Carburizing control system of vacuum carburizing furnace

Abstract

The utility model discloses a carburizing control system of a vacuum carburizing furnace, which comprises an acetylene gas storage tank, an acetylene gas filling pipeline arranged on the acetylene gas storage tank, and a first branch pipe and a second branch pipe arranged on the acetylene gas filling pipeline; the nitrogen storage tank is provided with a nitrogen inflation pipeline, and the nitrogen inflation pipeline is connected with a third branch pipe and a fourth branch pipe; the pressure equalizing pipe is arranged among the furnace body, the acetylene gas storage tank and the nitrogen gas storage tank, and the pressure equalizing pipe is communicated with the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe; a first gas inlet pipeline and a second gas inlet pipeline are arranged on the furnace body, a first buffer pipeline and a second buffer pipeline are arranged on the pressure equalizing pipe, the first buffer pipeline is communicated with the first gas inlet pipeline, and the second buffer pipeline is communicated with the second gas inlet pipeline; and manual ball valves are respectively arranged on the acetylene inflation pipeline and the nitrogen inflation pipeline. The problem that the amount of acetylene and nitrogen input into an existing vacuum furnace is difficult to control and is not uniform enough, so that uniform carburization of a workpiece is affected is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vacuum furnaces, and in particular to a carburizing control system of a vacuum carburizing furnace. Background Art

[0002] Carburizing refers to a chemical heat treatment process in which the steel parts are heated and kept warm in a carburizing medium to allow carbon atoms to penetrate into the surface layer in order to increase the carbon content of the surface layer of the steel parts and form a certain carbon concentration gradient, thereby improving the strength, impact toughness and wear resistance of the parts and extending the service life of the parts.

[0003] At present, during the carburizing process, acetylene and nitrogen need to be filled into the vacuum carburizing furnace body to fully ensure the stable progress of the carburizing process. However, when filling acetylene or nitrogen, the amount of acetylene and nitrogen filled cannot be accurately guaranteed, and the input acetylene gas and nitrogen may not be uniform enough, which may affect the stable and uniform carburizing on the workpiece, so that the workpiece that finally completes the carburizing work cannot achieve effective stiffness and strength. Utility Model Content

[0004] The purpose of the present invention is to provide a vacuum carburizing furnace carburizing control system, which solves the problem that the amount of acetylene gas and nitrogen input into the vacuum carburizing furnace is difficult to control, and the amount of acetylene gas and nitrogen input is not uniform, which may affect the uniform carburizing on the workpiece.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a vacuum carburizing furnace carburizing control system, which is used to be arranged on a furnace body and is characterized by comprising:

[0006] An acetylene gas storage tank, wherein the acetylene gas storage tank is provided with an acetylene charging pipeline, and the acetylene charging pipeline is provided with a first branch pipe and a second branch pipe;

[0007] A nitrogen gas storage tank, wherein the nitrogen gas storage tank is provided with a nitrogen charging pipeline, and the nitrogen charging pipeline is connected with a third branch pipe and a fourth branch pipe;

[0008] A pressure equalizing pipe is arranged between the furnace body and the acetylene gas storage tank and the nitrogen gas storage tank, and the pressure equalizing pipe is connected with the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe respectively;

[0009] The furnace body is provided with a first air intake pipeline and a second air intake pipeline, the pressure equalizing pipe is provided with two first buffer pipelines and two second buffer pipelines, the two first buffer pipelines are respectively connected to the first air intake pipeline, and the two second buffer pipelines are connected to the second air intake pipeline;

[0010] The acetylene charging pipeline and the nitrogen charging pipeline are respectively provided with manual ball valves.

[0011] In some embodiments, the pressure equalizing tube is provided with an electric contact pressure gauge and a pressure sensor.

[0012] In some embodiments, a high vacuum shut-off valve is disposed on the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe, respectively, and a flow meter is disposed on the first branch pipe and the second branch pipe, respectively.

[0013] In some embodiments, the acetylene charging pipeline and the nitrogen charging pipeline are respectively provided with pressure regulating valves.

[0014] In some embodiments, filters are respectively provided on the acetylene inflation pipeline and the nitrogen inflation pipeline.

[0015] In some embodiments, rotor flow meters are respectively disposed on the two first buffer lines and the two second buffer lines.

[0016] In some embodiments, the acetylene charging pipeline is connected to an acetylene exhaust pipeline, and the nitrogen charging pipeline is connected to a nitrogen exhaust pipeline. The nitrogen exhaust pipeline and the acetylene exhaust pipeline are respectively provided with pressure switches.

[0017] By adopting the above technical scheme, when acetylene and nitrogen are input into the furnace body, the manual ball valves on the acetylene charging pipeline and the nitrogen charging pipeline can be opened, so that acetylene and nitrogen can enter the pressure equalizing tube and be evenly mixed in the pressure equalizing tube, and then enter the furnace body through the two first buffer pipelines and the second buffer pipeline. In this way, it can be ensured that acetylene and nitrogen can enter the furnace body after being fully mixed and can be maintained in a certain pressure range, and it is also avoided that acetylene and nitrogen are directly charged into the furnace body to cause pressure imbalance, and the charging amount is difficult to control and affects the carburizing process. In addition, in this way, the vacuum degree and temperature in the furnace body can be better controlled to fully carry out the carburizing work.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present disclosure and constitute a part of the specification. They are used to explain the present disclosure together with the following detailed description, but do not constitute a limitation of the present disclosure.

[0020] In the attached picture:

[0021] Figure 1 It is a structural schematic diagram of the overall vacuum carburizing furnace carburizing control system of the utility model;

[0022] Figure 2 The utility model is a control flow diagram of a carburizing control system of a vacuum carburizing furnace.

[0023] Description of reference numerals:

[0024] 1. Furnace body; 11. First air inlet pipeline; 12. Second air inlet pipeline; 2. Acetylene gas storage tank; 21. Acetylene charging pipeline; 22. First branch pipe; 23. Second branch pipe; 3. Nitrogen gas storage tank; 31. Nitrogen charging pipeline; 32. Third branch pipe; 33. Fourth branch pipe; 4. Pressure equalizing pipe; 41. First buffer pipeline; 42. Second buffer pipeline; 43. Electric contact pressure gauge; 44. Pressure sensor; 5. Manual ball valve; 51. Pressure regulating valve; 52. Filter; 6. High vacuum stop valve; 61. Flow meter; 62. Rotor flow meter; 7. Acetylene exhaust pipeline; 71. Nitrogen exhaust pipeline; 72. Pressure switch; 8. Controller. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] The present invention provides a carburizing control system for a vacuum carburizing furnace. The system is used to be arranged on a furnace body of the vacuum carburizing furnace so as to fully input acetylene and nitrogen etc. into the furnace body to ensure that parts are subjected to a stable and uniform carburizing process in the vacuum carburizing furnace.

[0027] like Figure 1 As shown, the carburizing control system of the vacuum carburizing furnace includes an acetylene gas storage tank 2, a nitrogen gas storage tank 3 and a pressure equalizing pipe 4, wherein an acetylene charging pipeline 21 is provided on the acetylene gas storage tank 2, and the acetylene charging pipeline 21 is connected to a first branch pipe 22 and a second branch pipe 23, and a nitrogen charging pipeline 31 is provided on the nitrogen gas storage tank 3, and the nitrogen charging pipeline 31 is connected to a third branch pipe 32 and a fourth branch pipe 33. The pressure equalizing pipe 4 is provided between the furnace body 1 and the acetylene gas storage tank 2 and the nitrogen gas storage tank 3, and the pressure equalizing pipe 4 is respectively connected to the first branch pipe 22, the second branch pipe 23, the third branch pipe 32 and the fourth branch pipe 33. Manual ball valves 5 are fixedly provided on the acetylene charging pipeline 21 and the nitrogen charging pipeline 31, respectively.

[0028] In addition, a first air intake pipeline 11 and a second air intake pipeline 12 are connected to the furnace body 1, and two first buffer pipelines 41 and two second buffer pipelines 42 are connected to the pressure equalizing pipe 4. The two first buffer pipelines 41 are respectively connected to the first air intake pipeline 11, and the two second buffer pipelines 42 are respectively connected to the second air intake pipeline 12.

[0029] By setting the above structure, when acetylene and nitrogen are input into the furnace body 1, the manual ball valve 5 on the acetylene charging pipeline 21 and the nitrogen charging pipeline 31 can be opened, so that acetylene and nitrogen enter the equalizing pipe 4 through the acetylene charging pipeline 21, the nitrogen charging pipeline 31, the first branch pipe 22, the second branch pipe 23, the third branch pipe 32 and the fourth branch pipe 33 respectively, so that the nitrogen and acetylene are evenly mixed in the equalizing pipe 4, and then enter the furnace body 1 through the two first buffer pipelines 41 and the second buffer pipeline 42. In this way, it can be ensured that acetylene and nitrogen can enter the furnace body 1 after being fully mixed, and can be maintained in a certain pressure range, and it is also avoided that acetylene and nitrogen are directly charged into the furnace body 1 to cause pressure imbalance, and the amount of charging is difficult to control and affects the carburizing process. In addition, the vacuum degree and temperature in the furnace body 1 can also be better controlled to fully carry out the carburizing work.

[0030] In some embodiments, Figure 1 As shown, an electric contact pressure gauge 43 and a pressure sensor 44 are respectively provided on the pressure equalizing tube 4 .

[0031] By using the pressure sensor 44, the pressure information in the pressure equalizing tube 4 can be monitored in real time to avoid accidents caused by excessive pressure in the pressure equalizing tube 4. The electric contact pressure gauge 43 can further detect the information in the pressure equalizing tube 4 and issue an early warning to further prevent the risk of explosion.

[0032] In some embodiments, Figure 1 As shown, the first branch pipe 22 , the second branch pipe 23 , the third branch pipe 32 and the fourth branch pipe 33 are respectively provided with a high vacuum stop valve 6 , and the first branch pipe 22 and the second branch pipe 23 are respectively provided with a flow meter 61 .

[0033] By using the setting of the flow meter 61, the amount of acetylene input into the pressure equalizing pipe 4 can be monitored in real time, so that the staff can adjust the flow rate of acetylene output from the first branch pipe 22 and the second branch pipe 23 as needed. By using the setting of the high vacuum stop valve 6, the first branch pipe 22, the second branch pipe 23, the third branch pipe 32 and the fourth branch pipe 33 can be opened and closed as needed, so as to control the input of nitrogen and acetylene into the first branch pipe 22, the second branch pipe 23, the third branch pipe 32 and the fourth branch pipe 33.

[0034] In some embodiments, Figure 1 As shown, pressure regulating valves 51 are respectively provided on the acetylene charging pipeline 21 and the nitrogen charging pipeline 31 .

[0035] In this way, the staff can adjust the pressure of the flow meter 61 in the acetylene filling pipeline 21 and the nitrogen filling pipeline 31 as needed to ensure sufficient output gas while ensuring that the pressure in the acetylene filling pipeline 21 and the nitrogen filling pipeline 31 is not too high to cause danger.

[0036] In addition, if Figure 1 As shown, filters 52 are also provided on the acetylene charging pipeline 21 and the nitrogen charging pipeline 31 respectively.

[0037] By using the filter 52 , a good filtering effect can be formed on the output gas, thereby preventing other pollutants from entering the furnace body 1 and affecting the carburizing result.

[0038] In some embodiments, Figure 1 As shown, rotor flow meters 62 are respectively provided on the two first buffer pipelines 41 and the two second buffer pipelines 42 .

[0039] By using the rotor flow meter 62 , the amount of gas output from the two first buffer pipelines 41 and the two second buffer pipelines 42 can be monitored in real time.

[0040] In some embodiments, Figure 1 As shown, the acetylene exhaust pipeline 7 is connected to the acetylene charging pipeline 21, and the nitrogen exhaust pipeline 71 is connected to the nitrogen charging pipeline 31. Pressure switches 72 are respectively provided on the nitrogen exhaust pipeline 71 and the acetylene exhaust pipeline 7.

[0041] By setting such a structure, when the pressure in the acetylene charging pipeline 21 and the nitrogen charging pipeline 31 is too high, the pressure switch 72 can be opened in real time to release the pressure to avoid the risk of explosion.

[0042] In some embodiments, Figure 1 and Figure 2 As shown, the above-mentioned vacuum carburizing furnace carburizing control system also includes a controller 8, which is electrically connected to the electric contact pressure gauge 43, the pressure sensor 44, the flow meter 61, and the rotor flow meter 62, and is electrically connected to the high vacuum stop valve 6, the pressure regulating valve 51, and the pressure switch 72 respectively.

[0043] By using the setting of the controller 8, it can receive the information detected by the electric contact pressure gauge 43, the pressure sensor 44, the flow meter 61, and the rotor flow meter 62 in real time, and control the operation of the high vacuum stop valve 6, the pressure regulating valve 51, and the pressure switch 72 in real time according to the received information. When the pressure sensor 44 detects that the pressure in the equalizing tube 4 is too high, the controller 8 can receive this information in time, thereby controlling each high vacuum stop valve 6 to reduce the gas flow input into the equalizing tube 4 to avoid excessive pressure in the equalizing tube 4. Or when the flow meter 61 detects that the amount of acetylene gas input is relatively small, the controller 8 can control the pressure regulating valve 51, etc. to increase the amount of acetylene gas output.

[0044] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0046] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A carburizing control system for a vacuum carburizing furnace, used to be arranged on a furnace body, characterized in that: include: An acetylene gas storage tank, wherein the acetylene gas storage tank is provided with an acetylene charging pipeline, and the acetylene charging pipeline is provided with a first branch pipe and a second branch pipe; A nitrogen gas storage tank, wherein the nitrogen gas storage tank is provided with a nitrogen charging pipeline, and the nitrogen charging pipeline is connected with a third branch pipe and a fourth branch pipe; A pressure equalizing pipe is arranged between the furnace body and the acetylene gas storage tank and the nitrogen gas storage tank, and the pressure equalizing pipe is connected with the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe respectively; The furnace body is provided with a first air intake pipeline and a second air intake pipeline, and the pressure equalizing pipe is provided with two first buffer pipelines and two second buffer pipelines, the two first buffer pipelines are respectively connected to the first air intake pipeline, and the two second buffer pipelines are respectively connected to the second air intake pipeline; The acetylene charging pipeline and the nitrogen charging pipeline are respectively provided with manual ball valves.

2. The carburizing control system of the vacuum carburizing furnace according to claim 1, characterized in that: The pressure equalizing tube is provided with an electric contact pressure gauge and a pressure sensor.

3. The carburizing control system of the vacuum carburizing furnace according to claim 1, characterized in that: The first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe are respectively provided with high vacuum stop valves, and the first branch pipe and the second branch pipe are respectively provided with flow meters.

4. The carburizing control system of the vacuum carburizing furnace according to claim 1, characterized in that: The acetylene charging pipeline and the nitrogen charging pipeline are respectively provided with pressure regulating valves.

5. The carburizing control system of the vacuum carburizing furnace according to claim 1, characterized in that: The acetylene charging pipeline and the nitrogen charging pipeline are respectively provided with filters.

6. The carburizing control system of the vacuum carburizing furnace according to claim 1, characterized in that: The two first buffer pipelines and the two second buffer pipelines are respectively provided with rotor flow meters.

7. The carburizing control system of a vacuum carburizing furnace according to claim 1, characterized in that: The acetylene charging pipeline is connected with an acetylene exhaust pipeline, the nitrogen charging pipeline is connected with a nitrogen exhaust pipeline, and the nitrogen exhaust pipeline and the acetylene exhaust pipeline are respectively provided with pressure switches.

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