Continuous chain belt type sintering furnace device
By adding a temperature-controlled thermocouple, an oxygen content analyzer, and dual ignition wires in parallel design to the continuous chain sintering furnace, the product quality problems caused by the failure and malfunction of the temperature-controlled thermocouple were solved, safe and reliable automated operation was achieved, and labor costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZONGHENG TIANJIN SCI & TECH DEV CO LTD OF CHINA ACADEMY OF RAILWAY SCI
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-12
AI Technical Summary
The existing continuous chain belt sintering furnace cannot detect the failure of the temperature control thermocouple in time, resulting in abnormal temperature range. Furthermore, the hydrogen gas is forcibly disconnected when the oxygen content analyzer and ignition wire malfunction, causing the product quality to be substandard.
A temperature-controlled thermocouple and an oxygen content analyzer are added to each temperature field and connected in parallel. The dual-ignition wire design allows for automatic switching to the backup device. The central control system monitors and alarms to avoid product quality problems caused by a single failure.
It enables timely detection of temperature-controlled thermocouple malfunctions, ensures safe and leak-free hydrogen supply, avoids product quality defects, and reduces manual operation costs.
Smart Images
Figure CN224230688U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of powder metallurgy technology, and in particular to a continuous chain belt sintering furnace apparatus. Background Technology
[0002] Continuous chain belt sintering furnaces are common sintering equipment in the powder metallurgy industry. They typically consist of multiple temperature zones, with the temperature zones generally exceeding 10 meters in length. Each temperature zone is equipped with a heating device and a temperature-controlled thermocouple at its center. During the sintering process, hydrogen gas is introduced to reduce the product, and the oxygen content is monitored in real time to ensure safety within the furnace. Unoxidized hydrogen gas can be ignited through an ignition wire at the exhaust port, ensuring safety throughout the sintering process.
[0003] Currently, existing continuous chain belt sintering furnaces use a single thermocouple for temperature control, meaning one thermocouple is placed in each temperature field to control the sintering temperature. However, if any thermocouple in any temperature field fails, the long temperature range and the inability to quickly detect the faulty thermocouple result in the batch of products failing to meet quality standards. Furthermore, existing continuous chain belt sintering furnaces typically use a single oxygen content analyzer to detect the oxygen content in the furnace. When this analyzer malfunctions, hydrogen gas is forcibly shut off to ensure furnace safety, leading to substandard product quality. Additionally, existing continuous chain belt sintering furnaces use a single ignition wire to ignite remaining hydrogen. If this ignition wire malfunctions, the sintering equipment will forcibly shut off hydrogen gas to prevent incompletely oxidized hydrogen from leaking into the workshop environment, also resulting in substandard product quality.
[0004] Therefore, based on years of experience and practice in related industries, the inventor proposed a continuous chain belt sintering furnace device to overcome the shortcomings of existing technologies.
[0005] This section is intended to provide background or context for the embodiments of this application set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section. Utility Model Content
[0006] To address the problems in the prior art, this application provides a continuous chain belt sintering furnace device to solve the problem that the failure of temperature control thermocouples in any temperature field cannot be detected in time, thereby avoiding the problem of product quality defects caused by abnormal temperature ranges due to the failure of temperature control thermocouples.
[0007] The continuous chain belt sintering furnace device includes: a chain belt conveyor mechanism and a sintering device;
[0008] The chain conveyor mechanism includes: a chain, a motor, and a chain rotating shaft;
[0009] The sintering apparatus includes: a sintering furnace body, a dual-ignition wire at the feed inlet, a hydrogen content analyzer, and a dual-ignition wire at the discharge outlet; the sintering temperature zone of the sintering furnace body is equipped with multiple temperature control thermocouples and multiple monitoring thermocouples.
[0010] The dual ignition wires at the feed inlet are located at the chamber entrance of the sintering furnace body, and the dual oxygen content analyzer and the dual ignition wires at the discharge outlet are located at the chamber outlet of the sintering furnace body.
[0011] Preferably, the sintering temperature zone includes multiple sub-sintering temperature zones, and each sub-sintering temperature zone is equipped with a temperature control thermocouple and a monitoring thermocouple.
[0012] Preferably, the feed inlet has two ignition wires connected in parallel.
[0013] Preferably, the discharge port has two ignition wires connected in parallel.
[0014] Preferably, the hydrogen peroxide content analyzers are connected in parallel.
[0015] Preferably, the sintering temperature zone further includes multiple heating resistors, with each sub-sintering temperature zone having one heating resistor.
[0016] Preferably, adjacent sub-sintering temperature zones are connected.
[0017] Preferably, the sintering temperature zone is connected to the cooling zone of the sintering furnace body.
[0018] Preferably, the device further includes: a central control system; the motor, the dual ignition wire at the feed inlet, the oxygen content analyzer, the dual ignition wire at the discharge outlet, the multiple temperature control thermocouples, the multiple monitoring thermocouples, and the multiple heating resistors are respectively electrically connected to the central control system.
[0019] Preferably, the chain belt passes through the chamber of the sintering furnace body, and the chain belt is connected to the motor.
[0020] This utility model provides a continuous chain belt sintering furnace device, which has the following beneficial effects:
[0021] By adding a temperature-controlled thermocouple to each temperature field, the problem of the inability to detect thermocouple failure in any temperature field in a timely manner is solved, avoiding product quality defects caused by abnormal temperature zones due to thermocouple failure. Furthermore, by adding an oxygen content analyzer and connecting two oxygen content analyzers in parallel, when one oxygen content analyzer fails, it automatically switches to the other to detect the oxygen content in the furnace, avoiding product quality defects caused by automatic hydrogen disconnection due to oxygen content analyzer failure. In addition, by adding an ignition wire at the gas outlet of the sintering furnace and connecting two ignition wires in parallel, when one ignition wire malfunctions, it automatically switches to the other ignition wire and issues an alarm, thus avoiding product quality defects caused by automatic hydrogen disconnection due to ignition wire failure. With these components, operators only need to monitor the display screen, eliminating the need for manual operation of the sintering unit and reducing labor costs. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0023] Figure 1 This is a schematic diagram of the physical structure of a continuous chain belt sintering furnace device in one embodiment of the present invention;
[0024] Figure 2 This is a schematic diagram of the physical structure of the neutron sintering temperature zone in one embodiment of the present invention. Detailed Implementation
[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0027] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0028] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0031] To address the issues of substandard product quality caused by problems such as the inability to quickly detect malfunctioning temperature control thermocouples due to excessively long sintering temperature zones and the forced disconnection of hydrogen gas to ensure furnace safety, this application provides a continuous chain belt sintering furnace device.
[0032] like Figure 1As shown, the sintering furnace device 1 includes a chain conveyor mechanism 10 and a sintering device 20.
[0033] The chain conveyor mechanism 10 includes: a chain belt 101, a motor 102, and two chain belt rotating shafts 103.
[0034] Specifically, the chain belt 101 passes through the chamber of the sintering furnace body 21 and is connected to the chain belt rotating shafts 103 at both ends of the sintering furnace body 21. One chain belt rotating shaft 103 is located on the first guard plate 124 at the inlet of the sintering furnace body 21, and the other chain belt rotating shaft 103 is located on the first guard plate 124 at the outlet of the sintering furnace body 21.
[0035] In one embodiment, the first guard plate 124 can protect the chain belt 101 and the two chain belt rotating shafts 103 from external impact.
[0036] In one embodiment, when the sintering furnace is running, a motor 102 connects two chain belt rotating shafts 103 via a chain belt 101, driving the chain belt 101 and the two chain belt rotating shafts 103 to rotate in the chain belt running direction. The product to be sintered is placed at the entrance of the sintering furnace body 21. The product to be sintered travels along the chain belt 101 from the entrance of the sintering furnace body 21 through the sintering furnace body 21 to the exit of the sintering furnace body 21. The operator can then remove the sintered product from the exit of the sintering furnace body 21.
[0037] In one embodiment, two chain belt rotating shafts 103 are used to make the chain belt 101 run smoothly and change the direction of movement of the chain belt 101.
[0038] Specifically, the sintering device 20, the chain belt 101, and the motor 102 are disposed in the second guard plate 125.
[0039] In one embodiment, the second protective plate 125 is used to protect the sintering furnace body 21 from external impact.
[0040] The sintering apparatus 20 includes: a sintering furnace body 21, a double ignition wire at the feed inlet 104, a double ignition wire at the discharge outlet 105, a hydrogen content analyzer 106, and a central control system 107.
[0041] The sintering furnace body 21 includes a sintering temperature zone 22 and a cooling zone 23, with the sintering temperature zone 22 and the cooling zone 23 being closely connected.
[0042] In one embodiment, the cooling zone 23 uses cold water to cool the fired product.
[0043] Specifically, the sintering temperature zone 22 of the sintering furnace body is equipped with multiple temperature control thermocouples 121, multiple monitoring thermocouples 122, and multiple heating resistors 123. The sintering temperature zone 22 includes multiple sub-sintering temperature zones (108-120), which are connected to form the sintering temperature zone 22. Each sub-sintering temperature zone (108-120) is equipped with one temperature control thermocouple 121, one monitoring thermocouple 122, and one heating resistor 123.
[0044] In one embodiment, the temperature-controlling thermocouple 121 of each sub-sintering temperature zone (108-120) is used to control the heating resistor 123 in that sub-sintering zone to perform heating. The monitoring thermocouple 122 is used to monitor the temperature of that sub-sintering zone in real time. The real-time temperature values measured by both the temperature-controlling thermocouple 121 and the monitoring thermocouple 122 are displayed on a screen.
[0045] For example, when the temperature-controlling thermocouple 121 fails, the preset temperature of the sub-sintering temperature zone is X℃, while the actual temperature of the temperature-controlling thermocouple 121 in that sub-sintering temperature zone is X+Y℃. At this time, the temperature displayed on the temperature-controlling thermocouple 121 display is X℃, but the display on the monitoring thermocouple 122 will show the temperature of the sub-sintering temperature zone as X+Y℃. That is, when the temperature-controlling thermocouple 121 fails, it can be checked immediately through the monitoring thermocouple 122. Conversely, when the monitoring thermocouple 122 fails, it can be checked immediately through the temperature-controlling thermocouple 121. In other words, the temperature-controlling thermocouple 121 and the monitoring thermocouple 122 can monitor each other.
[0046] like Figure 2 As shown, the exterior of multiple sub-sintering temperature zones (108-120) is wrapped with sintering temperature zone insulation cotton 201.
[0047] In one embodiment, multiple sub-sintering temperature zones (108-120°C) are used to fire the product to be fired. The sintering temperature zone insulation cotton 201 provides insulation for the multiple sub-sintering temperature zones (108-120°C).
[0048] Specifically, the dual ignition wires 104 at the feed inlet are located at the chamber inlet of the sintering furnace body, and the dual ignition wires 105 at the discharge outlet and the oxygen content analyzer 106 at the chamber outlet of the sintering furnace body are located at the chamber outlet. The dual ignition wires 104 at the feed inlet are connected in parallel, the dual ignition wires 105 at the discharge outlet are connected in parallel, and the oxygen content analyzer 106 is connected in parallel.
[0049] Specifically, the parallel connection of the two ignition wires 104 at the feed inlet means that the two ignition wires share a single ignition channel, and the parallel connection of the two ignition wires 105 at the discharge outlet means that the two ignition wires share a single ignition channel.
[0050] In one embodiment, the electric igniter design can use two independent igniters with two ignition wires sharing a common flame transmission channel. During the operation of the sintering furnace, one ignition wire is active while the other serves as a backup, thus improving the reliability of the electric igniter.
[0051] In one embodiment, during the use of the sintering furnace, the dual ignition wires 104 at the feed inlet and 105 at the discharge outlet are used to ignite incompletely oxidized hydrogen, preventing hydrogen leakage into the workshop environment. If one of the ignition wires malfunctions during furnace operation, the central control system will automatically switch to the other ignition wire and issue an alarm to ensure that hydrogen within the furnace cavity does not leak into the workshop environment. This ensures both that hydrogen does not leak from the furnace cavity and that the central control system automatically disconnects the hydrogen supply.
[0052] In one embodiment, during the use of the sintering furnace, the oxygen content analyzer 106 is used to monitor the oxygen content in the sintering furnace cavity in real time. When the oxygen content is lower than a preset oxygen content threshold, the hydrogen supply is disconnected and an alarm signal is issued. If one oxygen content analyzer malfunctions, the central control system will automatically switch to another oxygen content analyzer to avoid the central control system automatically disconnecting the hydrogen supply due to analyzer failure, thus preventing the batch of products from failing quality standards. The preset oxygen content threshold can be set according to the needs of those skilled in the art.
[0053] Specifically, the motor 102, the inlet dual ignition wire 104, the outlet dual ignition wire 105, the oxygen content analyzer 106, multiple temperature control thermocouples 121, multiple monitoring thermocouples 122, and multiple heating resistors 123 are electrically connected to the central control system 107.
[0054] In one embodiment, the central control system 107 is also used to control the operation of the sintering furnace and to control the temperature control thermocouple 121 to heat the resistance wires of multiple heating resistors 123 according to the temperature control program stored in the central control system 107, so as to adjust the temperature of multiple sub-sintering temperature zones (108-120).
[0055] This application solves the problem of undetectable thermocouple failure in any temperature field by adding a temperature-controlled thermocouple to each temperature field, thus avoiding product quality defects caused by abnormal temperature zones due to thermocouple failure. Furthermore, by adding an oxygen content analyzer and connecting two oxygen content analyzers in parallel, the system automatically switches to the other analyzer to detect the oxygen content in the furnace when one analyzer fails, preventing product quality defects caused by automatic hydrogen disconnection due to analyzer failure. In addition, by adding an ignition wire at the gas outlet of the sintering furnace and connecting two ignition wires in parallel, the system automatically switches to the other ignition wire and issues an alarm when one ignition wire malfunctions, thus preventing product quality defects caused by automatic hydrogen disconnection due to ignition wire failure. With these components, operators only need to monitor the display screen, eliminating the need for manual operation of the sintering unit and reducing labor costs.
[0056] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.
Claims
1. A continuous chain belt sintering furnace device, characterized in that, include: Chain conveyor mechanism and sintering device; The chain conveyor mechanism includes: a chain, a motor, and a chain rotating shaft; The sintering apparatus includes: a sintering furnace body, a dual-ignition wire at the feed inlet, a hydrogen content analyzer, and a dual-ignition wire at the discharge outlet; the sintering temperature zone of the sintering furnace body is equipped with multiple temperature control thermocouples and multiple monitoring thermocouples. The dual ignition wires at the feed inlet are located at the chamber entrance of the sintering furnace body, and the dual oxygen content analyzer and the dual ignition wires at the discharge outlet are located at the chamber outlet of the sintering furnace body.
2. The apparatus according to claim 1, characterized in that, The sintering temperature zone includes multiple sub-sintering temperature zones, and each sub-sintering temperature zone is equipped with a temperature control thermocouple and a monitoring thermocouple.
3. The apparatus according to claim 1, characterized in that, The feed inlet has two parallel ignition wires.
4. The apparatus according to claim 1, characterized in that, The discharge port has two parallel ignition wires.
5. The apparatus according to claim 1, characterized in that, The hydrogen peroxide content analyzers are connected in parallel.
6. The apparatus according to claim 1, characterized in that, The sintering temperature zone also includes multiple heating resistors, with one heating resistor provided in each sub-sintering temperature zone.
7. The apparatus according to claim 2, characterized in that, Adjacent sub-sintering temperature zones are connected.
8. The apparatus according to claim 2, characterized in that, The sintering temperature zone is connected to the cooling zone of the sintering furnace body.
9. The apparatus according to claim 6, characterized in that, Also includes: The central control system includes the motor, the dual ignition wires at the feed inlet, the oxygen content analyzer, the dual ignition wires at the discharge outlet, multiple temperature control thermocouples, multiple monitoring thermocouples, and multiple heating resistors, all of which are electrically connected to the central control system.
10. The apparatus according to claim 1, characterized in that, The chain belt passes through the chamber of the sintering furnace body and is connected to the motor.