Medical gas system calibration device

Abstract

The utility model relates to a medical gas system calibration device which comprises a test module, a control module and a display module, and the control module is connected with the display module. The testing module comprises a testing pipe and a testing assembly, the testing pipe comprises a main pipe and a first branch pipe, the testing assembly comprises a flow meter, a particle counter and an oxygen measuring probe, one end of the main pipe is a positive pressure connecting end, the other end of the main pipe is a negative pressure connecting end, the flow meter is arranged in the main pipe, and a control valve is further arranged on the main pipe part between the flow meter and the positive pressure connecting end; one end of the first branch pipe is communicated with the side face of the positive pressure connecting end of the main pipe, the other end of the first branch pipe is a particle counter connector and is connected with a particle technical device, and a normally-closed first electromagnetic valve is arranged on the first branch pipe; the flow meter, the first electromagnetic valve and the oxygen measuring probe are all connected with the control module. The device is high in integration degree, calibration efficiency can be greatly improved, and field calibration of a centralized oxygen supply system, a centralized suction system and an air supply system in a medical gas system is achieved.

Description

Technical Field

[0001] This utility model relates to the field of calibration equipment technology, and more specifically, to a calibration device for a medical gas system. Background Technology

[0002] Medical gas systems are core life support systems in hospitals, responsible for providing safe and stable medical gases and negative pressure suction services to patients and medical equipment. Medical gas systems mainly include central oxygen supply systems, central suction systems, and medical air systems. Many parameters involved in medical gas systems, such as pressure, flow rate, humidity, temperature, dust particle count, and oxygen concentration, require on-site calibration. If metrology and calibration technicians need to simultaneously test the central oxygen supply system, central suction system, and medical air system, they need to carry multiple sets of general-purpose testing equipment, which is inconvenient. Therefore, this invention proposes a novel medical gas system calibration device to solve the above problems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a medical gas system calibration device with a high degree of integration, which can significantly improve calibration efficiency and enable on-site calibration of centralized oxygen supply, centralized suction, and air supply systems in medical gas systems.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A medical gas system calibration device includes a testing module, a control module, and a display module, wherein the control module is connected to the display module;

[0006] The testing module includes a test tube and test components. The test tube includes a main pipe and a first branch pipe. The test components include a flow meter, a particle counter, and an oxygen probe. One end of the main pipe is a positive pressure connection end, and the other end is a negative pressure connection end. The flow meter is installed in the main pipe, and a control valve is also installed on the main pipe section between the flow meter and the positive pressure connection end. One end of the first branch pipe is connected to the side of the positive pressure connection end of the main pipe, and the other end of the first branch pipe is a particle counter connector, which is connected to the particle detector. A normally closed first solenoid valve is installed on the first branch pipe. The flow meter, the first solenoid valve, and the oxygen probe are all connected to the control module.

[0007] In one embodiment, the control valve is a needle valve used to finely adjust the gas flow rate passing through the flow meter.

[0008] In one embodiment, the test assembly further includes a pressure sensor disposed in the main pipe between the positive pressure connection and the control valve. The pressure sensor is connected to the control module and is used to detect gas pressure.

[0009] In one embodiment, the test component further includes a temperature sensor connected to the control module for detecting ambient temperature.

[0010] In one embodiment, the test assembly further includes a humidity sensor disposed in the main pipe between the positive pressure connection and the control valve. The humidity sensor is connected to the control module and is used to detect the humidity of the gas.

[0011] In one embodiment, the test tube further includes a second branch tube, one end of which is connected to the positive pressure connection side of the main tube, and the other end of which is a closed end. A humidity sensor is disposed on the second branch tube.

[0012] In one embodiment, the second branch pipe is also provided with a normally closed second solenoid valve. A humidity sensor is located between the closed end of the second branch pipe and the second solenoid valve. The second solenoid valve is connected to the control module and is opened when the humidity of the gas needs to be tested.

[0013] In one embodiment, the display module is a display screen.

[0014] In summary, this utility model has the following beneficial effects:

[0015] This invention enables full-item calibration and measurement through a single connection, exhibiting a high degree of integration. Its simple and reliable structure, low cost, and ability to significantly improve calibration efficiency allow for on-site calibration of centralized oxygen supply, centralized suction, and air supply systems in medical gas systems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the present invention.

[0017] In the diagram: 1. Test module, 2. Control module, 3. Display module, 101. Main pipe, 102. Flow meter, 103. Control valve, 104. Oxygen probe, 105. First branch pipe, 106. First solenoid valve, 107. Temperature sensor, 108. Pressure sensor, 109. Second branch pipe, 110. Second solenoid valve, 111. Humidity sensor, 112. Particle counter. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It is worth noting that the directional terms such as "up" and "down" used in this article are all relative to the perspective of the attached figures and are only for the purpose of description. They should not be interpreted as limitations on the technical solutions.

[0020] This invention proposes a medical gas system calibration device, comprising a test module 1, a control module 2, and a display module 3. The test module 1 is connected to the control module 2, and the control module 2 is connected to the display module 3 for displaying test results. In this invention, the control module 2 is a conventional control chip used to control the equipment in the device and process sensor signals, and the display module 3 is a conventional display screen; further details are omitted here.

[0021] like Figure 1 As shown, test module 1 includes a test tube and test components. The test tube includes a main pipe 101 and a first branch pipe 105. The test components include a flow meter 102, a particle counter 112, and an oxygen probe 104. One end of the main pipe 101 is a positive pressure connection end, and the other end of the main pipe 101 is a negative pressure connection end. The flow meter 102 is installed in the main pipe 101, and a control valve 103 is also installed on the part of the main pipe 101 between the flow meter 102 and the positive pressure connection end. One end of the first branch pipe 105 is connected to the side of the positive pressure connection end of the main pipe 101, and the other end of the first branch pipe 105 is a particle counter 112 connector, which is connected to the particle detector. A normally closed first solenoid valve 106 is installed on the first branch pipe 105. The flow meter 102, the first solenoid valve 106, and the oxygen probe 104 are all connected to the control module 2.

[0022] In some embodiments, the control valve 103 is a needle valve for finely adjusting the gas flow rate through the flow meter 102.

[0023] In some embodiments, the test assembly further includes a pressure sensor 108, which is disposed in the main pipe 101 portion between the positive pressure connection end and the control valve 103. The pressure sensor 108 is connected to the control module 2 and is used to detect gas pressure.

[0024] In some embodiments, the test assembly further includes a temperature sensor 107, which is connected to the control module 2 and is used to detect the ambient temperature.

[0025] In some embodiments, the test assembly further includes a humidity sensor 111, which is disposed in the main pipe 101 section between the positive pressure connection end and the control valve 103. The humidity sensor 111 is connected to the control module 2 and is used to detect the humidity of the gas.

[0026] In some embodiments, the test tube further includes a second branch tube 109, one end of which is connected to the positive pressure connection side of the main tube 101, and the other end of which is a closed end. A humidity sensor 111 is disposed on the second branch tube 109.

[0027] In some embodiments, the second branch pipe 109 is also provided with a normally closed second solenoid valve 110, and a humidity sensor 111 is disposed between the closed end of the second branch pipe 109 and the second solenoid valve 110. The second solenoid valve 110 is connected to the control module 2, and the second solenoid valve 110 is opened when it is necessary to test the humidity of the gas.

[0028] This utility model is applicable to the calibration of medical central oxygen supply systems, medical air systems, and medical central suction systems, as detailed below.

[0029] The medical central oxygen supply system is connected to the positive pressure connection terminal of main pipe 101. The calibration of the medical central oxygen supply system includes indoor oxygen concentration detection, terminal component pressure and pressure loss, and terminal component flow rate.

[0030] Indoor oxygen concentration detection: The oxygen concentration in the four corners and center of the liquid oxygen tank is read by the oxygen probe 104. The control module 2 processes the signal from the oxygen probe 104 and displays the corresponding data on the display module 3.

[0031] Indoor gas temperature detection: The indoor gas temperature is detected by temperature sensor 107, the control module 2 processes the signal from temperature sensor 107, and displays the corresponding data on display module 3;

[0032] Terminal component pressure and pressure loss: Close control valve 103 so that the oxygen output from the terminal component does not pass through flow meter 102, i.e., the flow rate is 0. After the pressure stabilizes, read the measured pressure value P1, which is the pressure of the terminal component of the medical central oxygen supply system; Adjust control valve 103 so that the oxygen output flow rate of the terminal component is 100 L / min. After the pressure stabilizes, read the measured pressure value P2. The absolute value of the difference between P1 and P2 is the pressure loss.

[0033] Terminal component flow detection: Adjust control valve 103 to maximize the output flow of the terminal component, and read the value measured by flow meter 102 to determine the flow rate of the terminal component.

[0034] The medical air system is connected to the positive pressure connection of main pipe 101. The calibration of the medical air system includes terminal component pressure and pressure loss, terminal component flow rate, moisture content detection and particulate matter level.

[0035] Terminal component pressure and pressure loss: Close control valve 103 so that the air output from the terminal component does not pass through flow meter 102, i.e., the flow rate is 0. After the pressure stabilizes, read the measured pressure value P1, which is the pressure of the terminal component of the medical air system; Adjust control valve 103 so that the air output flow rate of the terminal component is 100 L / min. After the pressure stabilizes, read the measured pressure value P2. The absolute value of the difference between P1 and P2 is the pressure loss.

[0036] Terminal component flow detection: Adjust control valve 103 to maximize the output flow of the terminal component, and read the value measured by flow meter 102 to measure the flow of the terminal component;

[0037] Moisture content detection: Close control valve 103, open second solenoid valve 110, measure the average value of pressure P and dew point T, calculate moisture content by referring to the table, and humidity sensor 111 detects air humidity.

[0038] Particulate matter grade: After the particle counter 112 is self-purified, connect it to the particle counter 112 connector of the first branch pipe 105, open the first solenoid valve 106, adjust the control valve 103 to make the flow rate reach 2.83 L / min, sample for 1 min, record the measured value, and determine the particle size grade.

[0039] The medical central suction system is connected to the negative pressure connection of the main pipe 101. The calibration of the medical central suction system includes the terminal component vacuum pressure and terminal component flow rate.

[0040] Terminal component vacuum pressure: Close control valve 103 so that the gas input to the terminal component does not pass through flow meter 102, i.e., the flow rate is 0. After the pressure stabilizes, read the measured pressure value P1, which is the vacuum pressure of the terminal component of the medical central suction system; Adjust control valve 103 so that the gas input flow rate to the terminal component is 85 L / min. After the pressure stabilizes, read the measured pressure value P2. P1 is the vacuum pressure of the terminal component, and P2 is the vacuum pressure measurement value of the adjacent terminal component.

[0041] Terminal component flow detection: Adjust control valve 103 to maximize the input flow of the terminal component, and read the value measured by flow meter 102 to determine the flow rate of the terminal component.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A medical gas system calibration device, characterized in that, It includes a test module (1), a control module (2) and a display module (3), with the control module (2) and the display module (3) connected together; The test module (1) includes a test tube and test components. The test tube includes a main pipe (101) and a first branch pipe (105). The test components include a flow meter (102), a particle counter (112), and an oxygen probe (104). One end of the main pipe (101) is a positive pressure connection end, and the other end of the main pipe (101) is a negative pressure connection end. The flow meter (102) is installed in the main pipe (101), and a control valve (103) is also installed in the part of the main pipe (101) between the flow meter (102) and the positive pressure connection end. One end of the first branch pipe (105) is connected to the side of the positive pressure connection end of the main pipe (101), and the other end of the first branch pipe (105) is a particle counter (112) connector, which is connected to the particle detector. A normally closed first solenoid valve (106) is installed on the first branch pipe (105). The flow meter (102), the first solenoid valve (106), and the oxygen probe (104) are all connected to the control module (2).

2. The medical gas system calibration device as described in claim 1, characterized in that, The control valve (103) is a needle valve used to finely adjust the gas flow rate through the flow meter (102).

3. The medical gas system calibration device as described in claim 1, characterized in that, The test assembly also includes a pressure sensor (108), which is located in the main pipe (101) between the positive pressure connection and the control valve (103). The pressure sensor (108) is connected to the control module (2) and is used to detect gas pressure.

4. The medical gas system calibration device as described in claim 1, characterized in that, The test assembly also includes a temperature sensor (107), which is connected to the control module (2) and is used to detect the ambient temperature.

5. The medical gas system calibration device as described in claim 1, characterized in that, The test assembly also includes a humidity sensor (111), which is located in the main pipe (101) between the positive pressure connection and the control valve (103). The humidity sensor (111) is connected to the control module (2) and is used to detect the humidity of the gas.

6. The medical gas system calibration device as described in claim 5, characterized in that, The test tube also includes a second branch tube (109), one end of which is connected to the side of the positive pressure connection end of the main tube (101), and the other end of the second branch tube (109) is a closed end. The humidity sensor (111) is installed on the second branch tube (109).

7. The medical gas system calibration device as described in claim 6, characterized in that, The second branch pipe (109) is also equipped with a normally closed second solenoid valve (110). The humidity sensor (111) is located between the closed end of the second branch pipe (109) and the second solenoid valve (110). The second solenoid valve (110) is connected to the control module (2). When it is necessary to test the humidity of the gas, the second solenoid valve (110) is opened.

8. The medical gas system calibration device as described in claim 1, characterized in that, The display module (3) is a display screen.

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