CN209901184U - Constant temperature magnetic stirrers - Google Patents
Constant temperature magnetic stirrers Download PDFInfo
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- CN209901184U CN209901184U CN201920390914.1U CN201920390914U CN209901184U CN 209901184 U CN209901184 U CN 209901184U CN 201920390914 U CN201920390914 U CN 201920390914U CN 209901184 U CN209901184 U CN 209901184U
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Abstract
The utility model discloses a constant temperature magnetic stirrers, including casing and electric heater unit, transversely be provided with the baffle in the casing, the baffle separates the casing for upper chamber and inclosed cavity down, heater unit sets up in the upper chamber, is provided with the fixing base in the upper chamber, fixing base and baffle fixed connection, be provided with fixed sleeve on the fixing base, seted up water inlet through-hole on fixed sleeve's the sleeve wall, all seted up two screw thread through-holes on the pore wall of a plurality of mounting holes, the screw thread through-hole is connected with the screw rod, the screw rod tip is provided with the fixed block, the fixed block sets up in fixed sleeve; a magnetic stirring mechanism is arranged in the lower cavity. The utility model discloses a magnetic stirrers makes the assay in the container be heated evenly through water bath heating, and the too high condition of local temperature can not appear taking place, and can fix the container of different diameters through the fixed sleeve, and application scope is wide, and fixed mode is fixed for through rubber flexibility, the indestructible container.
Description
Technical Field
The utility model relates to a medical agitated vessel technical field particularly, relates to a constant temperature magnetic stirrers.
Background
The operation principle of the magnetic stirrer is that a micromotor drives a high-temperature resistant powerful magnet to rotate to generate a rotating magnetic field to drive a stirrer in a container to rotate so as to achieve the aim of stirring liquid in the container.
In addition, the traditional stirrer is only provided with a heating tray on the base, so that the sample in the beaker is heated unevenly in the heating process, the heating temperature can change, and meanwhile, the traditional heating mode can cause the phenomenon that the local temperature is too high and the temperature of other parts is low.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model aims at providing a constant temperature magnetic stirrers makes the assay in the container be heated evenly through water bath heating, and local high temperature's the condition can not appear and takes place, and can fix the container of different diameters through the fixed sleeve, and application scope is wide, and fixed mode is for passing through rubber flexible fixed, the not fragile container.
In order to achieve the above object, the utility model adopts the following technical scheme: a constant-temperature magnetic stirrer comprises a shell and an electric heating device, wherein a partition plate is transversely arranged in the shell and divides the shell into an upper cavity and a closed lower cavity, the electric heating device is arranged in the upper cavity, a fixed seat is arranged in the upper cavity and fixedly connected with the partition plate, a fixed sleeve is arranged on the fixed seat, a plurality of installation holes with gradually reduced diameters are sequentially arranged in the fixed sleeve from top to bottom, the installation holes are sequentially communicated, a water inlet through hole is formed in the sleeve wall of the fixed sleeve, two thread through holes are formed in the hole walls of the installation holes, the two thread through holes are oppositely arranged, a screw is connected with the thread through holes, a fixed block is arranged at the end part of the screw, and the fixed block is arranged in the fixed sleeve;
and a magnetic stirring mechanism is arranged in the lower cavity and corresponds to the fixed seat.
The magnetic stirring mechanism is composed of four coils which are symmetrically distributed on the circumference, each coil is fixed by a magnetic conduction column, the axis of each coil is parallel to and perpendicular to the bottom of the upper cavity, the upper surface of each coil is provided with symmetrical magnetic pole pieces, the longitudinal axes of the corresponding magnetic pole pieces are horizontally intersected, and the intersection point of the longitudinal axes of the corresponding magnetic pole pieces corresponds to a container in the upper cavity. The lower cavity body is also internally provided with a circuit board which is provided with a controller which is respectively corresponding to the magnetic stirring mechanism and consists of a driving module consisting of a singlechip and a double H-bridge driving circuit. For the magnetic stirring mechanism, each PWM output end of the single chip of the controller is connected to the control input end of the double H-bridge driving circuit corresponding to the driving module, and the control output ends of the double H-bridge driving circuit are correspondingly connected to the four coils of the magnetic stirring mechanism. The I/O port of the singlechip is connected with a PWM square wave width adjusting potentiometer, and the potentiometer is provided with a stirring speed adjusting knob positioned on the outer surface of the lower cavity.
The electric heating device is an electric heating device in the existing similar equipment, and the electric heating device is electrically connected with an external power supply.
And rubber is fixedly arranged on the contact surface of the fixed block and the container.
The working principle is as follows: when liquid stirring needs to be carried out, the container is firstly fixed in the upper cavity through the fixing sleeve, and the fixing mode is as follows: from the top down a plurality of diameters grow gradually the mounting hole, its fixed station that forms the echelonment, the lateral wall of mounting hole is fixed and is provided with rubber, places the container bottom on the fixed station, and the lateral wall of container is fixed by rubber, and the rethread is twisted the adjustable fixed telescopic elasticity of screw rod to guarantee fixed effect. The diameters of the mounting holes are sequentially increased, so that the mounting holes can correspond to containers with different diameters, and the mounting holes are wide in application range.
After the container is fixed, water is added into the upper cavity, the electric heating device is started, and the water in the upper cavity is heated through the electric heating device, so that a constant-temperature heating environment is provided for the container. And then, starting the magnetic stirring mechanism to stir, wherein after the magnetic stirring mechanism is started, the magnetic stirrer in the container rotates at a constant speed under the action of the rotating magnetic field, and then the liquid in the container is stirred.
The utility model discloses a magnetic stirrers makes the assay in the container be heated evenly through water bath heating, and the too high condition of local temperature can not appear taking place, and can fix the container of different diameters through the fixed sleeve, and application scope is wide, and fixed mode is fixed for through rubber flexibility, the indestructible container.
Preferably, the upper cavity is connected with an automatic water replenishing mechanism, the automatic water replenishing mechanism comprises a sleeve, a connecting column and a buoyancy rod, a connecting through hole is formed in the upper portion of the side wall of the upper cavity, the sleeve is horizontally and fixedly connected in the connecting through hole, the connecting column is connected in the sleeve in a sliding mode, a first water replenishing hole is formed in one end of the connecting column along the axial direction, a second water replenishing hole is formed in the side wall of the connecting column along the radial direction, the first water replenishing hole is communicated with the sleeve, and the second water replenishing hole is communicated with the first water replenishing hole; the end face of the other end of the connecting column is an inclined face, a sliding groove is formed in the end face, a sliding block connected with the sliding groove in a sliding mode is arranged at the top end of the buoyancy rod, and a floating ball is fixedly connected to the bottom end of the buoyancy rod; the upper cavity side wall is fixedly connected with a plurality of fixing rods along the vertical direction, the fixing rods are provided with fixing rings, and the buoyancy rods are slidably sleeved in the fixing rings.
One end of the sleeve is arranged in the upper cavity, and the other end of the sleeve is communicated with an external water source.
And the dynamic seal is a reciprocating dynamic seal between the sleeve and the connecting column.
The fixed rod and the fixed ring are arranged to ensure that the movement track of the buoyancy rod is vertical all the time.
When the water level in the upper cavity body meets the use requirement, the second water replenishing hole is arranged in the sleeve.
The floating ball is arranged on the water surface in the upper cavity. A large amount of evaporation can appear when the temperature is too high in the internal water of epicoele, and when the water yield descends, the floater descends along with the decline of liquid level, and the buoyancy pole descends in step this moment, and the slider on the buoyancy pole descends in step, and the slider slides along the spout simultaneously, and the spliced pole moves to the right under the effect of slider this moment, and when the spliced pole moved to second moisturizing hole roll-off sleeve pipe, the water in the sleeve pipe was gone into in the cavity by first moisturizing hole through second moisturizing hole. The liquid level in the upper cavity rises along with the liquid level, the floating ball rises along with the rise of the liquid level, the buoyancy rods rise synchronously, the sliding blocks on the buoyancy rods rise synchronously, the connecting column moves leftwards under the action of the sliding blocks at the moment, and when the connecting column moves to the second water replenishing hole and slides into the sleeve again, the automatic water replenishing mechanism does not replenish water in the upward cavity.
Preferably, the fixing seat is of a circular ring structure. The fixing base is of an annular structure, so that the interference of the fixing base on a rotating magnetic field can be reduced, and the stirring effect is ensured.
Preferably, the fixing seat is provided with an internal thread, the fixing sleeve is provided with an external thread, and the fixing sleeve is in threaded connection with the fixing seat. The fixing base and the fixing sleeve are in threaded connection, so that the container can be conveniently fixed on the fixing base after the container is fixed outside the upper cavity body, and meanwhile, the fixing base is in threaded connection, simple in structure, convenient and practical.
Preferably, go up cavity top and be provided with the heat preservation lid, the lateral wall fixedly connected with lantern ring of casing, sliding connection has the stand in the lantern ring, the top fixed connection of stand is in the edge of heat preservation lid, the cover is equipped with the extension spring on the stand, the both ends of extension spring respectively with casing and stand fixed connection. When the stirring is carried out under the water bath condition, the upper cavity is sealed through the heat-insulating cover, so that the water evaporation is reduced, and a good heat-insulating effect is achieved.
The utility model has the advantages that:
(1) the utility model discloses a magnetic stirrers makes the assay in the container be heated evenly through water bath heating, and the too high condition of local temperature can not appear taking place, and can fix the container of different diameters through the fixed sleeve, and application scope is wide, and fixed mode is fixed for through rubber flexibility, the indestructible container.
(2) Automatic water replenishing is carried out in the upper cavity through the automatic water replenishing mechanism, so that the water level in the upper cavity is constant, the condition that empty burning occurs in the upper cavity due to the reduction of the water level is effectively prevented, the damage of an instrument and the occurrence of safety accidents are avoided, and the automatic water replenishing mechanism is simple in structure and low in cost.
(3) The fixing base and the fixing sleeve are in threaded connection, so that the container can be conveniently fixed on the fixing base after the container is fixed outside the upper cavity body, and meanwhile, the fixing base is in threaded connection, simple in structure, convenient and practical.
(4) Go up the cavity top and be provided with the heat preservation lid, the lateral wall fixedly connected with lantern ring of casing, sliding connection has the stand in the lantern ring, the top fixed connection of stand is in the edge of heat preservation lid, the cover is equipped with the extension spring on the stand, the both ends of extension spring respectively with casing and stand fixed connection. When the stirring is carried out under the water bath condition, the upper cavity is sealed through the heat-insulating cover, so that the water evaporation is reduced, and a good heat-insulating effect is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of a constant temperature magnetic stirrer according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a fixing sleeve in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a fixing base in embodiment 1 of the present invention;
FIG. 4 is a schematic view of the overall structure of the constant temperature magnetic stirrer in embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a sleeve in embodiment 2 of the present invention;
fig. 6 is a schematic structural view of a slider in embodiment 2 of the present invention.
Description of reference numerals:
1. a housing; 2. an electric heating device; 3. a partition plate; 4. a fixed seat; 5. fixing the sleeve; 6. mounting holes; 7. a water inlet through hole; 8. a threaded through hole; 9. a screw; 10. a fixed block; 11. a magnetic stirring mechanism; 12. An automatic water replenishing mechanism; 13. a sleeve; 14. connecting columns; 15. a buoyant rod; 16. a first water replenishing hole; 17. A second water replenishing hole; 18. a chute; 19. a slider; 20. a floating ball; 21. fixing the rod; 22. a fixing ring; 23. A heat preservation cover; 24. a collar; 25. a column; 26. a tension spring; 27. a container.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-3, a constant temperature magnetic stirrer comprises a housing 1 and an electric heating device 2, a partition plate 3 is transversely arranged in the housing 1, the partition plate 3 divides the housing 1 into an upper cavity and a closed lower cavity, the electric heating device 2 is arranged in the upper cavity, a fixing seat 4 is arranged in the upper cavity, the fixing seat 4 is fixedly connected with the partition plate 3, a fixing sleeve 5 is arranged on the fixing seat 4, a plurality of mounting holes 6 with gradually reduced diameters are sequentially arranged in the fixing sleeve 5 from top to bottom, the mounting holes 6 are sequentially communicated, a water inlet through hole 7 is arranged on the sleeve wall of the fixing sleeve 5, two thread through holes 8 are arranged on the hole walls of the mounting holes 6, the two thread through holes 8 are oppositely arranged, the thread through holes 8 are connected with a screw rod 9, a fixed block 10 is arranged at the end part of the screw rod 9, and the fixed block 10 is arranged in the fixed sleeve 5;
and a magnetic stirring mechanism 11 is arranged in the lower cavity, and the magnetic stirring mechanism 11 corresponds to the fixed seat 4.
The magnetic stirring mechanism 11 is composed of four coils which are symmetrically distributed on the circumference, each coil is fixed by a magnetic conductive column, the axis of each coil is parallel to and vertical to the bottom of the upper cavity, the upper surface of each coil is provided with symmetrical magnetic pole pieces, the longitudinal axes of the corresponding magnetic pole pieces are horizontally intersected, and the intersection point of the longitudinal axes of the corresponding magnetic pole pieces corresponds to the container 27 in the upper cavity. And a circuit board is also arranged in the lower cavity body, and the circuit board is provided with a controller which is respectively corresponding to the magnetic stirring mechanism 11 and consists of a driving module consisting of a single chip microcomputer and a double H-bridge driving circuit. For the magnetic stirring mechanism 11, each PWM output terminal of the single chip of the controller is connected to the control input terminal of the double H-bridge driving circuit corresponding to the driving module, and the control output terminals of the double H-bridge driving circuit are correspondingly connected to the four coils of the magnetic stirring mechanism 11. The I/O port of the singlechip is connected with a PWM square wave width adjusting potentiometer, and the potentiometer is provided with a stirring speed adjusting knob positioned on the outer surface of the lower cavity.
The electric heating device 2 is an electric heating device in the existing similar equipment, and the electric heating device 2 is electrically connected with an external power supply.
Rubber is fixedly arranged on the contact surface of the fixed block 10 and the container 27.
As shown in fig. 1, it is provided with heat preservation lid 23 to go up the cavity top, the lateral wall fixedly connected with lantern ring 24 of casing 1, sliding connection has stand 25 in the lantern ring 24, the top fixed connection of stand 25 is in the edge of heat preservation lid 23, the cover is equipped with extension spring 26 on the stand 25, the both ends of extension spring 26 respectively with casing 1 and stand 25 fixed connection. When the stirring is carried out under the water bath condition, the upper cavity is sealed through the heat-insulating cover 23, so that the water evaporation is reduced, and a good heat-insulating effect is achieved.
The fixed seat 4 is of a circular ring structure. The fixing seat 4 is of an annular structure, so that the interference of the fixing seat to a rotating magnetic field can be reduced, and the stirring effect is ensured.
As shown in fig. 3, an internal thread is provided on the fixing seat 4, an external thread is provided on the fixing sleeve 5, and the fixing sleeve 5 is in threaded connection with the fixing seat 4. Fixing base 4 and fixed sleeve 5 pass through threaded connection, conveniently fix container 27 on fixing base 4 again after going up the cavity external fixation container 27, and threaded connection simultaneously, simple structure, convenient and practical.
The working principle is as follows: when liquid stirring is required, the container 27 is firstly fixed in the upper cavity through the fixing sleeve 5, and the fixing mode is as follows: from top to bottom a plurality of diameter grow in proper order's mounting hole 6, its fixed station that forms the echelonment, the fixed rubber that is provided with of lateral wall of mounting hole 6 places container 27 bottom on the fixed station, and container 27's lateral wall is fixed by rubber, and the rethread is screwed the elasticity that the adjustable fixed sleeve 5 of screw rod 9 to guarantee fixed effect. Since the diameters of the plurality of mounting holes 6 are sequentially increased, the container 27 can be adapted to containers 27 having different diameters, and the application range is wide.
After the container 27 is fixed, water is added into the upper cavity, the electric heating device 2 is started, and the water in the upper cavity is heated through the electric heating device 2, so that a constant-temperature heating environment is provided for the container 27. Then the magnetic stirring mechanism 11 is started to stir, and after the magnetic stirring mechanism 11 is started, the magnetic stirrer in the container 27 rotates at a uniform speed under the action of the rotating magnetic field, so as to stir the liquid in the container 27
The utility model discloses a magnetic stirrers makes the assay in the container be heated evenly through water bath heating, and the too high condition of local temperature can not appear taking place, and can fix the container of different diameters through the fixed sleeve, and application scope is wide, and fixed mode is fixed for through rubber flexibility, the indestructible container.
Example 2:
as shown in fig. 4 to 6, in this embodiment, on the basis of embodiment 1, the upper cavity is connected to an automatic water replenishing mechanism 12, the automatic water replenishing mechanism 12 includes a sleeve 13, a connecting column 14 and a buoyancy rod 15, a connecting through hole is formed in an upper portion of a side wall of the upper cavity, the sleeve 13 is horizontally and fixedly connected in the connecting through hole, the connecting column 14 is slidably connected in the sleeve 13, a first water replenishing hole 16 is formed in one end of the connecting column 14 along an axial direction, a second water replenishing hole 17 is formed in a side wall of the connecting column 14 along a radial direction, the first water replenishing hole 16 is communicated with the sleeve 13, and the second water replenishing hole 17 is communicated with the first water replenishing hole 16; the end face of the other end of the connecting column 14 is an inclined face, a sliding groove 18 is formed in the end face, a sliding block 19 connected with the sliding groove 18 in a sliding mode is arranged at the top end of the buoyancy rod 15, and a floating ball 20 is fixedly connected to the bottom end of the buoyancy rod 15; go up the inside wall of cavity and follow many dead levers 21 of vertical direction fixedly connected with, be provided with solid fixed ring 22 on the dead lever 21, buoyancy pole 15 slip cover is established gu fixed ring 22 is interior.
One end of the sleeve 13 is arranged in the upper cavity, and the other end of the sleeve is communicated with an external water source.
And a dynamic seal is arranged between the sleeve 13 and the connecting column 14, and the dynamic seal is a reciprocating dynamic seal.
The fixing rod 21 and the fixing ring 22 are provided to ensure that the movement track of the buoyancy rod 15 is always vertical.
When the water level in the upper cavity meets the use requirement, the second water replenishing hole 17 is arranged in the sleeve 13.
The floating ball 20 is arranged on the water surface in the upper cavity. A large amount of evaporation can appear when the temperature of water in the epicoele is too high, when the water yield descends, floater 20 descends along with the decline of liquid level, buoyancy rod 15 descends in step this moment, slider 19 on the buoyancy rod 15 descends in step, slider 19 slides along spout 18 simultaneously, spliced pole 14 moves to the right under slider 19's effect this moment, when spliced pole 14 moves to second moisturizing hole 17 roll-off sleeve pipe 13, the water in sleeve pipe 13 is by first moisturizing hole 16 through second moisturizing hole 17 inflow epicoele internal. The liquid level in the upper cavity rises along with the rise of the liquid level, the floating ball 20 rises along with the rise of the liquid level, the buoyancy rod 15 rises synchronously, the sliding block 19 on the buoyancy rod 15 rises synchronously, at the moment, the connecting column 14 moves leftwards under the action of the sliding block 19, and when the connecting column 14 moves to the second water replenishing hole 17 and slides into the sleeve 13 again, the automatic water replenishing mechanism 12 does not replenish water in the upper cavity.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (5)
1. A constant temperature magnetic stirrer comprises a shell and an electric heating device, and is characterized in that a clapboard is transversely arranged in the shell, the clapboard divides the shell into an upper cavity and a closed lower cavity, the electric heating device is arranged in the upper cavity, a fixed seat is arranged in the upper cavity and is fixedly connected with the clapboard, a fixed sleeve is arranged on the fixed seat, a plurality of mounting holes with gradually reduced diameters are sequentially arranged in the fixed sleeve from top to bottom and are sequentially communicated, the sleeve wall of the fixed sleeve is provided with a water inlet through hole, the wall of each mounting hole is provided with two threaded through holes which are oppositely arranged, the threaded through hole is connected with a screw, a fixed block is arranged at the end part of the screw, and the fixed block is arranged in the fixed sleeve;
and a magnetic stirring mechanism is arranged in the lower cavity and corresponds to the fixed seat.
2. The constant-temperature magnetic stirrer according to claim 1, wherein the upper cavity is connected with an automatic water replenishing mechanism, the automatic water replenishing mechanism comprises a sleeve, a connecting column and a buoyancy rod, a connecting through hole is formed in the upper portion of the side wall of the upper cavity, the sleeve is horizontally and fixedly connected in the connecting through hole, the connecting column is slidably connected in the sleeve, a first water replenishing hole is formed in one end of the connecting column along the axial direction, a second water replenishing hole is formed in the side wall of the connecting column along the radial direction, the first water replenishing hole is communicated with the sleeve, and the second water replenishing hole is communicated with the first water replenishing hole; the end face of the other end of the connecting column is an inclined face, a sliding groove is formed in the end face, a sliding block connected with the sliding groove in a sliding mode is arranged at the top end of the buoyancy rod, and a floating ball is fixedly connected to the bottom end of the buoyancy rod; the upper cavity side wall is fixedly connected with a plurality of fixing rods along the vertical direction, the fixing rods are provided with fixing rings, and the buoyancy rods are slidably sleeved in the fixing rings.
3. The thermostatic magnetic stirrer of claim 1, wherein the permanent seat is a circular ring structure.
4. The thermostatic magnetic stirrer according to claim 3, wherein the fixing base is provided with an internal thread, the fixing sleeve is provided with an external thread, and the fixing sleeve is in threaded connection with the fixing base.
5. The constant-temperature magnetic stirrer according to claim 1, wherein a heat preservation cover is arranged at the top of the upper cavity, a lantern ring is fixedly connected to the outer side wall of the shell, a stand column is connected to the lantern ring in a sliding mode, the top of the stand column is fixedly connected to the edge of the heat preservation cover, a tension spring is sleeved on the stand column, and two ends of the tension spring are fixedly connected with the shell and the stand column respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920390914.1U CN209901184U (en) | 2019-03-26 | 2019-03-26 | Constant temperature magnetic stirrers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920390914.1U CN209901184U (en) | 2019-03-26 | 2019-03-26 | Constant temperature magnetic stirrers |
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| Publication Number | Publication Date |
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| CN209901184U true CN209901184U (en) | 2020-01-07 |
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| CN201920390914.1U Active CN209901184U (en) | 2019-03-26 | 2019-03-26 | Constant temperature magnetic stirrers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112426999A (en) * | 2020-12-10 | 2021-03-02 | 昆明理工大学 | Constant-temperature reaction container and constant-temperature method |
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2019
- 2019-03-26 CN CN201920390914.1U patent/CN209901184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112426999A (en) * | 2020-12-10 | 2021-03-02 | 昆明理工大学 | Constant-temperature reaction container and constant-temperature method |
| CN112426999B (en) * | 2020-12-10 | 2023-10-27 | 昆明理工大学 | Constant temperature reaction container and constant temperature method |
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