Breathing machine gas path detection device and detection system

Abstract

The invention discloses a breathing machine air path detection device and detection system, and relates to the technical field of medical instrument detection, the breathing machine air path detection device comprises a detection machine main body, a self-inspection inflation mechanism and a pneumatic plugging mechanism, and the self-inspection inflation mechanism comprises an air pump and a boosting mechanism. According to the invention, high-pressure airflow is accumulated and generated by boosting of the gas collection tank, and when the boosting of the gas collection tank reaches a set value, the arranged blocking valve plate is opened, so that the high-pressure airflow is conveniently released into the detection pipeline of the detection machine main body to detect whether blockage exists, and pipeline cleaning can be completed; and meanwhile, the pneumatic plugging mechanism operates by virtue of air pressure to plug the air inlet end and the air outlet end of the detection machine main body, and air injection is carried out to carry out air tightness detection, so that the functions of plugging of the detection machine main body, air tightness self-detection and the like are conveniently and continuously completed, the operation convenience and the accuracy of a breathing machine detection result are improved, and stable detection is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device detection, and in particular to a ventilator air path detection device and a detection system. Background Art

[0002] As an effective means of artificially replacing spontaneous ventilation function, ventilators have been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation. In order to ensure that the ventilators can meet the qualified standards before leaving the factory, they are generally required to be tested using testing equipment.

[0003] Existing ventilator detection equipment uses a pipe to connect to the air inlet end of the ventilator, then starts the ventilator, and then relies on different types of sensors such as air pressure, flow, temperature and humidity of the detection equipment to detect airflow-related parameters when the ventilator is running, and uploads the relevant parameters to the corresponding analysis system for analysis and comparison to determine whether the ventilator is operating normally.

[0004] The shortcomings of existing ventilator testing equipment are: in order to facilitate various sensors to detect and collect data, the ventilator testing equipment itself also has testing pipelines connected to the ventilator, including external pipelines and internal pipelines of the equipment. During the daily use of the testing equipment, some impurities will inevitably enter the pipelines, causing pipeline blockage or affecting gas flow, or the pipelines will be damaged and the air tightness will deteriorate due to wear and tear. At this time, if the ventilator is directly tested by the testing equipment, the test results will be inaccurate. Although there are also testing equipment that can perform self-tests, for different situations such as blockage, air tightness and pipeline cleaning, it is generally impossible to complete automatic and continuous self-tests. Manual operations need to be performed one by one, resulting in the self-test processing operation of the ventilator testing equipment being inconvenient and inefficient, and affecting the stable detection effect. Summary of the invention

[0005] The purpose of the present invention is to provide a ventilator gas circuit detection device and a detection system to solve the technical problem in the prior art that the ventilator detection equipment is not convenient to continuously and effectively complete self-test before detection, thereby affecting the detection effect.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions: A ventilator gas circuit detection device comprises a detection machine body, wherein the detection machine body is provided with a first air inlet box and a first air outlet box, wherein the first air inlet box and the first air outlet box are both connected with a detection pipeline, and the first air inlet box is connected to the air port end of the ventilator through the corresponding detection pipeline, and further comprises: A self-checking inflation mechanism, the self-checking inflation mechanism comprises an air pump and a boosting mechanism, the output end of the air pump is connected to a detection pipeline connected to the ventilator through the boosting mechanism, and a secondary flow sensor is installed in the first air outlet box; Pneumatic blocking mechanism, the pneumatic blocking mechanism is provided with two groups, and is used to block the first air inlet box and the first air outlet box respectively. The output end of the air pump is provided with a flow direction switching valve, and the output end of the air pump is also connected to the pneumatic blocking mechanism through the flow direction switching valve.

[0007] As a further solution of the present invention: the boosting mechanism includes an air collecting tank, a second air inlet box is provided on one side of the air collecting tank, and a second air outlet box is provided on the other side, the second air inlet box is connected to the output end of the air pump, the second air outlet box is connected to the detection pipeline, and a sealing valve plate is slidingly connected in the second air outlet box, and the flow direction switching valve is arranged in the second air inlet box.

[0008] As a further solution of the present invention: the flow direction switching valve includes a first electric telescopic rod and a conversion valve plate, the first electric telescopic rod is fixedly arranged on the outside of the air collecting tank, and a secondary air pressure sensor electrically connected to the first electric telescopic rod is installed in the air collecting tank, the conversion valve plate is arranged at the second air inlet box, and the conversion valve plate is cooperatively connected with the pneumatic sealing mechanism, and the sealing valve plate and the conversion valve plate are both connected to the telescopic end of the first electric telescopic rod.

[0009] As a further solution of the present invention: the conversion valve plate includes an adjusting plate body, the adjusting plate body slides and penetrates from the bottom of the second air inlet box, an air guide hole is opened on the side of the adjusting plate body facing the air pump, an air duct is arranged inside the adjusting plate body, the top of the air duct is connected with the air guide hole, and the bottom is connected with the pneumatic blocking mechanism, and the adjusting plate body is fixedly connected to the telescopic end of the first electric telescopic rod.

[0010] As a further solution of the present invention: each group of the pneumatic sealing mechanism includes a connecting box, a piston slide and a partition plate, the connecting box is fixedly connected to the outer wall of the detection machine body, the piston slide is slidably connected in the connecting box, the bottom of the connecting box is provided with an air inlet hole connected to the flow direction switching valve, the partition plate is fixedly connected to the piston slide, the first air inlet box and the first air outlet box are both connected to the corresponding partition plate, and an inflation pipeline is arranged on the partition plate.

[0011] As a further solution of the present invention: the inflation pipeline includes an air cavity and a second one-way air valve, the air cavity is opened inside the partition plate, and an opening connected to the interior of the connecting box is provided at the bottom of the air cavity, the second one-way air valve is provided on the side of the partition plate close to the detection machine body, the second one-way air valve is connected to the air cavity, and the side of the partition plate close to the detection machine body is in contact with the inner wall of the connecting box.

[0012] As a further solution of the present invention: a second electric telescopic rod is installed on the outside of the detection machine body, and lifting tubes connected to the flow direction switching valve are provided on both sides of the detection machine body, and the lifting tubes are matched with corresponding air inlet holes. The lifting tubes on both sides are fixedly connected to the telescopic end of the second electric telescopic rod, and the second electric telescopic rod is electrically connected to the auxiliary flow sensor.

[0013] As a further solution of the present invention: a blockage alarm mechanism is arranged on the main body of the detection machine, and the blockage alarm mechanism includes an alarm and a sensor switch group. The sensor switch group is cooperatively arranged on one of the lifting tubes, and the sensor switch group is electrically connected to the alarm, and the sensor switch group can slide laterally relative to the lifting tube.

[0014] As a further solution of the present invention: the sensing switch group includes an air pressure sensing switch, which is arranged above the corresponding lifting tube, and the air pressure sensing switch is electrically connected to the alarm, a strip slide groove is opened on the outer wall of the detection machine body, the air pressure sensing switch is slidably connected to the strip slide groove, and a linkage rod is movably connected between the air pressure sensing switch and the corresponding lifting tube through a hinge.

[0015] A ventilator gas circuit detection system, comprising a ventilator gas circuit detection device in any of the above schemes, and further comprising: A main data acquisition module and a calculation computer, wherein the main data acquisition module is used to collect data detected by the detection machine body when the ventilator is running; the calculation computer is used to compare the data collected by the main data acquisition module with the standard data; A secondary data acquisition module and an intermittent trigger module, wherein the secondary data acquisition module is used to collect the air pressure value detected when the detection machine body performs air tightness self-test, and the intermittent trigger module controls the secondary data acquisition module to collect the air pressure data detected by the detection machine body once at a set interval; The difference calculation module is used to calculate the difference between the data collected twice by the auxiliary data collection module before and after the set time interval.

[0016] Beneficial effects of the present invention: 1. Before the present invention detects the ventilator through the detection machine body, the pipeline of the detection machine body itself can be detected by the air pump, and a high-pressure airflow is generated by accumulating the pressure of the gas collecting tank. When the pressure of the gas collecting tank reaches a set value, the provided blocking valve plate is opened to facilitate the release of the high-pressure airflow into the detection pipeline of the detection machine body to detect whether there is a blockage, and the pipeline can also be cleaned. At the same time, the provided adjustment plate isolates the passage between the air pump and the air inlet side of the gas collecting tank, and the air flow generated by the air pump is diverted to flow to the pneumatic blocking mechanism by relying on the air guide hole and the airway, and the pneumatic blocking mechanism is operated by relying on the air pressure to block the air inlet and outlet ends of the detection machine body, and air is injected for air tightness detection, so as to facilitate the continuous completion of the detection machine body blockage and air tightness self-checking and other functions, improve the convenience of operation and the accuracy of the ventilator detection results, thereby ensuring stable detection.

[0017] 2. After the gas collecting tank of the present invention releases the high-pressure airflow into the pipeline of the detection machine body, if there is a blockage, the auxiliary flow sensor arranged at the air outlet end of the detection machine body cannot detect the gas flow, thereby failing to start the corresponding second electric telescopic rod to drive the corresponding lifting tube to rise and dock into the connecting box. At this time, the airflow generated by the air pump through the lifting tube can act on the air pressure sensing switch for a long time, making it convenient for the air pressure sensing switch to trigger the alarm to continuously sound the alarm. If there is no blockage, the air pressure acts on the air pressure sensing switch for a short time, and the alarm is only sounded for a short time. If no alarm is sounded, it means that the pipeline between the air pump and the lifting tube is not effectively connected, which makes it convenient for the operator to judge what kind of problem exists in the detection machine body according to different situations, thereby realizing multi-functional detection.

[0018] 3. When the lifting tube of the present invention is inserted into the bottom of the connecting box, gas is continuously filled into the connecting box. As the air pressure in the connecting box and the partition plate continues to rise, the partition plate rises by sliding on the piston slide and is inserted into the corresponding first air inlet box and the first air outlet box, thereby facilitating the sealing of the air ports on both sides of the detection machine body. At the same time, a second one-way air valve is also provided on the partition plate to facilitate the gas entering the partition plate to be filled into the detection machine body, thereby facilitating direct inflation to detect air tightness after sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the gas collecting tank and the detection pipeline in the present invention; Figure 3 It is a schematic diagram of the structure of the blocking valve plate, the regulating plate body and the gas collecting tank in the present invention; Figure 4It is a schematic diagram of the position state of the regulating plate when the gas collecting tank is taking in air in the present invention; Figure 5 It is a schematic diagram of the state when the adjusting plate body in the present invention blocks the second air inlet box of the air collecting tank; Figure 6 It is a structural schematic diagram of the blocking valve plate and the second gas outlet box in the present invention in cooperation with each other; Figure 7 It is a structural schematic diagram of the connection box and the detection machine body in the present invention; Figure 8 yes Figure 7 A schematic diagram of the enlarged structure at A in the middle; Fig. 9 It is a schematic diagram of the state when the lifting and lowering plug is connected to the bottom of the connection box in the present invention; Fig.10 It is a schematic cross-sectional structure diagram of the partition plate and the first air inlet box in the present invention in cooperation with each other; Fig.11 yes Fig.10 A schematic diagram of the enlarged structure at B in the middle; Fig.12 It is a schematic cross-sectional structure diagram of the partition plate and the connection box in the present invention; Fig.13 It is a schematic diagram of the state in which the partition plate blocks the first air inlet box and injects air into the main body of the detection machine.

[0021] In the figure: 1. detection machine body; 2. ventilator; 3. measuring computer; 4. first air inlet box; 5. first air outlet box; 6. detection pipeline; 7. control valve; 8. first one-way air valve; 9. air collecting tank; 10. auxiliary air pressure sensor; 11. air pump; 12. second air outlet box; 13. sealing valve plate; 14. first electric telescopic rod; 15. adjusting plate; 16. air guide hole; 17. second air inlet box; 18. second electric telescopic rod; 19. airway; 20. connecting box; 21. air inlet hole; 22. air pressure sensing switch; 23. lifting tube; 24. linkage rod; 25. strip slide; 26. alarm; 27. rubber sealing ring; 28. auxiliary flow sensor; 29. ​​partition plate; 30. air cavity; 31. second one-way air valve; 32. piston slide plate; 33. limit spring; 34. third one-way air valve. DETAILED DESCRIPTION

[0022] The technical scheme of the present invention will be clearly and completely described below in conjunction with the embodiments, and the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 13As shown, a ventilator gas circuit detection device includes a detection machine body 1, a first air inlet box 4 is arranged on one side of the detection machine body 1, and a first air outlet box 5 is arranged on the other side, the first air inlet box 4 and the first air outlet box 5 are both connected with a detection pipeline 6, and the first air inlet box 4 is connected to the air port end of the ventilator 2 through the corresponding detection pipeline 6. When the ventilator 2 is started, a main air pressure sensor, a main flow sensor, a temperature sensor and a humidity sensor are arranged in the detection machine body 1, which are used to detect the air pressure, flow, temperature and humidity of the airflow generated by the ventilator 2; The detection device also includes a self-test inflation mechanism and a pneumatic blocking mechanism. The self-test inflation mechanism includes an air pump 11 and a boosting mechanism. The output end of the air pump 11 is connected to the detection pipeline 6 connected to the ventilator 2 through the boosting mechanism, and is close to the air port end of the ventilator 2. The air pump 11 increases the air pressure of the output air flow through the boosting mechanism, and after the accumulated air pressure reaches a certain level, it is instantly released into the detection pipeline 6 connected to the ventilator 2. In this way, the high-pressure airflow can rush to the side where the first air outlet box 5 is located through the detection pipeline 6 connected to the first air inlet box 4, which is convenient for cleaning the pipeline of the detection machine body 1 and avoiding the presence of impurities in the pipeline affecting the subsequent detection results; a secondary flow sensor 28 is installed in the first air outlet box 5. When the high-pressure airflow is released to pass through the detection machine body 1, the data collected by the secondary flow sensor 28 can also be used to determine whether the pipeline of the detection machine body 1 is blocked. If it is blocked, the secondary flow sensor 28 cannot collect the corresponding value. If there is no blockage, the secondary flow sensor 28 can collect the set flow value, thereby facilitating feedback. There are two groups of pneumatic sealing mechanisms, which are respectively arranged at the positions of the first air inlet box 4 and the first air outlet box 5. A flow direction switching valve is provided at the output end of the air pump 11, and the output end of the air pump 11 is also connected to the pneumatic sealing mechanism through the flow direction switching valve. The flow direction switching valve is used to switch the output end of the air pump 11 to be connected with the pneumatic sealing mechanism. The two groups of pneumatic sealing mechanisms are respectively used to seal the first air inlet box 4 and the first air outlet box 5, which facilitates the air tightness detection of the internal air path of the detection machine body 1.

[0024] In some specific embodiments, the boosting mechanism includes an air collecting tank 9, a second air inlet box 17 is provided on one side of the air collecting tank 9, and a second air outlet box 12 is provided on the other side. The second air inlet box 17 is connected to the output end of the air pump 11 through a pipe, and the second air outlet box 12 is connected to the detection pipeline 6 through a pipe, and the connection position is close to the air port end of the ventilator 2. A first one-way air valve 8 is also provided between the second air outlet box 12 and the corresponding detection pipeline 6, so that the airflow can only flow to the detection pipeline 6 through the second air outlet box 12 and cannot flow back. A sealing valve plate 13 is slidably connected in the second air outlet box 12, and the top of the sealing valve plate 13 passes through the top of the second air outlet box 12, and the flow direction switching valve is provided in the second air inlet box 17.

[0025] It should be noted that a control valve 7 is installed at one end of the detection pipeline 6 connected to the first air inlet box 4 close to the ventilator 2. Before starting to detect the ventilator 2, the control valve 7 is first closed, and then the air pump 11 is started. The air pump 11 transports air through the second air inlet box 17 into the air collecting tank 9, and continuously accumulates and increases the pressure in the air collecting tank 9. When the pressure reaches a certain pressure value, the sealing valve plate 13 is opened to open the second air outlet box 12, thereby releasing the high-pressure airflow into the detection pipeline 6.

[0026] In some specific embodiments, in combination Figures 3 to 6 As shown, the flow direction switching valve includes a first electric telescopic rod 14 and a conversion valve plate. The first electric telescopic rod 14 is fixedly arranged on the outside of the air collecting tank 9. A secondary air pressure sensor 10 electrically connected to the first electric telescopic rod 14 is installed in the air collecting tank 9. The conversion valve plate is arranged at the second air inlet box 17, and the conversion valve plate is cooperatively connected with the pneumatic blocking mechanism. The blocking valve plate 13 and the conversion valve plate are both connected to the telescopic end of the first electric telescopic rod 14.

[0027] Among them, the conversion valve plate includes an adjusting plate body 15, which slides into the second air inlet box 17 from the bottom, and the size of the adjusting plate body 15 matches the internal size of the second air inlet box 17. When the adjusting plate body 15 is completely slid into the second air inlet box 17, it can be blocked. An air guide hole 16 is opened on the side of the adjusting plate body 15 facing the air pump 11, and an air duct 19 is arranged inside the adjusting plate body 15, and the top of the air duct 19 is connected with the air guide hole 16, and the bottom is connected with the pneumatic blocking mechanism through a pipeline, and the adjusting plate body 15 is fixedly connected to the telescopic end of the first electric telescopic rod 14 through the rod body.

[0028] When the air pump 11 continuously fills gas into the gas collecting tank 9, and the air pressure continues to accumulate and rise to reach the set value, the auxiliary air pressure sensor 10 feeds back a signal, relies on the matching controller to receive the signal, and issues a command to extend the first electric telescopic rod 14, and the first electric telescopic rod 14 simultaneously drives the blocking valve plate 13 and the adjusting plate body 15 to rise, and the blocking valve plate 13 opens the second air outlet box 12, so that the high-pressure gas in the gas collecting tank 9 can rush into the detection pipeline 6, and the adjusting plate body 15 is completely inserted into the second air inlet box 17 during the rising process, and the second air inlet box 17 is blocked, and after rising, the air guide hole 16 on the adjusting plate body 15 faces the output end of the air pump 11, so as to facilitate the airflow generated by the air pump 11 to enter the airway 19 through the air guide hole 16, and then enter the pneumatic blocking mechanism along the pipeline.

[0029] In some specific embodiments, in combination Fig.10 and Fig.11As shown, each group of pneumatic blocking mechanisms includes a connection box 20, a piston slide 32 and a partition plate 29. The connection box 20 is fixedly connected to the outer wall of the detection machine body 1, and the two connection boxes 20 are respectively located below the first air inlet box 4 and the first air outlet box 5. The piston slide 32 is slidably connected in the connection box 20. The piston slide 32 and the connection box 20 are combined into a piston mechanism. The top of the connection box 20 is open, and a compressible limit spring 33 is arranged between the piston slide 32 and the top of the connection box 20. Specifically, a convex block can be installed at the top edge of the connection box 20, and then Afterwards, the limit spring 33 is arranged between the protrusion and the piston slide plate 32, and an air inlet hole 21 is opened at the bottom of the connecting box 20 to cooperate with the flow direction switching valve. The partition plate 29 is fixedly connected to the piston slide plate 32, and the first air inlet box 4 and the first air outlet box 5 are both connected with the corresponding partition plate 29. Specifically, the top of the partition plate 29 is inserted into the corresponding first air inlet box 4 and the first air outlet box 5, and the sizes are matched, that is, after the two partition plates 29 are slid and raised, the corresponding first air inlet box 4 and the first air outlet box 5 can be completely blocked, and an inflation pipeline is set on the partition plate 29.

[0030] Among them, the inflation circuit includes an air cavity 30 and a second one-way air valve 31. The air cavity 30 is opened inside the partition plate 29, and an opening connected to the inside of the connecting box 20 is arranged at the bottom of the air cavity 30. The second one-way air valve 31 is arranged on the side of the partition plate 29 close to the detection machine body 1, and the second one-way air valve 31 is close to the bottom of the partition plate 29. The second one-way air valve 31 is connected to the air cavity 30. The second one-way air valve 31 can only allow the air in the air cavity 30 to flow out and cannot flow back. The unit time air intake flow rate of the air cavity 30 is much larger than the unit time exhaust flow rate of the second one-way air valve 31, which can ensure rapid pressure increase in the air cavity 30. The side of the partition plate 29 close to the detection machine body 1 is in contact with the inner wall of the connecting box 20.

[0031] When the air pump 11 introduces gas into the connecting box 20 through the flow switching valve, the gas enters the air cavity 30 in the partition plate 29. At this time, since one side of the partition plate 29 equipped with the second one-way air valve 31 is in contact with the inner wall of the connecting box 20, it is closed to avoid air leakage, which facilitates the continuous accumulation of gas in the air cavity 30. Then the rising air pressure will push the partition plate 29 and the piston slide plate 32 upward, so that the piston slide plate 32 can compress the limit spring 33 and make the partition plate 29 slide and insert into the corresponding first air inlet box 4 and the first air outlet box 5. Finally, the first air inlet box 4 and the first air outlet box 5 are respectively blocked by the corresponding partition plates 29. Fig.13As shown, when the partition plate 29 is fully inserted, the second one-way air valve 31 is exposed to the corresponding first air inlet box 4 and the first air outlet box 5, and the second one-way air valve 31 is facing the internal pipeline of the detection machine body 1, so that the airflow continuously filled by the air pump 11 can enter the interior of the detection machine body 1 blocked on both sides through the second one-way air valve 31, and continuously accumulate and rise to reach the set air pressure, and then stop the air pump 11 to inflate, and then observe whether there is any leakage, so as to facilitate the judgment of whether the air tightness of the detection machine body 1 itself is normal.

[0032] It should be noted that since the air intake flow rate per unit time of the air cavity 30 is much larger than the air exhaust flow rate per unit time of the second one-way air valve 31, even if the second one-way air valve 31 leaks for a short time when entering the first air intake box 4 and the first air outlet box 5 along with the partition plate 29, the interior of the air cavity 30 can still maintain a boosted state, thereby ensuring that the partition plate 29 is fully inserted into the first air intake box 4 and the first air outlet box 5.

[0033] It should also be noted that a third one-way air valve 34 is installed in the lifting tube 23. The third one-way air valve 34 allows the air flow to flow out only through the lifting tube 23 and cannot flow back, and the main air pressure sensor is electrically connected to the air pump 11. When the first air inlet box 4 and the first air outlet box 5 of the detection machine body 1 are blocked and perform an airtightness self-test, when the main air pressure sensor detects that the internal air pressure has risen to a set value, it will feedback a signal and control the air pump 11 to stop through the matching controller, and then detect whether the air pressure has dropped.

[0034] In some specific implementation schemes, in order to facilitate the completion of the blockage detection after the gas collecting tank 9 releases the high-pressure airflow into the detection pipeline 6 of the detection machine body 1, and automatically determine whether to perform subsequent air tightness detection based on the blockage result, combined with Figures 7 to 9 As shown, a second electric telescopic rod 18 is installed on the outside of the detection machine body 1, and lifting pipes 23 connected to the flow direction switching valve through a hose are arranged on both sides of the detection machine body 1. When the flow direction switching valve includes components such as the adjustment plate body 15, the lifting pipes 23 on both sides can be connected to the airway 19 on the adjustment plate body 15 through a Y-shaped hose, the lifting pipes 23 are matched with the corresponding air inlet holes 21, and a sealing ring is also installed on the lifting pipes 23. The lifting pipes 23 on both sides are fixedly connected to the telescopic end of the second electric telescopic rod 18, and the second electric telescopic rod 18 is electrically connected to the auxiliary flow sensor 28.

[0035] When the gas collecting tank 9 releases the high-pressure airflow into the detection pipeline 6 connected to the detection machine body 1, if the detection machine body 1 is not blocked, the high-pressure airflow can flow from the side of the first air inlet box 4 of the detection machine body 1 to the side where the first air outlet box 5 is located, and in this process, the auxiliary flow sensor 28 can detect that the gas flow reaches the set value, thereby generating feedback, relying on the matching controller to receive the signal and generate feedback to control the second electric telescopic rod 18 to extend, and the second electric telescopic rod 18 drives the lifting and lowering plugs 23 on both sides to rise and insert into the corresponding air inlet hole 21 at the bottom of the connection box 20, and the lifting and lowering The insert tube 23 relies on the rubber sealing ring 27 to ensure the sealing of the docking position. At this time, since the output end of the air pump 11 is connected to the lifting insert tube 23 through the air channel 19 on the adjusting plate body 15, it is convenient to transport gas to the connection boxes 20 on both sides, so that the corresponding partition plate 29 is raised under the action of air pressure to complete the sealing action, and then the air tightness test is performed; if there is a blockage inside the detection machine body 1, the auxiliary flow sensor 28 will not be able to detect the corresponding gas flow, and thus the second electric telescopic rod 18 cannot be feedback controlled to operate, so that the subsequent air tightness test cannot be continued.

[0036] In some specific implementation schemes, in order to facilitate feedback when blockage is detected in the detection machine body 1, a blockage alarm mechanism is provided on the detection machine body 1. The blockage alarm mechanism includes an alarm 26 and a sensing switch group. The sensing switch group is cooperatively arranged on one of the lifting tubes 23, and the sensing switch group is electrically connected to the alarm 26. The sensing switch group can slide laterally relative to the lifting tube 23.

[0037] The induction switch group includes an air pressure induction switch 22, which is arranged above the corresponding lifting plug 23, and the air pressure induction switch 22 is electrically connected to the alarm 26. A strip slide 25 is provided on the outer wall of the detection machine body 1, and the air pressure induction switch 22 is slidably connected to the strip slide 25 through a slider. A linkage rod 24 is movably connected between the outer shell edge of the air pressure induction switch 22 and the corresponding lifting plug 23 through a hinge. The linkage rod 24 is in an inclined state. When the airflow generated by the air pump 11 is ejected upward through the lifting plug 23, it can act on the air pump 11. The pressure sensing switch 22 is on the second electric telescopic rod 18. If there is a blockage at this time, the second electric telescopic rod 18 will not move, and the lifting plug 23 will continue to generate airflow impact to the air pressure sensing switch 22, and the air pressure sensing switch 22 will cause the alarm 26 to sound an alarm; if there is no blockage, when the second electric telescopic rod 18 drives the lifting plug 23 to rise, the corresponding lifting plug 23 will push the air pressure sensing switch 22 to slide horizontally along the strip slide 25 through the linkage rod 24 during the lifting process, and finally the lifting plug 23 will be inserted into the bottom of the connection box 20 for subsequent air tightness detection; The operator can determine whether there is a blockage based on whether the alarm 26 continues to sound an alarm. If the alarm 26 continues to sound an alarm, it means that there is a blockage in the detection machine body 1; if there is a short-term alarm and then stops, it means that the air pump 11 is normally connected to the lifting tube 23 and is normally delivering airflow; if no alarm is issued, it means that the air pump 11 and the lifting tube 23 are not successfully connected; different results can be judged according to different situations.

[0038] A ventilator air circuit detection system includes a ventilator air circuit detection device in any of the above-mentioned implementation schemes, and also includes a main data acquisition module, a measurement computer 3, a secondary data acquisition module, an intermittent trigger module and a difference calculation module. The main data acquisition module is used to collect data detected by the detection machine body 1 when the ventilator 2 is running, mainly collecting data detected by the main air pressure sensor, the main flow sensor, the temperature sensor and the humidity sensor set in the detection machine body 1; the measurement computer 3 is used to compare the data collected by the main data acquisition module with the standard data, and judge whether it is qualified. Here, the standard data is manually set in advance in the measurement computer 3 according to the relevant data generated when the qualified ventilator 2 is running, for retrieval and comparison; the secondary data acquisition module is used to collect the air pressure value detected when the detection machine body 1 performs an airtightness self-test, and the intermittent trigger module controls the secondary data acquisition module to collect the air pressure data detected by the detection machine body 1 once at a set interval; the difference calculation module is used to perform difference calculation on the data collected twice by the secondary data acquisition module before and after the set interval, and based on the difference, it can be judged whether there is a problem with the airtightness of the detection machine body 1 itself.

[0039] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios: Before testing the ventilator 2, in order to ensure the accuracy of the test results, the test machine body 1 is first self-tested. During the self-test, the first air inlet box 4 and the first air outlet box 5 of the test machine body 1 are first installed with the test pipeline 6, and the test pipeline 6 connected to the first air inlet box 4 is connected to the air port end of the ventilator 2, and the control valve 7 set at the end of the test pipeline 6 close to the ventilator 2 is closed, and then the air pump 11 is started to continuously fill the gas collecting tank 9 with gas, and when the air pressure continues to accumulate and rise to the set value, the auxiliary air pressure sensor 10 feedbacks a signal, relies on the matching controller to receive the signal, and issues a command to make the first When an electric telescopic rod 14 is extended, the first electric telescopic rod 14 drives the blocking valve plate 13 and the adjusting plate body 15 to rise at the same time, and the blocking valve plate 13 opens the second air outlet box 12, so that the high-pressure gas in the gas collecting tank 9 can be rushed into the detection pipeline 6. During the rising process, the adjusting plate body 15 is completely inserted into the second air inlet box 17 to block the second air inlet box 17. After the adjustment plate body 15 is raised, the air guide hole 16 on the adjusting plate body 15 faces the output end of the air pump 11, so that the airflow generated by the air pump 11 can enter the airway 19 through the air guide hole 16, and then enter the lifting and lowering plugs 23 distributed on both sides of the detection machine body 1 along the pipeline; When the gas collecting tank 9 releases the high-pressure airflow into the detection pipeline 6 connected to the detection machine body 1, if there is no obstruction in the detection machine body 1, the high-pressure airflow can flow from one side of the first air inlet box 4 of the detection machine body 1 to the side where the first air outlet box 5 is located, and in this process, the auxiliary flow sensor 28 can detect that the gas flow reaches the set value, thereby generating feedback, and relying on the matching controller to receive the signal and generate feedback to control the second electric telescopic rod 18 to extend, the second electric telescopic rod 18 drives the lifting and lowering tubes 23 on both sides to rise and insert into the corresponding air inlet holes 21 at the bottom of the connection box 20, and the lifting and lowering tubes 23 rely on the rubber sealing ring 27 to ensure the sealing of the docking position. At this time, since the output end of the air pump 11 is connected to the lifting and lowering tubes 23 by the airway 19 on the adjustment plate 15, it is convenient to transport gas to the connection boxes 20 on both sides; The gas transported into the connecting box 20 can enter the air cavity 30 in the partition plate 29. At this time, since one side of the partition plate 29 equipped with the second one-way air valve 31 is in contact with the inner wall of the connecting box 20, it is closed to avoid air leakage, and facilitates the continuous accumulation of gas in the air cavity 30. Then the rising air pressure will push the partition plate 29 and the piston slide plate 32 upward, so that the piston slide plate 32 can compress the limit spring 33 and make the partition plate 29 slide and insert into the corresponding first air inlet box 4 and the first air outlet box 5. Finally, the first air inlet box 4 and the first air outlet box 5 are closed. 5 are respectively blocked by the corresponding partition plates 29. When the partition plates 29 are fully inserted, the second one-way air valves 31 are exposed to the corresponding first air inlet box 4 and the first air outlet box 5, and the second one-way air valves 31 are all facing the internal pipeline of the detection machine body 1. In this way, the airflow continuously charged by the air pump 11 can enter the interior of the detection machine body 1 blocked on both sides through the second one-way air valve 31, and continuously accumulate and rise to reach the set air pressure, and then stop the air pump 11 to inflate, and then observe whether there is leakage, so as to facilitate the judgment of whether the air tightness of the detection machine body 1 itself is normal.

[0040] If there is a blockage inside the detection machine body 1, the auxiliary flow sensor 28 cannot detect the corresponding gas flow, and thus cannot feedback control the operation of the second electric telescopic rod 18, so that the subsequent air tightness detection cannot be continued; At this time, since the second electric telescopic rod 18 does not move, the lifting plug 23 is not lifted and connected to the bottom of the connection box 20, and the air pressure sensing switch 22 is above the corresponding lifting plug 23, the lifting plug 23 continues to generate airflow impact to the air pressure sensing switch 22, and the air pressure sensing switch 22 causes the alarm 26 to sound an alarm; if there is no obstruction, when the second electric telescopic rod 18 drives the lifting plug 23 to rise, the corresponding lifting plug 23 pushes the air pressure sensing switch 22 to slide horizontally along the strip slide 25 through the linkage rod 24 during the lifting process, and finally the lifting plug 23 is inserted into the bottom of the connection box 20 for subsequent air tightness detection; The operator can determine whether there is a blockage based on whether the alarm 26 continues to sound an alarm. If the alarm 26 continues to sound an alarm, it means that there is a blockage in the detection machine body 1; if there is a short-term alarm and then stops, it means that the air pump 11 is normally connected to the lifting tube 23 and is normally delivering airflow; if no alarm is issued, it means that the air pump 11 and the lifting tube 23 are not successfully connected; different results can be judged according to different situations.

[0041] Several embodiments of the present invention are described in detail above, but the embodiments of the present invention are not limited thereto and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A ventilator gas circuit detection device, comprising a detection machine body (1), wherein the detection machine body (1) is provided with a first air inlet box (4) and a first air outlet box (5), wherein the first air inlet box (4) and the first air outlet box (5) are both connected to a detection pipeline (6), and the first air inlet box (4) is connected to the air outlet end of the ventilator (2) via the corresponding detection pipeline (6), characterized in that: Also includes: A self-checking inflation mechanism, the self-checking inflation mechanism comprising an air pump (11) and a boosting mechanism, the output end of the air pump (11) being connected to a detection pipeline (6) connected to the ventilator (2) via the boosting mechanism, and a secondary flow sensor (28) being installed in the first air outlet box (5); A pneumatic blocking mechanism, wherein the pneumatic blocking mechanism is provided in two groups and is used to block the first air inlet box (4) and the first air outlet box (5) respectively; a flow direction switching valve is provided at the output end of the air pump (11), and the output end of the air pump (11) is also connected to the pneumatic blocking mechanism via the flow direction switching valve.

2. A ventilator gas circuit detection device according to claim 1, characterized in that: The boost mechanism comprises an air collecting tank (9), a second air inlet box (17) is arranged on one side of the air collecting tank (9), and a second air outlet box (12) is arranged on the other side, the second air inlet box (17) is connected to the output end of the air pump (11), the second air outlet box (12) is connected to the detection pipeline (6), a blocking valve plate (13) is slidably connected inside the second air outlet box (12), and the flow direction switching valve is arranged in the second air inlet box (17).

3. A ventilator airway detection device according to claim 2, characterized in that: The flow direction switching valve comprises a first electric telescopic rod (14) and a conversion valve plate, wherein the first electric telescopic rod (14) is fixedly arranged outside an air collecting tank (9), a secondary air pressure sensor (10) electrically connected to the first electric telescopic rod (14) is installed in the air collecting tank (9), the conversion valve plate is arranged at the second air inlet box (17), and the conversion valve plate is cooperatively connected to a pneumatic blocking mechanism, and the blocking valve plate (13) and the conversion valve plate are both connected to the telescopic end of the first electric telescopic rod (14).

4. A ventilator airway detection device according to claim 3, characterized in that: The conversion valve plate comprises an adjusting plate body (15), the adjusting plate body (15) slidingly penetrates from the bottom of the second air inlet box (17), an air guide hole (16) is provided on a side of the adjusting plate body (15) facing the air pump (11), an air channel (19) communicating with the air guide hole (16) is provided inside the adjusting plate body (15), and the bottom of the air channel (19) is communicated with a pneumatic blocking mechanism, and the adjusting plate body (15) is fixedly connected to the telescopic end of the first electric telescopic rod (14).

5. A ventilator airway detection device according to claim 1, characterized in that: Each group of the pneumatic blocking mechanisms comprises a connection box (20), a piston slide (32) and a partition plate (29); the connection box (20) is fixedly connected to the outer wall of the detection machine body (1); the piston slide (32) is slidably connected in the connection box (20); an air inlet hole (21) connected to a flow direction switching valve is provided at the bottom of the connection box (20); the partition plate (29) is fixedly connected to the piston slide (32); the first air inlet box (4) and the first air outlet box (5) are both connected to the corresponding partition plate (29); and an air charging pipeline is provided on the partition plate (29).

6. A ventilator airway detection device according to claim 5, characterized in that: The inflation pipeline comprises an air cavity (30) and a second one-way air valve (31); the air cavity (30) is provided inside the partition plate (29); and an opening communicating with the inside of the connection box (20) is provided at the bottom of the air cavity (30); the second one-way air valve (31) is provided on a side of the partition plate (29) close to the detection machine body (1); the second one-way air valve (31) is communicated with the air cavity (30); and a side of the partition plate (29) close to the detection machine body (1) is in contact with the inner wall of the connection box (20).

7. A ventilator airway detection device according to claim 5, characterized in that: A second electric telescopic rod (18) is installed on the outside of the detection machine body (1), and lifting pipes (23) connected to the flow direction switching valve are arranged on both sides of the detection machine body (1), and the lifting pipes (23) are matched with corresponding air inlet holes (21). The lifting pipes (23) on both sides are fixedly connected to the telescopic ends of the second electric telescopic rod (18), and the second electric telescopic rod (18) is electrically connected to the auxiliary flow sensor (28).

8. A ventilator airway detection device according to claim 7, characterized in that: The detection machine body (1) is provided with a blockage alarm mechanism, the blockage alarm mechanism comprising an alarm (26) and a sensing switch group, the sensing switch group being cooperatively arranged on one of the lifting tubes (23), and the sensing switch group being electrically connected to the alarm (26), and the sensing switch group being capable of sliding laterally relative to the lifting tube (23).

9. A ventilator airway detection device according to claim 8, characterized in that: The induction switch group comprises an air pressure induction switch (22), the air pressure induction switch (22) is arranged above the corresponding lifting plug (23), and the air pressure induction switch (22) is electrically connected to the alarm (26), a strip-shaped slide groove (25) is provided on the outer wall of the detection machine body (1), the air pressure induction switch (22) is slidably connected to the strip-shaped slide groove (25), and a linkage rod (24) is movably connected between the air pressure induction switch (22) and the corresponding lifting plug (23) via a hinge.

10. A ventilator gas circuit detection system, comprising a ventilator gas circuit detection device according to any one of claims 1 to 9, characterized in that: Also includes: A main data acquisition module and a measuring computer (3), wherein the main data acquisition module is used to collect data detected by the detection machine body (1) when the ventilator (2) is running; and the measuring computer (3) is used to compare the data collected by the main data acquisition module with standard data; A secondary data acquisition module and an intermittent trigger module, wherein the secondary data acquisition module is used to acquire the air pressure value detected when the detection machine body (1) performs an airtightness self-test, and the intermittent trigger module controls the secondary data acquisition module to acquire the air pressure data detected by the detection machine body (1) once at a set interval; The difference calculation module is used to calculate the difference between the data collected twice by the auxiliary data collection module before and after the set time interval.

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