Anti-deflection artificial blood vessel shaping device

Abstract

The invention provides an anti-deflection artificial blood vessel shaping device. A rack is of a vertical frame structure; the movable load platform is mounted on the lower layer of the rack; the demolding unit is mounted on the top bearing platform; the spiral corrugated die is vertically installed in the rack, the bottom of the spiral corrugated die is fixed through the rotary pneumatic clamping jaw, the top of the spiral corrugated die penetrates through the rack, and the spiral corrugated die synchronously moves up and down along with the top bearing platform. The winding unit is installed on the upper layer of the rack and drives yarn to wind the rough artificial blood vessel on the spiral corrugated mold. The deflection restraining unit is provided with a movable mechanical clamping jaw, the mechanical clamping jaw is clamped at the bottom of the rough artificial blood vessel on the spiral corrugated mold, and the rough artificial blood vessel is prevented from deflecting in the yarn winding process. The device can prevent deflection of the artificial blood vessel during yarn winding, so that the manufactured artificial blood vessel is low in defective rate and good in consistency. And meanwhile, the device can realize automatic demolding, so that the production efficiency of products is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of artificial blood vessel preparation, and in particular to an anti-deflection artificial blood vessel shaping device. Background Art

[0002] Artificial blood vessels have become one of the preferred treatment options for many diseases. However, the main reason why artificial blood vessels are difficult to promote in China is that the product has a certain degree of bleeding, and bleeding will occur after a period of use. Threaded artificial blood vessels can improve the support, elasticity, and flexibility of blood vessels. In order to solve the problem of postoperative bleeding, how to make the surface waveform of artificial blood vessels uniform is a problem. At present, there are two main types of artificial blood vessel shaping processes. One is to directly use a mold to hot-press the rough artificial blood vessel into a threaded shape. Although this process has high production efficiency, it is easy to cause the surface of the artificial blood vessel to be uneven and poor in uniformity. The other is to put the rough artificial blood vessel on the spiral corrugated mold, and then wrap the yarn around the rough artificial blood vessel, and then heat-form the whole after the winding is completed. In this process, the yarn winding is currently completed manually. The preparation personnel need to be proficient in the strength of the yarn winding to ensure that each circle of yarn is wound into the deepest part of the spiral corrugated structure of the mold during the winding process, so that the depth of each circle of corrugated structure of the produced blood vessel is the same and consistent. Although there are some mechanical devices in the art that can complete the automatic winding of yarns, such as the shaping method and device for preparing threaded artificial blood vessels in patent CN 117656439 A, the existing devices have not been able to solve the problem of deflection of the fabric caused by the force of the yarn during the winding process, resulting in poor consistency of the obtained blood vessels. At the same time, after the wound mold is placed in the oven for heat setting, the fabric needs to be demolded manually. The demolding process is time-consuming and labor-intensive, and the inside of the fabric is easily cut by the mold due to human factors. Therefore, the shaping process of artificial blood vessels is relatively complicated, the production efficiency is low, and the quality of the products produced due to human factors is inconsistent, and the defective rate is high, which has become a problem that needs to be solved urgently in this field. Summary of the invention

[0003] The present invention provides an anti-deflection artificial blood vessel shaping device, which solves the shortcomings of the prior art. The device can prevent the artificial blood vessel from deflecting when the yarn is wound, so that the defective rate of the artificial blood vessel is low and the consistency is good. At the same time, the device can also realize automatic demoulding, thereby improving the production efficiency of the product and reducing the labor intensity.

[0004] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0005] An anti-deflection artificial blood vessel shaping device comprises at least a frame, a winding unit, and a spiral corrugated mold. The anti-deflection artificial blood vessel shaping device comprises:

[0006] The rack is a vertical frame structure;

[0007] A movable load platform is installed on the lower level of the rack, and its top load-bearing platform can move up and down in the rack;

[0008] The demoulding unit, mounted on the top load-bearing platform, includes a rotating pneumatic gripper;

[0009] The spiral corrugated mold is vertically installed in the frame, its bottom is fixed by a rotating pneumatic clamp, and its top passes through the frame. The spiral corrugated mold moves up and down synchronously with the top bearing platform;

[0010] The winding unit is installed on the upper layer of the frame. It is annular in shape and is placed on the spiral corrugated mold. It drives the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugated mold. During the winding process, the spiral corrugated mold moves upward.

[0011] The deflection suppression unit is installed on one side of the frame and can move up and down synchronously with the top load-bearing platform in the frame. The deflection suppression unit is provided with an active mechanical clamp, which clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

[0012] Furthermore, the winding unit includes an annular guide rail, a first stepper motor, a slide, a tension plate and a take-up column. The annular guide rail is fixed to the upper layer of the frame, the spiral corrugation mold passes through the center of the annular guide rail, the slide is installed on the annular guide rail and moves along the annular guide rail, the first stepper motor is installed on the slide to drive the slide to move along the annular guide rail, the tension plate and the take-up column are arranged on the slide, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding, and the yarn outlet direction of the slide is always toward the spiral corrugation mold during the movement of the slide.

[0013] Furthermore, the annular guide rail is composed of two layers, the upper layer is an annular guide rail with inner and outer grooves, and the lower layer is an outer gear ring; the slide includes a slide seat and a driving gear, an inner suspension wheel and an outer suspension wheel installed under the slide seat, the inner suspension wheel and the outer suspension wheel are respectively installed in the inner and outer grooves of the annular guide rail, and the two together suspend and support the slide on the annular guide rail, the driving gear is meshed with the outer gear ring, and the output shaft of the first stepper motor is connected to the driving gear, driving the driving gear to move along the outer gear ring.

[0014] Furthermore, a mold stabilizing column is connected to the upper part of the spiral corrugated mold, and the mold stabilizing column is connected to the spiral corrugated mold through a docking groove. The upper part of the mold stabilizing column passes through the top of the frame, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to maintain the overall stability of the spiral corrugated mold when the winding unit is working and reduce the shaping error.

[0015] Furthermore, the deflection suppression unit includes a second stepper motor, a linear guide, a linear guide slide, a retractable bracket and a mechanical clamp, the second stepper motor is connected to the linear guide, the linear guide slide is installed on the screw rod of the linear guide and moves up and down driven by the second stepper motor, the retractable bracket is horizontally connected to the linear guide slide and moves up and down synchronously with the linear guide slide, and the mechanical clamp is installed and fixed by the retractable bracket and extends back and forth driven by the retractable bracket.

[0016] Furthermore, the demolding unit includes a rotating pneumatic clamp, an air clamp support frame and a third stepper motor. The air clamp support frame and the third stepper motor are arranged on a movable load platform. The rotating pneumatic clamp is arranged on the air clamp support frame and is connected to the third stepper motor. The rotating pneumatic clamp drives the spiral corrugated mold to rotate under the drive of the third stepper motor, so that the shaped artificial blood vessel is separated from the spiral corrugated mold.

[0017] Furthermore, the movable load platform includes a top bearing platform, an elevator stabilizing platform, a fourth stepper motor, an elevator load platform, an elevator stabilizing column, a linear bearing, an elevator and a coupling; the elevator stabilizing platform is located between the top bearing platform and the elevator load platform, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, the top of the elevator is connected to the top bearing platform through a circular flange, and the fourth stepper motor is connected to the elevator through a coupling and drives it, so that the top bearing platform can be lifted up and down.

[0018] Compared with the prior art, the anti-deflection artificial blood vessel shaping device provided by the present invention has the following advantages:

[0019] 1. The present invention can realize the multi-unit process to cooperate with each other to complete the artificial blood vessel shaping process. The rough artificial blood vessel is put into the mold and then put into the equipment. The winding unit drives the yarn, and the movable load platform and the offset suppression unit cooperate with it to complete the tight winding circle by circle. After the winding is completed, the fabric and the mold can be taken out as a whole and put into the oven to complete the heat setting. Then put it into the equipment again, the demoulding unit drives the mold to rotate, and the movable load platform cooperates with it to complete the fabric demoulding. The whole shaping process has a high degree of automation and a simple operation method, which greatly reduces the time required for the yarn winding process and the fabric demoulding process, and is highly efficient.

[0020] 2. The winding unit of the present invention adopts a winding method to avoid the direction of the yarn force being always consistent, which causes the artificial blood vessel to deflect. When the winding unit is working, the yarn tension is controlled by the tension plate. By making the tension reach a certain size, the yarn can press the fabric into the corrugated structure of the mold and make the spiral corrugated structure on the surface of the manufactured blood vessel consistent in height.

[0021] 3. In the present invention, one end of the spiral corrugated mold is fixed by a rotating pneumatic clamp, and the other end is extended with a column to be connected to a stabilizing column in the frame. One end of the stabilizing column is hollow and can be connected to the protruding column of the mold. The linear bearing above the frame is used to maintain the stability of the stabilizing column. When the winding unit starts to wind the spiral corrugated mold, the stabilizing column and the rotating pneumatic clamp can prevent the spiral corrugated mold from shaking drastically, causing the wound yarn to loosen or the yarn to fail to complete winding circle by circle.

[0022] 4. In order to prevent the artificial blood vessel from being deflected due to the action of the yarn during the winding process, the offset suppression unit makes the moving speed of the linear guide slide consistent with that of the movable load platform, so that the mechanical clamp can always clamp at the same position at the bottom of the artificial blood vessel, thereby suppressing the deflection of the artificial blood vessel during the winding process. At the same time, when the winding work of the winding unit is about to be completed, the mechanical clamp will retract through the retractable bracket to allow the yarn to complete the winding of the bottom of the artificial blood vessel.

[0023] 5. After the artificial blood vessel has been heat-set, a spiral corrugated structure is formed. At this time, the artificial blood vessel is like a nut, and the spiral corrugated mold is like a bolt. The demoulding process is the process of separating the bolt and the nut. In the present invention, in order to facilitate the demoulding of the artificial blood vessel after the heat setting is completed, the demoulding unit drives the mold to rotate by rotating the pneumatic clamp, and the movable load platform cooperates to move downward to complete the demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the overall structure of the anti-deflection artificial blood vessel shaping device provided by the present invention;

[0025] Figure 2 It is a structural schematic diagram of a winding unit;

[0026] Figure 3 It is a structural schematic diagram of a spiral corrugated die;

[0027] Figure 4 is a structural schematic diagram of a deflection suppression unit;

[0028] Figure 5 It is a schematic diagram of the structure of the demoulding unit;

[0029] Figure 6 It is a structural schematic diagram of a movable load platform;

[0030] In the figure: 1, frame; 2, winding unit; 3, spiral corrugated mold; 4, offset suppression unit; 5, demoulding unit; 6, movable load platform; 7, first stepper motor; 8, slide; 81, slide seat; 82, driving gear; 83, external suspension wheel; 84, internal suspension wheel; 9, tension plate; 10, take-up column; 11, annular guide rail; 111, annular slide rail; 112, outer gear ring; 12, mold stabilizing column; 14, linear guide slide; 15, second stepper motor; 16, linear guide; 17, retractable bracket; 18, mechanical gripper; 19, rotating pneumatic gripper; 20, pneumatic gripper support frame; 21, third stepper motor; 22, elevator stabilizing platform; 23, fourth stepper motor; 24, elevator load platform; 25, elevator stabilizing column; 26, linear bearing; 27, elevator; 28, coupling; 29, top load platform. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described in detail below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] The present invention provides an anti-deflection artificial blood vessel shaping device, the overall structure of which is as follows Figure 1 As shown, it includes six components, namely, a frame 1, a winding unit 2, a spiral corrugated mold 3, a movable load platform 6, a demoulding unit 5, and a deflection suppression unit 4. The frame 1 adopts a vertical frame structure, and multiple layers are arranged inside it.

[0033] The movable load platform 6 is installed on the lower layer of the frame, and its structure is as follows: Figure 1 and Figure 6 The movable load platform includes a top bearing platform 29, an elevator stabilizing platform 22, a fourth stepper motor 23, an elevator load platform 24, an elevator stabilizing column 25, a linear bearing 26, an elevator 27 and a coupling 28; the top bearing platform 29 can move up and down in the frame 1; the elevator stabilizing platform 22 is located between the top bearing platform 29 and the elevator load platform 24, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, the top of the elevator is connected to the top bearing platform through a circular flange, the fourth stepper motor is connected to the elevator through a coupling and drives it, the elevator moves up and down, so that the top bearing platform moves up and down.

[0034] The demoulding unit 5 is installed on the top bearing platform, and its structure is as follows: Figure 1 and Figure 5As shown; the demoulding unit 5 includes a rotating pneumatic clamp 19, an air clamp support frame 20 and a third stepper motor 21, the air clamp support frame 20 and the third stepper motor 21 are arranged on the top bearing platform 29 on the movable load platform, the rotating pneumatic clamp 19 is arranged on the air clamp support frame and is connected to the third stepper motor, and the rotating pneumatic clamp 19 drives the spiral corrugated mold 3 to rotate under the drive of the third stepper motor, so that the shaped artificial blood vessel is separated from the spiral corrugated mold.

[0035] The structure of the spiral corrugated die 3 is as follows: Figure 3 As shown, it is vertically installed in the frame, its bottom is fixed by a rotating pneumatic clamp 19, and its top passes through the frame 1, and the spiral corrugated mold 3 moves up and down synchronously with the top bearing platform 29; the upper part of the spiral corrugated mold is connected with a mold stabilizing column 12, and the mold stabilizing column 12 is connected to the spiral corrugated mold 3 through a docking groove, and the upper part of the mold stabilizing column 12 passes through the top of the frame 1, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to keep the spiral corrugated mold as a whole stably rising when the winding unit is working, thereby reducing the shaping error.

[0036] The winding unit 2 is installed on the upper layer of the frame, and its structure is as follows: Figure 1 and Figure 2 As shown. The winding unit 2 is annular as a whole and is sleeved on the spiral corrugation mold 3, driving the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugation mold 3. During the winding process, the spiral corrugation mold 3 moves upward. The winding unit 2 includes an annular guide rail 11, a first stepper motor 7, a slide 8, a tension plate 9 and a take-up column 10. The annular guide rail 11 is fixed to the upper layer of the frame 1. The spiral corrugation mold 3 passes through the center of the annular guide rail 11. The slide 8 is installed on the annular guide rail 11 and moves along the annular guide rail 11. The first stepper motor 7 is installed on the slide 8 to drive the slide 8 to move along the annular guide rail 11. The tension plate 9 and the take-up column 10 are arranged on the slide 8, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding. During the movement of the slide, the yarn outlet direction is always toward the spiral corrugation mold. The annular guide rail 11 is composed of two layers, the upper layer is an annular guide rail 111 with inner and outer grooves, and the lower layer is an outer gear ring 112; the slide 8 includes a slide seat 81 and a driving gear 82, an inner suspension wheel 84 and an outer suspension wheel 83 installed under the slide seat 81, and the inner suspension wheel 84 and the outer suspension wheel 83 are respectively installed in the inner and outer grooves of the annular guide rail 111, and the two together suspend and support the slide 8 on the annular guide rail, the driving gear 82 is meshed with the outer gear ring 112, and the output shaft of the first stepper motor 7 is connected to the driving gear 82, driving the driving gear to move along the outer gear ring.

[0037] The structure of the deflection suppression unit 4 is as follows Figure 1 and Figure 4As shown, it is installed on one side of the frame and can move up and down synchronously with the top bearing platform 29 in the frame 1. The deflection suppression unit 4 specifically includes a second stepper motor 15, a linear guide 16, a linear guide slide 14, a retractable bracket 17 and a mechanical clamp 18. The second stepper motor 15 is connected to the linear guide 16. The linear guide slide 14 is installed on the screw rod of the linear guide 16 and moves up and down under the drive of the second stepper motor 15. The retractable bracket level 17 is connected to the linear guide slide 14 and moves up and down synchronously with the linear guide slide. The mechanical clamp 18 is fixed by the retractable bracket 17 and retracts forward and backward under the drive of the retractable bracket 17. The deflection suppression unit is provided with a movable mechanical clamp, which clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold 3 to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

[0038] The working process of the anti-deflection artificial blood vessel shaping device provided by the present invention is as follows: first, the rough artificial blood vessel to be shaped is put on the spiral corrugated mold, and then the mechanical clamp in the deflection suppression unit is clamped at the bottom of the rough artificial blood vessel on the spiral corrugated mold. At this time, the winding unit is started, and the yarn on the take-up column is driven by the first stepper motor to drive the slide to move on the circular guide rail for winding. When the winding is started, the movable load platform and the deflection suppression unit are also started synchronously, and the top load-bearing platform in the movable load platform pushes the spiral corrugated mold to move upward, and its moving speed matches the yarn winding speed, that is, when the yarn winding is completed for one circle, the spiral corrugated mold just moves upward by a pitch height, and at the same time, the linear guide slide in the deflection suppression unit also moves the same distance on the linear guide rail. According to the above working method, the rough artificial blood vessel is wound with yarn, and during the winding process, the mechanical clamp is clamped at the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process. When the yarn winding is almost finished, the mechanical clamp retracts backwards driven by the retractable bracket, allowing the yarn to continue to wrap around the bottom of the rough artificial blood vessel. After all the winding operations are completed, the spiral corrugated mold is removed as a whole and heat-set. After the artificial blood vessel has undergone heat setting, a spiral corrugated structure is formed. Then the spiral corrugated mold is put back on the frame and clamped with the rotating pneumatic clamp in the demoulding unit. At this time, the artificial blood vessel is like a nut, and the spiral corrugated mold is like a bolt. The demoulding process is the process of separating the bolt and the nut. The demoulding unit drives the mold to rotate by rotating the pneumatic clamp, and at the same time, the movable load platform cooperates to drive the spiral corrugated mold to move downward to complete the demoulding, and the shaping process of the artificial blood vessel is completed.

Claims

1. An anti-deflection artificial blood vessel shaping device, comprising at least a frame, a winding unit, and a spiral corrugated mold, characterized in that: The anti-deflection artificial blood vessel shaping device comprises: The rack is a vertical frame structure; A movable load platform is installed on the lower level of the rack, and its top load-bearing platform can move up and down in the rack; The demoulding unit, mounted on the top load-bearing platform, includes a rotating pneumatic gripper; The spiral corrugated mold is vertically installed in the frame, its bottom is fixed by a rotating pneumatic clamp, and its top passes through the frame. The spiral corrugated mold moves up and down synchronously with the top bearing platform; The winding unit is installed on the upper layer of the frame. It is annular in shape and is placed on the spiral corrugated mold. It drives the yarn to complete the winding of the rough artificial blood vessel on the spiral corrugated mold. During the winding process, the spiral corrugated mold moves upward. The deflection suppression unit is installed on one side of the frame and can move up and down synchronously with the top load-bearing platform in the frame. The deflection suppression unit is provided with an active mechanical clamp, which clamps the bottom of the rough artificial blood vessel on the spiral corrugated mold to prevent the rough artificial blood vessel from deflecting during the yarn winding process.

2. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The winding unit includes an annular guide rail, a first stepper motor, a slide, a tension plate and a take-up column. The annular guide rail is fixed to the upper layer of the frame. The spiral corrugation mold passes through the center of the annular guide rail. The slide is installed on the annular guide rail and moves along the annular guide rail. The first stepper motor is installed on the slide to drive the slide to move along the annular guide rail. The tension plate and the take-up column are arranged on the slide, so that the yarn is driven by the slide to move on the annular guide rail under controllable tension to complete the winding. During the movement of the slide, the yarn outlet direction is always toward the spiral corrugation mold.

3. The anti-deflection artificial blood vessel shaping device according to claim 2, characterized in that: The annular guide rail is composed of two layers, the upper layer is an annular guide rail with inner and outer grooves, and the lower layer is an outer gear ring; the slide includes a slide seat and a driving gear, an inner suspension wheel and an outer suspension wheel installed under the slide seat, the inner suspension wheel and the outer suspension wheel are respectively installed in the inner and outer grooves of the annular guide rail, and the two together support the slide suspension on the annular guide rail, the driving gear is meshed with the outer gear ring, and the output shaft of the first stepper motor is connected to the driving gear, driving the driving gear to move along the outer gear ring.

4. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The upper part of the spiral corrugation mold is connected with a mold stabilizing column, and the mold stabilizing column is connected to the spiral corrugation mold through a docking groove. The upper part of the mold stabilizing column passes through the top of the frame, and a linear bearing is provided at the part where the top of the frame is connected to the mold stabilizing column, which is used to keep the spiral corrugation mold as a whole stable when the winding unit is working and reduce the shaping error.

5. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The deflection suppression unit includes a second stepper motor, a linear guide, a linear guide slide, a retractable bracket and a mechanical clamp. The second stepper motor is connected to the linear guide. The linear guide slide is installed on the screw rod of the linear guide and moves up and down under the drive of the second stepper motor. The retractable bracket is horizontally connected to the linear guide slide and moves up and down synchronously with the linear guide slide. The mechanical clamp is installed and fixed by the retractable bracket and extends back and forth under the drive of the retractable bracket.

6. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The demoulding unit includes a rotating pneumatic clamp, an air clamp support frame and a third stepper motor. The air clamp support frame and the third stepper motor are arranged on a movable load platform. The rotating pneumatic clamp is arranged on the air clamp support frame and is connected to the third stepper motor. The rotating pneumatic clamp drives the spiral corrugated mold to rotate under the drive of the third stepper motor, so that the shaped artificial blood vessel is separated from the spiral corrugated mold.

7. The anti-deflection artificial blood vessel shaping device according to claim 1, characterized in that: The movable load platform includes a top bearing platform, an elevator stabilizing platform, a fourth stepper motor, an elevator load platform, an elevator stabilizing column, a linear bearing, an elevator and a coupling; the elevator stabilizing platform is located between the top bearing platform and the elevator load platform, the elevator stabilizing platform and the elevator load platform are both fixed in the frame, a linear bearing is installed on the elevator stabilizing platform, the upper end of the elevator stabilizing column is fixedly connected to the top bearing platform, the middle part of the elevator stabilizing column passes through the linear bearing on the elevator stabilizing platform, and the linear bearing is used to make the elevator stabilizing column move up and down smoothly; the elevator load platform is used to load the elevator, the top of the elevator is connected to the top bearing platform through a circular flange, and the fourth stepper motor is connected to the elevator through a coupling and drives it, so that the top bearing platform can be lifted up and down.

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