A thermal dryer for papermaking

Abstract

The utility model relates to a kind of oil hot type drying cylinder for papermaking, including the oil pipe body formed by the length direction coiling of hot oil pipe, the oil pipe cavity is formed in the oil pipe body surrounded by hot oil pipe, there is interval between adjacent hot oil pipe section, interval is communicated with oil pipe cavity;Hot oil pipe is formed oil pipe import and oil pipe export respectively at the both ends of oil pipe body;The outside of oil pipe body is fixedly connected shell, the inner wall of shell is in contact with hot oil pipe, multiple air holes are provided on shell, the position of air hole corresponds with the interval of hot oil pipe.The utility model sets up coiled hot oil pipe to heat shell, to realize the basic function of hot oil drying.Lax coiled pipe section is formed interval communicated with inner cavity, cooperate the air hole opened on shell, form the escape path of roller internal heat, fill air in roller by air inlet head, the heat accumulated in interior is dissipated from surface, so that this part of heat is not lost, can be hot gas mode to wet paper jet drying.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment, and in particular to an oil-heated drying cylinder for papermaking. Background Technology

[0002] The papermaking process involves a step of drying wet paper, which typically uses a hot oil-heated drying cylinder or hot roller to dry or iron the wet paper. Existing drying cylinders generally fall into two types. One type has coiled hot oil pipes inside the roller, where hot oil flows and circulates, heating the roller surface. Because the hot oil pipes are coiled, heat accumulates inside the structure and within the roller cavity. While this keeps the hot oil warm during operation, this heat is lost after the process ends. The second type involves filling the roller entirely with hot oil. While this allows for the draining of the hot oil to prevent heat loss after operation, it increases the demand for hot oil during operation, adds weight to the roller, and consumes more electricity to drive its rotation. Utility Model Content

[0003] The purpose of this application is to provide an oil-heated drying cylinder for papermaking, which aims to solve the problems existing in the prior art.

[0004] This application provides an oil-heated drying cylinder for papermaking, comprising an oil pipe body formed by hot oil pipes coiled along its length, an inner cavity formed inside the oil pipe body, and intervals between adjacent hot oil pipe segments communicating with the inner cavity of the oil pipe; an oil pipe inlet and an oil pipe outlet are respectively formed at both ends of the oil pipe body; an outer shell is fixedly connected to the outside of the oil pipe body, the inner wall of the outer shell is in contact with the hot oil pipes, and multiple vent holes are provided on the outer shell, the positions of which correspond to the intervals of the hot oil pipes;

[0005] The outer shell has shell tube sections at both ends corresponding to the oil pipe inlet and oil pipe outlet, respectively. There is a gap between the oil pipe inlet and the corresponding shell tube section to form an air passage. An air inlet communicating with the air passage is opened on the corresponding shell tube section. An air inlet head is rotatably connected to the shell tube section outside the air inlet. An air pumping pipe communicating with the air inlet is fixed on the air inlet head.

[0006] Furthermore, the oil pipe outlet is sealed to the corresponding shell section, thereby sealing the inner cavity of the oil pipe on the oil pipe outlet side.

[0007] Furthermore, the air intake head is connected to the corresponding shell tube section by a bearing, and the air intake head has an internal cavity through which the air pumping pipe is connected to the air intake.

[0008] Furthermore, the end of the shell section is fixedly connected to an end cap, the shell section is fixed to the oil pipe inlet through the end cap, and the gas passage is sealed through the end cap.

[0009] The beneficial effects of this utility model are as follows: This utility model uses a coiled hot oil pipe to heat the outer shell, thereby achieving the basic function of hot oil drying. In addition, loosening the coiled pipe section to form a gap communicating with the inner cavity, combined with the air vents on the outer shell, forms a path for the heat inside the roller to dissipate. Air is injected into the roller through the air inlet head, dissipating the heat accumulated inside from the surface, ensuring that this heat is not wasted, and allowing for hot air drying of the wet paper.

[0010] Compared to existing technologies, using hot oil pipes to transport hot oil reduces the amount of hot oil required during operation, lowers the overall weight of the roll, and thus saves energy. On the other hand, the heat accumulated inside the roll can be released onto the wet paper through the air vents, improving heat utilization. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the external structure of this utility model.

[0013] In the picture:

[0014] 1. Hot oil pipe; 2. Oil pipe inner cavity; 3. Oil pipe inlet; 4. Oil pipe outlet; 5. Outer shell; 6. Vent hole; 7. Shell and pipe section; 8. Air passage; 9. Air inlet; 10. Air inlet head; 11. Air pump pipe; 12. End. Detailed Implementation

[0015] 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.

[0016] like Figure 1 and Figure 2The illustrated oil-heated drying cylinder for papermaking includes an oil pipe body formed by coiling hot oil pipes 1 along its length. Due to the reciprocating coiling of the hot oil pipes 1, an inner cavity 2 is formed inside the oil pipe body. Adjacent hot oil pipe segments 1 are spaced apart, and the spacers communicate with the inner cavity 2. At both ends of the oil pipe body, the hot oil pipes 1 form an oil pipe inlet 3 and an oil pipe outlet 4, respectively. Hot oil flows through the oil pipe inlet 3 and exits from the oil pipe outlet 4, allowing the oil pipe body to dissipate heat for drying wet paper. A shell 5 is fixedly connected to the outside of the oil pipe body. The inner wall of the shell 5 contacts the hot oil pipes 1, allowing heat to be transferred to the shell 5. The smooth surface of the shell 5 provides an ironing effect for the paper sample. The materials of the hot oil pipes 1 and the shell 5 are the same as in existing technologies, both using excellent thermal conductivity materials. Multiple vent holes 6 are provided on the outer casing 5. The positions of the vent holes 6 correspond to the intervals of the hot oil pipes 1, so that the vent holes 6 are connected to the inner cavity 2 of the oil pipes. The diameter of the vent holes 6 is small, so that they will not form indentations on the paper.

[0017] The outer casing 5 has casing sections 7 at both ends corresponding to the oil pipe inlet 3 and the oil pipe outlet 4, respectively, which cover the outside of the oil pipe inlet 3 and the oil pipe outlet 4. An air passage 8 is formed between the oil pipe inlet 3 and the corresponding casing section 7. An air inlet 9 communicating with the air passage 8 is provided on the corresponding casing section 7. An air inlet head 10 is rotatably connected to the casing section 7 outside the air inlet 9. The air inlet head 10 is connected to the corresponding casing section 7 via a bearing. The air inlet head 10 has an internal cavity through which an air pump pipe 11 communicates with the air inlet 9. An air pump pipe 11 communicating with the air inlet 9 is fixed on the air inlet head 10 and connected to an external air source device.

[0018] The air inlet head 10 is fixed by an external clamping structure, keeping it stationary when the drying cylinder rotates. Air is pumped into the air inlet head 10 through the air inlet pipe 11. The gas enters the air passage 8 through the air inlet 9 and then into the inner cavity 2 of the oil pipe. As the continuous pumping increases the air pressure in the inner cavity 2 of the oil pipe, the gas can flow out through the vent hole 6, carrying away the heat accumulated in the inner cavity 2 of the oil pipe during the process. The seal between the air inlet head 10 and the shell section 7 is achieved through a bearing-integrated seal.

[0019] The tubing outlet 4 is sealed to the corresponding shell and tube section 7, sealing the tubing cavity 2 at the tubing outlet 4 side, allowing gas to escape only through the vent 6. An end cap 12 is fixedly connected to the end of the shell and tube section 7, which is then fixed to the tubing inlet 3, and the vent passage 8 is sealed via the end cap 12. Similarly, at the tubing outlet 4, the end cap 12 also connects the shell and tube section 7 to the tubing outlet 4 and seals the tubing cavity 2.

[0020] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

Claims

1. A papermaking oil-heated drying cylinder, characterized in that, The system includes an oil pipe body formed by coiling hot oil pipes along its length. The interior of the oil pipe body, enclosed by the hot oil pipes, forms an oil pipe cavity. There are gaps between adjacent hot oil pipe segments, and the gaps communicate with the oil pipe cavity. At both ends of the oil pipe body, the hot oil pipes form an oil pipe inlet and an oil pipe outlet, respectively. An outer shell is fixedly connected to the outside of the oil pipe body. The inner wall of the outer shell is in contact with the hot oil pipes. The outer shell has multiple vent holes, and the positions of the vent holes correspond to the gaps in the hot oil pipes. The outer shell has shell tube sections at both ends corresponding to the oil pipe inlet and oil pipe outlet, respectively. There is a gap between the oil pipe inlet and the corresponding shell tube section to form an air passage. An air inlet communicating with the air passage is opened on the corresponding shell tube section. An air inlet head is rotatably connected to the shell tube section outside the air inlet. An air pumping pipe communicating with the air inlet is fixed on the air inlet head.

2. The oil-heated drying cylinder for papermaking according to claim 1, characterized in that, The oil pipe outlet is sealed to the corresponding shell section, so that the inner cavity of the oil pipe is sealed on the oil pipe outlet side.

3. The oil-heated drying cylinder for papermaking according to claim 1, characterized in that, The air intake head is connected to the corresponding shell tube section by a bearing. The air intake head has a cavity inside, through which the air pumping pipe is connected to the air intake.

4. The oil-heated drying cylinder for papermaking according to claim 1, characterized in that, The shell and tube section is fixedly connected to an end cap, which is used to fix the shell and tube section to the oil pipe inlet. The gas passage is sealed by the end cap.

Images