Desktop type magnetic stirring device

Abstract

The utility model provides a desktop type magnetic stirring device which comprises a shell, a lower protection disc, a round heating disc, a heating sheet, a metal pressing plate and a stirrer, the lower protection disc is arranged on the shell, the heating sheet is arranged between the round heating disc and the metal pressing plate, the circumference and the middle of the round heating disc and the metal pressing plate are fixed through a plurality of screws, and the stirrer is arranged in the shell. The periphery of the bottom of the round heating disc is in threaded connection with a plurality of T-shaped bolts, the lower sections of the T-shaped bolts penetrate through the lower protection disc, the sections, located below the lower protection disc, of the T-shaped bolts are sleeved with floating springs, and the stirrer is arranged in the shell. The circumference and the middle of the metal pressing plate and the circular heating disc are fixed through the multiple screws, and the problem that the middle of the circular heating disc deforms due to heating can be remarkably solved. Meanwhile, the four suspended and locked pressing feet on the periphery can ensure that the heating plate is tightly attached to the round heating disc, good heat transfer is achieved, and screw looseness caused by thermal expansion and cold contraction of the round heating disc is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic force stirring technical field, concretely is a desktop formula magnetic force stirring device. BACKGROUND

[0002] The heating magnetic force stirrer is driven by magnet magnetic force to stir the stirrer and heats the heating disc, and the speed of stirring and the temperature of heating are controlled by controlling the motor heating disc current size. It has the functions of heating and stirring, and can complete various experimental requirements.

[0003] The existing magnetic force stirrer has the following problems: in the heating process of the heating sheet, the middle of the top circular heating disc is deformed due to heat accumulation, and the fixing bolts around the circular heating disc are loose due to thermal expansion and contraction. UTILITY MODEL CONTENTS

[0004] (I) technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a desktop formula magnetic force stirring device, which solves the problems raised in the above background technology.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the utility model realizes the following technical scheme: a desktop formula magnetic force stirring device, comprising a shell, a lower protection disc, a circular heating disc, a heating sheet, a metal pressing plate and a stirrer, the lower protection disc is arranged on the shell, the heating sheet is arranged between the circular heating disc and the metal pressing plate, the circular heating disc and the metal pressing plate are fixed by a plurality of screws at the circumference and the middle, a plurality of T-shaped bolts are threadedly connected around the bottom of the circular heating disc, the lower section of the T-shaped bolt penetrates through the lower protection disc, a floating spring is sleeved on the section of the T-shaped bolt below the lower protection disc, and the stirrer is arranged in the shell.

[0008] Preferably, a plurality of pressing feet are arranged around the metal pressing plate, the screws are connected with the circular heating disc through the pressing feet, and the pressing feet and the circular heating disc are in a suspended locking state.

[0009] Preferably, heat preservation cotton and a heat insulation layer are arranged between the heating sheet and the metal pressing plate, and the lead-out wire of the heating sheet is vertically led out of the heat preservation cotton.

[0010] Preferably, an intermediate heat insulation plate is arranged at the top of the inner cavity of the lower protection disc.

[0011] Preferably, the stirrer comprises a motor mica heat insulation plate, a magnet seat and a motor, the motor mica heat insulation plate is fixed on the lower protection disc, the motor is fixed on the motor mica heat insulation plate and used to drive the magnet seat to rotate, and the magnet is eccentrically arranged on the magnet seat.

[0012] Preferably, the bottom of the magnet seat is provided with fan blades, and a through hole penetrating up and down is formed in the magnet seat.

[0013] Preferably, the bottom of the motor mica heat insulation plate is provided with a magnetic shielding plate.

[0014] (Three) beneficial effects

[0015] The utility model provides a desktop formula magnetic stirring device. Have following beneficial effect:

[0016] 1, this desktop formula magnetic stirring device, through in the metal pressing plate and the circumference and the middle of round heating disc adopt many screw fixed, can significantly reduce the problem of the middle of round heating disc because of heating deformation. The four overhanging locking feet of the periphery can ensure that the heating sheet and the round heating disc are closely attached, good heat transfer is achieved, and the screw loosening caused by the thermal expansion and contraction of the round heating disc is effectively reduced.

[0017] 2, this desktop formula magnetic stirring device, round heating disc is locked by T-shaped bolt and floating spring floating tension, first, under the tension of the floating spring, the attachment of the heating sheet and the round heating disc is further ensured, and higher heat transfer efficiency is ensured. Second, the locking torque of the T-shaped bolt does not need to be very large, when the round heating disc produces thermal deformation in the heating process, the round heating disc will have certain deformation, through the floating spring, the deformation of the lower protection disc can be effectively avoided. Third, the level of the round heating disc can be fine adjusted by adjusting the different torque of the T-shaped bolt. Fourth, the round heating disc is locked by four screws and four T-shaped bolts around, and the attachment surface of the heating sheet and the round heating disc is more closely.

[0018] 3, this desktop formula magnetic stirring device, through the bottom of the magnet seat is provided with fan blade, when the motor is high speed rotation, the wind force produced by the fan blade can rapidly discharge the heat generated in the lower protection disc through the gap of the shell, and the heat accumulation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a half cutaway axonometric view of the utility model;

[0020] Figure 2 It is an external axonometric view of the utility model;

[0021] Figure 3 It is a schematic view of the bottom of the lower protection disc of the utility model;

[0022] Figure 4 It is a connection diagram of the metal pressing plate and the round heating disc of the utility model.

[0023] In the figure: 1 shell, 2 lower protective disc, 3 round heating disc, 4 heating sheet, 5 heat insulation cotton, 6 heat insulation layer, 7 metal pressing plate, 8 pressing foot, 9 screw, 10 T-shaped bolt, 11 floating spring, 12 middle heat insulation plate, 13 lead-out wire, 14 motor mica heat insulation plate, 15 magnet base, 16 motor, 17 magnet, 18 magnetic separation plate, 19 fan blade. DETAILED DESCRIPTION

[0024] The embodiment of the utility model provides a desktop formula magnetic force stirring device, as Figures 1-4 Shown, including shell 1, lower protective disc 2, round heating disc 3, heating sheet 4, metal pressing plate 7, agitator.

[0025] Lower protective disc 2 sets up on shell 1, and lower protective disc 2 is fixed with shell 1 through four screws, and has certain gap simultaneously.

[0026] Heating sheet 4 sets up between round heating disc 3 and metal pressing plate 7, and round heating disc 3 is at the most top, and round heating disc 3 and metal pressing plate 7 are fixed with multiple screws 9 in circumference and middle. Screw 9 has certain locking force, when heating sheet 4 is in the heating process, the middle of round heating disc 3 will occur middle deformation because of heat collection, adopts the middle screw 9 locking, can significantly reduce the heating deformation problem of round heating disc 3.

[0027] As Figure 4 Shown, the four around of metal pressing plate 7 are provided with four pressing feet 8, and four pressing feet 8 are arranged in ring direction equal angle, and screw 9 is connected with round heating disc 3 through pressing foot 8, and pressing foot 8 and round heating disc 3 are in the state of suspended locking. Can ensure that heating sheet 4 and round heating disc 3 closely fit, play good heat transfer, and because pressing foot 8 is suspended, screw 9 has pre-tightening force, effectively reduces the loosening of screw 9 due to the thermal expansion and contraction of round heating disc.

[0028] As Figure 1 Shown, the bottom of round heating disc 3 is threadedly connected with several T-shaped bolts 10 around, and the lower section of T-shaped bolt 10 passes through lower protective disc 2, and the section of T-shaped bolt 10 passing through lower protective disc 2 is not in contact with lower protective disc 2. The section of T-shaped bolt 10 below lower protective disc 2 is sleeved with floating spring 11. Its role has the following points: first, further ensure the fit of heating sheet 4 and round heating disc 3 under the tension of floating spring 11, ensure higher heat transfer efficiency. Second, the locking torque of T-shaped bolt 10 does not need to be very large, when round heating disc 3 generates thermal deformation in the heating process, round heating disc 3 will have certain deformation, through floating spring 11, the deformation of lower protective disc 2 can be effectively avoided. Third, the level of round heating disc 3 can be fine-tuned by adjusting the torque of T-shaped bolt 10. Fourth, the four around of round heating disc 2 have 4 screws 9 and four T-shaped bolts 10 locking, and the fit surface of heating sheet 4 and round heating disc 3 is more closely.

[0029] A heat insulation cotton 5 and a heat insulation layer 6 are arranged between the heating sheet 4 and the metal pressing plate 7, the heat insulation cotton 5 is thin, and the heat insulation layer 6 is relatively thick. The lead-out wire 13 of the heating sheet 4 is vertically led out of the heat insulation cotton 5. By pasting a thin heat insulation cotton 5 under the heating sheet 4, the heat insulation layer 6 can be tightly attached to the heating sheet 4, and the lead-out wire 13 of the heating sheet 4 is under the heat insulation cotton 5, so that the insulation sheath of the lead-out wire 13 is effectively prevented from aging due to long-time contact with the heating sheet 4.

[0030] An intermediate heat insulation plate 12 is arranged at the top of the inner cavity of the lower protection disc 2. The intermediate heat insulation plate 12 further insulates the heat generated by the upper circular heating disc 3.

[0031] A stirrer is arranged in the shell 1.

[0032] As shown in Figure 1 and Figure 3 , the stirrer comprises a motor mica heat insulation plate 14, a magnet seat 15 and a motor 16. The motor mica heat insulation plate 14 is fixed on the lower protection disc 2 by four screws, and the motor mica heat insulation plate 14 can further reduce the influence of heat on the motor 16.

[0033] The motor 16 is fixed on the motor mica heat insulation plate 14 and is used to drive the magnet seat 15 to rotate. The magnet seat 15 is eccentrically provided with a magnet 17. When the motor 16 rotates at high speed, the magnet 17 on the magnet seat 15 drives the stirring rod in the container to rotate at high speed, thereby playing a role of stirring the solution in the container.

[0034] As shown in Figure 3 , the bottom of the magnet seat 15 is provided with fan blades 19, and the magnet seat 15 is provided with through holes penetrating up and down. The bottom of the shell 1 is provided with ventilation gaps. When the motor 16 rotates at high speed, the wind power generated by the fan blades 19 can quickly discharge the heat generated in the lower protection disc 2 through the gaps of the shell 1, thereby reducing the heat accumulation.

[0035] The bottom of the motor mica heat insulation plate 14 is provided with a magnetic shielding plate 18. The magnetic shielding plate 18 is arranged between the motor 16 and the motor mica heat insulation plate 14, and the area of the magnetic shielding plate 18 completely covers the magnet seat 15 and the magnet 17. By arranging the magnetic shielding plate 18, the motor 16 can be effectively fixed, and the installation strength of the motor 16 is increased. The magnet 17 on the magnet seat 15 can also avoid magnetic field interference on the permanent magnet in the motor 16.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A table type magnetic stirring device comprising a housing (1), a lower guard disc (2), a circular heating disc (3), a heating sheet (4), a metal pressing plate (7), a stirrer, characterized in that: The lower protection disc (2) is arranged on the shell (1), the heating sheet (4) is arranged between the circular heating disc (3) and the metal pressing plate (7), the circular heating disc (3) and the metal pressing plate (7) are fixed by a plurality of screws (9) at the circumference and the middle, a plurality of T-shaped bolts (10) are threadedly connected around the bottom of the circular heating disc (3), the lower section of the T-shaped bolt (10) penetrates the lower protection disc (2), a floating spring (11) is sleeved on the section of the T-shaped bolt (10) below the lower protection disc (2), and the stirrer is arranged in the shell (1).

2. A magnetic desktop stirrer as claimed in claim 1, wherein: A plurality of pressing feet (8) are arranged around the metal pressing plate (7), the screw (9) is connected with the circular heating disc (3) through the pressing foot (8), and the pressing foot (8) and the circular heating disc (3) are in a suspended locking state.

3. A magnetic desktop stirrer as claimed in claim 1, wherein: The heat preservation cotton (5) and the heat insulation layer (6) are arranged between the heating sheet (4) and the metal pressing plate (7), and the outgoing lead (13) of the heating sheet (4) is vertically led out of the heat preservation cotton (5).

4. A magnetic desktop stirrer as claimed in claim 1, wherein: An intermediate heat insulation plate (12) is arranged at the top of the inner cavity of the lower protection disc (2).

5. A magnetic desktop stirrer as claimed in claim 1, wherein: The stirrer comprises a motor mica heat insulation plate (14), a magnet base (15) and a motor (16), the motor mica heat insulation plate (14) is fixed on the lower protection disc (2), the motor (16) is fixed on the motor mica heat insulation plate (14) and is used for driving the magnet base (15) to rotate, and the magnet base (15) is eccentrically provided with a magnet (17).

6. A table top magnetic stirring device as claimed in claim 5, wherein: A fan blade (19) is arranged at the bottom of the magnet base (15), and a through hole is formed in the magnet base (15) and penetrates the magnet base (15) from top to bottom.

7. A table top magnetic stirring device as claimed in claim 5, wherein: A magnetic shielding plate (18) is arranged at the bottom of the motor mica heat insulation plate (14).

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