Device for controlling gas pressure behind heating furnace valve

Abstract

The utility model discloses a device for controlling the pressure of gas behind a heating furnace valve, which belongs to the technical field of heating furnaces and comprises a gas conveying pipeline, a gas inlet pipeline, a gas outlet pipeline and a gas outlet pipeline. The valve assembly comprises a blind plate valve mounted between the gas header pipe and the furnace area gas pipeline, an electric butterfly valve mounted between the gas header pipe and the blind plate valve, and a quick switching valve mounted between the blind plate valve and the furnace area gas pipeline; the electric control butterfly valve is arranged on the outlet side of the furnace area gas pipeline; the pressure detection element comprises a first pressure gauge mounted on the gas header pipe and a second pressure gauge mounted on the outlet side of the furnace area gas pipeline; the control part is used for receiving data of the first pressure gauge and the second pressure gauge and controlling the working state of the valve assembly. By the adoption of the technical scheme, the pressure of gas behind the heating furnace valve is stable, and reliable guarantee can be provided for safe and stable production.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating furnaces, and in particular relates to a device for controlling the gas pressure behind a heating furnace valve. Background Art

[0002] Heating furnaces play a vital role in the metallurgical industry. They are key equipment used to heat various materials or workpieces (typically metals) to a high temperature suitable for rolling or forging. This equipment occupies an important position in the classification of industrial furnaces. However, in actual operation, the gas pressure provided by the gas delivery unit is often unstable. This instability manifests itself as frequent changes and wide pressure fluctuations, typically between 7 and 16 kilopascals (kPa). This pressure fluctuation poses significant challenges to the precise control of the furnace pressure and heating temperature, thereby increasing risks and hidden dangers in equipment operation and process operations.

[0003] To effectively address this issue and ensure the heating furnace operates stably and meets expected process requirements, it's necessary to implement measures to improve and optimize gas pressure control. Specifically, adding a dedicated device to control the gas pressure after the heating furnace valve is crucial. This device monitors and adjusts the gas pressure in real time, ensuring it fluctuates within a set range, thereby providing a stable operating environment for the heating furnace. This significantly improves the efficiency and safety of the heating furnace, reduces the negative impact of pressure fluctuations, and ensures smooth operation of the entire metallurgical production process. Utility Model Content

[0004] In order to solve the technical problems existing in the known technology, the utility model provides a device for controlling the gas pressure after the heating furnace valve. The device is mainly suitable for large heating furnaces in hot rolling strip workshops, can ensure the stability of the gas pressure, and provide a reliable guarantee for stable production.

[0005] The purpose of this utility model is to provide a device for controlling the gas pressure after the heating furnace valve, comprising:

[0006] Gas pipeline, including gas main and furnace area gas pipeline;

[0007] A valve assembly, comprising a blind plate valve installed between the gas main and the furnace gas pipeline, an electric butterfly valve installed between the gas main and the blind plate valve, a quick-cut valve installed between the blind plate valve and the furnace gas pipeline; and an electric-controlled butterfly valve installed on the outlet side of the furnace gas pipeline;

[0008] Pressure detection elements, including a No. 1 pressure gauge installed on the gas main and a No. 2 pressure gauge installed on the outlet side of the furnace area gas pipeline;

[0009] A control unit for receiving data from pressure gauge No. 1 and pressure gauge No. 2 and controlling the working status of the valve assembly.

[0010] Preferably, the control unit exchanges data with the No. 1 pressure gauge and the No. 2 pressure gauge through the AI ​​module of the PLC.

[0011] Preferably, the control unit exchanges data with the valve assembly through a PLC-PID-AO module.

[0012] Preferably, the model of the electric butterfly valve is D947H-2.5, the model of the blind plate valve is F941X6, the model of the quick-cut valve is D647H-2.5, and the model of the electric-controlled butterfly valve is D947H-2.5.

[0013] Preferably, the models of the No. 1 pressure gauge and the No. 2 pressure gauge are EJA110A-DMS4A-92DA.

[0014] Preferably, the control unit is PLC400.

[0015] The advantages and positive effects of the utility model are:

[0016] By adopting the above technical solution, the utility model ensures the stability of the gas pressure after the heating furnace valve, thereby ensuring the stable production and operation of the heating furnace. Through multiple trials and tests, the implementation of the utility model has significantly improved the stability of the gas pressure after the heating furnace valve, further ensuring the efficient and safe operation of the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a preferred embodiment of the utility model;

[0018] Figure 2 This is a circuit diagram of a preferred embodiment of the present utility model.

[0019] Among them: 1. Gas main; 2. Electric butterfly valve; 3. Blind plate valve; 4. Quick-cut valve; 5. Furnace area gas pipeline; 6. Electric-controlled butterfly valve; 7. No. 2 pressure gauge; 8. No. 1 pressure gauge. DETAILED DESCRIPTION

[0020] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0021] The technical solution of the utility model is:

[0022] See also Figure 1 and Figure 2This device controls the gas pressure behind the heating furnace valves. It consists of four main components, ensuring stable and safe gas pressure. First, the gas pipeline, the foundation of the entire system, comprises the gas main 1 and the furnace gas pipelines 5. The gas main 1 transports gas from the source to the heating furnace area, while the furnace gas pipelines 5 distribute gas to each furnace, ensuring an even and stable gas supply.

[0023] The second component is the valve assembly, which is critical for controlling gas flow and pressure. The valve assembly includes multiple valves. First is the blind plate valve 3, installed between the gas main 1 and the furnace gas pipeline 5. It can quickly cut off the gas supply in an emergency, ensuring system safety. Next is the electric butterfly valve 2, installed between the gas main 1 and the blind plate valve 3. This electrically actuated valve precisely regulates gas flow and thus pressure. Furthermore, there is the quick-acting valve 4, installed between the blind plate valve 3 and the furnace gas pipeline 5. It switches on and off in record time, ensuring a rapid system response. Finally, the electrically controlled butterfly valve 6, installed at the outlet of the furnace gas pipeline 5, finely regulates gas flow to ensure stable pressure within the furnace.

[0024] The third component is the pressure sensing element, which includes two important pressure gauges. Pressure gauge 1 (8) is installed on the gas main (1) to monitor the gas pressure before entering the furnace area. Pressure gauge 2 (7) is installed on the outlet side of the furnace gas pipeline (5) to monitor the actual gas pressure within the furnace area. These two pressure gauges provide critical data support for the system, ensuring accurate pressure control.

[0025] The fourth component is the control unit, the core of the entire system. It receives data from pressure gauges 8 and 7 and adjusts the valve assembly's operating status in real time based on this data. Through precise algorithms and control logic, the control unit ensures that gas pressure remains within the set safety range, thereby ensuring stable operation of the heating furnace and the safety of the entire system.

[0026] In summary, this device achieves precise control of the gas pressure after the heating furnace valve through the coordinated work of the gas pipeline, valve assembly, pressure detection element and control unit, ensuring the efficient and safe operation of the heating furnace.

[0027] In order to achieve convenient operation, based on the above embodiment, it is preferred to adopt a remote control method, specifically:

[0028] The control unit exchanges data with the No. 1 pressure gauge 8 and the No. 2 pressure gauge 7 through the AI ​​module of the PLC.

[0029] The control unit exchanges data with the valve assembly via the PLC-PID-AO module.

[0030] The model of the electric butterfly valve 2 is D947H-2.5, the model of the blind plate valve 3 is F941X6, the model of the quick-cut valve 4 is D647H-2.5, and the model of the electric-controlled butterfly valve 6 is D947H-2.5.

[0031] The models of the No. 1 pressure gauge 8 and the No. 2 pressure gauge 7 are EJA110A-DMS4A-92DA.

[0032] The control unit is PLC400.

[0033] During operation, if the pressure displayed by pressure gauge 8 exceeds 10 kilopascals (kPa), appropriate adjustments are required to ensure stable system operation. The specific steps are as follows: First, the engineer needs to carefully observe the reading of pressure gauge 8. If the pressure exceeds 10 kPa, immediate action is taken. Next, the control unit adjusts the opening of the electronically controlled butterfly valve 6, finely adjusting the degree of opening and closing of the butterfly valve to control the system pressure. The control goal is to stabilize the pressure displayed by pressure gauge 7 at 8 kilopascals (kPa). By gradually adjusting the opening of the electronically controlled butterfly valve 6, the pressure value of pressure gauge 8 can be gradually reduced until the reading of pressure gauge 7 reaches and stabilizes at 8 kPa. This process requires continuous monitoring of the readings of both pressure gauges to ensure that the pressure values ​​fluctuate within the target range, thereby achieving stable pressure after the valve. Through this fine-tuning and continuous monitoring, the safe and efficient operation of the entire system can be ensured.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A device for controlling the gas pressure after the heating furnace valve, characterized in that: include: A gas transmission pipeline, the gas transmission pipeline comprising a gas main (1) and a furnace area gas pipeline (5); A valve assembly, comprising a blind plate valve (3) installed between a gas main (1) and a furnace gas pipeline (5), an electric butterfly valve (2) installed between the gas main (1) and the blind plate valve (3), a quick-cut valve (4) installed between the blind plate valve (3) and the furnace gas pipeline (5); and an electric-controlled butterfly valve (6) installed on the outlet side of the furnace gas pipeline (5); A pressure detection element, the pressure detection element comprising a No. 1 pressure gauge (8) installed on the gas main (1) and a No. 2 pressure gauge (7) installed on the outlet side of the furnace area gas pipeline (5); A control unit for receiving data from a No. 1 pressure gauge (8) and a No. 2 pressure gauge (7) and controlling the working state of the valve assembly.

2. The device for controlling the gas pressure after the heating furnace valve according to claim 1, characterized in that: The control unit exchanges data with the No. 1 pressure gauge (8) and the No. 2 pressure gauge (7) through the AI ​​module of the PLC.

3. The device for controlling the gas pressure after the heating furnace valve according to claim 1, characterized in that: The control unit exchanges data with the valve assembly via the PLC-PID-AO module.

4. The device for controlling the gas pressure after the heating furnace valve according to claim 1, characterized in that: The model of the electric butterfly valve (2) is D947H-2.5, the model of the blind plate valve (3) is F941X6, the model of the quick-cut valve (4) is D647H-2.5, and the model of the electric-controlled butterfly valve (6) is D947H-2.

5.

5. The device for controlling the gas pressure after the heating furnace valve according to claim 1, characterized in that: The models of the No. 1 pressure gauge (8) and the No. 2 pressure gauge (7) are EJA110A-DMS4A-92DA.

6. The device for controlling the gas pressure after the heating furnace valve according to claim 1, characterized in that: The control unit is PLC400.

Images