Sealing valve and conveying system

Abstract

The invention provides a sealing valve and a conveying system, the sealing valve is used for the conveying system, and the sealing valve comprises a valve seat, a sealing structure and a control part; the sealing structure is arranged in the valve seat; the sealing structure comprises a first kerf part, the first kerf part has elasticity, a first kerf is formed in the first kerf part, and the shape of the first kerf comprises a bent shape; the far end of the control piece extends into the valve seat and can be screwed into the far end of the valve seat under the action of external force; the control piece can extrude the first kerf part in the moving stroke so that the first kerf can be switched from the closed state to the open state, and after the external force is removed, the elasticity of the first kerf part can promote the control piece to rotate back. And the first kerf can be switched from the open state to the closed state under the elastic acting force of the first kerf part. According to the sealing valve and the conveying system, the sealing effect of the sealing valve can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a sealing valve and a delivery system. Background Art

[0002] During medical procedures such as cardiovascular interventional treatment or angiography, it is usually necessary to enter the human blood vessels through percutaneous puncture, establish a treatment channel using a sheath, and transport the corresponding medical equipment through the treatment channel to the diseased area for angiography, treatment, etc. During the interventional surgery, in order to reduce the loss of blood to the body through the treatment channel and prevent extracorporeal air from entering the blood vessels, a sealing valve is usually set on the sheath. First of all, when the instrument is inserted into or withdrawn from the sheath, effective sealing is required. Secondly, the friction resistance generated by the sealing valve on the instrument entering and exiting the sheath should be as small as possible, otherwise it will affect the doctor's control of the instrument during the operation. However, the sealing valve in the related art has insufficient sealing performance in the process of establishing a treatment channel for the interventional element, and is prone to bleeding, which affects the safety and reliability of use. Summary of the invention

[0003] The invention provides a sealing valve and a conveying system, aiming to improve the sealing effect of the sealing valve.

[0004] An embodiment of the present invention provides a sealing valve for use in a delivery system, the sealing valve comprising:

[0005] Valve seat;

[0006] A sealing structure is disposed in the valve seat; the sealing structure comprises a first slit portion, the first slit portion is elastic, the first slit portion is formed with a first slit, and the shape of the first slit comprises a curved shape;

[0007] A control member, the distal end of which extends into the valve seat and can be rotated toward the distal end of the valve seat under the action of an external force; the control member can squeeze the first slit portion within a moving stroke to switch the first slit from a closed state to an open state, and when the external force is removed, the elasticity of the first slit portion can cause the control member to rotate back, and the first slit can be switched from the open state to the closed state under the elastic force of the first slit portion.

[0008] In some embodiments, the number of the first slits includes multiple, the multiple first slits radiate outward from a preset center of the first slit portion, and the multiple first slits are spirally deflected in the same direction.

[0009] In some embodiments, the plurality of sealing leaves formed on the first slit portion after cutting by the first slit partially overlap with adjacent sealing leaves.

[0010] In some embodiments, a distal surface of the sealing structure is formed with a groove, and the groove is arranged around the first slit.

[0011] In some embodiments, the first slit portion includes a thinning area, and the first slit is formed in the thinning area; the thinning area is formed by a portion of the distal end surface of the first slit portion being recessed toward the proximal end surface of the first slit portion.

[0012] In some embodiments, the sealing structure comprises:

[0013] a first sealing layer, wherein the first slit is provided in the first sealing layer and axially penetrates the first sealing layer;

[0014] The second sealing layer is coaxially arranged with the first sealing layer, the second sealing layer is formed with a second slit, the second slit axially penetrates the second sealing layer, and a projection of the second slit on the first sealing layer does not overlap with the first slit.

[0015] In some embodiments, the sealing structure also includes an intermediate layer, which is arranged between the first sealing layer and the second sealing layer, and the hardness of the first sealing layer and the second sealing layer is less than the hardness of the intermediate layer; the intermediate layer is formed with a third slit, and the third slit axially penetrates the intermediate layer.

[0016] In some embodiments, the sealing valve includes two sealing structures, the sealing valve includes two sealing structures, the two sealing structures are coaxially arranged, the first slit portion protrudes along the axial direction, and the protruding directions of the first slit portions of the two sealing structures are opposite.

[0017] In some embodiments, the sealing valve also includes a sealing member, which forms a hollow channel, and the hollow channel is connected to the first slit. The proximal end and the distal end of the hollow channel are respectively formed with a first constriction and a second constriction, and the inclination of the wall of the second constriction is smaller than the inclination of the wall of the first constriction. The sealing member is used to seal with the control member of the sealing valve.

[0018] In some embodiments, the sealing valve further comprises a knob, wherein the knob is fixedly connected to the control member; the knob is movably connected to the valve seat, and the inner circumferential surface of the knob is provided with at least one protrusion.

[0019] In some embodiments, the outer circumferential surface of the valve seat is provided with a first circumferential groove and a second circumferential groove extending in the circumferential direction, the distal ends of the first circumferential groove and the second circumferential groove are flush, and the width of the second circumferential groove in the axial direction of the valve seat is greater than that of the first axial groove; one end of the first circumferential groove is connected to the second circumferential groove, and the other end of the first circumferential groove is a closed end;

[0020] The first circumferential groove and the second circumferential groove move to provide a movable track for the protrusion of the knob.

[0021] The embodiment of the present invention further provides a conveying system, comprising:

[0022] Sheath;

[0023] Three-way valve; and

[0024] In the sealing valve as described in any one of the above items, the sheath tube and the three-way valve are both communicated with the sealing valve.

[0025] The sealing valve and delivery system provided by the embodiments of the present invention have a sealing structure of the sealing valve including a first slit portion, the first slit portion is formed with a first slit, and the shape of the first slit includes a curved shape. The control member can squeeze the first slit portion within a moving stroke to switch the first slit from a closed state to an open state. Therefore, when the control member squeezes the first slit portion or inserts an intervening element, the curved shape of the first slit can increase the contact area between the first slit portion and the intervening element or the control member, so that the first slit portion is better attached to the intervening element or the control member, thereby improving the sealing effect of the first slit portion, thereby improving the sealing effect of the sealing valve, and effectively preventing blood leakage and / or external air from entering the body.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0028] Figure 1 is a structural schematic diagram of a sealing valve provided by an embodiment of the present invention;

[0029] Figure 2 is an exploded schematic diagram of a sealing valve provided by an embodiment of the present invention;

[0030] Figure 3is a structural schematic diagram of a sealing structure provided by an embodiment of the present invention;

[0031] Figure 3a is a structural schematic diagram of a sealing structure provided by an embodiment of the present invention;

[0032] Figure 4 is a cross-sectional view of a sealing valve provided by an embodiment of the present invention, wherein the first slit is in a closed state;

[0033] Figure 5 is a cross-sectional view of a sealing valve provided by an embodiment of the present invention, wherein the first slit is in an open state;

[0034] Figure 6 is a three-dimensional diagram of a sealing structure provided by an embodiment of the present invention;

[0035] Figure 7 is a front view of a valve seat provided by an embodiment of the present invention, wherein a circumferential groove and an axial groove are shown;

[0036] Figure 8 is a three-dimensional diagram of a knob provided by an embodiment of the present invention;

[0037] Fig. 9 is a front view of a valve seat provided by an embodiment of the present invention, wherein a first circumferential groove and a second circumferential groove are shown;

[0038] Fig.10 is a cross-sectional view of a sealing valve provided by an embodiment of the present invention, wherein a threaded connection structure of a valve seat and a knob is shown;

[0039] Fig.11 is a perspective view of a sealing structure provided by an embodiment of the present invention, wherein a slot is shown;

[0040] Fig.12 yes Fig.11 A cross-sectional view of the sealing structure in FIG.

[0041] Fig.13 is a three-dimensional diagram of a sealing structure provided by an embodiment of the present invention, wherein a thinning area is shown;

[0042] Fig.14 yes Fig.13 A cross-sectional view of the sealing structure in FIG.

[0043] Fig.15 is a cross-sectional view of a sealing structure provided by an embodiment of the present invention, wherein a first sealing layer and a second sealing layer are shown;

[0044] Fig.16 yes Fig.15 A left side view of the sealing structure in FIG.

[0045] Fig.17 is a partial cross-sectional view of a sealing valve provided by an embodiment of the present invention, wherein two sealing structures are shown;

[0046] Fig.18 yes Fig.17 Schematic diagram of structural decomposition;

[0047] Fig.18a is a schematic diagram of the structural decomposition of a sealing valve provided by an embodiment of the present invention, wherein two sealing structures are shown;

[0048] Fig.19 is a partial cross-sectional view of a sealing valve provided by an embodiment of the present invention, wherein a sealing structure and a sealing member are shown;

[0049] Fig. 20 yes Fig.19 Schematic diagram of the decomposition of

[0050] Fig.21 It is a schematic diagram of the structure of a conveying system provided in one embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1000. Conveying system;

[0053] 100. Sealing valve;

[0054] 10. valve seat; 11. limiting edge; 12. limiting column; 13. axial groove; 14. circumferential groove; 15. first circumferential groove; 16. second circumferential groove;

[0055] 20. Sealing structure; 21. First slit; 211. First slit; 2113. Linear slit; 2114. Curved slit; 212. Sealing leaf; 2121. First edge; 2122. Second edge; 213. Thinning area; 214. Non-thinning area; 22. Connecting part; 221. Notch; 222. Through hole; 23. Groove; 24. First sealing layer; 25. Second sealing layer; 251. Second slit; 26. Intermediate layer;

[0056] 30. Control part; 31. Threaded connection part;

[0057] 40. Sealing gasket;

[0058] 50. knob; 51. raised part

[0059] 60, sealing member; 61, hollow channel; 611, first constriction; 612, second constriction;

[0060] 70. Sealing ring

[0061] 200. Sheath; 300. Three-way valve. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0064] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0065] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0066] During interventional surgery or interventional diagnosis, when inserting or withdrawing interventional elements, the delivery system needs to be able to perform effective sealing in order to prevent excessive blood loss. On the other hand, when the interventional element enters and exits the sheath, the friction resistance coefficient should be as small as possible, otherwise it will seriously affect the operating performance of the interventional element and reduce the doctor's operating feel.

[0067] However, the sealing valve of the delivery system in the related art has insufficient sealing performance during the process of establishing a channel for the interventional element, and is prone to bleeding, which affects the safety and reliability of use.

[0068] To this end, an embodiment of the present invention provides a sealing valve and a conveying system to improve the sealing effect of the sealing valve.

[0069] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0070] It is understandable that in the field of interventional medical devices, the "distal end" is defined as the end away from the operator during surgery, and the "proximal end" is defined as the end close to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device, and "circumferential" refers to the direction perpendicular to the above-mentioned axial direction.

[0071] See also Figure 1 and Figure 2 The embodiment of the present invention provides a sealing valve 100 for a conveying system. The sealing valve 100 includes a valve seat 10, a sealing structure 20 and a control member 30. The sealing structure 20 is disposed in the valve seat 10. Figure 3 As shown, the sealing structure 20 includes a first slit portion 21. The first slit portion 21 is elastic and is formed with a first slit 211. The shape of the first slit 211 includes a curved shape. The distal end of the control member 30 extends into the valve seat 10 and can be rotated toward the distal end of the valve seat 10 under the action of an external force; the control member 30 can squeeze the first slit portion 21 within the moving stroke to switch the first slit 211 from a closed state to an open state. When the external force is removed, the elasticity of the first slit portion 21 can cause the control member 30 to rotate back, and the first slit 211 can be switched from the open state to the closed state under the elastic force of the first slit portion 21.

[0072] In the sealing valve 100 of the above-mentioned embodiment, since the sealing structure 20 of the sealing valve 100 includes a first slit portion 21, the first slit portion 21 is formed with a first slit 211, and the shape of the first slit 211 includes a curved shape, the control member 30 can squeeze the first slit portion 21 within the moving stroke to switch the first slit 211 from a closed state to an open state. Therefore, when the control member 30 squeezes the first slit portion 21 or inserts an intervening element, the curved first slit 211 can increase the contact area between the first slit portion 21 and the intervening element or the control member 30, so that the first slit portion 21 is better attached to the intervening element or the control member 30, thereby improving the sealing effect of the first slit portion 21, and further improving the sealing effect of the sealing valve 100, effectively preventing blood leakage and / or external air from entering the body.

[0073] The interventional element includes a medical device or auxiliary device that needs to be inserted into the body, such as an interventional element including at least one of the following: a catheter, a guidewire, a dilator, a loader, etc. When the interventional element is a loader, after the distal end of the loader is inserted into the sealing valve, a delivery channel is formed inside the loader, and the loader can be fixedly connected to the control member 30 so that the loader is in a stable state during the delivery process. Specifically, Figure 1 As shown, the proximal end of the control member 30 has a threaded connection portion 31, and the threaded connection portion 31 is used for fixed connection with the loader.

[0074] Before inserting the intervening element, the control member 30 needs to be moved distally until the control member 30 is pressed against the first slit portion 21, and the first slit portion 211 is switched to an open state. Then the intervening element is inserted into the sealing valve 100. At this time, since the control member 30 acts on the first slit portion 21, the first slit portion 21 is not in close contact with the intervening element, and a sealing effect has not been achieved. Finally, after the force applied to the control member 30 is removed, the first slit portion 21 rebounds until the first slit portion 21 is in close contact with the outer wall of the intervening element, achieving a sealing effect.

[0075] It should be noted that when the first slit 211 is in an open state, blood can flow out of the body along the first slit 211, for example, when the control member 30 stretches the first slit 211, the degree of stretching of the first slit 211 is not limited; when the first slit 211 is in a closed state, blood cannot flow out of the body along the first slit 211, for example, when the first slit portion 21 is not affected by the force of the control member and is in a natural state, or when the first slit portion 21 is close to the outer wall of the interventional element.

[0076] For example, the first slit 211 in the open state has multiple different opening degrees, and the opening degree of the first slit 211 depends on the advancement degree of the control member 30. As the control member 30 gradually moves toward the distal end, the opening degree of the first slit 211 increases. In this way, the sealing valve 100 can be adapted to the intervention elements of different sizes to achieve sealing, thereby improving the compatibility of the sealing valve 100.

[0077] Exemplarily, the sealing valve 100 is in a closed state when the first slit 211 is in a closed state. Figure 4 When the first slit 211 is in the open state, the sealing valve 100 is as shown in FIG. Figure 5 shown.

[0078] Exemplarily, the shape of the first slit 211 includes at least one of the following: arc-shaped, wavy-shaped, S-shaped, etc.

[0079] In some embodiments, Figure 3As shown, the number of the first slits 211 includes multiple, multiple first slits 211 radiate outward from a preset center, and multiple first slits 211 are spirally deflected in the same direction. In this way, the sealing effect of the first slit portion 21 can be improved. Specifically, as Figure 3 In the sealing structure 2 shown in the figure, the shape of the plurality of sealing leaves 212 formed on the first slit portion 21 after being cut by the first slit 211 also has a curved spiral edge. Compared with the sealing leaves formed by cutting with a straight slit, Figure 3 The sealing leaf 212 can better fit the cylindrical intervening element in the circumferential direction to improve the sealing effect. For example, the preset center can be any suitable position on the first slit portion 21, such as the center of the first slit portion 21; for another example, the preset center is spaced from the center of the first slit portion 21 by a preset distance, and the preset distance is less than the radius of the first slit portion 21.

[0080] It can be understood that when the control member 30 is rotated from the proximal end to the distal end, the control member 30 can be rotated in the axial direction from the proximal end to the distal end by a preset stroke to squeeze the first slit portion 21, so that the first slit portion 211 can be switched from a closed state to an open state, and the first slit portion 21 is elastically deformed. When the force applied to the control member 30 is removed, the elastically deformed first slit portion 21 can generate a rotational force in the circumferential direction in addition to an axial thrust on the control member 30, which is conducive to the control member 30 to quickly move from the distal end to the proximal end until the first slit portion 21 is tightly against the intervention element.

[0081] For example, when the control member 30 is rotated from the proximal end to the distal end, the rotation direction of the control member 30 is as follows: Figure 3 The ω direction is shown in FIG.

[0082] Exemplarily, when the control member 30 is rotated from the proximal end to the distal end, the rotation direction of the control member 30 is the same as the spiral direction of the first slit.

[0083] It can be understood that the number of the first slits 211 can be set according to actual needs, such as one, two, three, four, five, six, seven, eight or more.

[0084] Exemplarily, the number of the first slits 211 includes a plurality, and the shapes of the plurality of first slits 211 may be the same or different, as long as the shape of each first slit 211 includes a curved shape.

[0085] In some embodiments, Figure 3a As shown, the sealing leaves 212 partially overlap with the sealing leaves 212 next to them. Figure 3aIn the figure, the portion of the sealing leaf 212 blocked by the adjacent sealing leaf is indicated by a dotted line, the first edge 2121 of the sealing leaf 212 is overlapped on the adjacent sealing leaf, and the second edge 2122 of the sealing leaf 212 is placed under the adjacent sealing leaf on the other side. The end of the sealing leaf 212 can be pressed thinner and the area can be enlarged by hot pressing, so that the adjacent sealing leaves 212 can be partially overlapped. At the same time, the sealing leaf 212 can be more compliant with the intervening element, thereby improving the sealing effect.

[0086] Since the adjacent sealing leaves at least partially overlap, when the first slit 211 is in a closed state, the sealing leaves 212 are closer together, and the sealing effect of the sealing structure is better. When the control member 30 is rotated toward the distal end, the first slit 211 is stretched open, and the sealing leaves 212 with a larger area wrap the control member 30 better. When the control member 30 is rotated back, the sealing leaves 212 are restored to a state of overlapping in sequence under the action of the control member 30, so as to avoid the disorder of the stacking order of the sealing leaves 212 during the rebound process, which leads to a decrease in the sealing effect.

[0087] See also Figure 6 In some embodiments, the sealing structure 20 further includes a connecting portion 22, which is used to connect to the valve seat 10, and the connecting portion 22 is connected to the outer periphery of the first slit portion 21. In this way, the sealing structure 20 can be connected to the valve seat 10 through the connecting portion 22. Exemplarily, the connection between the connecting portion 22 and the valve seat 10 includes at least one of plug-in connection and clamping connection, so as to limit the rotation of the sealing structure 20 in the circumferential direction. Figure 6 As shown, the circumference of the connecting portion 22 is provided with a plurality of notches 221, and the connecting portion 22 is also provided with a plurality of through holes 222, and the through holes 222 are evenly distributed along the circumference of the connecting portion 22. Figure 2 The inner wall surface of the valve seat 10 is provided with a plurality of limiting edges 11, and the limiting edges 11 are used to engage with the notches 221 on the connecting portion 22. A plurality of limiting posts 12 are also provided in the valve seat 10, and the limiting posts 12 are used to be plugged with the through holes 222 on the connecting portion 22. Through the cooperation between the limiting edges 11 and the notches 221, and the cooperation between the limiting posts 12 and the through holes 222, the sealing structure 20 is circumferentially fixed in the valve seat 10. Further, the sealing valve 100 also includes a sealing gasket 40, which is provided at the proximal end of the sealing structure 20, and is used to further seal and fix the sealing structure 20, and the sealing gasket 40 is also provided with notches and through holes for cooperating with the limiting edges and limiting posts on the valve seat. Furthermore, the valve seat 10 and the sealing gasket 40 are fixed by adhesive, so that the sealing gasket 40 and the sealing structure are axially fixed in the valve seat 10 .

[0088] Combination Figure 1 , Figure 4 and Figure 5 The proximal ends of the limiting edge 11 and the limiting column 12 do not extend to the proximal end of the valve seat 10, so the control member 30 can rotate in the valve seat 10, that is, the control member 30 can spin the sealing structure 20 under the action of external force.

[0089] Please look back Figure 2 In some embodiments, the sealing valve 100 further includes a knob 50, which is fixedly connected to the control member 30. The operator can operate the knob 50 so that the knob 50 drives the control member 30 to squeeze the first slit portion 21, thereby switching the first slit 211 from a closed state to an open state. The control member 30 is inserted into the knob 50, and the distal end of the knob 50 is rotatably sleeved outside the proximal end of the valve seat 10. The proximal end of the knob 50 is fixedly connected to the control member 30, and the knob 50 can push the control member 30 when it moves toward the distal end under external force, thereby squeezing the first slit portion 21. Exemplarily, the fixed connection method between the control member 30 and the knob 50 includes at least one of a threaded connection (such as a threaded connection through a locking nut), an adhesive connection, a snap connection, etc.

[0090] The knob 50 is movably connected to the valve seat 10, for example Figure 7 In the embodiment, the outer peripheral surface of the sealing valve is provided with an axial groove 13 and a circumferential groove 14, the proximal end of the axial groove 13 penetrates the proximal end surface of the valve seat 10, the distal end of the axial groove 13 is connected to one end of the circumferential groove 14, and the circumferential groove 14 extends along the circumference of the valve seat. Figure 8As shown, at least one protrusion 51 is provided on the inner circumferential surface of the knob 50. When the knob 50 is not subjected to external force, the protrusion 51 is located in the axial groove 13. When the sealing member 20 needs to be squeezed, the knob 50 needs to be pushed distally until the protrusion 51 falls into the circumferential groove 14, and then the knob 50 is rotated so that the protrusion 51 is locked in the circumferential groove 14, and the first slit 211 is opened. When the knob 50 rotates, it drives the control member 30 to rotate, so that the sealing leaf 22 of the sealing member 20 undergoes elastic deformation. The sealing leaf that undergoes elastic deformation along the spiral deflection direction of the first slit 211 can better fit on the control member 30, thereby improving the sealing effect. After the intervening element is inserted, when the knob 50 is rotated in the opposite direction to remove the force applied to the control member 30, the elastically deformed sealing leaf 22 generates a rotational force in the circumferential direction, which is conducive to the control member 30 to quickly withdraw from the circumferential groove 14, thereby allowing the control member 30 to move faster from the distal end to the proximal end until the first slit portion 21 is in close contact with the intervening element. The circumferential length of the circumferential groove 14 is at least 1 / 6 of the circumference of the outer circumference of the knob 50, so that the sealing leaf 22 can undergo sufficient elastic deformation. The valve seat 10 and the knob 50 may include one or more groups of the axial grooves, circumferential grooves and protrusions.

[0091] In some embodiments, Fig. 9 As shown, the outer circumferential surface of the valve seat 10 is provided with a first circumferential groove 15 and a second circumferential groove 16 extending in the circumferential direction, the distal ends of the first circumferential groove 15 and the second circumferential groove 16 are flush, and the width of the second circumferential groove 16 in the axial direction of the valve seat 10 is greater than that of the first axial groove 15. One end of the first circumferential groove 15 is connected to the second circumferential groove 16, and the other end of the first circumferential groove 15 is a closed end. Figure 8The knob 50 in the embodiment matches the valve seat 10 in this embodiment. When the knob 50 is not subjected to external force, the protrusion 51 of the knob 50 is located in the second circumferential groove 16. When the sealing member 20 needs to be squeezed, the knob 50 needs to be rotated distally until the protrusion 51 enters the first circumferential groove 15 and is locked in the first circumferential groove 15, at which time the first slit 211 is opened. When the knob 50 is rotated distally, the control member 30 is driven to rotate, so that the sealing leaf 22 of the sealing member 20 is pushed open and elastically deformed. The sealing leaf that is elastically deformed along the spiral deflection direction of the first slit 211 can better fit on the control member 30, thereby improving the sealing effect. After the intervening element is inserted, when the knob 50 is rotated in the reverse direction to remove the force applied to the control member 30, the protrusion 51 of the knob 50 escapes from the first circumferential groove 15, and then the control member 30 is quickly retracted under the elastic action of the sealing leaf 22 until the first slit 21 is closely attached to the intervening element. At the same time, the elastically deformed sealing leaf 22 generates a rotational force in the circumferential direction, which is conducive to the retraction of the control member 30. The valve seat 10 and the knob 50 may include one or more sets of the first circumferential groove, the second circumferential groove and the protrusion.

[0092] In some embodiments, Fig.10 As shown, the knob 50 is connected to the valve seat 10 by a thread. When the knob 50 is screwed inwardly toward the distal end under the action of an external force, the control member 30 is also screwed inwardly toward the distal end at the same time. The sealing leaf 22 on the sealing member 20 is pushed away toward the distal end by the control member 30 and elastically deformed along the spiral deflection direction of the first slit 211. The sealing leaf 22 elastically deformed along the spiral deflection direction of the first slit 211 can better fit on the control member 30. When the knob 50 is rotated in the reverse direction, the elastically deformed sealing leaf 22 generates a rotational force in the circumferential direction, which helps to withdraw the control member 30.

[0093] In other embodiments, the control member 30 may be directly movably connected to the valve seat 10 without adding the knob 50 .

[0094] In some embodiments, Fig.11 and Fig.12 As shown, the distal end surface of the sealing structure 20 is formed with a slot 23, which is arranged around the first slit 211. When the control member 30 squeezes the first slit portion 21, the first slit portion 21 can be elastically deformed, and the slot 23 can provide a deformation space for the elastic deformation of the first slit portion 21. In this way, the control member 30 squeezes the first slit portion 21 with a smaller force to switch the first slit 211 from a closed state to an open state, and the first slit 211 can be opened wider, so that the intervening element can be better inserted into the sealing valve 100.

[0095] For example, the depth of the groove 23 can be set according to actual needs, for example, the maximum depth of the groove 23 is 0.1-0.2 times the thickness of the sealing structure 20 to avoid fracture caused by excessive depth. And the cross-sectional shape of the groove 23 is preferably an arc to avoid stress concentration.

[0096] See also Fig.13 and Fig.14 In some embodiments, the first slit portion 21 includes a thinning area 213, and the first slit 211 is formed in the thinning area 213. The thinning area 213 can appropriately reduce the resistance encountered by the control member 30 when squeezing the first slit portion 21, or appropriately reduce the resistance encountered by the intervening element when inserting the first slit portion 21, without changing the size of the first slit portion 21; and can reduce the weight of the sealing structure 20.

[0097] See also Fig.14 In some embodiments, the thinning area 213 is formed by being recessed from the distal surface of the first slit portion 21 to the proximal surface of the first slit portion 21, so as to ensure that the control member 30 can push open the first slit 211 within the moving stroke, thereby reducing the degree of stress concentration occurring when the first slit 211 switches from a closed state to an open state, which is beneficial to improving the service life of the sealing structure 20.

[0098] See also Fig.13 and Fig.14 In some embodiments, the first slit portion 21 further includes a non-thinning area 214, which is arranged outside the first slit 211, and the thinning area 213 is connected to the non-thinning area 214, and the thickness of the thinning area 213 is less than the thickness of the non-thinning area 214. By unevenly setting the thickness of the first slit portion 21, a part of the first slit portion 21 is non-thinned to ensure that the first slit portion 21 has good resilience; another part of the first slit portion 21 is thinned to reduce the resistance encountered by the control member 30 when squeezing the first slit portion 21 and inserting into the first slit portion 21.

[0099] See also Fig.13 , illustratively, the thinned area 213 is connected to the connecting portion 22 through the non-thinned area 214 .

[0100] It can be understood that the non-thinning area 214 refers to an area that has not been thinned.

[0101] Exemplarily, the thickness of the thinned area 213 ranges from 2 mm to 3 mm, such as 2 mm, 2.5 mm, 3 mm, or any other suitable value between 2 mm and 3 mm.

[0102] Exemplarily, the thickness of the non-thinned area 214 ranges from 4 mm to 6 mm, such as 4 mm, 5 mm, 6 mm, or any other suitable value between 4 mm and 6 mm.

[0103] It can be understood that within a certain range, as the number of sealing leaves 212 on the sealing structure 20 increases, the deformation ability of the sealing structure 20 and the ability to cover the intervening elements are enhanced, thereby improving the sealing effect. However, for the same sealing structure 20, the increase in the number of sealing leaves 212 means the increase in the number of first slits 211, that is, the size of a single sealing leaf 212 is reduced. Therefore, when there are too many slits on the first slit 211, the strength of the sealing structure 20 itself is reduced, the resilience is weakened, and the ability to cover the intervening elements is also reduced. Therefore, please refer to Fig.15 In some embodiments, the sealing structure 20 includes a first sealing layer 24 and a second sealing layer 25, wherein the first slit 211 is provided on the first sealing layer 24 and axially penetrates the first sealing layer 24; the second sealing layer 25 is coaxially provided with the first sealing layer 24, and the second sealing layer 25 is formed with a plurality of second slits 251, wherein the second slits 251 axially penetrate the second sealing layer 25, and the projection of the second slits 251 on the first sealing layer 24 does not overlap with the first slit 211. In the sealing structure 20 of this structure, the number of sealing leaves 212 increases but the size of a single sealing leaf 212 does not decrease, the first sealing layer 24 and the second sealing layer 25 have good mechanical strength, and during the use of the sealing structure 20, the first sealing layer 24 or the second sealing layer 25 is not likely to crack due to an excessive number of slits, resulting in a decrease in the sealing effect; the first sealing layer 24 and the second sealing layer 25 can well cover (or adhere to) the intervention element or the control element 30, thereby ensuring that the sealing valve 100 has a good sealing effect. The sealing structure 20 is divided into a first sealing layer 24 and a second sealing layer 25 , and the thickness of the first sealing layer 24 and the second sealing layer 25 is thinner than the overall thickness of the sealing structure 20 , which has the same effect as the thinning area 213 mentioned above, and can reduce the resistance of the control member 30 when sealing the structure 20 .

[0104] In some embodiments, the shape of the second slit 251 is the same as the shape of the first slit 211, so that the sealing structure 20 has a simple structure and is easy to process. In other embodiments, the shape of the second slit 251 includes a straight shape or a curved shape, etc., and the shape of the second slit 251 is different from the shape of the first slit 211.

[0105] In some embodiments, the number of the second slits 251 is the same as the number of the first slits 211, and the sealing structure 20 has a simple structure and is easy to process. In other embodiments, the number of the second slits 251 and the number of the first slits 211 may also be different.

[0106] In some embodiments, the first slit 211 and the second slit 251 have the same shape and number, and the preset centers of the first slit 211 and the second slit 251 coincide with each other in the axial direction. Fig.16 As shown, the projection of the second slit 251 on the first sealing layer 24 is deflected relative to the first slit 211 along the circumferential direction, and the deflection angle α is between [10°, 60°], such as 10°, 30°, 45°, 60° or any other suitable angle between 10° and 60°, so as to ensure that the sealing structure 20 has good mechanical strength and can cover the intervention element or control element 30 from more angles, thereby improving the sealing effect of the sealing valve 100. Fig.16 In the figure, for the convenience of observation, the second slit 251 is shown in dotted lines. The straight line L1 is a line connecting the preset center and the end of the first slit 211, and the straight line L2 is a line connecting the preset center and the end of the second slit 251 adjacent to the first slit 211. The angle α between the straight line L1 and the straight line L2 is the angle of the projection of the second slit 251 on the first sealing layer 24 relative to the first slit 211 in the axial direction.

[0107] See also Fig.15 In some embodiments, the sealing structure 20 further includes an intermediate layer 26, which is disposed between the first sealing layer 24 and the second sealing layer 25. The hardness of the first sealing layer 24 and the second sealing layer 25 is less than that of the intermediate layer 26. The intermediate layer 26 is formed with a third slit (not shown), which axially penetrates the intermediate layer, and the third slit can be connected to the first slit 211 and the second slit 251. The intermediate layer 26 can provide a better rebound effect, so that the first slit portion 21 is better attached to the outer wall of the intervening element. The provision of the third slit can reduce the insertion resistance when the intervening element or the control member 30 is inserted into the sealing structure 20.

[0108] Exemplarily, the number of the second slits 251 and the third slits can be designed according to actual needs, such as one, two, three, four, five, six, seven, eight or more.

[0109] Exemplarily, the third slit may overlap with the first slit 211 or may not overlap with the first slit 211 .

[0110] Exemplarily, the third slit may or may not overlap with the second slit 251 .

[0111] Exemplarily, the middle layer 26, the first sealing layer 24 and the second sealing layer 25 are connected by insert molding. In this way, the connection between the middle layer 26, the first sealing layer 24 and the second sealing layer 25 is reliable and stable.

[0112] Exemplarily, the first sealing layer 24 and the second sealing layer 25 have the same hardness or are made of the same material. Exemplarily, the material of the intermediate layer 26 includes at least one of the following: polytetrafluoroethylene (PTFE), polyoxymethylene (POM), and the like.

[0113] See also Fig.17 and Fig.18 In some embodiments, the sealing valve 100 includes two sealing structures 20, the two sealing structures 20 are coaxially arranged, the first slit portions 21 protrude in the axial direction, and the protruding directions of the first slit portions 21 of the two sealing structures 20 are opposite. The arrangement of the two sealing structures 20 can ensure that the sealing valve 100 has good mechanical strength on the one hand, and can improve the sealing effect of the sealing valve 100 on the other hand.

[0114] See also Fig.17 For example, the sealing structure 20 at the distal end protrudes toward the distal end, and the sealing structure 20 at the proximal end protrudes toward the proximal end. With this arrangement, the first slit 211 of the sealing structure 20 at the distal end is not easily deformed toward the proximal end and opened under the impact of blood when in a closed state, which effectively prevents blood leakage and improves the sealing effect. In addition, the sealing structure 20 at the distal end protrudes toward the distal end, and the sealing structure 20 at the proximal end protrudes toward the proximal end, and a hollow space can also be formed between the two sealing structures 20. The hollow space can provide a deformation space for the first slit portion 21 of the sealing structure 20 at the proximal end, so that the first slit portion 21 of the sealing structure 20 at the proximal end can be better attached to the control member 30 or the intervening element, effectively improving the sealing effect of the sealing valve 100.

[0115] See also Fig.18a In some embodiments, the first slits 211 include a plurality of straight slits 2113 and a plurality of curved slits 2114. In the axial direction of the sealing valve 100, the straight slits 2113 on one sealing structure 20 are opposite to the curved slits 2114 on another sealing structure 20. When the control member 30 or the intervening element is inserted into the sealing valve 100, at the same axial position, the control member 30 or the intervening element can be attached to the sealing leaf with curved edges and the sealing leaf with straight edges at the same time. The sealing leaves of different shapes can play a role of supplementary sealing for the control member 30 or the intervening element, thereby improving the overall sealing effect of the sealing valve 100.

[0116] See also Fig.19 and Fig. 20In some embodiments, the sealing valve 100 further comprises a sealing member 60, the sealing member 60 is formed with a hollow channel 61, the hollow channel 61 can be communicated with the first slit 211, the proximal end and the distal end of the hollow channel 61 are respectively formed with a first constriction 611 and a second constriction 612, the inner diameter of the first constriction 611 gradually decreases from the proximal end surface of the sealing member 60 to the distal end, the inner diameter of the second constriction 612 gradually decreases from the distal end surface of the sealing member 60 to the proximal end, and the connection between the first constriction 611 and the second constriction 612 is the part with the smallest inner diameter of the sealing member 60. The inclination of the wall surface of the second constriction 612 is smaller than the inclination of the wall surface of the first constriction 611, and the sealing member 60 is used to seal with the control member 30 of the sealing valve 100. The inclination of the wall surface of the second constriction 612 is smaller than the inclination of the wall surface of the first constriction 611, which is conducive to better discharge of air. In addition, the provision of the sealing member 60 can ensure that the sealing valve 100 has good mechanical strength on the one hand, and can improve the sealing effect of the sealing valve 100 on the other hand. Exemplarily, the wall surface of the hollow channel 61 is used to cooperate with the control member 30 in a sealing manner.

[0117] See also Figures 17 to 20 In some embodiments, the sealing structure 20 further includes a sealing ring 70. The sealing ring 70 is used to seal the contact between two sealing structures 20; or, the sealing ring 70 is used to seal the contact between the sealing structure 20 and the sealing member 60. The provision of the sealing ring 70 can improve the sealing effect of the sealing valve 100.

[0118] See also Fig.21 An embodiment of the present invention further provides a delivery system 1000, including a sheath tube 200, a three-way valve 300 and a sealing valve 100. The delivery system 1000 includes the sealing valve 100 of any one of the above embodiments, and the sheath tube 200 and the three-way valve 300 are both connected to the sealing valve 100.

[0119] Exemplarily, the sheath 200 includes a hollow tubular member with a lumen, the hollow tubular member being made of a material having good biocompatibility, and is used to establish a delivery channel in a blood vessel. The operator can inject liquid or gas into the delivery system through the three-way valve 300 to achieve the drainage or exhaust function of the delivery system.

[0120] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "mechanically coupled" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. The mechanical coupling or coupling of two components includes direct coupling and indirect coupling, for example, direct fixed connection, connection through a transmission mechanism, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0121] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0122] The disclosure above provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described above. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0123] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific method steps, features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific method steps, features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0124] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sealing valve for a conveying system, characterized in that: The sealing valve comprises: Valve seat; A sealing structure is disposed in the valve seat; the sealing structure comprises a first slit portion, the first slit portion is elastic, the first slit portion is formed with a first slit, and the shape of the first slit comprises a curved shape; A control member, the distal end of which extends into the valve seat and can be rotated toward the distal end of the valve seat under the action of an external force; the control member can squeeze the first slit portion within a moving stroke to switch the first slit from a closed state to an open state, and when the external force is removed, the elasticity of the first slit portion can cause the control member to rotate back, and the first slit can be switched from the open state to the closed state under the elastic force of the first slit portion.

2. The sealing valve according to claim 1, characterized in that: The number of the first slits includes multiple, the multiple first slits radiate outward from a preset center of the first slit portion, and the multiple first slits are spirally deflected in the same direction.

3. The sealing valve according to claim 2, characterized in that: After cutting by the first slit, a plurality of sealing leaves are formed on the first slit portion, and the sealing leaves partially overlap with the sealing leaves next to them.

4. The sealing valve according to claim 1, characterized in that: A groove is formed on the distal end surface of the sealing structure, and the groove is arranged around the first slit.

5. The sealing valve according to claim 1, characterized in that: The first slit portion includes a thinning area, the first slit is formed in the thinning area, and the thinning area is formed by a portion of the distal end surface of the first slit portion being recessed toward the proximal end surface of the first slit portion.

6. The sealing valve according to claim 1, characterized in that: The sealing structure comprises: a first sealing layer, wherein the first slit is provided in the first sealing layer and axially penetrates the first sealing layer; The second sealing layer is coaxially arranged with the first sealing layer, the second sealing layer is formed with a second slit, the second slit axially penetrates the second sealing layer, and a projection of the second slit on the first sealing layer does not overlap with the first slit.

7. The sealing valve according to claim 6, characterized in that: The sealing structure further comprises an intermediate layer, wherein the intermediate layer is disposed between the first sealing layer and the second sealing layer, and the hardness of the first sealing layer and the second sealing layer is smaller than the hardness of the intermediate layer; The middle layer is formed with a third slit, and the third slit axially penetrates the middle layer.

8. The sealing valve according to claim 1, characterized in that: The sealing valve comprises two sealing structures, the two sealing structures are coaxially arranged, the first slit portion protrudes along the axial direction, and the protruding directions of the first slit portions of the two sealing structures are opposite.

9. The sealing valve according to any one of claims 1 to 8, characterized in that: The sealing valve also includes a sealing member, which forms a hollow channel. The hollow channel is connected to the first slit, and the proximal end and the distal end of the hollow channel are respectively formed with a first constriction and a second constriction, and the inclination of the wall of the second constriction is smaller than the inclination of the wall of the first constriction. The sealing member is used to seal with the control member of the sealing valve.

10. The sealing valve according to claim 1, characterized in that: The sealing valve further comprises a knob, wherein the knob is fixedly connected to the control member; the knob is movably connected to the valve seat, and the inner circumference of the knob is provided with at least one protrusion.

11. The sealing valve according to claim 10, characterized in that: The outer circumferential surface of the valve seat is provided with a first circumferential groove and a second circumferential groove extending in the circumferential direction, the distal ends of the first circumferential groove and the second circumferential groove are flush, and the width of the second circumferential groove in the axial direction of the valve seat is greater than that of the first axial groove; one end of the first circumferential groove is connected to the second circumferential groove, and the other end of the first circumferential groove is a closed end; The first circumferential groove and the second circumferential groove move to provide a movable track for the protrusion of the knob.

12. A conveying system, characterized in that: include: Sheath; Three-way valve; as well as According to any one of claims 1 to 11, the sheath tube and the three-way valve are both connected to the sealing valve.

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