Gas holder capable of supplying gas uninterruptedly

Abstract

The utility model relates to the field of gas holders, in particular to a gas holder capable of supplying gas uninterruptedly, which comprises a holder body, a main pipeline, a standby pipeline and an emptying pipeline are arranged in the holder body, a first diaphragm valve and a flame arrester are arranged on each of the main pipeline and the standby pipeline, a pressure reducing valve and a pressure gauge are further arranged on the main pipeline, and the standby pipeline is connected with the pressure reducing valve. A second diaphragm valve is installed on the emptying pipeline, and pressure sensors are installed on the main pipeline and the standby pipeline and located between the air inlet and the first diaphragm valve. According to the product, intelligent switching of gas sources of the main pipeline and the standby pipeline can be achieved, uninterrupted gas supply is achieved, automatic control under unattended operation is achieved through the pressure sensor, the PLC and the pneumatic executing mechanism, and the product is particularly suitable for stable supply of combustible gas.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gas cabinet, specifically is a kind of uninterrupted gas cabinet. BACKGROUND

[0002] Gas cabinet is used to store various industrial gases, and is also used to balance the unevenness of gas demand, a kind of container equipment, can supply gas for equipment.

[0003] But the gas path pressure of existing gas cabinet is insufficient, the operation of gas cabinet needs to be stopped to carry out maintenance, the gas cabinet at this time will interrupt the gas supply for equipment, cannot meet the use demand of equipment. UTILITY MODEL CONTENT

[0004] To achieve the above object, the utility model aims at providing a kind of uninterrupted gas cabinet, can solve the problems in the background art.The utility model provides the following technical scheme:

[0005] A kind of uninterrupted gas cabinet, including cabinet, main pipe line, standby pipe line and emptying pipe line are installed in cabinet, first diaphragm valve and fire arrestor are installed on main pipe line and standby pipe line, and pressure reducing valve and pressure gauge are also installed on main pipe line, standby pipe line is connected with pressure reducing valve, second diaphragm valve is installed on emptying pipe line, pressure sensor is installed on main pipe line and standby pipe line, and pressure sensor is located between inlet and first diaphragm valve, pressure sensor is used to detect steel bottle pressure in the product, is used to detect pressure alarm, first diaphragm valve is used to control emergency cut-off of gas path, close when concentration alarm, second diaphragm valve is used to control gas path emptying, ensure gas cleanliness, pressure reducing valve is used to control internal pressure of pipe, to realize the output of stable flow, pressure gauge is used to show gas path pressure after pressure reducing valve, fire arrestor is used to prevent internal gas combustion of pipe, can prevent backflow, the seamless switching of main pipe line and standby pipe line is realized by PLC logic judgment in the product, and working process is as follows: pressure sensor real-time monitoring pressure value of main pipe line and standby pipe line, when main pipe line pressure drops to preset lower limit (such as 0.6MPa), PLC sends switching instruction to electromagnetic valve, at this time, pressure sensor detects pressure value of standby pipe line, if standby pipe line pressure is insufficient or failure, system triggers alarm and prohibits switching, if standby pipe line pressure is sufficient, standby pipe line starts to supply gas, it is noted that main gas cabinet outlet valve needs to be closed before switching, then wait 1~2 seconds, can avoid airflow impact.

[0006] As a further scheme of the utility model: filter is also installed in cabinet, filter is located after pressure reducing valve, can be filtered twice, to reduce internal particulate matter of rear-end pipe.

[0007] As a further scheme of the utility model: the pressure sensor, the first diaphragm valve, the second diaphragm valve, the pressure reducing valve, the pressure gauge and the flame arrestor are all fixed in the cabinet body by welding, firmness of connection is good, and they are not easy to fall off.

[0008] As a further scheme of the utility model: the pressure sensor, the first diaphragm valve, the second diaphragm valve, the pressure reducing valve, the pressure gauge and the flame arrestor are all fixed in the cabinet body by welding, firmness of connection is good, and they are not easy to fall off.

[0009] As a further scheme of the utility model: the pressure gauge adopts a low-pressure pressure gauge, and the first diaphragm valve adopts a pneumatic diaphragm valve.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The product can realize intelligent switching of main pipe and standby pipe gas sources, realizes uninterrupted gas supply, realizes automatic control under unattended condition through the pressure sensor, the PLC controller and the pneumatic actuator, and is especially suitable for stable supply of combustible gas (customized explosion-proof design). BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure schematic view of the gas cabinet of the utility model embodiment for uninterrupted gas supply.

[0013] In the drawing: 1-pressure sensor, 2-first diaphragm valve, 3-second diaphragm valve, 4-pressure reducing valve, 5-pressure gauge, 6-filter, 7-flame arrestor. DETAILED DESCRIPTION

[0014] The technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings of the utility model embodiment, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0015] The specific implementation of the utility model will be described in detail in combination with specific embodiments.

[0016] Please refer to Figure 1The utility model discloses a kind of uninterrupted gas supply's gas cabinet, including cabinet, main pipeline, standby pipeline and emptying pipeline are installed in cabinet, first diaphragm valve 2 and fire arrestor 7 are installed on main pipeline and standby pipeline, and pressure reducing valve 4 and pressure gauge 5 are also installed on main pipeline, standby pipeline is connected with pressure reducing valve 4, second diaphragm valve 3 is installed on emptying pipeline, pressure sensor 1 is installed on main pipeline and standby pipeline, and pressure sensor 1 is between air inlet and first diaphragm valve 2, pressure sensor 1 is used to detect steel bottle pressure in the product, for detecting pressure alarm, first diaphragm valve 2 is used to control gas path emergency cut-off, close when concentration alarm, second diaphragm valve 3 is used to control gas path emptying, guarantee gas cleanliness, pressure reducing valve 4 is used to regulate and control pipeline internal pressure, to realize the output of stable flow, pressure gauge 5 is used to show gas path pressure after pressure reducing valve 4, fire arrestor 7 is used to prevent pipeline internal gas combustion, can prevent backflow, the product is switched seamlessly by PLC logic judgment main pipeline and standby pipeline, working process is as follows: pressure sensor 1 real-time monitoring pressure value of main pipeline and standby pipeline, when main pipeline pressure drops to preset lower limit (such as 0.6MPa), PLC sends switching instruction to electromagnetic valve, when pressure sensor 1 detects pressure value of standby pipeline, if standby pipeline pressure is insufficient or failure, system triggers alarm and prohibits switching, if standby pipeline pressure is sufficient, standby pipeline starts to supply gas, it is noted that main gas cabinet outlet valve needs to be closed before switching, then wait 1~2 seconds, gas flow impact can be avoided.

[0017] In an embodiment of the utility model, filter 6 is located behind pressure reducing valve 4, can be filtered twice, to reduce the particulate matter in the pipeline.

[0018] In an embodiment of the utility model, filter 6 is fixed in cabinet by VCR (Vacuum Coupling Radius Seal, vacuum coupling radius seal) welding mode, can guarantee continuously filtering for rear pipeline, further, the filtering accuracy of filter 6 is at least 0.003 μm, this filtering accuracy can guarantee filtering effect, to ensure the use cleanliness of rear gas.

[0019] In an embodiment of the utility model, pressure sensor 1, first diaphragm valve 2, second diaphragm valve 3, pressure reducing valve 4, pressure gauge 5 and fire arrestor 7 are fixed in cabinet by welding mode, connection firmness is good, not easy to fall off.

[0020] In one embodiment of the utility model, pressure sensor 1, first diaphragm valve 2, second diaphragm valve 3, pressure reducing valve 4, pressure gauge 5 and flame arrester 7 are all fixed in the cabinet body by VCR (Vacuum Coupling Radius Seal) welding mode, which can ensure good connection firmness and excellent sealing performance.

[0021] In one embodiment of the utility model, pressure gauge 5 adopts low-pressure pressure gauge, which can better display the pressure at the rear end of pressure reducing valve 4, and ensure that the pressure is within the display range of pressure gauge 5.

[0022] It should be noted that, in the utility model, unless otherwise explicitly specified and limited, the terms "fixed", "provided" and other terms should be understood broadly, for example, it can be welded connection, or bolted connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the skilled person in the art should understand the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by the skilled person.

Claims

1. A gas holder for uninterrupted gas supply, comprising a cabinet body, wherein a main pipeline, a backup pipeline, and a vent pipeline are installed inside the cabinet body; a first diaphragm valve and a flame arrester are installed on both the main pipeline and the backup pipeline; a pressure reducing valve and a pressure gauge are also installed on the main pipeline; the backup pipeline is connected to the pressure reducing valve; and a second diaphragm valve is installed on the vent pipeline, characterized in that, The pressure sensor is arranged on the main pipeline and the standby pipeline and between the air inlet and the first diaphragm valve.

2. The gas cabinet of claim 1, wherein, A filter is arranged in the cabinet and behind the pressure reducing valve.

3. The gas cabinet of claim 1, wherein, The pressure sensor, the first diaphragm valve, the second diaphragm valve, the pressure reducing valve, the pressure gauge and the flame arrester are fixed in the cabinet by welding.

4. The gas cabinet of claim 3, wherein, The pressure sensor, the first diaphragm valve, the second diaphragm valve, the pressure reducing valve, the pressure gauge and the flame arrester are fixed in the cabinet by VCR welding.

5. The gas cabinet of claim 1 or 2, wherein The pressure gauge is a low-pressure pressure gauge.

Images