Needle valve and oxygen supply system

Abstract

An oxygen supply system includes an oxygen generating pipeline, which is used to transmit oxygen from an oxygen source to the oxygen generating pipeline; a needle valve flow control mechanism, which includes a needle valve and a needle valve controller, wherein the air inlet end of the needle valve is connected to the oxygen generating pipeline, and the air outlet end is connected to the oxygen transmission pipeline; the needle valve controller is connected to the motor electrical signal to control the opening and closing of the needle valve to control the output oxygen flow; the oxygen transmission pipeline, the air inlet end is connected to the air outlet end of the needle valve, and the other end is output; an ultrasonic tube detection mechanism is arranged in the oxygen transmission pipeline, which is used to detect the oxygen flow and oxygen concentration in the oxygen transmission pipeline. The oxygen flow transmitted from the oxygen generating pipeline to the oxygen transmission pipeline is accurately controlled, and the oxygen flow data in the oxygen transmission pipeline is detected, and the data is dynamically collected. The needle valve flow adjustment data is adjusted according to the real-time flow data to adjust the opening and closing of the needle valve to meet the set flow, so as to avoid the user from not being able to obtain sufficient oxygen and the harm caused by excessive oxygen.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen and ventilator equipment, and in particular to a needle valve and an oxygen supply system. Background Art

[0002] The main purpose of oxygen therapy is to correct hypoxemia in the human body, reduce the work of breathing and relieve the heart load, prevent and reverse tissue damage and organ dysfunction caused by hypoxia, and try to maintain the patient's ability to move. The main risks of oxygen therapy are failure to effectively correct hypoxemia, aggravation of carbon dioxide retention, or improper oxygen therapy leading to side effects or harm such as continuous high oxygen state or oxygen poisoning in patients. At present, many experts in the medical community attach great importance to standardizing oxygen therapy, and have successively issued expert consensus and included it in relevant clinical guidelines.

[0003] The 8th issue of Volume 31 of the Chinese Medical Information Guide published the article "On the Consensus and Controversy in Oxygen Therapy", which states: "During oxygen therapy, is the higher the blood oxygen saturation, the better? In theory, oxygen therapy is the same as other treatment measures. If the treatment results exceed the normal range allowed by the body, it will cause harm, and in severe cases, it may even endanger life. For example, in the intensive care unit (ICU), the patient's arterial oxygen saturation (SaO2) monitoring value is often 100%, but when SaO2 is 100%, the arterial oxygen partial pressure (PaO2) can reach any value of 100 to 500 mmHg (1 mmHg=0.133 kPa). PaO2>100 mmHg has exceeded the blood oxygen range of healthy people, and PaO2>120 mmHg is called "hyperoxemia". Such high blood oxygen that exceeds the patient's needs and tolerance is undoubtedly harmful, and this harm and deprivation of life have been confirmed by many clinical studies.

[0004] "Avoiding the Hazards of Hyperoxia and Regulating Targeted Oxygen Therapy" in Volume 31, Issue 8, August 2015, "Oxygen administration, like drug therapy, needs to evaluate its therapeutic effect and safety. Effective and safe oxygen therapy is the best oxygen therapy, which needs to be achieved through targeted oxygen therapy. Promoting targeted oxygen therapy is by no means just to save oxygen. Its practical significance and value far exceed the economic value of oxygen as a medical resource. The important thing is to reduce the damage of hyperoxia and protect the lives of critically ill patients.

[0005] In summary, correcting hypoxemia, avoiding hyperxemia, and achieving target oxygen therapy are of great clinical significance. Technically, it mainly depends on accurately adjusting the oxygen flow rate and providing the inhaled oxygen concentration on demand. The existing technology obtains the oxygen flow rate through a flow meter and controls the oxygen output through a needle valve. The problems are poor accuracy and inability to dynamically adjust. The existing needle valve has a complex structure and low accuracy.

[0006] Therefore, it is necessary to provide an oxygen supply system with high regulation efficiency, high precision, safety and reliability. Summary of the invention

[0007] The purpose of the present invention is to overcome the problems existing in the prior art and to provide an oxygen supply system with high regulation efficiency, high precision, safety and reliability.

[0008] The technical solution of the present invention is as follows:

[0009] A needle valve comprises a motor, a linkage mechanism, a screw rod, a plug and a valve core. The motor drives the screw rod to rotate through the linkage mechanism, and the screw rod drives the plug arranged on the screw rod to move axially to adjust the air intake clearance of the valve core.

[0010] Among them, the linkage mechanism includes a first transmission member and a second transmission member, one end of the first transmission member is drivingly connected to the output shaft of the motor, the first transmission member is drivingly connected to the second transmission member in a loose fit, and one end of the second transmission member is drivingly connected to the screw.

[0011] The first transmission member is provided with a plug-in, and the second transmission member is correspondingly provided with a socket. When the first transmission member is connected with the second transmission member, the plug-in is inserted into the socket.

[0012] Wherein, a gap is arranged between the first transmission member and the second transmission member.

[0013] An oxygen supply system using the needle valve comprises:

[0014] An oxygen generation pipeline, used for transmitting oxygen from an oxygen source to the oxygen generation pipeline;

[0015] The needle valve flow control mechanism includes a needle valve controller, the air inlet end of the needle valve is connected to the oxygen generation pipeline, the air outlet end is connected to the oxygen transmission pipeline, the needle valve controller is connected to the motor electrical signal, and controls the opening and closing of the needle valve to control the output oxygen flow;

[0016] The oxygen transmission pipeline has the air inlet connected to the air outlet of the needle valve and the other end outputs.

[0017] The ultrasonic tube detection mechanism is arranged in the oxygen transmission pipeline and is used to detect the oxygen flow and oxygen concentration in the oxygen transmission pipeline.

[0018] Among them, the ultrasonic tube detection mechanism includes an ultrasonic tube, which detects the oxygen flow data in the detection pipeline and transmits the oxygen flow data to the needle valve controller. The needle valve controller adjusts the needle valve according to the real-time oxygen flow data emitted by the ultrasonic tube to make the oxygen flow in the channel consistent with the set oxygen flow.

[0019] Among them, it also includes a ventilator, the output end of the oxygen transmission pipeline is connected to the oxygen interface of the ventilator, and the ventilator is connected to the user end.

[0020] Among them, it also includes an output pipeline, the output end of the oxygen transmission pipeline is connected to the output pipeline, and the output end of the output pipeline is connected to the user end.

[0021] It also includes a pressure reducing valve, which is arranged in the oxygen generating pipeline and is used to control the pressure in the oxygen generating pipeline.

[0022] It also includes a setting module and a controller. The setting module is connected to the controller by electrical signals and is used to input oxygen inhalation hours, oxygen flow rate, and oxygen concentration into the controller. The controller controls the needle valve controller and the oxygen source output according to the input oxygen inhalation time and oxygen flow rate data.

[0023] Beneficial effects:

[0024] An oxygen supply system, characterized in that:

[0025] An oxygen generation pipeline, used for transmitting oxygen from an oxygen source to the oxygen generation pipeline;

[0026] The needle valve flow control mechanism includes a needle valve and a needle valve controller. The air inlet end of the needle valve is connected to the oxygen generation pipeline, and the air outlet end is connected to the oxygen transmission pipeline. The needle valve controller is connected to the motor electrical signal to control the opening and closing of the needle valve to control the output oxygen flow.

[0027] The oxygen transmission pipeline has the air inlet connected to the air outlet of the needle valve and the other end outputs.

[0028] The ultrasonic tube detection mechanism is arranged in the oxygen transmission pipeline and is used to detect the oxygen flow and oxygen concentration in the oxygen transmission pipeline.

[0029] A needle valve flow control mechanism is used to accurately control the oxygen flow rate transmitted from the oxygen generation pipeline to the oxygen transmission pipeline. An ultrasonic tube detection mechanism is used to detect the oxygen flow data in the oxygen transmission pipeline. The data is dynamically collected, and the needle valve flow adjustment data is adjusted according to the real-time flow data to adjust the opening and closing of the needle valve to meet the set flow rate, thereby preventing users from not getting enough oxygen and avoiding the harm caused by excessive oxygen.

[0030] The motor is used as a driving mechanism, and the forward and reverse rotation of the motor can be accurately controlled, and the number of rotations can be accurately controlled. The linkage mechanism and the screw rod convert the circular motion of the motor into linear motion. The screw rod has extremely high precision and can very accurately control the opening and closing degree of the valve core, so that the valve core can accurately control the flow rate of oxygen. The transmission of the motor and the screw rod improves the control accuracy of the entire needle valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the needle valve flow control mechanism of the present invention.

[0032] Figure 2 It is a schematic diagram of the combination of the needle valve flow control mechanism and the ultrasonic tube measurement mechanism of the present invention.

[0033] Figure 3 It is a structural schematic diagram of the oxygen flow control system of the steady flow cavity of the present invention.

[0034] Figure 4 It is a schematic structural diagram of embodiment 2 of the present invention.

[0035] Figure 5 It is a schematic structural diagram of embodiment 3 of the present invention.

[0036] Figure 6 It is a schematic structural diagram of the needle valve of the present invention.

[0037] Figure 7 It is a structural schematic diagram of the needle valve of the present invention from another perspective.

[0038] Figure 8 The present invention Figure 7 AA section view.

[0039] The following are the descriptions of the reference numerals:

[0040] 1 - motor, 2 - first transmission member, 3 - second transmission member, 4 - screw rod, 5 - plug, 6 - housing, 7 - hole, 8 - claw, 9 - air outlet, 10 - air inlet, 11 - valve core, 12 - gap, 13 - needle valve, 14 - oxygen generation pipeline, 15 - delivery pipeline, 16 - oxygen transmission pipeline, 17 - steady flow cavity, 18 - ultrasonic tube detection mechanism, 19 - pressure reducing valve, 20 - oxygen source, 21 - ventilator. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] Example 1

[0043] An oxygen supply system comprising

[0044] The oxygen generating pipeline 14 is used to transmit the oxygen from the oxygen source 20 to the oxygen generating pipeline 14;

[0045] The needle valve flow control mechanism includes a needle valve 13 and a needle valve controller. One end of the needle valve 13 is connected to the oxygen generating pipeline 14, and the other end is provided with an output end. The needle valve controller controls the opening and closing of the needle valve 13 to control the output oxygen flow rate.

[0046] The oxygen transmission pipeline 16 has one end connected to the output end of the needle valve 13 and the other end outputted. The oxygen transmission pipeline 16 is provided with an ultrasonic tube detection mechanism 18 for detecting the oxygen flow in the oxygen transmission pipeline 16;

[0047] The needle valve controller controls the output of the oxygen flow rate according to the set flow rate data. The ultrasonic tube detection mechanism 18 measures the oxygen flow rate data in the oxygen transmission pipeline 16 and sends it to the needle valve controller.

[0048] The present invention uses a needle valve controller to adjust the needle valve 13 to accurately control the oxygen in the oxygen generation pipeline 14 to be transmitted to the oxygen transmission pipeline 16, and can be accurately controlled according to parameters such as time and flow rate. The ultrasonic tube detection mechanism 18 detects the flow rate and concentration information of the oxygen in the oxygen transmission pipeline 16, and provides real-time feedback. The needle valve controller receives the real-time feedback flow rate information, adjusts the oxygen flow rate, receives the time information, opens or closes the oxygen transmission pipeline 16, and accurately supplies oxygen to ensure the oxygen supply effect. The input end of the oxygen transmission pipeline 16 is provided with a flow stabilizing cavity 17, the output end of the needle valve 13 is connected to the air inlet end of the flow stabilizing cavity 17, and the output end of the flow stabilizing cavity 17 is connected to the input end of the ultrasonic tube detection mechanism 18.

[0049] The flow-stabilizing cavity 17 plays the role of temporarily accommodating oxygen. The oxygen is pressurized and output, and the output is controlled by the needle valve 13. When the oxygen is in the oxygen generating pipeline 14 to the oxygen transmission pipeline 16, the pressure is different. The oxygen gas enters the pipeline in a continuous form with a relatively high pressure. After being output through the needle valve 13, it is directly discharged and will produce more shocks, which will affect the measurement accuracy of the ultrasonic tube measurement sensor, and will cause shocks in the ultrasonic flow velocity measurement and the ultrasonic oxygen concentration measurement. The measurement accuracy is not high. The design of the flow-stabilizing cavity 17 is added, so that oxygen is first filled into the flow-stabilizing cavity 17. The volume of the flow-stabilizing cavity 17 is larger than the volume of the pipeline. Therefore, the fluctuation of oxygen will be eliminated in the flow-stabilizing cavity 17, and then continue to be output steadily to the detection area of ​​the ultrasonic tube detection mechanism 18, thereby improving the detection accuracy and thus improving the control accuracy.

[0050] The flow stabilizing cavity of the present invention can be a bacteria filter with a cavity, a water-gas separator with a cavity, a measuring instrument with a cavity, a pipeline with a cavity, etc., and any one that can achieve the above-mentioned flow stabilizing effect can be used.

[0051] The ultrasonic tube detection mechanism 18 includes an ultrasonic tube, which detects oxygen flow data in the detection pipeline and transmits the oxygen flow data to a needle valve controller. The needle valve controller adjusts the needle valve 13 according to the real-time oxygen flow data emitted by the ultrasonic tube to keep the oxygen flow in the channel consistent with the set oxygen flow.

[0052] The present invention utilizes the ultrasonic tube to detect flow data and feeds it back to the needle valve controller, thereby dynamically controlling the oxygen flow and oxygen supply time in the oxygen transmission pipeline 16, which can effectively improve the accuracy of oxygen supply.

[0053] The device further comprises a pressure reducing valve 19 , which is disposed in the oxygen generating pipeline 14 and is used to control the pressure in the oxygen generating pipeline 14 .

[0054] The needle valve 13 includes a motor 1, a linkage mechanism, a screw rod 4, a plug 5 and a valve core 11. The needle valve controller is connected to the motor 1 by electrical signals to control the rotation of the motor 1. The motor 1 drives the screw rod 4 to rotate through the linkage mechanism. The screw rod 4 drives the plug 5 set on the screw rod 4 to move axially to adjust the air intake gap 12 of the valve core 11.

[0055] The motor 1 is used as a driving mechanism, and the needle valve controller can accurately control the forward and reverse rotation of the motor 1 and the number of rotations. The linkage mechanism and the screw rod 4 convert the circular motion of the motor 1 into linear motion. The screw rod 4 has extremely high precision and can very accurately control the opening and closing degree of the valve core 11, so that the valve core 11 can accurately control the flow rate of oxygen. The transmission of the motor 1 and the screw rod 4 improves the control accuracy of the entire needle valve 13.

[0056] The linkage mechanism includes a first transmission member 2 and a second transmission member 3, one end of the first transmission member 2 is drivingly connected to the output shaft of the motor 1, the first transmission member 2 is drivingly connected to the second transmission member 3 in a loose fit, and one end of the second transmission member 3 is drivingly connected to the screw 4.

[0057] Generally, the transmission member can be set as a circular turntable or flange, and the first transmission member 2 drives the second transmission member 3 to move. Any method that can drive the second transmission member 3 to move can be adopted; for example, the first transmission member 2 is provided with a plug-in, and the second transmission member 3 is correspondingly provided with a socket 7. When the first transmission member 2 is connected with the second transmission member 3, the plug-in is inserted into the socket 7. The plug-in is set as a claw 8 and can be inserted into the socket.

[0058] A gap 12 is provided between the first transmission member 2 and the second transmission member 3. The first transmission member 2 and the second transmission member 3 are loosely connected, and a gap 12 is provided between them. When the first transmission member 2 and the second transmission member 3 move, the gap 12 offsets the transmission error between them, making installation more convenient and transmission more accurate.

[0059] The linkage mechanism of the present invention is easy to produce and process, and has extremely low cost. The setting of the linkage mechanism enables the needle valve 13 and the motor 1 to transmit rotational force even when there is a small amount of different axes or a small deviation angle, and hardly affects the accuracy, thereby reducing the difficulty of processing and assembly, including deviation and wear during use, and is not easy to affect the accuracy; it is easy to assemble and has a longer service life.

[0060] The housing 6 is provided with an air inlet 10 and an air outlet 9, the air inlet 10 is connected to the valve core 11, the plug 5 is driven by a screw rod 4 to extend into or out of the valve core 11, and the gap 12 between the valve core 11 and the plug 5 is the air inlet gap 12. The air intake of the valve core 11 is adjusted by the movement of the plug 5, and the air outlet end of the valve core 11 is connected to the air outlet 9.

[0061] Example 2

[0062] The difference between Example 2 and Example 1 is that:

[0063] The solution of the present invention can also be connected to a ventilator 21 , and the output end of the oxygen transmission pipeline 16 is connected to the oxygen interface of the ventilator 21 , and is connected to the user end through the ventilator 21 .

[0064] The oxygen supply system of the present invention can work in conjunction with the ventilator 21 and transmit oxygen to the patient through the ventilator 21, superimposing the functions of the ventilator 21, and can better adapt to the needs of the patient and meet medical use.

[0065] like Figure 4 As shown, the air inhaled by the air inlet 10 of the ventilator 21 is mixed, and mixed into an air-oxygen mixed gas of a certain concentration according to the amount of oxygen delivered by the oxygen supply system. This method is conducive to mixing an air-oxygen mixed gas that requires a high concentration. The oxygen supply system can provide the required oxygen flow rate according to the target value, and can also provide the corresponding oxygen flow rate according to the user's target blood oxygen saturation value (range).

[0066] Example 3

[0067] The difference between Example 3 and Example 1 and Example 2 is that:

[0068] The solution of the present invention can be directly output to the user end and connected to a mask, nasal catheter or other oxygen inhalation equipment. The ventilator 21 can share the output pipeline 15 with the output end of the oxygen transmission pipeline 16. The output end of the oxygen transmission pipeline 16 is connected to the output pipeline 15, the output end of the output pipeline 15 is connected to the user end, and the ventilator 21 is connected to the output pipeline.

[0069] The oxygen supply system of the present invention can be used directly, or it can be used together with a ventilator 21 by using an output pipeline for patients. Figure 5As shown, this method is simple and easy to use and is applicable to all ventilators 21, but it can only be used for users who need a lower concentration of air-oxygen mixed gas. When the user needs a high concentration of air-oxygen mixed gas, a large flow of oxygen needs to be connected to the oxygen supply system. The oxygen supply system can provide the required oxygen flow according to the target value, or it can provide the corresponding oxygen flow according to the user's target blood oxygen saturation value (range).

[0070] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An oxygen supply system, Features: include An oxygen generation pipeline, used for transmitting oxygen from an oxygen source to the oxygen generation pipeline; The needle valve flow control mechanism includes a needle valve and a needle valve controller. The air inlet end of the needle valve is connected to the oxygen generation pipeline, and the air outlet end is connected to the oxygen transmission pipeline. The needle valve controller is connected to the motor electrical signal to control the opening and closing of the needle valve to control the output oxygen flow. The oxygen transmission pipeline has the air inlet connected to the air outlet of the needle valve and the other end outputs. An ultrasonic tube detection mechanism is provided in the oxygen transmission pipeline and is used to detect the oxygen flow rate and oxygen concentration in the oxygen transmission pipeline; The needle valve comprises a motor, a linkage mechanism, a screw rod, a plug and a valve core. The motor drives the screw rod to rotate through the linkage mechanism, and the screw rod drives the plug arranged on the screw rod to move axially to adjust the air intake clearance of the valve core. The linkage mechanism comprises a first transmission member and a second transmission member, one end of the first transmission member is drivingly connected to the output shaft of the motor, the first transmission member is drivingly connected to the second transmission member in a loose fit, and one end of the second transmission member is drivingly connected to the screw rod; The first transmission member is provided with a plug-in, and the second transmission member is correspondingly provided with a socket, and when the first transmission member is connected with the second transmission member, the plug-in is inserted into the socket; A gap is provided between the first transmission member and the second transmission member.

2. An oxygen supply system according to claim 1, Features: The ultrasonic tube detection mechanism includes an ultrasonic tube, which detects oxygen flow data in the pipeline and transmits the oxygen flow data to a needle valve controller. The needle valve controller adjusts the needle valve according to the real-time oxygen flow data emitted by the ultrasonic tube to keep the oxygen flow in the channel consistent with the set oxygen flow.

3. An oxygen supply system according to claim 1 or 2, Features: A flow stabilizing cavity is arranged between the needle valve and the ultrasonic tube detection mechanism. The flow stabilizing cavity is arranged in the oxygen transmission pipeline. The volume of the flow stabilizing cavity is greater than the volume of the tube diameter.

4. An oxygen supply system according to claim 3, Features: At least two flow stabilizing cavities are provided, and the plurality of flow stabilizing cavities are connected in series in sequence.

5. An oxygen supply system according to claim 1, Features: It also includes a ventilator, the output end of the oxygen transmission pipeline is connected to the oxygen interface of the ventilator, and the ventilator is connected to the user end.

6. An oxygen supply system according to claim 1, Features: It also includes an output pipeline, the output end of the oxygen transmission pipeline is connected to the output pipeline, and the output end of the output pipeline is connected to the user end.

7. An oxygen supply system according to claim 1, Features: It also includes a pressure reducing valve, which is arranged in the oxygen generating pipeline and is used to control the pressure in the oxygen generating pipeline.

8. An oxygen supply system according to claim 1, Features: It also includes a setting module and a controller. The setting module is connected to the controller by electrical signals and is used to input oxygen inhalation hours, oxygen flow rate, and oxygen concentration into the controller. The controller controls the needle valve controller and the oxygen source output according to the input oxygen inhalation time and oxygen flow rate data.

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