Circulating electric heating roller in runner
By designing an internally circulating electrically heated roll, the problem of uneven roll surface temperature was solved, achieving temperature uniformity and high-temperature precision, thereby improving rolling efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BOLUWEI MACHINERY JIANGSU CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-05-15
AI Technical Summary
Existing heated rolls have the problem of uneven roll surface temperature, especially with a large temperature difference between the roll ends and the middle area, which cannot meet the high-temperature precision requirements.
Design an internal circulation electrically heated roller. Through the structural design of inner and outer roller sleeves and spiral plates, heat transfer oil is circulated between the inner and outer channels. The rotational inertia of the roller and the spiral plate structure guide the oil flow, and the electric heating tubes are used to achieve temperature uniformity.
It improves the uniformity of roller surface temperature, reduces temperature difference, meets high-temperature precision requirements, and improves rolling efficiency and product quality.
Smart Images
Figure CN224237886U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rolling mill production technology, and in particular to an internal circulation electrically heated rolling mill. Background Technology
[0002] Heated rolls are a critical step in the metal rolling process, directly affecting rolling efficiency, product quality, and roll life. Maintaining stable and uniform temperature is essential for ensuring uniform plastic deformation of the rolled product and reducing dimensional deviations. Existing heated, internally sealed oil-filled rolls suffer from uneven roll surface temperature. Because the heat transfer oil cannot circulate internally, the temperature at the roll ends is significantly lower than that in the middle region, with a temperature difference of approximately 6-10°C, which cannot meet the requirements of applications with high temperature accuracy.
[0003] Therefore, the structure of the heated rolls needs further improvement to enhance the uniformity of the roll surface temperature. Utility Model Content
[0004] The purpose of this invention is to provide an internally circulating electrically heated roll that can improve the uniformity of roll surface temperature.
[0005] To achieve the above-mentioned utility model objectives, this utility model provides an internal circulation electric heating roll, including a shaft, an inner roll sleeve, an outer roll sleeve, an inner spiral plate, an outer spiral plate, and a heating assembly;
[0006] The shaft, the inner roller sleeve, and the outer roller sleeve are coaxially arranged. The inner roller sleeve is located between the shaft and the outer roller sleeve, and both ends of the inner roller sleeve are provided with flow ports. The inner spiral plate is located between the inner roller sleeve and the shaft, and the outer spiral plate is located between the outer roller sleeve and the inner roller sleeve. The spiral directions of the inner spiral plate and the outer spiral plate are opposite.
[0007] The heating component is located between the outer roller sleeve and the inner roller sleeve.
[0008] As a further improvement of the utility model, the number of flow ports is several, and the several flow ports are arranged in a ring array at the end of the inner roller sleeve.
[0009] As a further improvement of the utility model, temperature control probes are provided at both ends of the outer roller sleeve, and the outer roller sleeve is provided with a sensing groove, with the temperature control probes located in the sensing groove.
[0010] Furthermore, the sensing groove is arranged along the axial direction of the outer roller sleeve, and the temperature control probe is connected to the sensing groove by fasteners.
[0011] As a further improvement of the utility model, the heating component is an electric heating tube, and a plurality of the electric heating tubes are arranged in a ring array between the outer roller sleeve and the inner roller sleeve.
[0012] Furthermore, the outer spiral plate is provided with a connector, and the end of the connector is provided with a flared connector. The outer spiral plate is connected to the heating assembly through the connector.
[0013] Furthermore, the horn-shaped connector is divided into several separate connecting pieces.
[0014] This utility model discloses an internal circulation electric heating roller. By setting an inner roller sleeve and an outer roller sleeve, the flow channel of heat transfer oil is divided into an inner flow channel and an outer flow channel. The positive and negative spiral structure of the inner and outer spiral plates guides the flow of heat transfer oil. Combined with the inertia of the roller's own rotation, the heat transfer oil circulates between the inner and outer flow channels through the flow port.
[0015] The advantages of this utility model of an internally circulating electrically heated roll compared with the prior art are as follows:
[0016] (1) The rotation of the rollers drives the heat transfer oil to circulate between the inner and outer roller sleeves, thereby improving the temperature uniformity of various areas of the roller surface and solving the problem of temperature difference on the roller surface.
[0017] (2) Based on the rotation speed of the roll, different pitch spiral plates are prepared so that different spiral plates can be selectively installed according to the requirements to adjust the flow rate. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of an internal circulation electrically heated roller structure according to the present invention;
[0019] Figure 2 This is a schematic diagram of the temperature control probe's location structure.
[0020] Figure 3 This is a schematic diagram of a trumpet-shaped connector structure. Detailed Implementation
[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0022] like Figure 1 As shown, the present invention provides an internal circulation electric heating roller, comprising a shaft 1, an inner roller sleeve 2, an outer roller sleeve 3, an inner spiral plate 4, an outer spiral plate 5, and a heating assembly 6.
[0023] Shaft 1, inner roller sleeve 2, and outer roller sleeve 3 are coaxially arranged. The inner roller sleeve 2 is located between shaft 1 and outer roller sleeve 3. Both ends of the inner roller sleeve 2 are provided with flow ports 21. The inner spiral plate 4 is located between the inner roller sleeve 2 and shaft 1, and the outer spiral plate 5 is located between the outer roller sleeve 3 and inner roller sleeve 2. The spiral directions of the inner spiral plate 4 and the outer spiral plate 5 are opposite.
[0024] The heating component 6 is located between the outer roller sleeve 3 and the inner roller sleeve 2.
[0025] This utility model discloses an internal circulation electric heating roller. By setting an inner roller sleeve 2 and an outer roller sleeve 3, the flow channel of heat transfer oil is divided into an inner flow channel 7 and an outer flow channel 8. The positive and negative spiral structure of the inner spiral plate 4 and the outer spiral plate 5 guides the flow of heat transfer oil. Combined with the inertia of the roller's own rotation, the heat transfer oil circulates between the inner flow channel 7 and the outer flow channel 8 through the flow port 21.
[0026] The number of flow ports 21 is several, and the flow ports 21 are arranged in a ring array at the end of the inner roller sleeve 2. Increasing the number of flow ports 21 increases the flow rate of heat transfer oil between the inner and outer roller sleeves.
[0027] like Figure 2 As shown, temperature control probes 9 are provided at both ends of the outer roller sleeve 3. The outer roller sleeve 3 has a sensing groove 31, and the temperature control probes 9 are located in the sensing groove 31. The temperature control probes 9 are existing temperature sensing devices that can monitor the temperature at both ends of the outer roller sleeve 3 in real time, so as to know whether the temperature at both ends of the roll is too low. The sensing groove 31 is arranged along the axial direction of the outer roller sleeve 3, and the temperature control probes 9 are connected to the sensing groove 31 by fasteners 91, which allows for easy adjustment of the sensing position of the temperature control probes 9 in the sensing groove 31 as needed.
[0028] The heating component 6 can be an electric heating tube. Several electric heating tubes are arranged in a ring array between the outer roller sleeve 3 and the inner roller sleeve 2, so that the heating tubes can quickly heat the heat transfer oil in contact with them, and the heat transfer oil is heated more evenly.
[0029] like Figure 3 As shown, the outer spiral plate 5 is equipped with a connector 51, and the end of the connector 51 is provided with a trumpet-shaped connector 52. The outer spiral plate 5 is connected to the heating assembly 6 through the connector 51. During the installation process, the end of the electric heating tube will sink due to the influence of the shaft length, affecting the installation speed. Moreover, during long-term use of the roll, the electric heating tube inside the roll is subjected to external forces, and friction will occur at the connection between it and the outer spiral plate 5, causing damage to the surface of the electric heating tube and affecting its service life. The trumpet-shaped connector 52 of the outer spiral plate 5 can protect the surface of the electric heating tube to a certain extent. The inner cavity of the trumpet-shaped connector 52 provides space for the small-amplitude movement of the electric heating tube, reducing the friction between the outer wall of the electric heating tube and the connection between it and the outer spiral plate 5.
[0030] The horn-shaped connector 52 is divided into several separate connecting pieces 521. Compared with the one-piece horn-shaped connector 52, the separate connecting pieces 521 make the horn-shaped connector 52 a separate structure. Each connecting piece 521 will undergo slight deformation independently after being hit by the electric heating tube, making room for the movement of the electric heating tube and further reducing the wear on the outer wall of the electric heating tube.
[0031] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A circulating electrically heated roll with an internal flow channel, characterized in that, It includes a shaft, inner roller sleeve, outer roller sleeve, inner spiral plate, outer spiral plate, and heating components; The shaft, the inner roller sleeve, and the outer roller sleeve are coaxially arranged. The inner roller sleeve is located between the shaft and the outer roller sleeve, and both ends of the inner roller sleeve are provided with flow ports. The inner spiral plate is located between the inner roller sleeve and the shaft, and the outer spiral plate is located between the outer roller sleeve and the inner roller sleeve. The spiral directions of the inner spiral plate and the outer spiral plate are opposite. The heating component is located between the outer roller sleeve and the inner roller sleeve.
2. The internal circulation electrically heated roll as described in claim 1, characterized in that, The number of flow ports is several, and the flow ports are arranged in a circular array at the end of the inner roller sleeve.
3. The internal circulation electrically heated roll as described in claim 1, characterized in that, Temperature control probes are provided at both ends of the outer roller sleeve, and the outer roller sleeve is provided with a sensing groove, with the temperature control probes located in the sensing groove.
4. The internal circulation electrically heated roll as described in claim 3, characterized in that, The sensing groove is arranged along the axial direction of the outer roller sleeve, and the temperature control probe is connected to the sensing groove by fasteners.
5. The internal circulation electrically heated roll as described in claim 1, characterized in that, The heating component is an electric heating tube, and a plurality of the electric heating tubes are arranged in a ring array between the outer roller sleeve and the inner roller sleeve.
6. The internal circulation electrically heated roll as described in claim 5, characterized in that, The outer spiral plate is provided with a connector, and the end of the connector is provided with a flared connector. The outer spiral plate is connected to the heating assembly through the connector.
7. The internal circulation electrically heated roll as described in claim 6, characterized in that, The horn-shaped connector is divided into several separate connecting pieces.