubber ferrule 502, and the side of the outer section 503 is in close contact with the side of the rubber ferrule 502. The edge of the cover plate 52 is connected to the mounting cover 51 through a number of fixing bolts 15 evenly distributed on the circumference, and at this time, the rubber ferrule 502 again provides an additional sealing effect, further improving the sealing performance;

[0049] Specifically, the detection module 53 is a gas detection induction switch, and there are several gas detection induction switches, which are respectively circularly inlaid on the mounting cover 51. The gas detection induction switch is electrically connected to an alarm, which is arranged in the control room. The gas detection induction switch of the detection module 53 monitors in real time whether there is a leak. Once a leak is detected, it will immediately send a signal to the alarm in the control room, and the alarm will sound immediately, notifying relevant personnel to come and handle it in real time, so as to avoid the protection material being affected by oxidation due to the inability to handle it in time after the leak.

[0050] like Figures 1 to 8 As shown, in this embodiment, the sintering furnace also includes a sintering furnace body 2, a furnace door 23 and other equipment components, which are selectively installed and used together before implementation. In addition, it should be noted that this application document only targets the anti-oxidation sealing structure behind the existing sintering furnace. Since the sealing performance of the connection between the air inlet pipe and the valve is not ideal, leakage is prone to occur during use, which causes the material in the furnace to be affected by oxidation. In addition, the lack of an effective limiting structure causes the valve to rotate easily during installation, which not only affects the smooth splicing of the valve and the air inlet pipe of the sintering furnace, but also makes the entire installation process time-consuming. Improvements are made, and no other improvements are involved; the working principle of the anti-oxidation sealing structure behind the sintering furnace is introduced as follows:

[0051] When the present invention is used, the on-site operator first docks the flange 12 and the flange 2 14 on both sides of the electric valve 1 with the assembly disk 21 on each section of the sintering furnace air inlet pipe 22. During the docking process, the side convex ring 33 of the assembly disk 21 is stuck in the installation groove 101 of the flange 12 and the flange 2 14, so that the snap-fit ​​block 303 on the tail ring body 302 of each convex ring 33 is accurately inserted into the multiple snap-fit ​​notches 42 in each ring seat 41, forming a stable limiting structure. This design effectively prevents the flange 1 12 and the flange 2 14 from rotating when splicing with the assembly disk 21, thereby ensuring the smooth assembly of the connection parts and greatly improving the overall assembly efficiency.

[0052] After the docking is completed, the outer wall of each rubber ring 2 32 fits in the port of the installation groove 101, the side fits in each ring seat 41, and the rubber ring 1 31 on the inner wall of the convex ring 33 fits tightly in the bottom inner wall of the installation groove 101, achieving a double sealing effect. Finally, the flange 12 and the flange 2 14 are firmly connected to the two assembly plates 21 respectively through the fixing bolts 15. This design not only significantly enhances the sealing performance of the connection part and effectively avoids leakage problems during use, but also effectively prevents oxygen from entering the furnace, thereby ensuring that the sintering furnace can maintain an oxygen-free or low-oxygen environment during the sintering process.

[0053] In addition, the present invention is also equipped with a detection component 5. When each cover plate 52 is screwed onto the sintering furnace air inlet pipe 22 by means of threads, the inner section 504 of the cover plate 52 is threadedly connected to the rubber ring 502, and the side of the outer section 503 is in close contact with the side of the rubber ring 502. The edge of the cover plate 52 is connected to the mounting cover 51 by a plurality of fixing bolts 15 evenly distributed on the circumference. At this time, the rubber ring 502 again provides an additional sealing effect, further improving the sealing performance. At the same time, the detection module 53 (gas detection induction switch) monitors in real time whether there is a leak. Once a leak is detected, it will immediately send a signal to the alarm in the control room, and the alarm will sound immediately, notifying the relevant personnel to come and deal with it in real time, so as to avoid the failure to deal with it in time after the leak, so that the protective material is affected by oxidation.

[0054] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A post-oxidation anti-sealing structure of a sintering furnace, comprising: Two sections of sintering furnace air inlet pipes (22), one section is arranged on the sintering furnace body (2), and an assembly plate (21) is sleeved at the end of each section of the sintering furnace air inlet pipe (22); An electric valve (1) is arranged between two sections of an air inlet pipe (22) of a sintering furnace. The electric valve (1) comprises a valve tube body (11) and a flange plate 1 (12) and a flange plate 2 (14) sleeved on both ends of the valve tube body (11). The side surfaces of the flange plate 1 (12) and the flange plate 2 (14) are both provided with mounting grooves (101); It is characterized by further comprising: A position limiting assembly (4), the position limiting assembly (4) comprising a ring seat (41) arranged on the inner wall of the top surface of each mounting groove (101), and the inner wall surface of each ring seat (41) is provided with a plurality of circularly distributed engaging notches (42); A sealing assembly (3), the sealing assembly (3) comprising a convex ring (33) connected to the side of each assembly disk (21), a rubber ring (31) connected to the inner wall of the convex ring (33), and a rubber ring (32) sleeved on the outer wall of the convex ring (33); The convex ring (33) is divided into a head ring body (301) and a tail ring body (302); the tail ring body (302) is sleeved on the head ring body (301); and the tail ring body (302) is provided with a snap-fit ​​block (303) matching each snap-fit ​​notch (42).

2. The anti-oxidation sealing structure after the sintering furnace according to claim 1 is characterized in that: A plurality of fixing bolts (15) distributed at equal distances are arranged at the edges of the flange plate 1 (12) and the flange plate 2 (14).

3. The anti-oxidation sealing structure after the sintering furnace according to claim 1, characterized in that: The end of each section of the sintering furnace air inlet pipe (22) protrudes outwards. During installation, each section of the sintering furnace air inlet pipe (22) and the inner walls of the interfaces on both sides of the valve pipe body (11) are matched and plugged.

4. The anti-oxidation sealing structure after the sintering furnace according to claim 1, characterized in that: After the second rubber ring (32) is sleeved on the head ring body (301), the side surface thereof contacts the side surface of the tail ring body (302) and the locking block (303).

5. The anti-oxidation sealing structure behind a sintering furnace according to claim 1, characterized in that: The invention also includes a detection component (5), wherein the detection component (5) includes a mounting cover (51) sleeved on both sides of the valve tube body (11), a cover plate (52) sleeved on the air inlet pipe (22) of each section of the sintering furnace, and a detection module (53) arranged on the mounting cover (51), wherein a mounting notch (501) is arranged in the port of the mounting cover (51), and a rubber ring (502) is arranged on the inner wall surface of the mounting notch (501).

6. The anti-oxidation sealing structure after the sintering furnace according to claim 5, characterized in that: The inner wall surface of the rubber ring (502) is provided with an internal thread, the cover plate (52) is divided into an outer section (503) and an inner section (504), the outer diameter of the inner section (504) is smaller than the outer diameter of the outer section (503), the outer wall surface of the inner section (504) of the cover plate (52) is provided with an external thread matching the inner wall thread of the rubber ring (502), and the inner wall surface of the outer section (503) of the cover plate (52) is provided with an internal thread.

7. The anti-oxidation sealing structure after the sintering furnace according to claim 6, characterized in that: The outer wall surface of each section of the sintering furnace air inlet pipe (22) is provided with an external thread matching the inner wall thread of the outer section (503) of the cover plate (52). After each cover plate (52) is screwed onto the sintering furnace air inlet pipe (22), the inner section (504) and the rubber ring (502) are threadedly connected, and the side surface of the outer section (503) is in contact with the side surface of the rubber ring (502). The edge of the cover plate (52) is connected to the mounting cover (51) by a plurality of fixing bolts (15) equidistantly distributed in a circular shape.

8. The anti-oxidation sealing structure after the sintering furnace according to claim 6, characterized in that: The detection module (53) is a gas detection induction switch. A plurality of gas detection induction switches are provided and are respectively inlaid in a circular shape on the mounting cover (51). The gas detection induction switch is electrically connected to an alarm, which is provided in the control room.

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