CN115770505A

CN115770505A - Magnetic stirring machine

Info

Publication number: CN115770505A
Application number: CN202211567638.4A
Authority: CN
Inventors: 王晓东; 刁正良; 黄成�; 王金龙; 孙汝斌; 戴宁; 旦增; 钟方宇; 蒋赵侠; 谭坤
Original assignee: Tibet Shengyuan Environmental Engineering Co ltd
Current assignee: Tibet Shengyuan Environmental Engineering Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-03-10

Abstract

The invention discloses a magnetic stirrer, which comprises an operating platform, a magnetic stirring bottle arranged on the operating platform, a driving device and a clamping structure for fixing the stirring bottle, wherein the magnetic stirring bottle is arranged on the operating platform; the operating platform comprises a first operating platform for placing the magnetic stirring bottle, a second operating platform arranged in the first operating platform and a turntable arranged on the second operating platform; the driving device comprises a first driving motor, a rotating shaft connected to the first driving motor, a screw, a second driving motor used for driving the screw to rotate and a square magnet connected to the screw through a threaded structure; the second driving motor is fixed on the turntable, the rotating shaft is connected to the axis of the turntable, and a hole is formed in the rotating shaft and the screw penetrates through the hole; the magnet is arranged on the turntable. It can be suitable for the use of the agitator bottle of different diameter specifications.

Description

Magnetic stirring machine

Technical Field

The invention relates to the field of magnetic stirring devices, in particular to a magnetic stirrer.

Background

Magnetic stirrers are laboratory instruments used for mixing liquids, primarily for stirring or simultaneously heating and stirring low-viscosity liquids or solid-liquid mixtures. The basic principle is that magnetic stirrer inside container is driven by magnetic field to rotate circularly to stir liquid.

It adopts the magnet to drive the magnetic stirrers rotation in the stirred tank and realizes the stirring of current magnetic stirrers, however, the pivoted radius of magnet of current magnetic stirrers can not change, and a model is only started the use of a specification or great stirred tank of diameter promptly, if stirred tank diameter relative magnet turning radius undersize, magnet when driving the magnetic stirrers rotation, the magnetic stirrers very easily collides with the bottle wall, is difficult for using.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a magnetic stirrer which can be suitable for stirring bottles with different diameters.

The purpose of the invention is realized by the following technical scheme:

a magnetic stirrer comprises an operating platform, a magnetic stirring bottle arranged on the operating platform, a driving device and a clamping structure for fixing the magnetic stirring bottle;

the operating platform comprises a first operating platform for placing the magnetic stirring bottle, a second operating platform arranged in the first operating platform and a turntable arranged on the second operating platform;

the driving device comprises a first driving motor, a rotating shaft connected to the first driving motor, a screw, a second driving motor used for driving the screw to rotate and a square magnet connected to the screw through a threaded structure;

the second driving motor is fixed on the turntable, the rotating shaft is connected to the axis of the turntable, and a hole is formed in the rotating shaft and the screw penetrates through the hole; the magnet is arranged on the turntable.

Preferably, the magnetic stirring bottle comprises a bottle body, a top cover arranged on the bottle body and a magnetic stirring structure arranged on the bottle cover,

the top cover is in a cylindrical shape with openings at two ends, threads for connecting with the bottle body are arranged on the inner walls of the two ends, a partition plate for dividing the inner cavity of the top cover into two parts is arranged in the top cover, and a hole is formed in the center of the partition plate;

the magnetic stirring structure comprises a hard shaft, a magnetic stirrer, a flexible shaft and a clamping block, wherein the flexible shaft and the clamping block are connected between the hard shaft and the magnetic stirrer;

one end of the hard shaft is smaller than the diameter of the hole and the other end of the hard shaft is larger than the diameter of the hole.

Preferably, the hard shaft comprises a first hard shaft and a second hard shaft connected with the first hard shaft, the diameter of the first hard shaft is smaller than that of the second hard shaft, the diameter of the second hard shaft is larger than that of the hole, the diameter of the first hard shaft is smaller than that of the hole, one end of the first hard shaft is connected with the clamping block, and one end of the second hard shaft is connected with the flexible shaft.

Preferably, the improved structure further comprises a cover body which is in threaded connection with the end part of the top cover, and threads which are used for being connected with the cover body are arranged on the outer walls of the two ends of the top cover.

Preferably, one end of the screw is provided with a limiting structure, and the magnet is arranged between the limiting structure and the rotating shaft.

The invention has the following advantages:

this scheme is fixed second driving motor on the carousel, and the magnet cup joints on the screw rod through the screw, and when second motor drive screw rotated, because the magnet becomes the direction, the carousel rotated it spacingly, can drive it along rectilinear movement, can adjust its and the distance of pivot, realized different stirring radius's regulation, was suitable for the stirring bottle of different diameter specifications to use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention conventionally lay out when in use, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

As shown in FIG. 1, the invention provides a magnetic stirrer, which comprises an operating platform, a magnetic stirring bottle arranged on the operating platform, a driving device and a clamping structure for fixing the magnetic stirring bottle; in order to improve the coincidence of the axis and the rotating shaft of the magnetic stirring bottle when the magnetic stirring machine works and clamps the magnetic stirring bottle, the clamping structure can adopt the patent technology applied by the company, and the specific details are seen in the container clamp structure in the 'magnetic stirring device easy to operate' with the application number of 202022772873.8, which is not described herein again.

The operating platform comprises a first operating platform 11 for placing a magnetic stirring bottle, a second operating platform 12 placed in the first operating platform 11 and a rotating disk 13 placed on the second operating platform 12; there is no connection between the turntable 13 and the second turntable, which avoids affecting the rotation of the turntable.

The driving device comprises a first driving motor 21, a rotating shaft 22 connected to the first driving motor 21, a screw 23, a second driving motor 24 for driving the screw 23 to rotate, and a square magnet 25 connected to the screw 23 through a thread structure;

the second driving motor 24 is fixed on the rotary table 13, the rotating shaft 22 is connected on the axis of the rotary table 13, a hole is arranged on the rotating shaft 22, and the screw 23 penetrates through the hole; the magnet 25 is placed on the turntable 13.

The magnet is provided with a screw hole which is sleeved on the screw rod, and the magnet and the turntable do not have a connection relation, so that the position adjustment of the magnet on the turntable is avoided being influenced. The second driving motor 24 is fixed on the turntable, a hole is arranged on the rotating shaft 22, the screw rod rotates through the hole, and one end of the screw rod is fixedly connected with the second motor. When the magnetic stirring bottle is used, the second motor does not work, the position of the magnet is fixed, and the first driving motor drives the turntable to rotate so as to drive the magnet to rotate, so that the magnetic stirrer in the magnetic stirring bottle is driven to rotate. When the magnetic stirring bottles with different diameters need to be replaced, the first driving motor does not work, the second driving motor drives the screw rod to rotate, the magnet is square, the rotary table limits the circumferential rotation of the rotary table, at the moment, the magnet moves linearly along the screw rod, the magnet is far away from the rotating shaft 22 or close to the rotating shaft 22, the adjustment of the rotating radius of the magnet is achieved, and therefore the magnetic stirring bottles with different diameters are matched.

The magnetic stirring bottle comprises a bottle body 31, a top cover arranged on the bottle body 31 and a magnetic stirring structure arranged on a bottle cover, the bottle body can be the same as the prior art, two-mouth bottles are selected, and the top cover is connected to a bottle mouth.

The top cover 321 is in a cylindrical shape with two open ends, the inner walls of the two ends are provided with threads for connecting with the bottle body 31, a partition plate 3211 for dividing the inner cavity of the top cover into two parts is arranged in the top cover 321, and a hole is formed in the center of the partition plate 3211; the partition plate divides the inner cavity of the top cover 321 into a first space and a second space, and for convenience of illustration, when the top cover is used in a normal experiment, the space above is referred to as the first space, and the space below is referred to as the second space.

The magnetic stirring structure comprises a hard shaft 331, a magnetic stirrer 333, a flexible shaft 332 connected between the hard shaft 331 and the magnetic stirrer 333, and a fixture block 334, wherein the hard shaft 331 is arranged in the hole of the partition plate 3211, and one end of the hard shaft is connected with the fixture block 334; the clamping block and the flexible shaft are respectively arranged on two sides of the partition board. The diameter of one end of the hard shaft 331 is smaller than the diameter of the hole and the diameter of the other end of the hard shaft is larger than the diameter of the hole, so that the hard shaft can completely slide out of the hole to touch the bottom of the bottle body when the magnetic stirrer is stored, and the bottle body is protected.

For the convenience of the processing setting of hard axle, hard axle 331 includes first hard axle and the hard axle of second of being connected with first hard axle, and the diameter of first hard axle is less than the hard axle of second, and the diameter of the hard axle of second is greater than the diameter in hole, and the diameter of first hard axle is less than the diameter in hole, and first hard axle one end is connected with the fixture block, and the one end and the flexible axle of the hard axle of second are connected. Preferably, the length of the second hard shaft is less than the distance from the partition plate to the end part of the top cover.

In order to realize the sealing, the magnetic stirrer is further protected, the magnetic stirrer further comprises a cover body 322 which is in threaded connection with the end part of the top cover, and the outer walls of the two ends of the top cover 321 are provided with threads which are used for being connected with the cover body 321.

In order to protect the magnet and prevent the magnet from separating from the screw, a limit structure 26 is arranged at one end of the screw 23, and the magnet 25 is arranged between the limit structure 26 and the rotating shaft 22.

By adopting the structure, in normal use, as shown in fig. 1, the first space is on the second space, the clamping block is arranged in the first space, and the second bottle cap is closed at the end part of the first space. When the flexible shaft magnetic stirring bottle needs to be moved, the second bottle cap is detached from the first bottle cap, and then the first bottle cap is taken down from the bottle body to take out the magnetic stirrer. The first bottle cap is changed in one direction, the flexible shaft and the magnetic stirrer are accommodated in the second space under the first space, the diameter of one end of the hard shaft is smaller than that of the hole, the other end of the hard shaft is larger than the straight part of the hole, at the moment, the hard shaft moves downwards but cannot be completely separated from the hole under the action of the dead weight of the hard shaft and the fixture block, the distance from the position of the point where the diameter of the hard shaft is equal to that of the hole to the connecting end of the hard shaft and the length from the connecting end of the hard shaft to the end part of the top cover are smaller than the distance from the partition board to the end part of the top cover, and at the moment, the highest point of the hard shaft is lower than the end part of the second space. With the top cap second space end revolve on the bottle, again with the second bottle lid screw in the tip in second space can, realize accomodating protection magnetic stirrers when removing the magnetic stirrers, avoid striking the bottle.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.

Claims

1. The utility model provides a magnetic stirrer, includes the operation panel, arranges in magnetic stirring bottle, drive arrangement on the operation panel and be used for fixing magnetic stirring bottle's clamping structure, its characterized in that:

the operating platform comprises a first operating platform (11) for placing the magnetic stirring bottle, a second operating platform (12) placed in the first operating platform and a rotating disc (13) placed on the second operating platform (12);

the driving device comprises a first driving motor (21), a rotating shaft (22) connected to the first driving motor (21), a screw rod (23), a second driving motor (24) used for driving the screw rod (23) to rotate and a square magnet (25) connected to the screw rod (23) through a thread structure; the second driving motor (24) is fixed on the rotary disc (13), the rotating shaft (22) is connected to the axis of the rotary disc (13), a hole is formed in the rotating shaft (22), and the screw rod (23) penetrates through the hole; the magnet (25) is arranged on the rotating disc (13).

2. A magnetic stirrer as claimed in claim 1, wherein: the magnetic stirring bottle comprises a bottle body (31), a top cover arranged on the bottle body (31) and a magnetic stirring structure arranged on the bottle cover,

the top cover (321) is in a cylindrical shape with two open ends, threads for connecting with the bottle body (31) are arranged on the inner walls of the two ends, a partition plate (3211) for dividing the inner cavity of the top cover into two parts is arranged in the top cover (321), and a hole is formed in the center of the partition plate (3211);

the magnetic stirring structure comprises a hard shaft (331), a magnetic stirrer (333), a flexible shaft (332) connected between the hard shaft (331) and the magnetic stirrer (333), and a fixture block (334), wherein the hard shaft (331) is arranged in a hole of the partition plate (3211), and one end of the hard shaft is connected with the fixture block (334); the hard shaft (331) has one end diameter smaller than the diameter of the hole and the other end larger than the diameter of the hole.

3. A magnetic stirrer according to claim 2, wherein: hard axle (331) include first hard axle and the second hard axle of being connected with first hard axle, the diameter of first hard axle is less than the second hard axle, and the diameter of second hard axle is greater than the diameter in hole, and the diameter of first hard axle is less than the diameter in hole, and first hard axle one end is connected with the fixture block, and the one end and the flexible axle of second hard axle are connected.

4. A magnetic stirrer according to claim 2, wherein: the novel anti-theft cover is characterized by further comprising a cover body (322) used for being in threaded connection with the end portion of the top cover, and threads used for being connected with the cover body (321) are arranged on the outer walls of the two ends of the top cover (321).

5. A magnetic stirrer according to claim 2, wherein: one end of the screw rod (23) is provided with a limiting structure (26), and the magnet (25) is arranged between the limiting structure (26) and the rotating shaft (22).