Dredging method and dredging device for nutrient canal

Abstract

The invention relates to the technical field of medical instruments, in particular to a dredging method and a dredging device for a nutrient canal, and the dredging method for the nutrient canal comprises the following steps: measuring the pressure of an air inlet channel, drawing an air pressure value change curve, and judging whether a feeding channel has a blocking trend risk according to the air pressure value change condition of the air pressure value change curve. According to the dredging device for the pipe, whether the feeding channel is abnormal or not is judged by conducting positive and negative pressure operation on the air inlet cavity channel for multiple times and conducting pressure measurement again, finally air in the air inlet cavity channel is exhausted, and water is injected into the feeding channel to dredge the feeding channel. Comprising an air inlet cavity channel, a graph line drawing unit, an air blowing unit, an extraction unit, a three-way valve, an implementation control unit and a water injection unit, so that the situation that data for timely analyzing the circulation condition of the nutrient canal lacks data representativeness is improved, a corresponding prevention mechanism is optimized, and the problem of blockage of a feeding channel of the nutrient canal is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a method for unclogging a nutrition tube and a device thereof. Background Art

[0002] In the medical field, the use of feeding tubes is crucial for patients who cannot eat normally orally. Feeding tubes can provide patients with necessary nutritional support and maintain their vital signs and body functions. However, during the use of feeding tubes, they often face the problem of blockage.

[0003] Existing unclogging methods usually only deal with the nutrition tube after it has been blocked, and there is a lack of early warning and prevention mechanisms for blockage, which may lead to interruption of the patient's nutritional support after the nutrition tube is blocked, affecting the patient's treatment effect and recovery process. With the continuous development of medical technology, the requirements for nutrition tube unclogging methods are becoming higher and higher. A more efficient, safe and intelligent nutrition tube unclogging method is needed, which can monitor the operating status of the nutrition tube in real time, predict the blockage trend in advance, and take corresponding measures to prevent and unblock the blockage before it occurs, so as to ensure that the patient's nutritional support can be carried out continuously and stably.

[0004] For example, Chinese patent publication number: CN118384034A, the invention discloses an enteral nutrition supply device for ICU patients and a method for clearing a nutrition tube, including a nutrition tube, wherein both ends of the nutrition tube are respectively provided with a feeding hole and a connecting tube, a sealing plug is provided at the opening of the connecting tube, a limiting tube is provided at the upper end of the nutrition tube, and transmission components and clearing components are provided on both sides of the limiting tube. A rubber plug is provided at the bottom of the nutrition tube, and the rubber plug is arranged below the feeding hole. Both ends of the rubber plug are connected with pull ropes, which pass through the two ends of the nutrition tube respectively and are tightly connected to the transmission component. The transmission component is used to move the rubber plug up and down, and a limiting device for fixing the transmission component is provided on the limiting tube. The clearing component includes an inflation tube and an air pump, one end of the inflation tube is fixed to the upper end of the rubber plug, and the other end extends out of the nutrition tube and is provided with an air plug. The inflation tube in the nutrition tube is also fixedly sleeved with several clearing rods.

[0005] The prior art still has the following problems:

[0006] The existing technology cannot dynamically obtain the risk of blockage of the feeding tube feeding channel during feeding. The data for timely analysis of the feeding tube circulation lacks representativeness and lacks corresponding prevention and optimization mechanisms, which is not conducive to the effective solution of the problem of blockage of the feeding tube feeding channel. Summary of the invention

[0007] To this end, the present invention provides a method and a device for unclogging a feeding tube, so as to overcome the problems that the prior art cannot dynamically obtain the blockage risk of the feeding tube feeding channel during the feeding process, the data for timely analysis of the feeding tube circulation status lacks data representativeness and lacks corresponding prevention and optimization mechanisms.

[0008] To achieve the above object, the present invention provides a method for dredging a nutrient tube, comprising:

[0009] After blowing air into the air inlet cavity inside the nutrition tube, the cavity is sealed, the pressure of the air inlet cavity is measured during a preset process, and a pressure change curve of the internal air pressure of the air inlet cavity over time is drawn;

[0010] Wherein, the preset process is the process of injecting nutrients into the feeding channel inside the nutrition tube;

[0011] Determining whether the feeding passage has a risk of clogging tendency according to the air pressure change of the air pressure change curve;

[0012] Based on the determination result that the feeding passage has a risk of clogging tendency, performing several positive and negative pressure implementation operations on the air intake cavity, wherein the positive and negative pressure implementation operations include blowing air into the air intake cavity and extracting air;

[0013] The air intake cavity that has completed several positive and negative pressure operations is re-sealed and pressure-measured again, and whether the feeding passage is abnormal is determined based on the comparison of the internal air pressure values ​​of the air intake cavity within a preset pressure measurement time;

[0014] Based on the determination result that there is an abnormality in the feeding passage, the air in the air intake cavity is discharged, and water is injected into the feeding passage to dredge the feeding passage.

[0015] Furthermore, the process of screening the characteristic data points of the air pressure value change based on the air pressure value change curve includes:

[0016] Calculating the slopes of a plurality of data points on the air pressure value variation curve;

[0017] The data points whose slope exceeds a preset slope threshold are screened as characteristic data points of air pressure value changes.

[0018] Furthermore, the step of determining the change in air pressure value includes:

[0019] Determine the time node corresponding to each characteristic data point of the air pressure value change on the time coordinate axis;

[0020] Sort the characteristic data points of the pressure value changes in the time dimension according to the order of time nodes;

[0021] Obtaining the internal air pressure values ​​corresponding to the plurality of air pressure value change characteristic data points on the internal air pressure value coordinate axis, and sorting the plurality of air pressure value change characteristic data points in order of the internal air pressure values ​​from small to large in terms of the air pressure value dimension;

[0022] The comparison between the time dimension sorting and the air pressure value dimension sorting is determined as the air pressure value change.

[0023] Furthermore, the process of determining whether the feeding passage has a risk of clogging tendency includes:

[0024] If the time dimension sorting is consistent with the air pressure value dimension sorting, it is determined that the feeding passage has a risk of clogging tendency.

[0025] Furthermore, in the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air inlet cavity once and extracting air once.

[0026] Furthermore, the process of implementing the positive and negative pressure operation also includes:

[0027] The amount of air injected at a single time and the amount of air extracted at a single time are adjusted according to the number of characteristic data points of the air pressure value change, and the amount of air injected at a single time and the amount of air extracted at a single time are respectively positively correlated with the number of characteristic data points of the air pressure value change;

[0028] The amount of air blown in at one time is the same as the amount of air extracted at one time.

[0029] Furthermore, the process of determining the internal air pressure value of the air intake channel within the preset pressure measurement time includes:

[0030] The preset pressure measurement time is evenly divided into a pre-pressure measurement time period and a post-pressure measurement time period;

[0031] Calculate the average value of the internal air pressure value of the air inlet channel corresponding to a plurality of time points within the front period of the pressure measurement, and determine the average value as the front period pressure measurement value;

[0032] The average value of the internal air pressure value of the air inlet channel corresponding to a plurality of time points within the rear period of the pressure measurement is calculated, and the average value is determined as the rear period pressure measurement value.

[0033] Furthermore, the process of determining whether the feeding passage is abnormal includes:

[0034] If the difference between the front section pressure measurement value and the rear section pressure measurement value does not meet the preset requirement, it is determined that there is an abnormality in the feeding passage;

[0035] The preset requirement is that the difference is smaller than a preset difference threshold.

[0036] Furthermore, the present invention also provides a dredging device for a nutrient tube, comprising:

[0037] An air intake channel is arranged inside the nutrition tube and arranged in parallel with the feeding channel in the nutrition tube, and includes a gas inlet and outlet and a gas cavity, so that air can be blown into and extracted from the gas cavity through the gas inlet and outlet;

[0038] The gas inlet and outlet are also used to seal the air inlet cavity;

[0039] A graph drawing unit connected to the air intake cavity for drawing a pressure change curve of the internal air pressure of the air intake cavity over time and determining whether the feeding passage has a risk of clogging tendency;

[0040] A blower unit, used for blowing air into the air inlet cavity, comprising a blower and a pipe connected to the blower;

[0041] An extraction unit, which is used to extract air into the air intake cavity, comprising a negative pressure pump and a pipeline connected to the negative pressure pump;

[0042] A three-way valve, which is respectively connected to the air inlet channel, the air blowing unit and the extraction unit, and is used to control the connection and disconnection between the air blowing unit and the air inlet channel, and the connection and disconnection between the extraction unit and the air inlet channel;

[0043] A control unit is implemented, which is connected to the blowing unit, the extraction unit and the three-way valve respectively, and is used to control the blowing of air into the air intake cavity by the blowing unit, control the extraction unit to extract air from the air intake cavity and the opening and closing of the three-way valve.

[0044] Furthermore, the implementation control unit is also connected to a water injection unit, and the water injection unit is connected to the feeding channel of the nutrition tube for injecting water into the feeding channel.

[0045] Compared with the prior art, the beneficial effect of the present invention lies in that the pipe unblocking method of the present invention comprises measuring the pressure of the air intake cavity, drawing a pressure change curve of the internal air pressure of the air intake cavity over time, judging whether the feeding passage has a risk of blockage tendency according to the pressure change of the air pressure change curve, judging whether the feeding passage is abnormal by performing several positive and negative pressure operations on the air intake cavity and measuring the pressure again, and finally discharging the air in the air intake cavity and injecting water into the feeding passage to unblock the feeding passage. The pipe unblocking device of the present invention comprises an air intake cavity, a graph drawing unit, an air blowing unit, an extraction unit, a three-way valve, an implementation control unit and a water injection unit, thereby improving the representativeness of data for timely analysis of the circulation of the nutrition tube and optimizing the corresponding prevention mechanism, thereby achieving an effective solution to the problem of blockage of the feeding passage of the nutrition tube.

[0046] In particular, the present invention calculates the slope of the data points in the air pressure value change curve, and filters the data points whose slope exceeds the preset slope threshold as the characteristic data points of the air pressure value change. It can keenly capture the abnormal points of the air pressure change, and sort the screened characteristic data points of the air pressure value change in two dimensions of time dimension and air pressure value dimension. It can be understood that the sorting of the characteristic data points of the air pressure value change in the time dimension is consistent with the sorting of the air pressure value dimension, which indicates that the air pressure value of the characteristic data points of the air pressure value change is continuously increasing, and some factors that hinder the flow of nutrients have appeared in the feeding channel, resulting in the continuous increase of the air pressure value inside the air intake cavity caused by the continuous squeezing of the air intake cavity by the feeding channel. The blockage trend risk is determined by comparing the sorting of these two dimensions, which further improves the accuracy of the judgment, realizes the dynamic acquisition of the blockage risk of the feeding channel of the feeding tube during the feeding process, and improves the data representativeness of the timely analysis of the circulation of the feeding tube.

[0047] In particular, the present invention forms a relatively stable alternating positive and negative pressure environment in the air intake cavity by blowing and extracting air through positive and negative pressure operations. For the feeding channel of the nutrition tube, the stable alternating positive and negative pressure helps to push the blockage to move and initially alleviate the blockage. It can be understood that when the number of characteristic data points of the air pressure value change is small, it means that the blockage trend is relatively mild. At this time, the amount of air blown in and extracted at a single time can be reduced accordingly, which can not only achieve a certain dredging effect, but also avoid excessive impact on the feeding channel due to excessive pressure. On the contrary, if the number of characteristic data points of the air pressure value change is large, it means that the blockage may be more complicated or serious. Correspondingly increasing the amount of air blown in and extracted at a single time can exert stronger positive and negative pressure forces on the blockage, thereby increasing the probability of successful dredging, and further, improving the data representativeness of the timely analysis of the circulation situation of the nutrition tube and optimizing the corresponding prevention mechanism, thereby achieving an effective solution to the blockage problem of the feeding channel of the nutrition tube, improving the normal use efficiency of the nutrition tube, and ensuring the smooth progress of nutrition delivery.

[0048] In particular, the present invention divides the preset pressure measurement time equally into a time period before the pressure measurement and a time period after the pressure measurement, and then calculates the average values ​​of the internal air pressure values ​​corresponding to several time points of the air intake cavity in these two time periods, so as to more carefully capture the air pressure characteristics at different stages in the pressure measurement process, and reflect the stage-by-stage changes in air pressure that may occur in the pressure measurement process. It can be understood that when the feeding channel recovers from slight blockage to normal operation, the internal extrusion force on the feeding pipe becomes smaller, so that the degree to which the feeding pipe squeezes the air intake cavity is weakened, that is, there will be a more obvious difference in the pressure measurement values ​​of the front and rear sections. If the difference between the pressure measurement values ​​of the front and rear sections is small, it indicates that the degree to which the feeding pipe squeezes the air intake cavity remains almost unchanged, indicating that the feeding pipe is still abnormally blocked. Furthermore, the representativeness of the data for timely analysis of the circulation of the feeding tube is improved and the corresponding prevention mechanism is optimized, thereby achieving an effective solution to the problem of blockage of the feeding channel of the feeding tube, improving the normal use efficiency of the feeding tube, and ensuring smooth nutrient delivery.

[0049] In particular, the present invention discharges the air in the air intake cavity under the condition that an abnormality is determined in the feeding passage, and then injects water into the feeding passage to clear it. It can be understood that discharging the air in the air intake cavity can reduce the air pressure value inside the air intake cavity, which is beneficial for the feeding pipe to be squeezed into the air intake cavity, and the inner diameter of the feeding passage is enlarged. Then, by injecting water into the feeding passage, the injected water can flush away the blockage by virtue of the flushing force, and the patency of the feeding passage is restored. Furthermore, the problem of blockage in the feeding passage of the nutrition tube is effectively solved, the normal use efficiency of the nutrition tube is improved, and the smooth nutrient delivery is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A step diagram of a method for unclogging a nutrient tube according to an embodiment of the present invention;

[0051] Figure 2 A diagram showing the steps of determining the change of air pressure value according to an embodiment of the present invention;

[0052] Figure 3 A logic flow chart for determining whether a feeding passage is abnormal according to an embodiment of the present invention;

[0053] Figure 4 This is a simplified structural diagram of a nutrient tube and a dredging device for the nutrient tube according to an embodiment of the present invention;

[0054] In the figure: 1. Nutrition tube, 2. Gas cavity, 3. Feeding channel, 4. Gas inlet and outlet, 5. Fan, 6. Negative pressure pump, 7. Three-way valve, 8. Water injection unit. DETAILED DESCRIPTION

[0055] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0057] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0058] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] See also Figure 1 As shown, it is a step diagram of a method for dredging a nutrition tube according to an embodiment of the present invention. The method for dredging a nutrition tube according to the present invention comprises:

[0060] Step S100, air is blown into the air inlet cavity inside the nutrition tube 1 and then the cavity is sealed, the air inlet cavity is pressure-measured during a preset process, and a pressure change curve of the air pressure inside the air inlet cavity over time is plotted;

[0061] The preset process is a process of injecting nutrients into the feeding channel 3 inside the nutrition tube 1;

[0062] Step S200, determining whether the feeding passage 3 has a risk of clogging tendency according to the air pressure change of the air pressure change curve;

[0063] Step S300, based on the determination result that the feeding passage 3 has a risk of clogging tendency, performing several positive and negative pressure implementation operations on the air intake cavity, wherein the positive and negative pressure implementation operations include blowing air into the air intake cavity and extracting air;

[0064] Step S400, re-closing and re-pressure measuring the air intake cavity after completing several positive and negative pressure operations, and determining whether the feeding passage 3 is abnormal based on the comparison of the internal air pressure values ​​of the air intake cavity within a preset pressure measurement time;

[0065] Step S500 , based on the determination result that the feeding passage 3 is abnormal, the air in the air intake cavity is discharged, and water is injected into the feeding passage 3 to clear the feeding passage 3 .

[0066] Specifically, under the condition that it is determined that there is an abnormality in the feeding passage 3, the present invention discharges the air in the air intake cavity, and then injects water into the feeding passage 3 to clear it. It can be understood that discharging the air in the air intake cavity can reduce the air pressure value inside the air intake cavity, which is beneficial for the feeding pipe to be squeezed into the air intake cavity, and the inner diameter of the feeding passage 3 is expanded. Then, by injecting water into the feeding passage 3, the injected water washes away the blockage by virtue of the flushing force, and the patency of the feeding passage 3 is restored, thereby achieving an effective solution to the problem of blockage of the feeding passage of the nutrition tube, improving the normal use efficiency of the nutrition tube 1, and ensuring smooth nutrient delivery.

[0067] Specifically, the process of screening the characteristic data points of the air pressure value change based on the air pressure value change curve includes:

[0068] Calculating the slopes of a plurality of data points on the air pressure value variation curve;

[0069] The data points whose slope exceeds a preset slope threshold are screened as characteristic data points of air pressure value changes.

[0070] In implementation, the value of the preset slope threshold can be determined based on pre-tests and calculations. The pressure change curve of the internal air pressure of the air intake cavity over time during the process of injecting nutrients into the feeding channel 3 is pre-tested and recorded several times, and the slope average of several data points on the pressure change curve is calculated, and the slope average is determined as the preset slope threshold. Preferably, a value of a preset slope threshold is provided here, and the preset slope threshold is 0.15.

[0071] Specifically, the present invention does not limit the method for calculating the slope of the data points on the air pressure value change curve. The slope of the data points on the air pressure value change curve can be calculated by using the differential method. This is a prior art and will not be described in detail here.

[0072] Specifically, see Figure 2 As shown, it is a step diagram of determining the change of air pressure value in an embodiment of the present invention, and the step of determining the change of air pressure value includes:

[0073] Step S201, determining the time node corresponding to each pressure value change characteristic data point on the time coordinate axis;

[0074] Step S202, sorting a number of pressure value change characteristic data points in the order of time nodes in the time dimension;

[0075] Step S203, obtaining the internal air pressure values ​​corresponding to the plurality of air pressure value change characteristic data points on the internal air pressure value coordinate axis, and sorting the plurality of air pressure value change characteristic data points in order of the internal air pressure value from small to large in the air pressure value dimension;

[0076] Step S204: Determine the comparison between the time dimension sorting and the air pressure value dimension sorting as the air pressure value change.

[0077] In implementation, if there are 4 pressure value change characteristic data points A, B, C, and D, determine the time nodes corresponding to the pressure value change characteristic data points A, B, C, and D on the time coordinate axis. For example, the pressure value change characteristic data point A corresponds to the time node ta=5s on the time coordinate axis, the pressure value change characteristic data point B corresponds to the time node tb=10s on the time coordinate axis, the pressure value change characteristic data point C corresponds to the time node tc=20s on the time coordinate axis, and the pressure value change characteristic data point D corresponds to the time node td=55s on the time coordinate axis. According to the order of the time nodes, the pressure value change characteristic data points are sorted in the time dimension as A, B, C, and D. The pressure value change The internal air pressure value corresponding to the characteristic data point A on the internal air pressure value coordinate axis is Pa=103kPa, the internal air pressure value corresponding to the air pressure value change characteristic data point B on the internal air pressure value coordinate axis is Pb=107kPa, the internal air pressure value corresponding to the air pressure value change characteristic data point C on the internal air pressure value coordinate axis is Pc=104kPa, and the internal air pressure value corresponding to the air pressure value change characteristic data point D on the internal air pressure value coordinate axis is Pd=106kPa. Then, the internal air pressure values ​​corresponding to the air pressure value change characteristic data points are sorted in the order of A, C, D, and B in the air pressure value dimension from small to large, that is, the sorting of the air pressure value change characteristic data points in the time dimension is inconsistent with the sorting in the air pressure value dimension.

[0078] Specifically, the process of determining whether the feeding passage 3 has a risk of clogging tendency includes:

[0079] If the time dimension sorting is inconsistent with the air pressure value dimension sorting, it is determined that the feeding channel 3 does not have a blocking trend risk;

[0080] If the time dimension sorting is consistent with the air pressure value dimension sorting, it is determined that the feeding passage 3 has a risk of clogging tendency.

[0081] Specifically, the present invention calculates the slope of the data points in the air pressure change curve, and filters the data points whose slope exceeds the preset slope threshold as the characteristic data points of the air pressure change, so as to keenly capture the abnormal points of the air pressure change, and sort the screened characteristic data points of the air pressure change in two dimensions of time dimension and air pressure value dimension. It can be understood that the sorting of the characteristic data points of the air pressure change in the time dimension is consistent with the sorting of the air pressure value dimension, which indicates that the air pressure value of the characteristic data points of the air pressure change is continuously increasing, and some factors that hinder the flow of nutrients have appeared in the feeding channel 3, resulting in the continuous increase of the air pressure value inside the air intake cavity caused by the feeding channel 3 continuously squeezing the air intake cavity. The blockage trend risk is determined by comparing the sorting of these two dimensions, which further improves the accuracy of the judgment, realizes the dynamic acquisition of the blockage risk of the feeding channel of the feeding tube during the feeding process, and improves the data representativeness of the timely analysis of the circulation of the feeding tube 1.

[0082] Specifically, in the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air inlet cavity once and extracting air once.

[0083] Specifically, the process of implementing the positive and negative pressure operation also includes:

[0084] The amount of air injected at a single time and the amount of air extracted at a single time are adjusted according to the number of characteristic data points of the air pressure value change, and the amount of air injected at a single time and the amount of air extracted at a single time are respectively positively correlated with the number of characteristic data points of the air pressure value change;

[0085] The amount of air blown in at one time is the same as the amount of air extracted at one time.

[0086] Specifically, the present invention forms a relatively stable alternating positive and negative pressure environment in the air intake cavity by blowing and extracting air through positive and negative pressure operations. For the feeding channel of the nutrition tube, the stable alternating positive and negative pressure helps to push the blockage to move and initially alleviate the blockage. It can be understood that when the number of characteristic data points of the air pressure value change is small, it means that the blockage trend is relatively light. At this time, the amount of air blown in and extracted at a single time can be reduced accordingly, which can not only achieve a certain dredging effect, but also avoid excessive impact on the feeding channel 3 due to excessive pressure. On the contrary, if the number of characteristic data points of the air pressure value change is large, it means that the blockage may be more complicated or serious. Correspondingly increasing the amount of air blown in and extracted at a single time can exert stronger positive and negative pressure forces on the blockage, thereby increasing the probability of successful dredging, and further, improving the data representativeness of the timely analysis of the circulation situation of the nutrition tube and optimizing the corresponding prevention mechanism, thereby achieving an effective solution to the blockage problem of the feeding channel of the nutrition tube, improving the normal use efficiency of the nutrition tube 1, and ensuring the smooth progress of nutrition delivery.

[0087] Specifically, the process of determining the internal air pressure value of the air intake channel within the preset pressure measurement time includes:

[0088] The preset pressure measurement time is evenly divided into a pre-pressure measurement time period and a post-pressure measurement time period;

[0089] Calculate the average value of the internal air pressure value of the air inlet channel corresponding to a plurality of time points within the front period of the pressure measurement, and determine the average value as the front period pressure measurement value P1;

[0090] The average value of the internal air pressure value of the air inlet channel corresponding to several time points within the rear period of the pressure measurement is calculated, and the average value is determined as the rear period pressure measurement value P2.

[0091] Specifically, see Figure 3 As shown, it is a logic flow chart of determining whether the feeding channel is abnormal in an embodiment of the present invention. The process of determining whether the feeding channel 3 is abnormal includes:

[0092] If the difference between the front section pressure measurement value P1 and the rear section pressure measurement value P2 meets the preset requirement, it is determined that there is no abnormality in the feeding passage 3;

[0093] If the difference between the front section pressure measurement value P1 and the rear section pressure measurement value P2 does not meet the preset requirement, it is determined that there is an abnormality in the feeding passage 3;

[0094] The preset requirement is that the difference is smaller than a preset difference threshold.

[0095] In implementation, the value of the preset difference threshold is set by technical personnel in this field according to the requirements of detection sensitivity. The higher the required detection sensitivity, the larger the value of the difference threshold. A preferred value is provided here, and the difference threshold can be 2.8kpa.

[0096] Specifically, the present invention divides the preset pressure measurement time equally into a pre-pressure measurement time period and a post-pressure measurement time period, and then calculates the average values ​​of the internal air pressure values ​​corresponding to several time points of the air intake cavity in these two time periods, so as to more carefully capture the air pressure characteristics at different stages in the pressure measurement process, and reflect the stage-by-stage changes in air pressure that may occur in the pressure measurement process. It can be understood that when the feeding channel 3 recovers from slight blockage to normal operation, the internal extrusion force on the feeding pipe becomes smaller, so that the degree to which the feeding pipe squeezes the air intake cavity is weakened, that is, there will be a more obvious difference between the front and rear pressure measurement values. If the difference between the front and rear pressure measurement values ​​is small, it indicates that the degree to which the feeding pipe squeezes the air intake cavity remains almost unchanged, indicating that the feeding pipe is still abnormally blocked. Furthermore, the representativeness of the data for timely analysis of the circulation status of the feeding tube 1 is improved, and the corresponding prevention mechanism is optimized, so as to achieve an effective solution to the problem of blockage of the feeding channel of the feeding tube, improve the normal use efficiency of the feeding tube 1, and ensure smooth nutrient delivery.

[0097] Specifically, see Figure 4 As shown, it is a simplified structural diagram of a nutrition tube and a dredging device for a nutrition tube according to an embodiment of the present invention. The present invention also provides a dredging device for a nutrition tube, including:

[0098] An air inlet cavity is arranged inside the nutrition tube 1 and arranged in parallel with the feeding passage 3 in the nutrition tube 1, and comprises a gas inlet and outlet 4 and a gas cavity 2, so as to blow air into and extract air from the gas cavity 2 through the gas inlet and outlet 4;

[0099] The gas inlet and outlet 4 is also used to seal the air inlet cavity;

[0100] A graph drawing unit connected to the air intake cavity for drawing a pressure change curve of the internal air pressure of the air intake cavity over time and determining whether the feeding passage 3 has a risk of clogging tendency;

[0101] A blowing unit, which is used to blow air into the air inlet cavity, comprises a fan 5 and a pipeline connected to the fan 5;

[0102] An extraction unit, which is used to extract air into the air intake cavity, comprises a negative pressure pump 6 and a pipeline connected to the negative pressure pump 6;

[0103] A three-way valve 7, which is connected to the air inlet channel, the air blowing unit and the extraction unit respectively, and is used to control the connection and disconnection between the air blowing unit and the air inlet channel, and the connection and disconnection between the extraction unit and the air inlet channel;

[0104] A control unit is implemented, which is connected to the blowing unit, the extraction unit and the three-way valve 7 respectively, and is used to control the blowing unit to blow air into the air intake cavity, control the extraction unit to extract air from the air intake cavity and the opening and closing of the three-way valve 7.

[0105] Specifically, a solenoid valve is provided at the gas inlet and outlet 4 to control the opening and closing of the gas inlet and outlet 4, so as to realize the gas flow in the air intake cavity and the sealing of the air intake cavity. The solenoid valve controlling the opening and closing of the inlet and outlet is an existing technology and will not be described in detail here.

[0106] Specifically, the present invention does not limit the specific structure of the graph drawing unit. Preferably, it can be a piezoresistive pressure sensor and a microprocessor that are interconnected, so that the air pressure value in the air intake cavity is collected by the piezoresistive pressure sensor, and the collected air pressure value is sent to the microprocessor for data filtering and generation of a pressure value change curve. This is a prior art and will not be repeated here.

[0107] Specifically, the present invention does not limit the fan 5 of the blowing unit. Preferably, it can be a small centrifugal fan, which will not be described in detail here.

[0108] Specifically, the present invention does not limit the negative pressure pump of the extraction unit. Preferably, it can be a micro negative pressure pump, which will not be described in detail here.

[0109] In implementation, the single operation time of the small centrifugal fan and the single operation time of the micro negative pressure pump are controlled so that the amount of air blown in at a time is the same as the amount of air extracted at a time.

[0110] Specifically, the three-way valve 7 is widely used in the fields of machinery, electricity and fluid control, and will not be described in detail here.

[0111] Specifically, the present invention does not limit the specific structure of the control unit, which can be constructed using logic components. The logic components can be field programmable logic components and processors used in computers, etc., which will not be described in detail here.

[0112] Specifically, the implementation control unit is also connected to a water injection unit 8 , and the water injection unit 8 is connected to the feeding channel 3 of the nutrition tube 1 for injecting water into the feeding channel 3 .

[0113] In practice, a peristaltic pump may be used to inject water into the feeding channel 3 , or a syringe may be used to inject water into the feeding channel 3 , which will not be described in detail here.

[0114] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for unclogging a nutrient tube, characterized in that: include: After blowing air into the air inlet cavity inside the nutrition tube, the cavity is sealed, the pressure of the air inlet cavity is measured during a preset process, and a pressure change curve of the internal air pressure of the air inlet cavity over time is drawn; Wherein, the preset process is the process of injecting nutrients into the feeding channel inside the feeding tube; Determining whether the feeding passage has a risk of clogging tendency according to the air pressure change of the air pressure change curve; Based on the determination result that the feeding passage has a risk of clogging tendency, performing several positive and negative pressure implementation operations on the air intake cavity, wherein the positive and negative pressure implementation operations include blowing air into the air intake cavity and extracting air; The air intake cavity that has completed several positive and negative pressure operations is re-sealed and pressure-measured again, and whether the feeding passage is abnormal is determined based on the comparison of the internal air pressure values ​​of the air intake cavity within a preset pressure measurement time; Based on the determination result that there is an abnormality in the feeding passage, the air in the air intake cavity is discharged, and water is injected into the feeding passage to dredge the feeding passage.

2. The method for dredging a nutrient tube according to claim 1, characterized in that: The process of selecting characteristic data points of air pressure value changes based on the air pressure value change curve includes: Calculating the slopes of a plurality of data points on the air pressure value variation curve; The data points whose slope exceeds a preset slope threshold are screened as characteristic data points of air pressure value changes.

3. The method for dredging a nutrient tube according to claim 2, characterized in that: The steps for determining the change in air pressure value include: Determine the time node corresponding to each characteristic data point of the air pressure value change on the time coordinate axis; Sort the characteristic data points of the pressure value changes in the time dimension according to the order of time nodes; Obtaining the internal air pressure values ​​corresponding to the plurality of air pressure value change characteristic data points on the internal air pressure value coordinate axis, and sorting the plurality of air pressure value change characteristic data points in order of the internal air pressure values ​​from small to large in terms of the air pressure value dimension; The comparison between the time dimension sorting and the air pressure value dimension sorting is determined as the air pressure value change.

4. The method for unclogging a nutrient tube according to claim 3, characterized in that: The process of determining whether a feeding passage has a risk of clogging tendency includes: If the time dimension sorting is consistent with the air pressure value dimension sorting, it is determined that the feeding passage has a risk of clogging tendency.

5. The method for unclogging a nutrient tube according to claim 4, characterized in that: In the positive and negative pressure implementation operation, each positive and negative pressure implementation operation includes blowing air into the air inlet cavity once and extracting air once.

6. The method for unclogging a nutrient tube according to claim 5, characterized in that: The process of implementing the positive and negative pressure operation also includes: The amount of air injected at a single time and the amount of air extracted at a single time are adjusted according to the number of characteristic data points of the air pressure value change, and the amount of air injected at a single time and the amount of air extracted at a single time are respectively positively correlated with the number of characteristic data points of the air pressure value change; The amount of air blown in at one time is the same as the amount of air extracted at one time.

7. The method for unclogging a nutrient tube according to claim 6, characterized in that: The process of determining the internal air pressure value of the air inlet channel within the preset pressure measurement time includes: The preset pressure measurement time is evenly divided into a pre-pressure measurement time period and a post-pressure measurement time period; Calculate the average value of the internal air pressure value of the air inlet channel corresponding to a plurality of time points within the front period of the pressure measurement, and determine the average value as the front period pressure measurement value; The average value of the internal air pressure value of the air inlet channel corresponding to a plurality of time points within the rear period of the pressure measurement is calculated, and the average value is determined as the rear period pressure measurement value.

8. The method for unclogging a nutrient tube according to claim 7, characterized in that: The process of determining whether the feeding passage is abnormal includes: If the difference between the front section pressure measurement value and the rear section pressure measurement value does not meet the preset requirement, it is determined that there is an abnormality in the feeding passage; The preset requirement is that the difference is smaller than a preset difference threshold.

9. A nutrient tube unclogging device, used to perform the nutrient tube unclogging method according to any one of claims 1 to 8, characterized in that: include: An air intake channel is arranged inside the nutrition tube and arranged in parallel with the feeding channel in the nutrition tube, and includes a gas inlet and outlet and a gas cavity, so that air can be blown into and extracted from the gas cavity through the gas inlet and outlet; The gas inlet and outlet are also used to seal the air inlet cavity; A graph drawing unit connected to the air intake cavity for drawing a pressure change curve of the internal air pressure of the air intake cavity over time and determining whether the feeding passage has a risk of clogging tendency; A blower unit, used for blowing air into the air inlet cavity, comprising a blower and a pipe connected to the blower; An extraction unit, which is used to extract air into the air intake cavity, comprising a negative pressure pump and a pipeline connected to the negative pressure pump; A three-way valve, which is respectively connected to the air inlet channel, the air blowing unit and the extraction unit, and is used to control the connection and disconnection between the air blowing unit and the air inlet channel, and the connection and disconnection between the extraction unit and the air inlet channel; A control unit is implemented, which is connected to the blowing unit, the extraction unit and the three-way valve respectively, and is used to control the blowing of air into the air intake cavity by the blowing unit, control the extraction unit to extract air from the air intake cavity and the opening and closing of the three-way valve.

10. The dredging device for a nutrient tube according to claim 9, characterized in that: The implementation control unit is also connected to a water injection unit, and the water injection unit is connected to the feeding channel of the nutrition tube for injecting water into the feeding channel.

Images