A sealing structure for kiln head

Abstract

The utility model discloses a sealing structure for a kiln head, comprising an L-shaped steel plate ring sleeve fixedly connected to the outer side surface of an end cover, the outer side surface of the L-shaped steel plate ring sleeve is fixedly connected with a circle of fish scale plates surrounding the outer surface of a kiln barrel, the inner side surface of the fish scale plates is fixedly connected with a second air locking return flow plate, and the bottom side of the front end of the L-shaped steel plate ring sleeve is fixedly connected with a first air locking return flow plate, the first air locking return flow plate is elastic, and the second air locking return flow plate is elastic. This structure utilizes a small amount of material to form a circle of blocking layer on the outer surface of the kiln barrel, so that the first air locking return flow plate and the second air locking return flow plate can quickly fit the outer surface of the kiln barrel when the kiln barrel is in an upward and downward working condition, thereby greatly avoiding leakage of materials with smaller particles from the fitting point of the fish scale plates and the kiln barrel and causing accelerated wear of the fish scale plates, greatly improving the service life of the fish scale plates, reducing production expenses, reducing the work intensity of employees, and improving the production efficiency of the kiln barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln head sealing, in particular to a sealing structure for a kiln head. Background Art

[0002] The kiln head of the rotary kiln needs to be sealed, mainly to prevent air leakage, air inlet, ash leakage and reduce heat loss in the kiln tube. Therefore, a suitable sealing structure will help improve the working efficiency of the kiln.

[0003] At present, the existing kiln head sealing structure generally extends a circle of L-shaped steel plate outside the kiln head cover, and then installs a circle of fish scale plate between the steel plate and the cylinder to form a seal, which is usually also called fish scale sealing structure and is widely used in actual production.

[0004] However, this sealing structure has a poor sealing effect on fine sand and powdery finished materials. Powder leakage may occur at the kiln head under positive pressure, and the materials in the kiln barrel will pass through the gap between the barrel cover and the barrel and accumulate between the fish-scale plate and the barrel. As a result, production has to be stopped every once in a while to clean the materials between the L-shaped steel plate, the fish-scale plate and the barrel, which greatly increases the labor intensity of employees and seriously hinders the normal production. In addition, as the rotary kiln moves up and down and expands and contracts due to heat, the fish-scale plate wears more quickly due to the addition of fine sand and powdery materials, which greatly reduces the service life of the fish-scale plate. New fish-scale plates have to be welded every once in a while. Utility Model Content

[0005] The utility model aims to provide a sealing structure for a kiln head to solve the problem in the background art that when dealing with fine sand powder products, the fish scale plate is used for sealing, which is prone to powder leakage and accelerates the wear of the fish scale plate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing structure for a kiln head, used for sealing the connection between the kiln barrel and the end cover, comprising an L-shaped steel plate ring sleeve fixedly connected to the outer side of the end cover, the outer side of the L-shaped steel plate ring sleeve is fixedly connected with a circle of fish scale plates around the outer surface of the kiln barrel, the inner side of the fish scale plates is fixedly connected with a second air lock return plate, and the bottom side of the front end of the L-shaped steel plate ring sleeve is fixedly connected with a first air lock return plate, the first air lock return plate is elastic, the second air lock return plate is elastic, the bottom end of the first air lock return plate is bent away from the end cover, and the bottom end of the second air lock return plate is bent toward the end cover.

[0007] Preferably, the bottom end of the L-shaped steel plate ring sleeve is fixedly connected with a fishtail-shaped feed chute, and the fishtail-shaped feed chute is communicated with the interior of the L-shaped steel plate ring sleeve.

[0008] Preferably, the outer side surface of the fish scale plate is fixedly connected with a rope loop block, and a plurality of the fish scale plates are serially connected to the outer surface of the kiln tube by tensioning ropes passing through the rope loop block.

[0009] Preferably, the inner diameter of the end cover is larger than the outer diameter of the end of the kiln drum, so as to reduce the wear of the end cover when the kiln drum rotates.

[0010] Preferably, the fish scale plate is elastic.

[0011] Preferably, the fish scale plate and the L-shaped steel plate ring are fixed by screws, and the L-shaped steel plate ring and the end cover are fixed by welding.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. This structure utilizes a small amount of material to enter the space between the first air-locking return plate, the second air-locking return plate and the fish-scale plate to form a barrier layer on the outer surface of the kiln barrel. Under the pressure of the barrier layer and the elastic force of the first air-locking return plate and the second air-locking return plate, the first air-locking return plate and the second air-locking return plate quickly fit the outer surface of the kiln barrel when the kiln barrel is in up and down working conditions, thereby greatly avoiding the leakage of smaller particles of materials from the fitting point of the fish-scale plate and the kiln barrel and causing accelerated wear of the fish-scale plate, greatly improving the service life of the fish-scale plate, reducing the number of replacement times of the fish-scale plate, reducing production expenses, reducing the work intensity of employees, and improving the production efficiency of the kiln barrel.

[0014] 2. Through the L-shaped steel plate ring and the fishtail type feeding chute, the materials leaked or blown out from the gap between the kiln barrel and the end cover can fall into the fishtail type feeding chute under the action of the kiln barrel rotation or the material's own gravity, and then be collected by the staff from the bottom opening of the fishtail type feeding chute, which reduces the number of times of manually dismantling the fish scale plate to clean up the leaked materials, greatly reduces the work intensity, and does not interrupt the operation of the kiln barrel, further improving the operation efficiency of the kiln barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural view of the utility model;

[0016] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0017] Figure 3 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0018] Figure 4 It is a side view of the utility model.

[0019] In the figure: 1. kiln tube; 101. end cover; 2. fish scale plate; 201. rope loop block; 202. tension rope; 3. first air lock return plate; 301. second air lock return plate; 4. L-shaped steel plate ring; 401. fish tail type discharge chute. DETAILED DESCRIPTION

[0020] 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 in 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.

[0021] Embodiment 1:

[0022] See also Figures 1 to 4 The utility model provides a technical solution for a sealing structure of a kiln head:

[0023] A sealing structure for a kiln head, used for sealing the connection between the kiln barrel 1 and the end cover 101, comprising an L-shaped steel plate ring sleeve 4 fixedly connected to the outer side of the end cover 101, the outer side of the L-shaped steel plate ring sleeve 4 is fixedly connected with a circle of fish scale plates 2 around the outer surface of the kiln barrel 1, the inner side of the fish scale plates 2 is fixedly connected with a second air locking return plate 301, and the bottom side of the front end of the L-shaped steel plate ring sleeve 4 is fixedly connected with a first air locking return plate 3, the first air locking return plate 3 is elastic, the second air locking return plate 301 is elastic, the bottom end of the first air locking return plate 3 is bent away from the end cover 101, and the bottom end of the second air locking return plate 301 is bent toward the end cover 101, wherein it should be supplemented that the inner diameter of the end cover 101 is larger than the outer diameter of the end of the kiln barrel 1, which is used to reduce the wear of the end cover 101 when the kiln barrel 1 rotates, and the fish scale plates 2 are elastic and are used to provide space for the kiln barrel 1 to go up and down.

[0024] Working principle: When the kiln tube 1 starts to operate, when the air pressure in the kiln tube 1 is too high, the material will be blown out from the gap between the kiln tube 1 and the end cover 101 and enter the fishtail type feed chute 401. When the material is small and the kiln tube 1 is in an up-and-down operation condition, that is, the kiln tube 1 moves up and down a short distance, this process is a prior art and is used to reduce the degree of wear on the fish scale plate 2 or the end cover 101. No more details will be given here. In this process, a small amount of material will enter the first air lock return plate 3 and the second air lock return plate 301 under the action of the positive pressure in the L-shaped steel plate ring 4, and a short gap will appear between the kiln tube 1 due to the up-and-down operation condition and the first air lock return plate 3 and the second air lock return plate 301. In the space between the return plate 301 and the fish scale plate 2, a barrier layer is formed on the outer surface of the kiln tube 1. Under the pressure of the barrier layer and the elastic force of the first air locking return plate 3 and the second air locking return plate 301, the first air locking return plate 3 and the second air locking return plate 301 quickly adhere to the outer surface of the kiln tube 1 when the kiln tube 1 is in up and down working conditions, thereby greatly avoiding the leakage of smaller particles of materials from the fitting point of the fish scale plate 2 and the kiln tube 1 and causing accelerated wear of the fish scale plate 2, greatly improving the service life of the fish scale plate 2, reducing the number of replacement times of the fish scale plate 2, reducing production expenses, reducing the work intensity of employees, and improving the production efficiency of the kiln tube 1.

[0025] Embodiment 2:

[0026] Reference Figure 1 and Figure 4 As shown: the bottom end of the L-shaped steel plate ring sleeve 4 is fixedly connected with a fishtail type feed chute 401, and the fishtail type feed chute 401 is connected to the inside of the L-shaped steel plate ring sleeve 4. Through such an arrangement, the materials leaked or blown out from the gap between the kiln tube 1 and the end cover 101 can fall into the fishtail type feed chute 401 under the action of the rotation of the kiln tube 1 or the gravity of the materials themselves, and then be collected by the staff from the bottom opening of the fishtail type feed chute 401, which reduces the number of times of manually disassembling the fish scale plate 2 to clean the leaked materials, greatly reduces the work intensity, and does not interrupt the operation of the kiln tube 1, further improving the operation efficiency of the kiln tube 1.

[0027] Embodiment 3:

[0028] Reference Figure 4As shown: the outer side surface of the fish scale plate 2 is fixedly connected with a rope loop block 201, and a plurality of fish scale plates 2 are connected in series to the outer surface of the kiln tube 1 through the tensioning rope 202 passing through the rope loop block 201. Through such an arrangement, the plurality of fish scale plates 2 are fitted together, which greatly improves the sealing efficiency of the fish scale plates 2. At the same time, the fitting tightness between the fish scale plates 2 and the kiln tube 1 can be conveniently controlled. When the sealing performance of the fish scale plate 2 is reduced due to wear, the worn fish scale plate 2 can continue to fit the outer surface of the kiln tube 1 by tightening the tensioning rope 202, thereby improving the service life of the fish scale plate 2.

[0029] Embodiment 4:

[0030] The fish scale plate 2 and the L-shaped steel plate ring sleeve 4 are fixed by screws, and the L-shaped steel plate ring sleeve 4 and the end cover 101 are fixed by welding. Through such an arrangement, the damage to the L-shaped steel plate ring sleeve 4 can be reduced when the fish scale plate 2 is disassembled and replaced, thereby improving the service life of the L-shaped steel plate ring sleeve 4. The L-shaped steel plate ring sleeve 4 is welded to the end cover 101, which improves the stability of the L-shaped steel plate ring sleeve 4 to cope with the impact of materials leaking or blown out from the gap between the kiln tube 1 and the end cover 101, improves the stability of the L-shaped steel plate ring sleeve 4, and then improves the stability of the fish scale plate 2, and finally improves the sealing of the structure.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a kiln head, used for sealing the connection between a kiln barrel (1) and an end cover (101), characterized in that: The invention comprises an L-shaped steel plate ring sleeve (4) fixedly connected to the outer side surface of the end cover (101); the outer side surface of the L-shaped steel plate ring sleeve (4) is fixedly connected to a circle of fish scale plates (2) surrounding the outer surface of the kiln tube (1); the inner side surface of the fish scale plates (2) is fixedly connected to a second air locking return plate (301); the bottom side of the front end of the L-shaped steel plate ring sleeve (4) is fixedly connected to a first air locking return plate (3); the first air locking return plate (3) is elastic; the second air locking return plate (301) is elastic; the bottom end of the first air locking return plate (3) is bent away from the end cover (101); and the bottom end of the second air locking return plate (301) is bent toward the end cover (101).

2. A sealing structure for a kiln head according to claim 1, characterized in that: The bottom end of the L-shaped steel plate ring sleeve (4) is fixedly connected to a fishtail-shaped feed chute (401), and the fishtail-shaped feed chute (401) is communicated with the interior of the L-shaped steel plate ring sleeve (4).

3. The sealing structure for a kiln head according to claim 1, characterized in that: The outer side surface of the fish scale plate (2) is fixedly connected with a rope loop block (201), and a plurality of the fish scale plates (2) are connected in series to the outer surface of the kiln tube (1) through a tension rope (202) passing through the rope loop block (201).

4. The sealing structure for a kiln head according to claim 1, characterized in that: The inner diameter of the end cover (101) is larger than the outer diameter of the end of the kiln shell (1), so as to reduce the wear of the end cover (101) when the kiln shell (1) rotates.

5. The sealing structure for a kiln head according to claim 1, characterized in that: The fish scale plate (2) is elastic.

6. A sealing structure for a kiln head according to claim 1, characterized in that: The fish scale plate (2) and the L-shaped steel plate ring sleeve (4) are fixed by means of screws, and the L-shaped steel plate ring sleeve (4) and the end cover (101) are fixed by means of welding.

Images