Tempering holding furnace for watch parts

Abstract

The invention relates to the field of tempering heat preservation of parts, in particular to a tempering heat preservation furnace for watch parts. The furnace comprises a furnace core assembly, a furnace body assembly, an oxygen isolation assembly and a temperature control assembly. A heating cavity of the furnace core assembly is in a vertical cylinder shape, and a plurality of layers of part carrying towers for containing part boxes are arranged in the cavity. The furnace body assembly comprises a shell, a heat preservation interlayer and a heating furnace pipe. The oxygen isolation assembly realizes oxygen isolation through an air supply pipe and an exhaust pipe; and the temperature control assembly can accurately control the temperature. A positioning piece, a sealing structure, a bearing positioning structure, a circulating fan, a heat preservation layer and the like are further arranged. The technical effects that the watch parts can be effectively subjected to tempering heat preservation treatment, oxidation is avoided through good sealing and temperature control, heating is uniform through a circulating fan, meanwhile, the treatment efficiency can be improved through a multi-layer structure, and the tempering quality is guaranteed are achieved.

Description

Technical Field

[0001] This application relates to the field of tempering and heat preservation of parts, and in particular to a tempering and heat preservation furnace for watch parts. Background Technology

[0002] Tempering and heat preservation are crucial processes in the machining of precision watch components, occupying a central position in the entire watchmaking supply chain. Even minute quality differences in tempering and heat preservation can be amplified during subsequent watch assembly, adjustment, and long-term use, affecting the watch's accuracy and durability. In recent years, as consumers' demands for watch quality and functionality have continuously increased, the watch market has ushered in unprecedented development opportunities, making tempering and heat preservation technology increasingly important in the watchmaking industry. It not only affects the quality of individual watch parts but also influences the development level and market competitiveness of the entire watch industry.

[0003] In the tempering and heat preservation treatment of watch parts using related technologies, ordinary tempering furnaces are typically used to eliminate post-quenching internal stress, stabilize the metal structure and dimensions, and improve the toughness of the parts. These furnaces generally use simple resistance wire heating, lacking precise temperature control methods, and rely solely on the operator's experience to roughly judge and adjust the temperature. For sealing, they rely solely on ordinary caps and gaskets, making it difficult to create a stable vacuum environment. Furthermore, the placement of parts lacks a scientific and rational layout plan; they are simply piled together haphazardly. Moreover, creating a vacuum often requires complex equipment and cumbersome operating procedures, increasing production costs and operational difficulty.

[0004] However, these existing conventional techniques have significant drawbacks. Low temperature control precision easily leads to uneven temperature distribution within the furnace, causing inconsistent heating of parts during tempering and resulting in dimensional deformation and uneven hardness. Poor sealing not only fails to effectively maintain the stable oxygen-free environment required for tempering, making parts prone to oxidation, but also causes significant heat loss and low energy efficiency. Inappropriate part layout also exacerbates temperature unevenness, affecting the tempering quality. Furthermore, the complex process of creating an oxygen-free environment increases equipment costs and operational complexity, reducing production efficiency and failing to meet the growing demands of precision watchmaking. Summary of the Invention

[0005] To overcome the above-mentioned technical problems, this application provides a tempering and heat preservation furnace for watch parts.

[0006] The tempering and heat preservation furnace for watch parts provided in this application adopts the following technical solution: A tempering and heat preservation furnace for watch parts includes a furnace core assembly, the furnace core assembly including a heating chamber, a chamber cover and a component carrier tower, the heating chamber having a vertical cylindrical structure, the chamber cover cooperating with an opening at the top of the heating chamber, and the component carrier tower including a plurality of component boxes stacked vertically, the component carrier tower being disposed within the heating chamber; The furnace body assembly includes a shell, an insulation jacket, and a heating furnace liner. The shell is a vertical cylindrical structure with an inner cavity in its cylindrical wall. The insulation jacket is disposed in the inner cavity of the shell's cylindrical wall. The heating cavity is at least partially housed within the shell. The heating furnace liner is disposed within the shell and coaxially arranged with the shell. The heating furnace liner is electrically connected to an external power source. An oxygen isolation assembly includes a supply pipe and an exhaust pipe. The exhaust pipe is disposed on the top of the chamber cover. One end of the exhaust pipe passes through the chamber cover and is connected to the heated chamber. The other end is provided with an exhaust one-way valve. One end of the supply pipe is connected to a fuel storage tank. The other end passes through the bottom of the heated chamber and is connected to the heated chamber. The supply pipe is at least partially housed within the housing. The fuel storage tank stores ethanol or methanol. A temperature control assembly includes a thermocouple, a temperature controller, and a solid-state relay. The thermocouple is fixedly connected to the housing, and the measuring head of the thermocouple passes through the housing and extends into the housing. The temperature controller is electrically connected to an external power source and is signal-connected to the thermocouple. The control circuit of the temperature controller is signal-connected to the input circuit of the solid-state relay, and the output circuit of the solid-state relay is connected in series between the heating furnace chamber and the external power source.

[0007] By adopting the above technical solutions, the heating chamber in the furnace core assembly has a vertical cylindrical structure, which, combined with the component carrier tower that can stack parts boxes, can make reasonable use of space and facilitate batch processing of watch parts. The inner cavity of the furnace shell is equipped with an insulation layer, which helps to reduce heat loss and improve energy utilization. The heating furnace chamber is electrically connected to an external power source to provide stable heating. The oxygen isolation component delivers ethanol or methanol to the heating chamber through a gas supply pipe, which consumes oxygen through combustion or is vaporized and discharged through an exhaust pipe. The exhaust one-way valve prevents air backflow, which can effectively create an oxidation-free tempering environment and avoid oxidation of parts affecting performance. The temperature control component monitors the furnace temperature in real time through thermocouples and transmits the signal to the temperature controller. The temperature controller controls a solid-state relay to adjust the on / off state of the heating furnace chamber, which can accurately control the tempering temperature and ensure tempering quality.

[0008] Optionally, a positioning element is provided between any two adjacent parts boxes. The positioning element includes a limiting ring and a positioning ring located at the center of the inner wall of the limiting ring. The inner diameter of the limiting ring matches the outer diameter of the parts box, and the outer diameter of the limiting ring is smaller than the inner diameter of the heated cavity. The ring width of the positioning ring matches the thickness of the side wall of the parts box, and several ventilation holes are provided at the bottom wall of the parts box.

[0009] By adopting the above technical solution, positioning components are set between two adjacent parts boxes to ensure the correct position and stable stacking of the parts boxes in the heating chamber, preventing displacement or shaking of the parts boxes and ensuring the structural stability of the component carrier tower. The limiting retaining ring and positioning ring are matched with the size of the parts boxes to accurately position the parts boxes, improving the accuracy and consistency of assembly. At the same time, the vent holes set on the bottom wall of the parts boxes facilitate the flow of hot air between the parts boxes, so that the heat is evenly transferred to the parts in each parts box, thereby improving the uniformity and quality of the tempering of the parts, and thus improving the product qualification rate.

[0010] Optionally, the carrier tower includes at least three parts boxes, wherein the parts box located at the top of the carrier tower and the parts box located at the bottom of the carrier tower are used to hold scrapped parts, and the remaining parts boxes are used to hold new parts to be tempered.

[0011] By adopting the above technical solution, scrapped parts are placed in the parts boxes at the top and bottom of the carrier tower, while new parts awaiting tempering are placed in the rest. This forms a heat insulation buffer layer, which reduces temperature fluctuations in the upper and lower areas of the furnace, ensures uniform heating of new parts, lays the foundation for stable tempering, and improves the uniformity and pass rate of parts tempering.

[0012] Optionally, a supporting outer edge is provided on the outer wall of the heated cavity near the top, and a supporting groove is provided at the bottom of the supporting outer edge. A first high-temperature resistant pressure ring is provided in the supporting groove, and the first high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the shell.

[0013] By adopting the above technical solution, a supporting outer edge is set on the outer wall of the heating cavity near the top, and a first high-temperature resistant pressure ring is set in the supporting groove at the bottom of the supporting outer edge, so that it forms a sealed fit with the cavity of the shell, which can effectively reduce the heat loss in the furnace, maintain the temperature stability in the furnace, and thus ensure the tempering and heat preservation effect.

[0014] Optionally, the bottom of the cavity cover is provided with a cover groove, and a second high-temperature resistant pressure ring is provided in the cover groove. The second high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the heated cavity. A sealing sheet is provided below the cavity cover. The sealing sheet is fixedly connected to the cavity cover. A third high-temperature resistant pressure ring is provided on the outer periphery of the sealing sheet. The third high-temperature resistant pressure ring is used to form a sealing fit with the inner wall of the heated cavity. The end of the exhaust pipe away from the exhaust one-way valve passes through the sealing sheet.

[0015] By adopting the above technical solution, the second high-temperature resistant pressure ring in the bottom groove of the cavity cover forms a sealed fit with the cavity opening of the heated cavity, and the third high-temperature resistant pressure ring on the outer periphery of the sealing sheet forms a sealed fit with the inner wall of the heated cavity. This can effectively prevent air from entering the heated cavity, provide an oxygen-free environment for the tempering of watch parts, and prevent the parts from being oxidized. At the same time, this sealing structure can also reduce heat loss, ensure the stability of the furnace temperature, and improve tempering efficiency and quality.

[0016] Optionally, multiple buffer plates are spaced apart below the sealing plate. The outer diameter of the buffer plate is smaller than the inner diameter of the heated cavity, but larger than three-quarters of the inner diameter of the heated cavity. The buffer plate is fixedly connected to the cavity cover.

[0017] By adopting the above technical solutions, the buffer plate can further enhance the sealing of the tempering and holding furnace, prevent external air from entering the heating chamber, maintain the stable vacuum environment required for tempering, and prevent parts from oxidizing. At the same time, the buffer plate can also play a buffering role, reduce the impact of equipment vibration on parts, ensure the stability of parts during the tempering process, and improve the tempering quality.

[0018] Optionally, a furnace liner support ring is provided on the inner wall of the shell near the bottom, and a furnace liner positioning ring is provided above the furnace liner support ring. The furnace liner support ring is used to support the bottom of the heating furnace liner, and the inner diameter of the furnace liner support ring is adapted to the inner diameter of the heating furnace liner. The inner diameter of the furnace liner positioning ring is adapted to the outer diameter of the heating furnace liner. An insulating air layer is formed between the outer wall of the heating furnace liner and the inner wall of the shell.

[0019] By adopting the above technical solution, the furnace shell support ring and furnace shell positioning ring can accurately support and position the heating furnace shell, ensuring the stability of the heating furnace shell installation. At the same time, the heat-insulating air layer formed between the outer wall of the heating furnace shell and the inner wall of the shell avoids large-area contact between the heating furnace shell and the shell, reducing heat exchange efficiency, effectively increasing the heat preservation effect of the equipment, and thus reducing energy consumption.

[0020] Optionally, the furnace body assembly further includes a circulating fan and a drive motor. The circulating fan includes an air cup and blades. The blades are fixedly connected to the inner wall of the air cup. The opening of the air cup faces upwards towards the housing and is coaxially arranged with the housing. The drive motor is located at the bottom of the housing. A coupling is provided on the output shaft of the drive motor. The coupling passes through the bottom of the housing and is fixedly connected to the bottom wall of the air cup.

[0021] By adopting the above technical solution, the circulating fan rotates under the drive of the motor, which can promote the airflow circulation in the furnace, so that the heat is distributed more evenly in the furnace, thereby making the parts in the heating chamber more evenly heated and improving the tempering quality. The opening orientation of the air cup and its coaxial setting with the shell are conducive to guiding the airflow in a specific direction, enhancing the effect of airflow circulation, further optimizing the temperature field distribution in the furnace, and ensuring the stability and consistency of the tempering process.

[0022] Optionally, the furnace body assembly further includes a first insulation layer, which is a vertical cylindrical structure. The outer diameter of the first insulation layer is smaller than the inner diameter of the heating furnace liner, and the inner diameter of the first insulation layer is larger than the outer diameter of the heating cavity. The bottom of the first insulation layer is provided with a turbulence-reducing opening, and the inner wall of the shell is provided with a support groove. The top of the outer wall of the first insulation layer is provided with a mounting bracket that cooperates with the support groove.

[0023] By adopting the above technical solution, the first insulation layer is set between the heating furnace shell and the heating chamber, which can play a role in heat insulation, reduce heat loss from the heating furnace shell to the outside, and improve energy utilization. The bottom turbulence constriction can change the airflow direction, so that the hot air can circulate better in the heating chamber, which helps to optimize the temperature field distribution in the furnace and make the parts heat more evenly. The mounting bracket and the bracket groove cooperate to firmly install the first insulation layer in the shell, ensuring structural stability.

[0024] Optionally, the furnace body assembly further includes a second insulation layer, which is disposed inside the shell near the bottom wall of the shell. Fireproof cotton is filled between the second insulation layer and the bottom wall of the shell. Both the second insulation layer and the fireproof cotton are provided with clearance holes for the coupling to pass through.

[0025] By adopting the above technical solution, a second insulation layer is set inside the shell near the bottom wall, and fireproof cotton is filled between the insulation layer and the bottom wall of the shell. This can further enhance the insulation performance of the furnace body, reduce heat loss from the bottom of the furnace body, and help maintain a stable temperature inside the furnace. At the same time, the second insulation layer and the fireproof cotton are provided with clearance holes for the coupling to pass through, which can ensure that the coupling of the drive motor can pass through smoothly, so that the circulating fan can work normally, ensure a uniform temperature distribution inside the furnace, and improve the tempering quality of watch parts.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The insulation jacket, heating furnace liner, and oxygen isolation components of the furnace body components work together to form a stable oxygen-free environment, preventing parts from oxidizing and solving the problem of poor sealing and inability to maintain a stable oxygen-free environment in existing equipment; 2. The temperature control component can accurately control the tempering temperature, solving the problems of low temperature control accuracy and uneven temperature inside the furnace in existing equipment, ensuring that the parts are heated evenly, and reducing dimensional deformation and uneven hardness. 3. The layout of the parts boxes at the top and bottom of the parts carrier tower to hold scrapped parts, and the rest to hold new parts to be tempered, as well as the positioning parts and ventilation holes between the parts boxes, optimizes the parts layout, solves the problem of uneven temperature caused by unreasonable parts layout in existing equipment, and improves the tempering quality of parts. 4. The circulating fan of the furnace body assembly works in conjunction with the drive motor to create airflow inside the shell, making the temperature inside the furnace more uniform and further ensuring the tempering effect of the parts; 5. The installation of the first and second insulation layers, as well as fireproof cotton, reduces heat loss, improves energy utilization, and solves the problem of low energy utilization in existing equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a tempering and heat preservation furnace for watch parts provided in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the internal structure of a tempering and heat preservation furnace for watch parts provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1-Heating chamber; 101-Outer edge of support; 102-Support groove; 2-Cavity cover; 201-Cover groove; 202-Sealing sheet; 203-Buffer sheet; 3-Parts box; 4-Positioning component; 401-Limiting ring; 402-Positioning ring; 5-Transfer frame; 6-Shell; 601-Furnace shell bearing ring; 602-Furnace shell positioning ring; 603-Frame groove; 7-Insulation interlayer; 8-Heating furnace shell; 9-Gas supply pipe; 10-Exhaust pipe; 11-Thermocouple; 12-Circulating fan; 1201-Air cup; 1202-Blade; 13-Drive motor; 14-Coupling; 15-First insulation layer; 1501-Mounting frame; 16-Second insulation layer; 17-Operating handle; 18-Gas pipe gripper; 19-Equipment box. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses a tempering and heat preservation furnace for watch parts.

[0032] like Figure 1 and Figure 2 As shown, the tempering furnace for watch parts includes a furnace core assembly, a furnace body assembly, an oxygen isolation assembly, and a temperature control assembly. The furnace core assembly is located inside the furnace body assembly, the oxygen isolation assembly is connected to the furnace core assembly, and the temperature control assembly is used to control the temperature inside the furnace body assembly. This achieves precise control of the tempering temperature, effective isolation of oxygen, and improved tempering quality and efficiency of watch parts.

[0033] like Figure 1 and Figure 2 As shown, the furnace core assembly includes a heating chamber 1, a chamber cover 2, and a carrier tower. The heating chamber 1 is a vertical cylindrical structure, characterized by its ability to provide a stable heating space. It can be made of high-temperature resistant stainless steel to ensure its high-temperature resistance and corrosion resistance, or other materials that meet the requirements for high-temperature resistance and corrosion resistance can be used. The chamber cover 2 fits into the opening at the top of the heating chamber 1. The chamber cover 2 can be made of the same stainless steel as the heating chamber 1, its outline is adapted to the opening of the heating chamber 1, and its area is larger than the opening of the heating chamber 1 to ensure complete coverage of the opening. For easy gripping, an operating handle 17 can be provided on the top of the chamber cover 2.

[0034] like Figure 1 and Figure 2 As shown, the component carrier tower includes multiple component boxes 3 stacked vertically. The component boxes 3 are made of stainless steel and are circular in shape to stably hold the watch components. The component boxes 3 can also be made of materials such as aluminum alloy, as long as they meet the requirements for supporting the components and resisting high temperatures. Several ventilation holes are provided on the bottom wall of the component boxes 3 to facilitate the flow of hot air between them, ensuring more even heating of the components. The ventilation holes can be circular or square, etc.

[0035] A positioning element 4 is provided between any two adjacent parts boxes 3. The positioning element 4 includes a limiting retaining ring 401 and a positioning ring 402 located at the center of the inner wall of the limiting retaining ring 401. The inner diameter of the limiting retaining ring 401 matches the outer diameter of the parts box 3, and its outer diameter is smaller than the inner diameter of the heating cavity 1. The material is the same as that of the parts box 3, serving to limit movement and prevent the parts box 3 from shaking. The ring width of the positioning ring 402 matches the thickness of the side wall of the parts box 3, vertically positioning the parts box 3 without obstructing the vent.

[0036] To facilitate the placement or removal of the carrier tower into or from the heating chamber 1, the furnace core assembly may also include a transfer frame 5. The transfer frame 5 includes a support base and a lifting handle fixedly connected to the support base. The support base is an annular base, and the inner diameter of the support base matches the inner diameter of the parts box 3. The outer diameter of the support base is larger than the outer diameter of the limiting retaining ring 401 and smaller than the inner diameter of the heating chamber 1.

[0037] like Figure 1 and Figure 2 As shown, the component carrier tower includes at least three component boxes 3. The component boxes 3 located at the top and bottom of the tower are used to hold scrapped components, while the remaining component boxes 3 are used to hold new components awaiting tempering. This layout utilizes the scrapped components to form a heat-insulating buffer layer, reducing temperature fluctuations between the upper and lower areas of the furnace and ensuring uniform heating of the new components.

[0038] like Figure 1 and Figure 2As shown, the furnace assembly includes a shell 6, an insulation layer 7, and a heating furnace liner 8. The shell 6 is a vertical cylindrical structure with an inner cavity in its wall. The insulation layer 7 is located within this inner cavity. The shell 6 is a 5mm thick sheet metal part, bent and then painted with a dark gray coating. A high-temperature resistant paint can be used for the paint layer. This construction effectively insulates and protects the internal components. The insulation layer 7 is made of asbestos material, providing insulation and reducing heat loss. The heating furnace liner 8 is located inside the shell 6 and coaxially aligned with it. The heating furnace liner 8 is electrically connected to an external power source. It uses two sets of 2.5kW nickel-chromium resistance wires as heating elements, efficiently generating heat. The resistance wires are connected to copper connectors via cold-pressed terminals and wiring terminals. The copper connectors are polished to reduce contact resistance, prevent burnout, and ensure stable continuous heating.

[0039] like Figure 1 and Figure 2 As shown, the oxygen isolation assembly includes a gas supply pipe 9 and an exhaust pipe 10. The exhaust pipe 10 is located on the top of the chamber cover 2, with one end penetrating the chamber cover 2 and connecting to the heated chamber 1, and the other end equipped with an exhaust check valve (not shown in the figure). The exhaust check valve prevents gas backflow. The gas supply pipe 9 delivers fuel to the heated chamber 1 for combustion, venting air to create an oxygen-free environment. One end of the gas supply pipe 9 is connected to a fuel storage tank (not shown in the figure), and the other end penetrates the bottom of the heated chamber 1 and connects to the heated chamber 1. The gas supply pipe 9 is at least partially housed within the housing 6, and a gas pipe gripper 18 can be provided at the portion of the gas supply pipe 9 outside the housing 6 for easy gripping by the operator. The fuel storage tank stores ethanol, and a valve can be provided at the outlet of the fuel storage tank. In addition to ethanol, methanol, propanol, and other environmentally friendly liquid fuels that are easily ignited or vaporized can also be used as fuel.

[0040] like Figure 1 and Figure 2 As shown, a supporting outer edge 101 is provided on the outer wall of the heated cavity 1 near the top. A supporting groove 102 is provided at the bottom of the supporting outer edge 101. A first high-temperature resistant pressure ring is provided in the supporting groove 102. The first high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the shell 6 to prevent heat leakage.

[0041] like Figure 1 and Figure 2As shown, a cover groove 201 is provided at the bottom of the cavity cover 2, and a second high-temperature resistant pressure ring is provided in the cover groove 201. The second high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the heated cavity 1. A sealing sheet 202 is provided below the cavity cover 2, and the sealing sheet 202 is fixedly connected to the cavity cover 2. A third high-temperature resistant pressure ring is provided on the outer periphery of the sealing sheet 202, and the third high-temperature resistant pressure ring is used to form a sealing fit with the inner wall of the heated cavity 1. The end of the exhaust pipe 10 away from the exhaust one-way valve passes through the sealing sheet 202. Multiple buffer sheets 203 are provided at intervals below the sealing sheet 202. The outer diameter of the buffer sheet 203 is smaller than the inner diameter of the heated cavity 1 and larger than three-quarters of the inner diameter of the heated cavity 1. The buffer sheet 203 is fixedly connected to the cavity cover 2.

[0042] like Figure 1 and Figure 2 As shown, a furnace support ring 601 is provided on the inner wall of the shell 6 near the bottom, and a furnace positioning ring 602 is provided above the furnace support ring 601. The furnace support ring 601 is used to support the bottom of the heating furnace 8, and the inner diameter of the furnace support ring 601 is adapted to the inner diameter of the heating furnace 8. The inner diameter of the furnace positioning ring 602 is adapted to the outer diameter of the heating furnace 8. An insulating air layer is formed between the outer wall of the heating furnace 8 and the inner wall of the shell 6, which can further enhance the heat preservation effect.

[0043] like Figure 1 and Figure 2 As shown, the furnace assembly also includes a circulating fan 12 and a drive motor 13. The circulating fan 12 includes an air cup 1201 and blades 1202. The blades 1202 are fixedly connected to the inner wall of the air cup 1201. The opening of the air cup 1201 faces upwards towards the housing 6, and the air cup 1201 is coaxially arranged with the housing 6. The drive motor 13 is located at the bottom of the housing 6. A coupling 14 is provided on the output shaft of the drive motor 13. The coupling 14 passes through the bottom of the housing 6 and is fixedly connected to the bottom wall of the air cup 1201, so that the hot air inside the furnace circulates and improves the temperature uniformity. The drive motor 13 provides power to the fan.

[0044] The furnace body assembly also includes a first insulation layer 15 and a second insulation layer 16. The first insulation layer 15 is a vertical cylindrical structure with an outer diameter smaller than the inner diameter of the heating furnace liner 8 and an inner diameter larger than the outer diameter of the heating chamber 1. The bottom of the first insulation layer 15 has a turbulence-reducing inlet, and the inner wall of the shell 6 has a support groove 603. The top of the outer wall of the first insulation layer 15 has a mounting bracket 1501 that mates with the support groove 603. The first insulation layer 15 can further insulate heat and regulate airflow. The second insulation layer 16 is located inside the shell 6 near the bottom wall of the shell 6. Fireproof cotton is filled between the second insulation layer 16 and the bottom wall of the shell 6. Both the second insulation layer 16 and the fireproof cotton have clearance holes for the coupling 14 to pass through. The second insulation layer 16 and the fireproof cotton can play a role in heat preservation and buffering.

[0045] like Figure 1 and Figure 2 As shown, the temperature control assembly includes a thermocouple 11, a temperature controller, and a solid-state relay. Thermocouple 11 is fixedly connected to the housing 6, and its measuring head penetrates the housing 6 and extends into it. Thermocouple 11 can measure the furnace temperature in real time with an accuracy of ±1℃ and a temperature range of 0-1200℃. The temperature controller is electrically connected to an external power source and has a signal connection with the thermocouple 11. The control circuit of the temperature controller is connected to the input circuit of the solid-state relay, and the output circuit of the solid-state relay is connected in series between the heating furnace chamber 8 and the external power source. Based on the temperature signal fed back by the thermocouple 11, the temperature controller controls the on / off state of the heating furnace chamber 8 through the solid-state relay to achieve precise temperature control. The temperature controller and solid-state relay can be housed inside an equipment box 19, which can be fixedly mounted outside the housing 6.

[0046] The implementation principle of a tempering and heat preservation furnace for watch parts according to an embodiment of this application is as follows: This tempering and heat preservation furnace provides a precise tempering and heat preservation environment for watch parts through the coordinated work of its various components. The reasonable layout and positioning of the furnace core components ensures uniform heating of the parts; the multiple insulation and circulating fan design of the furnace body components improve temperature uniformity and energy utilization, ensuring continuous heating; the oxygen isolation component creates an oxygen-free environment by venting air through fuel combustion, preventing oxidation of the parts; and the temperature control component achieves precise control of the tempering temperature. Compared with existing technologies, this tempering and heat preservation furnace solves problems such as low temperature control accuracy, poor sealing and heat dissipation, unreasonable part layout, and easy burnout of the resistance wire, improving the tempering quality and production efficiency of watch parts and reducing production costs.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tempering and heat preservation furnace for watch parts, characterized in that, include: The furnace core assembly includes a heating chamber (1), a chamber cover (2), and a carrier tower. The heating chamber (1) is a vertical cylindrical structure. The chamber cover (2) is matched with the opening at the top of the heating chamber (1). The carrier tower includes multiple parts boxes (3) stacked vertically. The carrier tower is located inside the heating chamber (1). The furnace body assembly includes a shell (6), an insulation jacket (7), and a heating furnace liner (8). The shell (6) is a vertical cylindrical structure with an inner cavity in the cylindrical wall. The insulation jacket (7) is disposed in the inner cavity of the cylindrical wall of the shell (6). The heating chamber (1) is at least partially housed within the shell (6). The heating furnace liner (8) is disposed within the shell (6) and coaxially arranged with the shell (6). The heating furnace liner (8) is electrically connected to an external power source. An oxygen isolation assembly, comprising a gas supply pipe (9) and an exhaust pipe (10), wherein the exhaust pipe (10) is disposed at the top of the chamber cover (2), one end of the exhaust pipe (10) penetrates the chamber cover (2) and is connected to the heated chamber (1), and the other end is provided with an exhaust one-way valve; one end of the gas supply pipe (9) is connected to a fuel storage tank, and the other end penetrates the bottom of the heated chamber (1) and is connected to the heated chamber (1); the gas supply pipe (9) is at least partially housed within the housing (6); the fuel storage tank stores ethanol or methanol. The temperature control component includes a thermocouple (11), a temperature controller, and a solid-state relay. The thermocouple (11) is fixedly connected to the housing (6), and the measuring head of the thermocouple (11) passes through the housing (6) and extends into the housing (6). The temperature controller is electrically connected to an external power source and is signal-connected to the thermocouple (11). The control circuit of the temperature controller is signal-connected to the input circuit of the solid-state relay, and the output circuit of the solid-state relay is connected in series between the heating furnace chamber (8) and the external power source.

2. The tempering and heat preservation furnace according to claim 1, characterized in that, A positioning element (4) is provided between any two adjacent parts boxes (3). The positioning element (4) includes a limiting ring (401) and a positioning ring (402) located at the center of the inner wall of the limiting ring (401). The inner diameter of the limiting ring (401) matches the outer diameter of the parts box (3). The outer diameter of the limiting ring (401) is smaller than the inner diameter of the heated cavity (1). The ring width of the positioning ring (402) matches the thickness of the side wall of the parts box (3). Several ventilation holes are provided at the bottom wall of the parts box (3).

3. The tempering and heat preservation furnace according to claim 2, characterized in that, The carrier tower includes at least three parts boxes (3), wherein the parts box (3) located at the top of the carrier tower and the parts box (3) located at the bottom of the carrier tower are used to hold scrapped parts, and the remaining parts boxes (3) are used to hold new parts to be tempered.

4. The tempering and heat preservation furnace according to claim 1, characterized in that, The outer wall of the heated cavity (1) is provided with a supporting outer edge (101) near the top. The bottom of the supporting outer edge (101) is provided with a supporting groove (102). A first high-temperature resistant pressure ring is provided in the supporting groove (102). The first high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the shell (6).

5. The tempering and heat preservation furnace according to claim 4, characterized in that, The bottom of the cavity cover (2) is provided with a cover groove (201), and a second high-temperature resistant pressure ring is provided in the cover groove (201). The second high-temperature resistant pressure ring is used to form a sealing fit with the cavity opening of the heated cavity (1). A sealing plate (202) is provided below the cavity cover (2). The sealing plate (202) is fixedly connected to the cavity cover (2). A third high-temperature resistant pressure ring is provided on the outer periphery of the sealing plate (202). The third high-temperature resistant pressure ring is used to form a sealing fit with the inner wall of the heated cavity (1). The end of the exhaust pipe (10) away from the exhaust one-way valve passes through the sealing plate (202).

6. The tempering and heat preservation furnace according to claim 5, characterized in that, Multiple buffer plates (203) are spaced apart below the sealing plate (202). The outer diameter of the buffer plate (203) is smaller than the inner diameter of the heated cavity (1) and larger than three-quarters of the inner diameter of the heated cavity (1). The buffer plate (203) is fixedly connected to the cavity cover (2).

7. The tempering and heat preservation furnace according to claim 1, characterized in that, A furnace support ring (601) is provided on the inner wall of the shell (6) near the bottom. A furnace positioning ring (602) is provided above the furnace support ring (601). The furnace support ring (601) is used to support the bottom of the heating furnace (8). The inner diameter of the furnace support ring (601) is adapted to the inner diameter of the heating furnace (8). The inner diameter of the furnace positioning ring (602) is adapted to the outer diameter of the heating furnace (8). A heat-insulating air layer is formed between the outer wall of the heating furnace (8) and the inner wall of the shell (6).

8. The tempering and heat preservation furnace according to claim 1, characterized in that, The furnace body assembly also includes a circulating fan (12) and a drive motor (13). The circulating fan (12) includes a wind cup (1201) and blades (1202). The blades (1202) are fixedly connected to the inner wall of the wind cup (1201). The opening of the wind cup (1201) faces upwards towards the housing (6), and the wind cup (1201) is coaxially arranged with the housing (6). The drive motor (13) is located at the bottom of the housing (6). A coupling (14) is provided on the output shaft of the drive motor (13). The coupling (14) passes through the bottom of the housing (6) and is fixedly connected to the bottom wall of the wind cup (1201).

9. The tempering and heat preservation furnace according to claim 8, characterized in that, The furnace body assembly also includes a first insulation layer (15), which is a vertical cylindrical structure. The outer diameter of the first insulation layer (15) is smaller than the inner diameter of the heating furnace liner (8), and the inner diameter of the first insulation layer (15) is larger than the outer diameter of the heating chamber (1). The bottom of the first insulation layer (15) is provided with a turbulence-reducing opening. The inner wall of the shell (6) is provided with a support groove (603), and the top of the outer wall of the first insulation layer (15) is provided with a mounting bracket (1501) that cooperates with the support groove (603).

10. The tempering and heat preservation furnace according to claim 8, characterized in that, The furnace body assembly also includes a second insulation layer (16), which is located inside the shell (6) near the bottom wall of the shell (6). Fireproof cotton is filled between the second insulation layer (16) and the bottom wall of the shell (6). Both the second insulation layer (16) and the fireproof cotton are provided with clearance holes for the coupling (14) to pass through.

Images