Temperature measuring device of rotary heat treatment furnace
By introducing temperature-measuring thermocouples through conduits outside the rotary heat treatment furnace, the problem of high-cost and high-risk furnace temperature measurement was solved, enabling low-cost, long-term furnace temperature tracking testing and improving production reliability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-24
AI Technical Summary
Existing temperature measuring devices for rotary heat treatment furnaces have drawbacks such as high instrument costs, poor heat preservation, and easy damage during furnace temperature measurement, which can lead to the risk of batch scrapping of products in the heat treatment process.
A conduit is used to introduce the thermocouple from outside the furnace into the furnace. The furnace temperature is tracked and tested using a common temperature measuring instrument. The temperature measuring instrument is placed outside the furnace to avoid damage from high temperatures. Using a common temperature measuring instrument reduces costs and enables long-term continuous temperature measurement.
It enables low-cost, long-term furnace temperature tracking testing, reducing the risk of equipment damage and improving production reliability and safety.
Smart Images
Figure CN224034797U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a temperature measuring device for a rotary heat treatment furnace, which is used for furnace temperature tracking and testing of rotary heat treatment furnaces or heating furnaces, and belongs to the technical field of industrial furnace heat treatment. Background Technology
[0002] In the heating and heat treatment processes of automotive engine components such as cylinder blocks, cylinder heads, and wheel hubs, rotary furnaces are now widely used for their ease of automation and management. The heat treatment process requires high temperature accuracy; new furnaces must undergo temperature testing before use and can only be put into production if they pass the test. Older equipment also requires periodic temperature monitoring to ensure continued operation. However, rotary furnaces use a single-workpiece, multi-layer loading and conveying method, resulting in limited internal space. This is because the temperature measuring instrument must be installed inside the furnace and heated alongside the workpiece to track the furnace temperature. Conventional temperature measuring instruments have large insulation boxes, while the space at each workstation within the furnace is limited, making it impossible to place them inside. The common industry practice is to customize a dedicated temperature measuring instrument with a small insulation box (with a thinner insulation layer). However, custom-made temperature measuring instruments are very expensive, and the insulation effect is often insufficient. If the temperature exceeds the limit during testing, the temperature measuring instrument risks burning out, which is a frequent occurrence. Alternatively, temperature measurements may be discontinued, increasing the risk of batch scrapping of products from the heat treatment process.
[0003] Therefore, this utility model is proposed. Utility Model Content
[0004] To address the aforementioned technical problems in the prior art, the purpose of this utility model is to provide a temperature measuring device for a rotary heat treatment furnace. When measuring temperature, the thermometer can be placed outside the furnace, and an inexpensive, ordinary thermometer can be used for testing. No special high-temperature resistant insulation box is required. It has the advantages of simple installation and operation, low testing cost, and continuous long-term testing capability.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A temperature measuring device for a rotary heat treatment furnace includes a conduit that extends from the bottom of the furnace bed into the furnace. A thermocouple is inserted into the conduit, with one end of the thermocouple connected to a temperature measuring instrument and the other end serving as a temperature measuring end. The furnace is equipped with a rotary material rack, on which temperature-measuring workpieces are placed. The temperature measuring end is attached to a temperature measuring point on the workpiece.
[0007] A temperature measuring instrument support is installed at the bottom of the rotary kiln bed, and the temperature measuring instrument is mounted on the temperature measuring instrument support.
[0008] The aforementioned conduit is located on one side of the thermometer support.
[0009] When the rotary kiln is in normal use, the conduit is blocked with insulating cotton.
[0010] The rotary material rack is installed on the rotary kiln bed and rotates together with the rotary kiln bed.
[0011] The rotary material rack is a multi-layer structure, with 10-20 workstations per layer, arranged in a ring, and 1-3 temperature measuring workpieces placed at each workstation.
[0012] The beneficial effects of this utility model are as follows:
[0013] The temperature measuring device of this utility model for a rotary heat treatment furnace places the thermometer outside the rotary furnace, and the temperature measuring thermocouple extends into the rotary furnace through a conduit installed on the rotary furnace bed to measure the temperature. Because the thermometer is outside the rotary furnace and in a normal temperature environment during temperature measurement, there is no need for a special furnace temperature tracking test instrument. It can measure the temperature continuously for a long time, and the furnace temperature adjustment is extremely convenient. Because a common type of thermometer is used, the testing cost is also greatly reduced. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Among them, 1 is the temperature measuring instrument, 2 is the temperature measuring instrument support, 3 is the conduit, 4 is the temperature measuring thermocouple, 5 is the temperature measuring workpiece, 6 is the rotary material rack, and 7 is the rotary furnace bed. Detailed Implementation
[0016] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.
[0017] like Figure 1 As shown, the temperature measuring device of this utility model for a rotary heat treatment furnace has a temperature measuring instrument support 2 welded to the bottom of the rotary furnace bed 7, positioned as close to the outer side as possible for easy installation and adjustment. However, when the rotary furnace bed 7 rotates, it must not interfere with the support wheels or other mechanisms at the furnace bottom. An opening is made at the bottom of the rotary furnace bed 7, and a conduit 3 is welded into the furnace. The conduit 3 must pass through the insulation layer of the rotary furnace bed 7, and its position should be next to the temperature measuring instrument support 2. When not measuring temperature, the conduit 3 is filled with insulation cotton to prevent hot air from escaping from the furnace.
[0018] Furthermore, in this invention, a temperature-measuring thermocouple 4 is inserted into the conduit 3. One end of the temperature-measuring thermocouple 4 is connected to a temperature measuring instrument 1, and the other end of the temperature-measuring thermocouple 4 is the temperature measuring end. A rotary material rack 6 is provided inside the rotary furnace, and the rotary material rack 6 is installed on the rotary furnace bed 7. The rotation of the rotary furnace bed 7 also drives the rotary material rack 6 to rotate. The rotary material rack 6 has a multi-layer structure, with about 10 to 20 workstations on each layer, arranged in a ring. Each workstation places 1 to 3 temperature-measuring workpieces 5, and the temperature measuring end is tied to the temperature measuring point of the temperature-measuring workpiece 5.
[0019] In the process of furnace temperature tracking test, the temperature measuring instrument 1 is placed on the temperature measuring instrument support 2, the temperature measuring thermocouple 4 is connected with the temperature measuring instrument 1, the temperature measuring end is inserted into the furnace through the pipe 3 and is bound on the temperature measuring point of the temperature measuring workpiece 5 in the furnace, the temperature measuring workpiece 5 is placed on the rotary rack 6, after the thermocouples of all temperature measuring points are installed, the rotary furnace can carry out continuous temperature rising test.
[0020] The utility model discloses simple operation, with normal temperature's external temperature measuring instrument 1 can carry out furnace temperature tracking test, greatly reduced test cost.
[0021] The above embodiment is only used for explaining the inventive concept of the utility model, and is not limited to the protection of the utility model, and any non-essential change of the utility model by using the concept should fall within the protection scope of the utility model.
Claims
1. A temperature measuring device for a rotary heat treatment furnace, characterized by: The utility model relates to a temperature measuring device for rotary furnace, including the pipe that goes into the rotary furnace from the bottom of rotary hearth, goes into the temperature measuring thermocouple in the pipe, the one end of temperature measuring thermocouple is connected with temperature measuring instrument, and the other end of temperature measuring thermocouple is temperature measuring end, be equipped with rotary rack in the rotary furnace, be equipped with temperature measuring workpiece on the rotary rack, temperature measuring end is bound on the temperature measuring point of temperature measuring workpiece.
2. The temperature measuring device for a rotary heat treatment furnace according to claim 1, wherein: The bottom of the rotary hearth is provided with a temperature measuring instrument support, and the temperature measuring instrument is installed on the temperature measuring instrument support.
3. The temperature measuring device for a rotary heat treatment furnace according to claim 2, wherein: The pipe is located on one side of the temperature measuring instrument support.
4. The temperature measuring device for a rotary heat treatment furnace according to claim 1, wherein: In normal use of the rotary furnace, the pipe is blocked by heat insulation cotton.
5. The temperature measuring device for the rotary heat treatment furnace as described in claim 1, characterized in that: The rotary rack is installed on the rotary hearth and rotates with the rotary hearth.
6. The temperature measuring device for a rotary heat treatment furnace according to claim 5, wherein: The rotary rack has a multi-layer structure, each layer of the rotary rack has 10-20 workstations, and the workstations are arranged in a ring shape, and each workstation is provided with 1-3 temperature measuring workpieces.