CN106964499B - Supercentrifuge with counterweight and collecting function - Google Patents

Abstract

A high-speed centrifuge with counterweight and collection functions, including a body, a rotor and a cover plate hinged on the top of the body. There is a centrifugal cavity inside the body. The center of the centrifugal cavity is equipped with a rotating shaft connected to the rotating motor. The rotor is set on the On the rotating shaft, the rotor has several symmetrical centrifugal holes evenly distributed along the circumference, and also includes a counterweight device, an anti-splash device and a collection device. The counterweight device includes a slideway on the outer surface of the rotor at one of the centrifugal holes and a The counterweight is slidably connected to the slideway. The anti-splash device includes a cap set on the rotor and two symmetrical fixed ears fixedly connected to the outer surface of the rotor. The collecting device includes a collecting plate and a collecting plate fixedly connected to the bottom surface of the cover. cup. The invention can conveniently balance the rotor to ensure the balance, and the operation is convenient, and the leaked gas can also be condensed into liquid, and then collected, which can prevent the leaked gas from polluting the inner environment of the cover plate and the centrifugal chamber, and the collecting plate is detachable replace.

Description

High-speed centrifuge with counterweight and collection

technical field

The invention relates to the field of centrifugal devices, in particular to a high-speed centrifuge with counterweight and collection functions.

Background technique

The high-speed centrifuge is mainly used to separate the solid particles in the suspension from the liquid, or to separate two different densities and immiscible liquids in the emulsion. The main principle of the centrifuge is to use the strong centrifugal force generated by the high-speed rotation of the rotor to accelerate the sedimentation speed of the particles in the liquid and separate the substances with different sedimentation coefficients and buoyant densities in the sample.

When using a high-speed centrifuge, it is necessary to symmetrically place the centrifuge tubes containing the samples to keep the rotor in balance before starting the high-speed centrifuge to work. If the rotor is not kept in balance and rotated at high speed, it will cause great damage to the high-speed centrifuge damage. When performing high-speed centrifugation for an even number of samples, you only need to place the centrifuge tubes containing the samples symmetrically. If you need to perform high-speed centrifugation for an odd number of samples, you need to prepare another tube with the same quality as the extra sample. The solution is placed in a centrifuge tube symmetrically to ensure the balance of the rotor, which is inconvenient to operate and low in efficiency; The sample containing ether is placed in a high-speed centrifuge at room temperature. When rotating at high speed, the temperature of ether in the centrifuge tube increases and the pressure increases, which prompts the cover of the centrifuge tube to burst, and the sample in the centrifuge tube will splash into the high-speed centrifuge. On the cover of the centrifuge, it will pollute the cover and the internal environment of the high-speed centrifuge, and it is inconvenient to clean.

Therefore, we have designed a high-speed centrifuge that not only has the function of counterweight but also has the functions of anti-splash and collection. When using this high-speed centrifuge to perform high-speed centrifugation on an odd number of samples, it is convenient to perform centrifugation on the extra samples. The counterweight keeps the rotor in balance; it can also condense the leaked gas into a liquid and then collect it, which can effectively prevent the leaked gas from polluting the inner environment of the cover plate and the centrifugal chamber, and the collecting plate can be disassembled and replaced according to the actual situation, which is convenient and practical .

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a high-speed centrifuge with counterweight and collection functions, which can conveniently counterweight the rotor to ensure balance, convenient operation, and can improve experimental efficiency. The leaked gas is condensed into liquid and then collected, which can effectively prevent the leaked gas from polluting the inner environment of the cover plate and the centrifugal chamber, and the collecting plate can be disassembled and replaced according to the actual situation, which is convenient and practical.

In order to solve the above technical problems, the present invention adopts the following technical scheme: a high-speed centrifuge with counterweight and collection functions, including a body, a rotor and a cover plate hinged on the top of the body, the inside of the body is provided with a centrifugal cavity, and the centrifuge The body at the opening of the upper end of the cavity is provided with a sealing ring, the inside of the body is provided with a rotating motor, the inner center of the centrifugal chamber is provided with a rotating shaft connected to the rotating motor, and the rotor is sleeved on the rotating shaft. The rotor is in the shape of a truncated cone with a small top and a large bottom. The rotor is evenly distributed along the circumferential direction with several symmetrical centrifugal holes for placing centrifuge tubes. The upper ends of each centrifugal hole are opened on the upper surface of the rotor. The center lines of the holes are all parallel to the generatrix of the rotor, and the present invention also includes a counterweight device, an anti-splash device and a collection device,

The counterweight device includes a slideway on the outer surface of the rotor at one of the centrifugal holes and a counterweight slidably connected to the slideway. The slideway is arranged along the generatrix of the rotor, and the center of the bottom of the counterweight A groove is provided, a ball is provided at the opening of the groove, a compression spring is provided between the ball and the bottom of the groove, a counterweight handle is provided on the top of the counterweight, and the inside of the slideway is along the direction of the generatrix of the rotor. There are several slots matching the balls, and a slide cover fixedly connected with the slide is provided on the outside of the slide. The counterweight handle of the weight protrudes from the bar hole;

The anti-splash device includes a cap set on the rotor and two symmetrical fixed ears fixedly connected to the outer surface of the rotor at the same level and located between the top of the slideway and the upper surface of the rotor. The cap is matched with the rotor The open end of the inner wall of the cap is symmetrically provided with two vertical grooves matching the width of the fixed ear, and the vertical grooves are connected upwardly with a circular groove inside the cap, and the vertical grooves are connected with the circular grooves. The longitudinal section is T-shaped, the height of the circular groove is greater than the thickness of the fixed ear, and the top of the cap is fixedly connected radially with two mutually symmetrical cap handles for taking;

The collection device includes a collection plate detachably and fixedly connected to the middle part of the bottom surface of the cover plate and a collection cup for collection. A built-in semiconductor refrigeration chip connected to the power supply, the top center of the cap is provided with a collection cup placement groove for placing the collection cup, the shape of the collection cup placement groove matches the shape of the collection cup, the collection cup There is a collection cup handle on the edge of the cup for easy handling.

The front shell of the body is provided with a control panel for controlling the rotation speed of the rotating motor, and the inside of the body is provided with an electric control device connected to the rotating motor, and the control panel and the electric control device are connected through lines.

A level is provided at the center of the top of the rotor.

There are six symmetrical centrifugal holes evenly distributed around the rotor.

The shape of the counterweight is a regular square prism or an inverted regular square truss.

The level provided on the rotor is a circular level.

The detachable fixed connection form of the cover plate and the collecting plate is a bolt connection.

Adopt above-mentioned technical scheme, the present invention has the following advantages:

The sealing ring provided on the machine body can enhance the airtightness of the present invention, and the experimental samples will not pollute the external environment of the high-speed centrifuge due to splashing and other reasons, and can avoid some toxic samples (such as liquid ammonia, ether, etc.) from polluting the outside world , improving the safety of the high-speed centrifuge.

The counterweight function can be realized by setting the slideway and the counterweight block. Put the extra sample into the centrifugal hole symmetrical to the slideway, move the counterweight set in the slideway, observe the spirit level, and when the level is displayed, Indicates that the rotor is balanced, that is, the balance weight can be stopped, and the level gauge provided at the center of the top of the rotor can be used to check whether the rotor after the counterweight is level. The rotor of the present invention is provided with six centrifugal holes to meet general use requirements. When the counterweight is installed, the regular quadrangular prism-shaped or inverted regular quadrangular truss-shaped counterweight is convenient to enter the slideway, which is convenient for picking and placing when replacing the counterweight. The shape of the counterweight is matched with the shape of the inner wall of the slideway, and this design makes the counterweight engage with the inner wall of the slideway, which is not easy to shake.

The anti-splash function can be realized by setting the cap. When using the present invention to perform high-speed centrifugation on samples containing low-boiling point solvents, if the low-boiling point solvent in the centrifuge tube increases in temperature and pressure, the cap of the centrifuge tube will collapse. Open, the sample in the centrifuge tube will be blocked by the cap, and will not splash onto the cover or into the centrifuge chamber, reducing the pollution caused by the sample to the high-speed centrifuge, and when cleaning pollutants, only need to clean the cap Yes, it is not necessary to clean the cover plate and the centrifuge chamber at the same time, thereby reducing the workload of cleaning.

The collection function can be realized by the collection device. The detachable collection plate set by the present invention can replace the collection plate according to different experimental solvents. If ether solvent is used, a glass material collection plate needs to be used. If a strong acid solvent is used, it needs to be used. Remove the collection plate made of glass and replace it with a collection plate made of polytetrafluoroethylene, which is convenient and practical, and the collection plate is in the shape of an inverted cone, which can cooperate with the collection cup to collect; the built-in semiconductor refrigeration sheet of the collection plate can be used Gas leaking onto the collecting plate condenses, and the condensed liquid slides down the inverted conical collecting plate into a collecting cup placed below.

In summary, when separating an even number of samples, you only need to place the centrifuge tubes containing the samples symmetrically. If you need to separate an odd number of samples, first place the paired samples in symmetrical centrifuge holes, and finally , put the last sample into the centrifuge hole that is symmetrical to the slideway, and then use the handle to move the counterweight to move up and down along the slide until the level shows the level. There is no need to prepare another sample with the same quality as the extra sample. solution, thus, the present invention can conveniently counterweight the rotor to ensure balance, the operation is convenient, and the experimental efficiency can be improved; at the same time, the collection device provided by the present invention is convenient for collecting the condensed liquid, and it can be taken out and collected after the experiment is finished. The waste liquid in the cup is treated centrally without polluting the environment in the centrifuge cavity. The present invention condenses the leaked gas into liquid and then collects it, which can effectively prevent the leaked gas from polluting the cover plate and the internal environment of the centrifuge cavity.

Description of drawings

Fig. 1 is the structural representation of the present invention when not using cap;

Fig. 2 is a schematic structural view of the rotor in the present invention;

Fig. 3 is the structural representation of counterweight in the present invention;

Fig. 4 is the structural representation of slideway among the present invention;

Fig. 5 is the structural representation of slideway cover plate among the present invention;

Fig. 6 is a schematic sectional view of the collecting plate installed on the cover plate in the present invention;

Fig. 7 is a top view structural representation of a cap in the present invention;

Fig. 8 is a sectional view along A-A direction of Fig. 7;

Fig. 9 is a B-B direction sectional view of Fig. 8;

Fig. 10 is a schematic structural view of the collection cup in the present invention.

Detailed ways

As shown in Figures 1 to 10, the present invention provides a high-speed centrifuge with counterweight and collection functions, including a body 1, a rotor 4, and a cover plate 5 hinged on the top of the body 1, and the interior of the body 1 is There is a centrifugal chamber 3, the body 1 at the upper opening of the centrifugal chamber 3 is provided with a sealing ring 2, the inside of the body 1 is provided with a rotating motor, and the inner center of the centrifugal chamber 3 is provided with a rotating motor drive The connected rotating shaft, the rotating motor and the rotating shaft are all existing conventional devices, which are not shown in the figure. The rotor 4 is sleeved on the rotating shaft. There are several symmetrical centrifugal holes 7 for placing centrifuge tubes. The upper ends of each centrifugal hole 7 are opened on the upper surface of the rotor 4. The centrifuge tubes are existing conventional devices and are not shown in the figure. The center lines of the centrifugal holes 7 are all parallel to the generatrix of the rotor 4, and the present invention also includes a counterweight device, an anti-splash device and a collection device,

The counterweight device includes a slideway 16 on the outer surface of the rotor 4 at one of the centrifugal holes 8 and a counterweight 12 slidably connected to the slideway 16. The slideway 16 is arranged along the generatrix of the rotor 4. The center position of the bottom of the counterweight 12 is provided with a groove 13, and the opening of the groove 13 is provided with a ball 14, and a compression spring 15 is arranged between the ball 14 and the bottom of the groove 13, and the top of the counterweight 12 A counterweight handle 11 is provided, and several slots 17 matching the balls 14 are provided in the slideway 16 along the generatrix direction of the rotor 4, and a slideway fixedly connected with the slideway 16 is provided outside the slideway 16 The cover plate 9, the slideway cover plate 9 is provided with a bar-shaped hole 10 along the direction of the generatrix of the rotor 4, and the counterweight handle 11 of the counterweight 12 protrudes from the bar-shaped hole 10;

The anti-splashing device includes a cap 21 set on the rotor 4 and two symmetrical fixed ears 26 fixedly connected to the outer surface of the rotor 4 at the same level and located between the top of the slideway 16 and the upper surface of the rotor 4. The cap 21 is a hollow truncated circular shape matched with the rotor 4, and the opening end of the inner wall of the cap 21 is symmetrically provided with two vertical grooves 24 matching the width of the fixed ear 26, and the vertical grooves 24 are connected upwardly inside the cap 21. Circular slot 25, the longitudinal section of the vertical slot 24 and the circular slot 25 is T-shaped, the height of the circular slot 25 is greater than the thickness of the fixing ear 26, so that the fixing ear 26 can be accommodated inside the circular slot 25 Rotate horizontally; the top of the cap 21 is fixedly connected with two mutually symmetrical cap handles 22 for taking in the radial direction; the two fixed ears 26 are located between the top of the slideway 16 and the upper surface of the rotor 4 It is to prevent that when the cap 21 is put on the rotor 4, the cap 21 interferes with the protruding counterweight handle 11 so that the cap 21 cannot be put on the rotor 4;

The collection device includes a collection plate 18 detachably fixedly connected to the middle part of the bottom surface of the cover plate 5 and a collection cup 27 for collection. The collection plate 18 is in the shape of an inverted cone, and the conical apex 20 of the collection plate 18 faces the centrifuge chamber 3 The center of the collection plate 18 is built with a semiconductor cooling chip 19 connected to the power supply. The top center of the cap 21 is provided with a collection cup placement groove 23 for placing a collection cup 27. The shape of the collection cup placement groove 23 is Matching with the shape of the collection cup 27, a collection cup handle 28 is provided on the rim of the collection cup 27 for easy handling.

The front shell of the body 1 is provided with a control panel 8 for controlling the rotation speed of the rotating motor, and the inside of the body 1 is provided with an electric control device connected to the rotating motor, and the control panel 8 is connected with the electric control device through a line . The electric control device may be a PLC, a single-chip microcomputer or an integrated circuit, which is not shown in the figure.

A level 6 is provided at the center of the top of the rotor 4 .

There are six symmetrical centrifugal holes 7 evenly distributed around the rotor 4 .

The shape of the counterweight 12 is a regular square prism or an inverted regular square prism. When the counterweight 12 is installed, this design is convenient for the counterweight 12 to enter the slideway 16, and the operation is convenient. The shape of the counterweight 12 matches the shape of the inner wall of the slideway 16 , and this design makes the counterweight 12 engage with the inner wall of the slideway 16 , which is not easy to shake.

The level 6 provided on the rotor 4 is a circular level.

The detachable fixed connection form of the cover plate 5 and the collecting plate 18 is a bolt connection.

The material of the counterweight 12 in the present invention is metal with high density, such as platinum.

How to use: When performing high-speed centrifugation on an even number of samples, you only need to place the centrifuge tubes containing the samples in the symmetrical centrifuge hole 7, and if you need to perform high-speed centrifugation on an odd number of samples, first place them The sample is placed in the symmetrical centrifugal hole 7, and finally, the last sample is put into the centrifugal hole 7 symmetrical to the slideway 16, the counterweight 12 arranged in the slideway 16 is moved, and the spirit level 6 is observed. When it is horizontal, it means that the rotor 4 is balanced, and the balance weight 12 can be stopped, and then the rotor 4 is covered with the cap 21, and the cap 21 is rotated to fix it on the rotor 4, and then the collection cup 27 is put into the cap 21 The collection cup at the top is placed in the groove 23, and finally, the cover plate 5 is closed, and the conical apex 20 of the collection plate 18 fixedly connected with the cover plate 5 can face the collection cup 27, and the high-speed centrifuge is started through the control panel 8, and the high-speed centrifuge machine to work.

The detachable fixed connection form of the cover plate 5 and the collecting plate 18 can conveniently replace the collecting plate 18 according to different experimental solvents. If ether solvent is used, the collecting plate 18 made of glass should be used. If a strong acid solvent is used, the collecting plate 18 should be used. The collection plate 18 made of glass needs to be removed and replaced with the collection plate 18 made of polytetrafluoroethylene.

When using the counterweight handle 11 to move the counterweight 12, the ball 14 inside the counterweight 12 is extruded from a slot 17 of the slideway 16, and the ball 14 retracts into the groove 13 of the counterweight 12 Inside, the compression spring 15 is compressed, and the counterweight 12 slides in the slideway 16. When it slides to an appropriate position (when the spirit level 6 shows level), stop toggling the counterweight 12, and the compression spring 15 relies on the rebound force to lock the ball 14 Insert in the draw-in groove 17 of this position, counterweight 12 can be stuck.

When installing the cap 21, pick up the cap 21 through the cap handle 22, align the two vertical slots 24 with the two fixed ears 26 on the rotor 4, buckle the cap 21 downward, and pass the two fixed ears 26 through the two Vertical groove 24, until two fixed ears 26 pass through vertical groove 24 to the top of block cap 21, at this moment, two fixed ears 26 fall in the circular groove 25, rotate block cap 21, two fixed ears 26 are in the circular groove 25 Rotate relative to the inner circle (recommended to rotate 90 degrees). After the two fixing ears 26 leave the vertical groove 24, the circular groove 25 can hold the two fixing ears 26, and the cap 21 can be fixed up and down. When rotating, the cap 21 will also be well fixed on the rotor 4 to protect the experimental sample from splashing onto the cover 5 and effectively prevent contamination to the cover 5 .

The collecting plate 18 of the present invention is in the shape of an inverted cone, and can cooperate with the collecting cup 27 to collect. The conical collecting plate 18 slides down into the collecting cup 27 below the conical apex 20. After the high-speed centrifuge is turned on, take out the collecting cup 27 and process the liquid in the collecting cup 27, which can effectively prevent the leaked gas from polluting the cover plate 5 And the internal environment of centrifugal cavity 3.

Described rotating motor, level gauge 6 and semiconductor cooling plate 19 are all existing conventional devices, and specific structure is no longer described in detail.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the protection of the technical solution of the present invention. scope.

Claims (7)

1. A high-speed centrifuge with counterweight and collection functions, including a body, a rotor and a cover plate hinged on the top of the body. The inside of the body is provided with a centrifugal chamber, and the body at the upper opening of the centrifugal chamber is provided with a seal The inside of the body is provided with a rotating motor, and the inner center of the centrifugal chamber is provided with a rotating shaft connected to the rotating motor, and the rotor is sleeved on the rotating shaft. The rotor is evenly distributed along the circumferential direction with several symmetrical centrifugal holes for placing centrifuge tubes, the upper ends of each centrifugal hole are opened on the upper surface of the rotor, and the centerlines of each centrifugal hole are parallel to the generatrix of the rotor. It is characterized in that it also includes a counterweight device, an anti-splash device and a collection device, The counterweight device includes a slideway on the outer surface of the rotor at one of the centrifugal holes and a counterweight slidably connected to the slideway. The slideway is arranged along the generatrix of the rotor, and the center of the bottom of the counterweight A groove is provided, a ball is provided at the opening of the groove, a compression spring is provided between the ball and the bottom of the groove, a counterweight handle is provided on the top of the counterweight, and the inside of the slideway is along the direction of the generatrix of the rotor. There are several slots matching the balls, and a slide cover plate fixedly connected with the slideway is provided outside the slideway. The counterweight handle of the weight protrudes from the bar hole; The anti-splash device includes a cap set on the rotor and two symmetrical fixed ears fixedly connected to the outer surface of the rotor at the same level and located between the top of the slideway and the upper surface of the rotor. The cap is matched with the rotor The open end of the inner wall of the cap is symmetrically provided with two vertical grooves matching the width of the fixed ear, and the vertical grooves are connected upwardly with a circular groove inside the cap, and the vertical grooves are connected with the circular grooves. The longitudinal section is T-shaped, the height of the circular groove is greater than the thickness of the fixed ear, and the top of the cap is fixedly connected radially with two mutually symmetrical cap handles for taking; The collection device includes a collection plate detachably and fixedly connected to the middle part of the bottom surface of the cover plate and a collection cup for collection. A built-in semiconductor refrigeration chip connected to the power supply, the top center of the cap is provided with a collection cup placement groove for placing the collection cup, the shape of the collection cup placement groove matches the shape of the collection cup, the collection cup There is a collection cup handle on the edge of the cup for easy handling. 2. The high-speed centrifuge with counterweight and collection functions according to claim 1, characterized in that: the front shell of the body is provided with a control panel for controlling the rotating speed of the rotating motor, and the inside of the body is provided with a An electric control device connected to a rotating motor, and the control panel is connected with the electric control device through a line. 3. The high-speed centrifuge with counterweight and collection functions according to claim 1, characterized in that: a level is provided at the center of the top of the rotor. 4. The high-speed centrifuge with counterweight and collection functions according to claim 1, characterized in that: the number of symmetrical centrifugal holes evenly distributed in pairs around the rotor is six. 5. The high-speed centrifuge with counterweight and collection functions according to claim 1, characterized in that: the shape of the counterweight is a regular square prism or an inverted regular square prism. 6. The high-speed centrifuge with counterweight and collection functions according to claim 3, characterized in that: the level set on the rotor is a circular level. 7. The high-speed centrifuge with counterweight and collecting functions according to any one of claims 1 to 5, characterized in that: the detachable and fixed connection between the cover plate and the collecting plate is a bolt connection.