Centrifugal machine capable of efficiently sucking gas

Abstract

The invention relates to the technical field of medical equipment, in particular to a centrifugal machine capable of efficiently sucking gas, which comprises a base plate, a side plate, a partition plate, a base, a stand column, a vacuum suction machine, a rotating wheel, a door cover, a gas box and other components, and can be used for vacuumizing and sucking gas in different parts in the box body in multiple directions, so that the discharge of the gas in the centrifugal machine is accelerated; therefore, gas in the centrifugal machine can be completely sucked as much as possible; meanwhile, a motor is used for driving a gear to rotate so that a rotating wheel can rotate, an arc-shaped rod can drive an air box to reciprocate, the air box slides between the partition plates, piston motion is formed, airflow in the centrifugal machine can enter the air box quickly, and the suction speed is further increased.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a centrifuge that can efficiently extract gas. Background Technology

[0002] A centrifuge is a machine that uses centrifugal force to separate the components of a mixture of liquids and solid particles or liquids and liquids. High-speed refrigerated centrifuges can reach speeds of over 10,000 rpm. Centrifuges are mainly used to separate solid particles from liquids in suspensions, or to separate two immiscible liquids with different densities in emulsions. They can also be used to remove liquids from wet solids, such as in a washing machine to spin-dry wet clothes. Special high-speed tubular centrifuges can also separate gas mixtures of different densities.

[0003] For high-speed and even ultra-high-speed centrifuges, evacuating the centrifuge chamber has become a key technology in order to reduce the frictional heat generated between the rotor and the air and to maintain a low-temperature environment; the current mainstream solution is to set an air extraction port on the chamber wall and connect it to a vacuum pump.

[0004] However, this single exhaust port design may have problems such as insufficient efficiency, long airflow paths, and the formation of local dead zones when extracting gas from certain areas of the chamber (such as corners and around rotor components). This affects the speed at which the target vacuum level is reached and the uniformity of the vacuum environment to some extent.

[0005] Therefore, for specific centrifugation operation requirements, it is necessary to evacuate the centrifuge. If the evacuation efficiency is low, it will prolong the preparation time, affect the centrifugation efficiency, and the residual gas may still have an adverse effect on the temperature environment and the sample. Summary of the Invention Therefore, this invention provides a solution. The invention uses a vacuum chamber, air arm, and suction claw evenly arranged inside the device. The vacuum chamber, air arm, and suction claw are hollow and have small holes, allowing the vacuum pump to evacuate gas from different parts of the chamber, providing multi-directional suction and accelerating the removal of gas from the centrifuge, thus solving the above problems. This invention achieves the above objectives through the following technical solution:

[0006] A centrifuge capable of efficiently drawing gas includes: a base plate, side plates, partitions, a base, a column, a vacuum pump, a rotor, a door cover, and a gas box;

[0007] The base plate and the side plate constitute the centrifuge housing structure; the door cover is rotatably located at the upper end of the centrifuge housing structure; the upper end face of the base plate has partitions, the number of which is four, and the four partitions are respectively located at the four corners inside the centrifuge housing structure, and the flat side wall of the partition is fixed to the inner wall of the side plate; the space enclosed between the partition and the side plate is a compartment; the central area between the four partitions forms a cylindrical space;

[0008] One of the partitions is fixed with a reciprocating motor, and a gear is connected to the lower end of the reciprocating motor; the number of bases is the same as the number of partitions, and the bases are set between the two partitions; the base has a baffle on the side near the center of the base; the base has an L-shaped air passage, one end of which passes vertically downward through the interior of the base and laterally through the interior of the substrate to the circular channel at the center of the substrate; the two ends of the L-shaped air passage are respectively located on the top surface of the base and one side of the circular channel; the center of the top surface of the substrate has a circular channel, and the column is set in the circular channel through a connecting column. The connecting column is a hollow cylindrical structure with an open bottom, and four connecting ports are evenly spaced on the outer peripheral wall of the connecting column. The connecting ports correspond to the positions of the ports at one end of each group of L-shaped air passages; the substrate below the connecting column has an air outlet; a one-way sealing valve is installed at the center of the bottom of the substrate, and the one-way sealing valve is connected to the air outlet. The bottom of the one-way sealing valve has a vacuum suction machine.

[0009] The rotating wheel is mounted on a vertical shaft on the upper end face of the column. The upper end of the rotating wheel has four connecting columns. The outer circumference of the rotating wheel has teeth that mesh with gears. The lower end face of the rotating wheel is provided with four arc-shaped baffles at equal intervals. The gap between each pair of arc-shaped baffles is a vent. The arc-shaped baffles are located around the connecting columns.

[0010] The air box is slidably disposed between two partitions. The hollow area inside the air box is the internal air passage. Multiple back air holes are provided on the side wall of the air box away from the center of the substrate. A bottom air port is opened at the bottom of the air box. A support plate is provided on the side wall of the air box near the center of the substrate. The support plate is located below the side wall of the air box, and one end of the support plate extends through the notch on the baffle to the top of the rotating wheel. A connecting column is provided on the bottom surface of the support plate. Multiple air arms are provided above the support plate. The multiple air arms are equally spaced on the side wall of the air box. The end of the air arm has a suction claw. The air arm and suction claw are connected to the inside of the air box. Multiple small air holes are opened on the side wall of the air arm and suction claw.

[0011] The number of arc-shaped connecting rods is four, and the arc-shaped connecting rods are respectively rotatably mounted on the connecting column one of the rotating wheel and the connecting column two of the air box on the corresponding side;

[0012] The air arm is detachable; the diameter of the small air vents is smaller than that of the back air vents; an airflow guiding device is installed inside the air box, which can be a guide fan or a guide vane.

[0013] The centrifuge housing includes sound-absorbing cotton and activated carbon in its internal cavity, which is further equipped with the air box, air arm, and suction claw. The reciprocating motor rotates alternately in both forward and reverse directions. Sensors and controllers are installed inside the centrifuge housing.

[0014] Beneficial effects of this invention:

[0015] 1. In this invention, the gas box, gas arm, and suction claw are evenly arranged inside the device. The gas box, gas arm, and suction claw are hollow and have small holes, allowing the vacuum pump to evacuate the gas in different parts of the box, suctioning from multiple directions, accelerating the discharge of gas inside the centrifuge, and thus ensuring that the gas inside the centrifuge is sucked up as completely as possible. At the same time, the motor drives the gear to rotate, which in turn rotates the rotor, causing the arc-shaped connecting rod to drive the gas box to reciprocate. The movement of the gas box slides between the partitions, forming a piston motion, which accelerates the airflow into the gas box from inside the centrifuge, thereby further accelerating the suction rate. By quickly establishing and maintaining a high vacuum, the heat generated by the friction between the rotor and the gas is effectively reduced, maintaining the stable low-temperature environment required inside the centrifuge, and preventing the occurrence of water vapor condensation.

[0016] 2. The vacuum suction machine of the present invention is located at the bottom of the chamber, so that when vacuuming, the suction force makes the door cover fit more tightly with the upper part of the side plate of the centrifuge chamber, resulting in a better sealing effect.

[0017] 3. The air box, air arm, and suction claw of the present invention are equipped with sound-absorbing cotton, activated carbon, etc. This arrangement filters the gas inside the centrifuge shell, making the discharged gas environmentally friendly and pollution-free, and reducing the noise impact during operation.

[0018] 4. The partitions of the present invention are arranged such that the compartments formed between the partitions and the side plates are used to place other system components or materials of the centrifuge, and the central area between the four partitions forms a cylindrical space for setting up the rotor platform; thus, the area inside the centrifuge housing is better utilized. At the same time, the enclosure structure of the partitions further reduces the noise impact caused by the operation of the internal devices. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device provided by the present invention.

[0020] Figure 2 This is an exploded schematic diagram of the components of the device provided by the present invention.

[0021] Figure 3 Cross-sectional views of the components of the device provided by the present invention.

[0022] Figure 4 This is a schematic diagram of the substrate, side plate, and partition structure provided by the present invention.

[0023] Figure 5 This is an internal sectional view of the centrifuge housing structure provided by the present invention.

[0024] Figure 6 This is a top view of the overall device provided by the present invention.

[0025] Figure 7This is a schematic diagram of the substrate structure provided by the present invention.

[0026] Figure 8 This is a schematic diagram of the door cover structure provided by the present invention.

[0027] Figure 9 This is a schematic diagram of the air box structure provided by the present invention.

[0028] Figure 10 This is a schematic cross-sectional view of the gas box provided by the present invention.

[0029] Figure 11 This is a schematic diagram of the rotary wheel structure provided by the present invention.

[0030] Figure 12 A schematic diagram of the arc-shaped connecting rod structure provided by the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Base plate; 11. Bottom column; 12. Side plate; 121. Side protrusion plate; 122. Rotating shaft; 13. Partition plate; 131. Chamber; 132. Extending plate; 133. Motor; 134. Gear; 14. Base; 141. Baffle; 142. L-shaped air passage; 15. Column; 151. Vertical shaft; 152. Connecting column; 153. Air passage connection port; 154. Air outlet; 155. Circular channel; 16. One-way sealing valve; 17. Vacuum suction machine; 18. Rotary wheel ; 181. Rotary hole; 182. Connecting post one; 183. Tooth; 184. Arc-shaped baffle; 185. Vent; 20. Door cover; 21. Hemispherical part; 22. Rotating hole; 23. Sealing strip; 24. Side sealing strip; 30. Air box; 301. Back side air hole; 302. Internal air passage one; 303. Bottom air port; 31. Support plate; 32. Connecting post two; 33. Air arm; 34. Suction claw; 35. Small air hole; 39. Arc-shaped connecting rod; 391. Connecting hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0034] like Figure 1-2 As shown, a centrifuge capable of efficiently drawing gas includes: a base plate 10, a side plate 12, a partition plate 13, a base 14, a column 15, a vacuum pump 17, a rotor 18, a door cover 20, and a gas box 30.

[0035] like Figure 4 , Figure 8 As shown, a bottom post 11 is mounted on the lower end face of the substrate 10, and four side plates 12 are provided around the upper end face of the substrate 10. The substrate 10 and the side plates 12 constitute the centrifuge housing structure. The top ends of the opposite side plates 12 are respectively provided with two protruding plates 121. The door cover 20 is rotatably connected to the rotating shaft 122 on the side protruding plates 121 through the rotating hole 22 of the hemispherical part 21. A sealing strip 23 and a sealing strip 24 are provided on the bottom surface of the door cover 20.

[0036] like Figure 5 As shown, the upper surface of the substrate 10 has a partition 13, which is composed of two flat plates and an arc-shaped plate. The arc-shaped plate is connected between the two flat plates. There are four partitions 13, which are respectively set at the four corners of the centrifuge housing structure composed of the substrate 10 and the side plates 12. The side walls of the flat plates of the partitions 13 are attached and fixed to the inner walls of the side plates 12. The space enclosed between the partitions 13 and the side plates 12 is a compartment 131, which can be used to place other system components or materials of the centrifuge. The central area between the four partitions 13 forms a cylindrical space, which is used to set up the rotor platform. The centrifugation operation is carried out on the rotor platform.

[0037] like Figure 5 As shown, a reciprocating motor 133 is fixedly mounted on the protruding plate 132 at the lower middle end of one of the partitions 13, and a gear 134 is connected to the lower end of the reciprocating motor 133; the number of bases 14 is the same as the number of partitions 13, and the bases 14 are located between the two partitions 13 and are positioned near the side plate 12; a baffle 141 is provided on the side of the base 14 near the center of the base 10; a positioning groove is provided on the top surface of the base 14, and a matching boss is provided on the bottom of the air box 30 to ensure that the bottom air port 303 is precisely connected to the port of the L-shaped air passage 142 when the air box moves back and forth, thereby reducing airflow leakage; the number of L-shaped air passages 142 is the same as the number of bases 14, and one end of the L-shaped air passage 142 passes vertically downward through the interior of the base 14 and extends laterally through the interior of the substrate 10 to the circular channel 155 at the center of the substrate 10; the two ports of the L-shaped air passage 142 are respectively located on the top surface of the base 14 and one side of the circular channel 155;

[0038] A circular channel 155 is located at the center of the top surface of the substrate 10. A column 15 is installed inside the circular channel 155 via a connecting column 152. The connecting column 152 is a hollow cylindrical structure with an open bottom. Four connecting ports 153 are evenly spaced on the outer peripheral wall of the connecting column 152. The connecting ports 153 correspond to the port positions at one end of each group of L-shaped air channels 142. The upper end face of the column 15 has a vertical shaft 151. An air outlet 154 is opened on the substrate 10 below the connecting column 152.

[0039] like Figure 1 , Figure 3As shown, the one-way sealing valve 16 is installed at the center of the bottom end of the base plate 10. The one-way sealing valve 16 is connected to the air outlet 154. The bottom end of the one-way sealing valve 16 has a vacuum pump 17. The one-way sealing valve 16 allows the airflow to flow only in one direction from the centrifuge chamber to the outside.

[0040] like Figure 3 , Figure 11 As shown, the rotating wheel 18 is rotatably mounted on the vertical shaft 151 via its central rotating hole 181 and bearing. The upper end of the rotating wheel 18 has four connecting posts 182, and the outer circumference of the rotating wheel 18 has teeth 183. The teeth 183 on the rotating wheel 18 mesh with the gear 134. The lower end face of the rotating wheel 18 is provided with four arc-shaped baffles 184 at equal intervals. The gap between each pair of arc-shaped baffles 184 is a vent 185, and the arc-shaped baffles 184 are located around the connecting posts 152. The arc-shaped baffles 184 can rotate in the circular channel 155. By rotating the rotating wheel 18, the vent 185 can be controlled to correspond with the air passage connection port 153, so that the airflow enters the air outlet 154 through the vent 185 and the air passage connection port 153.

[0041] like Figure 6 , Figure 9 , Figure 10 As shown, the air box 30 is slidably disposed between the two partitions 13, and the bottom surface of the air box 30 is in sliding contact with the top surface of the base 14. The air box 30 has an internal hollow cavity structure, and the hollow area inside the air box 30 is an internal air passage 302. Multiple back-side air holes 301 are provided on the side wall of the air box 30 away from the center of the substrate 10, and a bottom air port 303 is opened at the bottom of the air box 30. A support plate 31 is provided on the side wall of the air box 30 near the center of the substrate 10. The support plate 31 is located below the side wall of the air box 30, and... One end of the support plate 31 extends through the notch on the baffle 141 to the top of the rotating wheel 18; the bottom surface of the end of the support plate 31 near the rotating wheel 18 has a connecting column 32; multiple air arms 33 are arranged above the support plate 31, and the multiple air arms 33 are equally spaced on the side wall of the air box 30. The end of the air arm 33 has a suction claw 34. The air arm 33 and the suction claw 34 are hollow inside, and the air arm 33 and the suction claw 34 are connected to the inside of the air box 30. Multiple small air holes 35 are opened on the side wall of the air arm 33 and the suction claw 34.

[0042] Among them, the air arm 33 is detachable, and the air arm 33 of the appropriate length can be replaced according to the shape of the rotor platform inside the centrifuge to adapt to the device;

[0043] Among them, the aperture of the small air hole 35 is smaller than that of the back air hole 301. When the airflow enters the air box 30 quickly from the back air hole 301, the pressure inside the air box 30 is small. According to the Bernoulli effect, the airflow outside the air box 30 enters the air box 30 from the small air hole 35 on the side wall, making the airflow outside the air box 30 enter the air box 30 faster.

[0044] Furthermore, an airflow guiding device (not shown) is provided inside the air box 30. The airflow guiding device may be a guide fan or a guide vane. This setting guides the airflow entering the air box 30 downward to facilitate subsequent vacuuming.

[0045] like Figure 3 , Figure 12 As shown, there are four arc-shaped connecting rods 39. The arc-shaped connecting rods 39 are rotatably mounted on the connecting post 182 of the rotating wheel 18 and the connecting post 32 of the air box 30 on the corresponding side through the connecting holes 391 at both ends. When the rotating wheel 18 rotates, the arc-shaped connecting rods 39 can drive the air box 30 to slide horizontally, thereby controlling the bottom air port 303 of the air box 30 to correspond with the port of the L-shaped air passage 142 on the base 14, thereby controlling the flow of air.

[0046] Among them, sound-absorbing cotton and activated carbon are installed in the inner cavity of the air box 30, air arm 33 and air suction claw 34. This setting filters the gas in the centrifuge shell, making the discharged gas environmentally friendly and pollution-free, and reducing the noise impact during operation.

[0047] The reciprocating motor 133 rotates alternately in the forward and reverse directions to drive the air box 30 to move back and forth on the top surface of the base 14.

[0048] The centrifuge housing is equipped with pressure and humidity sensors and a controller. The sensors monitor the internal pressure and humidity of the housing and feed the monitored signals back to the controller. The controller controls the start and stop of each power unit. The controller is electrically connected to the pressure sensor, humidity sensor, motor 133, and vacuum pump 17. The controller is configured as follows: when the pressure sensor detects that the internal pressure is higher than a set threshold, it starts motor 133 and vacuum pump 17 to evacuate the air; when the pressure reaches the required vacuum level, it controls motor 133 to stop and aligns the air port 303 at the bottom of the air chamber 30 with the L-shaped air passage 142, and continues to evacuate the air until the set time or pressure is reached, after which it shuts off vacuum pump 17.

[0049] The basic principle of this invention:

[0050] Before the equipment is started, the operator places the centrifuge tubes on the rotor platform at the center of the device and then closes the door cover 20. Next, the reciprocating motor 133 is started simultaneously with the vacuum pump 17. The reciprocating motor 133 drives the gear 134 to rotate, which in turn drives the rotor 18 to rotate around the vertical shaft 151. This causes the connecting column 182 to deflect the arc-shaped connecting rod 39, thereby moving the gas box 30. The reciprocating motor 133 rotates alternately in both forward and reverse directions to move the gas box 30 on the base 1. 4. The top surface reciprocates; wherein, the air box 30 moves closely against the side walls of the partition 13 on both sides, and the air box 30 moves approximately like a piston, forcing the airflow between the side walls of the partition 13 into the air box 30. The airflow quickly enters the air box 30 from the back air hole 301. At this time, the pressure inside the air box 30 is low. According to the Bernoulli effect, the airflow outside the air box 30 enters from the small air hole 35; wherein, the vacuum suction machine 17 is in working state, and during the reciprocating movement of the air box 30 driven by the reciprocating motor 133, the air port 303 at the bottom of the air box 30 and the L-shaped... With the air duct 142 port aligned, the vacuum pump 17 initially draws air from the air chamber 30. After the air chamber 30 reciprocates once (multiple reciprocations may be performed depending on the centrifuge's configuration), the bottom air port 303 of the air chamber 30 aligns with the port of the L-shaped air duct 142. At this point, the air inlet 185 and outlet 154 of the rotor 18 are aligned with the other port of the L-shaped air duct 142, and the reciprocating motor 133 stops. Then, the vacuum pump 17 completely draws out the air from the air chamber 30, allowing the centrifuge to complete its rotation. The interior of the casing is under vacuum. Airflow from the air box 30 enters the L-shaped air passage 142 through the bottom air port 303, and then exits through the air inlet 185, the air outlet 154, and the one-way sealing valve 16. Next, the reciprocating motor 133 is started, which makes the bottom air port 303 of the air box 30 and the port of the L-shaped air passage 142 staggered. The air inlet 185, the air outlet 154 of the rotor 18 and the other port of the L-shaped air passage 142 are also staggered. The vacuum pump 17 is turned off. Finally, the rotor platform is started to perform centrifugal operation.

Claims

1. A centrifuge capable of efficiently drawing in gas, comprising: Substrate (10), side plate (12), partition (13), base (14), column (15), vacuum suction machine (17), rotating wheel (18), air box (30); The features are as follows: the base plate (10) and the side plate (12) constitute the centrifuge box structure; a door cover (20) is rotatably installed on the box; and sensors and controllers are installed inside the box. The substrate (10) has partitions (13) at its four corners, and the sidewalls of the partitions (13) are fixed to the inner walls of the sidewalls (12); a reciprocating motor (133) is fixed on one of the partitions (13), and a gear (134) is connected to the lower end of the reciprocating motor (133); a base (14) is provided between the two partitions (13); an L-shaped air passage (142) is provided inside the base (14), and the two ends of the L-shaped air passage (142) are respectively located on the top surface of the base (14) and one side of the circular channel (155) in the center of the substrate (10); the column (15) is connected to the column (15) by means of the connecting column (15) 2) The connecting column (152) is a hollow cylindrical structure with an open bottom, located in the circular channel (155). Four connecting ports (153) are equally spaced on the outer peripheral wall of the connecting column (152). The connecting ports (153) correspond to the port positions at one end of the L-shaped air passage (142). An air outlet (154) is opened on the base plate (10) below the connecting column (152). A one-way sealing valve (16) is installed at the center of the bottom end of the base plate (10). The one-way sealing valve (16) is connected to the air outlet (154). A vacuum suction machine (17) is located at the bottom end of the one-way sealing valve (16). The rotating wheel (18) is rotatably mounted on the vertical shaft (151) on the upper end face of the column (15). The teeth (183) on the outer ring of the rotating wheel (18) mesh with the gear (134). Four arc-shaped baffles (184) are evenly spaced on the lower end face of the rotating wheel (18). The arc-shaped baffles (184) are located around the connecting column (152). The air box (30) is slidably disposed between two partitions (13). The air box (30) is driven by a rotating wheel (18). The air box (30) is provided with a back air hole (301), a bottom air port (303), and an air arm (33). The end of the air arm (33) has an air claw (34). The air arm (33) and the air claw (34) are connected to the inside of the air box (30). Multiple small air holes (35) are opened on the side walls of the air arm (33) and the air claw (34).

2. The centrifuge for efficiently drawing gas according to claim 1, characterized in that: One end of the L-shaped airway (142) passes downward through the base (14) and extends laterally through the substrate (10) to the circular channel (155).

3. A centrifuge for efficiently drawing gas according to claim 2, characterized in that: The partition (13) is composed of two flat plates and an arc-shaped plate. The arc-shaped plate is connected between the two flat plates. The space enclosed between the partition (13) and the side plate (12) is a compartment (131). The central area between the partitions (13) forms a cylindrical space.

4. A centrifuge for efficiently drawing gas according to claim 3, characterized in that: The rotating wheel (18) is rotatably mounted on the vertical shaft (151) through the rotating hole (181) in its center and the bearing. The upper end of the rotating wheel (18) has four connecting posts (182).

5. A centrifuge for efficiently drawing gas according to claim 4, characterized in that: The bottom surface of the air box (30) slides in contact with the top surface of the base (14). The hollow area inside the air box (30) is an internal air passage (302). Multiple back air holes (301) are provided on the side wall of the air box (30) away from the center of the substrate (10). A bottom air port (303) is opened at the bottom of the air box (30). The diameter of the small air hole (35) is smaller than that of the back air hole (301).

6. A centrifuge for efficiently drawing gas according to claim 5, characterized in that: The air box (30) has a support plate (31) below the side wall. One end of the support plate (31) extends through the notch on the baffle (141) of the base (14) to the top of the rotating wheel (18). The bottom surface of the support plate (31) near the rotating wheel (18) has a connecting column (32).

7. A centrifuge for efficiently drawing gas according to claim 6, characterized in that: There are multiple air arms (33) located above the support plate (31), and the air arms (33) are detachable; the inner cavities of the air box (30), air arms (33), and air claws (34) are equipped with sound-absorbing cotton and activated carbon.

8. A centrifuge for efficiently drawing gas according to claim 7, characterized in that: An airflow guiding device is provided inside the air box (30), which may be a guide fan or a guide blade.

9. A centrifuge for efficiently drawing gas according to claim 8, characterized in that: An arc-shaped rod (39) is provided on the connecting post one (182) of the rotating wheel (18) and the connecting post two (32) of the air box (30) on the corresponding side. The arc-shaped rod (39) is rotatably mounted on the connecting post one (182) and the connecting post two (32) respectively through the connecting holes (391) at both ends.

10. A centrifuge for efficiently drawing gas according to claim 9, characterized in that: The reciprocating motor (133) rotates alternately in the forward and reverse directions.

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