阅读说明：本技术 一种利用离心力的食物丙酸含量浸提离心失速保护装置 (Centrifugal stall protection device for leaching content of propionic acid in food by utilizing centrifugal force ) 是由 曹李 刘凯 李子璇 于 2020-11-26 设计创作，主要内容包括：本发明涉及食品安全技术领域,且公开了一种利用离心力的食物丙酸含量浸提离心失速保护装置,包括离心轴,所述离心轴外部活动连接有离心转盘,所述离心转盘中间活动连接有紧固机构,所述离心转盘后端活动连接有安装座,所述安装座外部活动连接有断电线圈,通过改变断电线圈电流流入方向改变,使断电线圈产生磁性发生改变,从而使得断电磁铁受到一个远离安装座方向的推力,这个推力最终会拉伸断电弹簧使其形变进而带动断路触点与驱动触点接触,当断路触点与驱动触点接触时外部驱动源线路被断开,使得离心停止以防止造成更大的损失,从而达到了失速时自动断电降速防止发生进一步损失的效果。(The invention relates to the technical field of food safety, and discloses a food propionic acid content leaching centrifugal stall protection device by utilizing centrifugal force, which comprises a centrifugal shaft, the outer part of the centrifugal shaft is movably connected with a centrifugal turntable, the middle part of the centrifugal turntable is movably connected with a fastening mechanism, the rear end of the centrifugal turntable is movably connected with a mounting seat, the outer part of the mounting seat is movably connected with a power-off coil, the current flowing direction of the power-off coil is changed, so that the magnetism of the power-off coil is changed, so that the power-off magnet is subjected to a thrust force in a direction away from the mounting seat, the thrust force finally stretches the power-off spring to deform the power-off spring so as to drive the circuit-breaking contact to be contacted with the driving contact, the external drive source line is disconnected when the disconnection contact is in contact with the drive contact, so that the centrifugal stop is performed to prevent greater loss, thereby achieving the effect of automatically cutting off and reducing the speed to prevent further loss when stalling.)

1. A centrifugal stall protection device for food propionic acid content leaching by centrifugal force, comprising a centrifugal shaft (1), characterized in that: the centrifugal shaft (1) is externally and movably connected with a centrifugal turntable (2), the middle of the centrifugal turntable (2) is movably connected with a fastening mechanism (3), the rear end of the centrifugal turntable (2) is movably connected with a mounting seat (8), the outer of the mounting seat (8) is movably connected with a power-off coil (9), the outer of the power-off coil (9) is movably connected with a balancing weight (10), the top of the power-off coil (9) is movably connected with a power-off contact (11), the top of the power-off contact (11) is movably connected with a current contact (13), the outer of the current contact (13) is movably connected with a power-off spring (7), the top of the power-off spring (7) is movably connected with a power-off magnet (6), the top of the power-off magnet (6) is movably connected with a circuit breaking contact, the outer part of the power-off magnet (6) is movably connected with a clamping magnet (12);

fastening device (3) are including fastening seat (32), fastening seat (32) outside swing joint has fastening coil (33), fastening coil (33) outside swing joint has fastening spring (34), fastening spring (34) outside swing joint has fastening magnet (35), fastening magnet (35) outside swing joint has clamping layer (36), clamping layer (36) outside swing joint has action wheel (31), action wheel (31) inside swing joint has from driving wheel (37), from driving wheel (37) outside swing joint has fastening block (38).

2. The centrifugal stall protection device for food propionic acid content leaching using centrifugal force of claim 1, wherein: the external swing joint of balancing weight (10) has the connection pad, and this connection pad and current contact (13) swing joint, and balancing weight (10) and centrifuge swing joint, the weight of balancing weight (10) is greater than the centrifugal force that centrifuge produced under normal rotational speed.

3. The centrifugal stall protection device for food propionic acid content leaching using centrifugal force of claim 1, wherein: the central axis of the mounting seat (8) and the central axis of the centrifugal shaft (1) are in the same straight line, and the outside of the centrifugal shaft (1) is movably connected with a cutting rod.

4. The centrifugal stall protection device for food propionic acid content leaching using centrifugal force of claim 1, wherein: the clamping magnets (12) are six in number and distributed outside the centrifugal shaft (1) in an array shape.

5. The centrifugal stall protection device for food propionic acid content leaching using centrifugal force of claim 1, wherein: the driving wheel (31) is meshed with the driven wheel (37), when the driven wheel (37) rotates anticlockwise, the fastening block (38) contracts and the contracted shape is circular, and the size of the fastening block is equal to the size of the hole diameter of the test tube.

6. The centrifugal stall protection device for food propionic acid content leaching using centrifugal force of claim 1, wherein: the magnetism generated outside the fastening coil (33) when the fastening coil is electrified is the same as the magnetism of one end of the fastening magnet (35) close to the fastening seat (32).

Technical Field

The invention relates to the technical field of food safety, in particular to a centrifugal stall protection device for leaching the content of propionic acid in food by utilizing centrifugal force.

Background

Food safety is always a focus of attention, due to the characteristic of food spoilage, food additives are often added into food during production of food manufacturers in consideration of food transportation and storage, additives of cakes and bean products are generally propionic acid, but excessive addition of preservatives can cause damage to human bodies, so the content of the preservatives in the food is often required to be tested, the propionic acid in the food is determined by liquid chromatography and gas chromatography according to the national standard GB/T5009.120-2016, and a centrifugal machine is used for performing differential centrifugation on acidified reagents in a direct extraction method in the liquid chromatography, supernatant is filtered, and then the liquid chromatography is performed.

Direct extraction method generally is used for the cake, bread, when carrying out centrifugal operation, can deposit a large amount of particulate matters in the reagent, can not lead to the fact the damage to the test tube under normal centrifugal rotational speed, nevertheless can take place the impaired phenomenon of test tube wall by a certain sharp-pointed particulate matter striking probably if take place the unusual too high condition of centrifugal rotational speed, and too high centrifugal rotational speed can lead to the fact the injury to centrifuge, thereby serious can cause centrifuge to damage and harm experimenter's healthy even, if the test tube not completely fastens then can cause the test tube to fly out when the centrifugation in the centrifugation process simultaneously and lead to the fact the condition that the reagent was revealed.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a centrifugal stall protection device for food propionic acid content leaching by using centrifugal force is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a food propionic acid content leaching centrifugal stall protection device utilizing centrifugal force, which has the advantages of automatically clamping a test tube to prevent the test tube from falling off in the centrifugal process and automatically cutting off and reducing the speed to prevent further loss in the stall process, and solves the problems that the traditional centrifuge has no protection measures in the stall process and the test tube is easy to fall off in the unclamped centrifugal process.

(II) technical scheme

In order to realize the purposes of automatically clamping the test tube in the centrifugal process to prevent the test tube from falling off and preventing further loss when stalling due to automatic power-off and speed reduction, the invention provides the following technical scheme: a centrifugal stall protection device for food propionic acid content leaching by utilizing centrifugal force comprises a centrifugal shaft, wherein a centrifugal turntable is movably connected to the outer portion of the centrifugal shaft, a fastening mechanism is movably connected to the middle of the centrifugal turntable, the rear end of the centrifugal turntable is movably connected with a mounting seat, a power-off coil is movably connected to the outer portion of the mounting seat, a balancing weight is movably connected to the outer portion of the power-off coil, a power-off contact is movably connected to the top of the power-off coil, a current contact is movably connected to the top of the power-off contact, a power-off spring is movably connected to the outer portion of the current contact, a power-off magnet is movably connected to the top of the power-off spring, a circuit-breaking contact is movably connected to;

the fastening mechanism comprises a fastening seat, a fastening coil is movably connected to the outside of the fastening seat, a fastening spring is movably connected to the outside of the fastening coil, a fastening magnet is movably connected to the outside of the fastening spring, a clamping layer is movably connected to the outside of the fastening magnet, an active wheel is movably connected to the outside of the clamping layer, a driven wheel is movably connected to the inside of the active wheel, and a fastening block is movably connected to the outside of the driven wheel.

Preferably, the outer part of the balancing weight is movably connected with a connecting disc, the connecting disc is movably connected with the current contact, the balancing weight is movably connected with the centrifugal machine, and the weight of the balancing weight is larger than the centrifugal force generated by the centrifugal machine at normal rotating speed.

Preferably, the central axis of the mounting seat and the central axis of the centrifugal shaft are in the same straight line, and the cutting rod is movably connected to the outer portion of the centrifugal shaft.

Preferably, the clamping magnets are six in total and distributed outside the centrifugal shaft in an array.

Preferably, the action wheel meshes with from the driving wheel, and when the driven wheel anticlockwise rotation, the shape of fastening block shrink and its shrink back is circular, and the size equals with the size in the aperture of test tube.

Preferably, the magnetism generated outside the fastening coil when the fastening coil is electrified is the same as the magnetism of one end of the fastening magnet close to the fastening seat.

(III) advantageous effects

Compared with the prior art, the invention provides a centrifugal stall protection device for food propionic acid content leaching by using centrifugal force, which has the following beneficial effects:

1. the centrifugal stall protection device for food propionic acid content leaching by utilizing centrifugal force drives the driven wheel to rotate by rotating the driving wheel, and further drives the fastening block to contract so that the test tube is fastened in the fastening mechanism, when the centrifugal machine performs centrifugal operation, the centrifugal shaft rotates to drive the cutting rod outside the centrifugal shaft to rotate, so that a magnetic induction line between the cutting and clamping magnets generates current, the current flows to the fastening coil through a route to enable the fastening coil to be electrified to generate magnetism, at the moment, the magnetism generated by the fastening coil is the same as the magnetism of one end, close to the fastening coil, of the fastening magnet, so that the fastening magnet can be subjected to thrust far away from the direction of the fastening seat, the thrust finally stretches the fastening spring to deform the fastening spring so as to drive the clamping layer to move towards the direction far away from the fastening seat, so that the test tube is clamped to prevent the test tube from falling in the centrifugal process, along with the increase of centrifugal rotating speed, thereby make the test tube clamp tighter more, thereby reached the automatic clamp test tube in the centrifugal process and prevented its effect that drops.

2. The food propionic acid content leaching centrifugal stall protection device utilizing centrifugal force drives a centrifugal shaft to rotate through an external driving source so as to generate centrifugal force, when the centrifugal device is used for centrifuging at normal rotating speed, external current flows into a power-off contact through a current contact and finally flows into three power-off coils, the current direction is positive at the moment, the magnetism produced by the three power-off coils is positive in the current inflow direction, the current outflow direction is negative, the magnetism produced by the three power-off coils is respectively opposite to the magnetism of one ends of six power-off magnets close to a mounting seat, so that the power-off magnets are pulled to the mounting seat in one direction, when the centrifugal device stalls, the centrifugal force borne by a balancing weight is larger than the self gravity of the balancing weight so as to rotate, and then the current contact is driven to rotate, after half a turn, the current inflow directions of the three power-off coils are changed, and the magnetism, magnetism that three outage coil produced at this moment is like nature with the magnetism that six outage magnets are close to the one end of mount pad respectively to make outage magnet receive a thrust of keeping away from the mount pad direction, this thrust finally can stretch the outage spring and make its deformation and then drive the contact of opening circuit contact and drive contact, external drive source circuit is disconnected when the contact that opens circuit contacts with drive contact, make the centrifugation stop in order to prevent to cause bigger loss, thereby autotomies when having reached the stall and reduces the speed and prevent to take place further loss's effect.

Drawings

FIG. 1 is a schematic view of a centrifugal shaft according to the present invention;

FIG. 2 is a schematic view of the structure of the centrifugal turntable according to the present invention;

FIG. 3 is a schematic view of the mounting base of the present invention;

FIG. 4 is a schematic view of the deenergizing magnet of the present invention;

FIG. 5 is an enlarged view of the position A in the schematic view of the centrifugal shaft of FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the fastening mechanism of the present invention;

FIG. 7 is a schematic view of a driving wheel structure according to the present invention;

fig. 8 is a schematic view of a fastening coil structure according to the present invention.

In the figure: 1. a centrifugal shaft; 2. a centrifugal turntable; 3. a fastening mechanism; 4. an open circuit contact; 5. a drive contact; 6. powering off the magnet; 7. a power-off spring; 8. a mounting seat; 9. a power-off coil; 10. a balancing weight; 11. a power-off contact; 12. a clamping magnet; 13. a current contact; 31. a driving wheel; 32. a fastening seat; 33. fastening the coil; 34. a fastening spring; 35. fastening a magnet; 36. a clamping layer; 37. a driven wheel; 38. and (5) fastening the block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a centrifugal stall protection device for food propionic acid content extraction by centrifugal force comprises a centrifugal shaft 1, a centrifugal turntable 2 movably connected to the outside of the centrifugal shaft 1, a fastening mechanism 3 movably connected to the middle of the centrifugal turntable 2, a mounting base 8 movably connected to the rear end of the centrifugal turntable 2, a cutting rod movably connected to the outside of the centrifugal shaft 1, a power-off coil 9 movably connected to the outside of the mounting base 8, a balancing weight 10 movably connected to the outside of the power-off coil 9, a connecting disc movably connected to the outside of the balancing weight 10 and movably connected to a current contact 13, the balancing weight 10 movably connected to a centrifuge, the weight of the balancing weight 10 being greater than the centrifugal force generated at normal rotation speed, a power-off contact 11 movably connected to the top of the power-off coil 9, and a current contact 13 movably connected to the top of the power-off contact 11, the outer part of the current contact 13 is movably connected with a power-off spring 7, the top of the power-off spring 7 is movably connected with a power-off magnet 6, the top of the power-off magnet 6 is movably connected with a power-off contact 4, the top of the power-off contact 4 is movably connected with a driving contact 5, the outer part of the power-off magnet 6 is movably connected with clamping magnets 12, and the six clamping magnets 12 are distributed outside the centrifugal shaft 1 in an array shape;

fastening device 3 includes fastening seat 32, fastening seat 32 outside swing joint has fastening coil 33, fastening coil 33 outside swing joint has fastening spring 34, fastening spring 34 outside swing joint has fastening magnet 35, the magnetism that its outside produced when fastening coil 33 circular telegram is the same as the magnetism that fastening magnet 35 is close to fastening seat 32 one end, fastening magnet 35 outside swing joint has clamping layer 36, clamping layer 36 outside swing joint has action wheel 31, action wheel 31 meshes with follow driving wheel 37, and when following wheel 37 anticlockwise rotation, the shape of fastening block 38 shrink and its shrink is circular, the size equals with the size in the aperture of test tube, action wheel 31 inside swing joint has follow driving wheel 37, follow driving wheel 37 outside swing joint has fastening block 38.

The working principle is as follows: the centrifugal stall protection device for food propionic acid content leaching by utilizing centrifugal force is characterized in that a test tube filled with a reagent is placed into a fastening mechanism 3 when the device is used, a driving wheel 31 is rotated to drive a driven wheel 37 to rotate, and further a fastening block 38 is driven to shrink so that the test tube is fastened in the fastening mechanism 3, when a centrifugal machine carries out centrifugal operation, a centrifugal shaft 1 rotates to drive a cutting rod outside the centrifugal shaft to rotate, so that a magnetic induction line between clamping magnets 12 is cut to generate current, the current flows to a fastening coil 33 through a circuit to enable the fastening coil 33 to be electrified to generate magnetism, the magnetism generated by the fastening coil 33 is the same as the magnetism of one end, close to the fastening coil 33, of the fastening magnet 35, so that the fastening magnet 35 can receive thrust in the direction far away from a fastening seat 32, and the thrust finally stretches a fastening spring 34 to enable the fastening spring to deform so as to drive a clamping, thereby press from both sides the test tube at centrifugal in-process and press from both sides tightly and prevent it and drop, along with increasing of centrifugation rotational speed, the electric current that 1 outside cutting rod cutting magnetic induction line of centrifugal shaft produced is big more to make the tighter of test tube clamp, thereby reached automatic clamp test tube in the centrifugation process and prevented its effect that drops.

The food propionic acid content leaching centrifugal stall protection device utilizing centrifugal force can drive the centrifugal shaft 1 to rotate when centrifugal operation is carried out, so that centrifugal force is generated, when centrifugation is carried out at normal rotating speed, external electricity flows into the power-off contacts 11 through the current contacts 13 and finally flows into the three power-off coils 9, the current direction is positive at the moment, the magnetism produced by the three power-off coils 9 is positive in the current flowing direction, the current flowing direction is negative, the magnetism produced by the three power-off coils 9 is opposite to the magnetism of one ends, close to the mounting seat 8, of the six power-off magnets 6 respectively, so that the power-off magnets 6 are pulled towards the mounting seat 8 in one direction, when the centrifuge stalls, the centrifugal force borne by the balancing weight 10 is larger than the self gravity to rotate, so that the current contacts 13 are driven to rotate, after half a circle of rotation, the current flowing direction of the three power-off coils 9 is changed, the outage coil 9 produces magnetism and changes this moment, magnetism that three outage coil 9 produced this moment is the homopolar with the magnetism that six outage magnets 6 are close to the one end of mount pad 8 respectively, thereby make outage magnet 6 receive a thrust of keeping away from 8 directions of mount pad, this thrust finally can stretch out outage spring 7 and make its deformation and then drive the contact of breaking contact 4 and drive contact 5, the external drive source circuit is disconnected when the contact 4 that breaks contacts 5 contacts, make the centrifugation stop in order to prevent to cause bigger loss, thereby the effect of further loss is prevented to the automatic power-off deceleration when having reached the stall.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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