A nasogastric feeding device for digestive tract care with anti-reflux function

Abstract

The present invention discloses a nasogastric feeding device for nursing the digestive tract with anti-backflow, which relates to the field of nasogastric feeding technology, including a feeding device and a hose, wherein the feeding device includes a driving rod and a housing, the upper and lower ends of the housing are respectively provided with end caps and a sleeve, a pressing plate and a mesh plate are installed inside the housing, a cavity is formed between the end cap and the sleeve, a four-way pipe is installed on the end cap, an air pump and a control valve are installed inside the four-way pipe, the pressing plate and the mesh plate are provided with a driving rod, and the four ports of the four-way pipe are respectively connected to the external environment, the cavity, the air pump and the space inside the housing. The present invention performs air extraction before food processing to prevent the liquid food from carrying a large amount of air into the patient's stomach during the infusion period, thereby preventing the patient from experiencing bloating. At the same time, the hose is provided with an anti-backflow mechanism to prevent the phenomenon of gastric fluid backflow due to the patient's body posture.

Description

Technical Field

[0001] The invention relates to the technical field of nasogastric feeding, in particular to a nasogastric feeding device for digestive tract care and preventing backflow. Background Art

[0002] Nasogastric feeding is a method in which a gastric tube is artificially placed into the esophagus through the nasal cavity under special circumstances. The food is first ground into a paste using a grinder, and a large syringe is used to connect the large feeding port below the gastric tube connector. After the connection is secure, the push rod piston is manually pressurized to pump water and food into the patient's stomach to help patients who cannot swallow independently provide water and food to maintain metabolism, weight and nutrition in the body. Gastric tubes come in different sizes, and thin tubes are less likely to be damaged and easily clogged.

[0003] Patients with severe pancreatitis, inflammatory bowel disease and other diseases in the gastroenterology department need to use a nasogastric tube to take liquid food during the treatment and rehabilitation stage. Among them, the liquid food that needs to be processed by themselves needs to be manually injected into the nasogastric tube on time using a glycerin syringe. It is very inconvenient to use and can easily cause damage to the stomach. The indwelling of a gastric tube in the esophagus changes the patient's original digestive tract physiological environment. That is, the indwelling of a gastric tube can cause the lower esophageal sphincter at the end of the esophagus to not close tightly, which can easily cause esophageal reflux. It is only used temporarily or short-term for patients who are comatose or unable to swallow and eat by themselves. Summary of the Invention

[0004] The purpose of the present invention is to provide a nasogastric feeding device for digestive tract care that prevents backflow, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a nasogastric feeding device for digestive tract care with anti-reflux function, comprising a feeding device and a hose, the feeding device comprising an air pump, a driving rod and a housing, the upper and lower ends of the housing being respectively provided with end caps and a sleeve, a pressing plate and a mesh plate being installed inside the housing, a cavity being formed between the end caps and the sleeve, a four-way pipe being installed on the end cap, an air pump and a control valve being installed inside the four-way pipe, and the driving rod being installed on the pressing plate and the mesh plate;

[0006] The four ports of the four-way pipe are respectively connected to the external environment, the cavity, the air pump and the space inside the shell;

[0007] The sleeve is sleeved with the shell, and a discharge pipe is installed in the middle of the sleeve, and the discharge pipe is connected to the hose; open the end cover above the shell, and the end cover is separated from the shell together with the pressure plate, drive rod and mesh plate, and the food to be processed is placed in the space inside the shell, and then the end cover is connected to the shell again, and then the drive rod between the pressure plate and the mesh plate is controlled to work, wherein the drive rod performs reciprocating telescopic work, and the output end of the drive rod drives the mesh plate to perform reciprocating lifting and lowering motion, so as to realize continuous separation and engagement between the pressure plate and the mesh plate, thereby realizing the crushing of food inside the shell, and the discharge pipe is connected to the hose.

[0008] Furthermore, the outer side of the driving rod is sleeved with a limiting sleeve, the outer wall of the limiting sleeve is provided with a threaded groove, the lower end of the driving rod is installed with a movable sleeve and a threaded sleeve, the driving rod is connected to the mesh plate through the movable sleeve and the threaded sleeve, and the threaded sleeve is meshed with the limiting sleeve; the outer side of the driving rod is installed with a limiting sleeve, and the movable sleeve and the threaded sleeve are connected at the same time, and the outer wall of the limiting sleeve is provided with two slots, and fixed rods are installed on both sides of the output end of the driving rod, the driving rod is connected to the movable sleeve through the fixed rod through the slot, and the driving rod drives the threaded sleeve to slide up and down along the outer wall of the limiting sleeve through the movable sleeve. The sleeve is meshed with the limit sleeve, and the outer wall of the limit sleeve is provided with a threaded groove, so that the threaded sleeve can rotate while sliding up and down along the outer wall of the limit sleeve. Since the threaded sleeve is connected to the mesh plate, the mesh plate can move synchronously with the threaded sleeve. The pressing plate is connected to the end cover. When the mesh plate rises, the mesh plate squeezes the food between the pressing plate and the mesh plate, and at the same time, the mesh plate in the rotating state cuts the food until the food passes through the mesh and enters the bottom of the mesh plate under the action of squeezing. When the mesh plate descends, the mesh plate crushes the food below until the food passes through the mesh and enters the top of the mesh plate.

[0009] Furthermore, a plurality of connecting rod groups are installed on the outside of the mesh plate, and the connecting rod group consists of two connecting rods and two spring shafts, the connecting rods and the spring shafts are alternately connected, and the lower end of the connecting rod group is rotatably connected to the mesh plate through the spring shaft; the connecting rod group is used to be installed on the outside of the mesh plate, wherein during the rising period of the mesh plate, the distance between the mesh plate and the pressure plate continues to decrease, and the two connecting rods fold under the action of pressure, and at the same time, the connecting rod group rotates synchronously with the mesh plate, thereby squeezing the food between the pressure plate and the mesh plate, and large pieces of food are first initially crushed by the plurality of connecting rod groups under the squeezing of the pressure plate and the mesh plate, and then due to the reduction in the space between the pressure plate and the mesh plate, the crushed food is then crushed again through the mesh on the mesh plate.

[0010] Furthermore, the upper end surface of the connecting rod group is in contact with the lower end surface of the pressure plate, and one side surface of the connecting rod group coincides with the outer wall of the mesh plate. The outer diameter of the mesh plate is the same as the inner diameter of the shell, and a groove matching the size of the outer wall of the connecting rod group is provided on the mesh plate; when the mesh plate is rising, until the pressure plate and the mesh plate are in contact with each other, the connecting rod group is in a folded state and stored in the groove on the mesh plate to ensure that the food between the pressure plate and the mesh plate passes through the mesh completely, and the food above the mesh plate is all squeezed to the bottom of the mesh plate. When the mesh plate is descending, the connecting rod inside the connecting rod group begins to stretch until the lower end surface of the mesh plate is about to be in contact with the upper end surface of the shell. At this time, the two connecting rods inside the connecting rod group are both in a vertical state, and the side walls of the connecting rods are in contact with the side walls of the shell. At this time, the rotating mesh plate and the connecting rod group scrape off the food attached to the upper inner wall of the shell.

[0011] Furthermore, the limiting sleeve passes through the mesh plate and is connected to the discharge pipe, and the outer wall of the discharge pipe is provided with an arc transition, the outer wall size of the discharge pipe matches the inner wall size of the sleeve, the sleeve is slidably connected to the shell, and a water inlet pipe is installed on one side of the shell; after the supply equipment completes the perfusion, the discharge pipe and the hose are separated, and the air inside the air pump cavity is used to reduce the cavity size to a minimum. At this time, the upper end surface of the pressure plate is fitted with the lower end surface of the end cover, and the water inlet pipe is connected to the water pipe and water is injected into the shell. At the same time, the shell and the sleeve are separated to the maximum extent by the air pressure difference. Since the end cover is connected to the discharge pipe through the limiting sleeve, the separated sleeve is synchronously separated from the discharge pipe, and the drive rod is started again to move in a reciprocating lifting manner. The drive rod drives the mesh plate and the connecting rod group, so that the internal structure of the shell can be cleaned, and the water leaving the shell can pass through the inner and outer sides of the discharge pipe to complete the cleaning of the discharge pipe.

[0012] Furthermore, a plurality of rubber covers are provided inside the end of the hose, and the rubber covers are circumferentially distributed at one end of the hose, and a plurality of the rubber covers are semicircular, and a rubber reed is installed between the hose and the rubber cover; before the hose is connected to the discharge pipe, the hose needs to be extended into the patient's stomach through the patient's nasal cavity, so that the feeding device can input the crushed liquid food into the patient's stomach through the hose, wherein during the extension process of the hose, the rubber cover at the front end of the hose is in a gathered state under the action of the rubber reed, and the plurality of rubber covers in the gathered state form a semicircular rubber cap at the front end of the hose, and the rubber cap is The outer diameter and inner diameter are respectively the same as the outer diameter and inner diameter of the hose. Since the front end of the hose forms a semi-closed spherical shape under the action of the rubber cover and the rubber reed, the hose will not scratch the patient's nasal cavity wall, esophageal cavity wall and stomach wall through the spherical surface during the insertion process. At the same time, it prevents the patient's body fluids from entering the hose through the front end of the hose during the insertion period. During the subsequent injection of liquid food, the supply equipment infuses the liquid food into the hose through pressure and finally outputs it to the patient's stomach. In addition, during the subsequent insertion of the hose into the patient's body, gastric fluid will not flow back through the hose due to the patient's body posture.

[0013] Furthermore, the airflow control end of the four-way tube is connected to the air pump, and there are two bifurcated ports in the four-way tube. A constant pressure mechanism and a control valve are respectively installed inside the two bifurcated ports. The two ports controlled by the constant pressure mechanism are respectively connected to the air pump and the external environment, and the two ports controlled by the control valve are respectively connected to the cavity and the space inside the shell; before the supply device processes the food, it is necessary to extract the air inside the shell to prevent the air inside the supply device and the air carried inside the food from being output to the patient's stomach during the infusion process of the liquid food. Four ports are provided on the four-way tube, and two bifurcated ports are formed when the four ports are connected. Two of the four ports are connected to the air pump and the internal space of the shell, and the two ports connected to the control valve are respectively located in the internal space of the shell and in the cavity. During the period when the air pump extracts the air inside the shell, the supply device controls the port connected to the cavity to be closed, so that the two ports connected to the internal space of the shell and the air pump form a hollow space. The port connected to the external environment is closed by the constant pressure mechanism, and then the air pump is driven to extract the air inside the shell. As the air inside the shell is continuously extracted, the air pressure inside the shell is reduced. At this time, the constant pressure mechanism changes the closed state, and the port connected to the external environment is opened, and the outside air is extracted through the air pump. After the state of the constant pressure mechanism changes, the supply device controls the air pump to stop working. At this time, most of the air inside the shell is extracted; when the supply device needs to output liquid food, the supply device controls the port connected to the cavity to open, and the port connected to the external environment is closed by the constant pressure mechanism. At this time, the air pump inputs air into the cavity through the four-way pipe. The cavity is formed by the end cover and the pressure plate in conjunction with the shell, and the pressure plate is engaged with the limit sleeve. As the air volume between the end cover and the pressure plate rises, the pressure plate descends along the outer wall of the limit sleeve, and opens the valve inside the discharge pipe. The liquid food inside the shell is infused into the patient's stomach through the hose under the action of pressure.

[0014] Furthermore, the constant pressure mechanism includes a main spring and a slider, the slider is composed of a cylinder and cones at both ends, the main spring is installed on both sides of the cylinder, the length of the cylinder is smaller than the inner diameter of the four-way tube, and triangular cavities are provided at both ends of the four-way tube, and one end of the main spring is connected to the triangular cavity; the slider is connected to the four-way tube through the main spring, and when the supply device extracts the air inside the shell through the air pump, the air pressure inside the shell drops. At this time, the upper and lower ends of the slider are respectively located in the ambient air pressure and the air pressure inside the shell. Under the action of the air pressure difference, the slider descends along the inner wall of the four-way tube, and the two ends of the main spring are rotatably connected to the slider and the four-way tube respectively, wherein an angle deflection sensor is installed inside the rotating shaft on one side of the main spring. When the slider is descending or ascending, the main spring is in a stretched and deflected state, and the angle deflection sensor monitors the angle state of the main spring in real time, and feeds back the monitoring value to the control inside the supply device. The control body, when the slider drops to a certain length, the angle of the main spring after deflection is converted by the angle deflection sensor into a numerical value and transmitted to the control body, indicating that most of the air inside the shell is extracted, or when the slider rises to a certain length, the angle of the main spring after deflection is converted by the angle deflection sensor into a numerical value and transmitted to the control body, indicating that the cavity is in the maximum expansion state, and the fluid food inside the shell is completed. The length of the cylinder is smaller than the inner diameter of the four-way pipe. After most of the air inside the shell is extracted, the port connected to the external environment is connected to the port connected to the air pump due to the change in the position of the slider. At this time, the air pump mainly extracts air from the external environment until the air pump stops working. A small amount of air is added to the shell through the four-way pipe to change the air pressure inside the shell, causing the slider to rise, and the port connected to the external environment is closed by the slider again.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The anti-reflux digestive tract nursing nasogastric feeding device has a hose, and the front end of the hose forms a semi-closed spherical shape under the action of a rubber cover and a rubber reed. When the hose is inserted, the spherical surface will not scratch the patient's nasal cavity wall, esophageal cavity wall, and stomach wall. At the same time, it prevents the patient's body fluids from entering the hose through the front end of the hose during the insertion process, thereby preventing the occurrence of reflux.

[0017] 2. This anti-reflux digestive tract nursing nasogastric feeding device is equipped with a pressure plate and a mesh plate, which are connected by a driving rod and its auxiliary structure. The driving rod is used to crush food during operation, and the connecting rod group has a preliminary crushing effect on large-volume food. After the feeding device is filled with liquid food, it cooperates with the water flow to achieve a self-cleaning effect, so that the feeding device can be used next time;

[0018] 3. The anti-reflux nasogastric feeding device for digestive tract care is equipped with a constant pressure mechanism. The constant pressure mechanism cooperates with the air pump and the four-way tube to extract air before food processing to prevent the liquid food from carrying a large amount of air into the patient's stomach during the infusion, thereby causing bloating in the patient's body. At the same time, it cooperates with the pressure plate to realize the liquid food infusion work and achieve stable infusion through air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0021] Figure 2 The present invention Figure 1 Middle A is a schematic diagram of the enlarged structure;

[0022] Figure 3 The present invention Figure 1 The enlarged structural diagram at B in the middle;

[0023] Figure 4 This is a schematic diagram of the main cross-section structure of the present invention in the cleaning state;

[0024] Figure 5 It is a schematic diagram of the top view of the full cross-section structure of the present invention;

[0025] Figure 6 The present invention Figure 5 The enlarged structural diagram at C in the middle;

[0026] Figure 7 This is a partial cross-sectional structural diagram of the hose output end of the present invention;

[0027] Figure 8 It is a schematic diagram of the top view of the rubber reed of the present invention.

[0028] In the figure: 1. Hose; 101. Rubber cover; 102. Rubber reed; 2. Air pump; 3. Drive rod; 301. Limit sleeve; 302. Movable sleeve; 303. Threaded sleeve; 4. Housing; 5. End cover; 6. Sleeve shell; 7. Pressure plate; 8. Mesh plate; 801. Connecting rod assembly; 9. Cross-tube; 11. Discharge pipe; 12. Constant pressure mechanism; 1201. Main spring; 1202. Slider; 13. Water inlet pipe. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-8 The present invention provides a technical solution: a nasogastric feeding device for digestive tract nursing with anti-backflow, comprising a feeding device and a hose 1, the feeding device comprising an air pump 2, a driving rod 3 and a housing 4, a driving rod 3 being installed between a pressing plate 7 and a mesh plate 8, a limiting sleeve 301 being sleeved on the outer side of the driving rod 3, a threaded groove being provided on the outer wall of the limiting sleeve 301, a movable sleeve 302 and a threaded sleeve 303 being installed on the lower end of the driving rod 3, the driving rod 3 being connected to the mesh plate 8 through the movable sleeve 302 and the threaded sleeve 303, and the threaded sleeve 303 being engaged with the limiting sleeve 301;

[0031] The upper and lower ends of the shell 4 are respectively installed with end covers 5 and a sleeve 6. The interior of the shell 4 is installed with a pressure plate 7 and a mesh plate 8. There is a cavity between the end cover 5 and the sleeve 6.

[0032] Several groups of connecting rods 801 are installed on the outside of the mesh plate 8. The connecting rod group 801 consists of two connecting rods and two spring shafts. The connecting rods and the spring shafts are alternately connected. The lower end of the connecting rod group 801 is rotatably connected to the mesh plate 8 through the spring shaft.

[0033] The upper end surface of the connecting rod group 801 is in contact with the lower end surface of the pressure plate 7, and one side surface of the connecting rod group 801 coincides with the outer wall of the mesh plate 8. The outer diameter of the mesh plate 8 is the same as the inner diameter of the shell 4. The mesh plate 8 is provided with a groove that matches the size of the outer wall of the connecting rod group 801.

[0034] The limiting sleeve 301 passes through the mesh plate 8 and is connected to the discharge pipe 11. The outer wall of the discharge pipe 11 is provided with an arc-shaped transition. The outer wall size of the discharge pipe 11 matches the inner wall size of the sleeve 6. The sleeve 6 is slidably connected to the shell 4. A water inlet pipe 13 is installed on one side of the shell 4.

[0035] The pressing plate 7 and the mesh plate 8 are connected by the driving rod 3 and its auxiliary structure. When the driving rod 3 is in operation, the food is crushed. At the same time, the connecting rod group 801 has a preliminary crushing effect on large-volume food. After the liquid food is poured into the feeding device, the water flow realizes a self-cleaning effect, so that the feeding device can be used next time.

[0036] A four-way pipe 9 is installed on the end cover 5, and an air pump 2 and a control valve are installed inside the four-way pipe 9;

[0037] The four ports of the four-way pipe 9 are respectively connected to the external environment, the cavity, the air pump 2 and the space inside the housing 4;

[0038] The airflow control end of the four-way pipe 9 is connected to the air pump 2. There are two bifurcated ports in the four-way pipe 9. A constant pressure mechanism 12 and a control valve are installed inside the two bifurcated ports respectively. The two ports controlled by the constant pressure mechanism 12 are respectively connected to the air pump 2 and the external environment, and the two ports controlled by the control valve are respectively connected to the cavity and the space inside the housing 4.

[0039] The constant pressure mechanism 12 includes a main spring 1201 and a slider 1202. The slider 1202 is composed of a cylinder and cones at both ends. The main spring 1201 is installed on both sides of the cylinder. The length of the cylinder is less than the inner diameter of the four-way tube 9. The four-way tube 9 is provided with a triangular cavity at both ends. One end of the main spring 1201 is connected to the triangular cavity. The constant pressure mechanism 12 cooperates with the air pump 2 and the four-way tube 9 to evacuate air before food processing to prevent the liquid food from carrying a large amount of air into the patient's stomach during infusion, thereby causing bloating in the patient's body. At the same time, it cooperates with the pressure plate 7 to realize the liquid food infusion work, and achieves stable infusion through air pressure.

[0040] The casing 6 is sleeved with the housing 4. A discharge pipe 11 is installed in the middle of the casing 6. The discharge pipe 11 is connected to the hose 1.

[0041] Several rubber covers 101 are provided inside the end of the hose 1. The rubber covers 101 are distributed in a circle at one end of the hose 1. Several rubber covers 101 are semicircular. A rubber reed 102 is installed between the hose 1 and the rubber cover 101. The front end of the hose 1 forms a semi-closed spherical shape under the action of the rubber cover 101 and the rubber reed 102, so that when the hose 1 is inserted, the spherical surface will not cause scratches on the patient's nasal cavity wall, esophageal cavity wall and stomach wall. At the same time, it prevents the body fluids inside the patient's body from entering the hose 1 through the front end of the hose 1 during the insertion of the hose 1, so as to avoid backflow.

[0042] The working principle of the present invention is as follows: the end cover 5 above the shell 4 is opened, and the end cover 5 is separated from the shell 4 together with the pressure plate 7, the driving rod 3 and the mesh plate 8, and the food to be processed is placed in the space inside the shell 4. The end cover 5 is then reconnected to the shell 4, and the driving rod 3 between the pressure plate 7 and the mesh plate 8 is controlled to work, wherein the driving rod 3 performs reciprocating telescopic work, and the output end of the driving rod 3 drives the mesh plate 8 to perform reciprocating lifting and lowering motion, realizing continuous separation and engagement between the pressure plate 7 and the mesh plate 8, thereby achieving food crushing inside the shell 4, and the discharge pipe 11 is connected to the hose 1;

[0043] When the supply device needs to output liquid food, the supply device controls the port connected to the cavity to open, and the port connected to the external environment is closed by the constant pressure mechanism 12. At this time, the air pump 2 inputs air into the cavity through the four-way pipe 9. The cavity is formed by the end cover 5 and the pressure plate 7 in conjunction with the shell 4. The pressure plate 7 is engaged with the limiting sleeve 301. As the air volume between the end cover 5 and the pressure plate 7 rises, the pressure plate 7 descends along the outer wall of the limiting sleeve 301 and opens the valve inside the discharge pipe 11. Under the action of pressure, the liquid food inside the shell 4 is infused into the patient's stomach through the hose 1;

[0044] The slider 1202 is connected to the four-way pipe 9 through the main spring 1201. When the supply device extracts the air inside the shell 4 through the air pump 2, the air pressure inside the shell 4 drops. At this time, the upper and lower ends of the slider 1202 are respectively located in the ambient air pressure and the air pressure inside the shell 4. Under the action of the air pressure difference, the slider 1202 descends along the inner wall of the four-way pipe 9. The two ends of the main spring 1201 are respectively connected to the slider 1202 and the four-way pipe 9 for rotation. An angle deflection sensor is installed inside the rotating shaft on one side of the main spring 1201. When the slider 1202 is descending or ascending, the main spring 1201 is in tension and Deflection state: The angle deflection sensor monitors the angle state of the main spring 1201 in real time and feeds back the monitored value to the control body inside the supply device. When the slider 1202 drops to a certain length, the angle after the main spring 1201 is deflected is converted by the angle deflection sensor into a value and transmitted to the control body, indicating that most of the air inside the shell 4 has been extracted. Alternatively, when the slider 1202 rises to a certain length, the angle after the main spring 1201 is deflected is converted by the angle deflection sensor into a value and transmitted to the control body, indicating that the cavity is in the maximum expansion state and the liquid food inside the shell 4 has been discharged.

[0045] The length of the cylinder is smaller than the inner diameter of the four-way pipe 9. When most of the air inside the shell 4 is extracted, the port connected to the outside environment is connected to the port connected to the air pump 2 due to the change in the position of the slider 1202. At this time, the air pump 2 mainly extracts air from the outside environment. Until the air pump 2 stops working, the air inside the outside environment is replenished into the shell 4 through the four-way pipe 9. The air pressure inside the shell 4 changes, causing the slider 1202 to rise, and the port connected to the outside environment is closed by the slider 1202 again.

[0046] The outer side of the driving rod 3 is provided with a limiting sleeve 301, and is connected with a movable sleeve 302 and a threaded sleeve 303. The outer wall of the limiting sleeve 301 is provided with two slots. At the same time, fixed rods are installed on both sides of the output end of the driving rod 3. The driving rod 3 is connected to the movable sleeve 302 through the fixed rod. The driving rod 3 drives the threaded sleeve 303 to slide up and down along the outer wall of the limiting sleeve 301 through the movable sleeve 302. Due to the meshing connection between the threaded sleeve 303 and the limiting sleeve 301, and the threaded groove is provided on the outer wall of the limiting sleeve 301, the threaded sleeve 303 can be moved along the The outer wall of the limiting sleeve 301 rotates during the upward and downward sliding process. Since the threaded sleeve 303 is connected to the mesh plate 8, the mesh plate 8 moves synchronously with the threaded sleeve 303. The pressing plate 7 is connected to the end cover 5. When the mesh plate 8 is rising, the mesh plate 8 squeezes the food between the pressing plate 7 and the mesh plate 8. At the same time, the mesh plate 8 in the rotating state cuts the food until the food passes through the mesh and enters the bottom of the mesh plate 8 under the action of squeezing. When the mesh plate 8 is descending, the mesh plate 8 crushes the food below until the food passes through the mesh and enters the top of the mesh plate 8.

[0047] The connecting rod group 801 is used to be installed on the outside of the mesh plate 8. During the rising period of the mesh plate 8, the distance between the mesh plate 8 and the pressure plate 7 is continuously reduced. The two connecting rods fold under the action of pressure. At the same time, the connecting rod group 801 rotates synchronously with the mesh plate 8, thereby squeezing the food between the pressure plate 7 and the mesh plate 8. Large pieces of food are first crushed by several groups of connecting rod groups 801 under the pressure of the pressure plate 7 and the mesh plate 8. Then, as the space between the pressure plate 7 and the mesh plate 8 is reduced, the crushed food is crushed again through the mesh on the mesh plate 8.

[0048] During the rising period of the mesh plate 8, until the pressing plate 7 and the mesh plate 8 are in contact with each other, the connecting rod group 801 is in a folded state and stored in the groove on the mesh plate 8 to ensure that the food between the pressing plate 7 and the mesh plate 8 completely passes through the mesh, and the food above the mesh plate 8 is all squeezed to the bottom of the mesh plate 8. When the mesh plate 8 is in the descending period, the connecting rod inside the connecting rod group 801 begins to extend until the lower end surface of the mesh plate 8 is about to be in contact with the upper end surface of the sleeve shell 6. At this time, the two connecting rods inside the connecting rod group 801 are both in a vertical state, and the side walls of the connecting rods are in contact with the side walls of the shell 4. At this time, the mesh plate 8 and the connecting rod group 801 in the rotating state scrape off the food attached to the upper inner wall of the shell 4;

[0049] Before the hose 1 is connected to the discharge pipe 11, it is necessary to extend the hose 1 through the patient's nasal cavity into the patient's stomach, so that the feeding device can input the crushed liquid food into the patient's stomach through the hose 1. During the extension process of the hose 1, the rubber cover 101 at the front end of the hose 1 is in a gathered state under the action of the rubber reed 102. The rubber covers 101 in the gathered state form a semicircular rubber cap at the front end of the hose 1. The outer diameter and inner diameter of the rubber cap are respectively the same as the outer diameter and inner diameter of the hose 1. Since the front end of the hose 1 is in the rubber cover 101 The semi-closed spherical shape is formed by the action of the rubber reed 102, so that during the insertion process of the hose 1, the spherical surface will not cause scratches on the patient's nasal cavity wall, esophageal cavity wall and stomach wall. At the same time, it prevents the body fluids in the patient's body from entering the hose 1 through the front end of the hose 1 during the insertion of the hose 1. During the subsequent injection of liquid food, the supply device uses pressure to infuse the liquid food into the hose 1 and finally outputs it to the patient's stomach. In addition, during the subsequent insertion of the hose 1 into the patient's body, gastric fluid will not flow back through the hose 1 due to the patient's body posture.

[0050] Before the supply device processes the food, it is necessary to extract the air inside the shell 4 to prevent the air inside the supply device and the air carried by the food from being output to the patient's stomach during the infusion process of the liquid food. Four ports are provided on the four-way tube 9, and two forks appear when the four ports are connected. Two of the four ports are connected to the air pump 2 and the internal space of the shell 4, and the two ports connected to the control valve are respectively located in the internal space of the shell 4 and in the cavity. When the air pump 2 is extracting the air inside the shell 4, the supply device controls the port connected to the cavity to be closed. The two ports connected to the internal space of the shell 4 and the air pump 2 are connected, and the port connected to the external environment is closed by the constant pressure mechanism 12. Then, the air pump 2 is driven to extract the air inside the shell 4. As the air inside the shell 4 is continuously extracted, the air pressure inside the shell 4 decreases. At this time, the constant pressure mechanism 12 changes its closed state. At this time, the port connected to the external environment is opened, and the external air is extracted through the air pump 2. After the state of the constant pressure mechanism 12 changes, the supply device controls the air pump 2 to stop working. At this time, most of the air inside the shell 4 is extracted.

[0051] After the supply equipment completes the perfusion, the discharge pipe 11 and the hose 1 are separated, and the air inside the cavity of the air pump 2 is used to reduce the size of the cavity to a minimum. At this time, the upper end surface of the pressure plate 7 is in contact with the lower end surface of the end cover 5. After the water inlet pipe 13 is connected to the water pipe, water is injected into the shell 4. At the same time, the shell 4 and the sleeve 6 are separated to the maximum extent through the air pressure difference. Since the end cover 5 is connected to the discharge pipe 11 through the limit sleeve 301, the separated sleeve 6 is synchronously separated from the discharge pipe 11. The drive rod 3 is started again to move in a reciprocating lifting manner. The drive rod 3 drives the mesh plate 8 and the connecting rod group 801 to realize the cleaning of the internal structure of the shell 4, and the water leaving the shell 4 can pass through the inner and outer sides of the discharge pipe 11 to complete the cleaning of the discharge pipe 11.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A nasogastric feeding device for digestive tract care with anti-backflow function, characterized by: The invention comprises a supply device and a hose (1), wherein the supply device comprises a driving rod (3) and a shell (4), wherein end covers (5) and a sleeve (6) are respectively installed at the upper and lower ends of the shell (4), a pressure plate (7) and a mesh plate (8) are installed inside the shell (4), a cavity exists between the end cover (5) and the sleeve (6), a four-way pipe (9) is installed on the end cover (5), an air pump (2) and a control valve are installed inside the four-way pipe (9), and the driving rod (3) is installed on the pressure plate (7) and the mesh plate (8); The four ports of the four-way pipe (9) are respectively connected to the external environment, the cavity, the air pump (2) and the space inside the housing (4); The casing (6) is sleeved with the housing (4), a discharge pipe (11) is installed in the middle of the casing (6), and the discharge pipe (11) is connected to the hose (1); The outer side of the driving rod (3) is sleeved with a limiting sleeve (301), the outer wall of the limiting sleeve (301) is provided with a threaded groove, the lower end of the driving rod (3) is provided with a movable sleeve (302) and a threaded sleeve (303), the driving rod (3) is connected to the mesh plate (8) via the movable sleeve (302) and the threaded sleeve (303), and the threaded sleeve (303) is engaged with the limiting sleeve (301); The driving rod (3) between the pressing plate (7) and the mesh plate (8) is controlled to operate, wherein the driving rod (3) performs reciprocating telescopic operation, and the output end of the driving rod (3) drives the mesh plate (8) to perform reciprocating lifting and lowering motion, thereby achieving continuous separation and engagement between the pressing plate (7) and the mesh plate (8), thereby achieving food crushing inside the shell (4).

2. The nasogastric feeding device for digestive tract nursing with anti-backflow function according to claim 1, characterized in that: Several groups of connecting rod groups (801) are installed on the outside of the mesh plate (8), and the connecting rod group (801) consists of two connecting rods and two spring shafts. The connecting rods and the spring shafts are alternately connected, and the lower end of the connecting rod group (801) is rotatably connected to the mesh plate (8) through the spring shaft.

3. The nasogastric feeding device for digestive tract nursing with anti-backflow function according to claim 2, characterized in that: The upper end surface of the connecting rod group (801) is in contact with the lower end surface of the pressure plate (7), and one side surface of the connecting rod group (801) coincides with the outer wall of the mesh plate (8). The outer diameter of the mesh plate (8) is the same as the inner diameter of the shell (4). The mesh plate (8) is provided with a groove that matches the size of the outer wall of the connecting rod group (801).

4. The nasogastric feeding device for digestive tract nursing with anti-backflow function according to claim 3, characterized in that: The limiting sleeve (301) passes through the mesh plate (8) and is connected to the discharge pipe (11). The outer wall of the discharge pipe (11) is provided with an arc-shaped transition. The outer wall size of the discharge pipe (11) matches the inner wall size of the sleeve (6). The sleeve (6) is slidably connected to the shell (4). A water inlet pipe (13) is installed on one side of the shell (4).

5. The nasogastric feeding device for digestive tract care with anti-reflux function according to claim 1, characterized in that: A plurality of rubber covers (101) are provided inside the end of the hose (1), the rubber covers (101) are distributed circumferentially at one end of the hose (1), and the plurality of rubber covers (101) are semicircular. A rubber reed (102) is installed between the hose (1) and the rubber cover (101).

6. The nasogastric feeding device for digestive tract care with anti-reflux function according to claim 1, characterized in that: The airflow control end of the four-way pipe (9) is connected to the air pump (2), and there are two bifurcated openings in the four-way pipe (9). A constant pressure mechanism (12) and a control valve are respectively installed inside the two bifurcated openings. The two ports controlled by the constant pressure mechanism (12) are respectively connected to the air pump (2) and the external environment, and the two ports controlled by the control valve are respectively connected to the cavity and the space inside the shell (4).

7. The nasogastric feeding device for digestive tract nursing with anti-backflow function according to claim 6, characterized in that: The constant pressure mechanism (12) comprises a main spring (1201) and a slider (1202), wherein the slider (1202) is composed of a cylinder and cones at both ends, and the main spring (1201) is installed on both sides of the cylinder, wherein the length of the cylinder is less than the inner diameter of the four-way tube (9), and triangular cavities are provided at both ends of the four-way tube (9), and one end of the main spring (1201) is connected to the triangular cavity.

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