CN207745814U - A kind of magnetic stirring apparatus - Google Patents

Abstract

The utility model discloses a magnetic stirrer, which relates to chemical experiment equipment and is used for solving the problem that a round bottom flask is easily toppled when placed on a common magnetic stirrer. The utility model comprises a shell, an induction plate fixed on the shell, and an induction The magnetic rotor used in conjunction with the disk, the control button arranged on the casing, and the clamping device arranged on the casing, the clamping device includes a column fixed on the casing, and a column that can be lifted and lowered on the column through a collar. The cross arm, the fixed clip fixed on the end of the cross arm away from the column, the movable clip slidably connected to the fixed clip through the adjustment component, and a clamping port for clamping the round bottom flask is formed between the fixed clip and the movable clip; The utility model has the following advantages and effects: This scheme utilizes a new mechanical structure, the fixed clip and the movable clip can hold the bottleneck of the round bottom flask, so that the flask is not easy to fall after being placed on the induction plate, so that the magnetic rotor can hold the flask The solution in it was stirred.

Description

a magnetic stirrer

technical field

The utility model relates to chemical experiment equipment, in particular to a magnetic stirrer.

Background technique

Magnetic stirrer is a kind of experimental equipment for liquid mixing, mainly used for stirring or heating and stirring low viscosity liquid or solid-liquid mixture. Drive the magnetic stirring bar placed in the container to make a circular motion, so as to achieve the purpose of stirring the liquid.

At present, the authorized announcement number is CN206152739U, and the Chinese utility model whose authorized announcement date is 2017.05.10 discloses a magnetic stirrer, including a base, a magnetic rotor, an iron frame and a wire. A collar that moves up and down, one side of the collar is provided with bolts, the collar is connected to one end of the cross arm, and the other end of the cross arm is equipped with a stirring rod, and the stirring rod is vertically facing downwards to the The center of the electromagnet, the lower end of the stirring rod is provided with a rotating shaft, the rotating shaft can rotate in the horizontal direction, a number of blades are evenly distributed on the edge of the rotating shaft, and the lower end of the rotating shaft is provided with a groove corresponding to the magnetic rotor , the surface of the groove is provided with a clamped cover, and the stirring rod, the blade and the rotating shaft are all made of rubber.

For the above-mentioned magnetic stirrer, when in use, place the container containing the liquid to be stirred on the base (this embodiment is called an induction plate), then insert the stirring rod into the container, turn on the power, and set the temperature to the required value , and then turn on the switch of the electromagnet, the electromagnet will generate a magnetic field after being energized, and the electromagnet will drive the magnetic rotor installed on the stirring rod to rotate during the rotation process, stirring the liquid in the container, but this magnetic force During the use of the stirrer, it was found that the beaker or Erlenmeyer flask can be placed on the base more stably because the bottom is flat, but the experiment sometimes needs to be carried out with a round-bottomed flask, because the bottom of the round-bottomed flask is arc-shaped, When placed on the base, it is easy to fall without external support, so this kind of mixer cannot be used for stirring.

Utility model content

The purpose of this utility model is to provide a magnetic stirrer, which can limit the dumping of the round-bottom flask, so that the round-bottom flask can be placed on the induction plate stably, so that the stirrer can also stir the solution in the round-bottom flask.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a magnetic stirrer, including a shell, an induction plate fixed on the shell, a The magnetic rotor, the control button arranged on the housing, also includes a clamping device arranged on the housing and used to limit the round-bottomed flask from falling, and the clamping device is fixed on the housing and located The column on one side of the induction plate, the horizontal arm that can be lifted and lowered on the vertical column through the collar, the fixed clip fixed on the end of the horizontal arm away from the vertical column, and the fixed clip that is slidably connected to the fixed clip through the adjustment assembly A movable clamp, a clamping port for clamping a round bottom flask is formed between the fixed clamp and the movable clamp, and the adjustment assembly includes an adjustment threaded hole opened on the end face of the fixed clamp away from the column 1. An adjusting screw screw threaded in the adjusting threaded hole, one end of the adjusting screw passing through the adjusting threaded hole is rotatably connected to the movable clip, and the fixed clip is also provided with a device for limiting the The limiting component for the rotation of the movable clip. .

By adopting the above scheme, the column is used to provide support for the cross arm, and the clamping port formed between the fixed clamp and the movable clamp can be used to clamp the bottleneck of the round bottom flask; when the solution contained in the round bottom flask needs to be When stirring, first adjust the clamping mouth to become larger through the adjustment assembly, so that the bottleneck of the round bottom flask can be placed in the clamping opening, and then reversely adjust the adjustment assembly so that the movable clamp and the fixed clamp hold the round bottom flask, After the flask is clamped, put the magnetic rotor into the round bottom flask, start the control button on the shell, the induction plate will generate a rotating magnetic field, and the rotating magnetic field will drive the magnetic rotor to rotate, stirring the solution in the flask, and then set the clamp After holding the device, the round-bottom flask can be limited, so that the round-bottom flask is not easy to dump, so as to achieve the purpose of stirring the solution in the round-bottom flask; Make the adjusting screw move toward the side away from the column, and during the movement of the adjusting screw, drive the movable clip to move toward the side away from the column, thereby causing the clamping opening formed between the movable clip and the fixed clip to become larger; when it is necessary to adjust When the clamping opening becomes smaller, reversely turn the adjusting screw, so that the adjusting screw drives the movable clamp to move towards the side close to the column, thereby causing the clamping opening to become smaller, thereby achieving the purpose of adjusting the size of the clamping opening.

The utility model is further configured as follows: the side walls of the fixed clip and the movable clip located in the clamping mouth are inwardly recessed to form an arc groove for the neck of the round-bottomed flask to embed.

By adopting the above scheme, since the cross-section of the neck of the round bottom flask is circular, after the circular arc grooves are arranged on the fixed clip and the movable clip, the circular arc groove can be used in the process of clamping the round bottom flask by the fixed clip and the movable clip. It has a higher fit with the side wall of the neck of the round bottom flask, and the existence of the arc groove can also restrict the neck of the flask from coming out of the clamping mouth, so as to achieve the purpose of improving the clamping firmness.

The utility model is further configured as follows: elastic pads are fixed on the side walls of the fixed clip and the movable clip located in the arc groove.

By adopting the above scheme, due to the high brittleness of the glass, it is very easy to break when the bottleneck of the round bottom flask is subjected to excessive clamping force, and after the elastic pad is installed, the elastic pad can be placed between the fixed clamp or the movable clamp and the flask. Deformation occurs when contact occurs. While buffering the contact between the clamping device and the flask, it can also increase the friction between the fixed clamp or movable clamp and the flask, so that the flask is not easily broken. It is also not easy to slip with the clamping device.

A further configuration of the present invention is that: the induction plate is also provided with a restriction ring, and the center of the restriction ring is formed with an arc-shaped slot for the bottom of the round-bottomed flask to embed.

By adopting the above-mentioned scheme, after setting the restricting ring, the slot on the restricting ring can be embedded in the bottom of the round-bottomed flask, and after the bottom of the flask is embedded in the slot, the restricting ring will form a limit on the bottom of the round-bottomed flask, At this time, the restricting ring, the fixed clip, and the movable clip all form a limit to the bottom and bottleneck of the flask, and the two-point restricting method can have a better fixing effect on the flask, so that the flask is more difficult to topple over.

The utility model is further set as follows: the limiting assembly includes a limiting block fixed on the side wall of the fixing clip located in the clamping opening and whose length direction is parallel to the length direction of the adjusting screw, and set on the The limiting groove on the side wall of the movable clip and adjacent to the adjusting screw rod, the limiting block is embedded in the limiting groove.

By adopting the above scheme, since the limit block is fixed on the fixed clip and embedded in the limit groove on the movable clip, the limit block can limit the gap between the movable clip and the fixed clip when it approaches or moves away from the column. The relative rotation makes it difficult for the arc groove on the fixed clip to misalign with the arc groove on the movable clip, thereby achieving the purpose of increasing the fixing speed of the round bottom flask.

The utility model is further set as: the cross arm is also provided with a temperature clip for installing the temperature detection rod, and the temperature clip includes a temperature clamp that is rotatably connected to the cross arm and is located between the fixing clip and the column. The connecting rod between them, the elastic clamping head fixed on the end of the connecting rod away from the cross arm and located above the fixing clip, the end surface of the elastic clamping head facing away from the fixing clip has a through hole There is a mounting hole, and the side wall of the elastic clamping head away from the column is also provided with a mounting groove communicating with the mounting hole.

By adopting the above scheme, the elastic clamping head can be used to clamp the temperature detection rod, so that the temperature detection rod is not easy to dump when the temperature of the solution in the round bottom flask is detected, and the elastic clamping head can also be used for temperature detection. The detection rod provides support, so that the magnetic rotor located at the bottom of the round bottom flask is not easy to collide with the temperature detection rod during rotation, so that both the magnetic rotor and the temperature detection rod can work normally.

The utility model is further set as: on the elastic clamping head and at the edge of the installation groove, there is also an arc inversion for facilitating the temperature detection rod to be embedded into the installation hole along the cavity formed by the installation groove. horn.

By adopting the above scheme, the existence of the arc chamfer can facilitate the operator to install the temperature detection rod into the installation hole with the help of the arc chamfer during the installation of the temperature detection rod. When installing the temperature detection rod, place the temperature detection rod In the installation groove, and against the side wall of the arc chamfer, then press the temperature detection rod towards the side embedded in the installation hole, at this time, the elastic clamping head will be separated to both sides under the push of the extrusion force , so that the opening of the installation groove becomes larger, and then the temperature detection rod slides into the installation hole along the side wall of the installation groove under the push of the pressing force. After the temperature detection rod is embedded in the installation hole, the elastic clamping head will Reset under the action of elastic potential energy, clamp the temperature detection rod, so as to achieve the purpose of fixing the temperature detection rod.

In summary, the utility model has the following beneficial effects:

1. The fixed clip and the movable clip can hold the bottleneck of the round bottom flask, so that the flask is not easy to fall after being placed on the induction plate, so that the magnetic rotor can stir the solution in the flask;

2. The confining ring can form a support at the bottom of the round-bottom flask, and together with the fixed clip and the movable clip, restrict the round-bottom flask, so that the round-bottom flask is less likely to be dumped, so as to achieve the purpose of improving the stability of the round-bottom flask;

3. The elastic clamping head can be used to clamp the temperature detection rod and play a supporting role for the temperature detection rod, so that the magnetic rotor is not easy to collide with the temperature detection rod during the rotation process, so that the magnetic rotor and the temperature detection rod The sticks are working fine.

Description of drawings

Fig. 1 is the overall structural diagram of the present embodiment;

Fig. 2 is an exploded view of the present embodiment;

Fig. 3 is a partial enlarged view at position A in Fig. 2 .

In the figure: 1. Shell; 11. Electromagnet; 12. Electromagnetic coil; 2. Induction plate; 3. Magnetic rotor; 4. Control button; 5. Clamping device; 51. Column; Connecting hole; 53, fixed clip; 531, clamping space; 54, movable clip; 6, collar; 61, fixed threaded hole; 62, fixed bolt; 7, adjustment assembly; 71, adjustment threaded hole; 72, adjustment screw ;8, clamping mouth; 9, arc groove; 10, elastic pad; 20, limit component; 201, limit block; 202, limit groove; 21, temperature clamp; 211, connecting rod; 212, elastic clamp 22, connecting column; 23, limit nut; 24, mounting hole; 25, mounting groove; 26, arc chamfering; 27, restricting ring;

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 and 2, a magnetic stirrer includes a housing 1, an induction disc 2, a magnetic rotor 3, a control button 4, and a clamping device 5. The housing 1 is made of corrosion-resistant PEEK material. The housing 1 is respectively provided with an electromagnet 11 and an electromagnetic coil 12 driven by a motor to rotate, the electromagnet 11 is used to generate a magnetic field, and the electromagnetic coil 12 is used to heat the solution to be stirred; the induction plate 2 is made of a metal material and is fixedly installed On the housing 1, it is located directly above the electromagnet 11 and the electromagnetic coil 12; the magnetic rotor 3 is made of magnetic metal; there are two control buttons 4, which are installed on the side wall of the housing 1 which is inclined , one of the control buttons 4 is used to adjust the heating temperature of the electromagnetic coil 12, and the other is used to adjust the rotation speed of the electromagnet 11.

When in use, first place the container containing the solution on the induction plate 2, then put the magnetic rotor 3 into the container, start the power supply, the electromagnet 11 generates a magnetic field, and rotates under the drive of the motor, and the electromagnet 11 rotates. During the process, the rotating magnetic field causes the magnetic rotor 3 to rotate, and then the rotation of the magnetic rotor 3 drives the solution to rotate, thereby achieving the purpose of stirring.

The clamping device 5 includes a column 51, a cross arm 52, a fixed clamp 53, and a movable clamp 54. The column 51 is vertically fixed on the housing 1 and is located on one side of the induction plate 2; the cross arm 52 can be lifted by the collar 6 It is arranged on the column 51, and the length direction of the cross arm 52 is perpendicular to the length direction of the column 51. On the side wall of the cross arm 52 and at the position in the middle, there is a through connecting hole 521 vertically; the collar 6 is in the shape of a ring , sleeved on the column 51, on the side wall of the collar 6, a fixed threaded hole 61 communicating with the inner cavity of the collar 6 is provided, and a fixed bolt 62 is threaded in the fixed threaded hole 61, and the fixed bolt 62 passes through the One end of the fixing threaded hole 61 is pressed against the side wall of the column 51 , thereby fixing the collar 6 on the column 51 .

As shown in Figure 2 and Figure 3, the fixing clip 53 is in the shape of "匚", and the fixing clip 53 is fixed on the end of the cross arm 52 away from the collar 6, and the part of the fixing clip 53 used to connect with the cross arm 52 is a fixing clip 53 is adjacent to the side wall of its own opening, and the clamping space 531 for the neck of the round bottom flask to pass through is formed inside the fixed clip 53 in the shape of a "匚"; the movable clip 54 is slidably connected by the adjustment assembly 7 On the movable clip 54; the adjustment assembly 7 includes an adjustment threaded hole 71 and an adjustment screw 72. The adjustment threaded hole 71 is set on the side wall of the fixed clip 53 facing away from the cross arm 52, and communicates with the clamping space 531; the adjustment The screw rod 72 is threadedly connected in the adjustment threaded hole 71, and the movable clamp 54 is rotatably connected to one end of the adjusting screw rod 72 located in the clamping space 531. At this time, a gap for clamping the round bottom flask is formed between the movable clamp 54 and the fixed clamp 53. The clamping mouth 8, and the movable clamp 54 and the fixed clamp 53 are positioned at the sidewall in the clamping mouth 8 and are recessed inward to form an arc groove 9 for the bottleneck of the round bottom flask to embed; in the movable clamp 54 and the fixed clamp 53 Elastic pads 10 made of rubber material are fixed on the side walls located in the arc groove 9 .

The fixed clip 53 is also provided with a limit assembly 20 for limiting the rotation of the movable clip 54. The limit assembly 20 includes a limit block 201 and a limit groove 202. The limit block 201 is integrally arranged on the fixed clip 53 and is located In the space 531 and on the side wall away from the opening side of itself, and the length direction of the limit block 201 is parallel to the length direction of the adjustment screw 72; the limit groove 202 is set on the side wall of the side wall of the movable clip 54 close to the limit block 201 , and the limit block 201 is embedded in the limit groove 202. At this time, when the adjusting screw 72 drives the movable clamp 54 to move toward the side close to or away from the column 51, the limit block 201 can limit the movable clamp 54 to produce Rotate, so that the arc groove 9 on the movable clip 54 is not easy to misalign with the arc groove 9 on the fixed clip 53 .

The temperature clamp 21 for clamping the temperature detection rod is also provided on the cross arm 52. The temperature clamp 21 includes a connecting rod 211 and an elastic clamping head 212. The connecting rod 211 is in an "L" shape. A connecting post 22 with a diameter smaller than that of the connecting rod 211 is integrated, the diameter of the connecting post 22 is equal to the diameter of the connecting hole 521 on the cross arm 52, and the connecting post 22 is penetrated in the connecting hole 521; One end of the connecting hole 521 is also threaded with the limit nut 23, so that the connecting column 22 is fixed on the cross arm 52; Directly above; on the end surface of the elastic clamping head 212 facing away from the fixed clip 53, there is a through installation hole 24 vertically, and the center line of the installation hole 24 is always located between the circular arc groove 9 on the movable clip 54 and the fixed clip 53. Within the enclosed space; on the end face of the elastic clamping head 212 facing away from the connecting rod 211, there is a mounting groove 25 communicating with the mounting hole 24; An arc chamfer 26 is provided on the edge of the mounting groove 25 for facilitating the insertion of the temperature detection rod into the mounting hole 24 .

When installing the temperature detection rod, first place the temperature detection rod in the installation groove 25, and make the side wall of the temperature detection rod interfere with the side wall of the elastic clamping head 212 located at the arc chamfer 26, and then forcefully detect the temperature. The rod is pressed toward the side embedded in the mounting hole 24, and at this time, the elastic clamping head 212 will be separated to both sides under the action of the pushing force, so that the opening of the mounting groove 25 becomes larger, and the temperature detection rod is completely embedded in the mounting hole 24 Finally, the elastic clamping head 212 will automatically reset under the action of its own elastic potential energy to clamp the temperature detection rod, thereby achieving the purpose of fixing the temperature detection rod.

As shown in FIG. 1 , a cylindrical confining ring 27 is also provided on the induction disc 2 , and the center of the confining ring 27 is provided with an embedded groove 271 for the arc-shaped bottom of the round-bottomed flask to be embedded and to penetrate the confining ring 27 , The embedding groove 271 is in the shape of an arc matching the bottom of the round-bottomed flask; a ring-shaped non-slip pad 272 made of rubber material is also fixed on the bottom of the restricting ring 27 .

The specific implementation process: when it is necessary to stir the solution contained in the round bottom flask, firstly make the bottom of the round bottom flask embed in the embedded groove 271 on the restricting ring 27, then rotate the adjusting screw 72 to move the movable clamp 54 away from One side of the collar 6 is adjusted so that the clamping mouth 8 between the movable clamp 54 and the fixed clamp 53 is larger than the diameter of the neck of the round bottom flask, and then the neck of the round bottom flask is put into the clamping mouth 8, and the fixed clamp 53 is embedded In the arc groove 9 on the top; then reversely rotate the adjusting screw 72 to adjust the movable clamp 54 towards the side close to the collar 6, so that the movable clamp 54 and the fixed clamp 53 clamp the round bottom flask, and adjust the movable clamp 54 During the process, you need to gently shake the neck of the round bottom flask by hand. When you feel that the clamping is stable, stop rotating the adjusting screw 72 to prevent the flask from being crushed by excessive extrusion force; then install the temperature detection rod in sequence according to the conventional operation. and the magnetic rotor 3, the solution in the flask can be stirred after the power is turned on; after the clamping device 5 and the restricting ring 27 are set, the inclination of the round bottom flask on the induction plate 2 can be restricted, thereby making the magnetic force The stirrer can stir the solution in the round bottom flask.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (7)

1. A magnetic stirrer, comprising a housing (1), an induction disc (2) fixed on the housing (1), a magnetic rotor for being placed in a container and cooperating with the induction disc (2) (3), the control button (4) arranged on the housing (1), is characterized in that: it also includes a clamping device (5) which is arranged on the housing (1) and is used to limit the round bottom flask from falling ), the clamping device (5) includes a column (51) fixed on the housing (1) and located on one side of the induction disc (2), which can be lifted and arranged on the column ( The cross arm (52) on 51), the fixing clip (53) fixed on the end of the cross arm (52) away from the column (51), is slidably connected to the fixing clip ( 53) on the movable clamp (54), between the fixed clamp (53) and the movable clamp (54) is formed with a clamping port (8) for clamping the round bottom flask, and the adjustment assembly (7) includes a set The adjustment threaded hole (71) on the end face of the fixed clip away from the side of the column (51), is threadedly connected to the adjustment screw (72) in the adjustment threaded hole (71), and the adjustment screw (72 ) through the adjusting threaded hole (71) is rotatably connected to the movable clip (54), and a limiter for restricting the rotation of the movable clip (54) is also provided on the fixed clip (53). bit component (20). 2. A magnetic stirrer according to claim 1, characterized in that: the side walls of the fixed clip (53) and movable clip (54) located in the clamping opening (8) are inwardly recessed to form useful The arc groove (9) embedded in the neck of the round bottom flask. 3. A magnetic stirrer according to claim 2, characterized in that: the side walls of the fixed clip (53) and the movable clip (54) located in the arc groove (9) are fixed with elastic Pads (10). 4. A magnetic stirrer according to claim 1, characterized in that: said induction plate (2) is also provided with a confining ring (27), and the center of said confining ring (27) is formed with a circle for feeding The bottom of the bottom flask is embedded in an arc-shaped slot (271). 5. A magnetic stirrer according to claim 1, characterized in that: the limiting assembly (20) includes a side wall fixed to the fixing clip (53) located in the clamping opening (8) The limit block (201) on the top and whose length direction is parallel to the length direction of the adjustment screw (72), the limit block (201) set on the side wall of the movable clip (54) and adjacent to the adjustment screw (72) A positioning groove (202), the limiting block (201) is embedded in the limiting groove (202). 6. A magnetic stirrer according to claim 1, characterized in that: the cross arm (52) is also provided with a temperature clamp (21) for installing a temperature detection rod, and the temperature clamp (21) It includes a connecting rod (211) that is rotatably connected to the cross arm (52) and is located between the fixing clip (53) and the upright post (51), and is fixed on the connecting rod (211) away from the cross arm ( 52) and an elastic clamping head (212) located above the fixed clip (53), the end surface of the elastic clamped head (212) facing away from the fixed clip (53) is provided with a through The mounting hole (24), and the side wall of the elastic clamping head (212) away from the column (51) is also provided with a mounting groove (25) communicating with the mounting hole (24). 7. A magnetic stirrer according to claim 6, characterized in that: on the elastic clamping head (212) and at the edge of the installation groove (25), there is a hole for the convenience of the temperature detection rod along the The cavity formed by the installation groove (25) is embedded into the circular arc chamfer (26) in the installation hole (24).