Local sand raking overhauling device for air separation cold box
By designing a local sand removal maintenance device for air-separated cold box, the problem of waste of manpower and resources during air-separated cold box maintenance is solved, and the efficiency of maintenance and resource conservation is achieved.
Patent Information
- Application Number
- CN202420532390.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-03-19
AI Technical Summary
During the use of the air-separated cold box, the valve core of the valve core of the insulation box is prone to fall off, and the internal pipelines will leak, which requires maintenance. However, due to the height of the equipment and the existence of internal pearlescent sand, the existing methods require a lot of manpower and resources, resulting in a long maintenance cycle and a waste of resources.
Design a local sand removal maintenance device for empty cold box with simple structure, reliable work and simple operation, including door frame, manhole door, longitudinal beam, sand discharge pipe, movable joints, columns and seals. The internal pearlescent sand is emptied through the sand discharge pipe to form a temporary maintenance space for partial maintenance.
It reduces the number of maintenance personnel, reduces labor costs, shortens the equipment maintenance cycle, reduces material consumption, and achieves the efficiency and resource conservation of local sand removal maintenance.
Smart Images
Figure CN222799424U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metallurgical equipment, and further belongs to the technical field of deep-cold air separation equipment, and specifically relates to a local sand-stripping and repairing device for an air separation cold box which has the advantages of simple structure, reliable operation and easy operation. Background Art
[0002] The air separation cold box is the core part of the air separation equipment (ASU), and its function is to perform low-temperature separation and separate different gas components from the air. It uses the principles of low-temperature physics and molecular sieve technology, based on the difference in boiling points of different components in the gas mixture, to achieve gas separation through appropriate cooling. The air separation cold box consists of an insulation box, a plate-fin heat exchanger, a compression system, a precooling system and a purification system, an expansion refrigeration system, a distillation tower system, a product delivery system and a liquid pump system, and a product compression system. The inside of the insulation box is used to place the plate-fin heat exchanger and other key equipment. Its function is to maintain the internal low-temperature environment and reduce heat loss.
[0003] During the use of the air-separation cold box, the valve core inside the insulation box is prone to fall off due to long-term use, and the internal pipes will leak, etc., which requires maintenance. The air-separation cold box is generally about 60m high and is filled with pearl sand. When repairing local valves or pipelines, the internal pearl sand needs to be emptied before the relevant maintenance work can be carried out. At present, there are two methods for emptying the pearl sand: pneumatic conveying and extracting it to a fixed storage point and manually removing the sand and bagging it for storage. However, in actual maintenance operations, due to limited conditions, most of the sand is removed manually. Each sand removal work requires a lot of manpower and a long cycle; for the parts that need to be repaired and replaced locally, if the entire air-separation cold box is sanded, it will also cause a huge waste of resources. To this end, the research and development of a local sand removal and maintenance device for air-separation cold boxes with a simple structure, reliable operation, and easy operation is the key to solving this problem. Utility Model Content
[0004] The utility model aims to provide a local sand stripping and repairing device for an air separation cold box which has the advantages of simple structure, reliable operation and easy operation.
[0005] The purpose of the utility model is achieved in this way, including a door frame, a manhole door, a side longitudinal beam, a bottom longitudinal beam, a sand discharge pipe, a top longitudinal beam, a movable joint, a column and a seal, wherein the door frame is arranged on the outer wall of the air separation cold box; the manhole door is arranged in the middle of the door frame; the sand discharge pipe is arranged at the lower part of the door frame; the side longitudinal beams are arranged on both sides of the door frame facing the inner direction of the air separation cold box; the bottom of the door frame is arranged with a bottom longitudinal beam facing the inner direction of the air separation cold box; the top longitudinal beam is arranged on the top of the door frame facing the inner direction of the air separation cold box; the column is arranged below the inner end of the top longitudinal beam; the top longitudinal beam and the column are connected by a movable joint; the seal is arranged in the gap between the side longitudinal beam, the bottom longitudinal beam, the top longitudinal beam and the column.
[0006] The utility model is composed of a door frame, a manhole door, a side longitudinal beam, a bottom longitudinal beam, a sand discharge pipe, a top longitudinal beam, a movable joint, a column and a sealing member; the door frame and the manhole door are arranged according to the faulty equipment area, and a temporary maintenance work space is formed together with the side longitudinal beam, the bottom longitudinal beam, the top longitudinal beam, the column and the sealing member; the pearlescent sand in the temporary maintenance work space is emptied through the sand discharge pipe, and then the faulty equipment is repaired; after the maintenance is completed, part of the pearlescent sand is backfilled, the local sand removal maintenance device is removed, and the manhole door is closed.
[0007] The utility model adopts the method of local sand scraping and maintenance to carry out equipment maintenance, which reduces the number of maintenance personnel and can greatly reduce labor costs; at the same time, due to the reduction in workload, it can greatly shorten the equipment maintenance cycle and reduce material consumption.
[0008] The utility model has the advantages of simple structure, reliable operation and convenient operation, and can perform local sand stripping and maintenance on the air separation cold box. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0010] Figure 2 It is a schematic diagram of the door frame, side longitudinal beams and bottom longitudinal beams of the utility model;
[0011] Figure 3 It is a schematic diagram of the top longitudinal beam, movable joint and column of the utility model;
[0012] Figure 4 It is a schematic diagram of the working state of the utility model.
[0013] In the figure: 1-door frame, 2-manhole door, 3-side longitudinal beam, 4-bottom longitudinal beam, 5-sand discharge pipe, 6-top longitudinal beam, 7-movable joint, 8-column, 9-seal, 10-equipment to be repaired, 11-air separation cold box, 12-outer wall of air separation cold box, 13-pearlescent sand. DETAILED DESCRIPTION
[0014] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes made based on the teachings of the present invention fall within the protection scope of the present invention.
[0015] like Figures 1 to 4 As shown, the utility model includes a door frame 1, a manhole door 2, a side longitudinal beam 3, a bottom longitudinal beam 4, a sand discharge pipe 5, a top longitudinal beam 6, a movable joint 7, a column 8 and a sealing member 9, wherein the door frame 1 is arranged on the outer wall 12 of the air separation cold box; the manhole door 2 is arranged in the middle of the door frame 1; the sand discharge pipe 5 is arranged at the lower part of the door frame 1; the side longitudinal beams 3 are arranged on both sides of the door frame 1 facing the inner direction of the air separation cold box 11; the bottom of the door frame 1 is arranged with a bottom longitudinal beam 4 facing the inner direction of the air separation cold box 11; the top longitudinal beam 6 is arranged on the top of the door frame 1 facing the inner direction of the air separation cold box 11; the column 8 is arranged below the inner end of the top longitudinal beam 6; the movable joint 7 is passed between the top longitudinal beam 6 and the column 8; the sealing member 9 is arranged at the gap between the side longitudinal beam 3, the bottom longitudinal beam 4, the top longitudinal beam 6 and the column 8.
[0016] The door frame 1 is welded to the outer wall 12 of the air separation cold box.
[0017] The outer ends of the side longitudinal beams 3 are connected in cooperation with the square holes on the door frame 1 .
[0018] The outer end of the bottom longitudinal beam 4 is connected to the square hole on the door frame 1 in a matching manner.
[0019] The outer end of the top longitudinal beam 6 is connected to the square hole on the door frame 1 in a matching manner.
[0020] The height of the column 8 is consistent with the height between the bottom longitudinal beam 4 and the top longitudinal beam 6.
[0021] The side longitudinal beam 3 is made of angle steel and has a square cross section.
[0022] The bottom longitudinal beam 4 is made of angle steel and has a square cross section.
[0023] The top longitudinal beam 6 is made of angle steel and has a square cross section.
[0024] The column 8 is made of angle steel and has a square cross section.
[0025] The working principle and working process of this utility model:
[0026] The utility model is composed of a door frame 1, a manhole door 2, a side longitudinal beam 3, a bottom longitudinal beam 4, a sand discharge pipe 5, a top longitudinal beam 6, a movable joint 7, a column 8 and a sealing member 9; the door frame 1 and the manhole door 2 are arranged according to the faulty equipment area, and together with the side longitudinal beam 3, the bottom longitudinal beam 4, the top longitudinal beam 6, the column 8 and the sealing member 9, a temporary maintenance work space is formed; the pearlescent sand 13 in the temporary maintenance work space is emptied through the sand discharge pipe 5, and then the faulty equipment is repaired; after the maintenance is completed, part of the pearlescent sand 13 is backfilled, the local sand removal maintenance device is removed, and the manhole door 2 is closed.
Claims
1. A local sand removal and maintenance device for an air separation cold box, comprising a door frame (1), a manhole door (2), a side longitudinal beam (3), a bottom longitudinal beam (4), a sand discharge pipe (5), a top longitudinal beam (6), a movable joint (7), a column (8) and a sealing member (9), wherein: The door frame (1) is arranged on the outer wall (12) of the air separation cold box; a manhole door (2) is arranged in the middle of the door frame (1); a sand discharge pipe (5) is arranged at the lower part of the door frame (1); side longitudinal beams (3) are arranged on both sides of the door frame (1) facing the interior of the air separation cold box (11); a bottom longitudinal beam (4) is arranged at the bottom of the door frame (1) facing the interior of the air separation cold box (11); a top longitudinal beam (6) is arranged at the top of the door frame (1) facing the interior of the air separation cold box (11); a column (8) is arranged below the inner end of the top longitudinal beam (6); a movable joint (7) is provided between the top longitudinal beam (6) and the column (8); and the sealing member (9) is arranged at the gap between the side longitudinal beam (3), the bottom longitudinal beam (4), the top longitudinal beam (6) and the column (8).
2. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The door frame (1) is welded to the outer wall (12) of the air separation cold box.
3. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The outer ends of the side longitudinal beams (3) are connected in cooperation with the square holes on the door frame (1).
4. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The outer end of the bottom longitudinal beam (4) is connected to the square hole on the door frame (1).
5. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The outer end of the top longitudinal beam (6) is connected to the square hole on the door frame (1).
6. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The height of the upright column (8) is consistent with the height between the bottom longitudinal beam (4) and the top longitudinal beam (6).
7. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The side longitudinal beam (3) is made of angle steel and has a square cross section.
8. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The bottom longitudinal beam (4) is made of angle steel and has a square cross section.
9. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The top longitudinal beam (6) is made of angle steel and has a square cross section.
10. The local sand stripping and maintenance device for air separation cold box according to claim 1 is characterized by: The upright column (8) is made of angle steel and has a square cross section.