Integrated vacuum system cabinet capable of reducing flammable and explosive risks

Abstract

The invention discloses an integrated vacuum system cabinet capable of reducing flammable and explosive risks, a cabinet body is provided with an air inlet, the top of the cabinet body is provided with an exhaust port and a negative pressure sensor, a vacuum obtaining device and a pipeline are arranged in the cabinet body, when the gas extraction function is reduced or fails, an early warning signal is sent out, and when the gas extraction function fails, the vacuum obtaining device is started. Simulation calculation is carried out in ANSYS finite element analysis software, the ANSYS finite element analysis software comprises a pre-processing module, an analysis calculation module and a post-processing module, and the pre-processing module provides solid modeling and grid division tools and is used for constructing a finite element model of a cabinet body; the analysis and calculation module comprises structural analysis and fluid dynamics analysis and is used for simulating interaction of various physical media; the post-processing module displays the calculation result in the form of a color contour line and outputs the calculation result in the form of a curve at the same time, flammable and explosive gas can be pumped away in time, and the risk of fire blast is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cabinets and relates to an integrated vacuum system cabinet capable of reducing flammable and explosive risks. Background Art

[0002] A cabinet is an independent or self-supporting casing used to house electrical or electronic equipment. It is an indispensable component of electrical equipment. The cabinet is the carrier of electrical control equipment and is generally made of cold-rolled steel plates or alloys. It can provide waterproof, dustproof, and electromagnetic interference protection for stored equipment. Cabinets are divided into server cabinets, network cabinets, console cabinets, etc.

[0003] The existing vacuum system cabinet and its accessories have their own control systems, many control panels, and loose logical connections. The air inlet and exhaust pipes of the vacuum acquisition equipment are exposed to the atmosphere. When extracting flammable and explosive gases, there is a risk of leakage at the inlet and exhaust pipe interfaces, causing flammable and explosive gases to spread in the air. In addition, during the operation of the vacuum system cabinet, a small amount of process gas will leak. The leaked process gas will accumulate in the cabinet. If it cannot be extracted by the exhaust fan in time, the risk of combustion and explosion is extremely high. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies in the prior art and to provide an integrated vacuum system cabinet that reduces the risk of flammability and explosion.

[0005] An integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances comprises a cabinet body, wherein the cabinet body is provided with an air inlet, an exhaust port and a negative pressure sensor are provided on the top of the cabinet body, the negative pressure sensor detects the internal and external pressure difference of the cabinet body in real time, and extracts the air through a local exhaust fan when leakage occurs, vacuum obtaining equipment and pipelines are arranged inside the cabinet body, and a warning signal is issued when the gas extraction function is reduced or fails, and simulation calculation is performed in ANSYS finite element analysis software, which comprises a pre-processing module, an analysis and calculation module and a post-processing module, wherein the pre-processing module provides entity modeling and meshing tools for constructing a finite element model of the cabinet body; the analysis and calculation module comprises structural analysis and fluid dynamics analysis for simulating the interaction of multiple physical media; the post-processing module displays the calculation results in the form of colored contour lines, and outputs the calculation results in the form of curves.

[0006] A further improvement of the present invention is that the exhaust port is made of a round tube with a diameter of 0.153 meters, the length of the cabinet body is 1.3 meters, the width of the cabinet body is 0.8 meters, and the gas volume of the cabinet body is 1.64 cubic meters. According to the ratio of the cross-sectional area of ​​the exhaust port to the cross-sectional area of ​​the cabinet body, the local resistance coefficient is 0.5.

[0007] A further improvement of the present invention is that the negative pressure value of the exhaust port is -250Pa, and the air pressure value inside the cabinet is 101325Pa.

[0008] A further improvement of the present invention is that the negative pressure value of the exhaust port is -500Pa.

[0009] A further improvement of the present invention is that the negative pressure value of the exhaust port is -800Pa.

[0010] A further improvement of the present invention is that, according to the formula: ; get: ; in u is the gas flow rate in the pipeline, ΔP is the pressure drop value, ρ is the density of air at 20°C; is the local resistance coefficient; The flow rate of the exhaust port is: ; in u is the gas flow rate in the pipeline, A 2 is the cross-sectional area of ​​the exhaust port, Q is the flow value of the exhaust port; The gas exchange efficiency inside the cabinet is: ; in Q is the gas flow value; V is the volume of gas in the cabinet, and 2 is the safety factor.

[0011] A further improvement of the present invention is that the air inlet is a fish scale structure.

[0012] A further improvement of the present invention is that ANSYS finite element analysis software performs transient or steady-state fluid dynamics analysis.

[0013] Compared with the prior art, the integrated vacuum system cabinet provided by the present invention reduces the risk of flammability and explosion, and achieves at least the following beneficial effects: The present invention discloses an integrated vacuum system cabinet for reducing the risk of flammable and explosive gases. During simulation calculation, the user can adjust and optimize the cabinet body according to specific simulation requirements, and the vacuum acquisition equipment and pipelines can be arranged in the cabinet of the integrated vacuum acquisition system. The switches of all equipment can be controlled through a control panel, and the operating data of the vacuum system cabinet can be monitored. The negative pressure sensor can detect the internal and external pressure difference of the cabinet body in real time. When leakage occurs, it can be quickly evacuated through a local exhaust fan, thereby reducing the concentration of flammable and explosive gases in the cabinet, reducing the risk of combustion and explosion, and being safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of an integrated vacuum system cabinet for reducing flammable and explosive risks according to the present invention; Figure 2 It is a top view of the present invention. DETAILED DESCRIPTION

[0015] Various exemplary embodiments of the present invention are now described in detail. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. The following description of at least one exemplary embodiment is actually only illustrative and is not intended to be any limitation on the present invention and its application or use.

[0016] The techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0017] See the instruction manual Figure 1-2 , an integrated vacuum system cabinet for reducing the risk of flammability and explosion, including a cabinet body, the cabinet body is provided with an air inlet, the top of the cabinet body is provided with an exhaust port and a negative pressure sensor, the negative pressure sensor detects the internal and external pressure difference of the cabinet body in real time, and extracts the air through a local exhaust fan when a leak occurs, the interior of the cabinet body is arranged with a vacuum acquisition device and a pipeline, and a warning signal is issued when the gas extraction function is reduced or fails, and simulation calculation is performed in ANSYS finite element analysis software, the ANSYS finite element analysis software includes a pre-processing module, an analysis and calculation module and a post-processing module, the pre-processing module provides entity modeling and meshing tools for constructing a finite element model of the cabinet body; the analysis and calculation module includes structural analysis and fluid dynamics analysis for simulating the interaction of multiple physical media; the post-processing module displays the calculation results in color contour lines, and outputs the calculation results in the form of curves.

[0018] The exhaust port is made of a round tube with a diameter of 0.153 meters. The length of the cabinet body is 1.3 meters. The width of the cabinet body is 0.8 meters. The gas volume of the cabinet body is 1.64 cubic meters. According to the ratio of the cross-sectional area of ​​the exhaust port to the cross-sectional area of ​​the cabinet body, the local resistance coefficient is 0.5.

[0019] The negative pressure value of the exhaust port is -250Pa, and the air pressure value inside the cabinet is 101325Pa.

[0020] The negative pressure value of the exhaust port is -500Pa, and the flow value of the exhaust port is 0.7496 cubic meters per second; the negative pressure value of the exhaust port is -800Pa, and the flow value of the exhaust port is 0.9482 cubic meters per second; According to the formula: ; get: ; in u is the gas flow rate in the pipeline, ΔP is the pressure drop value, ρ is the density of air at 20°C; is the local resistance coefficient; The flow rate of the exhaust port is: ; in u is the gas flow rate in the pipeline, A 2 is the cross-sectional area of ​​the exhaust port, Q is the flow value of the exhaust port; The gas exchange efficiency inside the cabinet is: ; in Q is the gas flow value; V is the volume of gas in the cabinet, and 2 is the safety factor.

[0021] The air inlet has a fish scale structure; ANSYS finite element analysis software performs transient or steady-state fluid dynamics analysis, making the analysis results closer to the actual situation.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An integrated vacuum system cabinet for reducing the risk of flammability and explosion, characterized in that: The invention comprises a cabinet body, wherein the cabinet body is provided with an air inlet, and the top of the cabinet body is provided with an exhaust port and a negative pressure sensor, wherein the negative pressure sensor detects the internal and external pressure difference of the cabinet body in real time, and extracts the air through a local exhaust fan when a leak occurs, wherein vacuum obtaining equipment and pipelines are arranged inside the cabinet body, and an early warning signal is issued when the gas extraction function is reduced or fails, and simulation calculation is performed in ANSYS finite element analysis software, wherein the ANSYS finite element analysis software comprises a pre-processing module, an analysis and calculation module and a post-processing module, wherein the pre-processing module provides entity modeling and meshing tools for constructing a finite element model of the cabinet body; the analysis and calculation module comprises structural analysis and fluid dynamics analysis for simulating the interaction of multiple physical media; the post-processing module displays the calculation results in the form of colored contour lines, and outputs the calculation results in the form of curves.

2. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 1, characterized in that: The exhaust port is made of a round tube with a diameter of 0.153 meters. The length of the cabinet body is 1.3 meters. The width of the cabinet body is 0.8 meters. The gas volume of the cabinet body is 1.64 cubic meters. According to the ratio of the cross-sectional area of ​​the exhaust port to the cross-sectional area of ​​the cabinet body, the local resistance coefficient is 0.

5.

3. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 2, characterized in that: The negative pressure value of the exhaust port is -250Pa, and the air pressure value inside the cabinet is 101325Pa.

4. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 2, characterized in that: The negative pressure value of the exhaust port is -500Pa.

5. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 2, characterized in that: The negative pressure value of the exhaust port is -800Pa.

6. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 3, characterized in that: According to the formula: ； get: ； in u is the gas flow rate in the pipeline, ΔP is the pressure drop value, ρ is the density of air at 20°C; is the local resistance coefficient; The flow rate of the exhaust port is: ； in u is the gas flow rate in the pipeline, A 2 is the cross-sectional area of ​​the exhaust port, Q is the flow value of the exhaust port; The gas exchange efficiency inside the cabinet is: ； in Q is the gas flow value; V is the volume of gas in the cabinet, and 2 is the safety factor.

7. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to claim 1, characterized in that: The air inlet is a fish scale structure.

8. The integrated vacuum system cabinet for reducing the risk of inflammable and explosive substances according to any one of claims 1 to 7, characterized in that: The ANSYS finite element analysis software performs transient or steady-state fluid dynamics analysis.

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