A papermaking drying roll heat exchange pipeline with waste heat recovery
By installing filter plates, positioning columns, and locking nuts in the heat exchange pipes of the paper drying rolls for filtration, and filling the heat exchange pipes with ceramic cores, the problem of waste heat in the heat exchange pipes is solved, achieving efficient recovery of waste heat and heat preservation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI ZHIHU YUNSHANG IND CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-06-23
AI Technical Summary
Heat exchange tubes tend to retain residual heat during operation, leading to the waste of waste heat energy.
A heat exchange pipe for paper drying rollers with residual heat recovery was designed. The system uses a filter plate, positioning column and locking nut at the connection between the connecting seat and the connecting pipe for filtration, and fills the heat exchange pipe with a ceramic core to improve the heat preservation effect. At the same time, the connection is sealed with connecting bolts and gaskets.
It improves the waste heat recovery capacity, enhances the insulation and connection capacity of heat exchange pipes, reduces waste heat loss, and achieves efficient waste heat recovery.
Smart Images
Figure CN224395324U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchange pipeline technology, specifically a heat exchange pipeline for paper drying rollers with residual heat recovery. Background Technology
[0002] Paper drying rolls are components used to dry paper in papermaking machines and are key equipment in the drying section. Their core function is to reduce the moisture content of the paper to a acceptable range using hot air drying, ensuring the quality of subsequent processing. Drying rolls typically use a metal base with a surface coated with materials such as polyurethane or nitrile rubber, and achieve paper dehydration through hot air circulation.
[0003] The heat exchange pipes of the paper drying rollers mainly refer to devices used for heat transfer. The heat exchange pipes transfer heat to the fluid, and then the heat is carried to the target location through the circulation of the fluid, so that the fluid temperature reaches the expected level. However, when the heat exchange pipes are working, residual heat is likely to exist in the pipes, which can easily generate waste heat energy. Utility Model Content
[0004] The purpose of this utility model is to provide a heat exchange pipe for paper drying rollers with residual heat recovery, so as to solve the problem mentioned in the background art that residual heat is easily present in the pipe during operation, which easily generates waste heat energy.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat exchange pipe for a paper drying roller with residual heat recovery, comprising a heat exchange pipe and a residual heat recovery device. A connecting seat is installed on the right side of the top of the heat exchange pipe. A connecting pipe is connected to one side of the bottom of the residual heat recovery device. The tail end of the connecting pipe is connected to the interior of the connecting seat. Mounting plates are fixed on both sides of the inner wall of the connecting seat. A positioning post is fixed on the top of the mounting plate. A filter plate is mounted on the top of the mounting plate. A locking nut is connected to the upper part of the positioning post. Limiting plates are fixed on both sides of the inner wall of the connecting seat above the filter plate. A connecting bolt is connected between the connecting seat and the connecting pipe. A first gasket is mounted on the inner wall of the connecting seat.
[0006] As a further technical solution of this utility model, the filter plate has reserved holes on both sides, and the positioning post corresponds to the position of the reserved hole.
[0007] As a further technical solution of this utility model, the mounting plate is symmetrically distributed about the central axis of the connecting seat, and the limiting plate is symmetrically distributed about the central axis of the connecting seat.
[0008] As a further technical solution of this utility model, an external threaded end is fixed at the upper position of the outer side of the positioning post, and a threaded connection is formed between the external threaded end and the locking nut.
[0009] As a further technical solution of this utility model, internal thread grooves are opened on both sides of the heat exchange tube, and a connector is connected to the position of the internal thread groove. A second gasket is fixed to the outside of the side of the connector.
[0010] As a further technical solution of this utility model, the internal thread groove and the connector form a threaded connection, the side of the connector is equipped with a tube sheet, and the interior of the heat exchange tube is filled with a ceramic core.
[0011] Compared with the prior art, the beneficial effects of this utility model are: the heat exchange pipe of the paper drying roller with residual heat recovery not only improves the residual heat recovery capacity, but also improves the heat preservation capacity and connection capacity of the heat exchange pipe.
[0012] (1) By assembling the connecting seat at the top of the heat exchange tube and connecting the tube to the inside of the connecting seat, the bottom of the connecting tube is supported and limited by the limiting plate. At the same time, the mounting plate is fixed at the lower position on both sides of the inner wall of the connecting seat in advance, the positioning column is fixed at the top position of the mounting plate, the filter plate is assembled at the upper position of the mounting plate, and then the locking nut is used to lock the position at the external thread end of the positioning column. In this way, the filter can be filtered first during waste heat recovery. Then the connecting bolts are used to complete the connection and fixation of the connecting tube and the connecting seat, and the connection is sealed with the first gasket. In this way, the waste heat recovery device can be used to recover the waste heat, which improves the waste heat recovery capacity.
[0013] (2) By filling the middle position of the heat exchange tube with a ceramic core, the ceramic core is located in the center of the heat exchange tube. Thus, the heat exchange tube plays a certain heat preservation role under the action of the ceramic core. Therefore, during the operation, not only is the loss of residual heat reduced, but the heat preservation effect during heat exchange is also improved.
[0014] (3) By opening internal thread grooves in the inner walls on both sides of the heat exchange tube, the connection and assembly of the connector can be completed at the position of the internal thread groove. The tube sheet on this side can be assembled accordingly. A second gasket is fixedly installed on the outside of the connector side. The second gasket is accommodated in the heat exchange tube, thereby improving the connection and assembly capability and the sealing capability of the connection. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0016] Figure 2 This is a side view cross-sectional structural diagram of the heat exchange tube body of this utility model;
[0017] Figure 3 This is a front view cross-sectional structural diagram of the connector of this utility model;
[0018] Figure 4 For the present utility model Figure 1 Enlarged cross-sectional view of point A in the middle.
[0019] In the diagram: 1. Heat exchange tube; 2. Tube sheet; 3. Waste heat recovery unit; 4. Connecting tube; 5. Connecting seat; 6. Ceramic inner core; 7. Mounting plate; 8. Filter plate; 9. Positioning column; 10. Locking nut; 11. Connecting bolt; 12. First gasket; 13. Limiting plate; 14. Internal thread groove; 15. Second gasket; 16. Connector. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-4 An embodiment of this utility model provides a heat exchange pipe for a paper drying roller with residual heat recovery, including a heat exchange pipe 1 and a residual heat recovery device 3. A connecting seat 5 is installed on the right side of the top of the heat exchange pipe 1. A connecting pipe 4 is connected to one side of the bottom of the residual heat recovery device 3. The tail end of the connecting pipe 4 is connected to the inside of the connecting seat 5. Mounting plates 7 are fixed on both sides of the inner wall of the connecting seat 5. A positioning post 9 is fixed on the top of the mounting plate 7. A filter plate 8 is mounted on the top of the mounting plate 7. A locking nut 10 is connected to the upper part of the positioning post 9. Limiting plates 13 are fixed on both sides of the inner wall of the connecting seat 5 above the filter plate 8. A connecting bolt 11 is connected between the connecting seat 5 and the connecting pipe 4. A first gasket 12 is mounted on the inner wall of the connecting seat 5.
[0022] As a further technical solution of this utility model, the filter plate 8 has reserved holes on both sides, and the positioning post 9 corresponds to the position of the reserved holes.
[0023] As a further technical solution of this utility model, the mounting plate 7 is symmetrically distributed about the central axis of the connecting seat 5, and the limiting plate 13 is symmetrically distributed about the central axis of the connecting seat 5.
[0024] As a further technical solution of this utility model, an external threaded end is fixed at the upper position of the positioning post 9, and a threaded connection is formed between the external threaded end and the locking nut 10.
[0025] As a further technical solution of this utility model, internal threaded grooves 14 are provided on both sides of the heat exchange tube 1, and connectors 16 are connected to the positions of the internal threaded grooves 14. A second gasket 15 is fixed to the outside of the side of the connector 16.
[0026] As a further technical solution of this utility model, a threaded connection is formed between the internal thread groove 14 and the connector 16, a tube sheet 2 is assembled on the side of the connector 16, and a ceramic inner core 6 is filled inside the heat exchange tube 1.
[0027] The interior of the heat exchange tube 1 is filled with a ceramic core 6, which serves the purpose of heat preservation. The ceramic core 6 can be replaced with other insulation materials, such as glass wool, as needed.
[0028] Working principle: First, during operation, internal threaded grooves 14 are opened in the inner walls on both sides of the heat exchange tube 1. The connector 16 is connected and assembled at the position of the internal threaded groove 14, so that the tube plate 2 on the side can be assembled accordingly. The mounting plate 7 is fixed in advance at the lower position on both sides of the inner wall of the connecting seat 5. The positioning post 9 is fixed at the top position of the mounting plate 7. The filter plate 8 is assembled at the upper position of the mounting plate 7. Then, the locking nut 10 is used to lock the position at the external thread end of the positioning post 9. In this way, the filter can be filtered first during waste heat recovery. Then, the connecting bolt 11 is used to complete the connection and fixation of the connecting tube 4 and the connecting seat 5. The connection is sealed with the first gasket 12. In this way, the waste heat recovery device 3 can be used to recover the waste heat.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A heat exchange pipe for a paper drying roll with waste heat recovery, comprising a heat exchange pipe (1) and a waste heat recovery unit (3), characterized in that: A connecting seat (5) is installed on the right side of the top of the heat exchange tube (1). A connecting pipe (4) is connected to one side of the bottom of the waste heat recovery unit (3). The tail end of the connecting pipe (4) is connected to the inside of the connecting seat (5). Mounting plates (7) are fixed on both sides of the inner wall of the connecting seat (5). A positioning post (9) is fixed on the top of the mounting plate (7). A filter plate (8) is mounted on the top of the mounting plate (7). A locking nut (10) is connected to the upper part of the positioning post (9). Limiting plates (13) are fixed on both sides of the inner wall of the connecting seat (5) above the filter plate (8). A connecting bolt (11) is connected between the connecting seat (5) and the connecting pipe (4). A first gasket (12) is mounted on the inner wall of the connecting seat (5).
2. The heat exchange pipe for paper drying rolls with residual heat recovery according to claim 1, characterized in that: The filter plate (8) has reserved holes on both sides, and the positioning post (9) corresponds to the position of the reserved hole.
3. The heat exchange pipe for paper drying rolls with residual heat recovery according to claim 1, characterized in that: The mounting plate (7) is symmetrically distributed about the central axis of the connecting seat (5), and the limiting plate (13) is symmetrically distributed about the central axis of the connecting seat (5).
4. The heat exchange pipe for paper drying rolls with residual heat recovery according to claim 1, characterized in that: The positioning post (9) has an external threaded end fixed at the upper part of its exterior, and the external threaded end forms a threaded connection with the locking nut (10).
5. The heat exchange pipe for paper drying rolls with residual heat recovery according to claim 1, characterized in that: The heat exchange tube (1) has internal threaded grooves (14) on both sides, and a connector (16) is connected to the internal threaded groove (14). A second gasket (15) is fixed to the outside of the side of the connector (16).
6. The heat exchange pipe for paper drying rolls with residual heat recovery according to claim 5, characterized in that: The internal threaded groove (14) forms a threaded connection with the connector (16), the side of the connector (16) is fitted with a tube sheet (2), and the interior of the heat exchange tube (1) is filled with a ceramic core (6).