Improved rotary kiln bar screen supporting device

Abstract

The utility model discloses an improved rotary kiln bar screen supporting device which comprises an upper supporting piece, a middle supporting piece and a lower supporting piece which are transversely arranged at intervals in parallel, the upper supporting piece, the middle supporting piece and the lower supporting piece are used for erecting an obliquely-arranged bar screen, and the lower supporting piece is located at an opening of a kiln head cover at the discharging end of a rotary kiln. The upper supporting piece and the middle supporting piece are located in the kiln head cover, the two ends of the upper supporting piece and the two ends of the middle supporting piece extend out of the outer end of the kiln head cover and are erected through supports in a supporting mode, flexible materials are arranged between the upper supporting piece and the kiln head cover and between the middle supporting piece and the kiln head cover in a filling mode, and cooling channels are formed in the upper supporting piece and the middle supporting piece. And a cooling fan for introducing cooling air into the upward supporting piece and the middle supporting piece is arranged on the outer side of the kiln head cover. According to the utility model, an air cooling mode is adopted, so that the water leakage condition caused by a water cooling mode can be avoided, the potential safety hazard is reduced, the influence on the side wall brick body is avoided, the support piece can be overhauled on the premise of not influencing the production, the production efficiency is improved, and the post operation environment is improved.

Description

Technical Field

[0001] The utility model relates to rotary kiln screening equipment, in particular to an improved rotary kiln bar screen supporting device. Background Art

[0002] The rotary kiln is a rotary cylinder equipment, which is mainly used to sinter and roast ores, concentrates, intermediates, etc., to provide products for the next process. Due to its simple operation, stable operation, strong adaptability to raw materials, etc., it is widely used in cement, smelting and other industries.

[0003] The qualified roasted sand produced by the rotary kiln is required to have a certain particle size. If the particle size is too large, it will have a certain impact on the production of the rotary kiln and the equipment of the next process. Therefore, a bar screen is set at the discharge end of the kiln head to facilitate the screening of large-volume agglomerated materials for separate treatment. For example, the patent publication number is: CN 112857029 A discloses a rotary kiln head cover based on vibration screening, including a shell, a support assembly, a grate screen assembly, a vibration assembly and an automatic unloading assembly. The support assembly includes two connecting beams and support members arranged at both ends of each connecting beam. The two connecting beams pass through the shell horizontally, and the relative height of the two connecting beams is adjustable. The grate screen assembly includes a grate screen bracket and a grate screen arranged on the grate screen bracket. The grate screen bracket is tilted on the two connecting beams. The grate screen bracket adjusts its tilt angle by adjusting the relative height of the two connecting beams, so that the clinker can always be dispersed and screened at the most suitable tilt angle. The vibration component is connected with the grate screen bracket. The vibration component can drive the grate screen to vibrate through the grate screen bracket, so that the agglomerated large materials and qualified clinker falling on the grate screen can be quickly dispersed and screened, avoiding the generation of new agglomerates due to long-term aggregation and improving the discharge quality of the rotary kiln.

[0004] The existing bar screen support is generally made of two levels, the upper support is made of pipes, and is cooled by circulating water, while the lower support is made of solid cast iron. Due to the high temperature inside the kiln head cover and the poor working environment, the upper support of the bar screen exposed some problems during use.

[0005] Mainly: 1. The upper support of the bar screen is in the high temperature area. Since the support is built in the walls on both sides of the kiln head cover and is impacted by the baked sand, it is easy to cause the upper support to deform and sink, which in turn affects the wall strength and causes brick falling. In addition, the replacement of the upper support requires the annual maintenance and removal of the side walls of the kiln head cover, which affects normal production;

[0006] 2. Since the upper support is a circular pipe, it is easy to deform in a high temperature environment. Although water cooling can extend the service life, deformation and burning can easily lead to water leakage, which poses a safety hazard and affects the quality of roasted sand.

[0007] Therefore, it is necessary to improve the rotary kiln screen support structure. Utility Model Content

[0008] The purpose of the utility model is to overcome the defects and shortcomings of the prior art, provide an improved rotary kiln screen support device, and solve various problems existing in the prior art.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An improved rotary kiln screen support device comprises an upper support member, a middle support member and a lower support member which are arranged in parallel and transversely at intervals, the upper support member, the middle support member and the lower support member are used to set up the inclined screen, the lower support member is located at the mouth of a kiln head cover at the discharge end of the rotary kiln, the upper support member and the middle support member are located inside the kiln head cover, the two ends of the upper support member and the middle support member extend to the outer end of the kiln head cover and are respectively supported and set up by brackets, the upper support member, the middle support member and the kiln head cover are filled and installed with flexible materials, the upper support member and the middle support member are provided with cooling channels inside, and the outer side of the kiln head cover is provided with a cooling fan for introducing cooling air to the upper support member and the middle support member.

[0011] The upper support member and the middle support member are component structures, and the middle support section is a hollow triangular structure.

[0012] The upper support member and the middle support member are hollow triangular structures made of welded and bent steel plates. The middle part of the triangular body is a cooling channel, and the air inlet end of the cooling channel is connected with an end connecting pipe for convenient connection to the cooling pipeline.

[0013] An end plate is welded to the triangular end of the air inlet end of the cooling channel, a through hole is opened in the middle of the end plate, and the end connecting pipe is welded and fixed to the through hole.

[0014] The inner side walls of the upper support member and the middle support member are provided with convex ribs that are arranged in a crisscross pattern at intervals.

[0015] A plurality of spaced-apart limiting plates are welded on the upper support member, and grooves for fixing the bar screen are formed between the limiting plates.

[0016] The air outlet of the cooling fan is connected to a main cooling pipe, and the main cooling pipe is connected to the cooling channels of the upper support and the middle support through a branch cooling pipe, and a regulating valve is installed in the main cooling pipe, and the other end of the upper support and the middle support is an air outlet.

[0017] Inspection doors for convenient inspection of the upper support member and the middle support member are provided on the side walls of the kiln head cover corresponding to the two ends of the upper support member and the middle support member.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model has a reasonable structural design, in which the bar screen support adopts air cooling, which can avoid the problems caused by the bending of the support on the one hand, and avoid water leakage in the water cooling method on the other hand, thereby reducing safety hazards; and because the support adopts an external independent bracket support method, the impact on the side wall brick body is avoided, and the support can be repaired without affecting production, thereby improving production efficiency and improving the job environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the front structure of a rotary kiln grading and screening device;

[0021] Figure 2 It is a schematic diagram of the side structure of a rotary kiln grading and screening device;

[0022] Figure 3 is a schematic diagram of the upper support structure;

[0023] Figure 4 is a schematic diagram of the structure of the middle support member;

[0024] Figure 5 It is a schematic diagram of the structure of a triangle with convex ribs on the inner wall.

[0025] Reference numerals:

[0026] 1. Kiln head cover; 2. Screen bar; 3. Upper support; 4. Middle support; 5. Lower support; 6. Inspection door; 7. Bracket; 8. Flexible material; 9. Cooling fan; 10. Regulating valve; 11. Main cooling pipeline; 12. Cooling channel; 13. End connecting pipe; 14. End plate; 15. Convex rib; 16. Limit plate; 17. Groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See attached Figure 1-5 ;

[0029] An improved rotary kiln bar screen support device comprises an upper support member 3, a middle support member 4 and a lower support member 5 which are arranged in parallel and transversely at intervals. The upper support member 3, the middle support member 4 and the lower support member 5 are used to set up an inclined bar screen 2. The lower support member 5 is located at the mouth of the kiln head cover 1 at the discharge end of the rotary kiln. The upper support member 3 and the middle support member 4 are located inside the kiln head cover 1. The two ends of the upper support member 3 and the middle support member 4 extend to the outer end of the kiln head cover 1 and are supported and set up by brackets 7 respectively. The upper support member 3, the middle support member 4 and the kiln head cover 1 are filled and installed with a flexible material 8. The upper support member 3, the middle support member 4 and the kiln head cover 1 are provided with a cooling channel 12 inside. The outer side of the kiln head cover 1 is provided with a cooling fan 9 for passing cooling air to the upper support member 3 and the middle support member 4. Independent brackets are installed on both sides of the upper and middle support members to avoid the influence on the side wall brick body. The upper and middle support members are connected to the side wall baffle working door with bolt flanges to facilitate the replacement of the upper support member and the middle support member. Flexible sealing materials are installed inside.

[0030] Furthermore, the upper support member 3 and the middle support member 4 are component structures, and the middle support section is a hollow triangular structure. The hollow triangular structure allows cold air to flow into the interior on the one hand, and on the other hand, the stability of the triangular structure is utilized to enhance the supporting force of the upper support member and the middle support member. The upper support member 3 and the middle support member 4 are hollow triangular structures made of steel plates welded and bent, and the middle part of the triangular body is a cooling channel 12, and the air inlet end of the cooling channel 12 is connected with an end connecting pipe 13 for convenient connection to the cooling pipe. An end plate 14 is welded to the end of the triangular body at the air inlet end of the cooling channel 12, and a through hole is provided in the middle of the end plate 14, and the end connecting pipe 13 is welded and fixed to the through hole. The structure of the connecting pipe facilitates communication with the cooling pipe, and the triangular body is made of steel plates bent and welded, and its manufacturing structure is simple and the cost is low.

[0031] The inner side walls of the upper support member 3 and the middle support member 4 are provided with interlaced convex ribs 15. The interlaced convex ribs greatly enhance the strength of the upper support member and the middle support member, and at the same time increase the surface area of ​​the inner side wall, so that it can fully contact with the cold air, thereby increasing the cooling effect.

[0032] A plurality of spaced limiting plates 16 are welded on the upper support 3, and grooves 17 for fixing the screen bars are formed between the limiting plates 16. The structure of the groove is used to fix the screen bars, the middle support is a plane that plays an auxiliary supporting role, and the steel plate of the triangle is welded and made of a steel plate with a thickness of 2030mm.

[0033] Furthermore, the air outlet of the cooling fan 9 is connected to a main cooling duct 11, which is connected to the cooling channels of the upper support 3 and the middle support 4 through a branch cooling duct, and a regulating valve 10 is installed in the main cooling duct 11, and the other end of the upper support 3 and the middle support 4 is an air outlet. The cooling air volume passing through the upper support and the middle support can be adjusted by the regulating valve.

[0034] Further, the side walls of the kiln head cover 1 corresponding to the ends of the upper support member 3 and the middle support member 4 are provided with maintenance doors 6 for convenient maintenance of the upper support member and the middle support member. The maintenance doors are provided on both sides of the kiln head cover to facilitate the maintenance and replacement of the upper and middle support members.

[0035] The kiln head hood in the structure of the present application is the discharge end of the rotary kiln, and the bar screen is a plurality of independent or connected grid-type bar screens, which are jointly supported and erected by upper support members, middle support members, and lower support members arranged at intervals. Inspection doors are provided on both side walls of the kiln head hood to facilitate the inspection and replacement of the upper and middle support members, and flexible materials are used to fill the space between the upper and middle support members and the side walls to prevent smoke return. A group of brackets are installed at each end of the upper and middle support members, and the cooling fan is located on one side of the upper support member to provide forced air cooling for the upper and middle support members and then exhaust them. The outlet of the cooling fan is connected to the regulating valve and the pipeline in sequence.

[0036] During production, the materials in the kiln are screened on the bar screen, the screened materials fall into the roasted sand bin, and the screened materials roll out of the bin. The cooling fan is always on to provide cooling air for the upper and middle supports, so as to cool the support components and avoid the impact of roasted sand, which may easily cause the upper supports to deform and sink, thereby affecting the wall strength and causing brick falling. In addition, the replacement of the upper supports requires the annual removal of the side walls of the kiln head cover, which affects normal production. The upper and middle supports are independently supported by the kiln head cover external bracket and are equipped with an inspection door, so that the upper and middle supports can be inspected and replaced without removing the side walls.

[0037] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0038] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. An improved rotary kiln screen support device, characterized in that: The invention comprises an upper support member (3), a middle support member (4) and a lower support member (5) which are arranged in parallel and transversely at intervals. The upper support member (3), the middle support member (4) and the lower support member (5) are used to set up an inclined bar screen (2). The lower support member (5) is located at the mouth of a kiln head cover (1) at the discharge end of a rotary kiln. The upper support member (3) and the middle support member (4) are located inside the kiln head cover (1). Both ends of the upper support member (3) and the middle support member (4) extend to the outer end of the kiln head cover (1) and are supported and set up by brackets (7) respectively. A flexible material (8) is used to fill and install between the upper support member (3), the middle support member (4) and the kiln head cover (1). A cooling channel (12) is arranged inside the upper support member (3) and the middle support member (4). A cooling fan (9) for passing cooling air to the upper support member (3) and the middle support member (4) is arranged outside the kiln head cover (1).

2. The improved rotary kiln screen support device according to claim 1 is characterized in that: The upper support member (3) and the middle support member (4) are component structures, wherein the middle support section is a hollow triangular structure.

3. The improved rotary kiln screen support device according to claim 2 is characterized in that: The upper support member (3) and the middle support member (4) are hollow triangular structures made of welded and bent steel plates, the middle of the triangular structure is a cooling channel (12), and the air inlet end of the cooling channel (12) is connected to an end connecting pipe (13) for convenient connection to a cooling pipeline.

4. The improved rotary kiln screen support device according to claim 3 is characterized in that: An end plate (14) is welded to the triangular end of the air inlet end of the cooling channel (12), a through hole is opened in the middle of the end plate (14), and the end connecting pipe (13) is welded and fixed to the through hole.

5. The improved rotary kiln screen support device according to claim 3 is characterized in that: The inner side walls of the upper support member (3) and the middle support member (4) are provided with convex ribs (15) arranged in a crisscross pattern at intervals.

6. The improved rotary kiln screen support device according to claim 1 is characterized in that: A plurality of spaced-apart limiting plates (16) are welded to the upper support member (3), and grooves (17) for fixing the screen bars are formed between the limiting plates (16).

7. The improved rotary kiln screen support device according to claim 1 is characterized in that: The air outlet of the cooling fan (9) is connected to a main cooling pipe (11), the main cooling pipe (11) is connected to the cooling channels of the upper support member (3) and the middle support member (4) through a branch cooling pipe, and a regulating valve (10) is installed in the main cooling pipe (11), and the other end of the upper support member (3) and the middle support member (4) is an air outlet.

8. The improved rotary kiln screen support device according to claim 1 is characterized in that: Inspection doors (6) for convenient inspection of the upper support member (3) and the middle support member (4) are provided on the side walls of the kiln head cover (1) corresponding to the two ends of the upper support member (3) and the middle support member (4).

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