Degradable heart stent and spraying equipment

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a degradable heart stent and spraying device.The heart stent is a net-tube-shaped frame and comprises an axial S-shaped rod set, circumferential S-shaped rods and S-shaped supporting rods, and the axial S-shaped rod set comprises a first axial S-shaped rod and a second axial S-shaped rod; the side face protruding positions of the adjacent axial S-shaped rod sets are connected through circumferential S-shaped rods, the opening directions of the first axial S-shaped rods and the opening directions of the second axial S-shaped rods are opposite, the first axial S-shaped rods and the second axial S-shaped rods form a plurality of closed holes, and the first closed holes in the two ends of each axial S-shaped rod set are connected with the second closed holes in the two ends of the two adjacent axial S-shaped rod sets through S-shaped supporting rods correspondingly. The degradable heart stent has the beneficial effects that before the position of the degradable heart stent deviates, the axial S-shaped rod group is subjected to axial acting force, and the closing hole of the axial S-shaped rod group can extend in the circumferential direction of the degradable heart stent, so that the diameter of the heart stent is increased, and the position deviation of the heart stent after long-time use is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a degradable heart stent and spraying equipment. Background Art

[0002] A heart stent is a medical device that supports the coronary artery to ensure the normal circulation of blood in the coronary artery, and the implantation of a heart stent is an effective means of treating coronary heart disease. In the prior art, a heart stent is made of stainless steel, nickel-titanium alloy or cobalt-chromium alloy, and the structure is cylindrical. The cylinder is composed of a grid of a diamond mesh structure, and has a certain overall expansion function when used. Since the size and thickness of the cylinder are consistent, some problems may occur during long-term use by patients after implantation. For example, the heart stent is poorly attached to the wall, the heart stent is not completely attached to the vascular wall, or the heart stent is completely separated from the vascular wall, further causing the coronary artery at the stent to expand like a tumor or form an aneurysm; and during the implantation of the stent, the coronary artery ruptures due to the pointed end of the stent, or the stent or the rear balloon is too large, or the expansion pressure after implantation is too large, etc.; at the same time, when the stent is just implanted, it does not fuse with the vascular wall and is affected by the peristalsis of the blood vessel, causing the stent to move away from the support position, further making the stent partially or completely ineffective; in addition, after the heart stent is implanted, the forces acting on both ends of the heart stent in the coronary artery are greater, and the two ends of the heart stent are more likely to deform. Therefore, a heart stent with an adjustable angle, not prone to displacement, and not prone to deformation at both ends is particularly important.

[0003] When processing a heart stent, drug spraying is required. In the existing spraying equipment, the heart stent is usually sleeved on a spraying fixed rod, and the ultrasonic nozzle sprays liquid medicine at a fixed position above. The spraying fixed rod drives the heart stent to rotate and move forward, thereby completing the drug spraying on the surface of the heart stent. However, the heart stent is easy to rotate relatively on the spraying fixed rod and move along the axis, which affects the uniformity of drug spraying, and the liquid medicine will reduce the friction between the heart stent and the spraying fixed rod, so that the heart stent is easier to rotate and move along the axis relative to the spraying fixed rod; at the same time, in order to prevent the heart stent from rotating relatively, the diameter of the existing spraying fixed rod is usually larger than the diameter of the heart stent, and in order to prevent the heart stent from moving along the axis, the existing spraying fixed rod is usually provided with a limiting structure at both ends of the heart stent. These characteristics of the existing spraying fixed rod make it easy for the heart stent to deform when sleeved, which increases the subsequent processing procedures. In addition, the existing spraying equipment is dried after the liquid medicine is completely sprayed on the entire surface of the heart stent. Before drying, the liquid medicine flows easily, making the drug coating of the heart stent uneven. In addition, the heart stent needs to be sterilized before spraying drugs, and then manually sleeved on the spray fixing rod for spraying. Manual operation is prone to re-contamination and reduces the spraying efficiency. Therefore, how to improve the uniformity of drug spraying on the heart stent and how to ensure the sterility of the heart stent before spraying have become urgent problems to be solved. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a degradable heart stent and spraying equipment.

[0005] The present invention relates to a spraying device for a degradable heart stent, the spraying device comprising a frame, a stent spraying device, a stent fixing device, a grasping device, a feeding device and a hot air device;

[0006] The stent spraying device is detachably connected to the frame, the hot air device is detachably connected to a side of the frame away from the stent spraying device, the hot air device is detachably connected between the stent spraying device and the hot air device, the feeding device is fixedly connected to the upper part of the frame, and the grasping device is detachably connected to a side of the hot air device away from the frame; after grasping the heart stent, the grasping device sleeves the heart stent on the outside of the stent fixing device by flipping and axial movement, the stent fixing device fixes the heart stent by radial expansion, and the stent fixing device itself does not move during the drug spraying process; the stent spraying device sprays the drug on the heart stent by flipping and axial movement.

[0007] Preferably, the bracket spraying device comprises a motor 1, a gear set, a sliding sleeve rod, a U-shaped rod, two ultrasonic nozzles and two hot air nozzles;

[0008] The motor 1 is detachably connected to a side of the frame away from the hot air device, the gear group is fixedly connected to the output shaft of the motor 1, the sliding sleeve rod is arranged on a side of the gear group away from the motor 1, an axial linear guide pair is arranged between the sliding rod and the rod sleeve of the sliding sleeve rod, the U-shaped rod is fixedly connected to the rod sleeve of the sliding sleeve rod away from the gear group, the opening of the U-shaped rod faces the side of the bracket fixing device, the two ultrasonic nozzles are fixedly connected to the inner sides of the two rod walls of the U-shaped rod, the two hot air nozzles are fixedly connected to the inner sides of the two rod walls of the U-shaped rod away from the side of the bracket fixing device, and the hot air nozzles are close to the ultrasonic nozzles.

[0009] Preferably, the gear set comprises an internal gear, an external gear 1, an external gear 2, an external gear 3 and an external gear 4, the internal gear is fixedly connected to the output shaft of the motor 1, the external gear 1 is fixedly connected to the side of the internal gear away from the motor 1, the internal gear and the external gear 1 are both half-tooth gears, the external gear 2 is meshed between the internal gear and the external gear 1, the external gear 2 is fixedly connected to the sliding rod of the sliding sleeve rod, the side of the external gear 1 away from the motor 1 is fixedly connected to the external gear 3 through a fixing rod, the external gear 4 is fixedly connected to the frame, the external gear 3 and the external gear 4 are vertically meshed, an L-shaped driving rod is fixedly connected to the center position of the side of the external gear 4 away from the frame, the L-shaped driving rod is provided with teeth at one end close to the sliding sleeve rod, and teeth are respectively provided on the upper and lower parts of the outer wall of the rod sleeve of the sliding sleeve rod to mesh with the teeth of the L-shaped driving rod.

[0010] Preferably, the bracket fixing device comprises a support frame, a second motor, a fifth external gear, a sixth external gear and a bracket fixing rod;

[0011] The support frame is fixedly connected to the frame, the motor 2 is fixedly connected to a side of the support frame away from the frame, the output shaft of the motor 2 passes through the support frame and is fixedly connected to the external gear 5, the external gear 6 is rotatably connected to a side of the support frame close to the frame, the external gear 5 and the external gear 6 are meshed, and the support fixing rod is arranged on a side of the external gear 6 close to the support spraying device; the external gear 5, the external gear 6 and the support fixing rod are all on a side of the support frame close to the support spraying device; a waste liquid collection box is arranged directly below the support fixing rod, and the waste liquid collection box is fixedly connected to the bottom of the frame;

[0012] The bracket fixing rod is provided with three sliding grooves 1 from the center to the outside, a T-shaped sliding rod is slidably connected in the sliding groove 1, a sliding shaft is fixedly connected to the side of the T-shaped sliding rod close to the outer gear 6, and three sliding grooves 2 are opened outward from the center of the outer gear 6, and the sliding shaft is slidably connected to the sliding groove 2.

[0013] Preferably, the grabbing device comprises a motor three, a linear telescopic device one and a grabbing clamp;

[0014] The motor three is fixedly connected to the frame, the linear telescopic device one is fixedly connected to a side of the motor three away from the frame, and the gripper is fixedly connected to a push rod of the linear telescopic device one away from the motor three;

[0015] The grabbing clamp is provided with a swinging rod, the upper end of the swinging rod is fixedly connected to the push rod of the linear telescopic device 1, the lower end of the swinging rod is fixedly connected to a fixing plate 1, the fixing plate 1 is respectively provided with two linear telescopic devices 2 on both sides close to and away from the bracket fixing device, the lower parts of the four linear telescopic devices 2 are respectively fixedly connected with fixing plates 2, the inner sides of the four fixing plates 2 are respectively fixedly connected with four arc-shaped clamping claws, and the openings of the corresponding two arc-shaped clamping claws are opposite to each other;

[0016] The linear telescopic device 1 and the linear telescopic device 2 are both air cylinders, oil cylinders or electric telescopic rods.

[0017] Preferably, the feeding device comprises a liquid medicine tank, a pressure pump and a feeding hose;

[0018] The top of the medicine liquid tank is fixedly connected to the upper part of the frame, a feeding port is provided on the upper part of the medicine liquid tank and passes through the frame, the pressure pump is fixedly connected to the feeding port provided on the medicine liquid tank, and the side of the pressure pump away from the medicine liquid tank is connected to the feeding hose;

[0019] The feeding hose is communicated with the hose provided in the U-shaped rod through a rotating joint, and the hose in the U-shaped rod is communicated with the ultrasonic nozzle.

[0020] Preferably, the hot air device includes a hot air blower and two hot air hoses, the hot air blower is fixedly connected to the frame, the two hot air hoses are respectively connected to the two hot air outlets above and below the hot air blower, the two hot air hoses respectively pass through the two wall rods of the U-shaped rod close to the side of the bracket fixing device, the two hot air hoses are respectively connected to the two hot air nozzles in the U-shaped rod, and the two hot air hoses are respectively provided with heating rods, and the heating rods are externally connected to a power supply.

[0021] Preferably, the bracket spraying device, bracket fixing device, gripping device, feeding device and hot air device are all externally connected to a PLC controller.

[0022] The present invention also relates to a degradable heart stent, and the spraying device of the degradable heart stent is used for drug spraying, wherein the heart stent is a mesh tube frame, and the mesh tube frame comprises an axial S-shaped rod group, a circumferential S-shaped rod and an S-shaped support rod, and the axial S-shaped rod group comprises an axial S-shaped rod 1 and an axial S-shaped rod 2;

[0023] The side convex parts of adjacent axial S-shaped rod groups are connected by the circumferential S-shaped rod, the opening directions of the axial S-shaped rod one and the axial S-shaped rod two are opposite, the axial S-shaped rod one and the axial S-shaped rod two form a plurality of closed holes, and the first closed hole at both ends of the axial S-shaped rod group and the second closed holes at both ends of the two adjacent axial S-shaped rod groups are respectively connected by the S-shaped support rod.

[0024] Preferably, the raw material of the heart stent is a degradable material, and the degradable material is polylactic acid or magnesium alloy.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are:

[0026] Compared with the prior art, the degradable heart stent and spraying equipment of the present invention can

[0027] (1) Before the degradable heart stent deviates from its position, the axial S-shaped rod group is subjected to an axial force, and the closed holes of the axial S-shaped rod group can stretch in the circumferential direction of the degradable heart stent, and the circumferential S-shaped rods can also stretch, so that the diameter of the heart stent becomes larger, so that the degradable heart stent is better fitted to the blood vessel wall, effectively preventing the heart stent from deviating from its position during long-term use;

[0028] (2) The axial S-shaped rod group of the degradable heart stent is composed of an axial S-shaped rod 1 and an axial S-shaped rod 2 whose opening directions are relatively connected, so that the degradable heart stent can adjust the angle in the coronary vein at will; and there are no obvious sharp edges at both ends of the axial S-shaped rod group, avoiding the problem of the existing heart stent end thorns damaging the coronary artery; the first closed holes at both ends of the axial S-shaped rod group and the second closed holes at both ends of two adjacent axial S-shaped rod groups are respectively connected through S-shaped support rods, so that the two ends of the degradable heart stent are not easy to deform;

[0029] (3) The spraying equipment realizes the effect of rotating and moving the ultrasonic nozzle forward to spray the surface of the degradable heart stent through the stent fixing device and the stent spraying device. During the spraying process, the stent fixing rod and the heart stent do not need to rotate or move forward; the relative rotation and axial relative movement between the stent fixing rod and the heart stent are prevented during the drug spraying process, thereby improving the uniformity of the drug spraying of the degradable heart stent;

[0030] (4) The stent fixing device of the spraying equipment drives the outer gear six to rotate through the outer gear five, and the rotation of the outer gear six drives the sliding shaft to slide in the sliding groove two, so that the sliding shaft drives the T-shaped sliding rod to slide in the sliding groove one, so that the stent fixing device can be suitable for heart stents with different diameters and deformation amounts; and the contact surface with the heart stent is reduced, avoiding the accumulation of liquid medicine at the contact position between the heart stent and the stent fixing rod, resulting in reduced uniformity of drug spraying;

[0031] (5) The stent spraying device of the spraying equipment is provided with an ultrasonic nozzle close to the hot air nozzle. After the ultrasonic nozzle sprays the drug on the heart stent, the hot air nozzle can immediately dry the part of the heart stent sprayed with the drug liquid, effectively avoiding the flow of the drug liquid causing a decrease in the spraying uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for describing the embodiment.

[0033] Figure 1 This is a plan view of the degradable heart stent provided in Example 1;

[0034] Figure 2 A schematic diagram of the spraying equipment provided in Example 1;

[0035] Figure 3 The internal structure diagram of the spraying equipment provided in Example 1;

[0036] Figure 4 A schematic diagram of a stent spraying device provided in Example 1;

[0037] Figure 5 Schematic diagram of the bracket fixing device provided in Example 1.

[0038] Description of reference numerals:

[0039] 1—axial S-shaped rod group, 2—circumferential S-shaped rod, 3—S-shaped support rod, 4—axial S-shaped rod one, 5—axial S-shaped rod two, 6—closed hole, 7—frame, 8—bracket spraying device, 9—bracket fixing device, 10—grabbing device, 11—feeding device, 12—hot air device, 13—motor one, 14—gear group; 15—sliding sleeve rod, 16—U-shaped rod, 17—ultrasonic nozzle, 18—hot air nozzle, 19—internal gear, 20—external gear one, 21—external gear two, 22—external gear three, 23—external gear four, 24—L-shaped driving rod, 25—support Support frame, 26—motor 2, 27—external gear 5, 28—external gear 6, 29—bracket fixing rod, 30—waste liquid collection box, 31—sliding groove 1, 32—T-shaped sliding rod, 33—sliding shaft, 34—sliding groove 2, 35—motor 3, 36—linear telescopic device 1, 37—grabbing clamp, 38—swinging rod; 39—fixed plate 1, 40—linear telescopic device 2, 41—fixed plate 2, 42—arc-shaped clamp, 43—medicine liquid tank, 44—pressure pump, 45—feeding hose, 46—rotating joint, 47—hot air blower, 48—hot air hose, 49—heating rod. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0042] Example 1

[0043] like Figure 2-Figure 5 As shown, a spraying device for a degradable heart stent includes a frame 7, a stent spraying device 8, a stent fixing device 9, a gripping device 10, a feeding device 11 and a hot air device 12.

[0044] like Figure 2-Figure 5 As shown, the bracket spraying device 8 is detachably connected to the frame 7, the hot air device 12 is detachably connected to the side of the frame 7 away from the bracket spraying device 8, the hot air device 12 is detachably connected between the bracket spraying device 8 and the hot air device 12, the feeding device 11 is fixedly connected to the upper part of the frame 7, and the grasping device 10 is detachably connected to the side of the hot air device 12 away from the frame 7.

[0045] like Figure 2-Figure 5 As shown, the bracket spraying device 8 includes a motor 13, a gear set 14, a sliding sleeve rod 15, a U-shaped rod 16, two ultrasonic nozzles 17 and two hot air nozzles 18.

[0046] like Figure 2-Figure 5 As shown, the motor 13 is detachably connected to the side of the frame 7 away from the hot air device 12, an axial linear guide pair is arranged between the sliding rod and the rod sleeve of the sliding sleeve rod 15, the gear group 14 is fixedly connected to the output shaft of the motor 13, the sliding sleeve rod 15 is arranged on the side of the gear group 14 away from the motor 13, the U-shaped rod 16 is fixedly connected to the rod sleeve on the side of the sliding sleeve rod 15 away from the gear group 14, the opening of the U-shaped rod 16 faces the side of the bracket fixing device 9, two ultrasonic nozzles 17 are fixedly connected to the inner sides of the two rod walls of the U-shaped rod 16, two hot air nozzles 18 are fixedly connected to the inner sides of the two rod walls of the U-shaped rod 16 away from the side of the bracket fixing device 9, and the hot air nozzles 18 are close to the ultrasonic nozzles 17.

[0047] like Figure 2-Figure 5 As shown, the gear set 14 includes an internal gear 19, an external gear 1 20, an external gear 21, an external gear 3 22 and an external gear 4 23. The internal gear 19 is fixedly connected to the output shaft of the motor 13, and the external gear 1 20 is fixedly connected to the side of the internal gear 19 away from the motor 13. The internal gear 19 and the external gear 1 20 are both half-tooth gears. The external gear 21 is meshed between the internal gear 19 and the external gear 1 20. The external gear 21 is fixedly connected to the sliding rod of the sliding sleeve rod 15. The side of the external gear 1 20 away from the motor 13 is fixedly connected to the external gear 3 22 through a fixed rod. The external gear 4 23 is fixedly connected to the frame 7. The external gear 3 22 and the external gear 4 23 are vertically meshed. An L-shaped driving rod 24 is fixedly connected to the center position of the side of the external gear 4 23 away from the frame 7. The L-shaped driving rod 24 is provided with teeth at one end close to the sliding sleeve rod 15, and teeth are respectively provided on the upper and lower parts of the outer wall of the rod sleeve of the sliding sleeve rod 15 to mesh with the teeth of the L-shaped driving rod 24.

[0048] like Figure 2-Figure 5 As shown, the bracket fixing device 9 includes a support frame 25, a second motor 26, a fifth external gear 27, a sixth external gear 28 and a bracket fixing rod 29.

[0049] like Figure 2-Figure 5 As shown, the support frame 25 is fixedly connected to the frame 7, the motor 26 is fixedly connected to the side of the support frame 25 away from the frame 7, the output shaft of the motor 26 passes through the support frame 25 and is fixedly connected to the outer gear 5 27, the outer gear 6 28 is rotatably connected to the side of the support frame 25 close to the frame 7, the outer gear 5 27 and the outer gear 6 28 are meshed, and the bracket fixing rod 29 is arranged on the side of the outer gear 6 28 close to the bracket spraying device 8; the outer gear 5 27, the outer gear 6 28 and the bracket fixing rod 29 are all on the side of the support frame 25 close to the bracket spraying device 8; a waste liquid collection box 30 is arranged directly below the bracket fixing rod 29, and the waste liquid collection box 30 is fixedly connected to the bottom of the frame 7.

[0050] like Figure 2-Figure 5As shown, the bracket fixing rod 29 is provided with three sliding grooves 31 from the center to the outside, a T-shaped sliding rod 32 is slidably connected in the sliding groove 31, a sliding shaft 33 is fixedly connected to the side of the T-shaped sliding rod 32 close to the outer gear 6 28, and three sliding grooves 34 are provided outward from the center of the outer gear 6 28, and the sliding shaft 33 is slidably connected to the sliding groove 34.

[0051] like Figure 2-Figure 5 As shown, the grabbing device 10 includes a motor 35 , a linear telescopic device 36 and a grabbing clamp 37 .

[0052] like Figure 2-Figure 5 As shown, motor three 35 is fixedly connected to the frame 7, linear telescopic device one 36 is fixedly connected to the side of motor three 35 away from the frame 7, and the gripper 37 is fixedly connected to the push rod on the side of linear telescopic device one 36 away from the motor three 35.

[0053] like Figure 2-Figure 5 As shown, the gripping clamp 37 is provided with a swing rod 38, the upper end of the swing rod 38 is fixedly connected to the push rod of the linear telescopic device 36, the lower end of the swing rod 38 is fixedly connected to a fixing plate 39, the fixing plate 39 is respectively provided with two linear telescopic devices 40 on both sides close to and away from the bracket fixing device 9, the four linear telescopic devices 40 are respectively fixedly connected to the bottom with a fixing plate 41, the inner sides of the four fixing plates 41 are respectively fixedly connected with four arc-shaped clamping claws 42, and the openings of the corresponding two arc-shaped clamping claws 42 are opposite.

[0054] like Figure 2-Figure 5 As shown, the linear telescopic device 1 36 and the linear telescopic device 2 40 are both cylinders.

[0055] like Figure 2-Figure 5 As shown, the feeding device 11 includes a liquid medicine tank 43 , a pressure pump 44 and a feeding hose 45 .

[0056] like Figure 2-Figure 5 As shown, the top of the medicine liquid tank 43 is fixedly connected to the upper part of the frame 7, a feeding port is provided on the upper part of the medicine liquid tank 43 and passes through the frame 7, a pressure pump 44 is fixedly connected to the feeding port provided on the medicine liquid tank 43, and the side of the pressure pump 44 away from the medicine liquid tank 43 is connected to the feeding hose 45.

[0057] like Figure 2-Figure 5 As shown, the feeding hose 45 is connected to the hose provided in the U-shaped rod 16 through the rotating joint 46, and the hose in the U-shaped rod 16 is connected to the ultrasonic nozzle 17.

[0058] like Figure 2-Figure 5As shown, the hot air device 12 includes a hot air blower 47 and two hot air hoses 48. The hot air blower 47 is fixedly connected to the frame 7. The two hot air hoses 48 are respectively connected to the two hot air outlets above and below the hot air blower 47. The two hot air hoses 48 respectively pass through the two wall rods of the U-shaped rod 16 close to the side of the bracket fixing device 9. The two hot air hoses 48 are respectively connected to the two hot air nozzles 18 in the U-shaped rod 16. Heating rods 49 are respectively provided on the two hot air hoses 48, and the heating rods 49 are externally connected to a power source.

[0059] The support spraying device 8, the support fixing device 9, the grabbing device 10, the feeding device 11 and the hot air device 12 are all externally connected to a PLC controller.

[0060] like Figure 1 As shown, a degradable heart stent is sprayed with drugs using the above-mentioned degradable heart stent spraying equipment. The heart stent is a mesh tube frame, which includes an axial S-shaped rod group 1, a circumferential S-shaped rod 2 and an S-shaped support rod 3. The axial S-shaped rod group 1 includes an axial S-shaped rod one 4 and an axial S-shaped rod two 5.

[0061] like Figure 1 As shown, the side convex parts of adjacent axial S-shaped rod groups 1 are connected by a circumferential S-shaped rod 2, the opening directions of the axial S-shaped rod 1 4 and the axial S-shaped rod 2 5 are opposite, the axial S-shaped rod 1 4 and the axial S-shaped rod 2 5 form a plurality of closed holes 6, and the first closed hole 6 at both ends of the axial S-shaped rod group 1 and the second closed holes 6 at both ends of the two adjacent axial S-shaped rod groups 1 are respectively connected by S-shaped support rods 3.

[0062] The raw material of the heart stent is degradable material, and the degradable material is magnesium alloy.

[0063] The working principle of the spraying device is as follows:

[0064] Grabbing device: The staff places the storage box of the heart stent under the grasping clamp 37, the push rod of the linear telescopic device 2 40 contracts, the four arc-shaped claws 42 grasp the heart stent, the motor 35 drives the linear telescopic device 1 36 to drive the grasping clamp 37 to rotate until the heart stent is coaxial with the stent fixing rod 29, the push rod of the linear telescopic device 1 36 contracts, and the heart stent is sleeved on the stent fixing rod 29.

[0065] Bracket fixing device: Motor 2 26 drives outer gear 5 27 to rotate, outer gear 5 27 drives outer gear 6 28 to rotate, and the rotation of outer gear 6 28 drives the sliding shaft 33 to slide in sliding groove 2 34, so that the sliding shaft 33 drives the T-shaped sliding bar 32 to slide in sliding groove 1 31, and the T-shaped sliding bar 32 fixes the heart bracket.

[0066] Bracket spraying device: (1) Motor 13 drives inner gear 19 to rotate, inner gear 19 drives outer gear 1 20 to rotate, inner gear 19 drives outer gear 2 21 to rotate half a circle, outer gear 2 21 drives ultrasonic nozzle 17 and hot air nozzle 18 to rotate half a circle through sliding sleeve rod 15 and U-shaped rod 16; (2) Outer gear 1 20 drives outer gear 3 22 to rotate, outer gear 3 22 drives outer gear 4 23 to rotate, outer gear 4 23 drives L-shaped driving rod 24 to rotate, L-shaped driving rod 24 drives the rod sleeve of sliding sleeve rod 15 to move toward bracket fixing device 9, the rod sleeve of sliding sleeve rod 15 drives U-shaped rod 16 to move, U-shaped rod 16 drives The ultrasonic nozzle 17 and the hot air nozzle 18 move; (3) the outer gear 1 20 drives the outer gear 2 21 to rotate half a circle in the opposite direction, and the outer gear 2 21 drives the ultrasonic nozzle 17 and the hot air nozzle 18 to rotate half a circle in the opposite direction through the sliding sleeve rod 15 and the U-shaped rod 16; (4) the outer gear 1 20 continues to drive the outer gear 3 22 to rotate, the outer gear 3 22 drives the outer gear 4 23 to rotate, the outer gear 4 23 drives the L-shaped driving rod 24 to rotate, the L-shaped driving rod 24 drives the rod sleeve of the sliding sleeve rod 15 to move toward the bracket fixing device 9, the rod sleeve of the sliding sleeve rod 15 drives the U-shaped rod 16 to move, and the U-shaped rod 16 drives the ultrasonic nozzle 17 and the hot air nozzle 18 to move. The above four steps are repeated until the drug spraying is completed on the entire surface of the heart stent.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A spraying device for a degradable heart stent, characterized in that: The spraying equipment comprises a frame (7), a bracket spraying device (8), a bracket fixing device (9), a gripping device (10), a feeding device (11) and a hot air device (12); The support spraying device (8) is detachably connected to the frame (7), the hot air device (12) is detachably connected to a side of the frame (7) away from the support spraying device (8), the hot air device (12) is detachably connected between the support spraying device (8) and the hot air device (12), the feeding device (11) is fixedly connected to the upper part of the frame (7), and the grabbing device (10) is detachably connected to a side of the hot air device (12) away from the frame (7); After the grasping device (10) grasps the heart stent, it is turned over and moved axially to sleeve the heart stent onto the outside of the stent fixing device (9). The stent fixing device (9) fixes the heart stent by radial expansion, and the stent fixing device (9) itself does not move during the drug spraying process. The stent spraying device (8) sprays the drug on the heart stent by flipping and axially moving.

2. The spraying device for the degradable heart stent according to claim 1, characterized in that: The bracket spraying device (8) comprises a motor 1 (13), a gear set (14), a sliding sleeve rod (15), a U-shaped rod (16), two ultrasonic spray heads (17) and two hot air nozzles (18); The motor 1 (13) is detachably connected to a side of the frame (7) away from the hot air device (12); the gear set (14) is fixedly connected to the output shaft of the motor 1 (13); the sliding sleeve rod (15) is arranged on a side of the gear set (14) away from the motor 1 (13); an axial linear guide pair is arranged between the sliding rod and the rod sleeve of the sliding sleeve rod (15); the U-shaped rod (16) is fixedly connected to the rod sleeve of the sliding sleeve rod (15) away from the gear set (14); the opening of the U-shaped rod (16) faces the side of the bracket fixing device (9); the two ultrasonic nozzles (17) are fixedly connected to the inner sides of the two rod walls of the U-shaped rod (16); the two hot air nozzles (18) are fixedly connected to the inner sides of the two rod walls of the U-shaped rod (16) away from the bracket fixing device (9); and the hot air nozzles (18) are close to the ultrasonic nozzles (17).

3. The spraying device for the degradable heart stent according to claim 2, characterized in that: The gear set (14) comprises an internal gear (19), an external gear 1 (20), an external gear 2 (21), an external gear 3 (22) and an external gear 4 (23); the internal gear (19) is fixedly connected to the output shaft of the motor 1 (13); the external gear 1 (20) is fixedly connected to a side of the internal gear (19) away from the motor 1 (13); the internal gear (19) and the external gear 1 (20) are both half-tooth gears; the external gear 2 (21) is meshed between the internal gear (19) and the external gear 1 (20); the external gear 2 (21) is fixedly connected to the slide rod of the sliding sleeve rod (15). The outer gear 1 (20) is connected to the outer gear 3 (22) via a fixing rod at a side away from the motor 1 (13); the outer gear 4 (23) is fixedly connected to the frame (7); the outer gear 3 (22) and the outer gear 4 (23) are vertically meshed; an L-shaped driving rod (24) is fixedly connected to the center position of the side away from the frame (7); the L-shaped driving rod (24) is provided with teeth at one end close to the sliding sleeve rod (15); teeth are respectively provided on the upper and lower sides of the outer wall of the rod sleeve of the sliding sleeve rod (15) and mesh with the teeth of the L-shaped driving rod (24).

4. The spraying device for the degradable heart stent according to claim 3, characterized in that: The support fixing device (9) comprises a support frame (25), a second motor (26), a fifth external gear (27), a sixth external gear (28) and a support fixing rod (29); The support frame (25) is fixedly connected to the frame (7), the motor 2 (26) is fixedly connected to a side of the support frame (25) away from the frame (7), the output shaft of the motor 2 (26) passes through the support frame (25) and is fixedly connected to the external gear 5 (27), the external gear 6 (28) is rotatably connected to a side of the support frame (25) close to the frame (7), the external gear 5 (27) and the external gear 6 (28) are meshed, and the support fixing rod (29) is arranged on a side of the external gear 6 (28) close to the support spraying device (8); the external gear 5 (27), the external gear 6 (28) and the support fixing rod (29) are all on a side of the support frame (25) close to the support spraying device (8); a waste liquid collection box (30) is arranged directly below the support fixing rod (29), and the waste liquid collection box (30) is fixedly connected to the bottom of the frame (7); The bracket fixing rod (29) is provided with three sliding grooves (31) from the center to the outside, and a T-shaped sliding rod (32) is slidably connected in the sliding groove (31). A sliding shaft (33) is fixedly connected to the side of the T-shaped sliding rod (32) close to the external gear (28). Three sliding grooves (34) are provided from the center to the outside of the external gear (28), and the sliding shaft (33) is slidably connected to the sliding grooves (34).

5. The spraying device for the degradable heart stent according to claim 4, characterized in that: The grabbing device (10) comprises a motor three (35), a linear telescopic device one (36) and a grabbing clamp (37); The motor three (35) is fixedly connected to the frame (7), the linear telescopic device one (36) is fixedly connected to a side of the motor three (35) away from the frame (7), and the gripper (37) is fixedly connected to a push rod on a side of the linear telescopic device one (36) away from the motor three (35); The grabbing clamp (37) is provided with a swing rod (38), the upper end of the swing rod (38) is fixedly connected to the push rod of the linear telescopic device (36), the lower end of the swing rod (38) is fixedly connected to a fixing plate (39), the fixing plate (39) is provided with two linear telescopic devices (40) on both sides close to and far from the bracket fixing device (9), the lower parts of the four linear telescopic devices (40) are respectively fixedly connected with a fixing plate (41), the inner sides of the four fixing plates (41) are respectively fixedly connected with four arc-shaped clamping claws (42), and the openings of the corresponding two arc-shaped clamping claws (42) are opposite to each other; The linear telescopic device 1 (36) and the linear telescopic device 2 (40) are both air cylinders, oil cylinders or electric telescopic rods.

6. The spraying device for the degradable heart stent according to claim 5, characterized in that: The feeding device (11) comprises a liquid medicine tank (43), a pressure pump (44) and a feeding hose (45); The top of the liquid medicine tank (43) is fixedly connected to the upper part of the frame (7); a feeding port is provided on the upper part of the liquid medicine tank (43) and passes through the frame (7); the pressure pump (44) is fixedly connected to the feeding port provided on the liquid medicine tank (43); and the side of the pressure pump (44) away from the liquid medicine tank (43) is connected to the feeding hose (45); The feeding hose (45) is connected to a hose provided in the U-shaped rod (16) via a rotating joint (46), and the hose in the U-shaped rod (16) is connected to the ultrasonic nozzle (17).

7. The spraying device for the degradable heart stent according to claim 6, characterized in that: The hot air device (12) comprises a hot air blower (47) and two hot air hoses (48). The hot air blower (47) is fixedly connected to the frame (7). The two hot air hoses (48) are respectively connected to two hot air outlets above and below the hot air blower (47). The two hot air hoses (48) respectively pass through two wall rods of the U-shaped rod (16) close to one side of the bracket fixing device (9). The two hot air hoses (48) are respectively connected to the two hot air nozzles (18) in the U-shaped rod (16). The two hot air hoses (48) are respectively provided with heating rods (49), and the heating rods (49) are externally connected to a power source.

8. The spraying device for the degradable heart stent according to claim 7, characterized in that: The support spraying device (8), support fixing device (9), grasping device (10), feeding device (11) and hot air device (12) are all externally connected to a PLC controller.

9. A degradable cardiac stent, characterized in that: Using the spraying equipment of the degradable heart stent according to any one of claims 1 to 8 for drug spraying, the heart stent is a mesh tube frame, the mesh tube frame comprises an axial S-shaped rod group (1), a circumferential S-shaped rod (2) and an S-shaped support rod (3), the axial S-shaped rod group (1) comprises an axial S-shaped rod one (4) and an axial S-shaped rod two (5); The side convex parts of adjacent axial S-shaped rod groups (1) are connected by the circumferential S-shaped rod (2); the opening directions of the axial S-shaped rod one (4) and the axial S-shaped rod two (5) are opposite; the axial S-shaped rod one (4) and the axial S-shaped rod two (5) form a plurality of closed holes (6); the first closed hole (6) at the two ends of the axial S-shaped rod group (1) and the second closed hole (6) at the two ends of the two adjacent axial S-shaped rod groups (1) are respectively connected by the S-shaped support rod (3).

10. The degradable cardiac stent according to claim 9, characterized in that: The raw material of the heart stent is a degradable material, and the degradable material is polylactic acid or magnesium alloy.

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