CN113081854A

CN113081854A - Nutrition delivery pipe

Info

Publication number: CN113081854A
Application number: CN202110357365.XA
Authority: CN
Inventors: 盛国云; 陈庆林; 王慧泉; 徐传友; 盛健; 徐福宁; 李姚
Original assignee: Nanjing Fmt Medical Co ltd
Current assignee: Nanjing Fmt Medical Co ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-07-09

Abstract

The invention provides a nutrition delivery pipe, which comprises a liquid inlet pipe, a one-way valve, a flexible dropping funnel, a flexible liquid outlet pipe and a peristaltic pump, wherein the liquid inlet pipe is connected with the one-way valve; the one-way valve is communicated with the liquid inlet pipe; the liquid inlet of the one-way valve is communicated with the liquid inlet pipe; the liquid outlet of the one-way valve is communicated with the liquid inlet of the dropping funnel; a liquid inlet of a pump pipe of the peristaltic pump is communicated with a liquid outlet of the dropping funnel; the liquid outlet of the pump pipe of the peristaltic pump is communicated with the liquid outlet pipe. The nutrition delivery pipe is provided with the flexible dropping funnel and the one-way valve, and when the nutrition delivery pipe is blocked, the blocked place can be dredged by pressing the dropping funnel. Because the nutrition delivery pipe is provided with the one-way valve, the pressure of the delivery pipe from the dropping funnel to the blocking position can be increased to be larger than that of the delivery pipe at the rear section of the pipe blocking position by pressing the dropping funnel, and the blocked position can be dredged.

Description

Nutrition delivery pipe

Technical Field

The invention relates to the field of medical instruments, in particular to a nutrition delivery pipe.

Background

For patients with eating difficulties, a nutrition delivery pipe is needed to assist the patients to eat. Sometimes, the nutrient delivery pipe is blocked due to bending of the nutrient delivery pipe or solidification of the delivered nutrient substances. If the nutrition delivery pipe is blocked for a long time, the patient can have the problems of hypoglycemia and the like because nutrient substances cannot be obtained in time. The existing nutrition delivery pipe of the nutrition tube is detected by the expansion of the tube and the photoelectric sensor once the pipe is blocked, and has several disadvantages:

the deformation of the pipe is affected by the hardness and the wall thickness of the pipe, and the difference of the parameters can cause the pipe blockage detection to have faults: the pipe cannot expand due to the fact that the wall of the pipe is thick or the pipe is hard, and the pipe blockage state cannot be detected; when the pipe is soft or the pipe wall is thin, the phenomenon of false alarm can occur when the flow is changed and the pipe is blocked.

The photosensitive sensor is obviously influenced by illumination, and the problem of pipe blockage detection can be caused when the ambient light source is changed. The photosensitive sensor needs to clean the sensor surface frequently, and the phenomenon that the pipe is blocked and cannot be detected can be caused when stains appear on the sensor surface. Since the nutrient solution is generally white or beige, the tube is not transparent after passing through the tube, which can cause the condition that the tube is blocked and can not be detected.

The pipeline is not provided with a pipe flushing device, so that the pipe cannot be flushed in time after the pipe is blocked, and the pipe needs to be replaced or an external injector is connected to flush the pipeline.

Disclosure of Invention

The invention provides a nutrition delivery pipe to solve one or more of the problems.

According to one aspect of the invention, a nutrition delivery pipe is provided, comprising a liquid inlet pipe, a one-way valve, a flexible dropping funnel, a flexible liquid outlet pipe and a peristaltic pump; the liquid inlet of the one-way valve is communicated with the liquid inlet pipe; the liquid inlet of the one-way valve is communicated with the liquid inlet pipe; the liquid outlet pipe is communicated with a liquid outlet of the dripping hopper; a liquid inlet of a pump pipe of the peristaltic pump is communicated with a liquid outlet of the dropping funnel; the liquid outlet of the pump pipe of the peristaltic pump is communicated with the liquid outlet pipe.

The nutrition delivery pipe is provided with the flexible dropping funnel and the one-way valve, and when the nutrition delivery pipe is blocked, the blocked place can be dredged by pressing the dropping funnel. Because the nutrition delivery pipe is provided with the one-way valve, the pressure of the delivery pipe from the dropping funnel to the blocking position can be increased to be larger than that of the delivery pipe at the rear section of the pipe blocking position by pressing the dropping funnel, and the blocked position can be dredged.

In some embodiments, the nutrient delivery tube of the present invention further comprises a plugged tube monitoring device; the pipe blockage monitoring device comprises a feeding pipe, a discharging pipe, a middle pipe, a piston with a sealing ring, a position sensing device and an alarm; the feeding pipe is communicated with a liquid inlet of the peristaltic pump, and the discharging pipe is communicated with a liquid outlet of the peristaltic pump; two ends of the middle pipe are respectively communicated with the feeding pipe and the discharging pipe; the piston is positioned in the middle pipe, the middle pipe is divided into a first space communicated with the feeding pipe and a second space communicated with the discharging pipe, and the piston is not connected with other parts; the position sensing device is used for sensing the position of the piston and is set to enable the alarm to give an alarm when the piston moves to a set position from the second space to the first space; the inlet pipe is communicated with the liquid outlet of the dripping hopper, and the outlet pipe is communicated with the liquid outlet pipe. After the peristaltic pump is started, liquid nutrient substances can enter the alimentary canal of a patient through the liquid inlet pipe, the material inlet pipe, the peristaltic pump, the material outlet pipe and the liquid outlet pipe. When the condition of stifled pipe takes place for the input of peristaltic pump, because the peristaltic pump is still working, can make the pressure in the first space of inlet pipe and intermediate pipe intercommunication diminish, when the pressure in first space is less than the pressure in second space, the piston can move towards the direction in first space, and when position induction system sensed the piston and moved the settlement position to first space by the second space, will start the alarm and send out the police dispatch newspaper, remind medical staff nutrition delivery pipe to have taken place the stifled pipe condition. When the condition of stifled pipe takes place for the output of peristaltic pump, because the peristaltic pump is still working, can make the pressure grow of the second space of discharging pipe and intermediate pipe intercommunication, when the pressure in second space is greater than the pressure in first space, the piston can move toward the direction in first space, and when the sensor sensed the piston and moved the settlement position to first space by the second space, can start the alarm and send the police dispatch newspaper, reminded medical staff nutrition delivery pipe and taken place the stifled pipe condition. The pipe blockage monitoring device for the nutrition conveying pipe is simple in structure, stable in operation and convenient to operate. Due to the sealing ring arranged on the piston, the piston is always located at the initial position in the middle pipe under the normal condition. When the pressure difference exists between the first space and the second space, the piston moves to the side with the smaller pressure.

In some embodiments, the position sensing device of the present invention comprises a magnetic switch and a magnet disposed on the plunger. From this, have small in size, the stable effect of operation, and the colour of nutrient solution and external light, dust etc. can not exert an influence to stifled pipe monitoring.

In some embodiments, a plug is arranged at one end of the discharge pipe of the nutrition delivery pipe, which is communicated with the middle pipe, and the outer diameter of the plug is larger than that of the piston; the outer diameter of one end, entering the middle pipe, of the plug is far smaller than the inner diameter of the discharge pipe, and the length of one end, entering the middle pipe, of the plug is set to be capable of pushing the piston to the initial position.

In some embodiments, the nutrient delivery tube of the present invention further comprises a control device; the position sensing device is arranged to output a position sensing signal to the control device when the piston moves to a set position from the second space to the first space; the control device is used for receiving the position sensing signal and outputting a first control instruction to the alarm according to the position sensing signal; the alarm is used for receiving the first control instruction and giving an alarm.

In some embodiments, the nutrient delivery tube of the present invention further comprises a control device; the position sensing device is arranged to output a position sensing signal to the control device when the piston moves to a set position from the second space to the first space; the control device is used for receiving the position sensing signal and outputting a second control instruction to the peristaltic pump and the alarm according to the position sensing signal; the alarm is used for receiving the second control instruction and giving an alarm; the second control instruction is set as: the alarm gives an alarm, and the rotating speed of the peristaltic pump is adjusted to be 0.

In some embodiments, the nutrient delivery tube of the present invention further comprises a bubble monitoring device and an alarm configured to sound an alarm when bubbles are detected in the inlet and outlet tubes.

In some embodiments, the bubble monitoring device of the nutrient delivery tube of the present invention comprises a light sensitive sensor and a light source; the photosensitive sensor is arranged on the outer side of the feeding pipe, the discharging pipe, the liquid outlet pipe or the liquid inlet pipe, and the light source is arranged opposite to the photosensitive sensor; the feed pipe or the liquid inlet pipe is made of transparent materials; the photosensitive sensor is used for sensing light emitted by the light source, and the alarm is used for giving an alarm when the photosensitive sensor senses the light. Therefore, whether nutrient solution is delivered in the nutrient delivery pipe or not can be monitored.

In some embodiments, the nutrient delivery tube of the present invention further comprises a control device; the photosensitive sensor is arranged to output a light sensing signal to the control device when the photosensitive sensor senses light; the control device is used for receiving the light induction signal and outputting a third control instruction to the alarm according to the light induction signal; the alarm is used for receiving the third control instruction and giving an alarm; the third control instruction is set as: the alarm gives an alarm, and the rotating speed of the peristaltic pump is adjusted to be 0.

In some embodiments, the nutrition delivery pipe further comprises a tee joint, two ends of the tee joint are communicated with the liquid outlet pipe, and a silica gel seal is arranged at the third end of the tee joint. Can facilitate the injection of the medicine into the nutrition delivery pipe.

Drawings

FIG. 1 is a schematic view of a nutrient delivery tube according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

FIG. 3 is a schematic diagram of the structure of the feed pipe, the discharge pipe, and the intermediate pipe of a nutrition delivery pipe according to an embodiment of the present invention.

Fig. 4 is a schematic signal transmission mode diagram of a monitoring device for nutrition delivery pipe blockage according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 to 3 schematically show the structure of a nutrition delivery tube according to an embodiment of the present invention.

Referring to fig. 1 and 2, the nutrient delivery tube includes: a liquid inlet pipe 11, a one-way valve 13, a flexible dropping funnel 14, a liquid outlet pipe 12 and a peristaltic pump 10. The dropping funnel 14 may be made of a flexible material such as silicone rubber, and the inner space of the dropping funnel 14 may be reduced by squeezing the outer wall of the dropping funnel 14 with fingers. Peristaltic pump 10 may be replaced with other pumps suitable for delivering liquid substances.

The liquid inlet of the one-way valve 13 is communicated with the liquid inlet pipe 11, the liquid outlet of the one-way valve 13 is communicated with the liquid inlet of the dripping hopper 14, and the liquid outlet pipe 12 is communicated with the liquid outlet of the dripping hopper 14.

The liquid inlet of the pump pipe of the peristaltic pump 10 is communicated with the liquid outlet of the drip chamber 14, and the liquid outlet of the pump pipe of the peristaltic pump 10 is communicated with the liquid outlet pipe 12.

The liquid inlet of the liquid inlet pipe 11 is provided with a puncture device 16 for puncturing a container for containing nutrient solution. The liquid outlet of the liquid outlet pipe 12 is provided with a nose intestine pipe joint 17.

When the nutrition delivery pipe is blocked, the blocked place can be dredged by pressing the dropping funnel 14. Because the nutrition delivery pipe is provided with the check valve 13, the pressure intensity of the delivery pipe from the dropping funnel 14 to the blocking position can be increased to be larger than that of the delivery pipe at the rear section of the pipe blocking position by pressing the dropping funnel 14, and the blocked position can be dredged.

The nutrient delivery tube may also include a plugged tube monitoring device. The pipe blockage monitoring device comprises a feeding pipe 41, a discharging pipe 42, an intermediate pipe 40, a piston 50 with a sealing ring 51, a position sensing device 70 and an alarm 90. Referring to fig. 3, the feed pipe 41, the discharge pipe 42 and the intermediate pipe 40 may be provided in an H-shape, and both ends are reinforced by brackets 74. The feeding pipe 41, the discharging pipe 42 and the pump pipe of the peristaltic pump 10 are communicated in an opposite insertion mode through pagoda joints, the O-shaped ring is sleeved outside the plug 43 and is sealed and then connected with the discharging pipe 42 through threads, glue does not need to be used for bonding and sealing the whole body, and reliability of the product is improved.

The feeding pipe 41 is communicated with a liquid inlet of the peristaltic pump 10, the discharging pipe 42 is communicated with a liquid outlet of the peristaltic pump 10, two ends of the middle pipe 40 are respectively communicated with the feeding pipe 41 and the discharging pipe 42, the piston 50 is positioned inside the middle pipe 40, the middle pipe 40 is divided into a first space 61 communicated with the feeding pipe 41 and a second space 62 communicated with the discharging pipe 42, the piston 50 is not connected with other parts, and the situations that pipe blockage or springs are corroded due to too many pipe parts can be avoided.

The position sensing device 70 is used for sensing the position of the piston 50 and is configured to make the alarm give an alarm when the piston 50 moves from the second space 62 to the first space 61 to a set position.

The inlet pipe 41 is communicated with the outlet of the drip chamber 14, and the outlet pipe 42 is communicated with the outlet pipe 12.

After the peristaltic pump 10 is started, the liquid nutrient substance will enter the digestive tract of the patient through the liquid inlet pipe 11, the material inlet pipe 41, the peristaltic pump 10, the material outlet pipe 42 and the liquid outlet pipe 12.

When the input end of the peristaltic pump 10 is blocked, the peristaltic pump 10 is still working, so that the pressure intensity of the first space 61 communicated with the feeding pipe 41 and the intermediate pipe 40 is reduced, when the pressure intensity of the first space 61 is smaller than that of the second space 62, the piston 50 moves towards the first space 61, and when the position sensing device 70 senses that the piston 50 moves from the second space 62 to the first space 61 to a set position, the alarm 90 is started to give an alarm to remind medical staff that the nutrition feeding pipe is blocked.

When the output end of the peristaltic pump 10 is blocked, the peristaltic pump 10 still works, so that the pressure intensity of the second space 62 communicated with the discharge pipe 42 and the intermediate pipe 40 is increased, when the pressure intensity of the second space 62 is greater than the pressure intensity of the first space 61, the piston 50 can move towards the first space 61, and when the position sensing device 70 senses that the piston 50 moves to a set position from the second space 62 to the first space 61, the alarm 90 can be started to give an alarm to remind medical staff that the nutrition delivery pipe is blocked.

Upon receiving a blocked tube alarm, the medical professional can turn off the peristaltic pump 10 and press the drip chamber 14 to eliminate the blocked tube condition. If the drip chamber 14 is not depressed to eliminate the condition of a clogged tube, the medical personnel can replace the delivery tube.

Due to the sealing ring 51 provided on the piston 50, the piston 50 will always be in the initial position in the intermediate tube 50 under normal conditions. When there is a pressure difference between the first space 61 and the second space 62, the piston 50 moves to a side where the pressure is small. In the process of removing the pipe blockage, the dropping funnel 14 is pressed to make the pressure of the first space 61 greater than that of the second space 62, and the piston 50 moves towards the second space 62 to return to the initial position.

In this embodiment, the position sensing device 70 includes a magnetic switch 71 and a magnet 72 disposed inside the piston 50. The magnet 72 may be insulated from the outside by the photo-curing glue to prevent oxidation that may cause rusting or magnet failure. The magnetic switch 71 is small and exquisite in size and stable in operation. In other embodiments, the position sensing device may be a reed switch and magnet, or a light-sensitive sensor, etc.

A plug 43 is arranged at one end of the discharge pipe 42, which is communicated with the intermediate pipe 40, and the outer diameter of the plug 43 is larger than that of the piston 50. The end of plug 43 that enters intermediate tube 40 has an outer diameter that is much smaller than the inner diameter of discharge tube 42, and the length of the end of plug 43 that enters intermediate tube 40 is set to push piston 50 to the initial position. The stopper 43 is screwed onto the tapping pipe 42.

The nutrition delivery tube of the present invention further comprises a bubble monitoring device 20 configured to issue an alarm 90 when it is detected that bubbles are present in the feed tube 41, the discharge tube 42, the liquid outlet tube 12 or the liquid inlet tube 11.

Referring to fig. 2, in the present embodiment, the bubble monitoring device 20 includes a photosensor 21 and a light source 22. Photosensitive sensor 21 is arranged outside feed pipe 41, discharge pipe 42, liquid outlet pipe 12 or liquid inlet pipe 11, and light source 22 is arranged opposite to photosensitive sensor 21. The feed pipe 41 or the liquid inlet pipe 11 is made of transparent material. The light sensitive sensor 21 is arranged to sense light from the light source and is arranged such that when the light sensitive sensor 21 senses light, the alarm 90 issues an alarm. The bubble monitoring device 20 can monitor whether the nutrient solution is delivered in the nutrient delivery pipe or not and whether the peristaltic pump 10 idles or not. When the feeding pipe 41, the discharging pipe 42, the liquid outlet pipe 12 or the liquid inlet pipe 11 is not used for conveying nutrient solution, the feeding pipe 41, the discharging pipe 42, the liquid outlet pipe 12 or the liquid inlet pipe 11 is transparent, light can penetrate through the feeding pipe, when the photosensitive sensor 21 senses the light, the alarm 90 gives an alarm to remind medical personnel of treating the problem that the nutrient solution conveying pipe is lack of nutrient solution. In this embodiment, the alarm 90 is a buzzer. In other embodiments, the alarm 90 may also be a display alarm device on a screen.

The nutrition delivery pipe can also comprise a tee joint, two ends of the tee joint are communicated with the liquid outlet pipe 12, and the third end of the tee joint is provided with a silica gel seal and can be used for injecting medicines into the nutrition delivery pipe.

Figure 4 schematically illustrates the signal transmission of a feeding tube according to one embodiment of the invention.

Referring to fig. 3, the nutrient delivery tube of the present invention may also include a control device 80.

The position sensing device 70 is used for sensing the position of the piston 50, and is configured to output a position sensing signal to the control device 80 when the piston 50 moves from the second space 62 to the first space 61 to a set position.

The control device 80 is configured to receive the position sensing signal and output a control command to the alarm 90 according to the position sensing signal. The alarm 90 is used for receiving the control command and giving an alarm.

In one embodiment, the control instruction may be set as a first control instruction: the alarm 90 issues an alarm. Referring to fig. 1, the position sensing device 70 includes a magnetic switch 71, and a magnet 72 disposed inside the piston 50. The magnetic switch 71 is disposed outside the feeding pipe 41 on a side close to the first space 61.

When the piston 50 moves from the second space 62 to the first space 61 to the position where the magnetic switch 71 senses the magnet 72, the control device 80 of the magnetic switch 71 outputs a sensing signal, the control device 80 receives the position sensing signal and sends an alarm control instruction to the alarm 90, and the alarm 90 sends an alarm after receiving the alarm control instruction, so that medical staff are reminded that the pipe blockage situation occurs in the nutrition delivery pipe and the pipe blockage fault needs to be timely handled. The setting of the first control instruction may further include parameters such as an alarm duration, an alarm volume, and the like.

In another embodiment, the control device is configured to receive the position sensing signal and output a second control command to the peristaltic pump 10 and the alarm 90 based on the position sensing signal. The alarm 90 is used for receiving the second control instruction and giving an alarm. The second control instruction is set as: the alarm 90 alarms and the speed of the peristaltic pump 10 is adjusted to 0.

When the piston 50 moves from the second space 62 to the first space 61 to the position where the magnetic switch 71 senses the magnet 72, the control device 80 of the magnetic switch 71 outputs a sensing signal, the control device 80 receives the position sensing signal and sends an alarm control instruction to the alarm 90, and the alarm 90 sends an alarm after receiving the alarm control instruction, so that medical staff are reminded that the pipe blockage situation occurs in the nutrition delivery pipe and the pipe blockage fault needs to be timely handled. At the same time, the peristaltic pump 10 stops rotating, which protects the entire system from damage.

The bubble monitoring device 20 includes a photosensitive sensor 21 and a light source 22. The light sensor 21 is used for sensing light emitted by the light source, and is configured to output a light sensing signal to the control device 80 when the light sensor 21 senses the light. The control device 80 is configured to receive the light sensing signal and output a third control command to the alarm according to the light sensing signal. The alarm is used for receiving the third control instruction and giving an alarm. The third control instruction is set as: the alarm 90 alarms and the speed of the peristaltic pump 10 is adjusted to 0.

When no nutrient solution is fed into the feeding pipe 41, the discharging pipe 42, the liquid outlet pipe 12 or the liquid inlet pipe 11, the feeding pipe 41, the discharging pipe 42, the liquid outlet pipe 12 or the liquid inlet pipe 11 are transparent and light can pass through. When the photosensor 21 senses light, a light sensing signal is output to the control device 80. The control device 80 receives the light sensing signal and outputs a third control command to the alarm. The alarm 90 receives the third control instruction and issues an alarm.

The setting of the third control instruction may further include parameters such as how long the photosensitive sensor senses light, an alarm duration, and an alarm volume.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A nutrition delivery tube, comprising: a liquid inlet pipe, a one-way valve, a flexible dropping funnel, a liquid outlet pipe and a peristaltic pump;

the liquid inlet of the one-way valve is communicated with the liquid inlet pipe;

the liquid outlet pipe is communicated with a liquid outlet of the dripping hopper;

a liquid inlet of a pump pipe of the peristaltic pump is communicated with a liquid outlet of the dropping funnel; the liquid outlet of the pump pipe of the peristaltic pump is communicated with the liquid outlet pipe.

2. The nutrient delivery tube of claim 1, further comprising a plugged tube monitoring device;

the pipe blockage monitoring device comprises a feeding pipe, a discharging pipe, a middle pipe, a piston with a sealing ring, a position sensing device and an alarm;

the feeding pipe is communicated with a liquid inlet of the peristaltic pump, and the discharging pipe is communicated with a liquid outlet of the peristaltic pump;

two ends of the middle pipe are respectively communicated with the feeding pipe and the discharging pipe;

the piston is positioned in the middle pipe, the middle pipe is divided into a first space communicated with the feeding pipe and a second space communicated with the discharging pipe, and the piston is not connected with other parts;

the position sensing device is used for sensing the position of the piston and is arranged to enable the alarm to give an alarm when the piston moves to a set position from the second space to the first space;

the inlet pipe is communicated with the liquid outlet of the dripping hopper, and the outlet pipe is communicated with the liquid outlet pipe.

3. The nutrition delivery tube of claim 2, wherein the position sensing device comprises a magnetic switch and a magnet disposed on the piston.

4. The nutrient delivery pipe of claim 2, wherein a plug is arranged at one end of the discharge pipe, which is communicated with the middle pipe, and the outer diameter of the plug is larger than that of the piston;

the outer diameter of one end, entering the middle pipe, of the plug is far smaller than the inner diameter of the discharge pipe, and the length of one end, entering the middle pipe, of the plug 43 is set to be capable of pushing the piston to the initial position.

5. A nutrient delivery tube according to any one of claims 2 to 4, further comprising a control device;

the position sensing device is arranged to output a position sensing signal to the control device when the piston moves from the second space to the first space to a set position;

the control device is used for receiving the position sensing signal and outputting a first control instruction to the alarm according to the position sensing signal;

the alarm is used for receiving the first control instruction and giving an alarm.

6. A nutrient delivery tube according to any one of claims 2 to 4, further comprising a control device;

the control device is used for receiving the position sensing signal and outputting a second control instruction to the peristaltic pump and the alarm according to the position sensing signal;

the alarm is used for receiving the second control instruction and giving an alarm;

the second control instruction is set as: the alarm gives an alarm, and the rotating speed of the peristaltic pump is adjusted to be 0.

7. The nutrient delivery tube of claim 1, further comprising a bubble monitoring device and an alarm configured to issue an alarm when bubbles are detected in the inlet and outlet tubes.

8. The nutrition delivery tube of claim 8, wherein the bubble monitoring device comprises a light sensitive sensor and a light source;

the photosensitive sensor is arranged on the outer side of the feeding pipe, the discharging pipe, the liquid outlet pipe or the liquid inlet pipe, and the light source and the photosensitive sensor are arranged oppositely;

the feed pipe or the liquid inlet pipe is made of transparent materials;

the photosensitive sensor is used for sensing the light emitted by the light source, and the alarm is arranged to give an alarm when the photosensitive sensor senses the light.

9. The nutrient delivery tube of claim 8, further comprising a control device;

the photosensitive sensor is arranged to output a light sensing signal to the control device when the photosensitive sensor senses light;

the control device is used for receiving the light induction signal and outputting a third control instruction to the alarm according to the light induction signal;

the alarm is used for receiving the third control instruction and giving an alarm;

the third control instruction is set as: the alarm gives an alarm, and the rotating speed of the peristaltic pump is adjusted to be 0.

10. The nutrition delivery tube of claim 1, further comprising a tee joint having two ends communicating with the liquid outlet tube, wherein a silicone seal is provided at a third end of the tee joint.