A multi-group test sample synchronous vortex mixing device

Abstract

The application discloses a kind of multiple groups of test sample synchronous vortex mixing devices, comprising: base, the top of the base is connected with mounting box by damping mechanism, and mounting box top is provided with bearing table, the inside of mounting box is fixed with mounting bracket, and the inside of mounting bracket is fixed with motor, and the output of motor is provided with main shaft.The test tube is put into the tube hole, and a sealed environment is formed by the rubber ring.The higher the speed, the greater the distance of the two sides of the sleeve to the outside, and the sleeve is pulled down along the main shaft by the pull rod, which drives the lifting disc to pull the piston rod of each group of suction cylinders, expands the volume of the suction cylinder, and forms a negative pressure environment in the tube hole.The centrifugal force is small and the negative pressure is weak during the low-speed start-stop stage, so the test tube is not locked, the mixing swing amplitude is ensured, the negative pressure is synchronized to increase during high-frequency operation, and the test tube is firmly adsorbed at the bottom to avoid bouncing and deviation.

Description

Technical Field

[0001] This invention relates to a device for synchronous vortex mixing of multiple sets of test samples, belonging to the field of pharmacokinetic experimental technology. Background Technology

[0002] In fields such as biological detection, chemical experiments, and drug development, vortex mixing of test tube samples is a fundamental pretreatment step. Vortex mixing devices, with their high-frequency reciprocating oscillation characteristics, can quickly achieve uniform mixing of sample solutions and reagents, and are widely used in various laboratory testing scenarios. Currently, most multi-unit synchronous vortex mixing devices on the market employ an eccentric wheel and connecting rod drive structure to drive the stage to oscillate at high frequency, thereby achieving simultaneous mixing of multiple samples.

[0003] During high-frequency oscillation, the test tubes in existing mixing devices are subjected to continuous alternating forces of reciprocating inertia and centrifugal force. The limiting and locking capabilities of conventional rigid clamps and simple locking structures are limited, and the clamping contact surfaces are prone to slippage and loosening. This leads to unstable phenomena such as test tubes bouncing up and down, shaking left and right, and circumferential displacement. Abnormal shaking of the test tubes not only causes uneven sample mixing uniformity, but in severe cases, test tubes may also tilt, fall off, or break, resulting in waste of experimental samples and potential safety hazards to the equipment. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a multi-group test sample synchronous vortex mixing device, which realizes adaptive adjustment of the fixing and locking effect on the test tube according to different oscillation frequencies of the equipment, and avoids instability problems such as test tube bouncing, shaking, and displacement.

[0005] The technical solution adopted by this invention to solve its technical problem is: A multi-group test sample synchronous vortex mixing device includes: a base, a mounting box connected to the top of the base via a shock-absorbing mechanism, a support platform above the mounting box, a mounting frame fixed inside the mounting box, a motor fixed inside the mounting frame, a main shaft at the output end of the motor, an eccentric wheel at the top of the main shaft, a swing slide at the top of the mounting box, the eccentric wheel located in the swing slide, the swing slide connected to the support platform, several sets of pipe holes on the support platform, rubber rings installed in the pipe holes, a sliding section on the main shaft, a sleeve slidably fitted on the sliding section, a lifting plate rotatably fitted on the outside of the sleeve via a bearing, several sets of suction cylinders fixed to the top of the mounting box, piston rods installed inside the suction cylinders, piston rods connected to the lifting plate, the suction cylinders connected to a circular pipe via suction pipes, the circular pipe communicating with the suction hole at the bottom of the pipe hole, a one-way valve installed on the outside of the pipe hole, and lifting mechanisms on both sides of the main shaft that use centrifugal force to drive the lifting plate vertically.

[0006] Preferably, the air extraction cylinder is provided with multiple sets arranged around the central axis of the lifting plate, and the piston rod passes through the bottom of the lifting plate and is fitted with a spring, with the two ends of the spring connected to the bottom of the piston rod and the lifting plate respectively.

[0007] Preferably, the lifting mechanism includes a crossbar, which is fixed to both sides of the bottom of the main shaft, and a sliding sleeve is slidably sleeved on the crossbar. The sliding sleeve is hinged to the sleeve through a pull rod. A tension spring is sleeved on the crossbar, and the two ends of the tension spring are respectively connected to the main shaft and the sliding sleeve.

[0008] Preferably, a counterweight is fixed at the bottom of the sliding sleeve, and self-lubricating mechanisms for lubricating the sliding sleeve are provided on both sides of the main shaft.

[0009] Preferably, the self-lubricating mechanism includes a fixed rod, which is fixed to both sides of the bottom of the main shaft, and trigger blocks are fixed at both ends of the fixed rod. Oil storage pipes are fixed to both sides of the sliding sleeve, and the oil storage pipes are connected to the sliding sleeve. An oil drain ring is fixed inside the oil storage pipe, and a push rod is provided through one end of the oil storage pipe. A sealing plate is fixed to one end of the push rod that passes through the oil drain ring. A second spring is sleeved on the push rod, and the two ends of the second spring are respectively connected to the inner wall of the oil storage pipe and the push rod.

[0010] Preferably, the damping mechanism includes a damping spring, the two ends of which are fixedly connected to the base and the mounting box respectively, and a damper is fixed at the midpoint of the base. A damping piston is provided on the damper, and an adjustment mechanism for adjusting the damping magnitude is also provided on the base.

[0011] Preferably, the adjustment mechanism includes a slide groove, which is opened on both sides of the base, and a movable plate is slidably connected in the slide groove. A guide groove is obliquely opened on the movable plate. An arc-shaped frame is fixed to the side of the movable plate by a connecting rod, and a friction bushing is fixed to the inner wall of the arc-shaped frame. A vertical rod is slidably connected through the bottom of the mounting box. The vertical rod is connected to the lifting plate, and a shift fork is fixed to the bottom of the vertical rod. The bottom of the shift fork is inserted into the guide groove. A tension spring is sleeved on the bottom of the vertical rod, and the two ends of the tension spring are respectively connected to the bottom of the mounting box and the top of the shift fork.

[0012] Preferably, the arc-shaped frame is provided in two sets, and electromagnets are provided on both sides of the two sets of arc-shaped frames. A speed sensor is provided at the bottom of the main shaft. A controller is provided inside the mounting box, and the controller is electrically connected to the speed sensor and the electromagnets.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: After the test tube is placed in the tube hole, a sealed environment is formed by the rubber ring. When the main shaft rotates, the counterweight of the sliding sleeve generates centrifugal force. The higher the speed, the greater the distance the sliding sleeves on both sides slide outward. The sliding sleeve pulls the sleeve along the main shaft downward via the pull rod, which drives the lifting plate to pull down the piston rods of each set of suction cylinders in sync, expanding the volume of the suction cylinders and forming a negative pressure environment in the tube hole. During the low-speed start-stop phase, the centrifugal force is small and the negative pressure is weak, so the test tube will not be locked, ensuring the mixing swing amplitude. During high-frequency operation, the negative pressure increases synchronously, firmly adhering to the bottom of the test tube, avoiding the test tube from bouncing or shifting, and improving the mixing consistency. This technical solution relies on the centrifugal force generated by the rotation of the main shaft to drive the entire mechanism. The speed increases automatically increases the negative pressure adsorption force at the bottom of the test tube, and the speed decreases automatically weakens the negative pressure. The suction force is automatically adjusted adaptively, without the need for manual tightening, replacement of clamps, or other manual intervention operations.

[0014] When the main shaft rotates, its bottom speed sensor collects the operating speed in real time. When a high-speed condition is detected, the controller automatically energizes the electromagnet. At the same time, the centrifugal force at high speed drives the lifting plate to move downward synchronously. The lifting plate presses down the vertical rod, and the fork at the bottom of the vertical rod slides along the guide groove of the movable plate, pushing the two movable plates to move closer together. This causes the two sets of arc-shaped frames to move closer to each other. The energized electromagnet generates a magnetic attraction force, firmly attracting the two arc-shaped frames together. The friction bushings on the inner wall of the arc-shaped frames tightly hold the damping piston, greatly increasing the frictional resistance of the motion, improving the damping of the whole machine, and efficiently dissipating high-frequency vibration. During the low-speed and shutdown phases of the equipment, the speed sensor determines the low speed, the controller cuts off the power supply to the electromagnet, the two sets of arc-shaped frames separate, the friction bushings release the damping piston, and the damping automatically decreases, making it easier to smoothly pass through the resonance range. This technical solution can further reduce test tube shaking, while reducing the alternating impact of the main shaft, eccentric wheel and other transmission components, and extending the service life of the equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a cross-sectional view of the mounting box of the present invention; Figure 3 This is a top view schematic diagram of the support platform and swing slide of the present invention; Figure 4 This is a bottom view of the support platform and circular tube structure of the present invention; Figure 5 This is a schematic diagram of the main shaft and lifting plate structure of the present invention; Figure 6 This is a top view of the lifting plate structure of the present invention; Figure 7 This is a side view cross-sectional structural diagram of the oil storage pipe of the present invention; Figure 8 This is a top view of the base structure of the present invention; Figure 9 This is a side view of the movable plate and shift fork structure of the present invention.

[0017] In the diagram: 1. Base, 2. Mounting box, 3. Support platform, 4. Mounting bracket, 5. Motor, 6. Main shaft, 7. Eccentric wheel, 8. Swing slide, 9. Pipe hole, 10. Rubber ring, 11. Sliding section, 12. Sleeve, 13. Lifting plate, 14. Evacuation cylinder, 15. Piston rod, 16. Spring 1, 17. Evacuation pipe, 18. Round pipe, 19. One-way valve, 20. Crossbar, 21. Sliding sleeve, 22. Tie rod, 23. Tension spring 1, 24. Counterweight. 25. Fixed rod, 26. Trigger block, 27. Oil reservoir pipe, 28. Oil drain ring, 29. Top rod, 30. Sealing plate, 31. Spring II, 32. Shock absorber spring, 33. Damper, 34. Damping piston, 35. Slide groove, 36. Movable plate, 37. Guide groove, 38. Connecting rod, 39. Arc frame, 40. Friction bushing, 41. Vertical rod, 42. Shift fork, 43. Tension spring II, 44. Electromagnet, 45. Speed ​​sensor, 46. Controller. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-9 The present invention provides a technical solution: A multi-group test sample synchronous vortex mixing device includes: a base 1, a mounting box 2 connected to the top of the base 1 via a shock-absorbing mechanism, a support platform 3 mounted above the mounting box 2, a mounting frame 4 fixed inside the mounting box 2, a motor 5 fixed inside the mounting frame 4, a main shaft 6 mounted at the output end of the motor 5, an eccentric wheel 7 mounted on the top of the main shaft 6, a swing slide 8 mounted on the top of the mounting box 2, the eccentric wheel 7 located in the swing slide 8, and the swing slide 8 connected to the support platform 3, the support platform 3 having several sets of pipe holes 9, and rubber rings 10 installed in the pipe holes 9. A sliding section 11 is provided on the main shaft 6, and a sleeve 12 is slidably sleeved on the sliding section 11. A lifting plate 13 is rotatably sleeved on the outside of the sleeve 12 through a bearing. Several sets of suction cylinders 14 are fixed on the top of the mounting box 2. A piston rod 15 is provided inside the suction cylinder 14. The piston rod 15 is connected to the lifting plate 13. The suction cylinder 14 is connected to the round pipe 18 through the suction pipe 17. The round pipe 18 is connected to the suction hole at the bottom of the pipe hole 9. A one-way valve 19 is provided on the outside of the pipe hole 9. Lifting mechanisms that use centrifugal force to drive the lifting plate 13 to move vertically are provided on both sides of the main shaft 6.

[0020] Furthermore, the base 1 serves as the support base for the entire machine, relying on the shock absorption mechanism to support the mounting box 2, reducing the transmission of vibration from the entire machine to the ground. The motor 5 outputs torque to drive the main shaft 6 and the eccentric wheel 7 to rotate synchronously. The eccentric wheel 7 continuously squeezes the swing slide 8, converting the rotational motion into high-frequency reciprocating oscillation of the support platform 3, realizing vortex mixing of the test tubes. The multiple sets of tube holes 9 of the support platform 3 are used to place the test tubes. The rubber ring 10 inside the tube hole 9 provides lateral flexible clamping for the test tubes, buffering the circumferential sliding and shaking of the test tubes. On the other hand, it tightly fits the outer wall of the test tubes, forming a sealed space inside the tube hole 9 to ensure that there is no air leakage during negative pressure extraction and to stably maintain the adsorption negative pressure. The outer ring of the sleeve 12 passes through the shaft. The lifting plate 13 is mounted on the bearing, which isolates the rotational torque. When the main shaft 6 and sleeve 12 rotate, the lifting plate 13 will not rotate synchronously. The lifting plate 13 is connected to the piston rod 15 inside all the air extraction cylinders 14. When the lifting plate 13 moves down, the piston rod 15 is pulled down synchronously, expanding the volume of the inner cavity of the air extraction cylinder 14. Air is drawn out from the bottom of the tube hole 9 through the air extraction pipe 17 and the round pipe 18, forming a negative pressure adsorption force at the bottom of the test tube. The one-way valve 19 isolates the backflow of external air and maintains the stability of the negative pressure inside the tube hole 9. The main shaft 6 is equipped with lifting mechanisms on both sides. The centrifugal force generated by the rotation of the main shaft 6 drives the lifting plate 13 to move down automatically, so that the negative pressure adsorption force changes automatically with the rotation speed.

[0021] It should be noted that the outer wall of the sliding section 11 and the inner wall of the sleeve 12 are a matching polygonal structure. The polygonal fit can stably transmit the rotational torque of the main shaft 6, ensuring that the sleeve 12 rotates synchronously with the main shaft 6. At the same time, the polygonal has no axial limit, and the sleeve 12 can slide up and down and rotate freely along the sliding section 11.

[0022] Please see Figure 1 and Figure 5 In this embodiment: the air extraction cylinder 14 is provided with multiple sets of air extraction cylinders arranged around the central axis of the lifting plate 13. The piston rod 15 passes through the bottom of the lifting plate 13 and is fitted with a spring 16. The two ends of the spring 16 are respectively connected to the bottom of the piston rod 15 and the lifting plate 13.

[0023] Furthermore, multiple sets of suction cylinders 14 are evenly arranged around the center of the lifting plate 13. The multiple cylinders simultaneously suction air, and more air can be extracted by relying only on the small vertical stroke of the lifting plate 13. A greater negative pressure suction force is obtained in a shorter stroke, which improves the adsorption and fastening effect at the bottom of the test tube. When the air inside the suction cylinder 14 is completely evacuated and the negative pressure reaches its limit, the piston rod 15 will be firmly adsorbed and locked by the negative pressure and cannot be pulled down further. At this time, the lifting plate 13 can continue to compress the spring 16 downwards without being restricted by the locked piston rod 15, ensuring that the lifting plate 13 can still descend normally and synchronously link the lower vertical rod 41 to complete the damping adjustment action, so as not to be stuck due to negative pressure saturation.

[0024] Please see Figure 2 , Figure 5 and Figure 6 In this embodiment: the lifting mechanism includes a crossbar 20, which is fixed to the bottom sides of the main shaft 6, and a sliding sleeve 21 is slidably sleeved on the crossbar 20. The sliding sleeve 21 is hinged to the sleeve 12 through a pull rod 22. A tension spring 23 is sleeved on the crossbar 20, and the two ends of the tension spring 23 are respectively connected to the main shaft 6 and the sliding sleeve 21.

[0025] Furthermore, the crossbar 20 is horizontally fixed on both sides of the main shaft 6 and rotates synchronously with the main shaft 6. When the main shaft 6 rotates, the sliding sleeve 21 is subjected to centrifugal force and slides away from both sides along the crossbar 20. The sliding sleeve 21 pulls the sleeve 12 downward through the hinged pull rod 22. The sleeve 12 moves downward along the sliding section 11 of the main shaft 6 by means of polygonal fit, and synchronously drives the lifting plate 13 downward. After the machine stops, the rotation speed of the main shaft 6 disappears, the tension spring 23 pulls the sliding sleeve 21 inward, and the sliding sleeve 21 retracts along the crossbar 20 towards the main shaft 6. The sleeve 12 and the lifting plate 13 are lifted upward by the pull rod 22 and reset as a whole, and the negative pressure is released synchronously.

[0026] Please see Figure 2 In this embodiment: a counterweight 24 is fixed at the bottom of the sliding sleeve 21, and self-lubricating mechanisms for lubricating the sliding sleeve 21 are provided on both sides of the main shaft 6.

[0027] Furthermore, the counterweight 24 is rigidly fixed to the bottom of the sliding sleeve 21, increasing the overall mass of the sliding sleeve 21. Under the same rotation speed, it can increase the centrifugal force, the sliding sleeve 21 has a larger outward stroke, the sleeve 12 has a longer downward distance, and the negative pressure adsorption force is stronger. The matching self-lubricating mechanism continuously supplies lubricating oil to the sliding contact surface between the sliding sleeve 21 and the crossbar 20, avoiding dry friction, jamming, abnormal noise, and excessive wear of parts during high-speed reciprocating sliding.

[0028] It should be noted that the bottom of the sliding sleeve 21 has a detachable counterweight 24, which can be increased or decreased according to the test tube capacity and the weight of the liquid loaded. For large-capacity heavy-load test tubes, the counterweight can be increased to increase the centrifugal thrust and increase the negative pressure adsorption force at the same speed.

[0029] Please see Figure 6 and Figure 7 In this embodiment: the self-lubricating mechanism includes a fixed rod 25, which is fixed to both sides of the bottom of the main shaft 6, and trigger blocks 26 are fixed at both ends of the fixed rod 25. Oil storage pipes 27 are fixed on both sides of the sliding sleeve 21, and the oil storage pipes 27 are connected to the sliding sleeve 21. An oil drain ring 28 is fixed inside the oil storage pipe 27, and a push rod 29 is provided through one end of the oil storage pipe 27. A sealing plate 30 is fixed at one end of the push rod 29 that passes through the oil drain ring 28. A spring 31 is sleeved on the push rod 29, and the two ends of the spring 31 are connected to the inner wall of the oil storage pipe 27 and the push rod 29, respectively.

[0030] Furthermore, the fixed rod 25 is fixed to the bottom of the main shaft 6, and trigger blocks 26 are respectively installed at both ends of the rod. When the sliding sleeve 21 rotates and slides back and forth with the main shaft 6, the push rods 29 on both sides of the sliding sleeve 21 will periodically hit the trigger blocks 26. The push rods 29 are compressed by the impact force, which compresses the second spring 31 and drives the sealing plate 30 to disengage from the oil drain ring 28. The lubricating oil inside the oil storage pipe 27 flows through the oil drain ring 28 into the mating surface between the sliding sleeve 21 and the cross rod 20 to achieve lubrication. Oil will only be discharged when the push rod 29 contacts and squeezes the trigger block 26. After the sliding sleeve 21 slides to disengage from the trigger block 26, the second spring 31 rebounds and pushes the push rod 29 to reset. The sealing plate 30 re-seals the oil drain ring 28, stops the oil supply, and avoids continuous leakage of lubricating oil, which would cause oil waste. The oil storage pipe 27 is connected to the inside of the sliding sleeve 21 to ensure that the lubricating oil reaches the friction pair directly.

[0031] Please see Figure 8 and Figure 9 In this embodiment: the damping mechanism includes a damping spring 32, the two ends of which are fixedly connected to the base 1 and the mounting box 2 respectively, and a damper 33 is fixed at the midpoint of the base 1. A damping piston 34 is provided on the damper 33, and an adjustment mechanism for adjusting the damping magnitude is also provided on the base 1.

[0032] Furthermore, multiple damping springs 32 are connected to the base 1 and the mounting box 2 respectively to buffer low-frequency large-amplitude whole machine vibration; a damper 33 is vertically installed in the center of the base 1, and the damping piston 34 is built into the damper 33, relying on the damping medium to consume vibration energy; the base 1 is equipped with an independent adjustment mechanism, which can change the lateral clamping friction force on the damping piston 34, so as to realize the adjustable damping magnitude and adapt to different speed conditions.

[0033] Please see Figure 8 and Figure 9In this embodiment: the adjustment mechanism includes a slide groove 35, which is opened on both sides of the base 1, and a movable plate 36 is slidably connected in the slide groove 35. A guide groove 37 is obliquely opened on the movable plate 36. An arc frame 39 is fixed to the side of the movable plate 36 through a connecting rod 38, and a friction bushing 40 is fixed to the inner wall of the arc frame 39. A vertical rod 41 is slidably connected through the bottom of the mounting box 2. The vertical rod 41 is connected to the lifting plate 13, and a fork 42 is fixed to the bottom of the vertical rod 41. The bottom of the fork 42 is inserted in the guide groove 37. A tension spring 43 is sleeved on the bottom of the vertical rod 41, and the two ends of the tension spring 43 are respectively connected to the bottom of the mounting box 2 and the top of the fork 42.

[0034] Furthermore, when the lifting plate 13 moves downward synchronously with the sleeve 12, it presses down on the vertical rod 41. The vertical rod 41 slides downward, and the insert of the bottom fork 42 slides along the movable plate 36 obliquely towards the guide groove 37. The oblique surface squeezes and pushes the two movable plates 36 along the sliding groove 35 of the base 1 towards the center. The movable plates 36 drive the arc frame 39 to move closer together via the connecting rod 38. The friction bushing 40 on the inner side of the arc frame 39 fits and hugs the damping piston 34, increasing the frictional resistance of the damping piston 34 and improving the vibration reduction effect. After the speed decreases, the lifting plate 13 rises upward and no longer presses down on the vertical rod 41. The tension spring 43 pulls the fork 42 and the vertical rod 41 back to their original positions. The fork 42 retracts along the guide groove 37, and the two movable plates 36 and the arc frame 39 separate from each other. The friction bushing 40 releases the damping piston 34, and the damping automatically decreases, making it easier for the equipment to smoothly pass through the resonance zone.

[0035] Please see Figure 8 and Figure 9 In this embodiment: two sets of arc-shaped frames 39 are provided, and electromagnets 44 are provided on both sides of the two sets of arc-shaped frames 39. A speed sensor 45 is provided at the bottom of the main shaft 6. A controller 46 is provided inside the mounting box 2, and the controller 46 is electrically connected to the speed sensor 45 and the electromagnets 44.

[0036] Furthermore, the speed sensor 45 at the bottom of the main spindle 6 collects the real-time rotational speed of the main spindle 6 and transmits the speed signal to the controller 46. When the sensor 45 detects that the equipment is in the high-speed working range, the controller 46 automatically outputs current to energize the electromagnet 44. At the same time, under the high-speed working condition, the lifting plate 13 moves downward, and the two sets of arc-shaped frames 39 are pushed closer to each other in advance through mechanical linkage. After being energized, the electromagnet 44 generates a magnetic attraction force, which firmly attracts and adheres the arc-shaped frames 39 on both sides, further pressing the inner wall friction bushing 40, increasing the clamping friction force on the damping piston 34, and greatly improving the high-frequency vibration damping. When the speed drops to a low speed or the machine stops, the speed sensor 45 sends a low speed signal to the controller 46, and the controller 46 automatically cuts off the power supply to the electromagnet 44. The magnetic attraction force disappears, the arc-shaped frame 39 is no longer magnetically restrained, and can smoothly separate and release the damping piston 34 with the tension spring 43, and the damping automatically decreases.

[0037] It should be noted that when the two sets of arc-shaped frames 39 are close to the magnetic attraction range, the electromagnet 44 can independently attract the two sets of arc-shaped frames 39 and hold the damping piston 34 by relying on the magnetic attraction force. There is no need for the lifting plate 13 to continuously apply a large downward pressure to the vertical rod 41 to maintain the arc-shaped frames in a close-fitting state. Only the slight downward pressure of the lifting plate 13 is needed to push the vertical rod 41 and the movable plate 36 to complete the closing action. There will be no problem that the lifting plate 13 has insufficient pushing force and cannot push the vertical rod 41.

[0038] The workflow of this embodiment is as follows: After the equipment is started, the motor 5 is fixed by the mounting bracket 4 and outputs torque to drive the main shaft 6 to rotate continuously. The eccentric wheel 7 at the upper end of the main shaft 6 rotates accordingly and continuously acts on the swing slide 8, converting the rotational motion into reciprocating swing, which in turn drives the support platform 3 to achieve high-frequency vortex oscillation. The test tube placed inside the tube hole 9 of the support platform 3 then undergoes a mixing operation. The rubber ring 10 installed inside the tube hole 9 provides lateral flexible clamping for the test tube, restricting the circumferential sliding of the test tube. On the other hand, it tightly fits the outer wall of the test tube, sealing the gap to form a sealed cavity, ensuring that there is no air leakage during the negative pressure establishment process. The main shaft 6 is provided with a sliding section 11 with a polygonal shape, and the inner wall of the sleeve 12 matches it, so that the sleeve 12 can rotate synchronously with the main shaft 6 and slide freely along the axial direction. The outer side of the sleeve 12 is equipped with a lifting plate 13 through a bearing to ensure that the lifting plate 13 only moves vertically and does not rotate with the main shaft. The main shaft 6 has horizontally fixed crossbars 20 on both sides. Sliding sleeves 21 with counterweights 24 are slidably installed on the crossbars 20. As the rotational speed of the main shaft 6 increases, the sliding sleeves 21 slide to both sides under the action of centrifugal force, overcoming the tension of the tension spring 23. The sliding sleeves 21 pull the sleeve 12 down along the sliding section 11 through the hinged pull rod 22. The sleeve 12 drives the lifting plate 13 to move down synchronously. The lifting plate 13 pulls the piston rods 15 inside the multiple sets of air suction cylinders 14 arranged in a circle, expanding the internal volume of the air suction cylinder 14. Air is drawn out from the bottom of the tube hole 9 through the air suction pipe 17 and the round pipe 18 in sequence, forming a negative pressure at the bottom of the test tube to achieve adsorption and fixation. The multiple sets of air suction cylinders 14 can achieve a larger air suction volume within the limited vertical stroke of the lifting plate 13 and quickly establish an effective negative pressure. A spring 16 is installed between the bottom end of the piston rod 15 and the lifting plate 13. When the negative pressure in the pipe hole 9 reaches the limit and the piston rod 15 is locked by the negative pressure and cannot continue to move down, the lifting plate 13 can still compress the spring 16 to continue to move down, without blocking the subsequent mechanism linkage. The one-way valve 19 in the pipeline can prevent external air from flowing back in and continuously maintain the negative pressure inside the pipe hole 9. As the lifting plate 13 moves downward, it presses the vertical rod 41 to slide downward. The fork 42 at the bottom of the vertical rod 41 is inserted into the guide groove 37 of the movable plate 36. The vertical displacement of the vertical rod 41 is converted into the horizontal movement of the two movable plates 36 along the slide groove 35 by the inclined plane transmission. The movable plate 36 drives the two sets of arc frames 39 to move closer to each other through the connecting rod 38. The friction bushing 40 is fixed on the inner wall of the arc frame 39. The speed sensor 45 at the bottom of the main shaft 6 collects the speed signal in real time and transmits it to the controller 46. When the identification equipment is in a high speed condition, the controller 46 controls the electromagnet 44 to be energized. The lifting plate 13 only needs to push the arc frame 39 to move into the effective magnetic attraction range. The electromagnet 44 can automatically attract the two sets of arc frames 39 by magnetic attraction, so that the friction bushing 40 hugs the damping piston 34 to increase the damping. There is no need for the lifting plate 13 to continuously apply a large downward pressure to maintain the locked state, avoiding the phenomenon that the lifting plate has insufficient thrust and cannot push the vertical rod 41. The shock-absorbing spring 32 on the base 1, together with the damper 33 and the damping piston 34, forms a composite shock absorption system to dissipate the vibration energy of the whole machine. During equipment operation, the sliding sleeve 21 continuously slides back and forth with the main shaft 6. The push rod 29 on the sliding sleeve 21 will periodically strike the trigger blocks 26 at both ends of the fixed rod 25. The impact force pushes the push rod 29 to compress the second spring 31, the sealing plate 30 disengages from the oil drain ring 28, and the lubricating oil inside the oil storage pipe 27 flows out to lubricate the friction pair between the sliding sleeve 21 and the crossbar 20. When the push rod 29 disengages from the trigger block 26, the second spring 31 pushes the push rod 29 to reset, and the sealing plate 30 re-seals the oil drain ring 28 to stop the oil supply, realizing intermittent quantitative lubrication and preventing continuous leakage and waste of lubricating oil. When the equipment speed decreases or stops, the centrifugal force on the sliding sleeve 21 disappears, and the tension spring 23 pulls the sliding sleeve 21 to retract towards the main shaft 6. Through the pull rod 22, the sleeve 12 and the lifting plate 13 are driven to return to their original positions. The spring 16 simultaneously pulls the piston rod 15 upward, compressing the vacuum cylinder 14 and releasing the negative pressure in the pipe hole 9. The test tube is released from adsorption. At the same time, the controller 46 cuts off the power supply to the electromagnet 44, and the magnetic attraction force disappears. The tension spring 43 pulls the shift fork 42 upward and the vertical rod 41 to return to their original positions. The two arc-shaped frames 39 on both sides separate from each other, and the friction bushing 40 releases the damping piston 34. The overall damping of the machine is reduced, completing one complete work cycle.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for synchronous vortex mixing of multiple sets of test samples, characterized in that, include: A base (1) is provided with a mounting box (2) connected to the top of the base (1) via a shock-absorbing mechanism. A support platform (3) is provided above the mounting box (2). A mounting frame (4) is fixed inside the mounting box (2), and a motor (5) is fixed inside the mounting frame (4). A main shaft (6) is provided at the output end of the motor (5), and an eccentric wheel (7) is provided at the top of the main shaft (6). A swing slide (8) is provided at the top of the mounting box (2). The eccentric wheel (7) is located in the swing slide (8), and the swing slide (8) is connected to the support platform (3). Several sets of pipe holes (9) are provided on the support platform (3), and rubber rings (10) are provided in the pipe holes (9). A main shaft (6) is provided with... A sliding section (11) is provided, on which a sleeve (12) is slidably sleeved, and a lifting plate (13) is rotatably sleeved on the outside of the sleeve (12) through a bearing. Several sets of suction cylinders (14) are fixed on the top of the mounting box (2), and a piston rod (15) is provided inside the suction cylinder (14). The piston rod (15) is connected to the lifting plate (13). The suction cylinder (14) is connected to the round pipe (18) through the suction pipe (17), and the round pipe (18) is connected to the suction hole at the bottom of the pipe hole (9). A one-way valve (19) is provided on the outside of the pipe hole (9). Lifting mechanisms that use centrifugal force to drive the lifting plate (13) to move vertically are provided on both sides of the main shaft (6).

2. The device for synchronous vortex mixing of multiple test samples according to claim 1, characterized in that, The air extraction cylinder (14) is provided with multiple sets of air extraction cylinders arranged around the central axis of the lifting plate (13). The piston rod (15) passes through the bottom of the lifting plate (13) and is fitted with a spring (16). The two ends of the spring (16) are respectively connected to the bottom of the piston rod (15) and the lifting plate (13).

3. The device for synchronous vortex mixing of multiple test samples according to claim 1, characterized in that, The lifting mechanism includes a crossbar (20), which is fixed to both sides of the bottom of the main shaft (6). A sliding sleeve (21) is slidably sleeved on the crossbar (20). The sliding sleeve (21) is hinged to the sleeve (12) through a pull rod (22). A tension spring (23) is sleeved on the crossbar (20), and the two ends of the tension spring (23) are respectively connected to the main shaft (6) and the sliding sleeve (21).

4. The device for synchronous vortex mixing of multiple test samples according to claim 3, characterized in that, The bottom of the sliding sleeve (21) is fixed with a counterweight (24), and the two sides of the main shaft (6) are provided with a self-lubricating mechanism for lubricating the sliding sleeve (21).

5. The device for synchronous vortex mixing of multiple test samples according to claim 4, characterized in that, The self-lubricating mechanism includes a fixed rod (25), which is fixed on both sides of the bottom of the main shaft (6), and trigger blocks (26) are fixed at both ends of the fixed rod (25). Oil storage pipes (27) are fixed on both sides of the sliding sleeve (21), and the oil storage pipes (27) are connected to the sliding sleeve (21). An oil drain ring (28) is fixed inside the oil storage pipe (27), and a push rod (29) is provided through one end of the oil storage pipe (27). A sealing plate (30) is fixed at one end of the push rod (29) through the oil drain ring (28). A spring (31) is sleeved on the push rod (29), and the two ends of the spring (31) are connected to the inner wall of the oil storage pipe (27) and the push rod (29) respectively.

6. The device for synchronous vortex mixing of multiple test samples according to claim 1, characterized in that, The damping mechanism includes a damping spring (32), the two ends of which are fixedly connected to the base (1) and the mounting box (2) respectively. A damper (33) is fixed at the midpoint of the base (1), and a damping piston (34) is provided on the damper (33). An adjustment mechanism for adjusting the damping magnitude is also provided on the base (1).

7. The device for synchronous vortex mixing of multiple test samples according to claim 1, characterized in that, The adjustment mechanism includes a slide groove (35), which is located on both sides of the base (1). A movable plate (36) is slidably connected in the slide groove (35). A guide groove (37) is obliquely opened on the movable plate (36). An arc frame (39) is fixed to the side of the movable plate (36) by a connecting rod (38). A friction bushing (40) is fixed to the inner wall of the arc frame (39). A vertical rod (41) is slidably connected through the bottom of the mounting box (2). The vertical rod (41) is connected to the lifting plate (13). A fork (42) is fixed to the bottom of the vertical rod (41). The bottom of the fork (42) is inserted into the guide groove (37). A tension spring (43) is sleeved on the bottom of the vertical rod (41). The two ends of the tension spring (43) are respectively connected to the bottom of the mounting box (2) and the top of the fork (42).

8. The device for synchronous vortex mixing of multiple test samples according to claim 7, characterized in that, The arc frame (39) is provided in two sets, and electromagnets (44) are provided on both sides of the two sets of arc frames (39). A speed sensor (45) is provided at the bottom of the main shaft (6). A controller (46) is provided inside the mounting box (2), and the controller (46) is electrically connected to the speed sensor (45) and the electromagnets (44).

Images