Uniform-temperature heating system for vacuum degreasing furnace

Abstract

The utility model discloses a uniform-temperature heating system for a vacuum degreasing furnace, which comprises a temperature measuring module, a control module and a plurality of controllable heating branches, and the temperature measuring module and the controllable heating branches are electrically connected with the control module; wherein the temperature measuring module comprises a plurality of temperature sensors, and the plurality of temperature sensors are respectively arranged on different inner side walls in the vacuum degreasing furnace and are used for measuring the gas temperature in the surface area of the corresponding inner side wall in the vacuum degreasing furnace; the controllable heating branch comprises a power adjusting module and a heating module, the power adjusting module is electrically connected with the heating module, and the power adjusting module is in electric signal connection with the control module; the heating modules of the plurality of controllable heating branches are respectively arranged on different inner side walls in the vacuum degreasing furnace to form a heating field. The uniform-temperature heating system can control the temperature of the vacuum degreasing furnace in a balanced manner, each position of a product is uniformly heated, the degreasing effect is good, and the problems of product color change and hydrophilic layer failure caused by local over-temperature of the product are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a temperature-averaging heating system for a vacuum degreasing furnace. Background Art

[0002] The vacuum degreasing furnace is a device used for heat treatment and cleaning of parts. Its working principle is based on heating the parts to a high temperature in a vacuum environment to volatilize and evaporate the impurities on the surface and inside, thereby achieving the effect of cleaning and removing gas.

[0003] Specifically, the vacuum degreasing furnace uses a resistance heater for heating. Under a vacuum environment, the parts to be processed are placed in the processing chamber inside the heater. The heater will generate high temperature and heat the parts to the target temperature. When the temperature of the parts reaches the target value, the degreasing process begins. At this time, the vacuum pump exhausts the gas inside the processing chamber to form a vacuum environment, so that the impurities on the surface and inside of the parts evaporate. The volatile impurities are discharged by the vacuum pump to ensure that the environment in the processing chamber remains in a vacuum state. The key to the entire degreasing process is to maintain a vacuum environment, which can be achieved by strengthening the vacuum pump's exhaust capacity and reducing the gas pressure in the processing chamber. After a period of degreasing treatment, the parts to be processed will achieve the expected cleanliness and gas removal effect. In general, the working principle of the vacuum degreasing furnace is the three key steps of base heating, degreasing and vacuum environment maintenance. Through the synergistic effect of these steps, efficient cleaning and gas removal of parts can be achieved.

[0004] However, the heater in the vacuum degreasing furnace will have the problem of uneven heating process when heating the product, resulting in uneven heating of different parts of the product, causing local overheating of the product, resulting in discoloration of the product and failure of the hydrophilic layer. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a temperature-uniform heating system for a vacuum degreasing furnace to solve the technical problems raised in the background technology.

[0006] A temperature-averaging heating system for a vacuum degreasing furnace comprises a temperature measuring module, a control module and a plurality of controllable heating branches, wherein the temperature measuring module and the plurality of controllable heating branches are electrically connected to the control module; wherein:

[0007] The temperature measurement module includes a plurality of temperature sensors, which are respectively arranged on different inner walls of the vacuum degreasing furnace and are used to measure the gas temperature in the corresponding inner wall surface area of ​​the vacuum degreasing furnace;

[0008] The controllable heating branch includes a power regulating module and a heating module, the power regulating module is electrically connected to the heating module, and the power regulating module is electrically connected to the control module;

[0009] The heating modules of the plurality of controllable heating branches are respectively arranged on different inner walls of the vacuum degreasing furnace to form a heating field.

[0010] Further, the power regulation module includes a three-phase thyristor and an AC-to-DC transformer, the primary side of the AC-to-DC transformer is connected to the output end of the three-phase thyristor, and the secondary side of the AC-to-DC transformer is connected to the heating module;

[0011] The input end of the three-phase thyristor is connected to a three-phase power supply;

[0012] The control end of the three-phase thyristor is electrically connected to the control module.

[0013] Furthermore, a fuse is connected in series to the input end of the three-phase thyristor.

[0014] Furthermore, the control module, three-phase thyristor, fuse and AC-DC transformer are all arranged in a distribution box, and the distribution box has four independent installation compartments, and the control module, three-phase thyristor, fuse and AC-DC transformer are respectively arranged in corresponding installation compartments.

[0015] Furthermore, the fuse and the secondary side of the AC-DC transformer are both connected in series with industrial sockets, and the industrial sockets are arranged on the box body of the distribution box;

[0016] The heating module is connected in series with an industrial plug.

[0017] Furthermore, a radiator is arranged in the distribution box, and the radiator includes a substrate and heat dissipation fins integrally arranged on a plate surface on one side of the substrate, and the three-phase thyristor is bonded to the plate surface on the other side of the substrate through thermal conductive silicone grease.

[0018] Furthermore, the distribution box is provided with a cooling fan opposite to the cooling fins.

[0019] Furthermore, the heating module is an electric heating belt, and the electric heating belt is extended in a circuitous manner or in a vortex manner along the inner wall surface of the vacuum degreasing furnace to form a heating field.

[0020] Furthermore, the control module is a PLC controller.

[0021] The beneficial effects of the utility model are embodied in:

[0022] The utility model provides a uniform temperature heating system for a vacuum degreasing furnace. After the heating module covers the inner wall of the vacuum degreasing furnace, when heating the product inside the vacuum degreasing furnace, the temperature of the gas in the vacuum degreasing furnace is monitored in real time through the temperature measuring module and the temperature is fed back to the control module. The control module can reduce the heating power of the area with faster temperature rise, reduce the heating power of the heating module in this area, and achieve local low heat output; increase the heating power of the area with slower temperature rise, increase the power of the heating module in this area, and achieve local high heat output, forming a balanced temperature control, uniformly heating each position of the product, and achieving a good degreasing effect, thereby avoiding the problem of local overheating of the product causing product discoloration and failure of the hydrophilic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0024] Figure 1 A structural block diagram of a temperature uniform heating system for a vacuum degreasing furnace provided in an embodiment of the utility model;

[0025] Figure 2 A circuit diagram of a controllable heating branch provided in an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the structure of the distribution box provided in the embodiment of the utility model Figure 1 ;

[0027] Figure 4 A schematic diagram of the structure of the distribution box provided in the embodiment of the utility model Figure 2 ;

[0028] Figure 5 A schematic diagram of the structure of a radiator provided in an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the first layout of the electric heating belt provided in the embodiment of the utility model;

[0030] Figure 7 A schematic diagram of the second layout of the electric heating belt provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 and Figure 2 As shown, the utility model provides a uniform temperature heating system for a vacuum degreasing furnace, including a temperature measuring module, a control module and a plurality of controllable heating branches, and the temperature measuring module and the plurality of controllable heating branches are electrically connected to the control module. Among them, the temperature measuring module includes a plurality of temperature sensors PT, and the plurality of temperature sensors PT are respectively arranged on different inner walls of the vacuum degreasing furnace, and are used to measure the gas temperature in the corresponding inner wall surface area of ​​the vacuum degreasing furnace. The controllable heating branch includes a power regulating module and a heating module, and the power regulating module is electrically connected to the heating module, and the power regulating module is electrically signal connected to the control module. The heating modules of the plurality of controllable heating branches are respectively arranged on different inner walls of the vacuum degreasing furnace to form a heating field, and the heating modules are electrically heated after being powered on. The control module can adopt a PLC controller.

[0035] Specifically, Figure 2 As shown, the power regulation module includes a three-phase thyristor SCR and an AC-DC transformer T, the primary side of the AC-DC transformer T is connected to the output end of the three-phase thyristor SCR, and the secondary side of the AC-DC transformer T is connected to the heating module; the input end of the three-phase thyristor SCR is connected to the three-phase power supply; the control end of the three-phase thyristor SCR is electrically connected to the control module. The control module adjusts the heating power of the controllable heating branch through the three-phase thyristor SCR. In order to protect the three-phase thyristor SCR from overcurrent, a fuse FU is connected in series to the input end of the three-phase thyristor SCR.

[0036] In this embodiment, the control module, the three-phase thyristor SCR, the fuse FU and the AC to DC transformer T are all arranged in the following manner: Figure 3 and Figure 4 The distribution box 101 shown has a high degree of modularization, is protected by the distribution box 101, and is more convenient to install in the factory. The distribution box 101 has four independent installation compartments 102, and the control module, three-phase thyristor SCR, fuse FU and AC to DC transformer T are respectively arranged in corresponding installation compartments 102 to avoid mutual interference.

[0037] In addition, the fuse FU and the secondary side of the AC-DC transformer T are both connected in series with an industrial socket 103, which is arranged on the box body of the distribution box 101. The heating module is connected in series with an industrial plug, and the heating module is pluggably connected to the secondary side of the corresponding AC-DC transformer T through the industrial plug, which is convenient and quick during on-site arrangement.

[0038] Furthermore, a radiator 104 is provided in the distribution box 101, and the radiator 104 is made of aluminum. Figure 5 As shown, the heat sink 104 includes a substrate and a heat dissipation fin integrally arranged on one side of the substrate, and the three-phase thyristor 105 is attached to the other side of the substrate through thermal conductive silicone grease. A heat dissipation fan 106 opposite to the heat dissipation fin is arranged on the distribution box 101, and the heat dissipation fan 106 accelerates the air flow around the heat dissipation fin, improves the heat dissipation efficiency, and better dissipates the heat of the three-phase thyristor 105, which helps to maintain the stable operation of the thyristor and prolong its service life.

[0039] In this embodiment, the heating module adopts an electric heating belt 107, and the electric heating belt 107 is extended along the inner wall surface of the vacuum degreasing furnace in a circuitous manner or in a vortex to form a heating field, such as Figure 6 and Figure 7 Heat the product as shown.

[0040] In summary, the utility model provides a uniform temperature heating system for a vacuum degreasing furnace. After the heating module covers the inner wall of the vacuum degreasing furnace, when heating the product inside the vacuum degreasing furnace, the temperature of the gas in the vacuum degreasing furnace is monitored in real time through the temperature measuring module and the temperature is fed back to the control module. The control module can reduce the heating power of the area with faster temperature rise, reduce the heating power of the heating module in this area, and achieve local low heat output; increase the heating power of the area with slower temperature rise, increase the power of the heating module in this area to achieve local high heat output, form a balanced temperature control, heat each position of the product evenly, and achieve a good degreasing effect, thereby avoiding the problem of local overheating of the product causing product discoloration and failure of the hydrophilic layer.

[0041] The products provided in the embodiments of the present invention are briefly described. For matters not mentioned in the embodiments, reference may be made to the corresponding contents in the aforementioned embodiments.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A uniform temperature heating system for a vacuum degreasing furnace, characterized in that: It includes a temperature measurement module, a control module and a plurality of controllable heating branches, wherein the temperature measurement module and the plurality of controllable heating branches are electrically connected to the control module; wherein, The temperature measurement module includes a plurality of temperature sensors, which are respectively arranged on different inner walls of the vacuum degreasing furnace and are used to measure the gas temperature in the corresponding inner wall surface area of ​​the vacuum degreasing furnace; The controllable heating branch includes a power regulating module and a heating module, the power regulating module is electrically connected to the heating module, and the power regulating module is electrically connected to the control module; The heating modules of the plurality of controllable heating branches are respectively arranged on different inner walls of the vacuum degreasing furnace to form a heating field.

2. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 1, characterized in that: The power regulation module includes a three-phase thyristor and an AC-to-DC transformer, the primary side of the AC-to-DC transformer is connected to the output end of the three-phase thyristor, and the secondary side of the AC-to-DC transformer is connected to the heating module; The input end of the three-phase thyristor is connected to a three-phase power supply; The control end of the three-phase thyristor is electrically connected to the control module.

3. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 2, characterized in that: A fuse is connected in series to the input end of the three-phase thyristor.

4. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 3, characterized in that: The control module, three-phase thyristor, fuse and AC-DC transformer are all arranged in a distribution box (101), and the distribution box (101) has four independent installation compartments (102). The control module, three-phase thyristor, fuse and AC-DC transformer are respectively arranged in corresponding installation compartments (102).

5. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 4, characterized in that: The fuse and the secondary side of the AC-DC transformer are both connected in series with an industrial socket (103), and the industrial socket (103) is arranged on the box body of the distribution box (101); The heating module is connected in series with an industrial plug.

6. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 4, characterized in that: A heat sink (104) is arranged in the distribution box (101), the heat sink (104) comprising a base plate and heat dissipation fins integrally arranged on a plate surface on one side of the base plate, and the three-phase thyristor (105) is arranged in contact with a plate surface on the other side of the base plate via thermal conductive silicone grease.

7. A temperature uniform heating system for a vacuum degreasing furnace as claimed in claim 6, characterized in that: The distribution box (101) is provided with a cooling fan (106) opposite to the cooling fins.

8. The temperature uniform heating system for a vacuum degreasing furnace according to claim 1, characterized in that: The heating module is an electric heating belt (107), and the electric heating belt (107) is arranged to extend in a circuitous manner or in a spiral manner along the inner wall surface of the vacuum degreasing furnace to form a heating field.

9. The temperature uniform heating system for a vacuum degreasing furnace according to claim 1, characterized in that: The control module is a PLC controller.

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