Accurate temperature control type ion nitriding furnace

Abstract

The utility model discloses an accurate temperature control type ion nitriding furnace in the technical field of ion nitriding furnaces, which comprises an ion nitriding furnace, a heating box and a shunt box, the heating box is arranged at the bottom of the outer wall of the ion nitriding furnace, the shunt box is fixedly arranged on the right side of the heating box, a constant-temperature pipe is sleeved in an interlayer of the ion nitriding furnace, and a steam hole is formed in the top of the constant-temperature pipe. A water outlet is formed in the left side of the bottom of the constant-temperature pipe and connected with the heating box, a water inlet is formed in the right side of the bottom of the constant-temperature pipe and connected with the flow dividing box, and a circulating device is connected to the left side of the heating box. The temperature needed in the furnace can be accurately adjusted, meanwhile, water vapor is effectively utilized by the steam holes and the exhaust holes for heat preservation and energy saving measures, high-pressure water vapor is formed through sealing of the furnace body, energy consumption is reduced, the temperature control effect in the using process is improved, and good market benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of ion nitriding furnace technology, specifically a precision temperature-controlled ion nitriding furnace. Background Technology

[0002] An ion nitriding furnace is a device that uses a vacuum container to ionize a nitrogen-containing rarefied gas in a DC electric field. Positive ions bombard the metal surface of mechanical parts to form a nitriding layer, thereby achieving surface hardening. Placing the metal surface of mechanical parts in an ion nitriding furnace for surface desalination treatment can effectively improve the surface hardness, wear resistance, corrosion resistance, and quality of the workpiece, as well as extend the service life of mechanical parts.

[0003] Currently, ion nitriding furnaces operate by creating a vacuum and relatively hot environment to apply a nitriding layer to the surface of parts. However, the process of ion infiltration of nitriding materials into the workpiece requires a long time and a constant temperature to form a nitriding layer on the metal surface of the mechanical parts. Some ion nitriding furnaces on the market use liquid nitrogen for cooling, but their preparation, storage, and use costs are high. Furthermore, the rapid temperature drop inside the furnace during use may cause cracks in the workpiece, and the evaporation of liquid nitrogen releases a large amount of nitrogen gas, which can pollute the air environment, posing certain safety risks during use.

[0004] Based on this, this utility model designs a precision temperature-controlled ion nitriding furnace to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a precise temperature-controlled ion nitriding furnace to address the issues raised in the background art. Currently, some ion nitriding furnaces on the market use liquid nitrogen for cooling, but their preparation, storage, and use costs are high. Furthermore, the rapid temperature drop inside the furnace during use may cause cracks in the workpiece, and the evaporation of liquid nitrogen releases a large amount of nitrogen gas, which can pollute the air environment and pose certain safety risks during use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precision temperature-controlled ion nitriding furnace, comprising an ion nitriding furnace, a heating chamber, and a distribution box. The heating chamber is installed at the bottom of the outer wall of the ion nitriding furnace. The distribution box is fixedly installed on the right side of the heating chamber. A constant temperature tube is sleeved inside the jacket of the ion nitriding furnace. A steam hole is opened at the top of the constant temperature tube. A water outlet is opened on the left side of the bottom of the constant temperature tube and is connected to the heating chamber. A water inlet is opened on the right side of the bottom of the constant temperature tube and is connected to the distribution box. A circulation device is connected to the left side of the heating chamber.

[0007] Preferably, the circulation device includes a water pump, the right end of which is connected to the heating box, a circulation pipe is connected to the outer wall of the water pump, the other end of the circulation pipe is connected to a diversion box, an inspection cover is installed on the top of the diversion box, and a diversion device is installed inside the diversion box.

[0008] Preferably, the diversion device includes a connecting box and a servo motor. The servo motor is fixedly installed on the outer wall of the diversion box and is detachable. The output shaft of the servo motor passes through the connecting box, and a diversion plate is fixedly installed at the end of the output shaft of the servo motor. The diversion plate is rotatable relative to the connecting box. The left end of the connecting box is connected to the circulation pipe, the right end of the connecting box is connected to the water inlet of the inner pipe, the top left end of the connecting box is connected to a drain outlet, and the top right end of the connecting box is connected to a filling port.

[0009] Preferably, the outer wall of the ion nitriding furnace is provided with two or more sets of observation windows, a nitrogen inlet is provided at the bottom of the outer wall of the ion nitriding furnace, an ammonia inlet is provided to the right of the nitrogen inlet, a vacuum extraction port is provided to the right of the ammonia inlet, and four sets of lifting lugs are fixedly installed on the top of the ion nitriding furnace.

[0010] Preferably, a sealing cover is movably installed on the top of the ion nitriding furnace, a lifting ring and a waste gas pipe are fixedly installed on the top of the sealing cover, and an exhaust hole is fixedly installed on the bottom of the sealing cover, with the exhaust hole and the steam hole corresponding one-to-one.

[0011] Preferably, two sets of electrode heaters are fixedly installed on the top of the heating box, and both sets of electrode heaters are detachable.

[0012] Preferably, a rectangular groove is formed on the top of the ion nitriding furnace, and a handrail is movably installed at the corresponding position of the sealing cover and the rectangular groove, and the handrail is detachable.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through a thermostatic tube, a circulation device, and a diversion device, can maintain the temperature of the ion nitriding furnace within a set temperature under the action of water circulation. When the heating temperature of the ion nitriding furnace is too high, the servo motor controls the diversion plate to achieve external circulation of the water in the thermostatic tube. The water in the thermostatic tube flows through the external radiator for cooling treatment. Cold water enters the thermostatic tube through the filling port and cools down the furnace temperature by circulating the water in the inner wall of the ion nitriding furnace jacket. When the temperature inside the ion nitriding furnace needs to be maintained, the servo motor controls the diversion plate to achieve internal circulation. At the same time, the electrode heater works to heat the water source inside the heating box. Because the diversion plate prevents the filling port and drain port from flowing, the water inside the thermostatic tube cannot circulate externally, thus achieving heat preservation and heating to maintain the temperature inside the ion nitriding furnace. The water circulation system improves the heating efficiency of the ion nitriding furnace during the heating process.

[0015] 2. This utility model can also indirectly achieve heat preservation and heating measures through steam holes. When it is necessary to maintain the current temperature inside the furnace or to raise the temperature, the handle can be held and the sealing cover can be rotated to block the exhaust hole. The steam generated by the thermostatic tube is stored inside the jacket, maintaining the temperature and reducing the rate of temperature loss. Water vapor is effectively used for constant temperature control. When the temperature is too high or it is necessary to lower the temperature, the handle can be rotated to discharge the water vapor inside the jacket of the ion nitriding furnace, releasing the stored high-pressure water vapor to reduce the heat preservation measures. When the water vapor in the jacket is released, it also increases the heat dissipation effect of the ion nitriding furnace. The rational use of water vapor reduces energy consumption and lowers the processing cost. Attached Figure Description

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the isometric view structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure from the left side of this utility model;

[0019] Figure 3 This is a partial half-section diagram of the novel circulation device of this utility model;

[0020] Figure 4 This is a schematic diagram of the sandwich structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the thermostatic tube structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the diversion device of this utility model;

[0023] Figure 7 This is a cross-sectional view of the diversion device of this utility model;

[0024] Figure 8 This is a schematic diagram of the flow divider structure of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Ion Nitriding Furnace; 2. Observation Window; 3. Sealing Cover; 4. Lifting Ring; 5. Exhaust Gas Pipe; 6. Exhaust Hole; 7. Thermostatic Pipe; 8. Water Inlet; 9. Water Outlet; 10. Circulation Pipe; 11. Connection Box; 12. Drainage Outlet; 13. Filling Port; 14. Inspection Cover; 15. Screw; 16. Handrail; 17. Diverter Plate; 18. Nitrogen Inlet; 19. Ammonia Inlet; 20. Vacuum Extraction Port; 21. Lifting Ear; 24. Jacket; 25. Heating Box; 26. Diverter Box; 27. Steam Hole; 101. Water Pump; 201. Steering Motor; 301. Electrode Heater; 401. Circulation Device; 501. Diverter Device. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings (1-5) of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0028] Example 1

[0029] Please see the attached figure. Figure 1 Appendix Figure 4 and attached Figure 3 As shown, this utility model provides a technical solution: a precision temperature-controlled ion nitriding furnace, including an ion nitriding furnace 1, a heating box 25, and a distribution box 26. The heating box 25 is installed at the bottom of the outer wall of the ion nitriding furnace 1. The distribution box 26 is fixedly installed on the right side of the heating box 25. A constant temperature tube 7 is sleeved on the outer wall of the inner jacket 24 of the ion nitriding furnace 1. A steam hole 27 is opened at the top of the constant temperature tube 7. A water outlet 9 is opened at the bottom left side of the constant temperature tube 7 and is connected to the heating box 25. A water inlet 8 is opened at the bottom right side of the constant temperature tube 7 and is connected to the distribution box 26. A circulation device 401 is connected to the left side of the heating box 25. Two sets of electrode heaters 301 are fixedly installed at the top of the heating box 25. Both sets of electrode heaters 301 are detachable.

[0030] As attached Figure 2 Appendix Figure 5 and attached Figure 3 As shown, the circulation device 401 includes a water pump 101. The right end of the water pump 101 is connected to the heating box 25. A circulation pipe 10 is connected to the outer wall of the water pump 101. The other end of the circulation pipe 10 is connected to the diversion box 26. A maintenance cover 14 is installed on the top of the diversion box 26. A diversion device 501 is installed inside the diversion box 26. The maintenance cover 14 is fixedly installed on the top of the diversion box 26 by screws 15. The maintenance cover 14 is removable.

[0031] As attached Figure 6 Appendix Figure 7 and attached Figure 8 As shown, the diversion device 501 includes a connecting box 11 and a servo motor 201. The servo motor 201 is fixedly installed on the outer wall of the diversion box 26. The servo motor 201 is detachable. The output shaft of the servo motor 201 passes through the connecting box 11. A diversion plate 17 is fixedly installed at the end of the output shaft of the servo motor 201. The diversion plate 17 is rotatable relative to the connecting box 11. The left end of the connecting box 11 is connected to the circulation pipe 10. The right end of the connecting box 11 is connected to the water inlet 8 of the inner pipe. The top left end of the connecting box 11 is connected to the drain outlet 12. The top right end of the connecting box 11 is connected to the filling port 13.

[0032] As attached Figure 2 As shown, the outer wall of the ion nitriding furnace 1 is provided with two or more sets of observation windows 2, the bottom of the outer wall of the ion nitriding furnace 1 is provided with a nitrogen inlet 18, the right side of the nitrogen inlet 18 is provided with an ammonia inlet 19, the right side of the ammonia inlet 19 is provided with a vacuum extraction port 20, and the top of the ion nitriding furnace 1 is fixedly installed with four sets of lifting lugs 21.

[0033] One specific application of this embodiment is as follows: Before use, the present invention connects the water inlet pipe and the radiator to prevent accidents during use. When the temperature inside the ion nitriding furnace 1 needs to be raised or maintained, water flows from the filling port 13 through the inlet 8, the constant temperature pipe 7, the outlet 9, and the heating box 25 under the action of the water pump 101. At this time, the water is heated by the electrode heater 301 inside the heating box 25. Finally, under the action of the water pump 101, it flows through the circulation pipe 10 to the connecting box 11. At this time, the servo motor 201 starts to control the diversion plate 17 to rotate 90 degrees clockwise. The diversion plate 17 blocks the filling port 13 and the drain port 12 at the top of the connecting box 11, preventing the water from flowing. When the circulation pipe 10 and the water inlet 8 are connected, water flows in the pipe to form an internal circulation. When the temperature inside the ion nitriding furnace 1 is too high, the servo motor 201 controls the flow divider plate 17 to rotate 90 degrees clockwise to open the filling port 13 and the drain port 12. At this time, the electrode heater 301 is turned off and no longer heats the water source. The circulation pipe 10 is connected to the drain port 12, and the filling port 13 is connected to the water inlet 8. The circulation pipe 10 and the water inlet 8 are in a closed state. At this time, under the action of the water pump 101, the water inside the circulation pipe 10 flows to the drain port 12 for heat dissipation. The water source in the filling port 13 flows to the constant temperature pipe 7 to cause the temperature inside the furnace to drop, forming an external circulation to cool the furnace.

[0034] Example 2

[0035] Based on Example 1, a precision temperature-controlled ion nitriding furnace includes an ion nitriding furnace 1, a heating box 25, and a distribution box 26. The heating box 25 is installed at the bottom of the outer wall of the ion nitriding furnace 1. The distribution box 26 is fixedly installed on the right side of the heating box 25. A thermostatic tube 7 is sleeved on the outer wall of the inner jacket 24 of the ion nitriding furnace 1. A steam hole 27 is opened at the top of the thermostatic tube 7. A water outlet 9 is opened at the bottom left side of the thermostatic tube 7 and is connected to the heating box 25. A water inlet 8 is opened at the bottom right side of the thermostatic tube 7 and is connected to the distribution box 26. A circulation device 401 is connected to the left side of the heating box 25. Two sets of electrode heaters 301 are fixedly installed at the top of the heating box 25. Both sets of electrode heaters 301 are detachable.

[0036] As attached Figure 2 and attached Figure 3 As shown, a sealing cover 3 is movably installed on the top of the ion nitriding furnace 1. A lifting ring 4 and an exhaust pipe 5 are fixedly installed on the top of the sealing cover 3. An exhaust hole 6 is fixedly installed at the bottom of the sealing cover 3. The exhaust hole 6 and the steam hole 27 correspond one-to-one. A rectangular groove is opened on the top of the ion nitriding furnace 1. A handrail 16 is movably installed at the corresponding position of the sealing cover 3 and the rectangular groove. The handrail 16 is detachable.

[0037] In this embodiment, since water flows through the thermostatic tube 7, the water that absorbs the temperature inside the furnace or is heated by the electrode heater 301 will form water vapor. Since water vapor has high utilization value, by opening a steam hole 27 at the bend at the top of the thermostatic tube 7, the water vapor can be stored inside the jacket 24 for reasonable utilization. The stored water vapor brings great benefits during internal circulation, which can reduce energy consumption, transfer heat to the furnace wall to maintain or increase the furnace temperature, and reduce the rate of temperature loss. When the ion nitriding furnace 1 is not in use or the furnace temperature needs to be reduced, the handle 16 can be rotated to connect the exhaust hole 6 with the steam hole 27. At this time, the high-pressure water vapor inside the jacket 24 is discharged, and the release of high-pressure water vapor causes the furnace body to lose some of its heat preservation measures, thereby increasing the heat dissipation effect of the furnace body.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A precision temperature-controlled ion nitriding furnace, comprising an ion nitriding furnace (1), a heating chamber (25), and a diversion chamber (26), characterized in that: A heating box (25) is installed at the bottom of the outer wall of the ion nitriding furnace (1). A diversion box (26) is fixedly installed on the right side of the heating box (25). A thermostatic tube (7) is sleeved on the outer wall of the inner jacket (24) of the ion nitriding furnace (1). A number of steam holes (27) are opened at the top of the thermostatic tube (7). A water outlet (9) is opened on the left side of the bottom of the thermostatic tube (7). The water outlet (9) is connected to the heating box (25). A water inlet (8) is opened on the right side of the bottom of the thermostatic tube (7). The water inlet (8) is connected to the diversion box (26). A circulation device (401) is connected to the left side of the heating box (25).

2. The precision temperature-controlled ion nitriding furnace according to claim 1, characterized in that: The circulation device (401) includes a water pump (101), the right end of which is connected to the heating box (25), a circulation pipe (10) is connected to the outer wall of the water pump (101), the other end of which is connected to the diversion box (26), a maintenance cover (14) is installed on the top of the diversion box (26), and a diversion device (501) is installed inside the diversion box (26).

3. The precision temperature-controlled ion nitriding furnace according to claim 2, characterized in that: The diversion device (501) includes a connecting box (11) and a servo motor (201). The servo motor (201) is fixedly installed on the outer wall of the diversion box (26). The servo motor (201) is detachable. The output shaft of the servo motor (201) passes through the connecting box (11). A diversion plate (17) is fixedly installed at the end of the output shaft of the servo motor (201). The diversion plate (17) is rotatable relative to the connecting box (11). The left end of the connecting box (11) is connected to the circulation pipe (10). The right end of the connecting box (11) is connected to the water inlet (8) of the inner pipe. The top left end of the connecting box (11) is connected to a drain outlet (12). The top right end of the connecting box (11) is connected to a filling port (13).

4. The precision temperature-controlled ion nitriding furnace according to claim 1, characterized in that: The outer wall of the ion nitriding furnace (1) is provided with two or more sets of observation windows (2), the bottom of the outer wall of the ion nitriding furnace (1) is provided with a nitrogen inlet (18), the right side of the nitrogen inlet (18) is provided with an ammonia inlet (19), the right side of the ammonia inlet (19) is provided with a vacuum extraction port (20), and the top of the ion nitriding furnace (1) is fixedly installed with four sets of lifting lugs (21).

5. The precision temperature-controlled ion nitriding furnace according to claim 4, characterized in that: The ion nitriding furnace (1) is movably fitted with a sealing cover (3), and a lifting ring (4) and a waste gas pipe (5) are fixedly installed on the top of the sealing cover (3). An exhaust hole (6) is fixedly installed at the bottom of the sealing cover (3), and the exhaust hole (6) and the steam hole (27) correspond one-to-one.

6. The precision temperature-controlled ion nitriding furnace according to claim 1, characterized in that: Two sets of electrode heaters (301) are fixedly installed on the top of the heating box (25), and both sets of electrode heaters (301) are detachable.

7. A precision temperature-controlled ion nitriding furnace according to claim 2, characterized in that: The inspection cover (14) is fixedly installed on the top of the distributor box (26) by screws (15), and the inspection cover (14) is removable.

8. A precision temperature-controlled ion nitriding furnace according to claim 5, characterized in that: The top of the ion nitriding furnace (1) has a rectangular groove, and a handrail (16) is movably installed at the corresponding position of the sealing cover (3) and the rectangular groove. The handrail (16) is detachable.

Images