Hydrogen sintering furnace convenient to clean

Abstract

The application relates to the technical field of sintering furnaces, and discloses a hydrogen sintering furnace convenient to clean, which comprises a sintering furnace body, a fixed pipeline, a fixed pipeline fixedly installed on the sintering furnace body and communicated with a gas outlet, and an inert gas inlet device connected with the fixed pipeline; a first sleeve pipe sleeved outside the fixed pipeline; a second sleeve pipe sleeved inside the first sleeve pipe, wherein the second sleeve pipe and the fixed pipeline have the same inner diameter; an exhaust pipe comprising a horizontal section and a vertical section which are connected with each other; a support, wherein the exhaust pipe is installed on the support, and a gas combustion mechanism is installed on the support; a mixing assembly installed in the second sleeve pipe, comprising a fixed rod and helical blades fixedly installed on the outer rod wall of the fixed rod, wherein the helical blades are sealingly attached to the inner wall of the second sleeve pipe; and a driving rod, wherein when the first sleeve pipe slides away from the exhaust pipe, the driving rod is detachably connected with the fixed rod, and rotating the driving rod drives the mixing assembly to move in the axial direction of the pipeline. The application can reduce the difficulty of removing accumulated dust in the pipeline.

Description

Technical Field

[0001] This application relates to the technical field of sintering furnaces, and in particular to a hydrogen sintering furnace that is easy to clean. Background Technology

[0002] In the field of metal sintering, hydrogen sintering furnaces are widely used in the production of precision metal parts and powder metallurgy products because hydrogen has excellent reducing properties, effectively removing the oxide layer from the surface of metal materials and improving the purity and performance of sintered products. During normal operation, hydrogen is continuously introduced into the furnace as a protective and reducing atmosphere. After sintering, hydrogen-containing exhaust gas is discharged under furnace pressure. To eliminate the safety hazards of hydrogen's flammability and explosiveness, the exhaust gas is usually combusted to fully oxidize the hydrogen into water vapor before being released, ensuring the safety and environmental friendliness of the exhaust gas treatment.

[0003] However, in the actual sintering process, a small amount of fine metal dust will inevitably be generated when the metal material in the furnace is sintered at high temperature. This part of the metal dust will be discharged from the outlet of the hydrogen sintering furnace along with the hydrogen-containing tail gas and enter the tail gas conveying and treatment pipeline.

[0004] In existing technologies, for the treatment of metal dust in the exhaust gas of hydrogen sintering furnaces, a filter structure and an inert gas mixing component are sequentially installed along the gas conveying direction in the exhaust gas conveying pipeline of the hydrogen sintering furnace. Inert gas is introduced between the filter structure and the inert gas mixing component to appropriately dilute the hydrogen concentration. Most of the dust is intercepted by the filter screen. However, in long-term use, dust will also accumulate in the conveying pipeline downstream of the filter screen and on the inert gas mixing component. This reduces the cross-sectional area of ​​the exhaust gas flowing in the pipeline, resulting in poor exhaust gas discharge, which in turn affects the normal operating pressure of the hydrogen sintering furnace and increases the safety risks of backfire and deflagration. Therefore, the exhaust gas conveying pipeline needs to be cleaned regularly. When cleaning the pipeline, the entire pipeline needs to be disassembled and the components inside the pipeline need to be cleaned, and the cleaning difficulty needs to be reduced. Summary of the Invention

[0005] To reduce the difficulty of cleaning ash buildup inside pipes, this application provides a hydrogen sintering furnace that is easy to clean.

[0006] This application provides a hydrogen sintering furnace that is easy to clean, using the following technical solution:

[0007] A hydrogen sintering furnace that is easy to clean includes:

[0008] The sintering furnace body has an air outlet at the bottom;

[0009] A fixed pipe is fixedly installed on the sintering furnace body and connected to the gas outlet. The fixed pipe is connected to an inert gas inlet device.

[0010] The first sleeve is fitted onto the outside of the fixed pipe and makes a sealed sliding contact with the fixed pipe;

[0011] The exhaust pipe includes a horizontal section and a vertical section that are connected to each other, and the opening of the horizontal section is sealed to the first sleeve.

[0012] The second sleeve is fitted inside the first sleeve. The horizontal section of the exhaust pipe has the same inner diameter as the second sleeve. When one end of the second sleeve abuts against the end of the fixed pipe, the other end is left with a gap from the exhaust pipe. The inner diameter of the second sleeve is the same as that of the fixed pipe.

[0013] The bracket has a vertical section of the exhaust pipe that is detachably mounted on it, and a gas combustion mechanism is mounted on the bracket.

[0014] A mixing assembly, installed inside the second sleeve, includes a fixing rod and a spiral blade fixedly installed on the outer wall of the fixing rod, wherein the spiral blade is sealed and fitted to the inner wall of the second sleeve.

[0015] The drive rod and the fixed rod are detachably connected when the first sleeve slides away from the exhaust pipe. Rotating the drive rod drives the mixing assembly to move along the axial direction of the pipe.

[0016] By adopting the above technical solution, the gas outlet of the sintering furnace body is connected to a fixed pipe. The fixed pipe and the exhaust pipe are connected by a first sleeve, and a second sleeve is located inside the first sleeve. The mixing component is located inside the second sleeve. After the first sleeve slides away from the exhaust pipe along the outer wall of the fixed pipe, the drive rod and the fixed rod are connected. When the drive rod drives the fixed rod to rotate, the spiral blades rotate accordingly, causing the spiral blades to move spirally along the inner wall of the second sleeve and the fixed pipe, performing 360° circumferential scraping of the dust accumulated on the inner wall of the pipe. Compared with linear scraping, this method is more thorough in cleaning, less prone to jamming, and has more stable operating resistance. The inner walls of the fixed pipe, the first sleeve, the second sleeve, and the horizontal and vertical sections of the exhaust pipe are all smooth inner pipe walls, which facilitates dust cleaning. The exhaust pipe can be detachably installed on the support. With the help of the gas combustion mechanism on the support, the discharged hydrogen can be safely ignited. This allows the entire device to have multiple functions, including appropriate dilution of hydrogen concentration, safe combustion of hydrogen, and dust cleaning, thereby improving the safety of the hydrogen sintering furnace and the convenience of pipeline maintenance.

[0017] Optionally, the first sleeve includes:

[0018] The outer sleeve is slidably installed on the outer wall of the fixed pipe;

[0019] The connecting ring is coaxially arranged with the outer sleeve and forms a sealed fit with the end of the exhaust pipe;

[0020] An inner sleeve is fixedly installed on the inner ring surface of the connecting ring. The end of the fixed pipe is provided with an annular groove for accommodating the inner sleeve to slide in. The end of the inner sleeve near the fixed pipe is always located in the annular groove. The outer wall of the second sleeve is attached to the inner wall of the inner sleeve.

[0021] By adopting the above technical solution, the outer sleeve slides on the outer wall of the fixed pipe to achieve overall axial displacement, and one end of the inner sleeve is always located in the annular groove at the end of the fixed pipe, ensuring continuous radial positioning and circumferential sealing during the sliding process; the connecting ring is sealed and fitted to the end of the exhaust pipe, limiting the maximum travel of the first sleeve; one end of the second sleeve abuts against the fixed pipe and fits against the inner wall of the inner sleeve, further sealing the connection between the first sleeve and the fixed pipe; when the first sleeve is connected to the fixed pipe and the exhaust pipe respectively, the inner sleeve part leaves the annular groove, and there is also a gap between the inner sleeve and the outer sleeve. Therefore, the annular groove and the gap between the inner sleeve and the outer sleeve also have a heat insulation effect; when the fixed pipe needs to be cleaned, when the first sleeve slides away from the exhaust pipe, the inner sleeve and the second sleeve slide relative to each other, and the second sleeve has a scraping effect on the outer wall of the inner sleeve.

[0022] Optionally, the fixed pipe is externally threaded with a retaining ring, and one end of the outer sleeve is connected to a flange. The flange and the retaining ring are connected by bolts for sealing.

[0023] By adopting the above technical solution, the fixing ring outside the fixed pipe is fixed to the flange of the first sleeve by bolts. The first sleeve can be locked and positioned in the state of non-cleaning and normal exhaust of the device. The threaded fixing ring can adjust the axial position to adapt to different assembly gaps, which not only ensures the structural stability under normal working conditions, but also allows the locking to be released for sliding operation when cleaning is required.

[0024] Optionally, the second sleeve is provided with a dust collection part at one end face near the exhaust pipe. The dust collection part has a dust collection groove with the opening facing upwards, and the spiral blade can move into the dust collection groove.

[0025] By adopting the above technical solution, when the fixed pipe needs to be cleaned, when the first sleeve slides away from the exhaust pipe, and the inner sleeve and the second sleeve slide relative to each other, the dust scraped off the inner wall of the inner sleeve can fall into the dust collection trough. This reduces the leakage of dust during the sliding process of the first sleeve, and causes the spiral blades to move spirally along the inner wall of the second sleeve and the fixed pipe, scraping the dust on the inner wall of the pipe in a 360° circumferential direction. When the spiral blades move outward, they eventually carry the dust into the second sleeve, and the dust collection section achieves a unified dust collection effect.

[0026] Optionally, a filter structure is also included, which can be slidably installed within the fixed pipe; the filter structure includes:

[0027] The mounting cylinder is installed coaxially with the fixed pipe;

[0028] Filter screens are spaced apart inside the mounting cylinder;

[0029] A through rod passes through the mounting cylinder and the filter screen. The through rod is fixedly connected to the mounting cylinder via a connecting rod, and the through rod and the fixing rod are detachably connected.

[0030] By adopting the above technical solution, the multi-layer filter screen is arranged at intervals to filter impurities in the exhaust gas in multiple stages, so as to minimize the amount of dust entering the exhaust pipe and combustion device. The inner wall of the installation cylinder can play a dust accumulation role, reducing the dust accumulation area of ​​the fixed pipeline. The through rod and the fixed rod are detachably connected, which can drive the filter structure to move simultaneously when the driving spiral blade is cleaning dust, realizing the linkage between filtration and pipeline cleaning, and making it easy to move the entire filter structure out of the fixed pipeline for cleaning or replacement.

[0031] Optionally, the through rod has an installation groove on its wall, in which a compression spring and the insert block are installed. A sleeve is slidably installed on the through rod. When the sleeve covers the installation groove, the insert block compresses the compression spring and is located within the installation groove. The fixing rod has a groove for inserting the through rod, and a slot for inserting the insert block is formed on the inner wall of the groove. When the fixing rod moves toward the filter structure, it pushes the sleeve to slide, and the insert block is inserted into the slot, thus connecting the through rod and the fixing rod.

[0032] By adopting the above technical solution, the through rod achieves automatic insertion and locking with the fixed rod through the compression spring, the insert block, the sleeve and the fixed rod: when the fixed rod moves towards the filter structure, it pushes the sleeve to slide, releasing the obstruction of the insert block, and the compression spring pushes the insert block into the slot of the fixed rod groove, realizing a quick and reliable connection between the through rod and the fixed rod.

[0033] Optionally, a corrugated pipe is coaxially sleeved on the outer wall of the mounting cylinder. One end of the corrugated pipe is fixedly connected to the end of the mounting cylinder, and the other end of the corrugated pipe is connected to a slip ring. When the slip ring slides on the mounting cylinder, the crest of the corrugated pipe and the inner wall of the fixed pipe form a close fit.

[0034] By adopting the above technical solution, the axial sliding of the slip ring causes the bellows to expand and contract. The bellows on the outer wall of the mounting cylinder cooperate with the slip ring, so that the crests fit against the inner wall of the fixed pipe, so that all the air outlets are filtered by the filter screen through the mounting cylinder as much as possible. When the slip ring leaves the fixed pipe, the bellows is stretched and the outer diameter becomes smaller, which makes it easier for the entire mounting cylinder to leave the fixed pipe. Before installing the filter structure, the slip ring is first slid onto the mounting cylinder, leaving a small gap between the bellows and the inner wall of the fixed pipe, or it can be directly slid into the fixed pipe near the air outlet while adhering to the inner wall of the fixed pipe.

[0035] Optionally, the through rod includes a first rod portion and a second rod portion. The first rod portion is located inside the sleeve and fixedly connected to the sleeve. One end of the first rod portion is inserted into the second rod portion, and the second rod portion and the slip ring are connected. The sleeve and the insert block are installed on the second rod portion. A slider is fixedly connected to the first rod portion. The slider can slide inside the second rod portion. A limit block is connected to the end of the second rod portion. The limit block restricts the slider from leaving the second rod portion. When the fixed rod pulls the second rod portion, the second rod portion pulls the slip ring away from the sleeve, and the slider and the limit block abut against each other.

[0036] By adopting the above technical solution, the rod is divided into a first rod part and a second rod part. The extension and retraction are achieved by the cooperation of the slider and the limiting block. When the fixed rod pulls the second rod part, it can first drive the slip ring to move synchronously and stretch the bellows, causing the outer diameter of the bellows to deform. After the slip ring leaves the mounting cylinder, the second rod part continues to move until the slider and the limiting block abut, and then the filter structure can be pulled to move in the direction of air outlet.

[0037] Optionally, multiple corrugated filter tubes are coaxially sleeved inside the mounting cylinder, and multiple sets are distributed along the axial direction of the mounting cylinder. The ends of the filter tubes abut against the filter screen, and the walls of the filter tubes have a hollow structure.

[0038] By adopting the above technical solution, multiple sets of axially distributed corrugated filter tubes are installed inside the installation cylinder. The hollow tube walls of the filter tubes, together with the filter screen, form a three-dimensional multi-stage filtration, increasing the filtration area and improving filtration efficiency and service life.

[0039] In summary, this application includes at least one of the following beneficial effects:

[0040] 1. During normal use, the device achieves sealed exhaust, multi-stage filtration, hydrogen concentration reduction and hydrogen combustion. During cleaning, the spiral blades move spirally along the pipeline, scraping the dust on the pipeline wall in 360° without dead angles. The resistance is stable and not easy to get stuck. At the same time, the dust is collected. Some pipelines can be cleaned without disassembly.

[0041] 2. The filter structure is sealed and fitted to the pipeline to ensure that all exhaust gas is filtered, guaranteeing sufficient filtration and good airtightness. During cleaning, the mixing component and the filter structure work together, and when cleaning the inner wall of the pipe, the filter structure can be moved away from the fixed pipeline at the same time, realizing the integration of pipeline cleaning and filter structure maintenance. This avoids secondary pollution caused by the separation of cleaning and filter structure treatment, and simplifies the operation process. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0043] Figure 2This is a cross-sectional schematic diagram of the connection between the fixed pipe and the first sleeve in an embodiment of this application;

[0044] Figure 3 This is a cross-sectional view of the fixed pipe and the first sleeve according to an embodiment of this application;

[0045] Figure 4 This is a schematic diagram illustrating the state of the first sleeve when it leaves the exhaust pipe, according to an embodiment of this application.

[0046] Figure 5 This is a cross-sectional view illustrating the drive rod and the fixed connection in an embodiment of this application;

[0047] Figure 6 This is a schematic diagram illustrating the connection between the fixed rod and the through rod in an embodiment of this application;

[0048] Figure 7 This is a schematic diagram of the overall structure of the filtering structure according to an embodiment of this application;

[0049] Figure 8 This is a schematic diagram illustrating the specific connection structure of the fixed rod and the through rod in an embodiment of this application;

[0050] Figure 9 yes Figure 8 Enlarged view of point A;

[0051] Figure 10 This is a cross-sectional view illustrating the installation of a filter cartridge inside an installation cylinder, as shown in an embodiment of this application.

[0052] Explanation of reference numerals in the attached drawings: 100, sintering furnace body; 110, support; 200, fixed pipe; 210, gas supply pipe; 220, annular groove; 230, fixing ring; 300, first sleeve; 310, outer sleeve; 311, flange; 320, connecting ring; 330, inner sleeve; 400, exhaust pipe; 410, horizontal section; 420, vertical section; 500, gas combustion mechanism; 510, ignition part; 600, second sleeve; 610, dust collection part; 611, dust collection trough; 700, mixing assembly; 710, fixing rod; 71 1. Groove; 712. Slot; 713. Insertion hole; 714. Unlocking hole; 720. Spiral blade; 800. Drive rod; 810. Sub-rod; 900. Filter structure; 910. Mounting cylinder; 911. Bellows; 912. Slip ring; 913. Connecting rod; 920. Filter screen; 930. Through rod; 931. Connecting rod; 932. Mounting groove; 933. Compression spring; 934. Insert block; 935. Sleeve; 940. First rod part; 941. Slider; 950. Second rod part; 951. Limiting block; 960. Filter tube. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1 -Appendix Figure 10This application will be described in further detail.

[0054] This application discloses a hydrogen sintering furnace that is easy to clean. (See also...) Figure 1 A hydrogen sintering furnace designed for easy cleaning includes a furnace body 100. An outlet is located at the bottom of the furnace body 100 to discharge hydrogen-containing exhaust gas after sintering. The flowing exhaust gas carries a small amount of metal dust. A horizontally extending fixed pipe 200 is fixedly connected to the bottom of the furnace body 100. The fixed pipe 200 is sequentially connected to a first sleeve 300 and an exhaust pipe 400 along the exhaust direction of the exhaust gas. An inert gas inlet device is also connected to the fixed pipe 200. The inert gas inlet device includes a gas supply pipe 210. One end of the gas supply pipe 210 is connected to the interior of the fixed pipe 200, and the other end is connected to an inert gas storage tank (not shown in the figure). Inert gas can be introduced into the fixed pipe 200 to dilute the hydrogen concentration and reduce the risk of flammability and explosion.

[0055] Reference Figure 2 and Figure 3 The first sleeve 300 specifically consists of an outer sleeve 310, a connecting ring 320, and an inner sleeve 330. The outer sleeve 310 is directly slidably fitted onto the outer wall of the fixed pipe 200. The outer ring surface of the connecting ring 320 is coaxially fixed with the outer sleeve 310, and the inner sleeve 330 is fixedly installed on the inner ring surface of the connecting ring 320. A gap is left between the outer sleeve 310 and the inner sleeve 330. An annular groove 220 adapted to the inner sleeve 330 is opened at the end of the fixed pipe 200. The end of the inner sleeve away from the connecting ring 320 is always located in the annular groove 220, realizing radial positioning and circumferential sealing during the sliding process.

[0056] Reference Figure 3 The outer wall of the fixed pipe 200 is threaded with a retaining ring 230. Both ends of the outer sleeve 310 are fixedly connected with flanges 311. A sealing gasket is embedded on the end face of the retaining ring 230 to increase the fit between the flange 311 and the retaining ring 230. The flange 311 and the retaining ring 230 are fixedly connected by bolts and nuts. By adjusting the thread position of the retaining ring 230 on the fixed pipe 200, different assembly gaps can be accommodated to achieve precise positioning of the first sleeve 300.

[0057] When the fixed pipe and the first sleeve 300 are connected, the annular groove 220 of the fixed pipe 200 can provide heat insulation, and the gap between the inner and outer sliding sleeves can also provide heat insulation, thereby reducing the temperature of the outer wall of the fixed pipe 200 and the outer wall of the first sliding sleeve, and reducing the impact of high-temperature exhaust gas on the temperature of the workshop environment.

[0058] Reference Figure 1 and Figure 2The exhaust pipe 400 includes a horizontal section 410 and a vertical section 420 that are connected to each other, and the two are integrally formed or sealed and fixed. When the first sleeve 300 and the exhaust pipe 400 are connected, the inner sleeve 330 is located within the annular groove 220 at the maximum sliding stroke of the first sleeve 300. The outer sleeve 310 and the horizontal section 410 of the exhaust pipe 400 are sealed and connected by a flange 311, and one end of the connecting ring 320 can form a sealed fit with the end of the exhaust pipe 400.

[0059] Reference Figure 1 The exhaust pipe 400 is also equipped with a bracket 110, which is typically fixed to the ground and remains stationary. The vertical section 420 of the exhaust pipe 400 can be detachably mounted on the bracket 110 for easy disassembly and maintenance. A gas combustion mechanism 500 is also fixedly mounted on the bracket 110. This device corresponds to the vertical section 420 of the exhaust pipe 400 and ignites the emitted hydrogen-containing exhaust gas, oxidizing the hydrogen into water vapor before emission, thus eliminating safety hazards. The gas combustion mechanism 500 includes an ignition unit 510 located in the exhaust area. The ignition unit 510 maintains stable ignition and combustion. The gas combustion mechanism 500 also includes a flame detector and a hydrogen concentration detector to achieve real-time monitoring of the combustion status and leakage concentration. A flame arrester is detachably installed inside the vertical section 420 of the exhaust pipe 400 to prevent backfire. The hydrogen gas discharged from the hydrogen sintering furnace can be stably ignited and burned after passing through the flame arrester at the outlet. Combined with hydrogen concentration detection and safety interlock, this is a mature, safe and compliant exhaust gas treatment method. This application will not make any improvements and will not elaborate further.

[0060] Reference Figure 4 A second sleeve 600 is installed inside the first sleeve 300. The outer wall of the second sleeve 600 is tightly fitted to the inner wall of the inner sleeve 330, and the inner diameter of the inner wall of the second sleeve 600 is the same as that of the inner wall of the fixed pipe 200 and the inner wall of the horizontal section 410 of the exhaust pipe 400. When one end of the second sleeve 600 abuts against the end of the fixed pipe 200, the sealing effect is further improved. A certain gap is left between the other end of the second sleeve 600 and the exhaust pipe 400. The first sleeve 300 slides away from the exhaust pipe 400, and the gap between the first sleeve 300 and the exhaust pipe 400 allows the second sleeve 600 to slide away from the first sleeve 300. During cleaning, the second sleeve 600 moves away from the first sleeve 300.

[0061] Reference Figure 4 and Figure 5 A mixing assembly 700 is installed inside the second sleeve 600. The mixing assembly 700 consists of a fixed rod 710 and a spiral blade 720. The spiral blade 720 is fixedly installed on the outer wall of the fixed rod 710 and is sealed to the inner wall of the second sleeve 600. During the discharge of the hydrogen-containing tail gas after sintering, the stationary spiral blade 720 plays a mixing role between the inert gas and the hydrogen-containing tail gas.

[0062] Reference Figure 4 and Figure 5 When cleaning is required, the first sleeve 300 is slid along the direction of the sintering furnace body 100 to separate it from the exhaust pipe 400. One end of the fixing rod 710 is inserted into the drive rod 800. The drive rod 800 has a rectangular cross-section, and one end of the fixing rod 710 has a square insertion hole 713 for insertion. The drive rod 800 is composed of multiple interlocking sub-rods 810. A rotating shaft connects two sub-rods 810. One sub-rod 810 has a clearance groove for the other sub-rod 810 to rotate within a certain range (about 90°). The drive rod 800 can be deformed into a straight section or an L-shape.

[0063] Reference Figure 5 and Figure 6 After one end of the drive rod 800 is inserted into the fixed rod 710, the other end can always be located outside the fixed pipe 200. During use, the drive rod 800 is usually L-shaped, with the end of the drive rod 800 located outside the fixed pipe 200 serving as a handle to assist in the rotation of the drive rod 800. Rotating the drive rod 800 will drive the mixing component 700 to move spirally along the inner wall of the fixed pipe 200 and the second sleeve 600, completing the dust scraping.

[0064] Reference Figure 6 The second sleeve 600 has a dust collection part 610 on one end face, located at the end away from the fixed pipe 200. The dust collection part 610 has an upward-facing dust collection groove 611. When the spiral blade 720 moves spirally into the dust collection groove 611, the scraped dust can be collected in the dust collection groove 611. When the first sleeve 300 leaves the exhaust pipe 400, the first sleeve 300 and the second sleeve 600 slide relative to each other, and the accumulated dust on the inner wall of the second sleeve 600 is also scraped off, mostly falling into the dust collection groove 611, thus improving the dust collection effect.

[0065] Reference Figure 6 and Figure 7 To filter metal dust in the exhaust gas, this device is also equipped with a filter structure 900, which includes an installation cylinder 910, filter screens 920, and a through rod 930. The installation cylinder 910 is coaxially installed with the fixed pipe 200 at one end of the fixed pipe 200 near the exhaust port. The filter screens 920 are spaced apart inside the installation cylinder 910 to achieve multi-stage filtration. The through rod 930 passes through the installation cylinder 910 and all the filter screens 920. The filter screens 920 and the through rod 930 are fixedly connected. The end of the through rod 930 is fixedly inserted into the installation cylinder 910 through a connecting rod 931, so that the filter screens 920 and the installation cylinder 910 form a whole.

[0066] Reference Figure 6 and Figure 8 The rod 930 and the fixed rod 710 are detachably connected, which can simultaneously drive the filter structure 900 to move when the driving mixing component 700 is being cleaned, making it easy to clean or replace the filter components.

[0067] Reference Figure 9 The specific connection method between the through rod 930 and the fixed rod 710 is as follows: The through rod 930 has an installation groove 932 on its wall. A compression spring 933 and an insert 934 are installed in the installation groove 932. A sleeve 935 is slidably fitted on the through rod 930. When the sleeve 935 covers the installation groove 932, the insert 934 is squeezed into the installation groove 932 and the spring 933 is compressed. The end of the fixed rod 710 has a groove 711 for the through rod 930 to be inserted. The inner wall of the groove 711 has an annular slot 712 that matches the insert 934. When the fixed rod 710 moves toward the filter structure 900, it will push the sleeve 935 to slide, releasing the obstruction of the insert 934. The compression spring 933 returns to its original position and pushes the insert 934 into the slot 712. There is a gap between the through rod 930 and the bottom of the groove 711 to achieve automatic insertion and locking of the through rod 930 and the fixed rod 710. Disassembly is generally carried out outside the fixed pipe 200. The fixed rod 710 has unlocking holes, and the number of unlocking holes corresponds to the number of inserts 934. When the fixed rod 710 is rotated so that the unlocking holes are aligned with the inserts 934, the inserted round rod drives the inserts 934 back into the mounting slots 932. Pulling can separate the fixed rod 710 and the through rod 930.

[0068] Reference Figure 6 and Figure 8 A corrugated pipe 911 is coaxially sleeved on the outer wall of the mounting cylinder 910. One end of the corrugated pipe 911 is fixedly connected to the end of the mounting cylinder 910, and the other end is connected to a slip ring 912. When the slip ring 912 slides onto the mounting cylinder 910, its outer ring wall leaves a gap with the inner wall of the fixed pipe 200 to reduce sliding resistance. Meanwhile, the crest of the corrugated pipe 911 is always in contact with the inner wall of the fixed pipe 200 to form a seal, preventing unfiltered exhaust gas from passing directly through the gap between the mounting cylinder 910 and the fixed pipe 200, and ensuring that all exhaust gas is filtered by the filter screen 920.

[0069] Reference Figure 8Furthermore, the rod 930 is divided into a first rod portion 940 and a second rod portion 950. The first rod portion 940 is located inside the sleeve 935 and is fixedly connected to the filter screen 920. One end of the first rod portion 940 is inserted into the second rod portion 950. The end of the second rod portion 950 near the first rod portion 940 is fixedly connected to the slip ring 912 via a connecting rod 913. The sleeve 935 and the insert block 934 are mounted on the second rod portion 950. A slider 941 is fixedly connected to the first rod portion 940, and the slider 941 can slide inside the second rod portion 950. A limit block 951 is connected to the end of the second rod portion 950 to limit the slider 941 from disengaging from the second rod portion 950. When the fixing rod 710 pulls the second rod portion 950, it first drives the slip ring 912 to move synchronously and stretches the bellows 911, making the maximum outer diameter of the bellows 911 smaller, which facilitates the removal of the entire filter structure 900 from the fixed pipe 200. After the slip ring 912 leaves the mounting cylinder 910, continue pulling the second rod 950 until the slider 941 and the limit block 951 abut, which can pull the entire filter structure 900 out of the fixed pipe 200. The gap between the first sleeve 300 and the exhaust pipe 400 can also allow the entire filter structure 900 to be moved apart.

[0070] Reference Figure 10 In addition, multiple corrugated filter tubes 960 are coaxially sleeved inside the mounting cylinder 910, and multiple sets are distributed at intervals along the axial direction of the mounting cylinder 910. The ends of the filter tubes 960 abut against the filter screen 920, and their tube walls have a hollow structure, thereby increasing the filtration area and improving filtration efficiency and service life.

[0071] The implementation principle of a hydrogen sintering furnace that is easy to clean according to an embodiment of this application is as follows:

[0072] During normal use, the first sleeve 300 is fixedly connected to the fixed pipe 200 and the exhaust pipe 400 via flange 311, forming a sealed tail gas transport passage with the fixed pipe 200, the first sleeve 300, the second sleeve 600 and the exhaust pipe 400. The hydrogen-containing tail gas discharged from the sintering furnace body 100 enters through the fixed pipe 200, passes through the multi-stage filtration of the filter structure 900 to remove metal dust, mixes with the inert gas introduced by the inert gas inlet device, and is then transported to the gas combustion mechanism 500 through the second sleeve 600 and the exhaust pipe 400. After being ignited, it is safely discharged.

[0073] When it is necessary to clean the dust accumulated in the pipeline, remove the bolts between the flange 311 and the fixing ring 230, slide the first sleeve 300 along the direction of the sintering furnace body 100 to separate it from the exhaust pipe 400, and then connect the drive rod 800 to the fixing rod 710. Rotating the drive rod 800 will drive the fixing rod 710 and the spiral blade 720 to move spirally. The spiral blade 720 will perform 360° scraping without dead angles on the inner wall of the fixed pipe 200 and the second sleeve 600. At the same time, the fixing rod 710 will drive the filter structure 900 to move synchronously through the through rod 930. The slip ring 912 is located at the second rod. Pulled by 950, the corrugated pipe 911 stretches away from the fixed pipe 200, making it easier to move the filter structure 900 out of the fixed pipe 200. The dust scraped off by the fixed pipe 200 and the inner sleeve 330 is collected in a dust collection trough 611. When the spiral blade 720 leaves the inner sleeve 330, it also drives the second sleeve 600 to leave the inner sleeve 330. Finally, the filter structure 900 also leaves the fixed pipe 200, allowing the filter screen 920 and filter tube 960 to be cleaned or replaced. During the cleaning process, it is not necessary to disassemble the entire pipeline, which greatly reduces the cleaning difficulty of the sintering furnace exhaust gas transmission section.

[0074] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydrogen sintering furnace that is easy to clean, characterized in that, include: The sintering furnace body (100) has an air outlet at the bottom; A fixed pipe (200) is fixedly installed on the sintering furnace body (100) and connected to the gas outlet. The fixed pipe (200) is connected to an inert gas inlet device. The first sleeve (300) is sleeved on the outside of the fixed pipe (200) and has a sealed sliding contact with the fixed pipe (200); The exhaust pipe (400) includes a horizontal section (410) and a vertical section (420) that are connected to each other, wherein the opening of the horizontal section (410) is sealed to the first sleeve (300); The second sleeve (600) is fitted inside the first sleeve (300). The horizontal section (410) of the exhaust pipe (400) has the same inner diameter as the second sleeve (600). When one end of the second sleeve (600) abuts against the end of the fixed pipe (200), the other end is left with a gap from the exhaust pipe (400). The inner diameter of the second sleeve (600) is the same as that of the fixed pipe (200). The bracket (110) has a vertical section (420) of the exhaust pipe (400) that is detachably mounted on the bracket (110), and a gas combustion mechanism (500) is mounted on the bracket (110). The mixing component (700) is installed inside the second sleeve (600) and includes a fixing rod (710) and a spiral blade (720) fixedly installed on the outer wall of the fixing rod (710). The spiral blade (720) and the inner wall of the second sleeve (600) are sealed together. The drive rod (800) and the fixed rod (710) are detachably connected. When the first sleeve (300) slides away from the exhaust pipe (400), the drive rod (800) is connected to the fixed rod (710). Rotating the drive rod (800) drives the mixing assembly (700) to move along the axial direction of the pipe.

2. The hydrogen sintering furnace according to claim 1, characterized in that, The first sleeve (300) includes: The outer sleeve (310) is slidably installed on the outer wall of the fixed pipe (200); The connecting ring (320) is coaxially arranged with the outer sleeve (310) and forms a sealed fit with the end of the exhaust pipe (400); The inner sleeve (330) is fixedly installed on the inner ring surface of the connecting ring (320). The end of the fixed pipe (200) is provided with an annular groove (220) for accommodating the inner sleeve (330) to slide in. The end of the inner sleeve (330) near the fixed pipe (200) is always located in the annular groove (220). The outer wall of the second sleeve (600) is attached to the inner wall of the inner sleeve (330).

3. The hydrogen sintering furnace according to claim 2, characterized in that, The fixed pipe (200) is externally threaded with a fixing ring (230), and one end of the outer sleeve (310) is connected to a flange (311). The flange (311) and the fixing ring (230) are connected by bolts for sealing.

4. The hydrogen sintering furnace according to claim 2, characterized in that, The second sleeve (600) has a dust collection part (610) on one end face near the exhaust pipe (400). The dust collection part (610) has a dust collection groove (611) with the opening facing upward. The spiral blade (720) can move into the dust collection groove (611).

5. The hydrogen sintering furnace according to claim 1, characterized in that, It also includes a filter structure (900) that can be slidably installed inside the fixed pipe (200); The filter structure (900) includes: The mounting cylinder (910) is coaxially installed with the fixed pipe (200); The filter screen (920) is spaced apart inside the mounting cylinder (910) along the axial direction of the mounting cylinder (910); A through rod (930) passes through the mounting cylinder (910) and the filter screen (920). The through rod (930) is fixedly connected to the mounting cylinder (910) via a connecting rod (931). The through rod (930) and the fixing rod (710) are detachably connected.

6. The hydrogen sintering furnace according to claim 5, characterized in that, The through rod (930) has a mounting groove (932) on its wall. A compression spring (933) and a plug (934) are installed in the mounting groove (932). A sleeve (935) is slidably mounted on the through rod (930). When the sleeve (935) covers the mounting groove (932), the plug (934) compresses the compression spring (933) and is located in the mounting groove (932). The fixing rod (710) has a mounting groove for supplying... The groove (711) into which the through rod (930) is inserted has a slot (712) on its inner wall for inserting the insert block (934). When the fixing rod (710) moves toward the filter structure (900), the fixing rod (710) pushes the sleeve (935) to slide, and the insert block (934) is inserted into the slot (712), so that the through rod (930) and the fixing rod (710) form a connection relationship.

7. A hydrogen sintering furnace for easy cleaning according to claim 6, characterized in that, A corrugated pipe (911) is coaxially sleeved on the outer wall of the mounting cylinder (910). One end of the corrugated pipe (911) is fixedly connected to the end of the mounting cylinder (910). The other end of the corrugated pipe (911) is connected to a slip ring (912). When the slip ring (912) slides on the mounting cylinder (910), the crest of the corrugated pipe (911) and the inner wall of the fixed pipe (200) form a close fit.

8. A hydrogen sintering furnace for easy cleaning according to claim 7, characterized in that, The through rod (930) includes a first rod portion (940) and a second rod portion (950). The first rod portion (940) is located inside the sleeve (935) and fixedly connected to the sleeve (935). One end of the first rod portion (940) is inserted into the second rod portion (950), and the second rod portion (950) and the slip ring (912) are connected. The sleeve (935) and the insert block (934) are installed on the second rod portion (950). A slider is fixedly connected to the first rod portion (940). (941) The slider (941) can slide within the second rod (950). The end of the second rod (950) is connected to a limiting block (951). The limiting block (951) restricts the slider (941) from leaving the second rod (950). When the fixing rod (710) pulls the second rod (950), the second rod (950) pulls the slip ring (912) away from the sleeve (935), and the slider (941) and the limiting block (951) form an abutment.

9. A hydrogen sintering furnace for easy cleaning according to claim 5, characterized in that, Multiple corrugated filter tubes (960) are coaxially sleeved inside the mounting cylinder (910), and multiple sets are distributed along the axial direction of the mounting cylinder (910). The ends of the filter tubes (960) abut against the filter screen (920), and the tube walls of the filter tubes (960) have a hollow structure.

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