Smoke exhaust mechanism for carburizing furnace

Abstract

The utility model discloses a smoke exhaust mechanism for a carburizing furnace, which relates to the technical field of smoke exhaust and comprises an in-furnace gas pipe, and a lower flange is hermetically welded at the top end of the in-furnace gas pipe; an upper flange is fixedly arranged on the upper end surface of the lower flange; an outer cover is hermetically welded on the upper end surface of the upper flange; an exhaust pipe is fixedly mounted at the top end of the outer cover; an exhaust combustion box is fixedly mounted at the top end of the exhaust pipe; a combustion device is arranged in the exhaust combustion box, and the interiors of the exhaust combustion box, the exhaust pipe, the outer cover and the in-furnace gas pipe are all communicated; a supporting plate is fixedly mounted on the inner wall of the in-furnace gas pipe; when flue gas impacts the buffer fan, the buffer fan rotates to drive the scraper fixed on the intercepting cover to rotate, so that carbon particles attached to the inner wall of the outer cover are continuously scraped into the collecting tank, the inner wall of the outer cover is cleaned, and the influence of carbon accumulation on the inner wall of the outer cover on airflow in the outer cover is avoided; and meanwhile, the frequency of frequently disassembling the outer cover is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust, in particular to a smoke exhaust mechanism for a carburizing furnace. Background Art

[0002] The carburizing furnace will produce a lot of waste gas during operation, the main components of which are hydrocarbon gases. These waste gases are harmful to the environment and are flammable, so they need to be properly handled.

[0003] A novel carbon black removal exhaust device for a carburizing furnace disclosed in Chinese patent CN215365949U includes a furnace cover plate, on which an in-furnace exhaust pipe is provided which runs through the interior of the furnace, an upper end of the in-furnace exhaust pipe away from the furnace cover plate is connected with a flange, an end of the flange away from the furnace cover plate is provided with a pillar connected with the in-furnace exhaust pipe, an interception cover is provided on the pillar, an outer shell is provided on the outer side of the interception cover, an exhaust pipe connected with the in-furnace exhaust pipe is provided on the upper end of the outer shell, an exhaust pipe away from the outer shell is provided at the other end of the exhaust pipe away from the outer shell, an ignition electrode and a flame detection electrode are respectively provided on one side of the exhaust combustion chamber.

[0004] However, the above-mentioned exhaust device has the following problems when in use: there is no cleaning structure for the interception cover inside the above-mentioned device; as the device is used, carbon particles in the interception cover will continue to accumulate, thereby affecting the airflow in the outer cover, and the interception cover needs to be disassembled and cleaned regularly, affecting the normal use of the device.

[0005] In order to solve the above problems, the utility model proposes a smoke exhaust mechanism for a carburizing furnace. Utility Model Content

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smoke exhaust mechanism for a carburizing furnace, comprising an air pipe in the furnace, the top end of which is sealed and welded with a lower flange; the upper end face of the lower flange is fixedly provided with an upper flange; the upper end face of the upper flange is sealed and welded with an outer cover; the top end of the outer cover is fixedly installed with an exhaust pipe; the top end of the exhaust pipe is fixedly installed with an exhaust combustion box; and a combustion device is provided inside the exhaust combustion box.

[0007] The exhaust combustion box, exhaust pipe, outer cover and the interior of the gas pipe in the furnace are all connected; a support plate is fixedly installed on the inner wall of the gas pipe in the furnace; a connecting rod is rotatably installed on the support plate; the connecting rod is coaxially arranged with the gas pipe in the furnace, and a buffer fan is fixedly installed at the bottom end of the connecting rod; the top end of the connecting rod extends to the inside of the outer cover. An interception cover is rotatably installed at the top end of the inner part of the outer cover; the bottom end of the interception cover is plugged and matched with the top end of the connecting rod; a scraper is fixedly installed on the outside of the interception cover; the scraper is fitted with the inner wall of the outer cover; a mounting groove is opened on the lower flange; a collection groove is arranged inside the mounting groove.

[0008] Preferably, the lower flange is fixedly connected to the collecting tank by screws.

[0009] Preferably, the combustion device includes a blocking plate; the blocking plate is fixedly mounted on the inner wall of the exhaust combustion box; a spherical surface is provided at the center of the upper surface of the blocking plate; a through hole is provided at the center of the spherical surface; a hollow steel ball is provided inside the spherical surface; the hollow steel ball is tightly fitted with the inner wall of the spherical surface; a counterweight rod is fixedly connected to the bottom end of the hollow steel ball; and the counterweight rod is slidably connected to the through hole.

[0010] A plurality of air holes are evenly arranged on the inner wall of the exhaust combustion box.

[0011] Preferably, a support frame is fixedly mounted on the outer wall of the exhaust pipe; an ignition assembly and a flame detection assembly are fixedly mounted on one end of the support frame away from the exhaust pipe; through holes are provided on the upper end surface of the exhaust combustion box at positions corresponding to the ignition assembly and the flame detection assembly; the ignition assembly and the flame detection assembly both extend to the interior of the exhaust combustion box through the through holes.

[0012] Preferably, the mounting groove is provided at the top of the inner wall of the lower flange; a placement ring is integrally formed on the outer side of the collecting groove; the placement ring is adapted to the mounting groove; and the collecting groove is movably mounted inside the mounting groove via the placement ring.

[0013] Preferably, a connecting tube is fixedly welded to the bottom end of the intercepting cover; a spline groove is opened on the inner wall of the connecting tube; a spline is fixedly welded on the outer side of the top end of the connecting rod at a position corresponding to the spline groove; and the axial diameter of the connecting rod is smaller than the inner diameter of the connecting tube.

[0014] Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The smoke exhaust mechanism for the carburizing furnace, when the smoke hits the buffer fan, causes the buffer fan to rotate, thereby driving the scraper fixed on the interception cover to rotate, thereby continuously scraping the carbon particles attached to the inner wall of the outer cover into the collection tank, thereby cleaning the inner wall of the outer cover, avoiding the accumulation of carbon on the inner wall of the outer cover to affect the airflow in the outer cover, and at the same time reducing the frequency of frequent disassembly of the outer cover, thereby extending the service life of the device.

[0017] (2) In the smoke exhaust mechanism for the carburizing furnace, the smoke in the furnace first impacts the buffer fan during the rising process, and then impacts the inclined surface of the interception cover when entering the outer cover, thereby slowing down the rising speed of the smoke, increasing the residence time of the smoke in the outer cover, and increasing the carbon adhesion rate of the smoke in the outer cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of the internal structure of the utility model;

[0021] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the combustion chamber of the utility model;

[0023] Figure 5 For this utility model Figure 3 A magnified schematic diagram of the middle part;

[0024] Figure 6 This is a schematic diagram of the structure of the interception cover of the utility model;

[0025] Figure 7 This is a schematic diagram of the connecting rod structure of the utility model;

[0026] Figure 8 This is a schematic diagram of the connecting rod connection structure of the utility model.

[0027] Figure numerals: 1. exhaust combustion box; 2. exhaust pipe; 3. outer cover; 4. upper flange; 5. gas pipe in the furnace; 6. support frame; 7. ignition assembly; 8. flame detection assembly; 9. blocking plate; 10. hollow steel ball; 11. interception cover; 12. support plate; 13. buffer fan; 14. collecting tank; 15. screw; 16. connecting rod; 17. scraper; 18. lower flange. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0029] See also Figure 1-8 The utility model provides a technical solution: a smoke exhaust mechanism for a carburizing furnace, comprising an air pipe 5 in the furnace, the top of which is sealed and welded with a lower flange 18. An upper flange 4 is fixedly arranged on the upper end surface of the lower flange 18. The lower flange 18 is fixedly connected to a collecting tank 14 by screws 15.

[0030] The upper end surface of the upper flange 4 is sealed and welded with an outer cover 3. An exhaust pipe 2 is fixedly installed at the top of the outer cover 3. An exhaust combustion box 1 is fixedly installed at the top of the exhaust pipe 2. A combustion device is arranged inside the exhaust combustion box 1.

[0031] Specifically, the combustion device includes a plugging plate 9. The plugging plate 9 is fixedly mounted on the inner wall of the exhaust combustion box 1. A spherical surface is provided at the center of the upper surface of the plugging plate 9. A through hole is provided at the center of the spherical surface; a hollow steel ball 10 is provided inside the spherical surface. The hollow steel ball 10 is closely fitted with the inner wall of the spherical surface. A counterweight rod is fixedly connected to the bottom end of the hollow steel ball 10; the counterweight rod is slidably connected to the through hole.

[0032] A plurality of air holes are evenly arranged on the inner wall of the exhaust combustion box 1 .

[0033] Furthermore, a support frame 6 is fixedly mounted on the outer wall of the exhaust pipe 2. An ignition assembly 7 and a flame detection assembly 8 are fixedly mounted on one end of the support frame 6 away from the exhaust pipe 2. Through holes are provided on the upper end surface of the exhaust combustion box 1 at positions corresponding to the ignition assembly 7 and the flame detection assembly 8. The ignition assembly 7 and the flame detection assembly 8 both extend to the interior of the exhaust combustion box 1 through the through holes.

[0034] The exhaust combustion box 1, the exhaust pipe 2, the outer cover 3 and the interior of the gas pipe 5 in the furnace are all connected. A support plate 12 is fixedly installed on the inner wall of the gas pipe 5 in the furnace. A connecting rod 16 is rotatably installed on the support plate 12. The connecting rod 16 is coaxially arranged with the gas pipe 5 in the furnace, and a buffer fan 13 is fixedly installed at the bottom end of the connecting rod 16. The top end of the connecting rod 16 extends to the inside of the outer cover 3. An interception cover 11 is rotatably installed at the top end of the inner part of the outer cover 3.

[0035] The bottom end of the interception cover 11 is plug-fitted with the top end of the connecting rod 16 .

[0036] Specifically, a connecting tube is fixedly welded to the bottom end of the interception cover 11. A spline groove is provided on the inner wall of the connecting tube. A spline is fixedly welded to the outer side of the top end of the connecting rod 16 at a position corresponding to the spline groove. The shaft diameter of the connecting rod 16 is smaller than the inner diameter of the connecting tube, so that the smoke is discharged upward from the gap between the connecting rod 16 and the inner wall of the connecting tube into the interior of the exhaust pipe 2.

[0037] The outside of the interception cover 11 is fixedly provided with a scraper 17. The scraper 17 is fitted with the inner wall of the outer cover 3.

[0038] A mounting groove is provided on the lower flange 18. A collecting groove 14 is provided inside the mounting groove.

[0039] Specifically, the mounting groove is provided at the top of the inner wall of the lower flange 18. A placement ring is integrally formed on the outer side of the collecting groove 14. The placement ring is adapted to the mounting groove. The collecting groove 14 is movably mounted inside the mounting groove through the placement ring, and after the upper flange 4 and the lower flange 18 are fixedly connected by screws, the collecting groove 14 is limited inside the mounting groove.

[0040] Working principle:

[0041] When in use, the flue gas enters the furnace air pipe 5 through the bottom end of the furnace air pipe 5, and the rising flue gas passes through the upper flange 4 and the lower flange 18 and enters the outer cover 3, and then impacts the inclined surface of the interception cover 11, so that the flue gas stays briefly in the outer cover 3 so that the carbon black in the flue gas adheres to the inner wall of the outer cover 3. The flue gas after the carbon adhesion treatment enters the interception cover 11 through the connecting tube at the bottom end of the interception cover 11, and finally passes through the exhaust pipe 2 to the exhaust combustion box 1.

[0042] A blocking plate 9 is fixed to the inner wall of the exhaust combustion box 1, and a hollow steel ball 10 with a counterweight rod welded to the bottom cooperates with the spherical surface processed on the blocking plate 9. The corresponding counterweight rod is selected according to the furnace pressure. When the furnace pressure is high, the hollow steel ball 10 floats, and the flue gas is passed into the combustion chamber of the exhaust combustion box 1. The flue gas is ignited through the ignition component 7, and the flame in the exhaust combustion box 1 is monitored by the flame detection component 8 to see if it is extinguished. If the fire is extinguished, the ignition component 7 can be triggered to ignite again.

[0043] When the flue gas in the furnace enters the furnace air pipe 5, the rising smoke will first impact the buffer fan 13 when passing through the furnace air pipe 5, which has the effect of slowing down the rising of the flue gas just out of the furnace. The rising smoke causes the buffer fan 13 to rotate, and the buffer fan 13 drives the connecting rod 16 to rotate, and then drives the interception cover 11 to rotate. The rotation of the connecting cover drives the scraper 17 to continuously scrape the inner wall of the outer cover 3, and the carbon black particles attached to the inner wall of the outer cover 3 are scraped into the collecting tank 14, and then the inner wall of the outer cover 3 is cleaned to avoid the accumulation of carbon on the inner wall of the outer cover affecting the airflow in the outer cover.

[0044] The upper flange 4 is separated by removing the screws 15, and the upper flange 4 is pulled to separate the interception cover 11 from the connecting rod 16, and the collecting tank 14 placed in the installation groove of the lower flange 18 is taken out for cleaning.

[0045] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A smoke exhaust mechanism for a carburizing furnace, comprising an air pipe (5) in a furnace, a lower flange (18) being welded to the top end of the air pipe (5) in the furnace; an upper flange (4) being fixedly arranged on the upper end surface of the lower flange (18); an outer cover (3) being welded to the upper end surface of the upper flange (4); an exhaust pipe (2) being fixedly mounted on the top end of the outer cover (3); and an exhaust combustion box (1) being fixedly mounted on the top end of the exhaust pipe (2); wherein: A combustion device is provided inside the exhaust combustion box (1); The exhaust combustion box (1), the exhaust pipe (2), the outer cover (3) and the interior of the gas pipe (5) in the furnace are all connected; a support plate (12) is fixedly mounted on the inner wall of the gas pipe (5) in the furnace; a connecting rod (16) is rotatably mounted on the support plate (12); the connecting rod (16) is coaxially arranged with the gas pipe (5) in the furnace, and a buffer fan (13) is fixedly mounted on the bottom end of the connecting rod (16); the top end of the connecting rod (16) extends to the inside of the outer cover (3); an intercepting cover (11) is rotatably mounted on the top end of the inner part of the outer cover (3); the bottom end of the intercepting cover (11) is plugged and matched with the top end of the connecting rod (16); a scraper (17) is fixedly mounted on the outer side of the intercepting cover (11); the scraper (17) is in contact with the inner wall of the outer cover (3); a mounting groove is provided on the lower flange (18); and a collecting groove (14) is arranged inside the mounting groove.

2. The smoke exhaust mechanism for a carburizing furnace according to claim 1, characterized in that: The lower flange (18) is fixedly connected to the collecting tank (14) via screws (15).

3. The smoke exhaust mechanism for a carburizing furnace according to claim 1, characterized in that: The combustion device comprises a blocking plate (9); the blocking plate (9) is fixedly mounted on the inner wall of the exhaust combustion box (1); a spherical surface is provided at the center of the upper surface of the blocking plate (9); a through hole is provided at the center of the spherical surface; a hollow steel ball (10) is provided inside the spherical surface; the hollow steel ball (10) is closely fitted with the inner wall of the spherical surface; a counterweight rod is fixedly connected to the bottom end of the hollow steel ball (10); the counterweight rod is slidably connected to the through hole; A plurality of air holes are evenly arranged on the inner wall of the exhaust combustion box (1).

4. The smoke exhaust mechanism for a carburizing furnace according to claim 1, characterized in that: A support frame (6) is fixedly mounted on the outer wall of the exhaust pipe (2); an ignition assembly (7) and a flame detection assembly (8) are fixedly mounted on one end of the support frame (6) away from the exhaust pipe (2); through holes are provided on the upper end surface of the exhaust combustion box (1) at positions corresponding to the ignition assembly (7) and the flame detection assembly (8); and the ignition assembly (7) and the flame detection assembly (8) extend into the interior of the exhaust combustion box (1) through the through holes.

5. The smoke exhaust mechanism for a carburizing furnace according to claim 1, characterized in that: The installation groove is provided at the top end of the inner wall of the lower flange (18); a placement ring is integrally formed on the outer side of the collecting groove (14); the placement ring is adapted to the installation groove; and the collecting groove (14) is movably installed inside the installation groove via the placement ring.

6. The smoke exhaust mechanism for a carburizing furnace according to claim 1, characterized in that: A connecting tube is fixedly welded to the bottom end of the intercepting cover (11); a spline groove is provided on the inner wall of the connecting tube; a spline is fixedly welded to the outer side of the top end of the connecting rod (16) at a position corresponding to the spline groove; and the shaft diameter of the connecting rod (16) is smaller than the inner diameter of the connecting tube.

Images