Sintering furnace system

Abstract

According to the sintering furnace system, the electronic pressure gauge is arranged between the nitrogen supply device and the furnace body, and the electronic pressure gauge can detect the nitrogen flow between the nitrogen supply device and the furnace body. A first pneumatic valve and a first controller are arranged between the hydrogen supply device and the furnace body, and the first controller is in communication connection with the electronic pressure gauge. When the pressure value of the nitrogen is abnormal, the electronic pressure gauge can detect the abnormal flow of the nitrogen and transmit an abnormal signal to the first controller, and the first controller can automatically and timely cut off the supply of the hydrogen by the first pneumatic valve, so that the potential safety hazard caused by sharp increase of the concentration of the hydrogen in the furnace body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of sintering furnaces, and in particular to a sintering furnace system. Background Art

[0002] The full name of chip capacitors is Multilayer Ceramic Capacitors (MLCC), also known as chip capacitors. MLCC is an essential basic component in the electronics industry and is known as the "rice of the electronics industry." MLCC products require a large amount of N2 and H2 during the sintering process to ensure that the MLCC products meet the electrical characteristics requirements during the sintering process. Since the gases involved in the sintering process are dangerous, there are strict requirements on the amount of gas released and its control. If the N2 supply is insufficient or the gas supply pressure is too low, the H2 concentration inside the equipment will rise sharply. If the N2 pressure cannot be restored immediately, the H2 in the furnace will reach a certain concentration, which can easily lead to serious safety problems, such as explosions. Utility Model Content

[0003] The present application aims to provide a sintering furnace system to improve the explosion problem caused by increased hydrogen concentration in the sintering furnace.

[0004] In a first aspect, an embodiment of the present application provides a sintering furnace system, comprising a hydrogen supply device, a nitrogen supply device, and a furnace body. The hydrogen supply device and the nitrogen supply device are respectively connected to the furnace body, and an electronic pressure gauge is provided between the nitrogen supply device and the furnace body, and the electronic pressure gauge is used to detect the nitrogen flow between the nitrogen supply device and the furnace body. A first pneumatic valve and a first controller are provided between the hydrogen supply device and the furnace body, and the first controller is communicatively connected to the electronic pressure gauge. The first controller is used to control the first pneumatic valve to adjust the hydrogen flow between the hydrogen supply device and the furnace body according to the nitrogen flow detected by the electronic pressure gauge.

[0005] In some embodiments, a second pneumatic valve and a second controller are further included between the nitrogen supply device and the furnace body. The second controller is communicatively connected to the electronic pressure gauge. The second controller is used to control the second pneumatic valve to adjust the nitrogen flow between the nitrogen supply device and the furnace body according to the nitrogen flow detected by the electronic pressure gauge.

[0006] In some embodiments, the sintering furnace system further includes a mixing generator, the mixing generator being connected between the hydrogen supply device and the furnace body, and the mixing generator being connected between the nitrogen supply device and the furnace body. The hydrogen supplied by the hydrogen supply device and the nitrogen supplied by the nitrogen supply device are mixed in the mixing generator.

[0007] In some embodiments, the sintering furnace system includes a first air inlet pipe and a second air inlet pipe, the first air inlet pipe is connected between the nitrogen supply device and the mixing generator, and the electronic pressure gauge is arranged on the first air inlet pipe; the second air inlet pipe is connected between the hydrogen supply device and the mixing generator, and the first pneumatic valve is arranged on the second air inlet pipe.

[0008] In some embodiments, the furnace body includes a shell, a constant temperature box, and a heating component. The constant temperature box and the heating component are arranged in the shell, and the heating component is arranged outside the constant temperature box.

[0009] In some embodiments, the furnace body further comprises a plurality of exhaust sections and a plurality of air inlets, the plurality of exhaust sections and the plurality of air inlets being disposed oppositely on opposite sides of the constant temperature box, the plurality of air inlets being in communication with the mixing generator. Along the length of the furnace body, the plurality of exhaust sections are sequentially spaced apart, and the plurality of air inlets are sequentially spaced apart. Along the radial or width direction of the furnace body, the projections of the exhaust sections and the projections of the air inlets do not overlap.

[0010] In some embodiments, the sintering furnace system further includes an exhaust pipe connected to the plurality of exhaust portions.

[0011] In some embodiments, the electronic pressure gauge includes a dial, a button and a first interface, the first interface is connected to the first air intake pipe, the dial is used to display the pressure value of the nitrogen in the first air intake pipe, and the button is used to set the safety range of the nitrogen pressure value.

[0012] In some embodiments, an alarm is further included between the hydrogen supply device and the furnace body, and the alarm is electrically connected to the first controller.

[0013] In some embodiments, the sintering furnace system further includes a smoke treatment device, and the smoke treatment device is connected to the exhaust pipe.

[0014] Different from the prior art, the embodiment of the present application provides a sintering furnace system, in which an electronic pressure gauge is provided between the nitrogen supply device and the furnace body, and the electronic pressure gauge can detect the nitrogen flow between the nitrogen supply device and the furnace body. A first pneumatic valve and a first controller are provided between the hydrogen supply device and the furnace body, and the first controller is communicatively connected to the electronic pressure gauge. When the nitrogen pressure value is abnormal, the electronic pressure gauge can quickly detect the abnormal nitrogen flow and transmit this abnormal signal to the first controller. The first controller can automatically and promptly control the first pneumatic valve to cut off the hydrogen supply, thereby reducing the safety hazards caused by the sharp increase in hydrogen concentration in the furnace body, and thereby reducing the risk of explosion of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a sintering furnace system provided in an embodiment of the present application.

[0016] Description of reference numerals:

[0017] 100. Sintering furnace system;

[0018] 10. Hydrogen supply device; 11. First pneumatic valve; 12. First controller; 13. Alarm; 14. Second air inlet pipe;

[0019] 20. Nitrogen supply device; 21. Electronic pressure gauge; 22. Second pneumatic valve; 23. Second controller; 24. First air inlet pipe;

[0020] 30. Furnace body; 31. Shell; 32. Constant temperature box; 33. Heating assembly; 34. Exhaust part; 35. Air intake part;

[0021] 40. Mixing generator;

[0022] 50. Exhaust pipe;

[0023] 60. Fume treatment device;

[0024] X, first direction;

[0025] Y, second direction. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0027] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "several" means more than one, unless otherwise specifically defined.

[0028] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive with other embodiments. Furthermore, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

[0030] The sintering process of MLCC products requires large amounts of nitrogen and hydrogen. The nitrogen and hydrogen supply devices in the sintering furnace system are two independent gas supply devices. When an abnormality occurs in the nitrogen supply device or the nitrogen delivery pipeline, the hydrogen supply device will continue to supply normally. Therefore, to prevent a rapid increase in hydrogen concentration, the valve of the hydrogen supply device must be manually closed. However, it takes a certain amount of time from the discovery of the nitrogen supply abnormality to the manual closure of the valve. During this time, the hydrogen supply device continues to supply hydrogen normally, causing the hydrogen concentration to continue to rise. Since the sintering furnace is a high-temperature device that generates heat, if the nitrogen supply cannot be restored within a short period of time (for example, within 10 seconds), there is a risk of explosion in the furnace.

[0031] In the first aspect, the present invention provides a sintering furnace system 100. Figure 1 The sintering furnace system 100 includes a hydrogen supply device 10, a nitrogen supply device 20 and a furnace body 30. The hydrogen supply device 10 and the nitrogen supply device 20 are respectively connected to the furnace body 30.

[0032] The hydrogen supply device 10 is a set of equipment that can be used to store, transport, regulate and control hydrogen to ensure that hydrogen of the required pressure and flow rate can be stably, safely and accurately provided in the required place. During the sintering process of MLCC products, hydrogen can reduce the oxidation reaction occurring in certain parts of the MLCC products, for example, protecting the nickel electrodes from oxidation. It can also promote the volatilization of solvents in MLCC products. Since hydrogen is a flammable and explosive gas, the concentration and operating conditions of hydrogen will be strictly controlled as needed during use to ensure safe use. Moreover, if the hydrogen concentration is too high, the MLCC products will not be completely sintered, resulting in a decrease in the performance of the MLCC products. Therefore, the principle for setting the hydrogen concentration is that the lower the hydrogen concentration, the better, while ensuring that the key parts of the MLCC products are not oxidized. The key parts of the MLCC products can be electrodes.

[0033] The nitrogen supply device 20 is a set of equipment that can be used to store, transport, regulate and control nitrogen to ensure that nitrogen at the required pressure and flow rate can be stably, safely and accurately provided in the required place. During the sintering process of MLCC products, nitrogen is an inert gas that can provide a gas atmosphere for MLCC products during high-temperature sintering, reducing the oxidation corrosion of MLCC products and equipment. To a certain extent, it helps the diffusion and transfer of substances within the ceramic, promotes the sintering process, and makes the microstructure of the ceramic material more uniform and dense. At the same time, the flow of nitrogen helps transfer heat within the furnace body 30, making the heat more evenly distributed within the furnace body 30, thereby improving the sintering quality of MLCC products.

[0034] The furnace body 30 is the main structural component of the sintering furnace and is typically made of high-temperature-resistant materials. This enclosed space provides a stable, high-temperature environment for MLCC products. It also offers excellent thermal insulation, minimizing heat loss and improving energy efficiency, ensuring a smooth sintering process.

[0035] Please refer to Figure 1 , an electronic pressure gauge 21 is provided between the nitrogen supply device 20 and the furnace body 30. The electronic pressure gauge 21 is an instrument that uses electronic technology to measure pressure. A pressure sensor is usually used to sense changes in pressure, and the pressure signal is converted into an electrical signal, which is then processed and displayed by an electronic circuit. Compared with traditional mechanical pressure gauges, the electronic pressure gauge 21 has the advantages of high precision, intuitive readings, easy digital processing and remote transmission. The electronic pressure gauge 21 in the embodiment of the present application is used to detect the nitrogen flow between the nitrogen supply device 20 and the furnace body 30. The flow rate of nitrogen or hydrogen is adjusted according to the pressure value of the nitrogen.

[0036] Please refer to Figure 1 A first pneumatic valve 11 and a first controller 12 are provided between the hydrogen supply device 10 and the furnace body 30, and the first controller 12 is communicatively connected to the electronic pressure gauge 21. The first controller 12 is used to control the first pneumatic valve 11 to adjust the hydrogen flow between the hydrogen supply device 10 and the furnace body 30 according to the nitrogen flow detected by the electronic pressure gauge 21. Specifically, the first controller 12 can receive a nitrogen flow signal transmitted from the electronic pressure gauge 21, and send a control instruction to the first pneumatic valve 11 according to a preset logic and control strategy. The first pneumatic valve 11 adjusts parameters such as the flow, pressure or direction of hydrogen according to the instruction transmitted by the first controller 12. Among them, the supply amount of the nitrogen supply device 20 is much greater than the supply amount of the hydrogen device. Under normal circumstances, after the nitrogen and hydrogen are mixed, the concentration of hydrogen is between 0.1% and 0.3%.

[0037] In some embodiments, please refer to Figure 1An alarm 13 is also included between the hydrogen supply device 10 and the furnace body 30. The alarm 13 is electrically connected to the first controller 12. When the first controller 12 receives an abnormal signal from the electronic pressure gauge 21, it can control the alarm 13 to issue an alarm to remind the staff that there may be a fault or abnormality in the equipment.

[0038] The embodiment of the present application provides a sintering furnace system 100, wherein an electronic pressure gauge 21 is provided between the nitrogen supply device 20 and the furnace body 30. The electronic pressure gauge 21 can detect the nitrogen flow between the nitrogen supply device 20 and the furnace body 30. A first pneumatic valve 11 and a first controller 12 are provided between the hydrogen supply device 10 and the furnace body 30. The first controller 12 is in communication with the electronic pressure gauge 21. When the nitrogen pressure value is abnormal, the electronic pressure gauge 21 can detect the abnormal nitrogen flow and transmit this abnormal signal to the first controller 12. The first controller 12 can automatically and promptly control the first pneumatic valve 11 to cut off the hydrogen supply, thereby reducing the safety risks caused by the rapid increase in hydrogen concentration in the furnace body 30.

[0039] In some embodiments, please refer to Figure 1 A second pneumatic valve 22 and a second controller 23 are further included between the nitrogen supply device 20 and the furnace body 30. The second controller 23 is in communication with the electronic pressure gauge 21. The second controller 23 is configured to control the second pneumatic valve 22 to adjust the nitrogen flow between the nitrogen supply device 20 and the furnace body 30 based on the nitrogen flow rate detected by the electronic pressure gauge 21. The second controller 23 can automatically control the operating state of the second pneumatic valve 22 based on the nitrogen flow rate signal monitored by the electronic pressure gauge 21, and send control instructions to the second pneumatic valve 22 according to preset logic and control strategies. The second pneumatic valve 22 adjusts parameters such as the flow rate, pressure, or direction of the nitrogen gas according to the instructions transmitted from the second controller 23.

[0040] In some embodiments, please refer to Figure 1 The sintering furnace system 100 also includes a mixing generator 40, which can be placed in a fixed cabinet. The mixing generator 40 is connected between the hydrogen supply device 10 and the furnace body 30, and between the nitrogen supply device 20 and the furnace body 30. The hydrogen supplied by the hydrogen supply device 10 and the nitrogen supplied by the nitrogen supply device 20 are mixed in the mixing generator 40. The mixing generator 40 can mix the nitrogen and hydrogen in a specific ratio, reducing the safety risks caused by excessive local hydrogen concentration.

[0041] In some embodiments, please refer to Figure 1The sintering furnace system 100 includes a first air inlet pipe 24 and a second air inlet pipe 14. The first air inlet pipe 24 is connected between the nitrogen supply device 20 and the mixing generator 40 and is used to deliver nitrogen to the mixing generator 40. An electronic pressure gauge 21 is provided on the first air inlet pipe 24 to detect the flow rate of nitrogen. The second air inlet pipe 14 is connected between the hydrogen supply device 10 and the mixing generator 40 and is used to deliver hydrogen to the mixing generator 40. A first pneumatic valve 11 is provided on the second air inlet pipe 14 to control the flow rate of hydrogen in the second air inlet pipe 14.

[0042] In some embodiments, please refer to Figure 1 The furnace body 30 includes a shell 31, a constant temperature box 32 and a heating component 33. The constant temperature box 32 and the heating component 33 are arranged in the shell 31, and the heating component 33 is arranged outside the constant temperature box 32. The furnace body 30 can provide structural support and protection for the constant temperature box 32 and the heating component 33, reducing the interference of the external environment on the furnace, such as dust, moisture, etc. In addition, the shell 31 has a certain thermal insulation performance, which can reduce the heat loss in the furnace and improve energy utilization efficiency. The constant temperature box 32 can provide a stable temperature environment to ensure that the temperature in the furnace is uniform and stable. The heating component 33 is used to provide the required high temperature environment in the furnace and control the heating rate and temperature distribution.

[0043] In some embodiments, please refer to Figure 1 The furnace body 30 further includes a plurality of exhaust sections 34 and a plurality of air inlets 35. The exhaust sections 34 and the air inlets 35 are disposed opposite each other on either side of the constant temperature box 32. The air inlets 35 are connected to the mixing generator 40. The air inlets 35 can be evenly distributed on both sides of the constant temperature box 32 to ensure uniform gas distribution within the furnace body 30. For example, the air inlets 35 are sequentially spaced along the length of the furnace body 30 (the first direction X). The air inlets 35 are connected to the mixing generator 40 to introduce a uniform mixture of nitrogen and hydrogen into the furnace body 30. Similarly, the exhaust sections 34 can be evenly distributed on opposite sides of the air inlets 35 to ensure that sintering fumes are quickly discharged from the furnace body 30. For example, the exhaust sections 34 are sequentially spaced along the length of the furnace body 30 (the first direction X). The projections of the exhaust sections 34 and the air inlets 35 do not overlap along the radial direction or width direction (the second direction Y) of the furnace body 30. The gas entering the furnace body from the air inlet 35 can be reduced and discharged directly from the exhaust part 34 , thereby improving the utilization rate of hydrogen and nitrogen in the furnace body 30 .

[0044] The sintering furnace system 100 further includes an exhaust pipe 50 , which is in communication with the plurality of exhaust sections 34 . The exhaust pipe 50 can collect smoke and dust discharged from the plurality of exhaust sections 34 .

[0045] Furthermore, the sintering furnace system 100 further includes a smoke treatment device 60, which is in communication with the exhaust pipe 50. The smoke treatment device 60 can treat the smoke and residual gas collected by the exhaust portion 34 and then discharge them to reduce air pollution.

[0046] In some embodiments, the electronic pressure gauge 21 includes a dial, a button and a first interface. The first interface is connected to the first air inlet pipe 24. The dial is used to display the pressure value of the nitrogen in the first air inlet pipe 24, and the button is used to set the safety range of the nitrogen pressure value.

[0047] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A sintering furnace system, comprising a hydrogen supply device, a nitrogen supply device and a furnace body, wherein the hydrogen supply device and the nitrogen supply device are respectively connected to the furnace body, characterized in that: An electronic pressure gauge is provided between the nitrogen supply device and the furnace body, and the electronic pressure gauge is used to detect the nitrogen flow between the nitrogen supply device and the furnace body; A first pneumatic valve and a first controller are provided between the hydrogen supply device and the furnace body, and the first controller is communicatively connected with the electronic pressure gauge; The first controller is used to control the first pneumatic valve to adjust the hydrogen flow between the hydrogen supply device and the furnace body according to the nitrogen flow detected by the electronic pressure gauge.

2. The sintering furnace system according to claim 1, characterized in that: A second pneumatic valve and a second controller are further included between the nitrogen supply device and the furnace body. The second controller is communicatively connected to the electronic pressure gauge. The second controller is used to control the second pneumatic valve to adjust the nitrogen flow between the nitrogen supply device and the furnace body according to the nitrogen flow detected by the electronic pressure gauge.

3. The sintering furnace system according to claim 1, characterized in that: The sintering furnace system further includes a mixing generator, the mixing generator being connected between the hydrogen supply device and the furnace body, and the mixing generator being connected between the nitrogen supply device and the furnace body; The hydrogen supplied by the hydrogen supply device and the nitrogen supplied by the nitrogen supply device are mixed in the mixing generator.

4. The sintering furnace system according to claim 3, characterized in that: The sintering furnace system includes a first air inlet pipe and a second air inlet pipe. The first air inlet pipe is connected between the nitrogen supply device and the mixing generator, and the electronic pressure gauge is arranged on the first air inlet pipe; the second air inlet pipe is connected between the hydrogen supply device and the mixing generator, and the first pneumatic valve is arranged on the second air inlet pipe.

5. The sintering furnace system according to claim 3, characterized in that: The furnace body includes a shell, a constant temperature box and a heating component; The constant temperature box and the heating component are arranged in the shell, and the heating component is arranged outside the constant temperature box.

6. The sintering furnace system according to claim 5, characterized in that: The furnace body further includes a plurality of exhaust parts and a plurality of air inlet parts, wherein the plurality of exhaust parts and the plurality of air inlet parts are arranged on both sides of the constant temperature box opposite to each other, and the plurality of air inlet parts are communicated with the mixing generator; Along the length direction of the furnace body, the plurality of exhaust parts are sequentially arranged at intervals, and the plurality of air inlet parts are sequentially arranged at intervals; Along the radial direction or width direction of the furnace body, a projection of the exhaust portion does not overlap with a projection of the air inlet portion.

7. The sintering furnace system according to claim 6, characterized in that: The sintering furnace system further includes an exhaust pipe, which is communicated with the plurality of exhaust parts.

8. The sintering furnace system according to claim 4, characterized in that: The electronic pressure gauge includes a dial, a button and a first interface, the first interface is connected to the first air intake pipe, the dial is used to display the pressure value of the nitrogen in the first air intake pipe, and the button is used to set a safe range of the nitrogen pressure value.

9. The sintering furnace system according to claim 1, characterized in that: An alarm is further included between the hydrogen supply device and the furnace body, and the alarm is electrically connected to the first controller.

10. The sintering furnace system according to claim 1, characterized in that: The sintering furnace system further includes a smoke treatment device, which is communicated with the exhaust pipe.

Images