A nitrogen heating device for grinding wheel production
By preheating nitrogen and using resistance wire to heat the guide grooves in the heat spreader, the problem of nitrogen temperature drop when changing from high pressure to normal pressure is solved, enabling faster heating of the nitrogen furnace and improving heating efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU DOME ABRASIVES MFG CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-31
AI Technical Summary
In existing nitrogen heating devices used for grinding wheel production, the compressed nitrogen gas introduced is changed from high pressure to normal pressure during use. The gas expands and absorbs heat, which causes the nitrogen furnace temperature to drop and prolongs the heating time.
By preheating the nitrogen gas and using resistance wire to heat the guide grooves in the heat spreader, it is ensured that the nitrogen gas reaches the required temperature before entering the nitrogen furnace, thus avoiding gas expansion and heat absorption.
It effectively shortens the heating time of the nitrogen furnace, improves heating efficiency, and reduces nitrogen loss and the entry of outside air.
Smart Images
Figure CN224580734U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of grinding wheel manufacturing technology, and more specifically, it relates to a nitrogen heating device for grinding wheel manufacturing. Background Technology
[0002] Nitrogen is continuously added during the curing and heating process. Nitrogen isolates the grinding wheel from air, preventing oxidation. The green grinding wheel will not turn black even when hardened to 190℃, and the label color will not change significantly, resulting in a more vibrant trademark color. This also improves adhesion and enhances the durability of the grinding wheel. Existing nitrogen heating devices for grinding wheel production use compressed nitrogen gas. The nitrogen gas changes from high pressure to atmospheric pressure, causing gas expansion and heat absorption, which lowers the nitrogen furnace temperature and prolongs the heating time. Therefore, a nitrogen heating device for grinding wheel production is proposed. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a nitrogen heating device for grinding wheel production. By preheating the nitrogen, it solves the problem mentioned in the background technology that when the nitrogen introduced is a compressed gas, the nitrogen changes from high pressure to normal pressure, and the gas expands and absorbs heat, which lowers the temperature of the nitrogen furnace and prolongs the heating time of the nitrogen furnace.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen heating device for grinding wheel production, comprising a nitrogen generator and a nitrogen furnace. A nitrogen inlet valve is fixed to one side of the nitrogen furnace, and a control cabinet is fixed to the other side of the nitrogen furnace. An exhaust valve is fixed to the top surface of the nitrogen furnace. A heat spreader plate, made of metal, is fixed to the inner side of the nitrogen furnace. A resistance wire is fixed to the outer side of the heat spreader plate. Multiple guide grooves are provided inside the heat spreader plate. A main inlet pipe is provided on one side of the heat spreader plate, and multiple inlet branch pipes are fixed to the outer side of the main inlet pipe. A main outlet pipe is provided on one side of the heat spreader plate, and multiple outlet branch pipes are fixed to the outer side of the main outlet pipe. A valve body is fixed to the output end of the main outlet pipe. An annular groove is provided inside the valve body. A cover is threaded to one end of the valve body. A valve core is slidably connected to the inner side of the valve body. A sealing ring is embedded on the outer side of the valve core. Multiple through holes are also provided on the outer side of the valve core. A spring abuts against the valve core and the cover.
[0005] As a preferred embodiment of this invention, the nitrogen inlet valve is connected to the nitrogen generator via a gas pipe.
[0006] As a preferred embodiment of this utility model, the plurality of flow channels are arranged at equal intervals, and the plurality of flow channels are arranged along the length direction of the heat spreader.
[0007] As a preferred embodiment of this utility model, the main air intake pipe is connected to the nitrogen intake valve via an air pipe.
[0008] As a preferred embodiment of this utility model, one end of each of the multiple intake branch pipes is respectively inserted into the inner side of multiple guide grooves.
[0009] As a preferred embodiment of this utility model, one end of each of the multiple air outlet branches is inserted into the inner side of a multiple guide groove.
[0010] As a preferred embodiment of this invention, the position of the through hole corresponds to the position of the annular groove.
[0011] This utility model provides a nitrogen heating device for grinding wheel production, which has the following advantages: This nitrogen heating device for grinding wheel production solves the problem that when nitrogen is introduced as compressed gas, the nitrogen expands and absorbs heat as it changes from high pressure to normal pressure, which lowers the temperature of the nitrogen furnace and prolongs the heating time.
[0012] 2. In this nitrogen heating device for grinding wheel production, when nitrogen is charged into the nitrogen furnace, the nitrogen pushes the valve core to move, allowing the nitrogen to enter the interior through the air inlet of the valve body. The nitrogen enters the through hole on the valve core through the annular groove and is discharged through the air outlet on the cover. When the nitrogen furnace stops working, the nitrogen inlet valve is closed. The pressure of the nitrogen is lower than the thrust of the spring, and the valve core prevents nitrogen from entering the interior of the valve body, thus avoiding nitrogen leakage in the guide groove and preventing nitrogen loss. At the same time, it prevents external air from entering the guide groove. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a nitrogen heating device for grinding wheel production according to this utility model.
[0014] Figure 2 This is a schematic diagram showing the disassembled and cross-sectional structure of a nitrogen heating device for grinding wheel production according to this utility model.
[0015] Figure 3 This utility model relates to a nitrogen heating device for grinding wheel production. Figure 2 Enlarged diagram of point A in the diagram.
[0016] Figure 4 This utility model relates to a nitrogen heating device for grinding wheel production. Figure 3 Enlarged diagram of point B in the image.
[0017] In the diagram: 1. Nitrogen generator; 2. Nitrogen furnace; 3. Nitrogen inlet valve; 4. Control cabinet; 5. Exhaust valve; 6. Heat spreader; 7. Flow guide groove; 8. Main inlet pipe; 9. Branch inlet pipe; 10. Main outlet pipe; 11. Branch outlet pipe; 12. Valve body; 13. Annular groove; 14. Cover; 15. Valve core; 16. Sealing ring; 17. Through hole; 18. Spring; 19. Resistance wire. Detailed Implementation
[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0019] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] Please see Figures 1 to 4This utility model provides a technical solution: a nitrogen heating device for grinding wheel production, including a nitrogen generator 1 and a nitrogen furnace 2. A nitrogen inlet valve 3 is fixed on one side of the nitrogen furnace 2, and a control cabinet 4 is fixed on the other side of the nitrogen furnace 2. An exhaust valve 5 is fixed on the top surface of the nitrogen furnace 2. A heat spreader 6, made of metal, is fixed on the inner side of the nitrogen furnace 2. A resistance wire 19 is fixed on the outer side of the heat spreader 6. Multiple guide grooves 7 are opened inside the heat spreader 6. A main air inlet pipe 8 is provided on one side of the heat spreader 6, and multiple air inlet branch pipes 9 are fixed on the outer side of the main air inlet pipe 8. A main air outlet pipe 10 is provided on one side of the heat spreader 6, and multiple air outlet branch pipes 11 are fixed on the outer side of the main air outlet pipe 10. A valve body 12 is fixed at the output end of the main air outlet pipe 10. An annular groove 13 is provided on the inner side. One end of the valve body 12 is threadedly connected to the cover 14. A valve core 15 is also slidably connected to the inner side of the valve body 12. A sealing ring 16 is embedded on the outer side of the valve core 15. Multiple through holes 17 are also provided on the outer side of the valve core 15. A spring 18 abuts between the valve core 15 and the cover 14. The nitrogen inlet valve 3 is connected to the nitrogen generator 1 through a gas pipe. Multiple guide grooves 7 are arranged at equal intervals. The multiple guide grooves 7 are arranged along the length of the heat spreader 6. The main inlet pipe 8 is connected to the nitrogen inlet valve 3 through a gas pipe. One end of multiple inlet branch pipes 9 is inserted into the inner side of multiple guide grooves 7 respectively. One end of multiple outlet branch pipes 11 is inserted into the inner side of multiple guide grooves 7 respectively. The position of the through hole 17 corresponds to the position of the annular groove 13. During operation, an external air pump evacuates the nitrogen furnace 2 through the exhaust valve 5. Then, the nitrogen inlet valve 3 is opened, and nitrogen from the nitrogen generator 1 flows through the gas pipe into the main inlet pipe 8 via the nitrogen inlet valve 3. It then enters the guide groove 7 on the heat spreader plate 6 through the inlet branch pipe 9 on the main inlet pipe 8. During this process, the resistance wire 19 heats the inside of the nitrogen furnace 2. The heat from the resistance wire 19 is transferred to the guide groove 7 through the heat spreader plate 6, thus heating the nitrogen in the guide groove 7. The heated nitrogen then enters the main outlet pipe 10 through the outlet branch pipe 11 and is discharged into the interior of the nitrogen furnace 2. This preheating of the nitrogen solves the problem of insufficient nitrogen supply during operation. To compress the gas, nitrogen gas changes from high pressure to normal pressure. The gas expands and absorbs heat, causing the nitrogen furnace temperature to drop and prolonging the heating time. When nitrogen gas is introduced into the nitrogen furnace 2, the nitrogen gas pushes the valve core 15 to move, allowing the nitrogen gas to enter the interior through the air inlet of the valve body 12. The nitrogen gas enters the through hole 17 on the valve core 15 through the annular groove 13 and is discharged through the air outlet on the cover 14. When the nitrogen furnace 2 stops working, the nitrogen gas inlet valve 3 is closed. The nitrogen gas pressure is lower than the thrust of the spring 18, and the valve core 15 prevents nitrogen gas from entering the interior of the valve body 12, avoiding nitrogen gas leakage in the guide groove 7 and thus preventing nitrogen loss. At the same time, it prevents external air from entering the guide groove 7.
[0022] The specific usage and function of this embodiment: When this utility model is in use, the external air pump performs vacuum treatment on the nitrogen furnace 2 through the exhaust valve 5. Then, the nitrogen inlet valve 3 is opened, and the nitrogen in the nitrogen generator 1 flows through the gas pipe through the nitrogen inlet valve 3 into the main inlet pipe 8. It then enters the guide groove 7 on the heat spreader plate 6 through the inlet branch pipe 9 on the main inlet pipe 8. During this process, the resistance wire 19 heats the inside of the nitrogen furnace 2. The heat of the resistance wire 19 is transferred to the inside of the guide groove 7 through the heat spreader plate 6, thereby heating the nitrogen in the guide groove 7. The heated nitrogen enters the main outlet pipe 10 through the outlet branch pipe 11 and is discharged into the inside of the nitrogen furnace 2. When nitrogen is introduced into the nitrogen furnace 2, the nitrogen pushes the valve core 15 to move, allowing the nitrogen to enter the interior through the air inlet of the valve body 12. The nitrogen then enters the through hole 17 on the valve core 15 through the annular groove 13 and is discharged through the air outlet on the cover 14. When the nitrogen furnace 2 stops working, the nitrogen inlet valve 3 is closed. The pressure of the nitrogen is lower than the thrust of the spring 18, and the valve core 15 prevents the nitrogen from entering the interior of the valve body 12, thus preventing nitrogen leakage in the guide groove 7 and avoiding nitrogen loss. At the same time, it also prevents external air from entering the guide groove 7.
[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A nitrogen heating device for grinding wheel production, comprising a nitrogen generator (1) and a nitrogen furnace (2), characterized in that: A nitrogen inlet valve (3) is fixed on one side of the nitrogen furnace (2), and a control cabinet (4) is fixed on the other side of the nitrogen furnace (2). A flue gas exhaust valve (5) is fixed on the top surface of the nitrogen furnace (2). A heat spreader plate (6) is fixed inside the nitrogen furnace (2). The heat spreader plate (6) is made of metal. A resistance wire (19) is fixed on the outside of the heat spreader plate (6). Multiple guide grooves (7) are opened inside the heat spreader plate (6). An air inlet main pipe (8) is provided on one side of the heat spreader plate (6). Multiple air inlet branch pipes (9) are fixed on the outside of the air inlet main pipe (8). One side of the heat spreader plate (6) is a... A main exhaust pipe (10) is provided on the side, and multiple exhaust branch pipes (11) are fixed on the outer side of the main exhaust pipe (10). A valve body (12) is fixed at the output end of the main exhaust pipe (10). An annular groove (13) is provided on the inner side of the valve body (12). A cover (14) is threaded to one end of the valve body (12). A valve core (15) is also slidably connected to the inner side of the valve body (12). A sealing ring (16) is embedded on the outer side of the valve core (15). Multiple through holes (17) are also opened on the outer side of the valve core (15). A spring (18) abuts between the valve core (15) and the cover (14).
2. The nitrogen heating device for grinding wheel production according to claim 1, characterized in that: The nitrogen inlet valve (3) is connected to the nitrogen generator (1) via a gas pipe.
3. The nitrogen heating device for grinding wheel production according to claim 1, characterized in that: Multiple flow channels (7) are arranged at equal intervals, and the multiple flow channels (7) are arranged along the length direction of the heat spreader (6).
4. The nitrogen heating device for grinding wheel production according to claim 1, characterized in that: The main intake pipe (8) is connected to the nitrogen intake valve (3) via a pipe.
5. A nitrogen heating device for grinding wheel production according to claim 1, characterized in that: One end of each of the multiple air intake branches (9) is inserted into the inner side of a multiple guide groove (7).
6. The nitrogen heating device for grinding wheel production according to claim 1, characterized in that: One end of each of the multiple air outlet branches (11) is inserted into the inner side of a multiple guide groove (7).
7. A nitrogen heating device for grinding wheel production according to claim 1, characterized in that: The position of the through hole (17) corresponds to the position of the annular groove (13).