Auxiliary device for rotating speed calibration of superspeed centrifuge

Abstract

The utility model provides an auxiliary device for calibrating the rotating speed of an ultra-high-speed centrifuge, which solves the problem that a table is unstable and shakes when a liquid sample is replaced in the conventional centrifuge, and adopts the scheme that the auxiliary device comprises a bracket, a positioning piece vertically fixed at the top of the bracket, and a sliding rail taking the height direction of the bracket as a rail direction, the positioning piece comprises a servo air cylinder, a connecting block, a telescopic positioning rod and a positioning block, the output end of the servo air cylinder and the connecting block are connected into a whole, the face, close to the support, of the connecting block is slidably connected with the sliding rail through a sliding block, and two shaft sleeves are symmetrically fixed to the other face of the connecting block; the shaft sections, exposed out of the connecting block, of the bottoms of the telescopic positioning rods are further wrapped by springs, the two ends of the positioning block are slidably connected with the two telescopic positioning rods, one end of each spring is fixedly connected with the bottom of the connecting block, the other end of each spring is fixedly connected with the two ends of the back of the positioning block, and an extrusion table is further fixed to the center of the bottom of the positioning block through a bolt. And a rubber pad is tightly wrapped on the surface.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-high-speed centrifuges, in particular to an auxiliary device for calibrating the rotation speed of an ultra-high-speed centrifuge. Background Art

[0002] A centrifuge is a machine that uses centrifugal force to separate liquid from solid particles or components in a mixture of liquid and liquid. Centrifuges are mainly used to separate solid particles from liquid in a suspension, or to separate two immiscible liquids of different densities in an emulsion. When a suspension containing fine particles is left stationary, the suspended particles gradually sink due to the effect of the gravity field. The heavier the particles, the faster they sink, and conversely, particles with a density less than that of the liquid will float.

[0003] However, for current centrifugal equipment, especially those equipped with ultra-high-speed motors, the sensitivity of the turntable used to clamp and place test tubes is beyond the reach of ordinary turntables. During the process of exchanging liquid samples, how to ensure the stability of the turntable is still a problem that needs to be solved. Conventional hand-held turntables are not only prone to shaking, but also easy to accidentally touch other liquid samples, which is inconvenient. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes an auxiliary device for calibrating the rotation speed of an ultra-high-speed centrifuge.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an auxiliary device for ultra-high-speed centrifuge speed calibration, comprising: a bracket, a positioning piece vertically fixed on the top of the bracket and a slide rail with the height direction of the bracket as the track direction, the positioning piece comprises a servo cylinder, a connecting block, a telescopic positioning rod and a positioning block, the servo cylinder is connected and fixed to the top of the bracket, and its output end is integrated with the connecting block, the connecting block is L-shaped, and one side close to the bracket is slidably connected to the slide rail through a slider, and two sleeves are symmetrically fixed on the other side, the telescopic positioning rod includes two and is coaxially connected to the two sleeves one by one, the shaft section of the connecting block exposed at the bottom of the telescopic positioning rod is also coated with a spring, the two ends of the positioning block are slidably connected to the two telescopic positioning rods, one end of the spring is connected and fixed to the bottom of the connecting block, and the other end is connected and fixed to the two ends of the back of the positioning block, and the center of the bottom of the positioning block is also bolted with an extrusion platform, and the bottom surface of the extrusion platform is tightly wrapped with a central spherical downward convex rubber pad.

[0006] Furthermore, the bracket includes a base plate, vertical steel and horizontal steel. The four corners of the base plate are fixed to the external work surface with bolts. One end of the vertical steel is welded to the center of the base plate and welded to the base plate through reinforcing plates on both sides. The other end is welded to the horizontal steel at 90° and welded to the horizontal steel through an oblique square plate at the connection. The outer end of the horizontal steel is grooved and a cylinder fixing plate is fixed with bolts at the bottom.

[0007] Furthermore, the servo cylinder is fixed to the cylinder fixing plate with bolts at the four corners, the cylinder piston rod passes through the horizontal steel slot, the cylinder output end is bolted with a connecting sleeve, and the connecting block is also bolted with a T-shaped connecting shaft platform in the middle of the corresponding interval between the two shaft sleeves, a connecting shaft is transversely fixed on the connecting shaft platform, and the connecting sleeve is coaxially fixed to the connecting shaft as a whole.

[0008] Furthermore, a limiting rod is vertically fixed on the bottom surface of the connecting block.

[0009] Furthermore, the length of the slide rail is not less than the length of the shaft section of the exposed connecting block at the bottom of the telescopic positioning rod.

[0010] Furthermore, the length of the limiting rod is set not to exceed the length of the shaft section of the exposed connecting block at the bottom of the telescopic positioning rod.

[0011] Compared with the prior art, the beneficial effects of the utility model include: the servo cylinder can be controlled by external PLC programming, servo output, and its output end can drive the connecting table to slide up and down along the slide rail, that is, synchronously drive the extrusion table on the positioning block to descend, and the rubber pad on the extrusion block contacts and corresponds to the center of the corresponding turntable of the external centrifuge equipment through the center convex rubber pad, and the convex part can be squeezed into the reserved sunken notch in the center of the turntable. After further squeezing, the rubber pad compresses the spring coated on the corresponding shaft section of the telescopic positioning rod, and then the servo cylinder is positioned, and the rubber pad can fit tightly into the reserved notch on the turntable, realizing auxiliary positioning during the liquid sample replacement process of the turntable, which is practical and reliable, and avoids the limitations of inconvenience and shaking of manual hand support. . BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0013] Figure 1 Schematically shows an isometric structural diagram proposed according to one embodiment of the utility model;

[0014] Figure 2 Schematically shows a right view according to an embodiment of the utility model;

[0015] Figure 3 Schematically shows a method according to an embodiment of the present invention Figure 2 AA section view.

[0016] Numbers in the figure: 1. bracket; 2. positioning piece; 3. slide rail; 4. servo cylinder; 5. connecting block; 6. telescopic positioning rod; 7. positioning block; 8. slider; 9. bushing; 10. spring; 11. extrusion table; 12. rubber pad; 13. bottom plate; 14. vertical steel; 15. horizontal steel; 16. reinforcement plate; 17. oblique square plate; 18. cylinder fixing plate; 19. coupling sleeve; 20. connecting shaft table; 21. connecting shaft; 22. limit rod. DETAILED DESCRIPTION

[0017] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0018] According to one embodiment of the present invention, Figure 1-Figure 3 Shown.

[0019] like Figure 1 As shown, for the overall structure, in this embodiment, an auxiliary device for ultra-high-speed centrifuge speed calibration includes: a bracket 1, a positioning member 2 vertically fixed to the top of the bracket 1, and a slide rail 3 with the height direction of the bracket 1 as the track direction, the positioning member 2 includes a servo cylinder 4, a connecting block 5, a telescopic positioning rod 6 and a positioning block 7, the servo cylinder 4 is connected and fixed to the top of the bracket 1, and its output end is connected to the connecting block 5 as a whole, the connecting block 5 is L-shaped, and its side close to the bracket 1 is slidably connected to the slide rail 3 through a slider 8, and the other side is L-shaped. Two shaft sleeves 9 are symmetrically fixed on one side, the telescopic positioning rod 6 includes two and is coaxially connected to the two shaft sleeves 9 respectively, the shaft section of the exposed connecting block 5 at the bottom of the telescopic positioning rod 6 is also covered with a spring 10, the two ends of the positioning block 7 are slidably connected to the two telescopic positioning rods 6, one end of the spring 10 is connected and fixed to the bottom of the connecting block 5, and the other end is connected and fixed to the two ends of the back of the positioning block 7, an extrusion platform 11 is also bolted to the center of the bottom of the positioning block 7, and the bottom surface of the extrusion platform 11 is tightly wrapped with a central spherical downward convex rubber pad 12.

[0020] Through the above structure, the servo cylinder 4 can be controlled by external PLC programming and servo output. After the output, its output end can drive the connecting table to slide up and down along the slide rail 3, that is, synchronously drive the extrusion table 11 on the positioning block 7 to descend, and the rubber pad 12 on the extrusion block is in contact with the center of the corresponding turntable of the external centrifuge equipment through the center convex rubber pad 12, and the convex part can be squeezed into the reserved sunken groove in the center of the turntable. After further squeezing of the rubber pad 12, the positioning block 7 can slide in the opposite direction on the telescopic positioning rod 6 under the reaction force of the turntable, that is, compress the spring 10 coated on its corresponding shaft segment, and then the servo cylinder 4 is positioned. Under the action of the spring 10, the rubber pad 12 can fit tightly into the reserved groove on the turntable, that is, realize auxiliary positioning during the liquid sample replacement process of the turntable, which is practical and reliable, and avoids the limitations of inconvenience and shaking of manual hand support.

[0021] As for the structure of the bracket 1, in this embodiment, the bracket 1 includes a base plate 13, a vertical steel 14 and a horizontal steel 15. The four corners of the base plate 13 are bolted to the external work surface. One end of the vertical steel 14 is welded to the center of the base plate 13 and is welded to the base plate 13 on both sides through a reinforcing plate 16. The other end is welded to the horizontal steel 15 at 90° and is welded to the horizontal steel 15 at the connection through an oblique square plate 17. The outer end of the horizontal steel 15 is grooved and a cylinder fixing plate 18 is bolted to the bottom.

[0022] As for the specific connection structure of other structural parts during the calibration and clamping process, the servo cylinder 4 is fixed to the cylinder fixing plate 18 with four-corner bolts, the cylinder piston rod passes through the slot of the horizontal steel 15, the cylinder output end is bolted with a connecting sleeve 19, and the connecting block 5 is also bolted with a T-shaped connecting shaft block 20 in the middle of the interval between the two shaft sleeves 9, and a connecting shaft 21 is transversely fixed on the connecting shaft block 20, and the connecting sleeve 19 is coaxially fixed with the connecting shaft 21 as a whole.

[0023] The right-angle bracket 1 structure is simple and reliable, and the positioning and calibration method from top to bottom reserves sufficient space for the centrifugal device. The connection of the overall bracket 1 structure is stable and reliable, and the operation process will not easily shake to affect the calibration positioning accuracy.

[0024] Furthermore, a limiting rod 22 is vertically fixed to the bottom surface of the connecting block 5. The length of the slide rail 3 is not less than the length of the shaft section of the connecting block 5 exposed at the bottom of the telescopic positioning rod 6. The length of the limiting rod 22 is not more than the length of the shaft section of the connecting block 5 exposed at the bottom of the telescopic positioning rod 6. The design of the limiting rod 22 and the coordination of the lengths of the slide rail 3, the telescopic positioning rod 6, and the positioning rod are all to meet the requirements of the rubber pad 12 for extruding and positioning the external turntable. The overall structural layout is reasonable, simple and practical.

[0025] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An auxiliary device for ultra-high speed centrifuge speed calibration, characterized in that: include: A bracket, a positioning piece vertically fixed on the top of the bracket and a slide rail with the height direction of the bracket as the track direction, the positioning piece includes a servo cylinder, a connecting block, a telescopic positioning rod and a positioning block, the servo cylinder is connected and fixed to the top of the bracket, and its output end is integrated with the connecting block, the connecting block is L-shaped, and its side close to the bracket is slidably connected to the slide rail through a slider, and two shaft sleeves are symmetrically fixed on the other side, the telescopic positioning rod includes two and is coaxially connected to the two shaft sleeves one by one, and the shaft section of the connecting block exposed at the bottom of the telescopic positioning rod is also covered with a spring, and the two ends of the positioning block are slidably connected to the two telescopic positioning rods, one end of the spring is connected and fixed to the bottom of the connecting block, and the other end is connected and fixed to the two ends of the back of the positioning block, and an extrusion platform is also bolted to the center of the bottom of the positioning block, and the bottom surface of the extrusion platform is tightly wrapped with a central spherical convex rubber pad.

2. The auxiliary device for ultra-high speed centrifuge speed calibration according to claim 1, characterized in that: The bracket includes a base plate, vertical steel and horizontal steel. The four corners of the base plate are fixed with bolts to the external work surface. One end of the vertical steel is welded to the center of the base plate and welded to the base plate through reinforcing plates on both sides. The other end is welded to the horizontal steel at 90° and welded to the horizontal steel through an oblique square plate at the connection. The outer end of the horizontal steel is grooved and a cylinder fixing plate is fixed with bolts at the bottom.

3. The auxiliary device for ultra-high speed centrifuge speed calibration according to claim 2, characterized in that: The servo cylinder is fixed to the cylinder fixing plate with bolts at the four corners, the cylinder piston rod passes through the horizontal steel slot, the cylinder output end is bolted with a connecting sleeve, the connecting block is also bolted with a T-shaped connecting shaft platform in the middle of the corresponding interval between the two shaft sleeves, a connecting shaft is transversely fixed on the connecting shaft platform, and the connecting sleeve is coaxially fixed to the connecting shaft as a whole.

4. The auxiliary device for ultra-high speed centrifuge speed calibration according to claim 1, characterized in that: A limiting rod is also vertically fixed on the bottom surface of the connecting block.

5. The auxiliary device for ultra-high speed centrifuge speed calibration according to claim 1, characterized in that: The length of the slide rail is set to be no less than the length of the shaft section of the exposed connecting block at the bottom of the telescopic positioning rod.

6. The auxiliary device for ultra-high speed centrifuge speed calibration according to claim 4, characterized in that: The length of the limiting rod is set not to exceed the length of the shaft section of the exposed connecting block at the bottom of the telescopic positioning rod.

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