Central oxygen supply system

Abstract

The present invention discloses a central oxygen supply system, including: at least one first pressure reducer; at least one L-type pneumatic three-way ball valve, the gas source inlet of the pneumatic actuator on each L-type pneumatic three-way ball valve is connected to the main gas source, and a first pressure reducer is arranged on the pipeline connecting each gas source inlet and the main gas source, the first valve port on each L-type pneumatic three-way ball valve is connected to the main gas source, the second valve port is connected to the backup gas source, and the third valve port is connected to the oxygen output port, and when each first pressure reducer reduces the pressure of the main gas source to the operating pressure range of the corresponding L-type pneumatic three-way ball valve, each third valve port is connected to the corresponding first valve port. The present invention can automatically switch to the backup gas source when the pressure of the main gas source decreases, and can still automatically switch to the backup gas source when there is a power outage and the pressure of the main gas source decreases, thereby ensuring uninterrupted gas use by gas-using units.

Description

Technical Field

[0001] The present invention relates to the technical field of gas supply devices, and more particularly to a central oxygen supply system. Background Art

[0002] The oxygen switching device in the medical central oxygen production system is an important component of the medical central oxygen production system. The existing oxygen switching device has the problem of not being able to switch during power outages. Summary of the invention

[0003] The purpose of the present invention is to provide a central oxygen supply system, which can automatically switch to a backup gas source when the pressure of the main gas supply source decreases, and can also automatically switch to the backup gas source when there is a power outage and the pressure of the main gas supply source decreases, so as to ensure that gas-using units can use gas uninterruptedly.

[0004] In order to achieve these objects and other advantages according to the present invention, there is provided a central oxygen supply system comprising:

[0005] at least one first pressure reducer;

[0006] At least one L-type pneumatic three-way ball valve, the gas source inlet of the pneumatic actuator on each L-type pneumatic three-way ball valve is connected to the main gas supply source, and a first pressure reducer is arranged on the pipeline connecting each gas source inlet and the main gas supply source, the first valve port on each L-type pneumatic three-way ball valve is connected to the main gas supply source, the second valve port is connected to the backup gas source, and the third valve port is connected to the oxygen output port, and when each first pressure reducer reduces the pressure of the main gas supply source to within the operating pressure range of the corresponding L-type pneumatic three-way ball valve, each third valve port is connected to the corresponding first valve port.

[0007] Preferably, in the central oxygen supply system, the number of the first pressure reducer is one;

[0008] The central oxygen supply system also includes:

[0009] A first air pipe, one end of which is connected to the main air supply source, and the other end of which is connected to the air source inlet of each pneumatic actuator, so that the air source inlet of each pneumatic actuator is connected to the main air supply source, and the first pressure reducer is arranged on the first air pipe;

[0010] A first electric regulating valve, which is arranged on the first air pipe and located between the first pressure reducer and each air source inlet;

[0011] A second air pipe, one end of which is connected to a portion of the first air pipe located between the first electric regulating valve and each air source inlet;

[0012] A solenoid valve type exhaust valve, which is arranged on the second air pipe;

[0013] A gas output pipe, one end of which forms the oxygen output port, and the other end of which is connected to each third valve port;

[0014] A first pressure transmitter, which is arranged on one end of the gas output pipe;

[0015] A third air pipe, one end of which is connected to the air outlet of the main air supply source, and the other end of which is connected to each of the first valve ports. One end of the third air pipe is also connected to the end of the first air pipe, so that one end of the first air pipe is connected to the main air supply source;

[0016] a second pressure transmitter, which is arranged on one end of the third air pipe and is located between the end of the first air pipe and the air outlet of the main air supply source;

[0017] A backup gas source input pipe, one end of which is connected to the gas outlet of the backup gas source, and the other end of which is connected to each second valve port;

[0018] A third pressure transmitter is arranged on the backup gas source input pipe;

[0019] The controller is connected with the first electric regulating valve, the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the solenoid valve type exhaust valve.

[0020] Preferably, in the central oxygen supply system, the number of the L-shaped pneumatic three-way ball valves is two.

[0021] Preferably, in the central oxygen supply system, the middle portion of the third air pipe is composed of two fourth air pipes connected in parallel, and the fourth air pipes are located between the end of the first air pipe and each first valve port;

[0022] The central oxygen supply system also includes:

[0023] two second pressure reducers, which are respectively arranged on the two fourth air pipes;

[0024] The two first check valves are respectively arranged on the two fourth air pipes and are respectively located between the corresponding second pressure reducers and each first valve port.

[0025] Preferably, the central oxygen supply system further comprises:

[0026] Oxygen purity analyzer;

[0027] a fifth air pipe, one end of which is connected to a portion of the first air pipe between the first pressure reducer and the first electric regulating valve, and the other end of which is connected to the oxygen purity analyzer;

[0028] a third pressure reducer, which is arranged on the fifth air pipe;

[0029] The second electric regulating valve is arranged on the fifth air pipe and is located between the third pressure reducer and the oxygen purity analyzer.

[0030] Preferably, in the central oxygen supply system, the oxygen purity analyzer is connected to the controller, and the controller is connected to the alarm, the voice module and the DTU module.

[0031] Preferably, in the central oxygen supply system, a flow meter is further provided on the gas output pipe, and the flow meter is located between each third valve port and the first pressure transmitter.

[0032] Preferably, in the central oxygen supply system, a manual exhaust valve is further provided on the second air pipe.

[0033] Preferably, the central oxygen supply system further comprises:

[0034] The first stop valve is arranged on one end of the third air pipe and is located between the second pressure transmitter and the air outlet of the main air supply source.

[0035] Preferably, in the central oxygen supply system, the middle portion of the backup gas source input pipe is composed of two seventh gas pipes connected in parallel;

[0036] The central oxygen supply system also includes:

[0037] a fourth pressure reducer, which is arranged on one end of the backup gas source input pipe;

[0038] Two second check valves, which are respectively arranged on the two seventh air pipes and located between the fourth pressure reducer and each second valve port;

[0039] A second stop valve, which is arranged on the backup gas source input pipe and is located between the gas outlet of the backup gas source and the fourth pressure reducer;

[0040] The third pressure transmitter is arranged on the backup gas source input pipe and is located between the second stop valve and the fourth pressure reducer.

[0041] The present invention has at least the following beneficial effects:

[0042] The present invention switches the main gas supply source and the backup gas source through an L-shaped pneumatic three-way ball valve, and can automatically switch to the backup gas source when the pressure of the main gas supply source decreases. In addition, when there is a power outage and the pressure of the main gas supply source decreases, it can still automatically switch to the backup gas source, thereby ensuring uninterrupted gas use by gas-using units.

[0043] When the pressure of the main gas supply source and the backup gas source is lower than or higher than the set value, and the oxygen concentration is lower than the set value, the present invention alarms through the alarm device, and sends the information to the Internet of Things platform at the same time, and contacts the relevant person in charge through mobile phones, mobile phone text messages, etc., so that the alarm information is sent out at the same time in short and long distances, which is convenient for the person in charge to quickly deal with the fault.

[0044] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of a central oxygen supply system according to an embodiment of the present invention;

[0046] Figure 2 1 is a schematic diagram of the flow path structure of an L-type pneumatic three-way ball valve when the main air supply source supplies air according to an embodiment of the present invention;

[0047] Figure 3 The figure is a schematic diagram of the flow path structure of an L-type pneumatic three-way ball valve when a backup gas source is used to supply gas according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0049] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] like Figures 1 to 3 As shown, the present invention provides a central oxygen supply system, comprising:

[0051] at least one first pressure reducer 100;

[0052] At least one L-type pneumatic three-way ball valve 110, the gas source inlet of the pneumatic actuator on each L-type pneumatic three-way ball valve 110 is connected to the main gas source (molecular sieve oxygen production system or cryogenic storage tank), and a first pressure reducer 100 is arranged on the pipeline connecting each gas source inlet and the main gas source, the first valve port 111 on each L-type pneumatic three-way ball valve 110 is connected to the main gas source, the second valve port 112 is connected to the backup gas source (bus), and the third valve port 113 is connected to the oxygen output port, and when each first pressure reducer 100 reduces the pressure of the main gas source to within the operating pressure range of the corresponding L-type pneumatic three-way ball valve 110, each third valve port 113 is connected to the corresponding first valve port 111. The pneumatic three-way ball valve is an integrated air-controlled valve composed of a three-way ball valve and a pneumatic actuator. The L-type pneumatic three-way ball valve 110 is equipped with a travel limit switch, a solenoid valve, a pressure reducing valve (device) and a 0.3-0.8MPa air source to realize the switch operation. The L-type pneumatic three-way ball valve 110 is used to switch the flow direction of the medium and can connect two mutually perpendicular channels. The model of the L-type pneumatic three-way ball valve 110 used in this solution is AT92 high-pressure pneumatic three-way ball valve.

[0053] The central oxygen supply system provided by the present solution is first supplied with gas through the main gas supply source when in use. When the main gas supply source is supplying gas, the first pressure reducer 100 adjusts the pressure of the main gas supply source to within the operating pressure range of the L-type pneumatic three-way ball valve 110, and then uses the gas source to control the operation of the L-type pneumatic three-way ball valve 110. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the main gas supply is then output through the oxygen output port. When the main gas supply is insufficient and the pressure gradually decreases to below the operating pressure range of the L-type pneumatic three-way ball valve 110, the L-type pneumatic three-way ball valve 110 automatically switches the flow path so that each third valve port 113 is connected to the corresponding second valve port 112 (as shown in FIG. Figure 3 As shown), the backup gas source then supplies gas, and the backup gas source is output through the oxygen output port.

[0054] In order to ensure that the central oxygen supply system can still be used in the event of a power outage, a backup power supply can also be set up.

[0055] In another technical solution, in the central oxygen supply system, the number of the first pressure reducer 100 is one;

[0056] The central oxygen supply system also includes:

[0057] The first air pipe 120 has one end connected to the main air supply source, and the other end connected to the air source inlet of each pneumatic actuator, so that the air source inlet of each pneumatic actuator is connected to the main air supply source. The first pressure reducer 100 is arranged on the first air pipe 120; the main air supply source after decompression is transported to each air source inlet through the first air pipe 120 to control the operation of each L-type pneumatic three-way ball valve 110.

[0058] A first electric regulating valve 130, which is disposed on the first air pipe 120 and located between the first pressure reducer 100 and each air source inlet;

[0059] A second air pipe 140, one end of which is connected to a portion of the first air pipe 120 between the first electric regulating valve 130 and each air source inlet;

[0060] The solenoid valve type exhaust valve 150 is arranged on the second air pipe 140; by setting the exhaust valve, the gas between the first electric regulating valve 130 and each air source inlet on the first air pipe 120 can be quickly discharged, so that the L-type pneumatic three-way ball valve 110 can quickly switch the flow path.

[0061] A gas output pipe 160, one end of which forms the oxygen output port, and the other end of which is connected to each third valve port 113;

[0062] A first pressure transmitter 170, which is disposed on one end of the gas output pipe 160;

[0063] A third air pipe 180, one end of which is connected to the air outlet of the main air supply source, and the other end of which is connected to each of the first valve ports. One end of the third air pipe is also connected to the end of the first air pipe, so that one end of the first air pipe is connected to the main air supply source;

[0064] The second pressure transmitter 280 is arranged on one end of the third air pipe and is located between the end of the first air pipe and the air outlet of the main air supply source; the pressure of the main air supply source is collected in real time through the second pressure transmitter 280.

[0065] A backup gas source input pipe 290, one end of which is connected to the gas outlet of the backup gas source, and the other end of which is connected to each second valve port;

[0066] The third pressure transmitter 330 is arranged on the backup gas source input pipe; the pressure of the backup gas source is collected in real time through the third pressure transmitter 330 .

[0067] The controller is connected to the first electric regulating valve 130 , the first pressure transmitter 170 , the second pressure transmitter 280 , the third pressure transmitter 330 and the solenoid valve type exhaust valve 150 .

[0068] After the system is powered on, the controller controls the first electric regulating valve 130 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280, and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0069] The backup gas source pressure is adjusted to 0.8MPa, and then the main gas source is slowly opened, and the gas pressure in the first gas pipe 120 is adjusted to 0.6MPa through the first pressure reducer 100 (at this time, the gas pressure reaches the opening pressure of the L-type pneumatic three-way ball valve 110, which is 0.3-0.8MPa). The gas source is used to control the operation of the L-type pneumatic three-way ball valve 110. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa and then delivered to each first valve port 111. The main gas supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the gas pressure is 0.8 MPa.

[0070] When the second pressure transmitter 280 detects that the pressure of the main gas supply source is lower than the set value (such as 0.4MPa) (indicating that the main gas supply source is insufficient), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (such as 0.4MPa) (indicating that the backup gas source can be used), the controller controls the first electric regulating valve 130 to close and the solenoid valve type exhaust valve 150 to open for venting. When the gas pressure is lower than the opening pressure of the L-type pneumatic three-way ball valve 110, the L-type pneumatic three-way ball valve 110 switches the flow path so that each third valve port 113 is connected to the corresponding second valve port 112 (such as Figure 3 As shown), the main gas source is then switched to the backup gas source. The backup gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.

[0071] When the main gas supply source returns to normal, the first electric regulating valve 130 is opened, and then the main gas supply source is slowly opened, and the pressure of the main gas supply source is adjusted to 0.6MPa through the first pressure reducer 100, and the operation of the L-type pneumatic three-way ball valve 110 is controlled by the gas source. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa and then delivered to each first valve port 111, and the main gas supply source is output through the oxygen output port, and then the process is repeated continuously.

[0072] In another technical solution, in the central oxygen supply system, the number of the L-type pneumatic three-way ball valves 110 is two. Two L-type pneumatic three-way ball valves 110 are provided so that when one is damaged, the other can continue to be used.

[0073] In another technical solution, in the central oxygen supply system, the middle part of the third air pipe 180 is composed of two fourth air pipes 181 connected in parallel (a dual-path structure is used to increase the flow rate while reducing valve noise), and the fourth air pipe 181 is located between the end of the first air pipe 120 and each first valve port 111;

[0074] The central oxygen supply system also includes:

[0075] Two second pressure reducers 190, which are respectively arranged on the two fourth air pipes 181;

[0076] The two first check valves 200 are respectively arranged on the two fourth air pipes 181 and are respectively located between the corresponding second pressure reducers 190 and each first valve port 111 to prevent cross-flow of gases.

[0077] The two second pressure reducers 190 reduce the pressure of the gas in the fourth gas pipe 181 to 0.8 MPa respectively and then transport the gas to each first valve port 111 .

[0078] After the system is powered on, the controller controls the first electric regulating valve 130 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280, and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0079] The backup gas source pressure is adjusted to 0.8MPa, and then the main gas source is slowly opened, and the gas pressure in the first gas pipe 120 is adjusted to 0.6MPa through the first pressure reducer 100 (at this time, the gas pressure reaches the opening pressure of the L-type pneumatic three-way ball valve 110, which is 0.3-0.8MPa). The gas source is used to control the operation of the L-type pneumatic three-way ball valve 110. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the gas in the corresponding fourth air pipe 181 is then reduced in pressure to 0.8 MPa by two second pressure reducers 190 and then transported to each first valve port 111. The main air supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the gas pressure is 0.8 MPa.

[0080] In another technical solution, the central oxygen supply system further comprises:

[0081] Oxygen purity analyzer 210;

[0082] A fifth air pipe 220, one end of which is connected to a portion of the first air pipe 120 between the first pressure reducer 100 and the first electric regulating valve 130, and the other end of which is connected to the oxygen purity analyzer 210;

[0083] A third pressure reducer 230, which is disposed on the fifth air pipe 220;

[0084] The second electric regulating valve 240 is disposed on the fifth gas pipe 220 and is located between the third pressure reducer 230 and the oxygen purity analyzer 210 .

[0085] After the system is powered on, the controller controls the first electric regulating valve 130 and the second electric regulating valve 240 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280, and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0086] After the third pressure reducer 230 reduces the pressure of the gas in the fifth gas pipe 220 to a pressure that the oxygen purity analyzer 210 can withstand, the oxygen purity analyzer 210 performs purity analysis.

[0087] In another technical solution, in the central oxygen supply system, the oxygen purity analyzer 210 is connected to the controller, and the oxygen purity analyzer 210 continuously transmits the detected information to the controller, and the controller is connected to the alarm, voice module and DTU module. When the controller determines that the oxygen concentration is lower than the set value (such as 99.5%), the controller controls the alarm to sound, and sends a prompt sound through the voice module, and sends the information to the Internet of Things platform at the same time, and contacts the relevant person in charge through mobile phones, text messages, etc., so as to realize the short-range and long-range alarm information at the same time, which is convenient for the person in charge to quickly handle the fault.

[0088] The controller collects the pressure of the main gas supply source in real time through the second pressure transmitter 280, and collects the pressure of the backup gas source in real time through the third pressure transmitter 330. When the pressure of the main gas supply source or the backup gas source is lower than the set value (such as 0.4MPa) or higher than the set value (such as 0.9MPa), the controller controls the alarm and sends a prompt sound through the voice module. At the same time, the information is sent to the Internet of Things platform, and the relevant person in charge is contacted through mobile phones, text messages, etc. at the same time, so as to realize the simultaneous issuance of short-range and remote alarm information, which is convenient for the person in charge to quickly handle the fault.

[0089] After the system is powered on, the controller controls the first electric regulating valve 130 and the second electric regulating valve 240 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280, and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0090] The backup gas source pressure is adjusted to 0.8MPa, and then the main gas source is slowly opened, and the gas pressure in the first gas pipe 120 is adjusted to 0.6MPa through the first pressure reducer 100 (at this time, the gas pressure reaches the opening pressure of the L-type pneumatic three-way ball valve 110, which is 0.3-0.8MPa). The gas source is used to control the operation of the L-type pneumatic three-way ball valve 110. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa and then delivered to each first valve port 111. The main gas supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the gas pressure is 0.8 MPa.

[0091] When the second pressure transmitter 280 detects that the pressure of the main gas supply source is lower than the set value (such as 0.4MPa) (indicating that the main gas supply source is insufficient), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (such as 0.4MPa) (indicating that the backup gas source can be used), or when the second pressure transmitter 280 detects that the pressure of the main gas supply source is lower than the set value (such as 0.4MPa) (indicating that the main gas supply source is insufficient), the oxygen purity analyzer 210 detects that the oxygen purity is lower than the set value (such as 99.5%), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (such as 0.4MPa) (indicating that the backup gas source can be used) , or when the second pressure transmitter 280 detects that the pressure of the main gas supply source is higher than the set value (such as 0.4MPa), the oxygen purity analyzer 210 detects that the oxygen purity is lower than the set value (such as 99.5%), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (0.4MPa) (indicating that the backup gas source can be used), the controller controls the first electric regulating valve 130 to close, and the solenoid valve type exhaust valve 150 to open for venting. When the gas pressure is lower than the opening pressure of the L-type pneumatic three-way ball valve 110, the L-type pneumatic three-way ball valve 110 switches the flow path so that each third valve port 113 is connected to the corresponding second valve port 112 (such as Figure 3 As shown), the main gas source is then switched to the backup gas source. The backup gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.

[0092] When the main gas supply source returns to normal, the first electric regulating valve 130 is opened, and then the main gas supply source is slowly opened, and the pressure of the main gas supply source is adjusted to 0.6MPa through the first pressure reducer 100, and the operation of the L-type pneumatic three-way ball valve 110 is controlled by the gas source. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa and then delivered to each first valve port 111, and the main gas supply source is output through the oxygen output port, and then the process is repeated continuously.

[0093] In another technical solution, in the central oxygen supply system, a flow meter 250 is further provided on the gas output pipe 160 , and the flow meter 250 is located between each third valve port 113 and the first pressure transmitter 170 .

[0094] In another technical solution, in the central oxygen supply system, a manual exhaust valve 260 is further provided on the second air pipe 140. When power is off, the first electric regulating valve 130 can be manually closed and the manual exhaust valve 260 can be opened for air release.

[0095] In another technical solution, the central oxygen supply system further comprises:

[0096] The first stop valve 270 is disposed on one end of the third air pipe 180 and is located between the second pressure transmitter 280 and the air outlet of the main air supply source.

[0097] After the system is powered on, the controller controls the first electric regulating valve 130 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280, and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0098] The backup gas source pressure is adjusted to 0.8 MPa, and then the first stop valve 270 is slowly opened, and the gas pressure in the first gas pipe 120 is adjusted to 0.6 MPa through the first pressure reducer 100. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa through two second pressure reducers 190 and then delivered to each first valve port 111. The main gas supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the gas pressure is 0.8 MPa.

[0099] When the second pressure transmitter 280 detects that the pressure of the main gas supply source is lower than the set value (such as 0.4MPa) (indicating that the main gas supply source is insufficient), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (such as 0.4MPa) (indicating that the backup gas source can be used), the controller controls the first electric regulating valve 130 to close and the solenoid valve type exhaust valve 150 to open for venting. When the gas pressure is lower than the opening pressure of the L-type pneumatic three-way ball valve 110, the L-type pneumatic three-way ball valve 110 switches the flow path so that each third valve port 113 is connected to the corresponding second valve port 112 (such as Figure 3 As shown), the main gas source is then switched to the backup gas source. The backup gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.

[0100] When the main gas supply source returns to normal, the first electric regulating valve 130 is opened, and then the main gas supply source is slowly opened, and the pressure of the main gas supply source is adjusted to 0.6MPa through the first pressure reducer 100, and the operation of the L-type pneumatic three-way ball valve 110 is controlled by the gas source. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa and then delivered to each first valve port 111, and the main gas supply source is output through the oxygen output port, and then the process is repeated continuously.

[0101] In another technical solution, in the central oxygen supply system, the middle portion of the backup gas source input pipe 290 is composed of two seventh gas pipes 291 connected in parallel;

[0102] A fourth pressure reducer 300, which is disposed on one end of the backup gas source input pipe 290;

[0103] Two second check valves 310, which are respectively arranged on the two seventh air pipes 291 and located between the fourth pressure reducer 300 and each second valve port 112;

[0104] The second stop valve 320 is disposed on the backup gas source input pipe 290 and is located between the gas outlet of the backup gas source and the fourth pressure reducer 300 .

[0105] After the system is powered on, the controller controls the first electric regulating valve 130 to open, and starts to collect signals transmitted by the first pressure transmitter 170, the second pressure transmitter 280 and the third pressure transmitter 330, and converts the collected signals into relevant information and outputs them to the display panel.

[0106] The fourth pressure reducer 300 is adjusted to adjust the pressure to 0 MPa, and then the bus backup gas cylinder valve is opened, and then the second stop valve 320 is slowly opened, and the fourth pressure reducer 300 is adjusted to adjust the backup gas source pressure to 0.8 MPa.

[0107] Slowly open the first stop valve 270, and adjust the gas pressure in the first gas pipe 120 to 0.6 MPa through the first pressure reducer 100. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa through two second pressure reducers 190 and then delivered to each first valve port 111. The main gas supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the gas pressure is 0.8 MPa.

[0108] When the second pressure transmitter 280 detects that the pressure of the main gas supply source is lower than the set value (such as 0.4MPa) (indicating that the main gas supply source is insufficient), and the third pressure transmitter 330 detects that the pressure of the backup gas source is higher than the set value (such as 0.4MPa) (indicating that the backup gas source can be used), the controller controls the first electric regulating valve 130 to close and the solenoid valve type exhaust valve 150 to open for venting. When the gas pressure is lower than the opening pressure of the L-type pneumatic three-way ball valve 110, the L-type pneumatic three-way ball valve 110 switches the flow path so that each third valve port 113 is connected to the corresponding second valve port 112 (such as Figure 3 As shown), the main gas source is then switched to the backup gas source. The backup gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.

[0109] When the main gas supply source returns to normal, the first electric regulating valve 130 is opened, and then the main gas supply source is slowly opened, and the pressure of the main gas supply source is adjusted to 0.6MPa through the first pressure reducer 100, and the operation of the L-type pneumatic three-way ball valve 110 is controlled by the gas source. At this time, each third valve port 113 is connected to the corresponding first valve port 111 (such as Figure 2 As shown), the pressure of the main gas supply source is then adjusted to 0.8 MPa through two second pressure reducers 190 and then delivered to each first valve port 111. The main gas supply source is output through the oxygen output port, and then the process is repeated continuously.

[0110] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Central oxygen supply system, characterized in that: include: First pressure reducer; At least one L-shaped pneumatic three-way ball valve, the gas source inlet of the pneumatic actuator on each L-shaped pneumatic three-way ball valve is connected to the main gas supply source, and the first pressure reducer is arranged on the pipeline connecting each gas source inlet and the main gas supply source, the first valve port on each L-shaped pneumatic three-way ball valve is connected to the main gas supply source, the second valve port is connected to the backup gas source, and the third valve port is connected to the oxygen output port; A first air pipe, one end of which is connected to the main air supply source, and the other end of which is connected to the air source inlet of each pneumatic actuator, so that the air source inlet of each pneumatic actuator is connected to the main air supply source, and the first pressure reducer is arranged on the first air pipe; A first electric regulating valve, which is arranged on the first air pipe and located between the first pressure reducer and each air source inlet; A second air pipe, one end of which is connected to a portion of the first air pipe located between the first electric regulating valve and each air source inlet; A solenoid valve type exhaust valve, which is arranged on the second air pipe; A gas output pipe, one end of which forms the oxygen output port, and the other end of which is connected to each third valve port; A first pressure transmitter, which is arranged on one end of the gas output pipe; A third air pipe, one end of which is connected to the air outlet of the main air supply source, and the other end of which is connected to each of the first valve ports. One end of the third air pipe is also connected to the end of the first air pipe, so that one end of the first air pipe is connected to the main air supply source; a second pressure transmitter, which is arranged on one end of the third air pipe and is located between the end of the first air pipe and the air outlet of the main air supply source; A backup gas source input pipe, one end of which is connected to the gas outlet of the backup gas source, and the other end of which is connected to each second valve port; A third pressure transmitter is arranged on the backup gas source input pipe; A controller connected to the first electric regulating valve, the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the solenoid valve type exhaust valve; Among them, when the first pressure reducer reduces the pressure of the main air supply source to within the operating pressure range of the corresponding L-type pneumatic three-way ball valve, each third valve port is connected to the corresponding first valve port; when the main air supply source is insufficient and the pressure gradually decreases to below the operating pressure range of the L-type pneumatic three-way ball valve, the L-type pneumatic three-way ball valve automatically switches the flow path so that each third valve port is connected to the corresponding second valve port.

2. The central oxygen supply system according to claim 1, characterized in that: The number of the L-type pneumatic three-way ball valves is two.

3. The central oxygen supply system according to claim 1, characterized in that: The middle part of the third air pipe is composed of two fourth air pipes connected in parallel, and the fourth air pipe is located between the end of the first air pipe and each first valve port; The central oxygen supply system also includes: two second pressure reducers, which are respectively arranged on the two fourth air pipes; The two first check valves are respectively arranged on the two fourth air pipes and are respectively located between the corresponding second pressure reducers and each first valve port.

4. The central oxygen supply system according to claim 1, characterized in that: Also includes: Oxygen purity analyzer; a fifth air pipe, one end of which is connected to a portion of the first air pipe between the first pressure reducer and the first electric regulating valve, and the other end of which is connected to the oxygen purity analyzer; a third pressure reducer, which is arranged on the fifth air pipe; The second electric regulating valve is arranged on the fifth air pipe and is located between the third pressure reducer and the oxygen purity analyzer.

5. The central oxygen supply system according to claim 4, characterized in that: The oxygen purity analyzer is connected to the controller, and the controller is connected to the alarm, the voice module and the DTU module.

6. The central oxygen supply system according to claim 1, characterized in that: The gas output pipe is also provided with a flow meter, which is located between each third valve port and the first pressure transmitter.

7. The central oxygen supply system according to claim 1, characterized in that: The second air pipe is also provided with a manual exhaust valve.

8. The central oxygen supply system according to claim 1, characterized in that: Also includes: The first stop valve is arranged on one end of the third air pipe and is located between the second pressure transmitter and the air outlet of the main air supply source.

9. The central oxygen supply system according to claim 3, characterized in that: The middle part of the backup air source input pipe is composed of two seventh air pipes connected in parallel; The central oxygen supply system also includes: a fourth pressure reducer, which is arranged on one end of the backup gas source input pipe; Two second check valves, which are respectively arranged on the two seventh air pipes and located between the fourth pressure reducer and each second valve port; The second stop valve is arranged on the backup gas source input pipe and is located between the gas outlet of the backup gas source and the fourth pressure reducer.

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