一种轴承热处理的碳势供气系统
By designing a carbon potential supply system with multiple nitrogen gas branches and PID regulation, the problems of insufficient accuracy and response speed in the existing system were solved, and precise control of carbon potential and consistency of quality were achieved during the bearing heat treatment process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WAFANGDIAN BEARING GRP STATE BEARING ENG TECH RES CENT CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-07-17
AI Technical Summary
Existing carbon potential gas supply systems have shortcomings in control precision, response speed, and gas mixing uniformity, leading to fluctuations in product quality and inconsistencies in overall quality during bearing heat treatment.
A carbon potential supply system was designed, which includes a heating furnace, propane pipeline, nitrogen pipeline and process air pipeline. Through multiple independently controlled nitrogen branches and PID regulation, the carbon potential can be quickly and accurately adjusted to ensure uniform gas mixing and positive pressure in the furnace.
It improves the accuracy and stability of carbon potential control, ensures the consistency of bearing heat treatment quality, quickly responds to heat treatment process requirements, and reduces product quality fluctuations.
Smart Images
Figure CN224513571U_ABST
Abstract
Claims
1. A bearing heat treatment carbon potential gas supply system characterized by: The system includes a heating furnace, propane pipelines, nitrogen pipelines, and process air pipelines. The propane pipelines, nitrogen pipelines, and process air pipelines are connected to the furnace chamber of the heating furnace. The propane pipeline is equipped with a propane flow meter and a propane flow regulating valve to monitor and regulate the propane flow rate. It also has a propane solenoid valve to control the propane supply. The nitrogen pipeline is equipped with a nitrogen flow meter, and the nitrogen pipeline branches downstream of the flow meter to form multiple independently controlled nitrogen branches, which are connected to the furnace chamber of the heating furnace. The process air pipeline is connected to an air supply pump and is equipped with an air flow meter and an air flow regulating valve to monitor and regulate the air flow rate. It also has an air solenoid valve to control the air supply.
2. A carbon potential gas supply system for bearing heat treatment as defined in claim 1, wherein: The outlets of the propane pipeline and the process air pipeline are connected to the control main pipe, which is equipped with a main control solenoid valve. The control main pipe is connected to the main air inlet pipeline, which is connected to the heating furnace and extends into the furnace chamber. Among the multiple nitrogen branches formed by the nitrogen pipeline branches, the outlet of the first nitrogen branch is connected to the control main pipe and controlled by the main control solenoid valve, while the outlets of the remaining nitrogen branches are connected to the main air inlet pipeline.
3. A carbon potential gas supply system for bearing heat treatment as defined in claim 2 wherein: The main control solenoid valve is a normally closed solenoid valve that opens when energized.
4. A carbon potential gas supply system for bearing heat treatment as defined in claim 2 wherein: The nitrogen pipeline is equipped with a main nitrogen valve and a nitrogen pressure reducing valve at its inlet. The nitrogen pipeline branches into a first nitrogen branch, a second nitrogen branch, a third nitrogen branch, and a fourth nitrogen branch. The first nitrogen branch is equipped with a first branch manual valve and a first branch regulating valve. The second nitrogen branch is equipped with a second branch manual valve and a second branch solenoid valve. The third nitrogen branch is equipped with a third branch manual valve. The fourth nitrogen branch is equipped with a fourth branch manual valve and a fourth branch solenoid valve. The outlets of the second, third, and fourth nitrogen branches are connected to the main nitrogen inlet pipeline.
5. A carbon potential gas supply system for bearing heat treatment as defined in claim 4 wherein: The fourth branch solenoid valve is a normally closed solenoid valve that conducts when energized, and it is energized by a timer and de-energized when the timer expires; the second branch solenoid valve is a normally open solenoid valve that closes when energized; and the third branch manual valve is normally closed.
6. A carbon potential gas supply system for bearing heat treatment as defined in claim 1 wherein: The nitrogen pipeline is connected to the nitrogen input pipeline for cooling. The inlet of the nitrogen input pipeline for cooling is located before the nitrogen flow meter, and the outlet of the nitrogen input pipeline for cooling is connected to the heating furnace for cooling the roller bearings of the transmission rollers in the heating furnace channel. The nitrogen input pipeline for cooling is equipped with a nitrogen control valve for cooling and a nitrogen flow meter for cooling.
7. The carbon potential gas supply system for bearing heat treatment according to claim 1, characterized in that: The propane pipeline is equipped with a main propane valve and a pressure reducing valve at its inlet, and a manual propane valve is installed upstream of the propane flow meter. The propane solenoid valve is equipped with a bypass, and a bypass valve is connected to the bypass.
8. A carbon potential gas supply system for bearing heat treatment as defined in claim 1 wherein: The heating furnace is equipped with an oxygen probe. A reference gas air pump is connected to the oxygen probe connector through a reference gas pipeline and a carbon potential purge gas pipeline. A reference gas manual valve and a reference gas flow meter are sequentially installed on the reference gas pipeline. A carbon potential purge gas manual valve, a carbon potential purge gas flow meter, and a carbon potential purge gas solenoid valve are sequentially installed on the carbon potential purge gas pipeline. The carbon potential purge gas solenoid valve is a normally closed solenoid valve that opens when energized. The carbon potential purge gas solenoid valve is activated for 60-90 seconds every 3-8 hours.
9. A carbon potential gas supply system for bearing heat treatment as defined in claim 1 wherein: The heating furnace is connected to an ammonia pipeline, which is connected to the furnace chamber of the heating furnace for carbonitriding and controlled by a manual valve. An ammonia flow meter is installed on the ammonia pipeline.
10. A carbon potential gas supply system for bearing heat treatment as defined in claim 1 wherein: The propane solenoid valve and the air solenoid valve are normally closed solenoid valves, which are opened when energized; the output time and frequency of the air solenoid valve and the propane solenoid valve are adjusted by the instrument through PID control.