Thermocouple temperature measuring device suitable for rotating roller
By installing ceramic tubes and high-temperature bearings inside the heating furnace wall, combined with rollers and spring thermocouples, the wear and short circuit risks of the rotating roller temperature measuring device were solved, achieving stable and accurate temperature measurement and safe control.
Patent Information
- Application Number
- CN202422713911.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-07
AI Technical Summary
In the existing technology, when using contact thermocouples to measure temperature on rotating rolls, there are problems such as large wear, poor fit, and the risk of electrical contact with the resistance band, which leads to distorted measurement values and safety hazards.
A ceramic tube is inserted into the wall of the heating furnace, and high-temperature bearings and rollers are installed. The thermocouple is in contact with the outside of the bearing and is kept in contact by a spring to avoid wear and gaps, and is isolated from the resistance band.
Stable and accurate temperature measurement on rotating rolls was achieved, reducing thermocouple wear and safety risks, and ensuring the accuracy and safety of the measurement.
Smart Images
Figure CN223551193U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roll remanufacturing, and in particular to a thermocouple temperature measuring device suitable for rotating rolls. Background Technology
[0002] In the heat treatment process of rolling mill rolls, contact thermocouples are often used for temperature measurement. Since heat-treated products are generally not finished products, their final dimensions are usually unaffected by whether they are placed horizontally or vertically. As a rolling mill roll remanufacturing manufacturer, we primarily repair finished rolling mill roll bodies. Therefore, no deformation is allowed in any part of the roll. During the heat treatment process, a roller frame is used to keep the roll constantly rotating, and temperature measurement is also performed using thermocouples. However, using contact thermocouples on rotating rolling mill rolls presents the following problems:
[0003] 1) Because the rolls are constantly rotating and the surface of the remanufactured rolls is rough and uneven, even if the thermocouples are fixed externally, they often bend and deform internally, thus failing to fit with the rolls and resulting in severely distorted measurement values.
[0004] 2) The rollers wear out during rotation, resulting in significant wear and tear on the thermocouples. The thermocouples have a short service life and significant wear, which can lead to deviations in numerical measurements.
[0005] 3) The thermocouple is located inside the furnace chamber of the heating furnace. The furnace walls consist of solid furnace walls and ceramic fiber walls. The solid furnace walls are made of pure iron and serve as the main support. The ceramic fiber walls are made of ceramic fibers and serve as insulation and heat preservation. The furnace chamber is generally equipped with multiple resistance bands, which are used for heating. If the thermocouple is bent by the rollers, there is a risk of short circuit with the resistance bands, which could cause a safety accident. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a thermocouple temperature measuring device suitable for rotating rolls, which solves the problems of large wear between thermocouples and rotating rolls, poor fit caused by gaps between thermocouples and rotating rolls, and the risk of thermocouples becoming electrically connected to the resistance band inside the furnace.
[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a thermocouple temperature measuring device suitable for rotating rollers, comprising a ceramic tube inserted laterally into a solid heating furnace wall and a ceramic fiber wall, wherein multiple resistance bands are provided in the ceramic fiber wall, the ceramic tube is not connected to the resistance bands, a bearing mounting groove is provided at one end of the ceramic tube extending out of the ceramic fiber wall, a high-temperature bearing is provided in the bearing mounting groove, a roller that rotates on the high-temperature bearing and contacts the roller, a compression spring is provided between the inside of the ceramic tube and the outside of the high-temperature bearing, a thermocouple is transversely inserted in the ceramic tube, and one end of the thermocouple contacts the outside of the high-temperature bearing.
[0008] A further improvement of this utility model is that: fixed iron plates are fixedly installed above and below the ceramic tubes on both the inner and outer sides of the solid heating furnace wall, and a first ceramic bolt that contacts the ceramic tube is vertically inserted into each of the fixed iron plates.
[0009] A further improvement of this utility model is that the fixing iron plate is fixedly installed on the solid heating furnace wall at a distance of 10mm above and below the ceramic tube.
[0010] A further improvement of this utility model is that: a second ceramic bolt is provided at one end of the ceramic tube extending out of the ceramic fiber wall, which is vertically inserted into the interior of the ceramic tube and in contact with the thermocouple.
[0011] A further improvement of this utility model is that the thermocouple is a spring thermocouple.
[0012] A further improvement of this utility model is that the roller is made of copper alloy.
[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:
[0014] This invention has a simple structure. The rotation of the rolling mill drives the contact roller to rotate. Due to the action of the spring, the contact roller is always in contact with the rolling mill. The heat is transferred to the high-temperature bearing through heat conduction. The thermocouple is in contact with the outside of the high-temperature bearing. The thermocouple itself has a telescoping function, which can also ensure constant contact with the high-temperature bearing. Therefore, the value measured by the thermocouple is the temperature of the rolling mill body, thereby controlling the heating process of the heat treatment furnace. This invention solves the problems of large wear between the thermocouple and the rotating rolling mill, the problem of gaps easily generated between the thermocouple and the rotating rolling mill causing poor fit, and the risk of the thermocouple being electrically connected to the resistance band inside the furnace. Attached Figure Description
[0015] Figure 1 This is a front view of the overall structure of this utility model;
[0016] Figure 2 This is a side view of the overall structure of this utility model;
[0017] Among them, 1. solid heating furnace wall, 2. ceramic fiber wall, 3. ceramic tube, 4. high temperature bearing, 5. roller, 6. compression spring, 7. thermocouple, 8. fixing iron plate, 9. first ceramic bolt, 10. second ceramic bolt, 11. resistance band. Detailed Implementation
[0018] The present invention will be further described in detail below with reference to embodiments:
[0019] like Figures 1 to 2 As shown, a thermocouple temperature measuring device suitable for rotating rollers includes a ceramic tube 3 inserted laterally into a solid heating furnace wall 1 and a ceramic fiber wall 2. The ceramic tube has a custom structure and mainly serves to insulate, support, and isolate the thermocouple readings from the influence of thermal radiation from the resistance band 11. Holes are drilled in the solid heating furnace wall 1 and the ceramic fiber wall 2 at positions avoiding the resistance band 11. The hole diameter is the same as the diameter of the ceramic tube 3. After the ceramic tube 3 is inserted, it can prevent the ceramic tube 3 from shifting, and at the same time, the ceramic tube 3 is not connected to the resistance band 11 after insertion.
[0020] A bearing mounting groove is provided at one end of the ceramic tube 3 extending from the ceramic fiber wall 2. A high-temperature bearing 4 is installed within the bearing mounting groove, and a roller 5, which rotatably contacts the roller, is mounted on the high-temperature bearing 4. The high-temperature bearing 4 ensures the smooth rotation of the roller 5. Since the operating environment temperature can reach up to 600℃, a high-temperature bearing is required. The bearing mounting groove on the outside of the high-temperature bearing 4 is responsible for mounting and fixing the high-temperature bearing 4. This structure is an integral unit. The roller 5 directly contacts the roller and conducts heat; therefore, it is made of an alloy copper material with excellent thermal conductivity, possessing both wear resistance and thermal conductivity.
[0021] A compression spring 6 is installed between the inside of the ceramic tube 3 and the outside of the high-temperature bearing 4. Due to the action of the compression spring 6, the roller 5 is always in contact with the roller. A thermocouple 7 is transversely inserted inside the ceramic tube 3. One end of the thermocouple 7 is in contact with the outside of the high-temperature bearing 4. The thermocouple 7 is a spring-type thermocouple. The temperature measuring head of the thermocouple 7 has a 10-15mm extension range to ensure that it is always in contact with the high-temperature bearing 4.
[0022] To better secure the ceramic tube 3, fixing plates 8 are installed above and below the ceramic tube 3 on both the inner and outer sides of the solid heating furnace wall 1. The fixing plates 8 are fixed to the solid heating furnace wall 1 at a distance of 10mm above and below the ceramic tube 3. Each fixing plate 8 has a first ceramic bolt 9 vertically inserted into it, which contacts the ceramic tube 3. The first ceramic bolt 9 on the inner side of the solid heating furnace wall 1 is more difficult to tighten; after a light tightening, no further adjustment is needed. The first ceramic bolt 9 on the outer side of the solid heating furnace wall 1 provides the final tightening effect, preventing the ceramic tube 3 from shifting forward or backward.
[0023] To better secure the thermocouple 7, a second ceramic bolt 10 is provided at one end of the ceramic tube 3 that extends out of the ceramic fiber wall 2, and is vertically inserted into the interior of the ceramic tube 3 and in contact with the thermocouple 7.
[0024] How to use:
[0025] In actual use, the rotation of the roll drives the roller 5 to rotate. Due to the action of the compression spring 6, the roller 5 is always in contact with the roll. The heat is transferred to the high-temperature bearing 4 through heat conduction. The thermocouple 7 is in contact with the outside of the high-temperature bearing 4. The thermocouple 7 itself has a telescopic function, which can also ensure that it is in contact with the high-temperature bearing 4 at all times. Therefore, the value measured by the thermocouple 7 is the temperature of the roll body. The temperature conduction difference is 5-20s, which can be ignored relative to the heat treatment process, thereby controlling the heating process of the heat treatment furnace.
Claims
1. A thermocouple temperature measuring device suitable for rotating rolls, characterized in that: The ceramic tube (3) is inserted laterally into the solid heating furnace wall (1) and the ceramic fiber wall (2). Multiple resistance bands (11) are provided in the ceramic fiber wall (2). The ceramic tube (3) is not connected to the resistance bands (11). A bearing mounting groove is provided at one end of the ceramic tube (3) that extends out of the ceramic fiber wall (2). A high-temperature bearing (4) is provided in the bearing mounting groove. A roller (5) that rotatably contacts the roller is provided on the high-temperature bearing (4). A compression spring (6) is provided between the inside of the ceramic tube (3) and the outside of the high-temperature bearing (4). A thermocouple (7) is inserted laterally in the ceramic tube (3). One end of the thermocouple (7) contacts the outside of the high-temperature bearing (4).
2. The thermocouple temperature measuring device suitable for rotating rolls according to claim 1, characterized in that: Fixed iron plates (8) are fixedly installed above and below the ceramic tubes (3) on both the inner and outer sides of the solid heating furnace wall (1). Each fixed iron plate (8) has a first ceramic bolt (9) that contacts the ceramic tube (3) inserted vertically.
3. A thermocouple temperature measuring device suitable for rotating rolls according to claim 2, characterized in that: The fixed iron plate (8) is fixedly installed on the solid heating furnace wall (1) at a distance of 10mm above and below the ceramic tube (3).
4. A thermocouple temperature measuring device suitable for rotating rolls according to claim 1, characterized in that: The ceramic tube (3) has a second ceramic bolt (10) that is vertically inserted into the ceramic tube (3) and in contact with the thermocouple (7) at one end extending out of the ceramic fiber wall (2).
5. A thermocouple temperature measuring device suitable for rotating rolls according to claim 1, characterized in that: The thermocouple (7) is a spring thermocouple.
6. A thermocouple temperature measuring device suitable for rotating rolls according to claim 1, characterized in that: The roller (5) is made of alloy copper.