CN218962960U - Low-noise medical centrifugal machine - Google Patents

Abstract

The utility model provides a low-noise medical centrifugal machine, which comprises a shell, a centrifugal chamber and an upper cover, wherein the centrifugal chamber is embedded into the shell, the upper cover is rotationally connected with the shell, a rotor assembly is arranged in the centrifugal chamber, a motor is arranged in the shell, an output shaft of the motor is inserted into the centrifugal chamber, and the output shaft of the motor is connected with the rotor assembly; the periphery of the centrifugal chamber is provided with an exhaust hole, the periphery of the centrifugal chamber is sleeved with a metal plate shield, a sponge is filled between the metal plate shield and the centrifugal chamber, the distance between the lower end surface of the metal plate shield and the exhaust hole in the vertical direction is more than 20mm, the height of the exhaust hole is lower than the horizontal height of the upper surface of the rotor assembly, and the height of the exhaust hole is higher than the middle part of the rotor assembly in the vertical direction; the rear side of upper cover is offered first air intake, and the lower surface middle part of upper cover is equipped with the second air intake, and first air intake and second air intake pass through L type wind channel intercommunication. The medical centrifugal machine has the advantages of low noise and the like.

Description

Low-noise medical centrifugal machine

Technical Field

The utility model relates to the technical field of centrifuges, in particular to a low-noise medical centrifuge.

Background

The principle of centrifuges is to use centrifugal force, devices that separate liquids and solid particles or components in a mixture of liquid and liquid. The medical centrifugal machine bears small functions in units such as hospitals, biological laboratories, scientific researches, medicine enterprises and the like. In particular, the centrifugal centrifuge has the body and shadow of the centrifugal centrifuge in the fields of various market segments, data centers, new materials, chip manufacturing, new energy sources, biological medicines and the like.

The problems of noise, vibration, temperature rise and the like of the high-speed medical centrifugal machine are always the problems which are continuously solved by centrifugal machine manufacturers, and are also important points of technical innovation. In a high-speed centrifugal machine, when the rotating speed of the inner rotor of a centrifugal chamber reaches 16000rpm, the wind noise brought by the rotor is very easy to cause discomfort of a human body, and the user experience is influenced. Wind noise is too loud and represents internal airflow turbulence, so that the air with friction and temperature rise cannot be discharged. Finally, the temperature of the experimental reagent is excessively high, the experimental result is affected, and meanwhile, the sample is wasted. The utility model provides a simple, practical and bottom-cost metal plate structure of a centrifugal machine.

Disclosure of Invention

In order to solve the technical problems of large rotation noise and the like of a centrifugal machine in the prior art, the utility model provides the following technical scheme:

the utility model provides a low-noise medical centrifugal machine, which comprises a shell, a centrifugal chamber and an upper cover, wherein the centrifugal chamber is embedded into the shell, the upper cover is rotationally connected with the shell, a rotor assembly is arranged in the centrifugal chamber, a motor is arranged in the shell, an output shaft of the motor is inserted into the centrifugal chamber, and the output shaft of the motor is connected with the rotor assembly;

the periphery of the centrifugal chamber is provided with an exhaust hole, the periphery of the centrifugal chamber is sleeved with a metal plate shield, a sponge is filled between the metal plate shield and the centrifugal chamber, the distance between the lower end surface of the metal plate shield and the exhaust hole in the vertical direction is more than 20mm, the height of the exhaust hole is lower than the horizontal height of the upper surface of the rotor assembly, and the height of the exhaust hole is higher than the middle part of the rotor assembly in the vertical direction;

the rear side of the upper cover is provided with a first air inlet, the middle part of the lower surface of the upper cover is provided with a second air inlet, and the first air inlet is communicated with the second air inlet through an L-shaped air channel;

the bottom of the shell is provided with a bottom plate, and an air outlet is arranged between the motor and the bottom plate.

Further, a mounting flange is arranged in the circumferential direction of the motor, a mounting hole is formed in the mounting flange, the top of the damping support block is connected with the mounting hole through bolts, the bottom of the damping support block is fixedly connected with the equal-height block, and the bottom of the equal-height block is fixedly connected with the bottom plate.

Further, an unbalanced switch is arranged at the lower part of the motor, the unbalanced switch is arranged on a bracket, and the bracket is arranged on the bottom plate.

Further, a rotating unit is arranged between the upper cover and the shell and comprises an upper hinge and a lower hinge which are connected through pin shafts, the upper hinge is fixedly connected with the upper cover, and the lower hinge is fixedly connected with the shell.

Further, the centrifugal machine further comprises a controller, a bolt which is vertically arranged is arranged at the bottom of the upper cover, a bolt hole is formed in the lower portion of the bolt, an electromagnetic lock is arranged in the shell, a lock core of the electromagnetic lock can be inserted into the bolt hole, and the electromagnetic lock is electrically connected with the controller.

Further, the lock core of electromagnetic lock connects urgent safety rope, sets up the fixed orifices on the shell, and the fixed block of embedding in the fixed orifices sets up the shoulder hole in the fixed block, and urgent safety rope's end is fixed in the shoulder hole, and the periphery of fixed block is the ladder type, and the fixed orifices is held in the end of fixed block, and the sealing washer is installed to the circumference of fixed orifices.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The low-noise medical centrifugal machine changes the originally chaotic convection mode in the centrifugal chamber into that: the upper air inlet and the lower air exhaust are beneficial to reducing the temperature rise of the test solution in the rotor assembly. The heat generated by high-speed rotation of the motor is reduced to enter the centrifugal chamber, so that the temperature rise of the rotor assembly is reduced;

(2) According to the low-noise medical centrifugal machine, the convection mode of air in the centrifugal chamber is smooth, the sealing performance brought by the fact that redundant radiating holes are not formed in the periphery of a shell of the medical centrifugal machine is matched, the internal noise is not easy to diffuse by the aid of the internal silencing coating, and finally the medical centrifugal machine weakens the noise to be below 55 dB. The product performance is greatly improved, and the product competitive advantage is increased;

(3) The low-noise medical centrifugal machine provided by the utility model has the advantages that when a sample of the test solution rotates at a high speed, trace aerosol is easy to be dispersed out, and part of aerosol of the test solution is harmful to human bodies. More or less exhaust ports are arranged around the medical centrifuge shell in the market, so that the diffusion height and area of aerosol are increased. The unique air outlet of the shell is innovatively arranged at the bottom of the electric shell, so that the diffusion height and area of aerosol can be reduced as much as possible. The safety of personnel can be greatly improved in workshops or laboratories with purification requirements;

(4) The low-noise medical centrifugal machine is provided with the door interlock and the emergency safety rope, so that personnel safety can be ensured in the experimental process, and the door can be rapidly opened for disposal when faults occur;

(5) According to the low-noise medical centrifugal machine, the motor shaft sleeve is additionally arranged between the rotor assembly and the motor output shaft, so that the rotor assembly is convenient to adapt to motor output shafts with different sizes, the motor output shaft can also adapt to rotor assemblies with different specifications, and the effects of reducing cost and enhancing efficiency can be achieved in design development, product verification and workshop assembly.

Drawings

FIG. 1 is a schematic structural view of a low noise medical centrifuge of the present utility model;

FIG. 2 is a schematic view of another view of the low noise medical centrifuge of the present utility model;

FIG. 3 is a schematic view of a rotary unit according to the present utility model;

FIG. 4 is an assembled view of the latch and electromagnetic lock of the present utility model;

FIG. 5 is a cross-sectional view of a fixed block of the present utility model;

FIG. 6 is a schematic diagram of an unbalanced switch according to the present utility model;

fig. 7 is a schematic structural view of a rotor assembly according to the present utility model.

In the figure: 1-a centrifugal chamber; 11-exhaust holes; 2-an upper cover; 21-a bolt; 22-electromagnetic lock; 23-emergency safety line; 24-fixing blocks; 25-sealing rings; 26-knots; 3-rotor assembly; 31-rotor cover; 32-rotor cover handle; 33-rotor mount; 34-motor shaft sleeve; 35-a motor shaft pin; 36-a motor output shaft; 37-elastic baffle; 4-an electric motor; 5-a sheet metal shield; 6-an air outlet; 7-a damping support block; 8-contour blocks; 9-unbalanced switching; 91-contacts; 92-cushion blocks; 93-sensing a copper sheet; 10-a bracket; 12-a rotation unit; 121-upper hinge; 122-lower hinge; 13-a bottom plate; 14-a housing; 15-bolts.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc., are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model, and it should be noted that the terms "mounted", "connected" should be construed broadly, for example, may be fixedly connected, may be detachably connected, may be mechanically connected, may be indirectly connected through intermediate media, or may be electrically connected, and may be construed in a specific meaning of terms in the present utility model in a specific case.

Example 1

The embodiment provides a low-noise medical centrifugal machine, as shown in fig. 1-7, the centrifugal machine comprises a shell, a centrifugal chamber 1 and an upper cover 2, wherein the centrifugal chamber 1 is embedded into the shell, the upper cover 2 is rotationally connected with the shell, a rotor assembly 3 is arranged in the centrifugal chamber 1, a motor 4 is arranged in the shell, an output shaft of the motor 4 is inserted into the centrifugal chamber 1, and an output shaft of the motor 4 is connected with the rotor assembly 3.

The periphery of the centrifugal chamber 1 is provided with an exhaust hole 11, the periphery of the centrifugal chamber 1 is sleeved with a metal plate shield 5, sponge is filled between the metal plate shield 5 and the centrifugal chamber 1, the distance between the lower end face of the metal plate shield 5 and the exhaust hole 11 in the vertical direction is greater than 20mm, the height of the exhaust hole 11 is lower than the horizontal height of the upper surface of the rotor assembly 3, and the height of the exhaust hole 11 is higher than the middle part of the rotor assembly 3 in the vertical direction.

The rear side of upper cover 2 is offered first air intake, and the lower surface middle part of upper cover 2 is equipped with the second air intake, and first air intake and second air intake pass through L type wind channel intercommunication.

The bottom of the shell is provided with a bottom plate, and an air outlet 6 is arranged between the motor 4 and the bottom plate.

The motor 4 is connected with the bottom plate 13 through the damping support block 7 and the equal-height block 8, and the motor output shaft 36 extends into the centrifugal chamber 1 and is fixed with the rotor assembly 3 through screw thread fit. The side wall of the centrifugal chamber 1 is provided with an exhaust hole 11 for heat dissipation. By adapting the damping support blocks 7 and the contour blocks 8, the relative position of the rotor assembly 3 and the exhaust holes 11 of the centrifugal chamber 1 is kept within a certain range. The discharge opening 11 of the centrifugal chamber 1 is slightly above the middle position of the rotor assembly 3, but cannot exceed the upper surface of the rotor assembly 3. A layer of sheet metal shield 5 is sleeved outside an exhaust hole 11 of the centrifugal chamber 1, and a middle-low density loose sponge is filled between the sheet metal shield 5 of the centrifugal chamber and the centrifugal chamber 1. The lowest end of the centrifugal chamber sheet metal shield 5 needs to be 20mm or more below the exhaust hole. The sealing ring is arranged on the lower surface of the upper cover 2, and after the upper cover 2 is closed, the sealing ring is pressed tightly, so that convection gas between the centrifugal chamber 1 and the outer side can only pass through the air channel in the upper cover 2. When the motor 4 rotates at a high speed, the wind speed at the exhaust hole 11 of the centrifugal chamber increases, and the air pressure decreases. The area between the centrifugal chamber sheet metal shield 5 and the centrifugal chamber 1 can extend the low pressure area so that the air flow is more easily led. The air flow formed by the rotation of the rotor assembly 3 is led through the low pressure area and enters the inner cavity of the centrifugal machine by inertia. The motor 4 in the centrifugal machine works to generate a large amount of heat, and the air flow generated in the centrifugal chamber discharges the high-temperature air near the motor 4 through the radiating holes at the bottom of the shell. The sponge with medium and low density is filled between the centrifugal chamber sheet metal shield 5 and the centrifugal chamber, and the sponge is loose due to the self material, so that the sound formed by the airflow can be greatly reduced.

Ambient temperature air enters through the first air inlet at the rear of the upper cover 2 and finally enters the centrifugal chamber 1 through the second air inlet. The sealing ring is arranged, so that the internal air is not easy to leak.

The noise of the centrifugal machine is mainly the working noise of the motor 4 and the wind noise of the air flow formed by the rotation of the rotor assembly 3. The working noise of the motor 4 is reduced by spraying a silencing coating inside the sheet metal shell. The air current that rotor assembly 3 rotatory produced very easily produces the whistle when passing through the centrifugal chamber hole of airing exhaust, sets up centrifugal chamber panel beating guard shield 5 outside centrifugal chamber 1 hole of airing exhaust 11, can avoid the whistle. But the flow of the shield gas 5 through the shield plate is extremely easy to generate cavity echo between the shield plate and the centrifugal chamber 1. The loose sponge layer is added in the cavity, so that cavity echo can be weakened, and the effect of reducing wind noise is achieved.

Experiments show that when the rotating speed of the motor reaches 16000rpm, the noise of the whole machine can be reduced to below 55 dB, and the comfort of personnel is greatly improved. Meanwhile, the temperature rise of the test solution in the rotor assembly 3 is lower than 15 ℃, and the use requirement of personnel is met.

Further, a mounting flange is arranged in the circumferential direction of the motor 4, a mounting hole is formed in the mounting flange, the top of the shock absorption supporting block 7 is connected with the mounting hole through bolts, the bottom of the shock absorption supporting block is fixedly connected with the equal-height block 8, and the bottom of the equal-height block 8 is fixedly connected with the bottom plate.

Further, an unbalanced switch 9 is installed at the lower part of the motor 4, the unbalanced switch 9 is installed on a bracket 10, and the bracket 10 is installed on the bottom plate.

The motor 4 is connected with the damping support block 7 through bolts, and the damping support block 7 is connected with the contour block 8 through bolts. The contour blocks 8 are connected with the bottom plate 13 of the centrifuge shell through socket head cap screws. The motor 4 is fixed in the mode, so that the motor 4 has certain flexibility, and when the heavy-load rotor assembly 3 is driven to rotate at a high speed, a part of offset shaking quantity of the motor 4 caused by unbalanced rotation of the rotor assembly 3 can be counteracted. An unbalanced switch 9 is arranged at the bottom of the motor 4 for limiting the offset shaking amount of the motor 4. The unbalance switch 9 is connected to a bracket 10 by bolts, and the bracket 10 is fixed to a centrifuge housing bottom plate 13 by screws. In the experimental process, once the deflection shaking amount at the bottom of the motor 4 exceeds the deflection amount bearable by the unbalanced switch 9, the whole machine is stopped and alarms, so that the safety of personnel is protected.

Further, a rotating unit 12 is installed between the upper cover 2 and the housing, the rotating unit 12 includes an upper hinge 121 and a lower hinge 122 connected by a pin, the upper hinge 121 is fixedly connected with the upper cover 2, and the lower hinge 122 is fixedly connected with the housing.

The opening of the upper cover 2 is accomplished by the rotation unit 12, and the upper hinge 121 is connected to the upper cover 2 by the bolts 15, while the connection of the centrifuge lower housing to the lower hinge 122 is accomplished by the bolts 15. The upper hinge 121 and the lower hinge 122 are connected in such a manner that a hinge center shaft and a center shaft mounting hole are required. The matched hinge central shaft can enable the upper hinge and the lower hinge to complete opening and closing actions and can not enable the upper hinge and the lower hinge to be separated. The lower hinge 122 includes a spring for pressing against the upper hinge 121 so that the upper cover 2 is not easily closed after being opened.

Further, the centrifuge further comprises a controller, a bolt 21 is vertically arranged at the bottom of the upper cover 2, a bolt hole is formed in the lower portion of the bolt 21, an electromagnetic lock 22 is arranged in the shell, a lock core of the electromagnetic lock 22 can be inserted into the bolt hole, and the electromagnetic lock 22 is electrically connected with the controller.

Further, the lock core of the electromagnetic lock 22 is connected with an emergency safety rope 23, a fixing hole is formed in the shell, a fixing block 24 is embedded in the fixing hole, a stepped hole is formed in the fixing block 24, the tail end of the emergency safety rope is fixed in the stepped hole, the periphery of the fixing block 24 is stepped, the tail end of the fixing block 24 abuts against the fixing hole, and a sealing ring 25 is circumferentially arranged in the fixing hole.

The latch 21 is connected to the upper cover 2 by a bolt. When the upper cover 2 is dropped, the latch 21 enters the centrifuge cavity from the centrifuge housing opening. And an electromagnetic lock 22 is arranged at the corresponding position in the inner cavity of the centrifugal machine, and a mandrel of the electromagnetic lock 22 is accurately inserted into a bolt hole of the upper cover 2, so that the upper cover 2 is fixed. An emergency safety rope 23 is connected to the rear of the mandrel of the electromagnetic lock 22. The emergency safety line 23 is connected to the safety line holder via an emergency safety line outlet. The centrifuge is required to ensure that the upper cover 2 is closed before starting. When the upper cover 2 is closed, the electromagnetic lock 22 core shaft completes the fixation of the upper cover 2 bolt. The electromagnetic lock 22 transmits an electric signal corresponding to the closing of the upper cover to the control system, and the control system detects the signal of closing the upper cover 2 and then controls the motor 4 to start.

After the emergency safety rope 23 passes through the step hole, a knot 26 is formed at the tail end of the safety rope in a knotting way so as to prevent the safety rope from falling off. A glass cement or structural cement or other glue is injected into the stepped hole to assist in securing the knot 26. The gap between the sealing ring 25 and the fixed block 24 is slightly smaller than the thickness of the shell. The outer diameter of the sealing ring 25 is slightly larger than the safety rope outlet reserved in the shell. The fixing piece 25 and the emergency safety rope 23 are connected and fixed, and the fixing block 24 is required to be plugged into the centrifugal machine shell. Due to the design of the relevant dimensions of the sealing ring 25, the tail end of the fixing block 25 is relatively flexibly fixed outside the centrifugal machine shell, falling and shaking are not easy to occur, and the taking is convenient. Through setting up the safety rope, centrifuge can normally uncap and take the sample when equipment link or unusual outage shut down.

The rotor cover handle 32 and the elastic shutter 37 restrict the rotor cover 31 to the set position. The rotor cover handle 32 is threadably connected to the rotor assembly 3. The rotor assembly 3 is connected with the motor output shaft 36 through the motor shaft sleeve 34, and the rotor assembly 3 is fixed on the motor shaft sleeve 34 by bolts. The motor shaft sleeve 34 is connected to the motor output shaft 36 via the rotor mount 33. The motor output shaft 36 is radially provided with a motor shaft pin 35, and the motor shaft pin 35 can be sunk into a bar-shaped hole of the motor shaft sleeve 34 after being installed. When the motor output shaft 36 rotates, the motor shaft pin 35 is driven to rotate, and the motor shaft pin 35 is limited by the bar-shaped hole to drive the motor shaft sleeve 34 to rotate. The motor shaft sleeve 34 drives the rotor assembly 3 to rotate through bolts.

The motor shaft sleeve 34 with various structures is beneficial to matching motor shafts with different types of rotor bodies and different specifications and models, and is beneficial to reducing cost and enhancing efficiency in production links.

The unbalanced switch 9 is a normally open switch, and is considered to be unbalanced when the internal circuit is closed. The cushion block 92 contacts with the tail of the motor 4, and the position of the bracket 10 is adjusted, so that the distance between the contact 91 and the induction copper sheet 93 is about 3 mm. When the motor 4 tilts or vibrates greatly, the vibration quantity is transmitted to the cushion block 92 contacted with the tail of the motor 4, and the cushion block 92 drives the contact 91 to displace. When the displacement exceeds 3mm, the contact 91 is in contact with the sensing copper sheet 93, and the unbalanced switch 9 is internally conducted. The conduction signal is transmitted to the controller, and the controller forcedly cuts off the power of the motor 4 after receiving the unbalanced switch conduction signal.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (6)

1. The low-noise medical centrifugal machine is characterized by comprising a shell, a centrifugal chamber and an upper cover, wherein the centrifugal chamber is embedded into the shell, the upper cover is rotationally connected with the shell, a rotor assembly is arranged in the centrifugal chamber, a motor is arranged in the shell, an output shaft of the motor is inserted into the centrifugal chamber, and the output shaft of the motor is connected with the rotor assembly;

the periphery of the centrifugal chamber is provided with an exhaust hole, the periphery of the centrifugal chamber is sleeved with a metal plate shield, a sponge is filled between the metal plate shield and the centrifugal chamber, the distance between the lower end surface of the metal plate shield and the exhaust hole in the vertical direction is more than 20mm, the height of the exhaust hole is lower than the horizontal height of the upper surface of the rotor assembly, and the height of the exhaust hole is higher than the middle part of the rotor assembly in the vertical direction;

the rear side of the upper cover is provided with a first air inlet, the middle part of the lower surface of the upper cover is provided with a second air inlet, and the first air inlet is communicated with the second air inlet through an L-shaped air channel;

the bottom of the shell is provided with a bottom plate, and an air outlet is arranged between the motor and the bottom plate.

2. The low noise medical centrifuge of claim 1, wherein a mounting flange is circumferentially arranged on the motor, mounting holes are formed in the mounting flange, the top of the shock-absorbing support block is connected with the mounting holes through bolts, the bottom of the shock-absorbing support block is fixedly connected with the equal-height block, and the bottom of the equal-height block is fixedly connected with the bottom plate.

3. The low noise medical centrifuge of claim 1 wherein an unbalanced switch is mounted to a lower portion of the motor, the unbalanced switch being mounted to a bracket, the bracket being mounted to the base plate.

4. The low noise medical centrifuge of claim 1, wherein a rotation unit is installed between the upper cover and the housing, the rotation unit comprises an upper hinge and a lower hinge which are connected by a pin, the upper hinge is fixedly connected with the upper cover, and the lower hinge is fixedly connected with the housing.

5. The low noise medical centrifuge of claim 1, further comprising a controller, wherein a vertically disposed latch is mounted at the bottom of the upper cover, a latch hole is formed in the lower portion of the latch, an electromagnetic lock is mounted in the housing, and a lock core of the electromagnetic lock can be inserted into the latch hole, and the electromagnetic lock is electrically connected with the controller.

6. The low noise medical centrifuge of claim 5, wherein the lock core of the electromagnetic lock is connected with the emergency safety rope, the housing is provided with a fixing hole, the fixing hole is internally embedded with a fixing block, the fixing block is internally provided with a stepped hole, the tail end of the emergency safety rope is fixed in the stepped hole, the periphery of the fixing block is stepped, the tail end of the fixing block abuts against the fixing hole, and the sealing ring is circumferentially arranged on the fixing hole.

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