Valve leaflet screening and matching device of bioprosthetic valve

Abstract

The valve leaflet screening and matching device comprises a detection box, the detection box is provided with a plurality of movable pulley sets, the movable pulley sets are connected through pull ropes, one end of each pull rope is fixedly connected to the top of a supporting frame, and the other end of each pull rope is connected with a balancing weight; the detection box is provided with a connecting assembly on the movable pulley, and the detection box is provided with a positioning assembly under the movable pulley; an electronic displacement sensing device is arranged at the position, corresponding to the balancing weight, of the detection box, the electronic displacement sensing device can detect the displacement amount of the balancing weight and send detected data to a computer, and the computer uses a screening and matching program to conduct matching of a set of three valve leaflets according to preset screening and matching parameters. The extension length of the valve leaflet when the heavy object is pulled down can be amplified through the pulley block, then the extension length of the valve leaflet is accurately measured, the screening precision is improved, meanwhile, the labor cost is reduced, the subjectivity of manual matching is reduced, and the screening and matching of the valve leaflet are more objective and parameterized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of biological valve leaflet screening matching devices, in particular to a biological valve leaflet screening matching device. BACKGROUND

[0002] A biological valve is a heart valve prosthesis made entirely or mainly of biological materials. The main source of its valve leaflet material is pig pericardium or cow pericardium which is processed in a series of special ways to form a structure with a function similar to that of an autologous heart valve. Such naturally derived valve leaflet material has poor homogeneity. At present, a three-leaflet valve made by using the bionic principle is prone to failure because of the poor homogeneity of the three valve leaflets. The specific failure mode is valve regurgitation caused by the collapse of one or two valve leaflets. Therefore, the homogeneity of the three valve leaflets of one valve under pressure or stress is particularly important.

[0003] In the production of a biological valve, three valve leaflets are required to produce one biological valve. Since the three valve leaflets of the same group are required to have consistent stress deformation data, it is difficult to screen out valve leaflets with deformation within a set range and match three valve leaflets with good consistency when the valve leaflets are mixed in batches during production. Therefore, the valve leaflets need to be screened and matched. The common screening method is to place the valve leaflets on a horizontal rod and observe the natural drooping and bending state of the valve leaflets for qualitative determination, which is poor in objectivity and varies from person to person. The commonly used screening and matching method is to suspend one end of the valve leaflet on a device with a scale, and suspend a weight at the other end of the valve leaflet. The valve leaflet will be elongated under the action of the weight, and the elongation of the valve leaflet can be quantitatively measured by the scale. Since the weight should not be too heavy, too heavy will cause damage to the valve leaflet. Therefore, the elongation of the valve leaflet under the action of the weight is about 1-6 mm, and the accuracy of the scale is 0.5 mm. However, the ideal elongation measurement accuracy is 0.1 mm or 0.05 mm, which results in low judgment accuracy and makes it difficult to select three valve leaflets with similar deformation to form a group. SUMMARY

[0004] In order to accurately measure the elongation of the valve leaflet, improve the screening accuracy, reduce the labor cost, reduce the subjectivity of manual matching, and make the screening and matching of the valve leaflet more objective and parameterized, the application provides a biological valve leaflet screening and matching device.

[0005] The biological valve leaflet screening and matching device provided by the application adopts the following technical scheme: The application discloses a leaflet screening and matching device of a biological valve, which comprises a detection box, and a stretching mechanism arranged in the detection box.

[0006] By adopting the technical scheme, when a user uses the device, the automatic feeding mechanism automatically and orderly feeds the leaflet material to the connecting assembly and the positioning assembly, one end of the leaflet is fixed to the positioning assembly, and the other end is fixed to the connecting assembly, the counterweight is driven to move the dynamic pulley set under the action of gravity, the same counterweight is used to stretch the leaflet, the multiple dynamic pulley sets can amplify the displacement by multiple times, and then the displacement of the counterweight is measured to calculate the deformation of the leaflet; the displacement of the counterweight is N times (N represents the number of rope segments connected to the dynamic pulley) of the displacement of the leaflet, the displacement of the leaflet is amplified by the pulley set, and then the stretching length of the leaflet is accurately measured, the screening precision is improved, the labor cost is reduced, the subjectivity of manual matching is reduced, the screening and matching of the leaflets are more objective and parameterized, and in addition, the automatic feeding assembly feeds the leaflets in an orderly manner, the deformation of each leaflet is sent to the computer by the electronic displacement sensor, the processing unit of the computer can record and screen the deformation of the leaflets, and the staff can quickly and intuitively select the appropriate leaflets, and the working efficiency is greatly improved.

[0007] Optionally, each of the pulley assemblies comprises a support frame fixed to the top wall of the detection box, a guide channel is formed in the support frame and vertically arranged, a dynamic pulley is arranged in the guide channel, a positioning rod is arranged on the top wall of the detection box, a fixed pulley is rotatably connected to the positioning rod, and the rope is sequentially wound around the bottom of the dynamic pulley and the top of the fixed pulley.

[0008] By adopting the technical scheme, when a user uses the device, the counterweight is driven to move the dynamic pulley set under the action of gravity, the same counterweight is used to stretch the leaflet.

[0009] Optionally, the detection box is provided with an automatic ejection assembly corresponding to the position of the counterweight; the automatic ejection assembly comprises a fixed rod fixedly connected in the detection box, the fixed rod is vertically arranged, a sliding groove is formed in the fixed rod, a screw rod is rotatably connected to the side wall of the fixed rod, a support plate is threadedly connected to the screw rod, the support plate passes through the sliding groove and is used for abutting against the bottom of the counterweight, a driving motor is fixedly connected to the fixed rod, and the output shaft of the driving motor is fixed to the screw rod.

[0010] By adopting the above technical scheme, when a user uses the device, the driving motor drives the support plate to abut against the bottom of the counterweight, so that the counterweight is lifted, and the counterweight is prevented from driving the pull rope to move downward in the process of installing the leaflets; in the detection process, the driving motor drives the support plate to move downward, so that the supporting force of the support plate on the counterweight disappears, the counterweight drives the pull rope to move under the action of gravity, and the same gravity is used to stretch and detect the leaflets, and meanwhile, the installation of the leaflets and the movable pulley is facilitated.

[0011] Optionally, a through groove is formed in the side wall of the detection box, the automatic feeding mechanism comprises a positioning plate, the positioning plate is inserted into the through groove, two hanging rods are symmetrically arranged on the positioning plate, the two hanging rods are vertically arranged on the positioning plate, the hanging rods are horizontally arranged, the end portions of the hanging rods are in abutment with the connecting assembly, the two ends of the leaflets are provided with through holes, the through holes are respectively sleeved on the hanging rods, and the positioning plate is provided with a driving assembly for driving the leaflets to slide along the hanging rods to the connecting assembly.

[0012] By adopting the above technical scheme, when a user uses the device, the leaflets are sorted, the two ends of the sorted leaflets are sequentially hung on the hanging rods, the driving assembly drives the hanging rods to slide along the hanging rods to the connecting assembly, the connecting assembly automatically pushes the leaflets to be connected with the movable pulley and the positioning assembly, and automatic feeding and automatic stretching testing are realized.

[0013] Optionally, the driving assembly comprises a feeding motor fixedly connected to the positioning plate, the output shaft of the feeding motor extends into the positioning plate and is fixedly connected with a transmission wheel, the transmission wheel is fixedly connected with a spiral feeding piece, and the leaflets are clamped in the spiral groove of the spiral feeding piece.

[0014] By adopting the above technical scheme, when a user uses the device, after the feeding motor is powered on, the feeding motor drives the spiral feeding piece to rotate, and then pushes the leaflets to sequentially slide in the direction of the movable pulley, so that automatic and orderly feeding is realized.

[0015] Optionally, a fixed block is arranged in the detection box, a feeding plate is slidably connected to the fixed block, the top and the bottom of the feeding plate are at the same height as the hanging rods, the bottom and the top of the feeding plate are both provided with accommodating cavities, one end of the accommodating cavities close to the hanging rods is open, a reset spring is fixedly connected in the accommodating cavities, one end of the reset spring close to the open end is provided with an insertion column, the insertion column is used for abutting and supporting on the hanging rods, and the fixed block is provided with a pushing assembly for driving the feeding plate to slide to be connected with the connecting assembly and the positioning assembly.

[0016] By adopting the technical scheme, when a user uses the device, the feeding motor drives the spiral feeding piece to rotate, and then pushes the leaflets to slide in turn to the direction of the movable pulley, the inserting column and the hanging rod abut, the spiral feeding piece pushes the leaflets to the inserting column, the pushing assembly pushes the leaflets on the feeding plate to be connected and fixed with the connecting assembly and the positioning assembly, and automatic feeding is completed.

[0017] Optionally, the pushing assembly comprises a rack fixedly connected to the feeding plate, a guide groove is formed in the fixed block, the rack is slidably connected in the guide groove, the top of the fixed block is fixedly connected with a power motor, the output shaft of the power motor extends into the guide groove and is fixedly connected with a gear, and the gear is engaged with the rack.

[0018] By adopting the technical scheme, when a user uses the device, the feeding motor drives the spiral feeding piece to rotate, and then pushes the leaflets to slide in turn to the direction of the movable pulley, the inserting column and the hanging rod abut, the spiral feeding piece pushes the leaflets to the inserting column, the pushing assembly pushes the leaflets on the feeding plate to be connected and fixed with the connecting assembly and the positioning assembly, and automatic feeding is completed.

[0019] Optionally, the side of the feeding plate close to the hanging rod is fixedly connected with a positioning seat, a rotating shaft is rotatably connected to the positioning seat, one pushing plate is fixedly connected to the rotating shaft, the top of the positioning seat is fixedly connected with a pushing motor, and the output shaft of the pushing motor is fixedly connected with the rotating shaft.

[0020] By adopting the technical scheme, when a user uses the device, the feeding motor drives the spiral feeding piece to rotate, and then pushes the leaflets to slide in turn to the direction of the movable pulley, the inserting column and the hanging rod abut, the spiral feeding piece pushes the leaflets to the inserting column, the pushing assembly pushes the leaflets on the feeding plate to be connected and fixed with the connecting assembly and the positioning assembly, and automatic feeding is completed.

[0021] Optionally, the connecting assembly comprises a connecting seat rotatably connected to the movable pulley, a notch groove is formed in the bottom of the connecting seat, the connecting seat is provided with a first electric push rod at the position corresponding to the notch groove, the end of the first electric push rod is provided with a positioning column, the positioning column is used for abutting with the inserting column, and a locking groove one is formed above the connecting seat at the position of the notch groove, the locking groove one is vertically formed, a first locking spring vertically arranged in the locking groove one, the end of the first locking spring is fixedly connected with a first locking block, and the bottom of the first locking block protrudes out of the locking groove one.

[0022] By adopting the technical scheme, when a user uses the device, the feeding motor drives the spiral feeding piece to rotate, and then pushes the leaflets to slide in turn to the direction of the movable pulley, the inserting column and the hanging rod abut, the spiral feeding piece pushes the leaflets to the inserting column, the pushing assembly pushes the leaflets on the feeding plate to be connected and fixed with the connecting assembly and the positioning assembly, and automatic feeding is completed.

[0023] Optionally, the positioning assembly comprises a fixing seat fixed in the detection box, a let-in slot is formed on the fixing seat corresponding to the position of the feeding plate, a second electric push rod is arranged on the fixing seat, an end of the second electric push rod is provided with a fixing column extending into the let-in slot, a locking slot two is formed below the fixing seat, the locking slot two is vertically formed, a second locking spring vertically arranged is arranged in the locking slot two, an end of the second locking spring is fixedly connected with a second locking block, and the top of the second locking block protrudes out of the locking slot two.

[0024] By adopting the above technical scheme, when the feeding plate slides to the position directly above the fixing seat and the fixing column is flush with the plug-in column, the second electric push rod pushes the fixing column to slide into the let-in slot, the fixing column pushes the plug-in column to slide into the accommodating cavity, the feeding plate blocks the leaflet, and the perforation of the leaflet is automatically transmitted on the fixing column. When the feeding plate is retracted, the tension of the second locking spring pushes the second locking block to move downward to the end of the fixing column, so that the leaflet is prevented from falling off the fixing column. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic structural view of the whole structure of the embodiment of the present application; Figure 2 is a sectional view of the embodiment of the present application; Figure 3 is a schematic structural view of the automatic feeding mechanism and the stretching mechanism; Figure 4 is a schematic structural view of the automatic feeding mechanism; Figure 5 is a schematic structural view of the fixing block and the feeding plate; Figure 6 is a schematic structural view of the guide rod, the fixing block and the feeding plate Figure 7 is Figure 6 is an A-A sectional view for highlighting the connecting assembly and the positioning assembly; Figure 8 is Figure 7 is an enlarged view of A part of Figure 9 is Figure 7 is an enlarged view of B part of

[0026] Explanation of reference signs: 1, detection box; 11, through groove; 12, discharge port; 2, stretching mechanism; 21, support frame; 211, guide channel; 212, movable pulley; 22, positioning rod; 221, fixed pulley; 23, pull rope; 24, counterweight; 25, connecting assembly; 251, connecting seat; 252, notch groove; 253, first electric push rod; 254, positioning column; 255, locking groove one; 256, first locking spring; 257, first locking block; 26, positioning assembly; 260, fixed seat; 261, let go slot; 262, second electric push rod; 263, fixed column; 264, locking groove two; 265, second locking spring; 266, second locking block; 27, automatic ejection assembly; 271, fixed rod; 272, sliding groove; 273, support plate; 274, screw rod; 275, drive motor; 3, automatic feeding mechanism; 31, positioning plate; 311, hanging rod; 312, feeding motor; 313, transmission wheel; 314, spiral feeding piece; 32, fixed block; 321, guide groove; 322, guide sleeve; 33, feeding plate; 331, containing cavity; 332, return spring; 333, plug-in column; 334, rack; 335, power motor; 336, gear; 337, guide column; 34, positioning seat; 341, rotating shaft; 342, stirring plate; 343, pushing motor; 4, electronic displacement sensing device; 5, leaflet; 51, perforation. DETAILED DESCRIPTION

[0027] The following will be described in detail in combination with the accompanying drawings. Figures 1-9 The present application is further described in detail.

[0028] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected, or communicated; can be directly connected, or indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In this application, unless otherwise clearly indicated and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0030] The embodiment of the present application discloses a biological valve leaflet screening matching device, referring to Figure 1 and Figure 2 , comprising a detection box 1 and a stretching mechanism 2, an automatic feeding mechanism 3, an electronic displacement sensor device 4 and a computer arranged in the detection box 1. The automatic feeding mechanism 3 automatically transmits the valve leaflet 5 to the stretching mechanism 2. The stretching assembly is used for stretching test of the valve leaflet 5. The electronic displacement sensor device 4 is used for detecting the tensile strength of the valve leaflet 5. The electronic displacement sensor device 4 detects the displacement amount of the counterweight 24 and transmits data to the computer. The screening matching program in the computer can automatically record, screen and match the deformation amount of the valve leaflet 5. Finally, the valve leaflet with similar tensile strength and matching parameters is screened out. Every three valve leaflets 5 are matched to form a group.

[0031] Referring to Figure 2 and Figure 3The stretching mechanism 2 comprises a support frame 21 fixedly connected to the inner top wall of the detection box 1, which is generally made of metal material and has stable structure and can bear certain tension. A vertical guide channel 211 is formed in the support frame 21, and a movable pulley 212 is slidably connected in the guide channel 211. The guide channel 211 guides the movement of the movable pulley 212, so that the movable pulley 212 can only move vertically. The movable pulley 212 can be made of light and wear-resistant plastic material, so as to reduce the influence of its own weight on the detection result. Two positioning rods 22 are arranged on the inner top wall of the detection box 1, which are generally made of solid metal rods such as aluminum alloy rods and have high strength. A fixed pulley 221 is rotatably connected to the positioning rod 22, which can also be made of plastic material. The two fixed pulleys 221 are at the same height, so that the tension rope 23 can slide smoothly thereon. The tension rope 23 can be made of high-strength nylon rope, which has good toughness and is not easy to break. One end of the tension rope 23 is fixedly connected to the top of the support frame 21, and then the tension rope 23 passes through the bottom of the movable pulley 212 and the top of the two fixed pulleys 221 in sequence. Finally, the other end of the tension rope 23 is connected with a counterweight 24, which can be made of cast iron and has stable quality. When the counterweight 24 descends under the action of gravity, it will pull the tension rope 23, and the tension rope 23 drives the movable pulley 212 to move upward, thereby generating a stretching force on the leaflet 5. Due to the action of the movable pulley 212, the displacement of the counterweight 24 is twice that of the leaflet 5, thereby realizing the effect of displacement amplification and facilitating more accurate measurement of the stretching length of the leaflet 5.

[0032] In the drawing, the stretching mechanism 2 is shown as a movable pulley set, but it is not limited to one movable pulley set. Different numbers of movable pulley sets can be connected according to requirements to amplify the stretching displacement of the leaflet 5 by multiple times.

[0033] The detection box 1 is provided with a connecting assembly 25 at the movable pulley 212 and a positioning assembly 26 directly below the movable pulley 212. The stretching mechanism 2 applies tension to the leaflet 5, the automatic feeding mechanism 3 realizes automatic and orderly feeding of the leaflet 5, the connecting assembly 25 and the positioning assembly 26 fix the leaflet 5, the electronic displacement sensor 4 detects the displacement of the counterweight 24 and transmits data to the computer, and the computer records and screens the deformation amount of the leaflet 5. Through the cooperation of the above, the leaflet 5 with similar deformation amount can be accurately screened out.

[0034] The electronic displacement sensor 4 can be a high-precision sensor such as a potentiometer type displacement sensor, an ultrasonic displacement sensor, a Hall type displacement sensor and an inductive displacement sensor, which can accurately detect millimeter-level displacement.

[0035] Referring to Figure 2 and Figure 4The automatic feeding mechanism 3 comprises a positioning plate 31, the side wall of the detection box 1 is provided with a through slot 11, the positioning plate 31 is inserted into the through slot 11, and two hanging rods 311 are symmetrically arranged on the positioning plate 31. The hanging rods 311 are generally metal rods, the surface of the metal rod is smooth, and the leaflets 5 can slide smoothly. The two hanging rods 311 are vertically distributed, the hanging rods 311 are horizontally arranged and the end portions are connected with the connecting assembly 25. The two ends of the leaflet 5 are provided with a through hole 51, and the through hole 51 is used for sleeving the hanging rod 311. The positioning plate 31 is provided with a feeding motor 312 fixedly connected thereto. The feeding motor 312 can be a direct current motor. The output shaft of the feeding motor 312 extends into the positioning plate 31 and is fixedly connected with a transmission wheel 313. The transmission wheel 313 is fixedly connected with a spiral feeding piece 314. The spiral feeding piece 314 is generally made of a metal wire. When the user sequentially hangs the leaflets 5 at the two ends of the hanging rod 311, the feeding motor 312 is powered on to drive the spiral feeding piece 314 to rotate, thereby pushing the leaflets 5 to sequentially slide in the direction of the movable pulley 212, and automatic and orderly feeding is realized.

[0036] With reference to Figure 4 and Figure 5 The detection box 1 is provided with a fixed block 32, the fixed block 32 is slidably connected with a feeding plate 33, the top and bottom of the feeding plate 33 are at the same height as the hanging rod 311, the bottom and top of the feeding plate 33 are provided with an accommodating cavity 331, the end of the accommodating cavity 331 close to the hanging rod 311 is provided with an open end, the accommodating cavity 331 is fixedly connected with a reset spring 332, the reset spring 332 is usually made of carbon steel and has good elasticity, the end of the reset spring 332 close to the open end is provided with an insertion column 333, the insertion column 333 can be made of plastic and has a smooth surface. The insertion column 333 is used for abutting against and supporting the hanging rod 311, the feeding plate 33 is fixedly connected with a rack 334, the rack 334 is generally made of steel and has high gear precision. The fixed block 32 is provided with a guide groove 321, the rack 334 is slidably connected in the guide groove 321, and the guide groove 321 plays a guiding role to ensure the linear motion of the rack 334. The top of the fixed block 32 is fixedly connected with a power motor 335, the power motor 335 can be a servo motor and can accurately control the speed and position. The output shaft of the power motor 335 extends into the guide groove 321 and is fixedly connected with a gear wheel 336, and the gear wheel 336 is engaged with the rack 334. The top and bottom of the feeding plate 33 are provided with guide columns 337, and the top and bottom of the fixed block 32 are provided with guide sleeves 322, and the guide columns 337 are slidably connected in the guide sleeves 322. When the power motor 335 is powered on, the rack 334 is driven to slide, and the rack 334 pushes the feeding plate 33 to slide in the direction of the connecting assembly 25 and the positioning assembly 26. The feeding motor 312 drives the spiral feeding piece 314 to rotate, pushes the leaflets 5 to the insertion column 333, and the pushing assembly pushes the leaflets on the feeding plate 33 to be connected and fixed with the connecting assembly 25 and the positioning assembly 26, and the automatic feeding is completed.

[0037] The positioning seat 34 is fixedly connected to one side of the feeding plate 33 close to the hanging rod 311. The positioning seat 34 can be made of plastic, which is light and easy to install. The rotating shaft 341 is rotatably connected to the positioning seat 34. The rotating shaft 341 is generally a metal shaft, such as a stainless steel shaft, which rotates flexibly. The pushing plate 342 is fixedly connected to the rotating shaft 341. The pushing plate 342 can be made of rubber, which is soft and will not damage the leaflet 5. The top of the positioning seat 34 is fixedly connected to the pushing motor 343. The output shaft of the pushing motor 343 is fixedly connected to the rotating shaft 341. The pushing motor 343 can be a micro motor, which is small in size. When the pushing motor 343 works, the rotating shaft 341 is driven to rotate, and the pushing plate 342 is driven to rotate towards the feeding plate 33, so that the leaflet 5 is pushed from the hanging rod 311 to the insertion column 333, and the leaflet 5 is pressed and fixed to the feeding plate 33, preventing the leaflet 5 from falling off the insertion column 333 during the feeding process of the feeding plate 33.

[0038] Referring to Figure 6 , Figure 7 and Figure 8 , the connecting assembly 25 comprises a connecting seat 251 connected to the movable pulley 212. The bottom of the connecting seat 251 is provided with a notched groove 252. The connecting seat 251 is provided with a first electric push rod 253 at a position corresponding to the notched groove 252. The end of the first electric push rod 253 is provided with a positioning column 254 for abutting with the insertion column 333. The positioning column 254 can be a metal column, such as an aluminum column. The upper portion of the connecting seat 251 is provided with a locking groove one 255 above the notched groove 252. The locking groove one 255 is vertically provided. A vertical first locking spring 256 is arranged in the locking groove one 255. The first locking spring 256 is generally made of carbon steel. The end of the first locking spring 256 is fixedly connected to a first locking block 257. The side of the first locking block 257 facing the feeding plate 33 is provided with an inclined surface. The bottom of the first locking block 257 protrudes out of the locking groove one 255. The first locking block 257 can be a plastic block, which is light in weight. When the feeding plate 33 slides to the position directly below the connecting seat 251, and the positioning column 254 is flush with the insertion column 333, the first electric push rod 253 pushes the insertion column 333 to slide into the notched groove 252, and the positioning column 254 pushes the insertion column 333 to slide into the accommodating cavity 331. The feeding plate 33 blocks the leaflet 5, so that the hanging ear of the leaflet 5 is automatically pierced on the insertion column 333. When the feeding plate 33 is retracted, the tension of the first locking spring 256 pushes the first locking block 257 to move downward to the end of the insertion column 333, preventing the leaflet 5 from falling off the insertion column 333.

[0039] Referring to Figure 7 and Figure 9The positioning assembly 26 comprises a fixed seat 260 fixed in the detection box 1, a let-in slot 261 is formed on the fixed seat 260 corresponding to the position of the feeding plate 33, a second electric push rod 262 is arranged on the fixed seat 260, an end of the second electric push rod 262 is provided with a fixed column 263 extending into the let-in slot 261, and the fixed column 263 can be a metal column. A locking slot two 264 is formed below the fixed seat 260 corresponding to the let-in slot 261, the locking slot two 264 is vertically formed, a vertical second locking spring 265 is arranged in the locking slot two 264, and the second locking spring 265 is also made of carbon steel. An end of the second locking spring 265 is fixedly connected with a second locking block 266, an inclined surface is formed on the side of the second locking block 266 close to the feeding plate 33, and the top of the second locking block 266 protrudes out of the locking slot two 264. When the feeding plate 33 slides to the position directly above the fixed seat 260, the fixed column 263 is flush with the plug-in column 333, the second electric push rod 262 pushes the fixed column 263 to slide into the let-in slot 261, the fixed column 263 pushes the plug-in column 333 to slide into the accommodating cavity 331, the feeding plate 33 blocks the leaflet 5, so that the ear of the leaflet 5 is automatically transmitted on the fixed column 263, and when the feeding plate 33 is retracted, the tension of the second locking spring 265 pushes the second locking block 266 to move downward to the end of the fixed column 263, so that the leaflet 5 is prevented from falling off the fixed column 263.

[0040] In addition, a discharging port 12 is formed on the detection box 1 corresponding to the position of the fixed seat 260, so that the tested valve can be automatically discharged.

[0041] Looking back Figure 2 and Figure 3The detection box 1 is provided with an automatic material lifting assembly 27 corresponding to the position of the counterweight 24, the automatic material lifting assembly 27 comprises a fixed rod 271 fixedly connected in the detection box 1, the fixed rod 271 can be selected from metal pipes such as steel pipes, and the fixed rod 271 provides stable support for the whole assembly. A screw rod 274 is rotationally connected to the side wall of the fixed rod 271, the screw rod 274 is usually made of steel and has threads on the surface. A support plate 273 is threadedly connected to the screw rod 274, the support plate 273 can be made of a steel plate, the fixed rod 271 is vertically arranged, a sliding groove 272 is formed in the fixed rod 271, the support plate 273 passes through the sliding groove 272 and is used for abutting against the bottom of the counterweight 24, and the sliding groove 272 is used for leaving space for movement of the support plate 273. A driving motor 275 is fixedly connected to the fixed rod 271, the driving motor 275 can be a stepping motor and can accurately control the rotation angle. The output shaft of the driving motor 275 is fixedly connected with the screw rod 274, when the driving motor 275 works, the screw rod 274 is driven to rotate, and the rotation of the screw rod 274 drives the support plate 273 to move up and down. When the leaflet 5 is installed, the driving motor 275 drives the support plate 273 to abut against the bottom of the counterweight 24, so that the counterweight 24 is lifted to prevent the pull rope 23 from moving randomly; when detection is performed, the driving motor 275 drives the support plate 273 to move downward, the counterweight 24 drives the pull rope 23 to move under the action of gravity, and the stretching detection of the leaflet 5 is realized, so that the installation of the leaflet 5 is facilitated, and the accuracy of detection is ensured.

[0042] The implementation principle of the embodiment is that the leaflet screening and matching device of the biological valve ingeniously uses a pulley block to amplify the displacement of the leaflet 5, solves the problem that the traditional method is difficult to accurately measure the small stretching length of the leaflet 5, and greatly improves the screening precision. The automatic feeding mechanism 3 realizes automatic and orderly feeding of the leaflet 5, reduces manual operation, and improves work efficiency. The leaflet 5 can be fixedly connected through the connecting assembly 25 and the positioning assembly 26, and the stability of detection is ensured. The automatic material lifting assembly 27 facilitates switching between the installation and detection processes of the leaflet 5. The various components work cooperatively to provide a reliable solution for selecting leaflets 5 with similar deformation amounts in the production of biological valves. Compared with the prior art, the screening precision and work efficiency are significantly improved, and the strict requirement of the biological valve production for the consistency of deformation data of the three leaflets 5 in the same group is met.

[0043] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A biological valve leaflet screening matching device, characterized in that: it comprises a detection box (1), a stretching mechanism (2) is arranged in the detection box (1); the stretching mechanism (2) comprises a plurality of groups of movable pulleys (212) arranged in the detection box (1), the groups of movable pulleys are connected with each other, a pull rope (23) is arranged outside the groups of movable pulleys, one end of the pull rope (23) is fixedly connected to the top wall in the detection box (1), the pull rope (23) sequentially passes through the groups of movable pulleys, the other end of the pull rope (23) is connected with a counterweight (24); a connecting assembly (25) for connecting and fixing the end of a valve leaflet (5) is arranged on the first group of movable pulleys of the detection box (1), a positioning assembly (26) for positioning the other end of the valve is arranged below the first group of movable pulleys of the detection box (1), an automatic feeding mechanism (3) for orderly feeding the valve leaflet (5) is arranged on one side of the movable pulley group of the detection box (1); an electronic displacement sensing device (4) corresponding to the position of the counterweight (24) of the detection box (1) is arranged, the electronic displacement sensing device (4) can detect the displacement of the counterweight (24) in real time and send the detected data to a computer, and a screening and matching program of the computer matches a group of three valve leaflets (5) according to preset screening and matching parameters. Each group of the pulley assembly comprises a support frame (21) fixed to the top wall in the detection box (1), a guide channel (211) is formed in the support frame (21), the guide channel (211) is vertically arranged, a movable pulley (212) is arranged in the guide channel (211), a positioning rod (22) is arranged on the top wall in the detection box (1), a fixed pulley (221) is rotatably connected to the positioning rod (22), the pull rope (23) sequentially passes through the bottom of the movable pulley (212) and the top of the fixed pulley (221).

2. The device for screening and matching of leaflets of a biological valve according to claim 1, characterized in that: The detection box (1) is provided with an automatic top feeding assembly (27) corresponding to the position of the counterweight (24); 3. The device of claim 1, wherein: the automatic top feeding assembly (27) comprises a fixed rod (271) fixedly connected to the detection box (1), the fixed rod (271) is vertically arranged, a sliding groove (272) is formed in the fixed rod (271), a screw rod (274) is rotatably connected to the side wall of the fixed rod (271), a support plate (273) is threadedly connected to the screw rod (274), the support plate (273) passes through the sliding groove (272) and is used for abutting against the bottom of the counterweight (24), a driving motor (275) is fixedly connected to the fixed rod (271), and the output shaft of the driving motor (275) is fixed to the screw rod (274). ​ 4. The device of claim 1, wherein: The side wall of the detection box (1) is provided with a through groove (11), the automatic feeding mechanism (3) comprises a positioning plate (31) which is inserted into the through groove (11), two hanging rods (311) are symmetrically arranged on the positioning plate (31), the two hanging rods (311) are vertically distributed on the positioning plate (31), the hanging rods (311) are horizontally arranged, the ends of the hanging rods (311) are connected with the connecting assembly (25), the both ends of the leaflet (5) are provided with through holes (51), the through holes (51) are respectively sleeved on the hanging rods (311), and the positioning plate (31) is provided with a driving assembly for driving the leaflet (5) to slide along the hanging rod (311) to the connecting assembly (25).

5. The leaflet screening matching device of a biological valve according to claim 4, characterized in that: The driving assembly comprises a feeding motor (312) fixedly connected to the positioning plate (31), the output shaft of the feeding motor (312) extends into the positioning plate (31) and is fixedly connected with a transmission wheel (313), the transmission wheel (313) is fixedly connected with a spiral feeding piece (314), and the leaflet (5) is clamped in the spiral groove of the spiral feeding piece (314).

6. The device of claim 4, wherein: The detection box (1) is provided with a fixing block (32), the fixing block (32) is slidably connected with a feeding plate (33), the top and bottom of the feeding plate (33) are respectively equal in height to the hanging rods (311), the bottom and top of the feeding plate (33) are provided with containing cavities (331), the containing cavities (331) are provided with open ends close to the hanging rods (311), the containing cavities (331) are fixedly connected with return springs (332), one end of the return spring (332) close to the open end is provided with an insertion column (333), the insertion column (333) is used for abutting and supporting on the hanging rod (311), and the fixing block (32) is provided with a pushing assembly for driving the feeding plate (33) to slide to be connected with the connecting assembly (25) and the positioning assembly (26).

7. The device of claim 5, wherein: The pushing assembly comprises a rack (334) fixedly connected to the feeding plate (33), the fixing block (32) is provided with a guide groove (321), the rack (334) is slidably connected in the guide groove (321), the top of the fixing block (32) is fixedly connected with a power motor (335), the output shaft of the power motor (335) extends into the guide groove (321) and is fixedly connected with a gear (336), and the gear (336) and the rack (334) are engaged.

8. The device of claim 7, wherein: The side of the feeding plate (33) close to the hanging rod (311) is fixedly connected with a positioning seat (34), the positioning seat (34) is rotatably connected with a rotating shaft (341), the rotating shaft (341) is fixedly connected with a pushing plate (342), the top of the positioning seat (34) is fixedly connected with a pushing motor (343), and the output shaft of the pushing motor (343) is fixedly connected with the rotating shaft (341).

9. The device of claim 1, wherein: The connecting assembly (25) comprises a connecting seat (251) rotatably connected to the movable pulley (212), the bottom of the connecting seat (251) is provided with a notched groove (252), the connecting seat (251) is provided with a first electric push rod (253) at the position corresponding to the notched groove (252), the end of the first electric push rod (253) is provided with a positioning column (254), and the positioning column (254) is used for abutting against the plug-in column (333); the connecting seat (251) is provided with a locking groove I (255) above the notched groove (252), the locking groove I (255) is vertically provided, a first locking spring (256) vertically arranged is arranged in the locking groove I (255), the end of the first locking spring (256) is fixedly connected with a first locking block (257), and the bottom of the first locking block (257) protrudes out of the locking groove I (255).

10. The leaflet screening matching device of a biological valve according to claim 1, characterized in that: The positioning assembly comprises a fixing seat (260) fixedly arranged in the detection box (1), the fixing seat (260) is provided with a letting go groove (261) corresponding to the position of the feeding plate (33), the fixing seat (260) is provided with a second electric push rod (262), the end of the second electric push rod (262) is provided with a fixing column (263) extending into the letting go groove (261); the fixing seat (260) is provided with a locking groove II (264) below the letting go groove (261), the locking groove II (264) is vertically provided, a second locking spring (265) vertically arranged is arranged in the locking groove II (264), the end of the second locking spring (265) is fixedly connected with a second locking block (266), and the top of the second locking block (266) protrudes out of the locking groove II (264).

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