Valve conveyor

Abstract

According to the valve conveyor, the handle assembly and the knob assembly are arranged in the conveyor, the threaded clamping piece is arranged on the outer tube in the handle assembly, and the tee joint connected with the outer tube is arranged at the far end of the knob assembly, so that the threaded clamping piece drives the outer tube to linearly move from the far end to the near end by rotating the knob assembly; meanwhile, a tee joint in the knob assembly is driven to linearly move towards the near end, and finally the valve is released to a designated position; meanwhile, a limiting mechanism composed of a rear end connecting piece and a limiting gear rod is arranged in the rotary knob assembly, the tee joint can be limited at a specific position in the rotary knob assembly through the abutting effect between the limiting gear rod and the tee joint, the release degree of the valve in the valve release process is adjusted and controlled, the release position of the valve is conveniently adjusted and controlled in real time, and the valve release efficiency is improved. And the release accuracy of the valve is effectively improved. By means of the mode, the valve conveyor is simple in structure, convenient and fast to operate and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a valve conveyor. Background Art

[0002] The valve delivery device is a medical device used for valve replacement during surgical operations. During the valve replacement process, the valve delivery device can be used to directly release the valve to the lesion site through a catheter, eliminating the patient's pain during the operation.

[0003] In the prior art, a push-button artificial valve delivery device is disclosed in the patent application document with publication number CN112656547A, which includes a core shaft, an outer sheath, a screw, a first handle and a second handle, a screw is installed between the first handle and the second handle, the outer sheath is fixedly connected to the first handle, the core shaft is inserted into the outer sheath, the first handle and the second handle, the valve is loaded between the core shaft and the outer sheath, and a knob, a connecting tube and a push-button assembly are installed on the second handle. By turning the knob, the screw drives the first handle and the outer sheath to move toward the proximal end to achieve the positioning of the valve; by pressing the push-button assembly and pulling it toward the proximal end, the connecting tube drives the screw to move, and the first handle and the outer sheath are linked to move toward the proximal end to achieve the release of the valve. Although the delivery device in the above technical solution can achieve the precise release of the valve, the limiting structure involved is complex in structure and operation, and the screw is exposed to the outside, which is easy to be clamped by gloves, sheets, etc. during the operation, affecting the operation process.

[0004] In view of this, it is necessary to design an improved valve delivery device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a valve conveyor.

[0006] In order to achieve the above-mentioned utility model object, the utility model provides a valve delivery device, comprising:

[0007] A catheter, comprising an inner tube, a middle tube and an outer tube which are sequentially sleeved on the outer side of the inner tube, a valve installation unit being arranged at the distal end of the catheter, a threaded card being fixedly connected to the outer side of the outer tube, and a tee being fixedly connected to the proximal end of the outer tube;

[0008] An inner sheath, the inner sheath comprising an inner sheath tube, the inner sheath tube being sleeved on the outside of a portion of the outer tube;

[0009] A handle assembly is provided with the proximal end of the inline sheath, and the handle assembly is drivingly connected to the threaded card;

[0010] A knob assembly, close to the proximal end of the handle assembly, the middle tube extends into the knob assembly; the inner tube extends to the proximal end of the knob assembly; the tee is located in the knob assembly, and a limiting mechanism is provided at the proximal end of the knob assembly, the limiting mechanism includes a rear end connecting piece and a limiting lever, the limiting lever can rotate around its own axis and the distal end of the limiting lever can abut against the tee; the rear end connecting piece is provided with a third through hole for the limiting lever to pass through, and the limiting lever is provided with a plurality of protrusions at intervals in the axial direction, and the limiting lever can be fixed to the rear end connecting piece by using two adjacent protrusions.

[0011] Furthermore, the handle assembly includes a first base and a first shell connected to the first base, a first threaded tube is provided in the first shell, and a second stress diffusion tube is provided on the end of the first base away from the first shell; the first threaded tube forms a first guide rail, the extension direction of the first guide rail is the same as the extension direction of the outer tube, and the threaded card is slidably arranged in the first guide rail.

[0012] Furthermore, a first stopper and a second stopper are respectively provided at both ends of the first guide rail, and a first through hole for the outer tube to pass through is provided on the first stopper and the second stopper.

[0013] Furthermore, the inner sheath also includes a first stress diffusion tube arranged at the proximal end of the inner sheath tube and an inner sheath handle connected to the first stress diffusion tube; the inner sheath handle is provided with an inner sheath handle cover.

[0014] Furthermore, the sum of the outer diameters of the first protrusion at the proximal end of the limit lever and the limit lever is greater than the maximum outer diameter of the third through hole, the sum of the outer diameters of the remaining protrusions and the limit lever is less than the maximum outer diameter of the third through hole, and the distance between two adjacent protrusions is greater than the length of the third through hole along its own axial direction.

[0015] Furthermore, a second base is provided on one end of the first threaded tube close to the knob assembly, and a plurality of grooves are provided on the circumference of the second base; the knob assembly includes a knob and a base arranged at the proximal end of the knob, the knob includes a second shell and a knob base sleeved in the cavity of the second shell, the second shell is cylindrical, and a plurality of protrusions are provided on one side of the second shell close to the second base, and the protrusions are clamped in the grooves.

[0016] Furthermore, the proximal end of the second shell is connected to the rear end connector, and the proximal end of the rear end connector is connected to an infusion tube; the inner tube and the middle tube both extend into the base, and the inner tube passes through the rear end connector and is connected to the second Luer; the base includes a sleeve, and corresponding positions on the sleeve are respectively provided with a first hole, a second hole, and a third hole for the limit lever, the second Luer, and the infusion tube to pass through.

[0017] Furthermore, a third base is provided between the knob base and the second base, the third base is connected to the knob base, and a cavity is formed inside the knob base; a tee is provided on the side of the knob base close to the third base, the outer tube is connected to the tee, and a second through hole is provided in the tee for the middle tube to pass through; a first groove body for accommodating the infusion tube is provided in the tee, a second groove body is provided at the end of the first groove body, the second groove body is connected to the outer tube, and a sealing plug is provided in the second through hole; the liquid in the infusion tube flows into the cavity between the outer tube and the middle tube through the second groove body.

[0018] Furthermore, a second guide rail is formed in the knob base, the tee is slidably disposed in the second guide rail, and the second guide rail and the first guide rail extend in the same direction.

[0019] Furthermore, the valve installation unit includes a sealing cavity, the distal end of the inner tube extends to the outside of the middle tube, the distal end of the inner tube is provided with a first ring body, and the distal end of the middle tube is provided with a second ring body, the first ring body, the second ring body and part of the outer tube together constitute the sealing cavity, and the sealing cavity is used to accommodate the valve.

[0020] The beneficial effects of the utility model are:

[0021] 1. The valve delivery device provided by the utility model is provided with a handle assembly and a knob assembly in the delivery device, and a threaded card is provided on the outer tube in the handle assembly, and a tee connected to the outer tube is provided at the distal end of the knob assembly, so that the threaded card drives the outer tube to move linearly from the distal end to the proximal end by rotating the knob assembly, and at the same time drives the tee in the knob assembly to move linearly toward the proximal end, and finally releases the valve to a specified position; at the same time, by providing a limiting mechanism composed of a rear end connector and a limiting lever in the knob assembly, the tee can be limited to a specific position in the knob assembly by utilizing the abutment between the limiting lever and the tee, and then the outer tube is limited to a specific position, so that the opening and closing of the sealing cavity for accommodating the valve at the distal end of the catheter can be regulated as needed, so as to regulate the release degree of the valve during the valve release process, facilitate the real-time regulation of the release position of the valve, and effectively improve the release accuracy of the valve. In the above process, the setting of the limiting mechanism can not only improve the release accuracy of the valve, but also effectively solve the influence of the limiting mechanism being exposed and set outside on the surgical process in the prior art.

[0022] 2. The valve conveyor provided by the utility model forms a first guide rail and a second guide rail for the threaded card and the tee to move linearly in the handle assembly and the rotating assembly respectively, and the first guide rail and the second guide rail can be used to guide the threaded card and the tee, so that when the knob assembly is rotated, the threaded card moves toward the rear end with the outer tube, and the first stopper and the second stopper are used to limit the movement of the threaded card in the above-mentioned rails; by providing a passage connected between the outer tube, the tee and the infusion tube, and providing a second Luer at one end of the inner tube, the air in the outer tube and the inner tube can be discharged to prevent the air in the conveyor from affecting the human body; by providing a plurality of protrusions on the limit lever, the relative position between the protrusion and the third through hole can be changed by rotating the limit lever, and the limit lever can be fixed to the rear end connector by using adjacent protrusions, and then the tee can be limited by the abutment between the limit lever and the tee, so as to adjust the release degree of the valve, so as to adjust the valve release process in real time according to the release position, and effectively improve the accuracy of the valve release. Through the above method, a valve delivery device with simple structure, convenient operation and strong practicality is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the valve delivery device proposed by the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0025] Figure 3 for Figure 2 A cross-sectional view of the valve mounting unit in the cross-sectional view along line AA of FIG.

[0026] Figure 4 for Figure 2 A cross-sectional view of the inner sheath in the AA line cross-sectional view;

[0027] Figure 5 for Figure 2 A cross-sectional view of the handle assembly and the knob assembly in the AA line cross-sectional view;

[0028] Figure 6 for Figure 2 A structural diagram of a local structure;

[0029] Figure 7 for Figure 6 Schematic diagram of the local structure;

[0030] The reference numerals are as follows:

[0031] 100, valve delivery device; 10, valve installation unit; 11, inner tube; 111, first ring body; 12, middle tube; 121, second ring body; 13, outer tube; 20, inner sheath; 21, inner sheath tube; 22, first stress diffusion tube; 23, inner sheath handle; 24, inner sheath handle cover; 30, handle assembly; 31, first base; 32, first shell; 33, second stress diffusion tube; 34, first threaded tube; 341, limit rod; 3 42. Threaded card; 3411. First stopper; 3412. Second stopper; 35. Second base; 40. Knob assembly; 41. Knob; 411. Second shell; 412. Knob base; 413. Third base; 414. Tee; 415. Sealing plug; 42. Base; 421. Bushing; 422. Rear connector; 423. Second Luer; 43. Infusion tube; 44. First Luer; 45. Limit lever; 451. Handle. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0034] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0035] See also Figures 1 to 7 As shown, the valve delivery device 100 provided by the utility model includes a catheter and a valve installation unit 10, an inner sheath 20, a handle assembly 30 and a knob assembly 40 arranged outside the catheter, and the valve installation unit 10 is arranged at the distal end of the catheter; the catheter includes an inner tube 11 and a middle tube 12 and an outer tube 13 which are sequentially sleeved on the outside of the inner tube 11, the middle tube 12 extends into the knob assembly 40, and the inner tube 11 extends to the proximal end of the knob assembly 40; a threaded card 342 is provided in the handle assembly 30, which is fixedly connected to the outside of the outer tube 13, and a tee 414 is provided in the knob assembly 40, which is fixedly connected to the proximal end of the outer tube 13; a limit lever 45 is provided in the knob assembly 40, and the end of the knob assembly 40 is connected to the limit lever 45 and the infusion tube 43.

[0036] For further information, see Figure 3 , and combined with Figure 1 and Figure 2 As shown, the valve installation unit 10 is arranged at the distal end of the catheter, and the valve installation unit 10 includes a sealed cavity. The catheter includes an inner tube 11 and a middle tube 12 and an outer tube 13 which are sequentially sleeved on the outside of the inner tube 11, and the lengths of the inner tube 11, the middle tube 12 and the outer tube 13 meet the following conditions: inner tube>middle tube>outer tube, and all three are hollow tubes. The outer tube 13 extends to the handle assembly 30, and the middle tube 12 extends to the knob assembly 40; the end of the inner tube 11 is provided with a first ring body 111, and one end of the middle tube 12 close to the end of the inner tube 11 is provided with a There is a second ring body 121, and the first ring body 111, the second ring body 121 and the part of the outer tube 13 close to the two together constitute the above-mentioned sealing cavity, which is used to provide a space for accommodating the valve for the valve installation unit 10; in particular, in order to facilitate the installation of the valve into the sealing cavity, a flexible tube body with certain support is selected as the outer tube 13, such as a tube body formed by polymer-coated metal wire. The material of the outer tube 13 here can be selected according to needs, as long as the valve can be installed, and this is not limited here.

[0037] For further information, see Figure 4 , and combined with Figure 1 and Figure 2As shown, the inner sheath 20 includes an inner sheath tube 21, a first stress diffusion tube 22 arranged at the proximal end of the inner sheath tube 21, and an inner sheath handle 23 connected to the first stress diffusion tube 22. The inner sheath tube 21 is sleeved on the outside of a portion of the outer tube 13, and the distal end of the inner sheath handle 23 is connected to the first stress diffusion tube 22, and the proximal end is connected to the inner sheath handle cover 24. By providing the inner sheath 20, when the valve is delivered to the human body, the inner sheath tube 21 in the inner sheath 20 can be used to prevent the outer tube 13 from directly contacting the human body, so as to avoid secondary damage caused by friction caused by the movement of the outer tube to the human body when the valve is delivered. Exemplarily, the first stress diffusion tube 22 is connected to the inner sheath handle 23 in a buckle manner. In other embodiments, the first stress diffusion tube 22 and the inner sheath handle 23 can also be connected in other ways, such as threaded connection, etc., as long as the purpose of the present application can be achieved, and this is not limited here. In particular, in order to make the connection between the inner sheath handle 23 and the inner sheath handle cover 24 tighter, a sealing ring (not numbered in the figure) is provided in the gap formed between the two. It should be noted that the proximal end in the text refers to the end close to the operator during the valve delivery process, and correspondingly, the distal end refers to the end away from the operator.

[0038] For further information, see Figures 5 to 7 , and combined with Figure 1 and Figure 2As shown, the handle assembly 30 is transmission connected with the threaded card, and the handle assembly 30 includes a first base 31 and a first shell 32 connected to the first base 31. A first threaded tube 34 is provided in the first shell 32, and the inner wall of the first threaded tube 34 is ringed with threads (not shown in the figure). A second stress diffusion tube 33 is provided at one end of the first base 31 away from the first shell 32, and a first guide rail (not numbered in the figure) is formed in the first threaded tube 34. The extension direction of the first guide rail is the same as the extension direction of the outer tube 13. The threaded card 342 is slidably arranged in the first guide rail, and a first stop block 3411 and a second stop block 3412 are respectively provided at both ends of the first guide rail. The first stop block 3411 and the second stop block 3412 are provided with a first through hole (not numbered in the figure) for the outer tube 13 to pass through. The first base 31 is fixedly connected to the first stop block 3411, and the threaded card 342 is fixedly arranged on the outside of the outer tube 13. Through the above arrangement, after the knob assembly 40 is rotated, driven by the knob assembly 40 and blocked by the first stopper 3411 and the second stopper 3412, and because the threaded card 342 is fixedly connected to the outer tube, the threaded card 342 can move linearly from the distal end to the proximal end along the first guide rail, and drive the outer tube 13 to move linearly from the distal end to the proximal end. Exemplarily, the above-mentioned first guide rail is formed by two relatively arranged limit rods 341, which are arranged at intervals to form a first guide rail for the sliding movement of the threaded card 342, the setting direction of the first guide rail is the extension direction of the outer tube 13, and the first stopper 3411 and the second stopper 3412 are respectively arranged at both ends of the first guide rail, and the two stops are provided with a first through hole for the outer tube 13 to pass through. In other embodiments, the first guide rail can also be arranged in other structures as long as the corresponding functions can be achieved.

[0039] Furthermore, the proximal end of the handle assembly 30 is connected to the knob assembly 40, and one end of the first threaded tube 34 close to the knob assembly 40 protrudes in the radial direction to form a disc-shaped second base 35, and the second base 35 is provided with a plurality of grooves (not shown in the figure) in the circumference; specifically, the knob assembly 40 is arranged at the proximal end of the handle assembly 30, including a knob 41 and a base 42 arranged at the proximal end of the knob 41, the knob 41 includes a second shell 411 and a knob base 412 sleeved in the inner cavity of the second shell 411, the proximal end of the first shell 32 is sleeved on the outside of the distal end of the second shell 411, and the two are only in contact with each other and do not They are connected to each other, one end of the second shell 411 is connected to the third base 413, and the other end is connected to the base 42. The second shell 411 is cylindrical, and a plurality of protrusions (not numbered in the figure) are provided on the side of the second shell 411 close to the third base 413. The protrusions can be clamped in the grooves of the second base 35. By adopting this arrangement, not only the second shell 411 can be fixed, but also when the second shell 411 is rotated, the clamping action between the second shell 411 and the second base 35 can be utilized to drive the first threaded tube 34 to rotate, thereby driving the threaded card 342 to drive the outer tube 13 to move linearly.Specifically, along the axial direction of the outer tube, a third base 413 is provided between the knob base 412 and the second base 35, the third base 413 is connected to the knob base 412, and a cavity is formed inside the knob base 412; a tee 414 is provided on one side of the knob base 412 close to the third base 413, and a second through hole for the middle tube 12 to pass through is provided in the tee 414, and a second guide rail (not numbered in the figure) is formed inside the knob base 412, and the tee 414 is provided with a sliding device. The outer tube 13 is placed in the second guide rail, and the second guide rail extends in the same direction as the first guide rail. In some embodiments, the two are arranged on the same straight line for ease of operation. The tee 414 is fixed to the outside of the outer tube 13, and the tee 414 can move in the second guide rail. The outer tube 13 extends to the tee 414 and is connected to the tee 414. The tee 414 is provided with a second through hole (not numbered in the figure) for the inner tube 11 to pass through, and a sealing plug is provided in the second through hole; the tee 414 is also connected to the inner tube 11. The infusion tube 43 is parallel to the tube 11, one end of the infusion tube 43 is connected to the tee 414, and the other end is connected to the first Luer 44, the first Luer 44 is used to transport liquid into the infusion tube 43, and the end of the tee 414 away from the handle assembly 30 is also provided with a sealing plug 415, so as to make the tee 414 and the outer tube 13 tightly connected, thereby preventing the liquid flowing from the infusion tube 43 from flowing out of the tee 414; the tee 414 is provided with a first groove body ( The second groove body is connected to the outer tube 13 so as to facilitate the communication between the infusion tube 43 and the outer tube 13. Before use, the first Luer 44 can be used to transport liquid into the infusion tube 43. The liquid enters the outer tube 13 through the first groove body and the second groove body, flows along the cavity between the outer tube 13 and the middle tube, and finally flows out from the far end of the outer tube 13, thereby achieving the purpose of exhausting the air inside the outer tube 13.

[0040] Furthermore, the base 42 includes a sleeve 421 and a rear end connector 422 connected to the proximal end of the second shell 411, the proximal end of the rear end connector 422 is connected to the infusion tube 43, the inner tube 11 and the middle tube 12 extend into the base 42 together, a third through hole (not numbered in the figure) of a special shape is provided in the rear end connector 422, the third through hole is used for the limit lever 45 to pass through, the limit lever 45 and the rear end connector 422 together constitute a limit mechanism, the inner tube 11 passes through the rear end connector 422 and is connected to the second Luer 423, the inner tube 11 and the second Luer 423 are connected by a pipeline or other means, and the corresponding positions on the sleeve 421 are also respectively provided with a first hole (not numbered in the figure), a second hole (not numbered in the figure) and a third hole (not numbered in the figure) for the limit lever 45, the second Luer 423, and the infusion tube 43 to pass through; the infusion tube 43 passes through the rear end connector 422 and extends to the first trough body. The limit lever 45 is provided with a number of protrusions (not shown in the figure) at intervals along its axial direction. Along the height direction of the protrusions (i.e., the length of the protrusions protruding from the limit lever), the sum of the outer diameters of the first protrusion at the proximal end of the limit lever 45 and the limit lever 45 is greater than the maximum outer diameter of the third through hole, and the sum of the outer diameters of the remaining protrusions and the limit lever 45 is less than the maximum outer diameter of the third through hole.

[0041] Since the sum of the first protrusion at the proximal end of the limit lever 45 and the outer diameter of the limit lever 45 is greater than the maximum outer diameter of the third through hole, the abutment between the first protrusion at the proximal end of the limit lever 45 and the rear end connecting piece 422 can be utilized to prevent the limit lever 45 from passing through the third through hole and moving toward the distal end without restriction, and the limit lever 45 cannot escape from the rear end connecting piece 422.

[0042] Since the sum of the outer diameters of the remaining protrusions and the limiting lever 45 is smaller than the maximum outer diameter of the third through hole, when the position of the limiting lever 45 needs to be changed, the limiting lever 45 can be pulled to make at least one of the remaining protrusions pass through the third through hole. At this time, the limiting lever 45 moves relative to the rear end connecting piece 422 to adjust the distance between the distal end of the limiting lever 45 and the tee 414; since the third through hole is a special-shaped hole, its aperture has a larger and smaller part, when the limiting lever 45 moves to the target position, the limiting lever 45 is rotated to make The protrusion thereon deviates from the opening of the third through hole with the largest aperture, which can prevent the limit lever 45 from being displaced again and being limited on the rear end connector 422. Subsequently, when the outer tube drives the tee 414 to move proximally until it abuts against the limit lever 45, it can no longer move proximally, thereby limiting the tee 414 to a specific position in the knob assembly 40. Since the tee 414 is fixedly connected to the proximal end of the outer tube, the outer tube 13 is limited to a specific position, and the valve at its distal end is also limited to a specific position before it can be released.

[0043] In addition, along the axial direction of the limiting lever 45, the distance between two adjacent protrusions is greater than the axial length of the third through hole, so that the two protrusions can be respectively located at both ends of the third through hole, so that the limiting lever 45 is limited on the rear end connecting piece 422 by the two adjacent protrusions.

[0044] It should be noted that the protrusions can be arranged at equal intervals or at non-equal intervals as required, and the number of protrusions can also be set as required, such as 2, 3, 4, etc. The specific setting method can be adjusted as required, as long as the corresponding purpose can be achieved, and is not limited here. In particular, in some embodiments, a handle 451 is also provided at the end of the limit lever 45 to facilitate rotating or pulling the limit lever 45.

[0045] It is worth mentioning that the first Luer 44 and the second Luer 423 involved in the present application are both commonly used medical equipment structures, and their function is to transport liquid to the infusion tube 43 and the inner tube 11. As long as the above purpose can be achieved, there is no restriction on the structure of the first Luer 44 and the second Luer 423 here.

[0046] In other embodiments, the structure of the limit lever 45 can also be arranged in other ways, such as setting a plurality of holes on the limit lever 45, and the knob assembly 40 is provided with a pin that can penetrate the second shell 411 and the holes. By changing the corresponding position of the hole into which the pin is inserted on the limit lever 45, the distance between the far end of the rear end connecting member 422 and the far end of the limit lever 45 on the limit lever 45 can be changed to achieve the purpose of limiting. It should be noted that in other embodiments, the structure of the limit lever 45 is not limited to the aforementioned methods, as long as the distance between the far end of the limit lever 45 and the far end of the rear end connecting member 422 can be changed, and no limitation is made here.

[0047] The working principle of the utility model is as follows: when it is necessary to use the valve delivery device proposed by the utility model to deliver the valve, the valve is first installed in the delivery device outside the human body, and the valve installation is carried out in the following manner: hold the handle assembly 30 with one hand, hold the knob assembly 40 with the other hand and rotate the knob assembly 40, the second shell 411 rotates around its own axis, and under the drive of the second shell 411, the first threaded tube 34 is driven to rotate by utilizing the engagement between the second shell 411 and the groove on the second base 35 of the first threaded tube 34. At this time, due to the setting of the limit rod 341, the threaded card 342 is restricted from rotating around the outer tube 13 and can only move linearly along the first guide rail. In this process, since the threaded card 342 is fixedly connected to the outer tube 13, the threaded card 342 will drive the outer tube 13 to move toward the proximal end during the linear motion, and the distal end of the outer tube 13 is away from the first ring body 111, and the closed space of the sealing cavity is opened. At this time, the valve can be installed to the corresponding position of the sealing cavity. After the installation is completed, the knob assembly 40 is rotated in the opposite direction, and as the outer tube 13 moves toward the distal end, the enclosed space of the sealed cavity is closed. Next, the conveyor with the valve installed is delivered to the human body, and when it reaches the designated release position, the knob assembly 40 is rotated, and the second shell 411 rotates around its own axis. Driven by the second shell 411, the first threaded tube 34 is driven to rotate by the engagement between the second shell 411 and the first threaded tube 34. At this time, due to the setting of the limit rod 341, the threaded card 342 is restricted from rotating around the outside of the outer tube 13, and because the threaded card 342 is fixedly connected to the outer tube 13, the threaded card 342 can drive the outer tube 13 to move toward the proximal end, and the distal end of the outer tube 13 is away from the first ring body 111, and the valve is released to the designated position.

[0048] During the above-mentioned release process, the release degree of the valve can also be regulated in the following manner to achieve precise release. The method for regulating the release degree of the valve is as follows: push the limit lever 45 toward the distal end. During the pushing process, at least one of the remaining protrusions except the first protrusion at the proximal end passes through the third through hole, thereby changing the distance between the distal end of the limit lever 45 and the rear end connector 422 along the axial direction of the outer tube. When the distance between the two is adjusted to a suitable position, rotate the limit lever 45 so that the remaining protrusions except the first protrusion at the proximal end cannot pass through the third through hole, so that the protrusion abuts against the rear end connector 422, and the limit lever 45 is restricted on the rear end connector 422. At this time, the exposure degree of the sealing cavity can be adjusted, and then the release degree of the valve can be adjusted; when it is found that the release position of the valve is wrong or the release is inaccurate, the limiting lever 45 can be rotated in the opposite direction to release the limiting effect of the protrusion thereon on the tee 414, and the knob assembly 40 can be rotated in the opposite direction. Driven by the second shell 411, the first threaded tube 34 rotates, and under the guidance of the first guide rail formed by the two limiting rods 341, the threaded card 342 moves toward the side close to the valve installation unit 10, prompting the outer tube 13 to move toward the distal end, and the valve is recovered into the sealing cavity. When the position where the valve needs to be released is repositioned, the operation of releasing the valve is implemented again.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A valve delivery device, characterized in that: include: A catheter, comprising an inner tube, a middle tube and an outer tube which are sequentially sleeved on the outer side of the inner tube, a valve installation unit being arranged at the distal end of the catheter, a threaded card being fixedly connected to the outer side of the outer tube, and a tee being fixedly connected to the proximal end of the outer tube; An inner sheath, the inner sheath comprising an inner sheath tube, the inner sheath tube being sleeved on the outside of a portion of the outer tube; A handle assembly, close to the proximal end of the inner sheath, the handle assembly being drivingly connected to the threaded card; A knob assembly is arranged at the proximal end of the handle assembly, and the middle tube extends into the knob assembly; the inner tube extends to the proximal end of the knob assembly; the tee is located in the knob assembly, and a limiting mechanism is provided at the proximal end of the knob assembly, and the limiting mechanism includes a rear end connecting piece and a limiting lever, the limiting lever can rotate around its own axis and the distal end of the limiting lever can abut against the tee; the rear end connecting piece is provided with a third through hole for the limiting lever to pass through, and the limiting lever is provided with a plurality of protrusions at intervals in the axial direction, and the limiting lever can be fixed to the rear end connecting piece by using two adjacent protrusions.

2. The valve delivery device according to claim 1, characterized in that: The handle assembly includes a first base and a first shell connected to the first base, a first threaded tube is provided in the first shell, and a second stress diffusion tube is provided on the end of the first base away from the first shell; the first threaded tube forms a first guide rail, the extension direction of the first guide rail is the same as the extension direction of the outer tube, and the threaded card is slidably arranged in the first guide rail.

3. The valve delivery device according to claim 2, characterized in that: A first stopper and a second stopper are respectively disposed at two ends of the first guide rail, and a first through hole for the outer tube to pass through is disposed on the first stopper and the second stopper.

4. The valve delivery device according to claim 1, characterized in that: The inner sheath also includes a first stress diffusion tube arranged at the proximal end of the inner sheath tube and an inner sheath handle connected to the first stress diffusion tube; the inner sheath handle is provided with an inner sheath handle cover.

5. The valve delivery device according to claim 1, characterized in that: The sum of the outer diameters of the first protrusion at the proximal end of the limit lever and the limit lever is greater than the maximum outer diameter of the third through hole, the sum of the outer diameters of the remaining protrusions and the limit lever is less than the maximum outer diameter of the third through hole, and the distance between two adjacent protrusions is greater than the length of the third through hole along its own axial direction.

6. The valve delivery device according to claim 2, characterized in that: A second base is provided on one end of the first threaded tube close to the knob assembly, and a plurality of grooves are provided on the circumference of the second base; the knob assembly includes a knob and a base arranged at the proximal end of the knob, the knob includes a second shell and a knob base sleeved in the cavity of the second shell, the second shell is cylindrical, and a plurality of protrusions are provided on one side of the second shell close to the second base, and the protrusions are stuck in the grooves.

7. The valve delivery device according to claim 6, characterized in that: The proximal end of the second shell is connected to the rear end connector, and the proximal end of the rear end connector is connected to an infusion tube; the inner tube and the middle tube both extend into the base, and the inner tube passes through the rear end connector and is connected to the second Luer; the base includes a sleeve, and corresponding positions on the sleeve are respectively provided with a first hole, a second hole, and a third hole for the limit lever, the second Luer, and the infusion tube to pass through.

8. The valve delivery device according to claim 7, characterized in that: A third base is provided between the knob base and the second base, the third base is connected to the knob base, and a cavity is formed inside the knob base; a tee is provided on one side of the knob base close to the third base, the outer tube is connected to the tee, and a second through hole is provided in the tee for the middle tube to pass through; a first groove body for accommodating the infusion tube is provided in the tee, a second groove body is provided at the end of the first groove body, the second groove body is connected to the outer tube, and a sealing plug is provided in the second through hole; the liquid in the infusion tube flows into the cavity between the outer tube and the middle tube through the second groove body.

9. The valve delivery device according to claim 7, characterized in that: A second guide rail is formed in the knob base, the three-way slidably arranged in the second guide rail, and the second guide rail and the first guide rail extend in the same direction.

10. The valve delivery device according to claim 1, characterized in that: The valve installation unit includes a sealing cavity, the distal end of the inner tube extends to the outside of the middle tube, the distal end of the inner tube is provided with a first ring body, and the distal end of the middle tube is provided with a second ring body. The first ring body, the second ring body and part of the outer tube together constitute the sealing cavity, and the sealing cavity is used to accommodate the valve.

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