Equipment for circulating and purifying gas in annealing furnace

Abstract

The utility model discloses equipment for circulating and purifying gas in an annealing furnace, and relates to the field of metal processing equipment. The utility model relates to circulating and purifying equipment for gas in an annealing furnace, which comprises an annealing furnace body and further comprises a purifying cylinder, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe, the filter plate is matched with the annular collecting box, large particles and part of fine dust in protective gas can be effectively intercepted, the dust can be more efficiently collected under the rotary centrifugal action, compared with a traditional filter screen for filtering, the dust intercepting capacity is higher, blockage is not prone to occurring, the trouble of frequently replacing the filter screen is reduced, and the service life of the filter screen is prolonged. The glass rod rubs with the ceramic fiber cushion to generate static electricity, so that tiny dust can be adsorbed, the defect that the filtering effect of pure physical filtering on tiny particles is poor is overcome, the gas purification quality is further improved, the risk of product flaws caused by deposition of dust on the metal surface is reduced, and blockage of dust to parts such as pipelines, valves and heat exchangers in the furnace is reduced; and efficient and stable operation of equipment is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal processing equipment, specifically, it relates to a gas circulation and purification device inside an annealing furnace. Background Technology

[0002] In modern industrial production, annealing is an important means of improving the properties of metallic materials. As a key piece of equipment for implementing the annealing process, the purity of the gas inside the annealing furnace plays a decisive role in the annealing quality.

[0003] During the operation of an annealing furnace, dust and impurities in the furnace gas come from a wide range of sources. On the one hand, the surface of the annealed metal material may carry tiny particles that fall off and mix into the gas under high temperature conditions. On the other hand, as the refractory material inside the furnace increases in usage time, some debris will fall off and enter the gas. If these dust and impurities are not removed in time, they will have many negative effects. They may deposit on the metal surface, affecting the surface quality of the metal and causing product defects. They may also block key components such as pipes, valves, and heat exchangers inside the furnace, reducing the operating efficiency of the equipment and even causing equipment failure.

[0004] Currently, the traditional gas purification method in annealing furnaces is usually a simple filter screen, which is not very effective at intercepting fine dust. Moreover, the filter screen is prone to clogging and needs to be replaced frequently, which not only increases maintenance costs but also causes equipment downtime due to filter screen replacement, affecting production efficiency. Although cyclone dust collectors can handle larger dust particles, their ability to remove fine dust is limited. Therefore, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an annealing furnace gas circulation and purification device that can overcome or at least partially solve the above problems.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: an annealing furnace gas circulation purification device, including an annealing furnace body, and further including: a purification cylinder, which is installed on the side wall of the annealing furnace body by a support frame; a cylinder cover, which is threadedly connected to the cylinder opening of the purification cylinder; an air suction pipe, whose two ends are respectively connected to the air extraction port of the annealing furnace body and the opening on the cylinder cover, and the air suction pipe is connected to the opening on the cylinder cover by a rotary joint; an air pump, which is fixedly installed on the side wall of the annealing furnace body and located below the purification cylinder, and the air extraction end of the air pump is connected to... The outlets of the purification cylinders are connected by a suction pipe, and the outlet of the air pump is connected to the return end of the annealing furnace body by a return pipe; a filter plate is rotatably connected inside the purification cylinder, and an annular collection box is fixedly connected around the outer edge of the filter plate, the annular collection box slidingly against the wall of the purification cylinder; a drive mechanism for driving the filter plate to rotate is installed on the purification cylinder; a ceramic fiber pad is embedded in the inner wall of the purification cylinder; a glass rod is circumferentially and equidistantly installed on the upper end of the filter plate via a connecting rod, and slides against the ceramic fiber pad.

[0007] Furthermore, the driving mechanism includes a motor, a driving rod, and a connecting seat. The motor is fixedly connected to the bottom of the purification cylinder, and the output end of the motor extends into the purification cylinder and is fixedly connected to the driving rod. The connecting seat is fixedly connected to the bottom of the annular collection box and is connected to the driving rod.

[0008] To facilitate quick separation and assembly of the annular collection box and the drive rod, the drive rod is further designed to be square, and the bottom of the connecting seat has a square slot for use with the drive rod.

[0009] To further improve the filtration effect on impurities, the filter plate is designed in a conical shape.

[0010] To facilitate quick assembly and disassembly of the glass rod and the ceramic fiber pad, the glass rod and the connecting rod are detachably connected by threads, and the ceramic fiber pad is detachably connected to the purification cylinder by Velcro.

[0011] To facilitate the scraping of impurities adsorbed on the ceramic fiber pad when the annular collection box moves upward, the opening of the annular collection box is further inclined on the side near the wall of the purification cylinder.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention, through the combination of filter plate and annular collection box, can effectively intercept and protect larger particles and some fine dust in the gas. The rotational centrifugal action can make the dust be collected more efficiently. Compared with traditional filter screen filtration, it has a stronger dust interception ability and is not easy to clog, reducing the trouble of frequently replacing the filter screen.

[0013] The friction between the glass rod and the ceramic fiber pad generates static electricity, which can adsorb fine dust particles. This compensates for the poor filtration effect of simple physical filtration on fine particles, further improves the quality of gas purification, reduces the risk of dust deposition on metal surfaces leading to product defects, and reduces dust blockage of components such as furnace pipes, valves, and heat exchangers, ensuring efficient and stable operation of the equipment.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This utility model Figure 2 A schematic diagram of the structure of part A;

[0019] Figure 4 This is an exploded view of part of the structure of this utility model.

[0020] In the diagram: 1. Annealing furnace body; 101. Support frame; 2. Purification cylinder; 201. Cylinder cover; 202. Suction pipe; 203. Extraction pipe; 204. Air pump; 205. Return pipe; 206. Ceramic fiber pad; 3. Motor; 301. Drive rod; 302. Filter plate; 303. Annular collection box; 304. Connecting seat; 305. Connecting rod; 306. Glass rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] Example 1:

[0023] Reference Figures 1-4An annealing furnace gas circulation purification device includes an annealing furnace body 1, and further includes: a purification cylinder 2, mounted on the side wall of the annealing furnace body 1 via a support frame 101; a cylinder cover 201, threadedly connected to the cylinder opening of the purification cylinder 2; a suction pipe 202, with its two ends connected to the suction port of the annealing furnace body 1 and the opening on the cylinder cover 201 respectively, and the suction pipe 202 and the opening of the cylinder cover 201 are connected by a rotary joint; and an air pump 204, fixedly mounted on the side wall of the annealing furnace body 1 and located below the purification cylinder 2, with the suction end of the air pump 204 connected to the outlet end of the purification cylinder 2 via a suction pipe 203. The air pump 204 is connected to the air return end of the annealing furnace body 1 via the air return pipe 205; the filter plate 302 is rotatably connected inside the purification cylinder 2, and an annular collection box 303 is fixedly connected around the outer edge of the filter plate 302, and the annular collection box 303 slides against the cylinder wall of the purification cylinder 2; the drive mechanism for driving the filter plate 302 to rotate is installed on the purification cylinder 2; the ceramic fiber pad 206 is embedded in the inner wall of the purification cylinder 2; the glass rod 306 is circumferentially and equidistantly installed on the upper end of the filter plate 302 via the connecting rod 305, and slides against the ceramic fiber pad 206.

[0024] The driving mechanism includes a motor 3, a drive rod 301, and a connecting seat 304. The motor 3 is fixedly connected to the bottom of the purification cylinder 2. The output end of the motor 3 extends into the purification cylinder 2 and is fixedly connected to the drive rod 301. The connecting seat 304 is fixedly connected to the bottom of the annular collection box 303 and is connected to the drive rod 301.

[0025] When using the annealing furnace body 1 to anneal metal materials, first place the annealing furnace body 1 in a suitable position to ensure its stability. Then, use the support frame 101 to securely install the purification cylinder 2 on the side wall of the annealing furnace body 1. During installation, pay attention to the sealing of each connection between the purification cylinder 2 and the annealing furnace body 1 to prevent gas leakage.

[0026] Install the filter plate 302 inside the purification cylinder 2 to ensure smooth rotation and connection. Fix the annular collection box 303 around the outside of the filter plate 302 to ensure sliding contact with the cylinder wall of the purification cylinder 2. Accurately embed the ceramic fiber pad 206 into the inner wall of the purification cylinder 2. Use the connecting rod 305 to install the glass rod 306 at equal intervals around the filter plate 302 to ensure that it slides in contact with the ceramic fiber pad 206.

[0027] Then, the cylinder cap 201 is tightly connected to the opening of the purification cylinder 2 via threads. The two ends of the suction pipe 202 are precisely connected to the exhaust port of the annealing furnace body 1 and the opening of the cylinder cap 201 via rotary joints to ensure smooth gas transmission and flexible rotation.

[0028] An air pump 204 is fixedly installed on the lower side of the purification cylinder 2 on the side wall of the annealing furnace body 1. The air pump 204 is connected to the air outlet of the purification cylinder 2 by the air extraction pipe 203, and the air return pipe 205 is connected to the air return of the air pump 204 to the air return of the annealing furnace body 1. All connection parts must be well sealed.

[0029] Motor 3 is fixedly installed at the bottom of purification cylinder 2. The output end of motor 3 is extended into purification cylinder 2 and firmly connected to drive rod 301. Connecting seat 304 is fixed at the bottom of annular collection box 303 and properly connected to drive rod 301. After installation, the electrical performance of motor 3, air pump 204 and other electrical equipment is checked and adjusted to ensure that they can operate normally.

[0030] When the annealing furnace starts operating and the protective gas inside the furnace needs to be purified, the gas pump 204 is started. The operation of the gas pump 204 generates negative pressure, which causes the protective gas in the annealing furnace body 1 to flow into the purification cylinder 2 through the suction pipe 202. Since the suction pipe 202 is connected to the cylinder cover 201 through a rotary joint, the angle can be flexibly adjusted during gas flow and equipment operation to avoid pipeline twisting affecting gas transmission.

[0031] After the protective gas enters the purification cylinder 2, the motor 3 starts. The output end of the motor 3 drives the drive rod 301 to rotate. The drive rod 301 drives the annular collection box 303 and the filter plate 302 to rotate through the connecting seat 304. During the rotation of the filter plate 302, on the one hand, it uses its own structure to intercept and filter out larger particles and some fine dust in the protective gas. On the other hand, under the action of rotation and centrifugation, the intercepted dust is thrown into the annular collection box 303 for collection.

[0032] Simultaneously, as the filter plate 302 rotates, it drives the glass rod 306 to rotate via the connecting rod 305. The glass rod 306 slides and rubs against the ceramic fiber pad 206. Because the ceramic fiber pad 206 is heat-resistant and has good insulation properties, the friction with the glass rod 306 can effectively generate static electricity. The generated static electricity can adsorb tiny dust particles in the protective gas that are difficult to be intercepted by the filter plate 302, further improving the gas purification effect.

[0033] After being filtered by filter plate 302 and treated by electrostatic adsorption, the gas enters the gas pump 204 from the gas outlet of purification cylinder 2 through the gas extraction pipe 203, and is then sent back to the annealing furnace body 1 by the gas pump 204 through the return gas pipe 205, completing the gas circulation purification process.

[0034] The filter plate 302, in conjunction with the annular collection box 303, can effectively intercept and protect larger particles and some fine dust in the gas. The centrifugal rotation allows the dust to be collected more efficiently. Compared with traditional filter screen filtration, it has a stronger dust interception capability and is less prone to clogging, reducing the hassle of frequent filter screen replacement.

[0035] The friction between the glass rod 306 and the ceramic fiber pad 206 generates static electricity, which can adsorb fine dust. This compensates for the poor filtration effect of simple physical filtration on fine particles, further improves the quality of gas purification, reduces the risk of dust deposition on metal surfaces leading to product defects, reduces dust blockage of components such as furnace pipes, valves and heat exchangers, and ensures efficient and stable operation of the equipment.

[0036] Example 2:

[0037] Reference Figures 1-4 An annealing furnace gas circulation purification device is basically the same as that in Example 1, but with a further improvement: the drive rod 301 is a square rod, and the bottom of the connecting seat 304 is provided with a square slot for cooperating with the drive rod 301. When the equipment is maintained or the parts are replaced, the operator does not need to use complicated tools or master difficult operating skills. He can simply pull out or insert the drive rod 301 directly from the square slot to quickly complete the separation and assembly of the connecting seat 304 and the drive rod 301, which greatly saves maintenance time and improves work efficiency.

[0038] The filter plate 302 has a conical design. The conical shape of the filter plate 302 can guide the gas from the larger bottom end to the smaller top end, so that the gas forms a more reasonable flow path in the purification cylinder 2. Compared with the flat filter plate, it can reduce the turbulence of the gas in the cylinder, allowing the gas to pass through the filter plate 302 more orderly and improving the filtration efficiency. When the gas enters from the bottom, it will gradually converge due to the guidance of the conical surface, increasing the contact area and time with the filter plate 302, making it easier for dust to be intercepted. Furthermore, when the filter plate 302 rotates rapidly, the intercepted impurities can be thrown away under the action of centrifugal force.

[0039] Example 3:

[0040] Reference Figures 1-4An annealing furnace gas circulation purification device is basically the same as that in Example 2, but with the following additional features: the glass rod 306 and the connecting rod 305 are detachably connected by threads, and the ceramic fiber pad 206 is detachably connected to the purification cylinder 2 by Velcro. When the glass rod 306 wears or breaks during long-term friction with the ceramic fiber pad 206, the operator only needs to use a simple tool to quickly replace it by rotating and unscrewing the threaded glass rod 306. The elimination of the need for large-scale disassembly of the entire device significantly shortens maintenance time and reduces the impact of equipment downtime on production schedules. For example, in continuous production annealing processes, if the performance of a glass rod 306 is found to be degraded, it can be quickly replaced, ensuring the continuous and stable operation of the electrostatic adsorption of fine dust. The ceramic fiber pad 206, due to long-term operation in high-temperature environments and frequent friction with the glass rod 306, may experience aging, wear, or excessive dust adsorption, affecting the electrostatic generation effect. Through the detachable connection of Velcro, it can be easily removed from the purification cylinder 2 for cleaning, replacement of the pad, and other operations. This avoids the complex procedures required for replacing the ceramic fiber pad 206 under traditional fixing methods, which may even damage the inner wall of the purification cylinder 2, thus reducing maintenance costs and difficulty.

[0041] The opening of the annular collection box 303 is inclined on the side near the wall of the purification cylinder 2. When the annular collection box 303 needs to be moved upward, the inclined opening design can cleverly scrape off the impurities attached to the ceramic fiber pad 206. During the operation of the equipment, the ceramic fiber pad 206 generates static electricity due to friction with the glass rod 306, which adsorbs a large amount of tiny dust impurities. If these impurities accumulate for a long time, they will not only affect the static electricity generation effect of the ceramic fiber pad 206, but may also undergo physical or chemical changes in a high-temperature environment, thereby affecting the overall performance of the equipment. The inclined opening of the annular collection box 303 acts as an efficient cleaning tool during the upward movement. It slides along the surface of the ceramic fiber pad 206 and can accurately scrape off the impurities attached to the pad without additional manual cleaning steps, which greatly saves maintenance time and labor costs.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A gas circulation and purification device for an annealing furnace, characterized in that, Including the annealing furnace body (1), it also includes: The purification cylinder (2) is mounted on the side wall of the annealing furnace body (1) via a support frame (101); A cap (201) is threadedly connected to the opening of the purification cylinder (2); The suction pipe (202) is connected at both ends to the air extraction port of the annealing furnace body (1) and the opening on the cylinder cover (201), respectively. The suction pipe (202) and the opening on the cylinder cover (201) are connected by a rotary joint. An air pump (204) is fixedly installed on the side wall of the annealing furnace body (1) and located below the purification cylinder (2). The air pump (204) is connected to the air outlet of the purification cylinder (2) through an air pump pipe (203), and the air outlet of the air pump (204) is connected to the air return end of the annealing furnace body (1) through a air return pipe (205). A filter plate (302) is rotatably connected inside the purification cylinder (2). An annular collection box (303) is fixedly connected around the outer side of the filter plate (302). The annular collection box (303) slides against the wall of the purification cylinder (2). A drive mechanism for driving the filter plate (302) to rotate is mounted on the purification cylinder (2); A ceramic fiber pad (206) is embedded in the inner wall of the purification cylinder (2); A glass rod (306) is installed circumferentially at the upper end of the filter plate (302) via a connecting rod (305) and slides against the ceramic fiber pad (206).

2. The gas circulation and purification equipment inside an annealing furnace according to claim 1, characterized in that, The driving mechanism includes a motor (3), a drive rod (301), and a connecting seat (304). The motor (3) is fixedly connected to the bottom of the purification cylinder (2). The output end of the motor (3) extends into the purification cylinder (2) and is fixedly connected to the drive rod (301). The connecting seat (304) is fixedly connected to the bottom of the annular collection box (303) and is connected to the drive rod (301).

3. The gas circulation and purification equipment inside an annealing furnace according to claim 2, characterized in that, The drive rod (301) is a square rod, and the bottom of the connecting seat (304) is provided with a square slot for cooperating with the drive rod (301).

4. The gas circulation and purification equipment inside an annealing furnace according to claim 1, characterized in that, The filter plate (302) has a conical design.

5. The gas circulation and purification device inside an annealing furnace according to claim 1, characterized in that, The glass rod (306) and the connecting rod (305) are detachably connected by threads, and the ceramic fiber pad (206) is detachably connected to the purification cylinder (2) by Velcro.

6. The gas circulation and purification device inside an annealing furnace according to claim 1, characterized in that, The opening of the annular collection box (303) is inclined on the side of the purification cylinder (2) near the cylinder wall.

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