Valve pressing and holding mechanism

Abstract

The utility model discloses a valve pressing and holding mechanism which comprises a plurality of pressing and holding petals which are arranged in the circumferential direction and provided with coupling ends close to the circle center. The coupling ends of the pressing and holding petals are coupled to define a pressing and holding hole. The pressing and holding petals are clamped between the two parallel radial moving devices, and the pressing and holding petals slide in the radial direction through the radial moving devices so that the pressing and holding holes can be shrunk; the pressing and holding valve is characterized in that a pressing and holding groove is formed in the first side face of each pressing and holding valve, a pressing and holding protruding block is arranged on the second side face, opposite to the first side face, of each pressing and holding valve, and the pressing and holding protruding blocks of the pressing and holding valves are embedded into the pressing and holding grooves of the adjacent pressing and holding valves. In the pressing and holding process, the pressing and holding groove of each pressing and holding flap is embedded into the pressing and holding convex block of the adjacent pressing and holding flap, so that the pressing and holding flaps are always kept on the same plane in the radial sliding process and do not axially move, and therefore valve damage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a valve pressing and gripping mechanism. Background Art

[0002] Transcatheter aortic valve implantation, as the third mode after surgical aortic valve replacement and drug treatment, is a minimally invasive technology using a cardiac catheter, which has the characteristics of no need for thoracotomy, less trauma, short operation time, and quick patient recovery. TAVI technology inserts an interventional catheter through the femoral artery to deliver the heart valve to the aortic valve area for opening.

[0003] Today's heart valves are becoming more and more sophisticated, so the requirements for the crimping mechanism are also getting higher and higher, especially in the later stages of valve crimping, the crimping shape of the valve will change due to its own structure, and it needs to be observed repeatedly during loading. Therefore, the document of Chinese Patent Application No. CN2020100998723 discloses a crimping machine, which has a number of circumferentially arranged crimping flaps, a crimping disk and a panel clamped on both sides of the crimping flap. This crimping machine inserts the valve to be loaded into the coupling circular hole at the coupling end of the crimping flap, so that the crimping of the valve can be well observed. However, in a crimping machine with this structure, each crimping flap can move relative to each other in the axial direction during the crimping process. At this time, the valve is subjected to a large crimping force, and the moving conveyor and the crimping mechanism will cause scratches or distortion of the valve. Therefore, it is necessary to improve it. Utility Model Content

[0004] The utility model aims to solve the technical problem that the crimping valve in the crimping machine in the prior art document CN2020100998723 can move axially during the crimping process, and aims to provide a novel valve crimping mechanism.

[0005] The valve pressing and gripping mechanism of the utility model comprises:

[0006] A plurality of crimping petals arranged along the circumferential direction, each crimping petal having a coupling end close to the center of the circle; the coupling ends of the plurality of crimping petals are coupled to form a crimping hole;

[0007] Two parallel radial moving devices, the crimping petal is sandwiched between the two parallel radial moving devices, and the crimping petal is slid radially by the radial moving devices to reduce the crimping hole;

[0008] The first side of the crimping flap has a crimping groove, and the second side of the crimping flap opposite to the first side has a crimping protrusion. The crimping protrusion of the crimping flap is embedded in the crimping groove of the adjacent crimping flap, so that several crimping flaps arranged along the circumferential direction always remain in the same plane during radial sliding.

[0009] Preferably, the crimping groove is provided on the first side of the crimping petal close to the coupling end;

[0010] The crimping protrusion is arranged on the second side of the crimping petal close to the coupling end.

[0011] Preferably, the third side surface and the fourth side surface of the pressing and gripping petal are provided with sliding columns respectively;

[0012] The inner side surfaces of the two parallel radial moving devices are respectively provided with spiral grooves, and the sliding posts on the third side surface and the fourth side surface of the pressing and gripping petal are respectively slidably arranged in the spiral grooves on the two parallel radial moving devices.

[0013] Preferably, the radial moving device comprises:

[0014] A pressing and gripping sub-disc, arranged on both sides of the pressing and gripping petal;

[0015] The panel sub-disc is arranged on both sides of the pressing and gripping sub-disc, and the spiral groove is arranged on the panel sub-disc.

[0016] Preferably, the pressing and gripping sub-disc is provided with a radial sliding block long hole, and the sliding column on the pressing and gripping petal passes through the radial sliding block long hole of the pressing and gripping sub-disc and is slidably disposed in the spiral groove.

[0017] Preferably, the slide post has a slider near the pressure grip flap;

[0018] The slider on the pressing and gripping petal is slidably embedded in the radial slider long hole of the pressing and gripping sub-disc.

[0019] Preferably, the valve crimping mechanism has two first radial limit members respectively arranged on the third side and the fourth side of the crimping flap and second radial limit members respectively arranged on the crimping sub-disc, the first radial limit members and the second radial limit members cooperate with each other to enable the radial moving device to slide the crimping flap radially, and the second radial limit member is arranged parallel to the long hole of the radial slider.

[0020] Preferably, the first radial limiting member is a radial limiting groove, the second radial limiting member is a radial limiting convex strip, and the radial limiting convex strip is slidably arranged in the radial limiting groove;

[0021] or,

[0022] The first radial limiting member is a radial limiting convex strip, the second radial limiting member is a radial limiting groove, and the radial limiting convex strip is slidably disposed in the radial limiting groove.

[0023] Preferably, the crimping flap has a flap circumferential end away from the center of the circle, and the sliding column is arranged on the third side surface and the fourth side surface of the crimping flap close to the flap circumferential end.

[0024] Preferably, the coupling end of the crimping petal has a tip which forms a certain angle with the radial direction, and a plurality of tips of the crimping petals are coupled to form a crimping hole.

[0025] Preferably, the spiral groove is an Archimedean spiral groove centered at the center of the grip hole.

[0026] Preferably, the crimping and gripping petals have n groups, and the spiral grooves have n strips, wherein n is 1-6.

[0027] Preferably, each group of crimping petals has m crimping petals, where m is 2-6.

[0028] Preferably, the valve crimping mechanism has:

[0029] A handle extends from an edge of the radial movement device.

[0030] Preferably, the handle extends from a disk edge of a pressure-gripping sub-disk of the radial moving device, and / or extends from a disk edge of a panel sub-disk of the radial moving device.

[0031] Preferably, the center of the radial moving device has a central hole, and a light mirror is provided on the hole wall of the central hole.

[0032] Preferably, the valve crimping mechanism further comprises:

[0033] A base, wherein the radial moving device is arranged on the base.

[0034] Preferably, the valve crimping mechanism further comprises:

[0035] A scale, wherein the scale is arranged along a circumferential circle on the outer side wall of the panel sub-disk of the radial moving device;

[0036] A pointer is fixed on the pressure-grip dividing plate, and the pointer corresponds to different scales.

[0037] Preferably, the valve crimping mechanism further comprises:

[0038] A reinforcement ring, which is arranged on the center hole of the panel sub-disk of the radial moving device, and which connects the pressure-gripping sub-disk and the panel sub-disk. The reinforcement ring is rotatably connected to the pressure-gripping sub-disk and / or the panel sub-disk.

[0039] The positive and progressive effects of the utility model are:

[0040] 1) The utility model provides a pressing and gripping groove on the first side of the pressing and gripping flap and a pressing and gripping protrusion on the second side. During the pressing and gripping process, the pressing and gripping protrusion of each pressing and gripping flap is embedded in the pressing and gripping groove of the adjacent pressing and gripping flap, so that the pressing and gripping flaps always remain in the same plane during the radial sliding process and will not move axially, thereby avoiding valve damage.

[0041] 2) The utility model provides an optical mirror on the wall of the center hole of the disk, and the valve morphology at the outer end of the grip hole can be directly observed through the reflection of the optical mirror, without the need to repeatedly bend down to observe, thereby reducing the risk of contaminating the operating table.

[0042] 3) The utility model sets a slider near the gripping petal on the slide column, and sets a radial slider long hole on the gripping sub-disc. During the gripping process, the slider slides in the radial slider long hole, and the slider bears the torsion force of the gripping sub-disc on the gripping petal. The slide column slides in the spiral groove, and bears the force of the spiral groove. The force positions of the slider and the slide column are independent of each other, which is conducive to the stable movement of the gripping petal. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figures 1A to 1C It is a three-dimensional structural schematic diagram of the valve pressing and gripping mechanism of the utility model;

[0044] Figure 2A-2B It is a three-dimensional exploded schematic diagram of the valve pressing and gripping mechanism of the utility model;

[0045] Figure 3A-3B It is a three-dimensional structural diagram of the pressing and gripping plate 22 of the present invention;

[0046] Figures 4A to 4D It is a schematic structural diagram of the pressing and gripping flap 10 of the present invention. DETAILED DESCRIPTION

[0047] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] It should be noted that the following embodiments and features therein may be combined with each other if there is no conflict.

[0049] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" or "second" features may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" or "a number" is two or more, unless otherwise clearly and specifically defined.

[0050] The "radial direction" in the present invention refers to the approximate radial direction of the crimping flap itself, that is, the direction of the line connecting the coupling end 15 of the crimping flap and the circumferential end 16 of the crimping flap, rather than the exact radial direction of the crimping flap. These "radial directions" include but are not limited to "radial movement", "radial sliding", "first radial stopper", and "second radial stopper".

[0051] like Figure 1A , Figure 1B , Figure 2A and Figure 2B As shown, in this example, the valve crimping mechanism of the utility model includes a plurality of crimping flaps 10 and two parallel radial moving devices 20. Among them, the plurality of crimping flaps 10 are arranged along the circumferential direction and sandwiched between the two parallel radial moving devices 20, and the radial moving device 20 is a disc-shaped structure.

[0052] In this example, if Figures 4A to 4D As shown, the crimping flap 10 is a generally long block-shaped structure, and a plurality of crimping flaps 10 are arranged in a circumferential direction, so that a center of a circle is formed in the middle of the plurality of crimping flaps 10, and the end of the crimping flap 10 close to the center of the circle is a coupling end 15. The coupling end 15 has a radial section 151 and a tip 152. The tips 152 of the coupling ends 15 of the plurality of crimping flaps are coupled to form a crimping hole 30, and the valve is inserted into the crimping hole 30 to crimp the valve and load it into the valve delivery device. The tip 152 of the coupling end 15 of the crimping flap 10 is shaped as follows: Figure 4B and 4C As shown. The radial section 151 of the coupling end 15 forms a certain angle with the tip 152. The tips 152 of the plurality of crimping flaps 10 are coupled to form a crimping hole 30. The crimping hole 30 is reduced by sliding the crimping flap 10 radially by the radial moving device 20. When the valve needs to be crimped, the valve is passed through the crimping hole 30. The crimping flap 10 slides radially by the radial moving device 20 to reduce the crimping hole 30, and then the valve is crimped.

[0053] Continue as Figures 4B to 4DAs shown, the crimping petal 10 has a first side surface 11, a second side surface 12, a third side surface 13 and a fourth side surface 14. The first side surface 11 is arranged opposite to the second side surface 12, the third side surface 13 is arranged opposite to the fourth side surface 14, and the first side surface 11 is adjacent to the third side surface 13 and the fourth side surface 14; the second side surface 12 is also adjacent to the third side surface 13 and the fourth side surface 14, but is opposite to the first side surface 11. The first side surface 11 of the crimping petal 10 has a crimping groove 111, which is arranged at a radial section 151 of the first side surface 11 of the crimping petal 10 close to the coupling end 15, and the second side surface 12 of the crimping petal 10 has a crimping protrusion 121, which is arranged at a radial section 151 of the second side surface 12 of the crimping petal 10 close to the coupling end 15, and the crimping protrusion 121 and the crimping groove 111 are at the same height in the radial direction of the crimping petal 10. During the crimping process, the crimping flap 10 rotates in the radial moving device 20. When it rotates to a certain angle, the crimping protrusion 121 of the second side 12 of any crimping flap 10 is embedded in the crimping groove 111 of the first side 11 of the adjacent crimping flap 10, so that the adjacent crimping flaps 10 cannot move in the central axial direction of the crimping hole, so that several crimping flaps 10 arranged along the circumferential direction always remain in the same plane during the radial sliding process, thereby avoiding axial sliding between the crimping flaps 10 when the crimping mechanism is moved to cause damage to the valve.

[0054] In a further example, Figures 4B to 4D As shown, the crimping flap 10 has a flap circumferential end 16 away from the center of the circle. A slide post 131 is provided on the third side 13 and the fourth side 14 of the crimping flap 10 respectively. The slide post 131 is arranged on the third side 13 and the fourth side 14 of the crimping flap 10 near the flap circumferential end 16, and a spiral groove 21 is provided on the inner side of the two parallel radial moving devices 20 respectively. The slide posts 131 on the third side 13 and the fourth side 14 of the crimping flap 10 are respectively slidably arranged in the spiral grooves 21 on the two parallel radial moving devices 20. During the crimping process, when the crimping flap 10 rotates, the spiral groove 21 limits the movement trajectory of the slide post 131, and the free end of the slide post 131 is embedded in the spiral groove 21 and slides along the shape of the spiral groove 21, so that the crimping flap 10 moves radially while rotating, so that the crimping hole 30 gradually shrinks. In a further example, a radial slider long hole 221 is provided on the crimping sub-disk 22 of the radial moving device 20, and the free end of the slide post 131 can slide through the radial slider long hole 221 and then be embedded in the spiral groove 21. When crimping, the radial slider long hole 221 limits the movement range of the slide post 131, so that the crimping petal 10 slides along the shape of the spiral groove 21, so that the crimping petal 10 moves radially while rotating, thereby reducing the crimping hole 30.

[0055] like Figure 3A-3B And continue as Figures 4A to 4D As shown, in this example, the valve crimping mechanism has two first radial stoppers 132 respectively arranged on the third side surface 13 and the fourth side surface 14 of the crimping flap 10 and second radial stoppers 222 respectively arranged on the inner side surfaces of two parallel radial moving devices 20. The first radial stoppers 132 and the second radial stoppers 222 cooperate with each other, so that the radial moving device 20 can slide the crimping flap 10 in the radial direction. For example, in one embodiment, the first stoppers 132 on the third side surface 13 and the fourth side surface 14 of the crimping flap 10 are radial stopper grooves, and the second stoppers 222 on the inner side surface of the radial moving device 20 are radial stopper convex strips; the radial stopper convex strips on the inner side surface of the radial moving device 20 are slidably embedded in the radial stopper grooves on the third side surface 13 and the fourth side surface 14 of the crimping flap 10, so that the radial moving device 20 can slide the crimping flap 10 in the radial direction. Another way is that the first limiting member 132 on the third side surface 13 and the fourth side surface 14 of the crimping petal 10 is a radial limiting convex strip, and the second limiting member 222 on the inner side surface of the radial moving device 20 is a radial limiting groove. The radial limiting convex strips on the third side surface 13 and the fourth side surface 14 of the crimping petal 10 are slidably embedded in the radial limiting groove on the inner side surface of the radial moving device 20, and the radial limiting convex strip can only slide in the radial limiting groove, so that the radial moving device 20 slides the crimping petal 10 along the radial direction, thereby reducing the crimping hole 30 to realize the crimping function.

[0056] The radial moving device 20 is two disks, including a pressure grip sub-disk 22 and a panel sub-disk 23, as shown in FIG2 . In this example, the pressure grip sub-disk 22 is arranged on both sides of the pressure grip petal 10, and the second radial limiter 222 is arranged on the pressure grip sub-disk 22. The pressure grip sub-disk 22 is mainly responsible for the rotation of the pressure grip petal 10. The radial sliding connection between the pressure grip sub-disk 22 and the pressure grip petal 10 is to prevent the pressure grip petal 10 and the pressure grip sub-disk 22 from rotating relative to each other. When the pressure grip is performed, the pressure grip petal 10 moves radially relative to the pressure grip sub-disk 22 during the process of rotating the pressure grip sub-disk 22 and the pressure grip petal 10, that is, the pressure grip petal 10 always moves radially relative to the pressure grip sub-disk 22 along the direction of the second limiter 222 on the pressure grip sub-disk 22. The panel sub-disk 23 is also arranged on both sides of the pressure grip sub-disk 22, and the spiral groove 21 is arranged on the panel sub-disk 23. The spiral groove 21 on the panel sub-disk 23 limits the spiral motion trajectory of the pressure grip petal 10. During the crimping process, the crimping petal 10 moves radially and rotates circumferentially relative to the panel sub-disc 23, and the crimping sub-disc 22 drives the crimping petal 10 to move helically along the spiral groove 21 in the panel sub-disc 23. During the circumferential spiral movement, the crimping petal 10 moves radially relative to the crimping sub-disc 22, thereby shrinking the crimping hole 30.

[0057] In a further example, the spiral groove 21 is an Archimedean spiral groove 21 centered at the center of the crimping hole 30. The plurality of crimping petals 10 can be divided into n groups, and the spiral grooves 21 also have n correspondingly, where n is 1 to 6, and each group of crimping petals 10 has m crimping petals 10, where m is, for example, 2 to 6. Specifically, for example, 2 to 6 crimping flaps 10 are used as a group, for example, 3, 4, or 5 crimping flaps 10 are used as a group, and each group shares a spiral groove 21. A valve crimping mechanism can have multiple groups of crimping flaps 10, and there can be 1 to 6 groups of crimping flaps 10, for example, 3, 4, or 5 groups of crimping flaps 10. At this time, the spiral grooves 21 used by the multiple groups of crimping flaps 10 can be arranged closely together, so that the spiral grooves 21 are more compact. The positional relationship of the multiple spiral grooves 21 is: one of the spiral grooves 21 is made into a corresponding number of circular uniform arrays around the center of the crimping hole 30, and all the spiral grooves 21 can be obtained. The spiral groove 21 is an Archimedean spiral groove 21 centered on the center of the crimping hole 30. Here, the outward expansion distance of the spiral groove 21 per rotation is called the pitch. When the crimping hole 30 is rotated, the spiral groove 21 is rotated in a circle. The sub-disk 22 can only rotate X°. When the radius of the panel sub-disk 23 is Y, the starting radius of the spiral groove 21 is A, and the ending radius of the spiral groove 21 is Y, that is, the radius of the panel sub-disk 23. When the corresponding number of groups of spiral grooves 21 is W, the maximum pitch of the spiral groove 21 can be set to H=(YA)[360° / (X°+360° / W)], and the compression stroke of the gripping flap 10 can be (YA)[X° / (X°+360° / W)]. When all gripping flaps 10 share one spiral groove 21, the maximum pitch of the spiral groove 21 can be set to H=(YA)[360° / (X°+360°)], and the compression stroke of the gripping flap 10 can be (YA)[X° / (X°+360° / 1)]. Therefore, when Y, A, and X° are constants, in order to achieve a larger compression stroke of the pressing and gripping flap 10, W should take a larger value. Therefore, preferably, the number of groups of spiral grooves 21 and pressing and gripping flaps 10 is W ≥ 2, and more preferably, W is 3, 4, 5, or 6. Here, W should not be too large because the size of the valve pressing and gripping mechanism needs to be considered, but the specific value can be confirmed according to actual conditions, for example, W ≤ 10 at the same time.

[0058] Continue as Figure 4B and 4CAs shown, in this example, the slide column 131 is provided with a slider 133 near the pressing and gripping petal 10, and the pressing and gripping sub-disc 22 is provided with a radial slider long hole 221. The radial slider long hole 221 is arranged in parallel with the second radial stopper 222, and the slider 133 on the pressing and gripping petal 10 is slidably embedded in the radial slider long hole 221 of the pressing and gripping sub-disc 22. During the pressing and gripping process, the pressing and gripping sub-disc 22 and the pressing and gripping petal 10 move radially relative to each other, and the slider 133 of the pressing and gripping petal 10 is restricted to slide in the radial slider long hole 221 of the pressing and gripping sub-disc 22, bearing the torsion force of the pressing and gripping sub-disc 22 on the pressing and gripping petal 10, and the slide column 131 is restricted to slide in the spiral groove 21, bearing the force of the spiral groove 21, and the force positions of the slider 133 and the slide column 131 are independent of each other. Since the spiral groove 21 with the same shape as the Archimedean spiral is a curved structure, during the crimping process, the material will be more or less deformed by the force, so the slide post 131 adopts a cylindrical structure, so that the slide post 131 and the spiral groove 21 are in line contact, and the slide post 131 slides more smoothly in the spiral groove 21. The bottom of the slide post 131 is designed as a slider 133, so that the slider 133 and the radial slider long hole 221 can be slidably matched by surface contact, which can withstand greater torque without being easily deformed, and the surface contact also makes the movement process of the slider 133 more stable.

[0059] Continue as Figure 1A and 1BAs shown, in this example, the valve crimping mechanism has a handle 40, a base 50 and a reinforcement ring 60. The handle 40 extends from the edge of at least one of the crimping sub-disc 22 and the panel sub-disc 23 of the radial moving device 20, and is arranged on the edge of the crimping sub-disc 22, for example, as shown in FIG. 2 . When the valve needs to be crimped, the handle 40 is pulled to rotate the crimping sub-disc 22, and the crimping sub-disc 22 drives the crimping petal 10 to rotate together, and the sliding column 131 of the crimping petal 10 slides along the spiral groove 21 of the panel sub-disc 23, and the crimping petal 10 moves radially relative to the crimping sub-disc 22, thereby reducing the crimping hole 30, and then achieving the crimping of the valve. In a further example, the valve crimping mechanism has a base 50, and the crimping sub-disc 22 and the panel sub-disc 23 of the radial moving device 20 are both arranged on the base 50. The panel sub-disc 23 of the radial moving device 20 is fixedly connected to the base 50 or the panel sub-disc 23 and the base 50 are designed as one body. In this case, the panel sub-disc 23 can be considered as a part of the base 50, which plays a role in supporting the pressing and gripping sub-disc 22, and has a simple structure. The disc center of the radial moving device 20 has a disc center hole, the inner part of the disc center hole is formed on the pressing and gripping sub-disc 22, and the outer part of the disc center hole is formed on the disc center of the panel sub-disc 23. The reinforcement ring 60 is provided on the disc center hole of the panel sub-disc 23 of the radial moving device 20. The reinforcement ring 60 connects the pressing and gripping sub-disc 22 and the panel sub-disc 23 and is rotatably connected to at least one of them, so as to prevent the pressing and gripping sub-disc 22 and the panel sub-disc 23 from separating, thereby preventing the sliding column 131 from detaching from the spiral groove 21.

[0060] like Figure 1A and 1C As shown, in this example, the valve crimping mechanism also has a scale 70 and a pointer 80. The scale 70 is arranged along a circumferential circle on the outer side wall of the panel sub-disk 23 of the radial moving device 20, and the pointer 80 is fixed on the crimping sub-disk 22, and the pointer 80 corresponds to different scales 70. When the handle 40 is pulled to rotate the crimping sub-disk 22, the pointer 80 rotates with the crimping sub-disk 22 with the panel sub-disk 23 as a reference. Every time the crimping sub-disk 22 rotates to a position, the crimping hole 30 will be reduced to the corresponding aperture, and the pointer 80 will stay and point to a corresponding scale 70 on the panel sub-disk 23. Therefore, the operator can know the aperture of the current crimping hole 30, that is, the size of the crimping hole 30, through the scale 70 pointed to by the pointer 80.

[0061] Continue as Figure 1A and 1CAs shown, in this example, when the valve to be crimped has barbs and positioning parts, the shape of the valve may not be a circle after it is crimped to a certain size, so it is necessary to observe and adjust multiple times to prevent damage to the valve. Therefore, an optical mirror 90 is provided on the hole wall of the disk center hole of the radial moving device 20. During the crimping process, the operator needs to repeatedly observe the crimping state and shape of the valve. Through the reflection of the optical mirror 90, the operator can directly observe the valve shape at the outer end of the crimping hole 30 without repeatedly bending down to observe, thereby reducing the risk of contaminating the operating table.

[0062] To sum up, the utility model provides a pressing and gripping groove 111 on the first side 11 of the pressing and gripping flap 10, and provides a pressing and gripping protrusion 121 on the second side 12. During the pressing and gripping process, the pressing and gripping protrusion 121 of each pressing and gripping flap 10 is embedded in the pressing and gripping groove 111 of the adjacent pressing and gripping flap 10, so that each pressing and gripping flap 10 always remains in the same plane during the radial sliding process, and no axial movement occurs, thereby avoiding valve damage.

[0063] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the utility model shall be protected within the scope defined by the attached claims.

Claims

1. A valve crimping mechanism, comprising: A plurality of crimping petals arranged along the circumferential direction, each crimping petal having a coupling end close to the center of the circle; the coupling ends of the plurality of crimping petals are coupled to form a crimping hole; Two parallel radial moving devices, the crimping petal is sandwiched between the two parallel radial moving devices, and the crimping petal is slid radially by the radial moving devices to reduce the crimping hole; It is characterized in that the first side of the crimping flap has a crimping groove, and the second side of the crimping flap opposite to the first side has a crimping protrusion, and the crimping protrusion of the crimping flap is embedded in the crimping groove of the adjacent crimping flap so that a plurality of crimping flaps arranged along the circumferential direction always remain in the same plane during radial sliding.

2. The valve crimping mechanism according to claim 1, characterized in that The crimping groove is arranged on the first side of the crimping petal close to the coupling end; The crimping protrusion is arranged on the second side of the crimping petal close to the coupling end.

3. The valve crimping mechanism according to claim 1, characterized in that The third side surface and the fourth side surface of the pressing and gripping petal are respectively provided with sliding columns; The inner side surfaces of the two parallel radial moving devices are respectively provided with spiral grooves, and the sliding posts on the third side surface and the fourth side surface of the pressing and gripping petal are respectively slidably arranged in the spiral grooves on the two parallel radial moving devices.

4. The valve crimping mechanism according to claim 3, characterized in that The radial moving device comprises: A pressing and gripping sub-disc, arranged on both sides of the pressing and gripping petal; The panel sub-disc is arranged on both sides of the pressing and gripping sub-disc, and the spiral groove is arranged on the panel sub-disc.

5. The valve crimping mechanism according to claim 4, characterized in that The pressing and gripping sub-disc is provided with a radial sliding block long hole, and the sliding column on the pressing and gripping petal passes through the radial sliding block long hole of the pressing and gripping sub-disc and is slidably arranged in the spiral groove.

6. The valve crimping mechanism according to claim 5, characterized in that The sliding column has a sliding block near the pressing and gripping petal; The slider on the pressing and gripping petal is slidably embedded in the radial slider long hole of the pressing and gripping sub-disc.

7. The valve crimping mechanism according to claim 4, characterized in that The valve crimping mechanism has two first radial limit members respectively arranged on the third side and the fourth side of the crimping flap and second radial limit members respectively arranged on the crimping sub-disc. The first radial limit members and the second radial limit members cooperate with each other to enable the radial moving device to slide the crimping flap radially. The second radial limit member is arranged parallel to the long hole of the radial slider.

8. The valve crimping mechanism according to claim 7, characterized in that The first radial limiting member is a radial limiting groove, and the second radial limiting member is a radial limiting convex strip, and the radial limiting convex strip is slidably arranged in the radial limiting groove; or, The first radial limiting member is a radial limiting convex strip, the second radial limiting member is a radial limiting groove, and the radial limiting convex strip is slidably disposed in the radial limiting groove.

9. The valve crimping mechanism according to claim 3, characterized in that The crimping petal has a petal circumferential end away from the center of the circle, and the sliding column is arranged on the third side surface and the fourth side surface of the crimping petal close to the petal circumferential end.

10. The valve crimping mechanism according to claim 1, characterized in that The coupling end of the crimping petal has a tip which forms a certain angle with the radial direction, and a plurality of tips of the crimping petals are coupled to form a crimping hole.

11. The valve crimping mechanism according to claim 3, characterized in that The spiral groove is an Archimedean spiral groove with the hole center of the grip hole as the center.

12. The valve crimping mechanism according to claim 3, characterized in that The crimping and gripping petals have n groups, and the spiral grooves have n strips, wherein n is 1-6.

13. The valve crimping mechanism according to claim 12, characterized in that Each group of crimping petals has m crimping petals, where m is 2 to 6.

14. The valve crimping mechanism according to claim 1, characterized in that The valve pressing and gripping mechanism comprises: A handle extends from an edge of the radial movement device.

15. The valve crimping mechanism according to claim 14, characterized in that The handle extends from a disk edge of a pressure-gripping sub-disk of the radial moving device and / or extends from a disk edge of a panel sub-disk of the radial moving device.

16. The valve crimping mechanism according to claim 1, characterized in that The center of the radial moving device is provided with a disk center hole, and a light mirror is arranged on the hole wall of the disk center hole.

17. The valve crimping mechanism according to claim 1, characterized in that The valve pressing and gripping mechanism also has: A base, wherein the radial moving device is arranged on the base.

18. The valve crimping mechanism according to claim 4, characterized in that The valve pressing and gripping mechanism also has: A scale, wherein the scale is arranged along a circumferential circle on the outer side wall of the panel sub-disk of the radial moving device; A pointer is fixed on the pressure-grip dividing plate, and the pointer corresponds to different scales.

19. The valve crimping mechanism according to claim 4, characterized in that The valve pressing and gripping mechanism also has: A reinforcement ring, which is arranged on the center hole of the panel sub-disk of the radial moving device, and which connects the pressure-gripping sub-disk and the panel sub-disk. The reinforcement ring is rotatably connected to the pressure-gripping sub-disk and / or the panel sub-disk.

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