CN113289179B - Central oxygen supply system - Google Patents
Central oxygen supply system Download PDFInfo
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- CN113289179B CN113289179B CN202110660812.9A CN202110660812A CN113289179B CN 113289179 B CN113289179 B CN 113289179B CN 202110660812 A CN202110660812 A CN 202110660812A CN 113289179 B CN113289179 B CN 113289179B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes with alarm devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
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- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The invention discloses a central oxygen supply system which comprises at least one first pressure reducer and at least one L-shaped pneumatic three-way ball valve, wherein an air source inlet of a pneumatic actuator on each L-shaped pneumatic three-way ball valve is communicated with a main air supply source, a first pressure reducer is arranged on a pipeline communicated between each air source inlet and the main air supply source, a first valve port on each L-shaped pneumatic three-way ball valve is communicated with the main air supply source, a second valve port is communicated with a standby air source, a third valve port is communicated with an oxygen outlet, and when each first pressure reducer reduces the pressure of the main air supply source to be within the operating pressure range of the corresponding L-shaped pneumatic three-way ball valve, each third valve port is communicated with the corresponding first valve port. The invention can automatically switch to the standby air source when the pressure of the main air supply source is reduced, and can still automatically switch to the standby air source when the pressure of the main air supply source is reduced in power failure, thereby ensuring uninterrupted air utilization of air utilization units.
Description
Technical Field
The invention relates to the technical field of air supply devices. More particularly, the present invention relates to a central oxygen supply system.
Background
The oxygen switching device in the medical center oxygen generation system is an important component part in the medical center oxygen generation system. The existing oxygen switching device has the problem that the switching cannot be performed during power failure.
Disclosure of Invention
The invention aims to provide a central oxygen supply system which can be automatically switched to a standby air source when the pressure of a main air supply source is reduced, and can be automatically switched to the standby air source when power is cut off and the pressure of the main air supply source is reduced, so that the air consumption unit can continuously use air.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a central oxygen supply system comprising:
at least one first pressure reducer;
The air source inlets of the pneumatic actuators on the L-shaped pneumatic three-way ball valves are communicated with the main air supply source, a first pressure reducer is arranged on a pipeline between the air source inlets and the main air supply source, the first valve ports on the L-shaped pneumatic three-way ball valves are communicated with the main air supply source, the second valve ports are communicated with the standby air source, the third valve ports are communicated with the oxygen output ports, and when the pressure of the main air supply source is reduced to be within the operating pressure range of the corresponding L-shaped pneumatic three-way ball valve by the first pressure reducer, the third valve ports are communicated with the corresponding first valve ports.
Preferably, in the central oxygen supply system, the number of the first pressure reducers is one;
the central oxygen supply system further comprises:
the first air pipe is communicated with the main air supply source at one end and the air source inlets of all the pneumatic actuators at the other end, so that the air source inlets of all the pneumatic actuators are communicated with the main air supply source, and the first pressure reducer is arranged on the first air pipe;
a first electrically-controlled valve disposed on the first air line between the first pressure reducer and each air source inlet;
One end of the second air pipe is communicated with a part of the first air pipe, which is positioned between the first electric regulating valve and each air source inlet;
a solenoid valve type exhaust valve provided on the second air pipe;
one end of the gas output pipe forms the oxygen output port, and the other end of the gas output pipe is communicated with each third valve port;
A first pressure transmitter disposed on one end of the gas outlet conduit;
One end of the third air pipe is communicated with the air outlet of the main air supply source, the other end of the third air pipe is communicated with each first valve port, and one end of the third air pipe is also communicated with the tail end of the first air pipe, so that one end of the first air pipe is communicated with the main air supply source;
A second pressure transmitter arranged on one end of the third air pipe and positioned between the tail end of the first air pipe and the air outlet of the main air supply source;
One end of the standby air source input pipe is communicated with the air outlet of the standby air source, and the other end of the standby air source input pipe is communicated with each second valve port;
A third pressure transmitter disposed on the alternate air source input tube;
And the controller is connected with the first electrically-controlled valve, the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the electromagnetic valve type exhaust valve.
Preferably, in the central oxygen supply system, the number of the L-shaped pneumatic three-way ball valves is two.
Preferably, in the central oxygen supply system, the middle part of the third air pipe is composed of two fourth air pipes connected in parallel, and the fourth air pipes are positioned between the tail ends of the first air pipes and the first valve ports;
the central oxygen supply system further comprises:
two second pressure reducers which are respectively arranged on the two fourth air pipes;
And the two first check valves are respectively arranged on the two fourth air pipes and are respectively positioned between the second pressure reducers corresponding to the first check valves and the first valve ports.
Preferably, the central oxygen supply system further comprises:
An oxygen purity analyzer;
One end of the fifth air pipe is communicated with a part of the first air pipe, which is positioned between the first pressure reducer and the first electric regulating valve, and the other end of the fifth air pipe is connected with the oxygen purity analyzer;
a third pressure reducer provided on the fifth air pipe;
And a second electrically-controlled valve arranged on the fifth air pipe and positioned between the third pressure reducer and the oxygen purity analyzer.
Preferably, in the central oxygen supply system, the oxygen purity analyzer is connected with a controller, and the controller is connected with an alarm, a voice module and a DTU module.
Preferably, in the central oxygen supply system, a flowmeter is further arranged on the gas output pipe, and the flowmeter is located between each third valve port and the first pressure transmitter.
Preferably, in the central oxygen supply system, a manual exhaust valve is further disposed on the second air pipe.
Preferably, the central oxygen supply system further comprises:
and the first stop valve is arranged on one end of the third air pipe and is positioned between the second pressure transmitter and the air outlet of the main air supply source.
Preferably, in the central oxygen supply system, the middle part of the standby air source input pipe consists of two seventh air pipes which are connected in parallel;
the central oxygen supply system further comprises:
a fourth pressure reducer arranged at one end of the standby air source input pipe;
Two second check valves respectively arranged on the two seventh air pipes and positioned between the fourth pressure reducer and each second valve port;
The second stop valve is arranged on the standby air source input pipe and is positioned between the air outlet of the standby air source and the fourth pressure reducer;
And a third pressure transmitter is arranged on the standby air source input pipe and is positioned between the second stop valve and the fourth pressure reducer.
The invention at least comprises the following beneficial effects:
The invention switches the main air supply source and the standby air supply source through the L-shaped pneumatic three-way ball valve, can automatically switch to the standby air supply source when the pressure of the main air supply source is reduced, and can still automatically switch to the standby air supply source when the pressure of the main air supply source is reduced in power failure, thereby ensuring uninterrupted air utilization of air utilization units.
When the pressure of the main air supply source and the standby air supply source is lower than or higher than a set value and the oxygen concentration is lower than the set value, the system alarms through the alarm, and simultaneously sends information to the platform of the internet of things, and related responsible persons are contacted in a mobile phone and mobile phone short message mode, so that alarm information can be sent in a short-range and long-range mode at the same time, and the responsible persons can conveniently and rapidly process faults.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a central oxygen supply system according to one embodiment of the present invention;
FIG. 2 is a schematic view of the flow path structure of an L-shaped pneumatic three-way ball valve when a main air supply source supplies air according to one embodiment of the invention;
FIG. 3 is a schematic flow path structure of an L-shaped pneumatic three-way ball valve when the standby air source supplies air according to one embodiment of the invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It should be noted that, in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides a central oxygen supply system comprising:
at least one first pressure reducer 100;
At least one L-shaped pneumatic three-way ball valve 110, the air source inlet of the pneumatic actuator on each L-shaped pneumatic three-way ball valve 110 is communicated with a main air supply source (a molecular sieve oxygen generating system or a low-temperature storage tank), a first pressure reducer 100 is arranged on a pipeline communicated between the air source inlet and the main air supply source, a first valve port 111 on each L-shaped pneumatic three-way ball valve 110 is communicated with the main air supply source, a second valve port 112 is communicated with a standby air source (a busbar), a third valve port 113 is communicated with an oxygen outlet, and when each first pressure reducer 100 reduces the pressure of the main air supply source to be within the operating pressure range of the corresponding L-shaped pneumatic three-way ball valve 110, each third valve port 113 is communicated with the corresponding first valve port 111. The pneumatic three-way ball valve is an integrated pneumatic control valve consisting of a three-way ball valve and a pneumatic actuator. The L-shaped pneumatic three-way ball valve 110 is provided with a travel limit switch, an electromagnetic valve, a pressure reducing valve (device) and a gas source of 0.3-0.8MPa, so that the switching operation can be realized. The L-shaped pneumatic three-way ball valve 110 is used for switching the flow direction of media, and can enable two mutually perpendicular channels to be communicated. The model of the L-shaped pneumatic three-way ball valve 110 used in the scheme is an AT92 high-pressure pneumatic three-way ball valve.
In the central oxygen supply system provided by the scheme, when the central oxygen supply system is used, air is supplied through the main air supply source, when the main air supply source supplies air, the first pressure reducer 100 regulates the pressure of the main air supply source to be within the operating pressure range of the L-shaped pneumatic three-way ball valve 110, the air source is used for controlling the operation of the L-shaped pneumatic three-way ball valve 110, at the moment, each third valve port 113 is communicated with the corresponding first valve port 111 (shown in fig. 2), then the main air supply source is output through an oxygen output port, when the main air supply source is insufficient, the pressure is gradually reduced to be lower than the operating pressure range of the L-shaped pneumatic three-way ball valve 110, the L-shaped pneumatic three-way ball valve 110 automatically switches the flow paths, each third valve port 113 is communicated with the corresponding second valve port 112 (shown in fig. 3), and then the standby air source supplies air and is output through the oxygen output port.
In order to enable the central oxygen supply system to still be used in the event of power failure, a standby power supply can also be arranged.
In another aspect, in the central oxygen supply system, the number of the first pressure reducers 100 is one;
the central oxygen supply system further comprises:
The first air pipe 120 has one end connected to the main air supply and the other end connected to the air supply inlet of each pneumatic actuator, so that the air supply inlet of each pneumatic actuator is connected to the main air supply, the first pressure reducer 100 is disposed on the first air pipe 120, and the depressurized main air supply is delivered to each air supply inlet through the first air pipe 120 to control the operation of each L-shaped pneumatic three-way ball valve 110.
A first electrically-controlled valve 130 disposed on the first gas line 120 between the first pressure reducer 100 and each of the gas source inlets;
A second air pipe 140, one end of which is communicated with a portion of the first air pipe 120 located between the first electrically adjustable valve 130 and each air source inlet;
And a solenoid valve type exhaust valve 150 provided on the second air pipe 140, which can rapidly exhaust the air on the first air pipe 120 between the first electrically controlled valve 130 and each air source inlet, so that the L-shaped pneumatic three-way ball valve 110 rapidly switches the flow paths.
A gas output pipe 160, one end of which forms the oxygen output port and the other end of which communicates with each third valve port 113;
A first pressure transmitter 170 disposed on one end of the gas outlet tube 160;
One end of the third air pipe 180 is communicated with the air outlet of the main air supply source, the other end of the third air pipe is communicated with each first valve port, and one end of the third air pipe is also communicated with the tail end of the first air pipe, so that one end of the first air pipe is communicated with the main air supply source;
And a second pressure transmitter 280 disposed at one end of the third air pipe and between the end of the first air pipe and the air outlet of the main air supply, and collecting the pressure of the main air supply in real time through the second pressure transmitter 280.
A standby air source input pipe 290, one end of which is communicated with the air outlet of the standby air source, and the other end of which is communicated with each second valve port;
and a third pressure transmitter 330 arranged on the standby air source input pipe, and acquiring the pressure of the standby air source in real time through the third pressure transmitter 330.
A controller coupled to each of the first electrically controlled valve 130, the first pressure transmitter 170, the second pressure transmitter 280, the third pressure transmitter 330, and the solenoid valve vent valve 150.
After the system is powered on, the controller controls the first electrically-controlled 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 meanwhile, converts the collected signals into relevant information and outputs the relevant information to the display panel.
The pressure of the standby air source is regulated to 0.8MPa, then the main air supply is slowly opened, the air pressure in the first air pipe 120 is regulated to 0.6MPa through the first pressure reducer 100 (the air pressure reaches the opening pressure of the L-shaped pneumatic three-way ball valve 110 by 0.3-0.8 MPa), the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at the moment, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa, the main air supply is conveyed to each first valve port 111, the main air supply is output through an oxygen output port, and the first pressure transmitter 170 detects that the air pressure is 0.8MPa.
When the second pressure transmitter 280 detects that the pressure of the main air supply is lower than a set value (e.g., 0.4 MPa) (which indicates that the main air supply is insufficient), and the third pressure transmitter 330 detects that the pressure of the standby air supply is higher than the set value (e.g., 0.4 MPa) (which indicates that the standby air supply can be used), the controller controls the first electrically-controlled valve 130 to be closed, the solenoid valve type air outlet valve 150 to be opened for air leakage, and when the air 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 paths so that each third valve port 113 is communicated with the corresponding second valve port 112 (as shown in fig. 3), and then the main air supply is switched to the standby air supply. The standby gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.
When the main air supply is recovered, the first electrically-controlled valve 130 is opened, then the main air supply is slowly opened, the pressure of the main air supply is regulated to 0.6MPa by the first pressure reducer 100, the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa, the main air supply is conveyed to each first valve port 111, and the main air supply is output through the oxygen output port, and then the operation is repeated.
In another technical scheme, in the central oxygen supply system, the number of the L-shaped pneumatic three-way ball valves 110 is two, and two L-shaped pneumatic three-way ball valves 110 are arranged, so that when one valve is damaged, the other valve can be continuously used.
In another technical scheme, 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 (the valve noise is reduced while the flow is increased by adopting a two-way structure), and the fourth air pipes 181 are positioned between the tail ends of the first air pipes 120 and the first valve ports 111;
the central oxygen supply system further comprises:
two second pressure reducers 190 respectively provided on the two fourth air pipes 181;
Two first check valves 200 are respectively provided on the two fourth air pipes 181 and respectively located between the second pressure reducers 190 corresponding thereto and the respective first valve ports 111 to prevent cross air.
The two second pressure reducers 190 depressurize the gas in the fourth gas pipe 181 to 0.8MPa, and then deliver the depressurized gas to the respective first valve ports 111.
After the system is powered on, the controller controls the first electrically-controlled 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 meanwhile, converts the collected signals into relevant information and outputs the relevant information to the display panel.
The pressure of the standby air source is regulated to 0.8MPa, then the main air supply is slowly opened, the air pressure in the first air pipe 120 is regulated to 0.6MPa through the first pressure reducer 100 (the air pressure reaches the opening pressure of the L-shaped pneumatic three-way ball valve 110 by 0.3-0.8 MPa), the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), then the air in the fourth air pipe 181 corresponding to the third valve port is respectively depressurized to 0.8MPa through the two second pressure reducers 190, and then the air is conveyed to each first valve port 111, the main air supply is output through an oxygen output port, and the first pressure transmitter 170 detects that the air pressure is 0.8MPa.
In another aspect, the central oxygen supply system further includes:
An oxygen purity analyzer 210;
A fifth gas pipe 220 having one end connected to a portion of the first gas pipe 120 located between the first pressure reducer 100 and the first electrically operated valve 130 and the other end connected to the oxygen purity analyzer 210;
a third pressure reducer 230 provided on the fifth air pipe 220;
A second electrically controlled valve 240 is provided on the fifth gas pipe 220 and is located between the third pressure reducer 230 and the oxygen purity analyzer 210.
After the system is powered on, the controller controls the first electrically controlled valve 130 and the second electrically controlled 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 meanwhile, converts the collected signals into relevant information and outputs the relevant information to the display panel.
The third pressure reducer 230 reduces the pressure of the gas in the fifth gas pipe 220 to a pressure that can be received by the oxygen purity analyzer 210, and then performs purity analysis by the oxygen purity analyzer 210.
In another aspect, in the central oxygen supply system, the oxygen purity analyzer 210 is connected to a controller, the oxygen purity analyzer 210 continuously transmits the detected information to the controller, and the controller is connected to the alarm, the voice module and the DTU module. When the controller judges that the oxygen concentration is lower than a set value (such as 99.5%), the controller controls the alarm to give an alarm, sends out a prompt tone through the voice module, simultaneously sends information to the platform of the Internet of things, and contacts related responsible persons through a mobile phone, a short message and the like, so that alarm information is sent out in a short range and a long range at the same time, and the responsible persons can conveniently and rapidly process faults.
The controller collects the pressure of the main air supply source in real time through the second pressure transmitter 280, and collects the pressure of the standby air supply source in real time through the third pressure transmitter 330, when the pressure of the main air supply source or the standby air supply source is lower than a set value (such as 0.4 MPa) or higher than the set value (such as 0.9 MPa), the controller controls the alarm to alarm, and sends out prompt tones through the voice module, and meanwhile, information is sent to the Internet of things platform, related responsible persons are contacted simultaneously through modes such as a mobile phone, a short message and the like, alarm information is sent out at the same time in a short-range and long-range mode, and the responsible persons can conveniently and rapidly process faults.
After the system is powered on, the controller controls the first electrically controlled valve 130 and the second electrically controlled 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 meanwhile, converts the collected signals into relevant information and outputs the relevant information to the display panel.
The pressure of the standby air source is regulated to 0.8MPa, then the main air supply is slowly opened, the air pressure in the first air pipe 120 is regulated to 0.6MPa through the first pressure reducer 100 (the air pressure reaches the opening pressure of the L-shaped pneumatic three-way ball valve 110 by 0.3-0.8 MPa), the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at the moment, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa, the main air supply is conveyed to each first valve port 111, the main air supply is output through an oxygen output port, and the first pressure transmitter 170 detects that the air pressure is 0.8MPa.
When the second pressure transmitter 280 detects that the main supply pressure is below a set point (e.g., 0.4 MPa) (indicating that the main supply is insufficient) and the third pressure transmitter 330 detects that the backup supply pressure is above a set point (e.g., 0.4 MPa) (indicating that the backup supply can be used), or when the second pressure transmitter 280 detects that the main supply pressure is below a set point (e.g., 0.4 MPa) (indicating that the main supply is insufficient), the oxygen purity analyzer 210 detects that the oxygen purity is below a set point (e.g., 99.5%), and the third pressure transmitter 330 detects that the backup supply pressure is above a set point (e.g., 0.4 MPa) (indicating that the backup supply can be used), or when the second pressure transmitter 280 detects that the pressure of the main air supply is higher than a set value (e.g. 0.4 MPa), the oxygen purity analyzer 210 detects that the oxygen purity is lower than a set value (e.g. 99.5%), and the third pressure transmitter 330 detects that the pressure of the standby air supply is higher than a set value (e.g. 0.4 MPa) (which indicates that the standby air supply can be used), the controller controls the first electrically-controlled valve 130 to be closed, the solenoid valve type air outlet valve 150 to be opened for air release, and when the pressure of the air 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 paths so that each third valve port 113 is communicated with the corresponding second valve port 112 (as shown in fig. 3), and then the main air supply is switched to the standby air supply. The standby gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.
When the main air supply is recovered, the first electrically-controlled valve 130 is opened, then the main air supply is slowly opened, the pressure of the main air supply is regulated to 0.6MPa by the first pressure reducer 100, the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa, the main air supply is conveyed to each first valve port 111, and the main air supply is output through the oxygen output port, and then the operation is repeated.
In another embodiment, in the central oxygen supply system, the gas output pipe 160 is further provided with a flow meter 250, and the flow meter 250 is located between each third valve 113 and the first pressure transmitter 170.
In another embodiment, in the central oxygen supply system, the second air pipe 140 is further provided with a manual air outlet valve 260. When the power is cut, the first electrically-controlled valve 130 can be manually closed, and the manual exhaust valve 260 can be opened for air leakage.
In another aspect, the central oxygen supply system further includes:
a first shut-off valve 270 is provided at one end of the third gas pipe 180 between the second pressure transmitter 280 and the outlet of the main gas supply.
After the system is powered on, the controller controls the first electrically-controlled valve 130 to open, 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 to be output to the display panel.
The pressure of the standby gas source is adjusted to 0.8MPa, then the first stop valve 270 is slowly opened, the gas pressure in the first gas pipe 120 is adjusted to 0.6MPa by the first pressure reducer 100, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main gas supply source is adjusted to 0.8MPa by the two second pressure reducers 190, and then the main gas supply source is delivered to each first valve port 111, the main gas supply source is delivered through the oxygen outlet, and the first pressure transmitter 170 detects that the gas pressure is 0.8MPa.
When the second pressure transmitter 280 detects that the pressure of the main air supply is lower than a set value (e.g., 0.4 MPa) (which indicates that the main air supply is insufficient), and the third pressure transmitter 330 detects that the pressure of the standby air supply is higher than the set value (e.g., 0.4 MPa) (which indicates that the standby air supply can be used), the controller controls the first electrically-controlled valve 130 to be closed, the solenoid valve type air outlet valve 150 to be opened for air leakage, and when the air 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 paths so that each third valve port 113 is communicated with the corresponding second valve port 112 (as shown in fig. 3), and then the main air supply is switched to the standby air supply. The standby gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.
When the main air supply is recovered, the first electrically-controlled valve 130 is opened, then the main air supply is slowly opened, the pressure of the main air supply is regulated to 0.6MPa by the first pressure reducer 100, the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa, the main air supply is conveyed to each first valve port 111, and the main air supply is output through the oxygen output port, and then the operation is repeated.
In another embodiment, in the central oxygen supply system, the middle part of the standby air supply input pipe 290 is composed of two seventh air pipes 291 connected in parallel;
a fourth pressure reducer 300 provided on one end of the standby air supply input pipe 290;
two second check valves 310 provided on the two seventh air pipes 291, respectively, between the fourth pressure reducer 300 and the respective second valve ports 112;
A second shut-off valve 320 is provided on the alternate air supply input 290 between the air outlet of the alternate air supply and the fourth pressure reducer 300.
After the system is powered on, the controller controls the first electrically controlled 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 to be output to the display panel.
The fourth pressure reducer 300 was adjusted to adjust the pressure to 0MPa, after which the busbar backup cylinder valve was opened, and then the second shut-off valve 320 was slowly opened, and the fourth pressure reducer 300 was adjusted to adjust the backup gas source pressure to 0.8MPa.
The first stop valve 270 is slowly opened, the pressure of the gas in the first gas pipe 120 is regulated to 0.6MPa by the first pressure reducer 100, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), then the pressure of the main gas supply source is regulated to 0.8MPa by the two second pressure reducers 190, and then the main gas supply source is delivered to each first valve port 111, and the main gas supply source is output through the oxygen output port, and the first pressure transmitter 170 detects that the pressure of the gas is 0.8MPa.
When the second pressure transmitter 280 detects that the pressure of the main air supply is lower than a set value (e.g., 0.4 MPa) (which indicates that the main air supply is insufficient), and the third pressure transmitter 330 detects that the pressure of the standby air supply is higher than the set value (e.g., 0.4 MPa) (which indicates that the standby air supply can be used), the controller controls the first electrically-controlled valve 130 to be closed, the solenoid valve type air outlet valve 150 to be opened for air leakage, and when the air 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 paths so that each third valve port 113 is communicated with the corresponding second valve port 112 (as shown in fig. 3), and then the main air supply is switched to the standby air supply. The standby gas source is output through the oxygen output port, and the gas pressure is restored to 0.8MPa.
When the main air supply is recovered to be normal, the first electric regulating valve 130 is opened, then the main air supply is slowly opened, the pressure of the main air supply is regulated to 0.6MPa by the first pressure reducer 100, the operation of the L-shaped pneumatic three-way ball valve 110 is controlled by the air supply, at this time, each third valve port 113 is communicated with the corresponding first valve port 111 (as shown in fig. 2), after that, the pressure of the main air supply is regulated to 0.8MPa by the two second pressure reducers 190, the main air supply is conveyed to each first valve port 111, and the main air supply is output through the oxygen output port and then is repeated.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
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| CN108730762B (en) * | 2018-08-03 | 2023-10-13 | 容县康瑞医疗器械有限公司 | Uninterrupted air supply device |
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