Online replacement device for sintering large flue branch pipe

Abstract

The utility model relates to an online replacement device for a sintering large flue branch pipe, and belongs to the technical field of sintering machines. Comprising a sintering machine air bellow, a horizontally-arranged large flue body is arranged in the sintering machine air bellow, a plurality of branch pipes arranged at intervals are arranged on the large flue body, lower stop valves are arranged at the lower ends of the branch pipes, the lower stop valves are arranged in the large flue body, upper stop valves are arranged at the upper ends of the branch pipes, and the lower stop valves are arranged in the large flue body. The upper end of the upper stop valve penetrates through the sintering machine air bellow, the upper stop valve is arranged outside the sintering machine air bellow, and a branch pipe hoisting piece is arranged on the periphery of the branch pipe; a pipeline is arranged on the air bellow of the sintering machine, the upper end of a branch pipe is sleeved with the pipeline, pipeline supporting lifting points are symmetrically arranged in the pipeline, first electric slings are installed on the pipeline supporting lifting points respectively, and branch pipe lifting pieces are arranged on hooks of the first electric slings in a hooking mode respectively. Even if the branch pipe is sucked to be flat, stable sintering production can still be guaranteed, and the branch pipe can be rapidly and effectively replaced online.

Description

Technical Field

[0001] The utility model relates to an online replacement device for a sintering large flue branch pipe, belonging to the technical field of sintering machines. Background Art

[0002] At present, there are generally 20-40 branch pipes used in the sintering flue. In order to ensure their service life, the current method is to continuously change their wear resistance to improve their service life. However, no matter how they are improved, the branch pipes will still reach their service limit. After reaching the service limit, we need to replace them. However, the inspection of branch pipes is often delayed, and because there are many branch pipes, they are prone to multiple occurrences. If the deterioration state of the branch pipes is not accurately estimated within an inspection cycle, it will often cause multiple branch pipes to be sucked and deflated at the same time, thus affecting the entire sintering production, or even stopping production. The replacement is difficult, time-consuming, and has high safety risks. If an accident occurs without preparation, it often takes more than 24 hours or even longer for a single branch pipe to recover. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an online replacement device for sintering large flue branch pipes in view of the above-mentioned prior art. Even if the branch pipes are deflated by suction, stable sintering production can still be guaranteed, and the branch pipes can be replaced online quickly and effectively.

[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: an online replacement device for a sintering large flue branch pipe, comprising a sintering machine bellows, a horizontally arranged large flue body is arranged in the sintering machine bellows, a plurality of spaced branch pipes are arranged on the large flue body, a lower cut-off valve is arranged at the lower end of the branch pipe, the lower cut-off valve is arranged in the large flue body, an upper cut-off valve is arranged at the upper end of the branch pipe, the upper end of the upper cut-off valve passes through the sintering machine bellows and the upper cut-off valve is arranged outside the sintering machine bellows, and a branch pipe hanging piece is arranged at the outer periphery of the branch pipe; a pipeline is arranged on the sintering machine bellows, the pipeline is sleeved on the upper end of the branch pipe, pipeline support hanging points are symmetrically arranged in the pipeline, first electric lifting slings are respectively installed on the pipeline support hanging points, and the hooks of the first electric lifting slings are respectively hooked with branch pipe hanging pieces.

[0005] A compensator is also provided, which is sleeved on the branch pipe and arranged above the upper cut-off valve.

[0006] A second electric lifting sling is also arranged in the sintering machine wind box, and a hook of the second electric lifting sling is hooked with a branch pipe lifting piece.

[0007] When replacing the branch pipe, the upper cut-off valve and the lower cut-off valve are both in a closed state.

[0008] Compared with the prior art, the advantages of the utility model are: an online replacement device for a sintering large flue branch pipe. When a branch pipe is deflated, the upper cut-off valve and the lower cut-off valve on the corresponding branch pipe are closed to ensure stable sintering production. Through the cooperation of the first electric lifting sling and the second electric lifting sling, the branch pipe can be replaced quickly and effectively online. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of an online replacement device for a sintered large flue branch pipe according to an embodiment of the utility model;

[0010] Figure 2 A schematic diagram of a branch pipe replacement device for an online replacement of a sintering large flue branch pipe according to an embodiment of the utility model;

[0011] In the figure, 1 is a large flue body, 2 is a lower shut-off valve, 3 is a branch pipe, 4 is a branch pipe hanging piece, 5 is an upper shut-off valve, 6 is a sintering machine bellows, 7 is a compensator, 8 is a pipeline support hanging point, 9 is a pipeline, and 10 is a second electric lifting sling. DETAILED DESCRIPTION

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] like Figure 1 , 2 As shown, an online replacement device for a sintering flue branch pipe in this embodiment includes a sintering machine bellows 6, a horizontally arranged flue body 1 is arranged in the sintering machine bellows 6, and a plurality of branch pipes 3 arranged at intervals are arranged on the flue body 1. A lower cut-off valve 2 is arranged at the lower end of the branch pipe 3, and the lower cut-off valve 2 is arranged in the flue body 1. An upper cut-off valve 5 is arranged at the upper end of the branch pipe 3, and the sintering machine bellows 6 is passed through the upper end of the branch pipe 3 and the upper cut-off valve 5 is arranged outside the sintering machine bellows 6. Symmetrically arranged branch pipe hanging parts 4 are arranged on the outer periphery of the upper middle part of the branch pipe 3. A pipe 9 is arranged on the sintering machine bellows 6, and the pipe 9 is sleeved on the upper end of the branch pipe exposed from the sintering machine bellows. Pipeline support hanging points 8 are symmetrically arranged in the pipe 9, and first electric hanging slings are respectively installed on the pipe support hanging points 8, and the first electric hanging slings correspond to the branch pipe hanging parts 4, and the hooks of the first electric hanging slings are respectively hooked with corresponding branch pipe hanging parts 4. A second electric lifting sling 10 is also provided in the sintering machine wind box 6 , and a hook of the second electric lifting sling 10 is hooked with a branch pipe lifting member 4 .

[0014] A compensator 7 is sleeved on the branch pipe 3, and the compensator 7 is arranged above the upper cut-off valve 5. The compensator shrinks the branch pipe to ensure the clearance for replacing the branch pipe.

[0015] Carry out preventive inspections in advance to determine the wear status of the branch pipe. When a large area of ​​the wear-resistant material layer inside the branch pipe falls off, it is necessary to start preparations for branch pipe replacement, because generally the branch pipe can be used for about one year after the resistant material falls off.

[0016] During the daily maintenance period, pipes and pipe support suspension points are set on the branch pipes that need to be replaced. During the scheduled maintenance period, an upper cut-off valve and a lower cut-off valve are respectively installed at the upper and lower ends of the branch pipe. The upper cut-off valve and the lower cut-off valve have good sealing performance and compressive capacity.

[0017] After installing the upper cut-off valve and the lower cut-off valve on the branch pipes that need to be replaced, the daily maintenance plan can be arranged, and the branch pipe replacement work can be gradually carried out during the daily maintenance time.

[0018] The method for online replacement of branch pipes includes the following steps:

[0019] 1) Hang the first electric sling on the pipe support suspension point of the branch pipe that needs to be replaced;

[0020] 2) Close the upper cut-off valve and the lower cut-off valve to cut off the air pressure. After preliminary testing, using this method for a single branch pipe will cause a slight decrease in the overall air volume and production capacity of the sintering machine, but it can still ensure a good production state;

[0021] 3) Install a branch pipe lifting member in the middle and upper part of the branch pipe to be replaced, and then hang the second electric sling or cooperate with a steam crane to start the preparation before lifting;

[0022] 4) Remove the lower flange of the upper cut-off valve and the upper flange of the lower cut-off valve, and then contract the compensator to ensure the gap for branch pipe replacement;

[0023] 5) The second electric sling drives the branch pipe to be replaced to start slowly moving horizontally, and the first electric sling drives the branch pipe to be replaced to slowly lower until the entire branch pipe to be replaced is separated from its original position, and then it is lifted and transported to the stacking point;

[0024] 6) After installing a branch pipe lifting member in the middle and upper part of the branch pipe to be installed, lift the branch pipe to be installed to the installation opening. Use the first electric sling to pull the upper end of the branch pipe to be installed to the installation position, and the second electric sling slowly lowers the branch pipe to be installed until the branch pipe to be installed is completely perpendicular to the installation point;

[0025] 7) Connect and fix the lower flange of the upper cut-off valve with the upper end of the branch pipe to be installed;

[0026] 8) After the connection is completed, gradually loosen the compensator, and at the same time lower the branch pipe to be installed through the first electric sling to ensure that the lower end of the branch pipe to be installed is in place for connection with the upper flange of the lower cut-off valve;

[0027] 9) After all the connections are tightened, open the upper cut-off valve and the lower cut-off valve, and the replacement work of a single branch pipe can be completed. Then, gradually complete the replacement work of other branch pipes according to the plan requirements.

[0028] When the branch pipe is deflated, closing the upper cut-off valve and the lower cut-off valve on the corresponding branch pipe can still ensure stable sintering production. Through the cooperation of the first electric lifting sling and the second electric lifting sling, the branch pipe can be replaced quickly and effectively online.

[0029] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. An on-line replacement device for a sintering main flue branch pipe, characterized in that: It includes a sintering machine wind box, in which a large flue duct body arranged horizontally is provided. A number of branch pipes arranged at intervals are provided on the large flue duct body. A lower cut-off valve is arranged at the lower end of the branch pipe, and the lower cut-off valve is arranged inside the large flue duct body. An upper cut-off valve is arranged at the upper end of the branch pipe, and the upper end of the upper cut-off valve penetrates through the sintering machine wind box and the upper cut-off valve is arranged outside the sintering machine wind box. A branch pipe lifting member is arranged on the outer periphery of the branch pipe; A pipe is provided on the sintering machine wind box, the pipe is sleeved on the upper end of the branch pipe, and pipe support hanging points are symmetrically arranged in the pipe. First electric sling tools are respectively installed on the pipe support hanging points, and the hooks of the first electric sling tools respectively hook the branch pipe lifting members.

2. The on-line replacement device for sintering main flue branch pipes according to claim 1, characterized in that: A compensator is also provided, the compensator is sleeved on the branch pipe, and the compensator is arranged above the upper cut-off valve.

3. The on-line replacement device for sintering flue main pipe branch according to claim 1, wherein: A second electric sling tool is also provided in the sintering machine wind box, and the hook of the second electric sling tool hooks the branch pipe lifting member.

4. The on-line replacement device for the sintering main flue branch pipe according to claim 1, characterized in that: When replacing the branch pipe, both the upper cut-off valve and the lower cut-off valve are in a closed state.

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