Pipe punching and sealing device

Abstract

The invention belongs to the technical field of medical auxiliary instruments and discloses a tube flushing and sealing device which comprises a liquid storage component and an extrusion assembly, the liquid storage component is used for storing liquid for flushing and sealing a tube, and the extrusion assembly is used for driving the liquid to flow to a venous catheter from the liquid storage component. The extrusion assembly comprises a hose, and the two ends of the hose are used for communicating with the liquid storage component and the extrusion assembly correspondingly. Liquid in the liquid storage component is conveyed to the venous catheter along the hose through the extrusion assembly so as to flush and seal the catheter. The operation of flushing and sealing the catheter is simpler, more convenient and faster, and the risk that the venous catheter is polluted is reduced. The shell is provided with an inner cavity, and the moving part is at least partially arranged in the inner cavity and slidably connected with the shell. The shell is provided with a liquid inlet connector and a liquid outlet connector, and the liquid inlet connector and the liquid outlet connector are provided with a first one-way valve and a second one-way valve respectively. A user operates the moving part to move in the first direction or the second direction, pipe punching and sealing can be completed, and the threshold of pipe punching and sealing operation is lowered.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary device technology, specifically relating to a tube sealing device. Background Technology

[0002] In clinical practice, administering medications via intravenous catheters is a common technique. For patients requiring prolonged intravenous infusions, a catheter is typically worn for extended periods and kept connected to the blood vessels. During the intervals between infusions, the catheter cannot maintain a consistently positive pressure relative to the body's blood pressure, making it susceptible to blood backflow and blockage. To ensure continued and smooth intravenous infusion, a flushing and sealing procedure is necessary. This involves flushing and sealing. Flushing involves injecting fluid into the catheter to remove residual medication, blood clots, or other obstructions, restoring patency. Sealing, on the other hand, involves injecting a certain amount of fluid into the catheter after the infusion has stopped and clamping the catheter clamp, creating a fluid seal to prevent blood backflow.

[0003] Current flushing and sealing procedures typically require multiple aspirations of fluid using a standard syringe and injection into the intravenous catheter. After each syringe insertion and withdrawal, the catheter connector must be disinfected before resuming aspiration, air removal, and dosage verification. Furthermore, repeatedly disconnecting the infusion line from the catheter and reconnecting the syringe increases the time the catheter interface is exposed to air, raising the risk of contamination. Moreover, standard flushing and sealing procedures require highly skilled operators. Generally, only specially trained healthcare personnel can correctly use syringes for flushing or sealing. All patients must undergo flushing and sealing under the supervision of healthcare professionals; the frequent procedures place a significant workload on medical staff and are inconvenient for patients. Summary of the Invention

[0004] To achieve the above objectives, the present invention discloses a sealing tube flushing device, comprising: A liquid storage component is configured to store liquid for flushing the sealing tube; A compression assembly includes a housing, a movable component, and a hose; the housing has an inner cavity, the movable component is at least partially located in the inner cavity and slidably connected to the housing; the housing has an inlet connector and an outlet connector communicating with the inner cavity, the inlet connector is connected to one end of the hose, the other end of the hose is connected to a liquid storage component, and the outlet connector is used to connect to a venous catheter communicating with a human blood vessel; the inlet connector has a first one-way valve configured to allow liquid to flow unidirectionally into the inner cavity; the outlet connector has a second one-way valve configured to allow liquid to flow unidirectionally into the venous catheter; When the moving part moves relative to the outer shell along a first preset direction, the liquid in the liquid storage component flows into the inner cavity through the first one-way valve; when the moving part moves relative to the outer shell along a second preset direction, the liquid inside the inner cavity flows to the venous catheter through the second one-way valve, wherein the first preset direction and the second preset direction are opposite to each other.

[0005] As an optional implementation, the inner cavity includes a positioning cavity and a solution cavity, the moving member is slidably connected to the positioning cavity, and the solution cavity is provided with the inlet connector and the outlet connector; the extrusion assembly also includes an elastic bladder, the elastic bladder is disposed in the positioning cavity, one side of the elastic bladder communicates with the solution cavity, and the other side abuts against the moving member; When the movable member moves relative to the inner cavity along the first preset direction, the movable member moves away from the elastic bladder, causing the liquid in the reservoir to flow into the solution cavity; when the movable member moves relative to the inner cavity along the second preset direction, the movable member squeezes the elastic bladder, causing the liquid inside the solution cavity to flow into the venous catheter.

[0006] As an optional implementation, the movable component includes a button, the outer wall of which is provided with a guide strip, the guide strip being parallel to the first preset direction; the inner wall of the positioning cavity is provided with a guide groove corresponding to the position of the guide strip, and the guide strip is disposed in the guide groove; When the button moves to the first position along the first preset direction, one end of the guide strip abuts against the inner wall of the guide groove to restrict the button from moving further. When the button moves to the second position along the second preset direction, the other end of the guide bar abuts against the bottom wall of the positioning cavity to restrict the button from moving further.

[0007] As an optional implementation, the moving part includes a piston rod, which includes a rod portion and a piston head; one end of the rod portion is located outside the inner cavity, and the other end is fixed to the piston head; the piston head is in contact with the inner wall of the inner cavity.

[0008] As an optional implementation, the housing includes a positioning chamber configured to house the liquid storage component, and the positioning chamber has an openable and closable side cover; when the side cover is closed, the liquid storage component is fixed relative to the extrusion assembly; when the side cover is opened, the liquid storage component can be separated from the extrusion assembly.

[0009] As an optional implementation, the liquid storage component is provided with a silicone valve at one end near the hose, and a first connector is provided at the end of the hose away from the liquid inlet connector; the first connector can be connected to the liquid storage component, and when the first connector is connected to the liquid storage component, a portion of the first connector passes through the silicone valve, so that the liquid storage component is in communication with the hose.

[0010] As an optional implementation, the flushing and sealing device further includes a liquid distribution assembly, which includes a second connector, a third connector, and a fourth connector; the second connector is used to connect to an external liquid source, the third connector is used to connect to the liquid outlet connector, and the fourth connector is used to connect to the intravenous catheter; the liquid distribution assembly is configured to control the opening and closing of the liquid delivery path between the second connector and the fourth connector or the opening and closing of the liquid delivery path between the third connector and the fourth connector.

[0011] As an optional implementation, the liquid separation assembly includes a three-way valve, which is connected to the second connector, the third connector, and the fourth connector; the three-way valve is equipped with a switch, which, when rotated, connects the second connector to the fourth connector or the third connector to the fourth connector.

[0012] As an optional implementation, the liquid distribution assembly includes a branch pipe, which includes a main pipe and a branch pipe; the two ends of the main pipe are respectively connected to the second connector and the fourth connector, one end of the branch pipe is connected to the third connector, and the other end is connected to the main pipe; the branch pipe is provided with a first pipe clamp, and the main pipe is provided with a second pipe clamp on the side near the second connector.

[0013] As an optional implementation, the flushing tube device further includes a detection mechanism; the detection mechanism includes a housing that communicates with the venous catheter; the outer wall of the housing is provided with a plurality of scale values, the scale values ​​being used to indicate the hydraulic pressure value inside the housing, and / or the scale values ​​being used to indicate the liquid volume value inside the housing.

[0014] As an optional implementation, a first piston is provided inside the housing, and a first elastic member is provided between the first piston and the bottom wall of the housing, with the two ends of the first elastic member abutting against the bottom wall of the housing and the first piston, respectively.

[0015] As an optional implementation, an elastic membrane is provided inside the housing on the side near the venous catheter. When liquid from the tubing enters the housing, the liquid causes the elastic membrane to gradually expand.

[0016] As an optional implementation, the housing is provided with a groove, and the outer wall of the housing is provided with the scale value along the length direction of the groove; a second piston is provided inside the housing near the venous catheter, and a second elastic element is provided between the second piston and the bottom wall of the housing; an indicator rod is provided on the side of the second piston away from the venous catheter, and the side of the indicator rod away from the second piston is slidably connected to the groove, and an indicator part is provided at the end of the indicator rod near the groove, the indicator part being used to indicate the corresponding scale value.

[0017] As an optional implementation, the hose includes an outer hose and an inner hose; the outer hose is located outside the housing and its two ends are respectively connected to the liquid inlet connector and the liquid storage component; the inner hose is located inside the inner cavity and its two ends are respectively connected to the liquid inlet connector and the liquid outlet connector, and the inner hose abuts against the moving part; When the movable component moves relative to the outer casing along a first preset direction, the movable component moves away from the inner hose, and liquid enters the inner hose from the outer hose through the inlet connector; when the movable component moves relative to the outer casing along a second preset direction, the movable component squeezes the inner hose, and liquid flows from the inner hose through the outlet connector to the venous catheter.

[0018] As an optional implementation, the liquid storage component includes a liquid storage tube, and a third piston is provided inside the liquid storage tube; when the liquid in the liquid storage tube flows to the hose, the third piston moves toward the hose under the action of atmospheric pressure.

[0019] As an alternative implementation, the end face of the liquid storage tube away from the flexible tube is provided with a breathable membrane; the breathable membrane is configured to be breathable and block pathogens.

[0020] As an optional implementation, the liquid storage component includes a solution bag; when the liquid in the solution bag flows to the hose, the solution bag shrinks in volume under atmospheric pressure.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The two ends of the tubing are used to connect the reservoir and the squeezing assembly, respectively. The squeezing assembly delivers the liquid in the reservoir along the tubing to the intravenous catheter for flushing and sealing. This eliminates the need for steps such as air release, injection, disinfection, and liquid aspiration, making the flushing and sealing operation simpler and faster. At the same time, it eliminates the need to frequently disconnect the intravenous catheter's infusion line, reducing the risk of contamination of the intravenous catheter.

[0022] (2) The compression assembly includes a housing and a movable component. The housing has an inner cavity, and the movable component is at least partially located in the inner cavity and slidably connected to the housing. The housing has an inlet connector and an outlet connector, and the inlet connector and the outlet connector are respectively equipped with a first check valve and a second check valve. By operating the movable component to move along the first direction or the second direction, the user can make the liquid flow from the reservoir component into the tubing, the inner cavity and the intravenous catheter in sequence to flush and seal the catheter, which lowers the threshold for flushing and sealing the catheter and effectively alleviates the problem of medical resource shortage. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a first assembled perspective view of the liquid storage component, the extrusion assembly, and the hose of the present invention; Figure 2 This is a first assembled exploded view of the liquid storage component, extrusion assembly, and hose of the present invention; Figure 3 This is a cross-sectional view of the extrusion assembly of the present invention; Figure 4 This is a first assembled cross-sectional view of the liquid storage component, the extrusion assembly, and the hose of the present invention; Figure 5 yes Figure 4 Enlarged view of point A in the middle; Figure 6 yes Figure 4 Enlarged view of point B in the middle; Figure 7 This is a cross-sectional view of the extrusion assembly of the present invention; Figure 8 This is a cross-sectional view of another embodiment of the extrusion assembly of the present invention; Figure 9 This is a second assembled perspective view of the liquid storage component, the extrusion assembly, and the hose of the present invention; Figure 10 This is a second assembly cross-sectional view of the liquid storage component, the extrusion assembly, and the hose of the present invention; Figure 11 yes Figure 10 Enlarged view of point C in the middle; Figure 12 This is the first structural diagram of the invention. Figure 13 This is the second structural diagram of the present invention; Figure 14This is a thumbnail diagram of the detection mechanism and intravenous catheter of the present invention; Figure 15 This is a cross-sectional view of the first embodiment of the testing mechanism of the present invention; Figure 16 This is a cross-sectional view of the second embodiment of the testing mechanism of the present invention; Figure 17 This is a structural diagram of the third embodiment of the testing mechanism of the present invention; Figure 18 This is a cross-sectional view of the third embodiment of the testing mechanism of the present invention; Figure 19 This is a third assembly drawing of the liquid storage component, the extrusion assembly, and the hose of the present invention; Figure 20 This is a cross-sectional view of the extrusion assembly of the present invention; Figure 21 This is a cross-sectional view of another embodiment of the extrusion assembly of the present invention.

[0025] Explanation of key figure labels: 1. Liquid storage component; 11. Silicone valve; 12. Liquid storage tube; 121. Third piston; 122. Gas-permeable membrane; 13. Solution bag; 2. Extrusion assembly; 21. Outer shell; 211. Inner cavity; 2111. Positioning cavity; 2112. Solution cavity; 212. Inlet connector; 2121. First check valve; 213. Outlet connector; 2131. Second check valve; 214. Positioning chamber; 2141. Side cover; 215. Movable shell; 216. Fixed shell; 22. Moving part; 221. Button; 2211. Guide bar; 2212. Guide groove; 222. Piston rod; 2221. Rod part; 2222. Piston head; 23. Hose; 231. First connector; 232. Outer hose; 233. Inner hose; 2331. Thick tube; 2332. Thin tube; 24. Elastic capsule; 241. Elastomer; 3. Watch strap; 4. Intravenous catheter; 41. Connecting tube; 411. Fifth connector; 42. Catheter body; 5. Testing institutions; 51. Housing; 511. Scale value; 512. Slide groove; 52. First piston; 521. First elastic element; 53. Elastic membrane; 54. Second piston; 541. Second elastic element; 55. Indicator rod; 551. Indicator section; 6. Separating assembly; 61. Second connector; 62. Third connector; 63. Fourth connector; 64. Three-way valve; 641. Switch; 65. Branch pipe; 651. Main pipe; 6511. Second pipe clamp; 652, branch pipe; 6521, first pipe clamp; D1, First preset direction; D2, Second preset direction; Detailed Implementation The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to include a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, some of the aforementioned terms, besides indicating direction or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0030] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0031] Please see Figures 1-3 As shown in the figure, this application provides a flushing and sealing device, including a liquid storage component 1 and a squeezing assembly 2. The liquid storage component 1 is configured to store liquid for flushing and sealing the tube, and the squeezing assembly 2 is used to drive the liquid in the liquid storage component 1 to flow to the intravenous catheter 4 to perform the flushing and sealing operation.

[0032] The compression assembly 2 includes a housing 21, a movable component 22, and a hose 23. The housing 21 has an inner cavity 211, and the movable component 22 is at least partially located in the inner cavity 211 and slidably connected to the housing 21. The housing 21 has an inlet connector 212 and an outlet connector 213 communicating with the inner cavity 211. The inlet connector 212 is connected to one end of the hose 23, and the other end of the hose 23 is connected to the liquid storage component 1. The outlet connector 213 is used to connect to a venous catheter 4 connected to a human blood vessel. The inlet connector 212 has a first one-way valve 2121, which is configured to allow liquid to flow unidirectionally into the inner cavity 211. The outlet connector 213 has a second one-way valve 2131, which is configured to allow liquid to flow unidirectionally into the venous catheter 4.

[0033] The two ends of the tubing 23 are used to connect the reservoir 1 and the squeezing assembly 2, respectively. The squeezing assembly 2 delivers the liquid in the reservoir 1 along the tubing 23 to the intravenous catheter 4 for flushing and sealing. This eliminates the need for steps such as air release, injection, disinfection, and liquid aspiration, making the flushing and sealing operation simpler and faster. At the same time, it eliminates the need to frequently disconnect the infusion line of the intravenous catheter 4, reducing the risk of contamination of the intravenous catheter 4.

[0034] When the moving part 22 moves relative to the outer shell 21 along the first preset direction D1, the liquid in the liquid storage component 1 flows into the inner cavity 211 through the first one-way valve 2121; when the moving part 22 moves relative to the outer shell 21 along the second preset direction D2, the liquid inside the inner cavity 211 flows to the intravenous catheter 4 through the second one-way valve 2131, wherein the first preset direction D1 and the second preset direction D2 are opposite to each other.

[0035] When the movable component 22 moves along the first preset direction D1 within the inner cavity 211 of the outer casing 21, the volume of the inner cavity 211 increases and the pressure decreases, creating a negative pressure. The liquid in the liquid storage component 1 is drawn into the hose 23 and enters the inner cavity 211 through the inlet connector 212. At this time, the first one-way valve 2121 opens, and the liquid flows smoothly into the inner cavity 211. When the movable component 22 moves along the second preset direction D2 within the inner cavity 211 of the outer casing 21, the volume of the inner cavity 211 decreases and the pressure increases, creating a positive pressure. The liquid in the inner cavity 211 is discharged towards the outlet connector 213. At this time, the second one-way valve 2131 opens, and the liquid flows towards the intravenous catheter 4.

[0036] The first one-way valve 2121 ensures that liquid can only enter the inner cavity 211 from the liquid storage component 1, preventing liquid backflow and achieving controllable liquid aspiration; the second one-way valve 2131 ensures that liquid can only enter the intravenous catheter 4 from the inner cavity 211, preventing blood or body fluid backflow and achieving safe catheter sealing and flushing.

[0037] By operating the movable component 22 to move along the first or second direction, the user can make the liquid flow from the liquid storage component 1 into the tubing 23, the lumen 211 and the intravenous catheter 4 in sequence to flush and seal the tube, which lowers the threshold of the flushing and sealing operation and effectively alleviates the problem of medical resource shortage.

[0038] In some embodiments, the outer wall of the housing 21 is provided with a scale for indicating the displacement of the moving part 22, which is beneficial to more accurately control the position of the moving part 22 so as to achieve more precise absorption of liquid from the liquid storage component 1 into the inner cavity 211.

[0039] Please see Figures 2-7 As shown, in some embodiments, the inner cavity 211 includes a positioning cavity 2111 and a solution cavity 2112. The moving member 22 is slidably connected to the positioning cavity 2111. The solution cavity 2112 is provided with an inlet connector 212 and an outlet connector 213. The extrusion assembly 2 also includes an elastic bladder 24, which is disposed in the positioning cavity 2111. One side of the elastic bladder 24 communicates with the solution cavity 2112, and the other side abuts against the moving member 22.

[0040] When the moving part 22 moves relative to the inner cavity 211 along the first preset direction D1, the moving part 22 moves away from the elastic bladder 24, causing the liquid in the liquid storage component 1 to flow into the solution cavity 2112; when the moving part 22 moves relative to the inner cavity 211 along the second preset direction D2, the moving part 22 squeezes the elastic bladder 24, causing the liquid inside the solution cavity 2112 to flow into the venous catheter 4.

[0041] The moving part 22 does not directly contact the liquid in the solution chamber 2112. Instead, it converts mechanical displacement into pressure changes in the solution chamber 2112 through the elastic deformation of the elastic bladder 24. The compressibility and elasticity of the elastic bladder 24 ensure smooth pressure changes. The elastic bladder 24 itself can be made of medical-grade elastic material, possessing good sealing and fatigue resistance. The positioning chamber 2111 is responsible for guidance and displacement transmission, while the solution chamber 2112 is responsible for storing and transporting the liquid.

[0042] During catheter sealing, pressing the movable part 22 allows a fixed amount of fluid to be injected into the intravenous catheter 4, ensuring that the hydraulic pressure in the intravenous catheter 4 is positive relative to the body's blood pressure, thus preventing blood backflow into the intravenous catheter 4 during the intervals between intravenous infusions. During flushing, the intensity and frequency of flushing can be controlled by manually adjusting the frequency and force of pressing the movable part 22 to flush and clear the inside of the intravenous catheter 4.

[0043] See Figure 7 As shown, in some embodiments, an elastic body 241 is provided inside the elastic bladder 24. The elastic body 241 used here generally refers to a spring or other component with good elasticity that does not affect the communication between the elastic bladder 24 and the solution cavity 2112. The two ends of the elastic body 241 abut against the bottom wall of the elastic bladder 24 and the positioning cavity 2111, respectively.

[0044] The elastic bladder 24 itself has a certain elastic deformation capability, but the internal elastic body 241 provides it with additional elastic recovery force, so that the elastic bladder 24 can quickly recover when the moving part 22 is not pressed by external force, so as to absorb the liquid in the liquid storage component 1 into the inner cavity 211. At the same time, it is convenient for the operator to quickly press the moving part 22 again, so that the operator can adjust the frequency of pressing the moving part 22.

[0045] When the movable component 22 moves along the first preset direction D1, it moves away from the elastic bladder 24, causing the elastic bladder 24 to expand and the elastic body 241 to be stretched. At this time, the pressure in the inner cavity 211 decreases, and liquid flows from the reservoir component 1 into the inner cavity 211. When the movable component 22 approaches and squeezes the elastic bladder 24 along the second preset direction D2, the elastic bladder 24 contracts and the elastic body 241 is compressed. The elastic body 241 stores elastic potential energy, the pressure in the inner cavity 211 increases, and liquid flows from the inner cavity 211 into the intravenous catheter 4. When the external force applied to the movable component 22 is removed, the elastic body 241 and the elastic bladder 24 regain their elasticity, causing the elastic bladder 24 to re-inflate.

[0046] See Figure 8 As shown, in some embodiments, the outer casing 21 includes a movable casing 215 and a fixed casing 216, with the movable casing 215 fitted over the button 221. The outer side wall of the movable casing 215 is threadedly connected to the inner side wall of the fixed casing 216. When the movable casing 215 rotates relative to the fixed casing 216, the movable casing 215 moves relative to the fixed casing 216 along a first preset direction D1 or a second preset direction D2, thereby adjusting the maximum stroke of the button 221 in the positioning cavity 2111.

[0047] When the movable shell 215 moves a certain distance relative to the fixed shell 216 along the first preset direction D1, the maximum stroke of the button 221 increases, and the volume of the compressible elastic bladder of the button 221 also increases. At this time, pressing the button 221 and squeezing the elastic bladder results in a larger volume of solution drawn into the inner cavity 211 from the reservoir component 1 or discharged from the inner cavity 211 into the intravenous catheter 4. When the movable shell 215 moves a certain distance relative to the fixed shell 216 along the second preset direction D2, the maximum stroke of the button 221 decreases, and the volume of the compressible elastic bladder of the button 221 also decreases. At this time, pressing the button 221 and squeezing the elastic bladder results in a smaller volume of solution drawn into the inner cavity 211 from the reservoir component 1 or discharged from the inner cavity 211 into the intravenous catheter 4. Under the elastic pressure of the elastic bladder, the button 221 remains in contact with the movable shell 215. The operator can adjust the relative position of the movable shell 215 and the fixed shell 216 according to actual needs, so that the amount of liquid used for flushing the tube each time can meet the needs of different situations.

[0048] In some embodiments, the movable shell 215 and the fixed shell 216 are provided with limiting portions in the circumferential direction. The limiting portions are not threaded, which can prevent the movable shell 215 from being excessively rotated and disengaging from the fixed shell 216. The movable shell 215 is provided with displacement scale lines, which can intuitively indicate the depth to which the movable shell 215 is screwed into the fixed shell 216, making it convenient for the user to quantify the solution output of the extrusion assembly 2.

[0049] Please see Figure 3 As shown, in some embodiments, the movable component 22 includes a button 221, and the outer wall of the button 221 is provided with a guide strip 2211, which is parallel to a first preset direction D1. The inner wall of the positioning cavity 2111 is provided with a guide groove 2212 corresponding to the position of the guide strip 2211, and the guide strip 2211 is disposed in the guide groove 2212.

[0050] The cooperation between the guide bar 2211 and the guide groove 2212 constrains the sliding of the button 221 to a single axis direction, preventing skewness, jamming, or rotation, and ensuring the precise movement trajectory of the moving part 22. The embedded cooperation between the guide bar 2211 and the guide groove 2212 occupies little space, contributing to the miniaturization of the device. The linear movement of the button 221 ensures the consistency of each push-pull action, making the volume of liquid sucked in or pushed out repeatable and predictable, which is beneficial for achieving a good flushing and sealing effect.

[0051] When button 221 moves to the first position along the first preset direction D1, one end of guide bar 2211 abuts against the inner wall of guide groove 2212 to restrict button 221 from continuing to move and prevent button 221 from detaching from housing 21; when button 221 moves to the second position along the second preset direction D2, the other end of guide bar 2211 abuts against the bottom wall of positioning cavity 2111 to restrict button 221 from continuing to move and prevent excessive compression of elastic bladder 24.

[0052] The mechanical stop of the guide strip 2211 by the inner wall of the guide groove 2212 and the bottom wall of the positioning cavity 2111 limits the maximum range of movement of the button 221, thereby limiting the maximum compression and expansion of the elastic bladder 24. By controlling the stroke of the button 221, the volume change of the solution cavity 2112 is controlled, thereby controlling the volume of liquid drawn in or pushed out, and realizing quantitative flushing of the tube.

[0053] Please see Figures 9 to 11 As shown, in some embodiments, the movable member 22 includes a piston rod 222, which includes a rod portion 2221 and a piston head 2222. One end of the rod portion 2221 is located outside the inner cavity 211, and the other end is fixed to the piston head 2222. The piston head 2222 is in contact with the inner wall of the inner cavity 211.

[0054] When the manual operating lever 2221 moves the piston head 2222 along the first preset direction D1, the volume of the inner cavity 211 increases, the pressure decreases, and a negative pressure is formed. The liquid in the liquid storage component 1 is sequentially drawn into the inner cavity 211 through the inlet connector 212 and the first one-way valve 2121. When the lever 2221 moves the piston head 2222 along the second preset direction D2, the volume of the inner cavity 211 decreases, the pressure increases, and the liquid in the inner cavity 211 is sequentially forced into the intravenous catheter 4 through the outlet connector 213 and the second one-way valve 2131 to achieve flushing or sealing of the catheter. The fit between the piston head 2222 and the inner wall of the inner cavity 211 forms a sliding seal to prevent liquid from flowing or leaking between the piston sides.

[0055] In some embodiments, the housing 21 is provided with straps 3 on opposite sides, the straps 3 being configured to make the entire stamping tube device easy for the human body to wear.

[0056] The strap 3 wraps around the corresponding part of the body and tightens using buckles, Velcro, snaps, etc., to stably attach the flushing and sealing device to the body surface. Utilizing the body's own weight to support the device frees up the hands. The flushing and sealing device will not easily shake or fall off during daily activities, walking, sitting, or lying down. Once the flushing and sealing device is secured, the relative positions of the tubing 23, intravenous catheter 4, and reservoir 1 remain stable, preventing loosening of the interfaces, fluid leakage, or catheter dislodgement due to shaking or pulling.

[0057] Patients with intravenous catheters for extended periods often require continuous use of flushing and sealing devices. The strap design allows patients to wear the device while moving, eliminating the need to hold it constantly or place it on a fixed surface, significantly improving patient comfort.

[0058] In some embodiments, the venous catheter 4 includes a connecting tube 41 and a catheter body 42. The catheter body 42 is actually inserted into a human blood vessel. One end of the connecting tube 41 is connected to the outlet connector 213, and the other end is provided with a fifth connector 411, which is used to connect to the catheter body 42.

[0059] The connecting tube 41 connects the flushing and sealing device to the catheter body 42 on the patient's body, and its length can be adjusted according to the patient's position and activity needs. The fifth connector 411 serves as the connection point between the connecting tube 41 and the catheter body 42, allowing for quick assembly and disassembly while maintaining the sterility and tightness of the fluid pathway.

[0060] Please see Figure 2 As shown, in some embodiments, the outer casing 21 includes a positioning chamber 214, which is configured to house the liquid storage component 1. The positioning chamber 214 is provided with an openable and closable side cover 2141. When the side cover 2141 is closed, the liquid storage component 1 is fixed relative to the squeezing assembly 2; when the side cover 2141 is opened, the liquid storage component 1 can be separated from the squeezing assembly 2.

[0061] Positioning chamber 214 is specifically designed to house the liquid storage component 1. When the side cover 2141 is closed, the liquid storage component 1 and the extrusion assembly 2 are fixed together, forming a stable and unified working system. When the side cover 2141 is opened, the liquid storage component 1 can be removed from the extrusion assembly 2 for replacement or replenishment of the liquid used for flushing the sealing tube. During normal use, the side cover 2141 is closed, and the entire working system is in a closed state, reducing the risk of contamination. When maintenance or liquid replacement is required, the liquid storage component 1 can be quickly disassembled and reassembled by opening the side cover 2141 without damaging other structures.

[0062] Please see Figure 11 As shown, in some embodiments, the liquid storage component 1 is provided with a silicone valve 11 at one end near the hose 23, and the hose 23 is provided with a first connector 231 at the end away from the inlet connector 212. The first connector 231 can be connected to the liquid storage component 1. When the first connector 231 is connected to the liquid storage component 1, a portion of the first connector 231 passes through the silicone valve 11, so that the liquid storage component 1 is connected to the hose 23.

[0063] The silicone valve 11 is made of soft and elastic medical silicone. In its natural state, it is closed, blocking liquid or air from passing through the silicone valve 11. When the first connector 231 is not inserted, the silicone valve 11 is closed by its own elasticity. After the first connector 231 is inserted, it is stretched open to form a passage. When it is pulled out, it automatically springs back to close, preventing liquid leakage or external contamination from entering the liquid storage component 1.

[0064] The insertion of the liquid storage component 1 into the first connector 231 via the silicone valve 11 can be performed under aseptic conditions, and the silicone valve 11 prevents the outlet port of the liquid storage component 1 from being exposed. Repeated insertion and removal of the first connector 231 maintains the self-sealing of the outlet port of the liquid storage component 1, effectively reducing the risk of contamination. After the tubing 23 is connected to the liquid storage component 1 via the first connector 231, the liquid can smoothly enter the system during the suction process of the squeezing assembly 2, and the liquid will not flow back into the liquid storage component 1 during injection.

[0065] The silicone valve 11 makes the replacement of the liquid reservoir 1 hygienic and safe. After the first connector 231 is pulled out, its silicone valve 11 automatically closes. Reinserting the first connector 231 connects the liquid reservoir 1 and the hose 23. Users do not need to master complicated connection and sealing techniques; simply inserting the first connector 231 in the specified direction is sufficient to connect the liquid reservoir 1 and the hose 23. This reduces liquid leakage or contamination caused by improper operation.

[0066] Please see Figures 12-13 As shown, in some embodiments, the flushing and sealing device further includes a liquid dispensing assembly 6, which includes a second connector 61, a third connector 62, and a fourth connector 63. The second connector 61 is used to connect to an external liquid source, the third connector 62 is used to connect to the liquid outlet connector 213, and the fourth connector 63 is used to connect to the intravenous catheter 4. The liquid dispensing assembly 6 is configured to control the opening and closing of the liquid delivery path between the second connector 61 and the fourth connector 63, or the opening and closing of the liquid delivery path between the third connector 62 and the fourth connector 63.

[0067] Traditional intravenous infusion procedures require disconnecting the flushing and sealing equipment, replacing the infusion stand and bag, and then re-sterilizing and reconnecting. This process is cumbersome and carries a risk of infection.

[0068] When an external fluid source is needed, it is directly connected to the second connector 61. The dispensing assembly 6 then connects the second connector 61 to the fourth connector 63, allowing the external fluid to flow directly from the external fluid source to the intravenous catheter 4. If intermittent infusion is required and a flushing / sealing procedure is needed, the dispensing assembly 6 is operated to close the second connector 61 and the fourth connector 63, while the third connector 62 connects to the fourth connector 63. This allows for seamless switching between routine intravenous infusion therapy and flushing / sealing procedures without any additional physical tubing insertion or replacement, reducing the risk of tubing contamination. Integrating two different operational purposes onto the same device significantly improves equipment utilization and operational efficiency.

[0069] Please see Figure 12 As shown, in some embodiments, the liquid dispensing assembly 6 includes a three-way valve 64, which is connected to a second connector 61, a third connector 62, and a fourth connector 63. The three-way valve 64 is provided with a switch 641, which allows the second connector 61 to be connected to the fourth connector 63 or the third connector 62 to be connected to the fourth connector 63 by rotating the switch 641.

[0070] When external liquid needs to be input, rotary switch 641 connects the liquid channels of the second connector 61 and the fourth connector 63, while closing the third connector 62; when independent flushing and sealing operation is required, rotary switch 641 connects the flow channels of the third connector 62 and the fourth connector 63, while disconnecting the second connector 61.

[0071] During the control of fluid flow, the three-way valve 64 ensures the independence of different fluid paths. When the fluid path between the third connector 62 and the fourth connector 63 is connected, the fluid path between the external fluid source and the intravenous catheter 4 is blocked, and vice versa. This independence prevents the mixing of two different fluid sources, thus preventing problems such as changes in efficacy and adverse reactions caused by fluid mixing, and ensuring the safety and effectiveness of fluid delivery.

[0072] Please see Figure 13 As shown, in some embodiments, the liquid dispensing assembly 6 includes a branch pipe 65, which includes a main pipe 651 and a branch pipe 652. The two ends of the main pipe 651 are respectively connected to the second connector 61 and the fourth connector 63. One end of the branch pipe 652 is connected to the third connector 62, and the other end is connected to the main pipe 651. A first pipe clamp 6521 is provided on the branch pipe 652, and a second pipe clamp 6511 is provided on the side of the main pipe 651 near the second connector 61.

[0073] The main tube 651 forms the infusion channel for fluid from an external fluid source to the intravenous catheter 4, and the branch tube 652 forms the infusion channel from the fluid supply component to the intravenous catheter 4. When the first clamp 6521 is open and the second clamp 6511 is closed, fluid for flushing the catheter flows from the fluid supply component into the intravenous catheter 4; when the first clamp 6521 is closed and the second clamp 6511 is open, external fluid enters the intravenous catheter 4 through the main tube 651. The drive pump, external fluid source, and intravenous catheter 4 can be integrated at low cost through the branch tube 65, the first clamp 6521, and the second clamp 6511, meeting the component requirements for flushing the catheter or basic intravenous infusion.

[0074] Please see Figures 13-14 As shown, in some embodiments, the flushing and sealing device further includes a detection mechanism 5. The detection mechanism 5 includes a housing 51, which is connected to the intravenous catheter 4. The outer wall of the housing 51 is provided with a plurality of scale values ​​511, which are used to indicate the hydraulic pressure value inside the housing 51, and / or the scale values ​​511 are used to indicate the liquid volume value inside the housing 51.

[0075] By observing the scale value 511 on the housing 51, the user can directly observe the changes in liquid pressure output by the squeezing component 2 and the volume of liquid inside the housing 51. During the sealing operation, quickly assessing the hydraulic pressure difference between the venous catheter 4 and the human blood vessel is crucial. The user observes the changes in hydraulic pressure within the venous catheter 4 through the scale value 511 to determine the effectiveness of flushing and sealing. If the hydraulic pressure value displayed by the detection mechanism 5 is too low, it indicates that the sealing operation needs to continue to maintain a positive pressure state within the venous catheter 4 relative to the human blood vessel; if the hydraulic pressure value displayed by the detection mechanism 5 remains high for a prolonged period, it indicates a good sealing effect, and there is no need to worry about blood flowing back into the venous catheter 4.

[0076] If problems such as blockage of the intravenous catheter 4 or partial bend in the infusion line occur, continuing to activate the squeezing assembly 2 will cause a sharp increase in pressure within the line. The operator can observe the housing 51 and, if an abnormal pressure spike is detected that far exceeds the range required for normal flushing or sealing, immediately stop the operation, eliminate any factors causing the blockage, and quickly resume normal flushing and sealing procedures.

[0077] Please see Figure 15 As shown, in some embodiments, a first piston 52 is provided inside the housing 51, and a first elastic member 521 is provided between the first piston 52 and the bottom wall of the housing 51. The two ends of the first elastic member 521 abut against the bottom wall of the housing 51 and the first piston 52, respectively.

[0078] The housing 51 is transparent and visible. The initial position is when the first piston 52 is near the intravenous catheter 4, at which point the first elastic element 521 is in its natural state. When the compression assembly 2 delivers fluid to the intravenous catheter 4, the fluid enters the housing 51, and hydraulic pressure acts on the side of the first piston 52 closest to the intravenous catheter 4, pushing the first piston 52 away from the intravenous catheter 4. The movement of the first piston 52 compresses the first elastic element 521 until the reaction force generated by the first elastic element 521 balances the fluid pressure transmitted from the hose 23. The scale value 511 corresponding to the position of the first piston 52 visually reflects the pressure of the fluid output by the compression assembly 2.

[0079] Please see Figure 16 As shown, in some embodiments, an elastic membrane 53 is provided inside the housing 51 on the side near the venous catheter 4. When the liquid in the tubing 23 enters the housing 51, the liquid causes the elastic membrane 53 to gradually expand.

[0080] Initially, the elastic membrane 53 is in a naturally contracted state, closely adhering to the housing 51 near the intravenous catheter 4. When the compression assembly 2 delivers fluid to the intravenous catheter 4, the fluid enters the elastic membrane 53 within the housing 51, and the hydraulic pressure causes the elastic membrane 53 to expand. The degree of diaphragm expansion corresponds to the scale value 511, which can intuitively reflect the hydraulic pressure value within the compression assembly 2 and the fluid volume value inside the housing 51.

[0081] When using the flushing and sealing device to operate the sealing tube, a certain amount of elastic potential energy can be stored through the first elastic element 521 or elastic membrane 53 in the detection mechanism 5 to continuously apply pressure to the liquid in the squeezing assembly 2, so that the liquid in the venous catheter 4 can be in a positive pressure state relative to the venous blood for a longer period of time, thereby prolonging the sealing effect.

[0082] Please see Figures 17-18As shown, in some embodiments, the housing 51 is provided with a groove 512, and the outer wall of the housing 51 is provided with a scale value 511 along the length direction of the groove 512; a second piston 54 is provided inside the housing 51 on the side near the venous catheter 4, and a second elastic member 541 is provided between the second piston 54 and the bottom wall of the housing 51; an indicator rod 55 is provided on the side of the second piston 54 away from the venous catheter 4, and the side of the indicator rod 55 away from the second piston 54 is slidably connected to the groove 512, and an indicator part 551 is provided at the end of the indicator rod 55 near the groove 512, which is used to indicate the corresponding scale value 511.

[0083] The outer wall of the housing 51 is provided with a slide groove 512. One end of the indicator rod 55 is slidably connected to the slide groove 512, and the end is provided with an indicator part 551. The movement of the second piston 54 is directly transmitted to the slide groove 512 through the indicator rod 55. The indicator part 551 accurately points to the scale value 511. When reading, the line of sight is vertically aligned with the slide groove 512 and the scale value 511, which greatly improves visibility and intuitiveness.

[0084] The indicator rod 55 is slidably connected to the slide groove 512. The inner wall of the slide groove 512 forms a physical limit on the indicator rod 55 to prevent the indicator rod 55 from shifting under vibration or impact, ensuring that the indicator part 551 always moves in the straight line direction of the scale value 511, avoiding reading deviation caused by the shaking of the rod, and improving measurement consistency.

[0085] Please see Figures 19-20 As shown, in some embodiments, the hose 23 includes an outer hose 232 and an inner hose 233. The outer hose 232 is located outside the housing 21, and its two ends are respectively connected to the liquid inlet connector 212 and the liquid storage component 1. The inner hose 233 is located inside the inner cavity 211, and its two ends are respectively connected to the liquid inlet connector 212 and the liquid outlet connector 213. The inner hose 233 abuts against the movable component 22.

[0086] When the movable part 22 moves relative to the outer shell 21 along the first preset direction D1, the movable part 22 moves away from the inner hose 233, and the liquid enters the inner hose 233 from the outer hose 232 through the inlet connector 212; when the movable part 22 moves relative to the outer shell 21 along the second preset direction D2, the movable part 22 squeezes the inner hose 233, and the liquid flows from the inner hose 233 through the outlet connector 213 to the intravenous catheter 4.

[0087] The outer hose 232 is mainly responsible for transporting liquid from the liquid storage component 1 to the extrusion assembly 2, and is a flexible transport pipeline outside the extrusion assembly 2. The inner hose 233 is located in the working area inside the outer shell 21 and directly participates in the process of liquid intake and discharge in the extrusion assembly 2.

[0088] The movable component 22 moves along the first preset direction D1, moving away from the inner hose 233. Liquid enters the inner hose 233 from the outer hose 232 through the inlet connector 212, which is the process of the squeezing component 2 drawing liquid from the storage component 1. The movable component 22 moves along the second preset direction D2, compressing the inner hose 233 to deform it, so that the liquid in the inner hose 233 flows to the venous catheter 4 through the outlet connector 213, which is the process of the squeezing component 2 infusing liquid into the venous catheter 4.

[0089] Please see Figure 21 As shown, in some embodiments, the inner flexible tube 233 includes a thick tube 2331 and a thin tube 2332, and different moving parts 22 are provided in the inner cavity 211 corresponding to the thick tube 2331 and the thin tube 2332. By pressing the different moving parts 22 to squeeze the thick tube 2331 or the thin tube 2332, the volume of liquid drawn into the liquid storage component 1 or the volume of liquid discharged from the flexible tube 233 can be controlled.

[0090] When sealing the catheter, a small amount of solution needs to be injected into the venous catheter 4. The movable part 22 can be pressed to squeeze the thin tube 2332, allowing a sufficient amount of solution to enter the venous catheter 4. When flushing the catheter, a larger amount of solution needs to be injected into the venous catheter 4. The movable part 22 on the thick tube 2331 can be pressed to output a larger amount of solution to the venous catheter 4 for flushing.

[0091] Please see Figure 4 As shown, in some embodiments, the liquid storage component 1 includes a liquid storage tube 12, and a third piston 121 is provided inside the liquid storage tube 12. When the liquid in the liquid storage tube 12 flows to the hose 23, the third piston 121 moves toward the hose 23 under the action of atmospheric pressure.

[0092] When the first connector 231 is connected to the liquid storage tube 12, and the squeezing assembly 2 continuously absorbs liquid from the liquid storage tube 12, the pressure inside the liquid storage tube 12 is lower than the external atmospheric pressure. Under the action of the pressure difference, the third piston 121 continuously approaches the hose 23. When the liquid inside the liquid storage tube 12 is emptied, the third piston 121 will move to the foremost position of the liquid storage tube 12.

[0093] By shifting the power source for liquid supply to atmospheric pressure, the liquid storage component 1 becomes a passive quantitative liquid supply module, which works perfectly with the active liquid suction and discharge module of the extrusion component 2 to achieve a fully enclosed, automatic liquid supply, easy operation, low cost, and high safety flushing and sealing pipe system.

[0094] Please see Figure 5 As shown, in some embodiments, the end face of the reservoir tube 12 away from the hose 23 is provided with a breathable membrane 122; the breathable membrane 122 is configured to be breathable and block pathogens.

[0095] When the liquid volume in the storage tube 12 decreases, its internal air pressure drops. Outside air enters the storage tube 12 through the vent membrane 122 to replenish the air pressure, preventing poor liquid delivery due to negative pressure. Pressure balance ensures that the outflow rate of the liquid in the storage tube 12 matches the pumping rate of the pump, maintaining a stable flow output and preventing sudden fluctuations in flow due to pressure fluctuations.

[0096] The liquid in the reservoir 12 must be strictly sterile; otherwise, it may cause infection of the intravenous catheter 4 or systemic inflammation. The antibacterial properties of the breathable membrane 122 can effectively intercept airborne bacteria and pathogens carried by dust, preventing germs and debris from entering the reservoir 12 with the air and contaminating the liquid.

[0097] Please see Figures 9-10 As shown, in some embodiments, the liquid storage component 1 includes a solution bag 13; when the liquid in the solution bag 13 flows to the hose 23, the solution bag 13 shrinks in volume under atmospheric pressure. The solution bag 13 is used to contain and supply liquid, and as the liquid in the solution bag 13 enters the squeezing assembly 2 through the hose 23, atmospheric pressure gradually flattens the solution bag 13. The solution bag 13, as a disposable consumable, has the advantages of low cost, good sealing effect, and the ability to keep the liquid in the flushing tube in a relatively sterile environment.

[0098] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A pipe sealing device, characterized in that, include: A liquid storage component is configured to store liquid for flushing the sealing tube; A compression assembly includes a housing, a movable component, and a hose; the housing has an inner cavity, the movable component is at least partially located in the inner cavity and slidably connected to the housing; the housing has an inlet connector and an outlet connector communicating with the inner cavity, the inlet connector is connected to one end of the hose, the other end of the hose is connected to a liquid storage component, and the outlet connector is used to connect to a venous catheter communicating with a human blood vessel; the inlet connector has a first one-way valve configured to allow liquid to flow unidirectionally into the inner cavity; the outlet connector has a second one-way valve configured to allow liquid to flow unidirectionally into the venous catheter; When the moving part moves relative to the outer shell along a first preset direction, the liquid in the liquid storage component flows into the inner cavity through the first one-way valve; when the moving part moves relative to the outer shell along a second preset direction, the liquid inside the inner cavity flows to the venous catheter through the second one-way valve, wherein the first preset direction and the second preset direction are opposite to each other.

2. The flushing and sealing tube device according to claim 1, characterized in that, The inner cavity includes a positioning cavity and a solution cavity. The moving part is slidably connected to the positioning cavity. The solution cavity is provided with the inlet connector and the outlet connector. The extrusion assembly also includes an elastic bladder. The elastic bladder is disposed in the positioning cavity. One side of the elastic bladder communicates with the solution cavity, and the other side abuts against the moving part. When the movable component moves relative to the inner cavity along the first preset direction, the movable component moves away from the elastic bladder, causing the liquid in the liquid storage component to flow into the solution cavity; When the movable member moves relative to the inner cavity along the second preset direction, the movable member squeezes the elastic bladder, causing the liquid inside the solution cavity to flow into the venous catheter.

3. The flushing and sealing tube device according to claim 2, characterized in that, The movable component includes a button, and the outer wall of the button is provided with a guide strip, which is parallel to the first preset direction; the inner wall of the positioning cavity is provided with a guide groove corresponding to the position of the guide strip, and the guide strip is disposed in the guide groove; When the button moves to the first position along the first preset direction, one end of the guide strip abuts against the inner wall of the guide groove to restrict the button from moving further. When the button moves to the second position along the second preset direction, the other end of the guide bar abuts against the bottom wall of the positioning cavity to restrict the button from moving further.

4. The flushing and sealing tube device according to claim 1, characterized in that, The movable component includes a piston rod, which includes a rod portion and a piston head; one end of the rod portion is located outside the inner cavity, and the other end is fixed to the piston head; the piston head is in contact with the inner wall of the inner cavity.

5. The flushing and sealing tube device according to claim 1, characterized in that, The outer casing includes a positioning chamber configured to house the liquid storage component, and the positioning chamber has an openable and closable side cover; when the side cover is closed, the liquid storage component is fixed relative to the extrusion assembly; when the side cover is opened, the liquid storage component can be separated from the extrusion assembly.

6. The flushing and sealing tube device according to claim 1, characterized in that, The liquid storage component is provided with a silicone valve at one end near the hose, and a first connector is provided at the end of the hose away from the liquid inlet. The first connector can be connected to the liquid storage component. When the first connector is connected to the liquid storage component, a portion of the first connector passes through the silicone valve, so that the liquid storage component is in communication with the hose.

7. The flushing and sealing tube device according to claim 1, characterized in that, The flushing and sealing device further includes a liquid distribution assembly, which includes a second connector, a third connector, and a fourth connector; the second connector is used to connect to an external liquid source, the third connector is used to connect to the liquid outlet connector, and the fourth connector is used to connect to the intravenous catheter; the liquid distribution assembly is configured to control the opening and closing of the liquid delivery path between the second connector and the fourth connector or the opening and closing of the liquid delivery path between the third connector and the fourth connector.

8. The flushing and sealing tube device according to claim 7, characterized in that, The liquid separation assembly includes a three-way valve, which is connected to the second connector, the third connector, and the fourth connector. The three-way valve is equipped with a switch, which, when rotated, connects the second connector to the fourth connector or the third connector to the fourth connector.

9. The flushing and sealing tube device according to claim 7, characterized in that, The liquid separation assembly includes a branch pipe, which includes a main pipe and a branch pipe. The two ends of the main pipe are respectively connected to the second connector and the fourth connector. One end of the branch pipe is connected to the third connector, and the other end is connected to the main pipe. The branch pipe is provided with a first pipe clamp, and the main pipe is provided with a second pipe clamp on the side near the second connector.

10. The flushing and sealing tube device according to claim 1, characterized in that, The flushing and sealing device further includes a detection mechanism; the detection mechanism includes a housing, which is connected to the venous catheter; the outer wall of the housing is provided with multiple scale values, which are used to indicate the hydraulic pressure value inside the housing, and / or the scale values ​​are used to indicate the liquid volume value inside the housing.

11. The flushing and sealing tube device according to claim 10, characterized in that, The housing contains a first piston, and a first elastic element is provided between the first piston and the bottom wall of the housing. The two ends of the first elastic element abut against the bottom wall of the housing and the first piston, respectively.

12. The flushing and sealing tube device according to claim 10, characterized in that, An elastic membrane is provided inside the housing on the side near the venous catheter. When liquid from the tubing enters the housing, the liquid causes the elastic membrane to gradually expand.

13. The flushing and sealing tube device according to claim 10, characterized in that, The housing is provided with a groove, and the outer wall of the housing is provided with the scale value along the length of the groove; a second piston is provided inside the housing near the venous catheter, and a second elastic element is provided between the second piston and the bottom wall of the housing; an indicator rod is provided on the side of the second piston away from the venous catheter, and the side of the indicator rod away from the second piston is slidably connected to the groove, and an indicator part is provided at the end of the indicator rod near the groove, the indicator part being used to indicate the corresponding scale value.

14. The flushing and sealing tube device according to claim 1, characterized in that, The hose includes an outer hose and an inner hose; the outer hose is located outside the housing and its two ends are respectively connected to the liquid inlet connector and the liquid storage component; the inner hose is located inside the inner cavity and its two ends are respectively connected to the liquid inlet connector and the liquid outlet connector, and the inner hose abuts against the moving part; When the movable component moves relative to the outer casing along a first preset direction, the movable component moves away from the inner hose, and liquid enters the inner hose from the outer hose through the inlet connector; when the movable component moves relative to the outer casing along a second preset direction, the movable component squeezes the inner hose, and liquid flows from the inner hose through the outlet connector to the venous catheter.

15. The flushing and sealing tube device according to any one of claims 1-14, characterized in that, The liquid storage component includes a liquid storage tube, and a third piston is provided inside the liquid storage tube; when the liquid in the liquid storage tube flows to the hose, the third piston moves toward the hose under the action of atmospheric pressure.

16. The flushing and sealing tube device according to claim 15, characterized in that, The end face of the liquid storage tube away from the flexible tube is provided with a breathable membrane; the breathable membrane is configured to be breathable and block pathogens.

17. The flushing and sealing tube device according to any one of claims 1-14, characterized in that, The liquid storage component includes a solution bag; when the liquid in the solution bag flows to the hose, the solution bag shrinks in volume under atmospheric pressure.

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