Ash-leakage-proof sealing structure of steam dryer coil pipe

Abstract

The utility model provides an ash-leakage-proof sealing structure of a steam dryer coil pipe, which is characterized in that a sealing sleeve is sleeved on a steam coil pipe main pipe and is arranged between the steam coil pipe main pipe and a dryer tail panel, and the outer section of the sealing sleeve forms the sealing fit between the steam coil pipe main pipe and the dryer tail panel; the inner section of the sealing sleeve forms a swing gap for the steam coil main pipe to swing between the steam coil main pipe and the tail panel of the drying machine, and the outer section of the sealing sleeve forms sealing fit between the steam coil main pipe and the tail panel of the drying machine and allows the steam coil main pipe and the inner section of the sealing sleeve to swing at a small angle. Therefore, long-term effective sealing between the steam coil main pipe and the dryer tail panel is achieved.

Description

Technical Field

[0001] The utility model belongs to the sealing field of drying equipment, and in particular relates to an anti-ash leakage sealing structure of a steam drying machine coil. Background Art

[0002] The ore powder drying kiln is an upstream operation procedure of the flash smelting furnace. The mixed copper concentrate with a water content of about 10% coming out of the concentrate batching bin is sent to the ore powder drying kiln through the batching conveyor belt. A large number of steam pipelines are arranged in the ore powder drying kiln. The ore is in contact with the steam pipe in the drying kiln. Through heat conduction, the ore (ore powder) is heated and the evaporation of water vapor is accelerated to achieve the drying effect. After drying, the dry copper concentrate with a water content of ≤0.3% is discharged from the discharge hopper of the drying kiln and enters the intermediate dry ore bin corresponding to the dryer. There are 45 coils in the steam dryer kiln body, which are distributed in a fan shape in 5 areas. The two main pipes of each coil need to be sealed at the panel passing through the tail of the dryer to prevent ash leakage. The two steam dryers have 90 coils with a total of 180 seals.

[0003] In the prior art, sealant is first applied on the sealing bottom plate, then put on the coil main pipe and close to the drying tail panel, then install the sealing pressure ring and the sealing packing, use the sealing pressure ring to compact the sealing packing, and finally use the bolt structure to press the flange pressure plate tightly on the sealing pressure ring to play a sealing role. However, during the operation of the steam dryer, the coil will have a slight weightlessness and shake when it moves downward from the top, which will drive the coil main pipe to shake slightly. Because the coil main pipe is supported by the sealing structure at the tail and the panel, the sealing pressure ring will also begin to loosen during the long-term operation and shaking of the dryer coil, and even cause the packing to fall off and fail. When the sealing structure fails, due to the compact sealing structure, small on-site space and tight maintenance time, it is basically impossible to re-apply sealant to seal. Even if the packing is replaced and restored, the sealing effect is poor, which will aggravate the leakage of ash at the gap. The sealing packing will begin to leak ash after six or seven months of use, while the maintenance date of the steam dryer coil is once a year and a half, resulting in the inability of the equipment to operate stably for a long time. Utility Model Content

[0004] The utility model aims to provide a dust leakage prevention sealing structure for a steam dryer coil, aiming to achieve long-term effective sealing between the steam coil main pipe and the dryer tail panel.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dust leakage prevention sealing structure for a steam dryer coil, wherein a sealing sleeve is arranged between the steam coil main pipe and the dryer tail panel, the sealing sleeve is placed on the steam coil main pipe, the outer section of the sealing sleeve forms a sealing fit between the steam coil main pipe and the dryer tail panel, and the inner section of the sealing sleeve forms a swing gap between the steam coil main pipe and the dryer tail panel for the steam coil main pipe to swing.

[0007] In the above scheme, the sealing sleeve is placed on the steam coil main pipe and between the steam coil main pipe and the rear panel of the dryer. The outer section of the sealing sleeve constitutes a sealing fit between the steam coil main pipe and the rear panel of the dryer. The inner section of the sealing sleeve constitutes a swing gap between the steam coil main pipe and the rear panel of the dryer for the steam coil main pipe to swing. The outer section of the sealing sleeve constitutes a sealing fit between the steam coil main pipe and the rear panel of the dryer, allowing the steam coil main pipe and the inner section of the sealing sleeve to swing at a small angle, thereby achieving long-term effective sealing between the steam coil main pipe and the rear panel of the dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0010] like Figures 1-2 The illustrated embodiment shows a dust leakage prevention sealing structure of a steam dryer coil, wherein a sealing sleeve 30 is provided between the steam coil main pipe 10 and the dryer rear panel 20, wherein the sealing sleeve 30 is sleeved on the steam coil main pipe 10, wherein an outer section 30a of the sealing sleeve 30 forms a sealing fit between the steam coil main pipe 10 and the dryer rear panel 20, and an inner section 30b of the sealing sleeve 30 forms a swinging gap between the steam coil main pipe 10 and the dryer rear panel 20 for the steam coil main pipe 10 to swing.

[0011] In the above scheme, a sealing sleeve 30 is provided between the steam coil main pipe 10 and the dryer rear panel 20, and the outer section 30a of the sealing sleeve 30 constitutes a sealing match between the steam coil main pipe 10 and the dryer rear panel 20, thereby avoiding the occurrence of ash leakage, and the inner section 30b of the sealing sleeve 30 constitutes a swing gap between the steam coil main pipe 10 and the dryer rear panel 20 for the steam coil main pipe 10 to swing. Because the shaking of the steam coil main pipe 10 is inevitable during the operation of the steam dryer, in this scheme, even if the steam coil main pipe 10 has a slight weightlessness shaking, due to the existence of the inner section 30b of the sealing sleeve 30, the steam coil main pipe 10 always swings in the inner section 30b of the sealing sleeve 30 during the long-term operation shaking of the steam coil main pipe 10. It can ensure that the outer section 30a of the sealing sleeve 30 always constitutes a sealing match between the steam coil main pipe 10 and the dryer rear panel 20, thereby ensuring the long-term effective sealing between the steam coil main pipe 10 and the dryer rear panel 20.

[0012] Furthermore, the inner ring surface of the sealing sleeve 30 is in contact with the surface of the steam coil main pipe 10, the outer ring surface of the outer section 30a of the sealing sleeve 30 is sealed with the dryer tail panel 20, and there is a swing gap between the outer ring surface of the inner section 30b of the sealing sleeve 30 and the dryer tail panel 20 for the steam coil main pipe 10 to swing.

[0013] In the above scheme, the inner ring surface of the outer section 30a of the sealing sleeve 30 is in contact with the surface of the steam coil main pipe 10, and the outer ring surface of the outer section 30a of the sealing sleeve 30 is in contact with the dryer tail panel 20, so that the gap between the steam coil main pipe 10 and the dryer tail panel 20 is completely blocked to achieve sealing, and there is a swing gap between the outer ring surface of the inner section 30b of the sealing sleeve 30 and the dryer tail panel 20 for the steam coil main pipe 10 to swing, and the inner section 30b of the sealing sleeve 30 can swing with the steam coil main pipe 10. During the operation of the steam dryer, the shaking of the steam coil main pipe 10 is inevitable. In this scheme, even if the steam coil main pipe 10 has a slight weightlessness shaking, the inner ring surface of the inner section 30b of the sealing sleeve 30 is always effectively in contact with the steam coil main pipe 10, and effective sealing can be performed.

[0014] Furthermore, the outer ring surface of the inner section 30b of the sealing sleeve 30 is a conical surface with a larger outer end and a smaller inner end. The inner section 30b of the sealing sleeve 30 forms a swing gap for the steam coil main pipe 10 to swing between the inner end of the outer section 30a and the dryer tail panel 20.

[0015] Furthermore, the outer end of the outer section 30a of the sealing sleeve 30 is provided with an external flange 31, and the flange 31 is placed on the outer side of the dryer tail panel 20. The sealing sleeve 30 is placed on the outer side of the dryer tail panel 20 through the external flange 31 at the outer end of the outer section 30a, so as to position the sealing sleeve 30 and prevent the sealing sleeve 30 from shifting. At the same time, the gap at the matching place between the sealing sleeve 30 and the outer side surface of the dryer tail panel 20 can be completely blocked to prevent the material from being washed to the seal at the outer end of the dryer tail panel 20 and the outer section 30a.

[0016] Furthermore, a flange pressing plate 40 is sleeved on the steam coil main pipe 10 located outside the sealing sleeve 30, and a bolt 60 is passed through the flange pressing plate 40. The inner end of the bolt 60 is threadedly engaged with the dryer tail panel 20, and the flange pressing plate 40 is pressed on the outer end surface of the sealing sleeve 30. The above scheme presses the sealing sleeve 30 through the flange pressing plate 40 to achieve a tight fit between the sealing sleeve 30, the steam coil main pipe 10 and the dryer tail panel 20.

[0017] Furthermore, a sealing ring 50 is provided between the flange pressure plate 40 and the sealing sleeve 30 , and the sealing ring 50 is used to further seal the outer end sealing portion between the sealing sleeve 30 and the steam coil main pipe 10 , thereby preventing dust from entering the outer end sealing portion between the sealing sleeve 30 and the steam coil main pipe 10 .

[0018] Furthermore, the sealing sleeve 30 is made of fluororubber, which is wear-resistant, high-temperature-resistant and not easy to harden. The fluororubber can be easily drawn inward to form a conical surface with a large outer end and a small inner end, thereby forming the inner section 30b of the sealing sleeve 30.

Claims

1. A dust leakage prevention sealing structure for a steam dryer coil, characterized in that: A sealing sleeve (30) is provided between the steam coil main pipe (10) and the dryer rear panel (20). The sealing sleeve (30) is placed on the steam coil main pipe (10). The outer section (30a) of the sealing sleeve (30) forms a sealing fit between the steam coil main pipe (10) and the dryer rear panel (20). The inner section (30b) of the sealing sleeve (30) forms a swing gap between the steam coil main pipe (10) and the dryer rear panel (20) for the steam coil main pipe (10) to swing.

2. The anti-ash leakage sealing structure of the steam dryer coil according to claim 1 is characterized in that: The inner ring surface of the sealing sleeve (30) is in contact with the surface of the steam coil main pipe (10), the outer ring surface of the outer section (30a) of the sealing sleeve (30) is in sealing contact with the dryer rear panel (20), and there is a swing gap between the outer ring surface of the inner section (30b) of the sealing sleeve (30) and the dryer rear panel (20) for the steam coil main pipe (10) to swing.

3. The anti-ash leakage sealing structure of the steam dryer coil according to claim 2 is characterized in that: The outer ring surface of the inner section (30b) of the sealing sleeve (30) is a conical surface with a larger outer end and a smaller inner end.

4. The dust leakage prevention sealing structure of the steam dryer coil according to claim 2, characterized in that: The outer end of the outer section (30a) of the sealing sleeve (30) is provided with an external flange (31), and the flange (31) is placed on the outer side surface of the rear panel (20) of the dryer.

5. The anti-ash leakage sealing structure of the steam dryer coil according to claim 1 or 4, characterized in that: A flange pressing plate (40) is sleeved on the steam coil main pipe (10) outside the sealing sleeve (30), and bolts (60) are passed through the flange pressing plate (40). The inner ends of the bolts (60) are threadedly matched with the dryer rear panel (20), and the flange pressing plate (40) is pressed on the outer end surface of the sealing sleeve (30).

6. The dust leakage prevention sealing structure of the steam dryer coil according to claim 5, characterized in that: A sealing pressure ring (50) is provided between the flange pressure plate (40) and the sealing sleeve (30).

7. The dust leakage prevention sealing structure of the steam dryer coil according to claim 1, characterized in that: The sealing sleeve (30) is made of fluororubber.

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