Cooling structure of roller kiln
By designing a roller kiln cooling structure including a shell, exhaust main pipe line, air supply assembly and fin tube, the problem that the kiln with a short cooling section in the prior art cannot achieve the target cooling effect, and achieve a more efficient cooling effect and a safer working environment.
Patent Information
- Application Number
- CN202421850826.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing air-cooled structure of the roller kiln cooling section cannot achieve the target cooling effect in the kiln with short cooling sections, resulting in the furnace temperature of the sintered material being higher than the target furnace temperature, affecting working efficiency and at the risk of scalding.
A roller kiln cooling structure including a shell, an exhaust main pipe line, an air supply assembly, a first branch pipe, a second branch pipe and a fin tube is designed to increase the heat exchange area through the fin tube and enhance the cooling effect through the air supply assembly.
The target cooling effect can be achieved in a kiln with a short cooling section, ensuring that the material outlet temperature meets production requirements, ensuring the safety of staff, and improving production efficiency.
Smart Images
Figure CN222887503U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of roller kiln cooling, and specifically relates to a roller kiln cooling structure. Background Technology
[0002] After the sintering process, the temperature of the roller kiln is high, which leads to a long cooling time when discharging. In order to speed up the cooling of the roller kiln, a cooling device of the air cooling section is installed in the roller kiln.
[0003] The existing roller kiln cooling section air cooling structure is a jacket air cooling structure, which allows room temperature gas to enter through the bottom of the kiln, and heat is removed through the kiln jacket and heat exchange with the inside of the kiln. However, this structure cannot achieve the target cooling effect in a kiln with a short cooling section, resulting in the sintered material discharge temperature being higher than the target discharge temperature. The material discharge temperature is too high to be transferred, and the workshop temperature will rise, making it impossible for staff to work normally in the workshop, affecting work efficiency, and there is also a risk of scalding staff.
[0004] Therefore, in view of the above technical problems, it is necessary to provide a roller kiln cooling structure.
[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Contents of utility model
[0006] The purpose of the utility model is to provide a roller kiln cooling structure, which can solve the above problems.
[0007] In order to achieve the above purpose, a specific embodiment of the utility model provides a roller kiln cooling structure, including a shell, an exhaust main line is installed on the shell, an air supply assembly is also installed on the shell, a first branch pipe is installed on the exhaust main line, a second branch pipe is installed on the first branch pipe, and a fin tube is fixedly connected to one end of the second branch pipe away from the first branch pipe, and the fin tube runs through the shell.
[0008] In one or more embodiments of the present utility model, a flap valve is installed between the first branch pipe and the second branch pipe.
[0009] In one or more embodiments of the utility model, the air supply assembly includes a fan, the fan is plugged with an air intake main line, and the end of the air intake main line away from the fan is fixedly connected to a third branch pipe.
[0010] In one or more embodiments of the utility model, the height of the air intake main pipe from the bottom wall of the shell is 4-6 cm.
[0011] In one or more embodiments of the present utility model, an air outlet is provided on the third branch pipe, and the opening of the air outlet is perpendicular to the finned tube.
[0012] In one or more embodiments of the present utility model, a dust-proof component is installed at one end of the finned tube.
[0013] In one or more embodiments of the present utility model, a dust-proof tube is provided on the dust-proof component, a metal filter screen is installed at one end of the dust-proof tube away from the finned tube, and a rotating bearing is fixedly connected to the metal filter screen.
[0014] In one or more embodiments of the present utility model, a rotating shaft is rotatably connected to the rotating bearing, a fan blade is fixedly connected to one end of the rotating shaft away from the rotating bearing, a scraping strip is also fixedly connected to the rotating shaft, and one end of the scraping strip is in contact with the surface of the rotating bearing.
[0015] In one or more embodiments of the present utility model, a dust-blocking ring is fixedly connected inside the dust-proof tube, and a dust leakage port is provided on the dust-proof tube.
[0016] In one or more embodiments of the present utility model, a collection box is adhesively connected to the outer wall of the dust-proof tube, and the collection box is matched with the dust leakage port.
[0017] Compared with the prior art, a cooling structure of a roller hearth kiln of the present utility model can achieve the target cooling effect in a kiln with a shorter cooling section, so that the temperature of the material when leaving the furnace meets the production requirements, which can not only ensure the safety of the staff, but also improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 It is a schematic structural diagram of a cooling structure of a roller hearth kiln in an embodiment of the present utility model;
[0020] Figure 2 It is a partial cross-sectional view of a cooling structure of a roller hearth kiln in an embodiment of the present utility model;
[0021] Figure 3 It is a schematic structural diagram of a dust-proof component of a cooling structure of a roller hearth kiln in an embodiment of the present utility model;
[0022] Figure 4Explosion diagram of the dust-proof component of a roller hearth kiln cooling structure in an embodiment of the present utility model;
[0023] Figure 5 Explosion diagram of the dust-proof component of a roller hearth kiln cooling structure in a left-view state in an embodiment of the present utility model;
[0024] Figure 6 Partial cross-sectional view of the dust-proof component of a roller hearth kiln cooling structure in an embodiment of the present utility model.
[0025] Explanation of main reference numerals:
[0026] 1. Housing; 2. Exhaust main pipeline; 21. First branch pipe; 22. Flap valve; 23. Second branch pipe; 231. Finned tube; 3. Fan; 31. Intake main pipeline; 32. Third branch pipe; 321. Air outlet; 4. Dust-proof component; 41. Dust-proof pipe; 411. Dust-blocking ring; 412. Dust leakage port; 42. Metal filter screen; 43. Rotating bearing; 44. Rotating shaft; 441. Fan blade; 442. Scraping strip; 45. Collection box. Detailed implementation manners
[0027] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0028] As Figure 1 shown, a roller hearth kiln cooling structure in an embodiment of the present utility model includes an exhaust main pipeline 2, and the exhaust main pipeline 2 is installed on the housing 1. After the housing 1 sinters materials, the temperature of the sintered materials and the housing 1 is relatively high. It is necessary to cool the sintered materials and the inside of the housing 1 before the sintered materials can be taken out.
[0029] In order to accelerate the cooling rate of the temperature of the sintered materials and inside the housing 1, a cooling section with a jacket air-cooling structure is installed on the housing 1, and normal-temperature gas enters through the bottom of the kiln. An exhaust fan (not shown in the figure) installed on the exhaust main pipeline 2 evacuates the gas entering the kiln, realizing heat exchange between the kiln jacket and the inside of the kiln to take away heat. However, when the cooling section is short, this cooling method cannot achieve the target cooling effect, and the furnace outlet temperature of the sintered materials is higher than the target furnace outlet temperature.
[0030] As Figure 2As shown in the figure, in order to make the temperature reduction rate of the sintered material and the temperature inside the housing 1 meet the actual requirements, a first branch pipe 21 is fixedly connected to the exhaust main pipe 2. At the end of the first branch pipe 21 far from the exhaust main pipe 2, a second branch pipe 23 is fixedly connected. One end of the second branch pipe 23 is flange-connected to a finned tube 231, and the finned tube 231 penetrates through the housing 1.
[0031] Specifically, when it is necessary to cool the inside of the housing 1, the exhaust fan installed on the exhaust main pipe 2 starts to draw air. Since the exhaust main pipe 2 is in series with the first branch pipe 21, the second branch pipe 23, and the finned tube 231, air will flow into the pipe from the opening of the finned tube 231, flow towards the exhaust main pipe 2, and finally be discharged from the exhaust main pipe 2. Because the finned tube 231 increases the contact area with the high-temperature air inside the housing 1, the efficiency of heat transfer between the normal-temperature air in the finned tube 231 and the high-temperature air in the housing 1 increases, so the cooling time of the air inside the housing 1 can be accelerated.
[0032] In order to further accelerate the temperature reduction of the sintered material and the temperature inside the housing 1, a fan 3 is installed on the housing 1. One end of the fan 3 is connected to an intake main pipe 31. After the intake main pipe 31 penetrates through the bottom wall of the housing 1, it is connected to a third branch pipe 32. A plurality of air outlets 321 are provided in the upper part of the third branch pipe 32, and the opening directions of the air outlets 321 blow towards the finned tube 231. The air blown out from the air outlets 321 can make the gas temperature inside the housing 1 more balanced and ensure the heat dissipation effect of the finned tube 231.
[0033] Preferably, the distance between the third branch pipe 32 and the bottom wall of the housing 1 is 4 - 6 cm, which can increase the flow rate of the gas inside the housing 1 and thus have a better heat dissipation effect.
[0034] In order to prevent the temperature of the housing 1 from being too high during the firing process and the high-temperature gas from damaging the exhaust fan on the exhaust main pipe 2, a flap valve 22 is also installed on the first branch pipe 21. When the housing 1 is working, the flap valve 22 is closed to prevent the air in the finned tube 231 and the second branch pipe 23 from entering the exhaust main pipe 2, protecting the exhaust fan on the exhaust main pipe 2. Similarly, the fan 3 and the intake main pipe 31 are in a plug-in connection. When the housing 1 is being fired, the intake main pipe 31 can be pulled out from the fan 3 and sealed with heat-resistant materials.
[0035] As Figures 2 to 3 shown, because when cooling the material and air inside the housing 1, the air in the finned tube 231 needs to be continuously extracted, which causes air to continuously enter from the opening of the finned tube 231, forming wind at the opening of the finned tube 231. Also, because the amount of dust around the kiln is much larger than that in the normal environment, dust will enter the finned tube 231 and accumulate over time, which will deteriorate the heat dissipation effect of the finned tube 231. Replacing the finned tube 231 is relatively troublesome and costly.
[0036] To extend the service life of the finned tube 231, a dust-proof component 4 is installed at the opening of the finned tube 231. A dust-proof tube 41 is provided on the dust-proof component 4, and a metal filter screen 42 is installed at the front end of the dust-proof tube 41. The metal filter screen 42 can filter dust. However, during use, dust will accumulate on the metal filter screen 42, resulting in poor air intake effect of the metal filter screen 42 and affecting the cooling efficiency.
[0037] As Figures 2 to 5 shown, in order to prevent the metal filter screen 42 from being blocked by dust, a rotating bearing 43 is fixedly connected to the center of the metal filter screen 42, and a rotating shaft 44 is rotatably connected to the rotating bearing 43. A fan blade 441 is welded to one end of the rotating shaft 44 away from the rotating bearing 43, and a scraping strip 442 is welded to the end of the rotating shaft 44 close to the rotating bearing 43, and the scraping strip 442 is in contact with the surface of the metal filter screen 42.
[0038] Specifically, the dust-proof tube 41 is sleeved at the opening of the finned tube 231. When the wind enters from the opening of the dust-proof tube 41, the fan blade 441 will drive the rotating shaft 44 and the scraping strip 442 to rotate. When the scraping strip 442 rotates, it can clean the dust accumulated on the metal filter screen 42, and can always keep the metal filter screen 42 from being blocked by dust.
[0039] Furthermore, in order to reduce the wind resistance and minimize the blockage of the wind by the fan blade 441 and the scraping strip 442, the scraping strip 442 is arranged directly behind the fan blade 441, so that the wind only blows on the fan blade 441 and the scraping strip 442 does not block the wind from entering the dust-proof tube 41.
[0040] As Figure 2 、 Figure 5 and Figure 6 shown, when particles smaller than the filtering holes of the metal filter screen 42 fall on the surface of the metal filter screen 42, the rotating scraping strip 442 can sweep them off, but there will still be particles entering the dust-proof tube 41 through the filtering holes of the metal filter screen 42. In order to prevent such particles from further entering the finned tube 231, a dust-blocking ring 411 is welded to the inner wall of the dust-proof tube 41. When the particles enter the dust-proof tube 41 through the filtering holes of the metal filter screen 42, due to the small initial velocity, they will fall on the inner wall of the lower half of the dust-proof tube 41, and the dust-blocking ring 411 can block such particles.
[0041] Furthermore, a dust leakage port 412 is opened at the lower part of the dust-proof tube 41, and the side wall of the dust leakage port 412 is flush with the side wall of the dust-blocking ring 411. A collection box 45 matching the dust leakage port 412 is adhered to the outer wall of the dust-proof tube 41, and the particles are blocked by the dust-blocking ring 411 and thus collected by the collection box 45.
[0042] Further, since the collection box 45 is adhesively attached to the dust-proof pipe 41, when the particles collected in the collection box 45 reach a certain level, it can be removed, the dust particles can be poured into the trash can, and then after aligning the collection box 45 with the dust leakage port 412, it can be pressed against the outer wall of the dust-proof pipe 41.
[0043] During use, first open the flap valve 22, and then start the exhaust fan on the main exhaust pipeline 2. The operation of the exhaust fan drives the air flow in the main exhaust pipeline 2, the first branch pipe 21, the second branch pipe 23, and the finned pipe 231. Heat exchange is generated between the fins on the finned pipe 231 and the high-temperature gas, thereby taking away heat to achieve the purpose of cooling. Since the fins of the finned pipe 231 greatly increase the heat exchange area, a better cooling effect can be achieved. And the dust-proof component 4 provided at the opening of the finned pipe 231 can filter dust to protect the finned pipe 231, ensure the cooling effect of the finned pipe 231, and extend the service life of the finned pipe 231. At the same time, start the fan 3. The air blown into the fan 3 is ejected from the air outlet 321 after passing through the main intake pipeline 31 and the third branch pipe 32, making the temperature inside the housing 1 more balanced and ensuring the cooling efficiency.
[0044] Through the mutual cooperation of the finned pipe 231 and the air supply component, even if the cooling section of the housing 1 is short, the target cooling effect can be achieved. Further, when the cooling section of the housing 1 is not short, the cooling effect can also be accelerated and the production efficiency can be improved.
[0045] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
[0046] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A roller kiln cooling structure, comprising a shell, on which an exhaust main line is installed, characterized in that: An air supply assembly is also installed on the shell, a first branch pipe is installed on the main exhaust pipe, a second branch pipe is installed on the first branch pipe, a fin tube is fixedly connected to one end of the second branch pipe away from the first branch pipe, and the fin tube runs through the shell.
2. A roller kiln cooling structure according to claim 1, characterized in that: A flap valve is installed between the first branch pipe and the second branch pipe.
3. A roller kiln cooling structure according to claim 1, characterized in that: The air supply assembly comprises a fan, an air intake main line is plugged into the fan, and a third branch pipe is fixedly connected to one end of the air intake main line away from the fan.
4. A roller kiln cooling structure according to claim 3, characterized in that: The main air intake passage is 4-6 cm high from the bottom wall of the shell.
5. A roller kiln cooling structure according to claim 3, characterized in that: The third branch pipe is provided with an air outlet, and the opening of the air outlet is perpendicular to the fin tube.
6. A roller kiln cooling structure according to any one of claims 1 to 5, characterized in that: A dustproof component is installed at one end of the fin tube.
7. A roller kiln cooling structure according to claim 6, characterized in that: The dustproof assembly is provided with a dustproof tube, one end of the dustproof tube away from the fin tube is installed with a metal filter, and a rotating bearing is fixedly connected to the metal filter.
8. A roller kiln cooling structure according to claim 7, characterized in that: A rotating shaft is rotatably connected to the rotating bearing, a fan blade is fixedly connected to one end of the rotating shaft away from the rotating bearing, and a scraper strip is also fixedly connected to the rotating shaft, one end of the scraper strip contacts the surface of the rotating bearing.
9. A roller kiln cooling structure according to claim 8, characterized in that: A dust-blocking ring is fixedly connected inside the dust-proof tube, and a dust-leaking port is opened on the dust-proof tube.
10. A roller kiln cooling structure according to claim 9, characterized in that: A collection box is bonded to the outer wall of the dustproof tube, and the collection box matches the dust leakage port.