CN210964931U

CN210964931U - Reagent dripping sample system of magnetic stirrer

Info

Publication number: CN210964931U
Application number: CN201921868196.0U
Authority: CN
Inventors: 潘艳琴; 孙燕
Original assignee: Nanjing Kangpeng Testing Technology Co ltd
Current assignee: Nanjing Kangpeng Testing Technology Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-07-10
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a reagent sample dripping system of a magnetic stirrer, which comprises a main body, a beaker and a magnetic stirrer, and further comprises a burette, a support column arranged on the main body, a lifting block sliding along the axial direction of the support column, a support frame and a T-shaped rotating shaft arranged on the side wall of the support frame, wherein the two ends of the support frame are relatively provided with a locking component used for clamping the burette, the side wall of the support column is provided with a lifting groove along the axial direction thereof, the lifting groove is internally provided with a lifting component driving the lifting block to slide along the axial direction thereof, the side wall of the lifting block is provided with a rotating groove for rotating the T-shaped rotating shaft, and the T-shaped rotating shaft is provided with a positioning component connected with the lifting block; this dripping appearance system replaces the handheld buret of manpower to carry out the dropwise add reagent, avoids the volume of adding of reagent to have the deviation, has improved detection precision and detection efficiency.

Description

Reagent dripping sample system of magnetic stirrer

Technical Field

The utility model relates to a magnetic stirrers's technical field, in particular to magnetic stirrers's reagent drips appearance system.

Background

The magnetic stirrer is a laboratory instrument for liquid mixing, which is used for stirring or simultaneously heating and stirring liquid or solid-liquid mixture with low viscosity, and the basic principle is that the magnetic stirrer placed in a container is pushed by a magnetic field to perform circumferential operation by utilizing the principle that like poles repel and opposite poles attract of the magnetic field, so that the aim of stirring the liquid is fulfilled.

The traditional Chinese patent with the publication number of CN209005657U discloses a magnetic stirrer, which comprises a main body, wherein a tray is detachably connected to the main body, a connecting mechanism for connecting the tray and the main body is arranged on the tray, a plurality of inserting holes with axes along the thickness direction of the tray are formed in the tray, the tray comprises an inner surface abutting against the main body and an outer surface far away from the main body, and a limiting rod is inserted into each inserting hole; through setting up the gag lever post for beaker on the magnetic stirrers keeps stable.

However, the above technical solutions have the following disadvantages: when the experiment, need hand the dropping sample pipe through the experimenter, to dropwise add reagent in the beaker, and the experimenter when dropwise add reagent, the skew takes place for the dropping sample pipe easily, has influenced the reading, leads to there being the deviation in the addition of reagent, finally influences the experimental result.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a magnetic stirrers's reagent drips appearance system, its advantage: in the stirring process, the reagent is stably added in the stirring tank instead of manpower, so that the deviation of the adding amount of the reagent is avoided, and the detection precision and the detection efficiency are improved.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a magnetic stirrers's reagent drips appearance system, includes main part, beaker and magnetic stirrers, still includes the buret, sets up support post in the main part, along the elevator, bearing frame that the support post axial slided and set up the T type pivot on the bearing frame lateral wall, the both ends of bearing frame are equipped with the locking Assembly who is used for centre gripping buret relatively, the lateral wall of support post is equipped with the lift groove along its axial, be equipped with the lifting unit who drives the elevator and slide along its axial in the lift groove, the lateral wall of elevator is equipped with and supplies T type pivot pivoted rotating groove, it links to each other with the elevator to be equipped with locating component in the T type pivot.

Through the technical scheme, the bearing frame is firstly rotated to be in a horizontal state; secondly, the T-shaped rotating shaft is fixed by the locking assembly, so that the bearing frame can be fixed; then, the burette is stably fixed by the locking assembly, so that the burette is prevented from inclining, and the stability of the reagent dripping process is ensured; finally, the lifting assembly is used for driving the lifting block to lift, the burette is adjusted to a proper height, the phenomenon that the height is too high, liquid splashes when the reagent is dripped into the beaker, the detection result is influenced, and the stability of reagent dripping samples is improved; the sample dripping system formed by adopting the structure can accurately and quantitatively drip the reagent, avoids the deviation of the adding amount of the reagent and improves the detection precision and the detection efficiency.

The utility model discloses further set up to: locking Assembly is including being the first piece and the second piece that the type set up, being the first clamp and the second clamp that arc set up, first piece and second piece set up two relative settings respectively at the lateral wall both ends of bearing frame, first clamp and second clamp set up respectively on the parallel end relative lateral wall of two first pieces, two second pieces, one of them all be equipped with flexible groove on two parallel end lateral walls of first piece and second piece, flexible inslot is equipped with the flexible subassembly of the laminating of first clamp of drive and second clamp on the buret outer wall respectively, and is adjacent all reserve the centre gripping space that has fixed buret between the relative lateral wall of first clamp, second clamp.

According to the technical scheme, firstly, the burette is placed in the clamping space, so that the side wall of the burette is respectively attached to the side wall of the first clamp or the second clamp on one side; then, the first clamp or the second clamp on the other side can be respectively attached to the outer walls of the two burettes by utilizing the elastic telescopic assembly, so that the burettes are fixed; the flexible groove sets up respectively on the lateral wall of one of them first piece and second piece for the first clamp and the second clamp of one side are fixed, and the first clamp and the activity of second clamp of opposite side are flexible, so that to buret vertical location, avoid producing the slope, lead to the addition of reagent to have the deviation, have improved detection accuracy.

The utility model discloses further set up to: the radian of first clamp is greater than the radian of second clamp.

Through above-mentioned technical scheme, the radian of second clamp is less than the radian of first clamp, can be used to the buret of the different dimensions of centre gripping, and application scope is wide.

The utility model discloses further set up to: the flexible subassembly is including setting up at flexible inslot and rather than the flexible piece of axial syntropy, setting at the slider of flexible piece one end and fixing the spring on the slider lateral wall, the cell wall in flexible groove is equipped with the spout that supplies the slider to slide along its axial, the one end that the slider was kept away from to flexible piece links to each other with the lateral wall of first clamp, second clamp respectively, the flexible direction of spring and the axial syntropy of flexible piece, the one end that the slider was kept away from to the spring is fixed on the cell wall that flexible groove notch was kept away from to the spout.

According to the technical scheme, the burette is placed in the clamping space, so that one side wall of the burette is attached to the side wall of the first clamp or the second clamp on one side respectively; then, the elastic force of the spring is utilized to drive the sliding block to slide in the sliding groove, and further the telescopic block slides in the telescopic groove, so that the first clamp or the second clamp at the other side is driven to abut against and attach to the outer wall of the burette, and the burette is fixed; this flexible mode, easy operation to personnel's quick, accurate dismouting buret has improved detection efficiency.

The utility model discloses further set up to: the lifting assembly comprises a handle and a screw rod rotatably arranged in the lifting groove, the screw rod is in threaded fit with the lifting block, the bottom end of the screw rod is rotatably connected with the groove wall of the lifting groove, and the top end of the screw rod extends out of the top wall of the support column and is connected with the handle.

Through above-mentioned technical scheme, twist grip, the lead screw rotates, because the lift groove plays limiting displacement to the removal of elevator, and then the elevator slides along the length direction of lead screw, has realized the altitude mixture control to the bearing frame to the distance between adjustment buret and the beaker is avoided reagent to splash everywhere, has improved the stability of reagent dropping appearance process.

The utility model discloses further set up to: locating component including set up threaded rod between T type pivot and bearing frame lateral wall, with threaded rod screw-thread fit's nut, slip the cover establish the holding ring on the threaded rod and the double-phase reference column of setting on the holding ring end wall relatively, the lateral wall of elevator be equipped with reference column matched with constant head tank, the nut supports tightly on the end wall that the holding ring deviates from the reference column.

Through the technical scheme, after the bearing frame is adjusted to be in a horizontal state, the positioning ring slides towards the direction of the lifting block, so that the positioning column is inserted into the positioning groove, then the nut is rotated to be tightly abutted against the end wall of the positioning ring, which is far away from the positioning column, and the positioning column can be fixed in the positioning groove; because the holding ring slides and establishes on the threaded rod, the reference column sets up on the holding ring relatively, plays limiting displacement to the rotation of threaded rod, and then fixes a position T type pivot to realized fixed to the bearing frame, improved the stability of reagent dripping appearance process.

The utility model discloses further set up to: the inner ring wall of the positioning ring is provided with a limiting block, and the side wall of the threaded rod is provided with a limiting groove for the limiting block to slide along the axial direction of the threaded rod.

Through above-mentioned technical scheme, the cooperation of stopper and spacing groove plays direction and spacing effect to sliding of holding ring for the holding ring can be stabilized and slide on the threaded rod.

The utility model discloses further set up to: the lateral wall of first clamp, second clamp all is equipped with the outer wall laminating of rubber slipmat and buret.

Through above-mentioned technical scheme, the compactness of laminating between first clamp, second clamp and the buret outer wall has been strengthened in the setting of rubber slipmat, avoids the buret landing, has improved the stability fixed to the buret.

To sum up, the utility model discloses following beneficial effect has:

1. the burette is fixed through the locking assembly, so that the phenomenon that the burette is inclined to cause deviation of the adding amount of the reagent is avoided; the lifting assembly is used for driving the lifting block to lift, the burette is adjusted to a proper height, the phenomenon that the height is too high, liquid splashes when a reagent is dripped into the beaker, the detection result is influenced, and the detection precision and the detection efficiency are improved;

2. the elastic force of the spring is utilized to drive the sliding block to slide in the sliding groove, and then the telescopic block slides in the telescopic groove, so that the first clamp or the second clamp is abutted and attached to the outer wall of the burette, and the burette is fixed; the telescopic mode is simple to operate, so that a person can rapidly and accurately disassemble and assemble the burette, and the detection efficiency is improved;

3. the positioning ring slides towards the direction of the lifting block, so that the positioning column is inserted into the positioning groove, then the nut is rotated, so that the nut is tightly abutted against the end wall of the positioning ring, which is far away from the positioning column, and the positioning column can be fixed in the positioning groove; because the holding ring slides and establishes on the threaded rod, the reference column sets up on the holding ring relatively, plays limiting displacement to the rotation of threaded rod, and then fixes a position T type pivot to realized fixed to the bearing frame, improved the stability of reagent dripping appearance process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Figure 2 is a schematic structural view for showing the positional relationship between the locking assembly and the support frame.

Fig. 3 is a schematic partial top sectional structure view for showing the positional relationship between the lifting block and the support pillar.

Fig. 4 is a side sectional structural view for showing a positional relationship between the second branch block and the second yoke.

Fig. 5 is an enlarged schematic view of a portion a in fig. 3.

Reference numerals: 1. a main body; 2. a beaker; 3. a magnetic stirrer; 4. a burette; 5. supporting a column; 6. a lifting block; 7. a bearing frame; 8. a T-shaped rotating shaft; 9. a locking assembly; 91. a first support block; 92. a second branch block; 93. a first clamp; 94. a second clamp; 95. a clamping space; 10. a lifting groove; 11. a lifting assembly; 111. a screw rod; 112. a handle; 12. a rotating tank; 13. a positioning assembly; 131. a threaded rod; 132. a nut; 133. a positioning ring; 134. a positioning column; 135. positioning a groove; 14. a telescopic groove; 15. an elastic telescopic component; 151. a telescopic block; 152. a slider; 153. a spring; 154. a chute; 16. a limiting block; 17. a limiting groove; 18. a rubber non-slip mat.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a reagent dropping sample system of a magnetic stirrer is disclosed, referring to fig. 1, comprising a main body 1, a beaker 2 is placed on the main body 1, and a magnetic stirrer 3 is placed in the beaker 2, so as to stir the liquid in the beaker 2 under the action of a magnetic field.

Referring to fig. 1, a support column 5 is vertically and upwardly extended from one side of a beaker 2 on a main body 1, a lifting block 6 is slidably arranged on the side wall of the support column 5 along the axial direction of the support column, a rotary groove 12 (fig. 3) is arranged on the side wall of the lifting block 6, a T-shaped rotary shaft 8 (fig. 3) is rotatably arranged in the rotary groove 12 (fig. 3), the rotary groove 12 (fig. 3) is matched with the T-shaped rotary shaft 8 (fig. 3), the horizontal end of the T-shaped rotary shaft 8 (fig. 3) is arranged in the rotary groove 12 (fig. 3), the vertical end of the T-shaped rotary shaft 8 (fig. 3) is perpendicular to the axis of the support column 5, the vertical end of the T-shaped rotary shaft 8 (fig. 3) extends out of the rotary groove 12 and is fixedly connected with a support frame 7, the support frame 7 is horizontally arranged, two ends of the support frame 7 are provided with burettes 4, one burette 4 is arranged above the beaker 2, two ends of, a positioning component 13 is arranged on the T-shaped rotating shaft 8 (figure 3) and is connected with the lifting block 6;

during the experiment, firstly, the bearing frame 7 is rotated to be in a horizontal state; secondly, a T-shaped rotating shaft 8 (shown in figure 3) is fixed by a locking assembly 9, and the bearing frame 7 can be fixed; then the burette 4 is fixed by the locking component 9; finally, the lifting assembly 11 is used for driving the lifting block 6 to lift, the burette 4 is adjusted to a proper height, the overhigh height can be avoided, liquid splashing is caused when the reagent is dripped into the beaker 2, the detection result is influenced, and the stability of the reagent dripping sample is improved; the burette 4 is provided with scale marks (not shown in the figure), so that a person can conveniently observe the amount of the dripped reagent; when two different reagents need to be added into the beaker 2, the locking assembly 9 is utilized to fixedly store the two burettes 4, so that the device is convenient and practical; the sample dripping system formed by adopting the structure can accurately and quantitatively drip the reagent, avoids the deviation of the adding amount of the reagent and improves the detection precision and the detection efficiency.

Referring to fig. 1 and 2, the lifting assembly 11 includes a handle 112 located above the support pillar 5 and a screw 111 rotatably disposed in the lifting groove 10, the length direction of the screw 111 is the same as the height direction of the support pillar 5, the screw 111 is in threaded fit with the lifting block 6, the bottom end of the screw 111 is rotatably connected with the bottom wall of the lifting groove 10 adjacent to the notch thereof, and the top end of the screw 111 extends out of the top wall of the support pillar 5 and is connected with the handle 112; handle 112 is rotated, and lead screw 111 rotates, because lift groove 10 plays limiting displacement to the removal of lifter block 6, and then lifter block 6 slides along the length direction of lead screw 111, changes rotary motion into linear motion, has realized the altitude mixture control to bearing frame 7 to the distance between adjustment buret 4 and beaker 2 avoids reagent to splash everywhere, has improved the stability of reagent dropping appearance process.

Referring to fig. 2 and 4, the locking assembly 9 includes a first supporting block 91 and a second supporting block 92, which are respectively arranged on the side walls of the two ends of the supporting frame 7 in pairs, and a first clamp 93 and a second clamp 94 which are arranged in an arc shape; the novel burette comprises a first supporting block 91 and a second supporting block 92, wherein the first supporting block 91 and the second supporting block 92 are arranged in a mode of \20866, the openings of the first supporting block 91 and the second supporting block 92 face to the side away from a bearing frame 7, the number of the first clamping hoop 93 and the second clamping hoop 94 is four, the first clamping hoop 93 is respectively arranged on the opposite side walls of the free ends of the two first supporting blocks 91, the second clamping hoop 94 is respectively arranged on the opposite side walls of the free ends of the two second supporting blocks 92, the horizontal end side walls of one of the first supporting block 91 and the second supporting block 92 are respectively provided with a telescopic groove 14, a clamping space 95 for fixing the burette 4 is reserved between the opposite side walls of the 4 first clamping hoops 93 and the opposite side walls of the 4 second clamping hoops 94 in the telescopic groove 14, and the first clamping hoop 93 and the second clamping hoop 94 are attached to the outer wall of the bure;

when the burette 4 is installed, firstly, the burette 4 is placed into the clamping space 95, so that the side wall of the burette 4 is respectively attached to the side wall of the first clamp 93 or the second clamp 94 on one side; then, the first clamp 93 or the second clamp 94 on the other side can be respectively attached to the outer walls of the two burettes 4 by using the elastic telescopic assembly 15, so that the burettes 4 are fixed; the telescopic groove 14 is respectively arranged on the side wall of one of the first supporting block 91 and the second supporting block 92, so that the first clamp 93 and the second clamp 94 on one side are fixed, and the first clamp 93 and the second clamp 94 on the other side are movably telescopic, so that the burette 4 is vertically positioned, the inclination is avoided, the deviation of the adding amount of the reagent is caused, and the detection precision is improved.

Referring to fig. 2, the radian of the first clamp 93 is greater than that of the second clamp 94, so that the first clamp 93 can clamp the burette 4 with a larger diameter, and the second clamp 94 can clamp the burette 4 with a smaller diameter, which is wide in application range.

Referring to fig. 3 and 4, the side walls of the first clamp 93 and the second clamp 94 are provided with rubber anti-slip pads 18 and are attached to the outer wall of the burette 4; the rubber anti-slip mat 18 is arranged, so that the tightness of the fit between the first clamp 93 and the second clamp 94 and the outer wall of the burette 4 is enhanced, the burette 4 is prevented from sliding down, and the stability of fixing the burette 4 is improved.

Referring to fig. 2 and 4, the elastic expansion assembly 15 includes an expansion block 151 disposed in the expansion slot 14, a slider 152 disposed at one end of the expansion block 151, and a spring 153 fixed on a side wall of the slider 152, a length direction of the expansion block 151 is parallel to an axial direction of the expansion slot 14, a slot 154 for the slider 152 to slide is disposed on a slot wall of the expansion slot 14 along the axial direction, an expansion direction of the spring 153 is in the same direction as the axial direction of the expansion block 151, one end of the spring 153 is fixed on a side wall of the slider 152, the other end of the spring 153 is fixed on a slot wall of the slot 154 away from the slot opening of the expansion slot 14, one end of the expansion block 151 away from the slider 152 is respectively in threaded connection with a first clamp 93 and a second clamp 94, and a first clamp 93 and a second clamp 94 on the other side are respectively in threaded connection with side walls of the first support block 91 and the second support block 92, so as to facilitate the assembly and disassembly of the first, the application range is wide;

when the device is installed, the first clamp 93 or the second clamp 94 on one side is away from the first clamp 93 or the second clamp 94 on the other side, and the spring 153 is compressed; secondly, placing the burette 4 into the clamping space 95, so that one side wall of the burette 4 is respectively attached to the side wall of the first clamp 93 or the second clamp 94 on one side; then, the slide block 152 is driven to slide in the slide groove 154 by using the elastic force of the spring 153, and then the telescopic block 151 slides in the telescopic groove 14, so that the first clamp 93 or the second clamp 94 on the other side can be abutted against and attached to the outer wall of the burette 4, and the burette 4 is fixed; this flexible mode, easy operation to personnel's dismouting buret 4 quick, accurate has improved detection efficiency.

Referring to fig. 3 and 5, the positioning assembly 13 includes a threaded rod 131 disposed between the T-shaped rotating shaft 8 and the supporting frame 7, a nut 132 in threaded engagement with the threaded rod 131, a positioning ring 133 slidably fitted over the threaded rod 131, and two positioning posts 134 disposed opposite to end walls of the positioning ring 133, and the side wall of the lifting block 6 is provided with positioning grooves 135 engaged with the positioning posts 134; after the supporting frame 7 is adjusted to be in a horizontal state, the positioning ring 133 slides towards the direction of the lifting block 6, so that the positioning column 134 is inserted into the positioning groove 135, then the nut 132 is rotated, so that the nut 132 is tightly abutted against the end wall of the positioning ring 133, which is far away from the positioning column 134, and the positioning column 134 can be fixed in the positioning groove 135; because the locating ring 133 slides and covers on the threaded rod 131, and the positioning columns 134 are arranged to be two, the rotation of the threaded rod 131 is limited, and further the T-shaped rotating shaft 8 cannot rotate, the fixing of the bearing frame 7 is realized, and the stability of reagent dripping is improved.

Referring to fig. 5, the inner annular wall of the positioning ring 133 is provided with a stopper 16, and the side wall of the threaded rod 131 is provided with a stopper groove 17 along the axial direction thereof for the stopper 16 to slide; the cooperation of stopper 16 and spacing groove 17 plays direction and spacing effect to the slip of holding ring 133 for holding ring 133 can stably slide on threaded rod 131.

The working process is as follows: firstly, rotating the bearing frame 7 to a horizontal state; secondly, the positioning ring 133 is slid, so that the positioning column 134 is inserted into the positioning groove 135, the nut 132 is rotated, the nut 132 is tightly abutted against the end wall of the positioning ring 133, and the positioning column 134 can be fixed in the positioning groove 135, so that the support frame 7 is fixed; then, the burette 4 is placed in the clamping space 95, and the first clamp 93 or the second clamp 94 is tightly pressed against the outer wall of the burette 4 by utilizing the elastic force of the spring 153, so that the burette 4 is vertically fixed, and the addition amount of the reagent is prevented from being influenced; at last, the handle 112 is rotated, the screw rod 111 rotates, and then the lifting block 6 slides in the lifting groove 10, so that the burette 4 can be adjusted to a proper position, the height is prevented from being too high, liquid splashes around when the reagent is dripped, and the detection precision is improved.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a magnetic stirrers's reagent drips appearance system, includes main part (1), beaker (2) and magnetic stirrer (3), its characterized in that: still include buret (4), set up support post (5) on main part (1), along support post (5) axial elevator (6), bearing frame (7) and set up T type pivot (8) on bearing frame (7) lateral wall that slide, the both ends of bearing frame (7) are equipped with locking Assembly (9) that are used for centre gripping buret (4) relatively, the lateral wall of support post (5) is equipped with lift groove (10) along its axial, be equipped with in lift groove (10) and drive elevator (6) along its axial elevator assembly (11) that slide, the lateral wall of elevator (6) is equipped with supplies T type pivot (8) pivoted rotary groove (12), it links to each other with elevator (6) to be equipped with locating component (13) on T type pivot (8).

2. A magnetic stirrer reagent dripping system according to claim 1, wherein: the locking component (9) comprises a first supporting block (91) and a second supporting block (92) which are arranged in a shape of a \ "20866", and a first clamping hoop (93) and a second clamping hoop (94) which are arranged in an arc shape, the first supporting block (91) and the second supporting block (92) are respectively arranged at two ends of the side wall of the bearing frame (7) oppositely, the first clamp (93) and the second clamp (94) are respectively arranged on the parallel end opposite side walls of the two first supporting blocks (91) and the two second supporting blocks (92), the side walls of two parallel ends of one of the first supporting block (91) and the second supporting block (92) are provided with a telescopic groove (14), be equipped with first clamp of drive (93) and flexible subassembly (15) of second clamp (94) laminating on buret (4) outer wall in flexible groove (14) respectively, it is adjacent all reserve between the relative lateral wall of first clamp (93), second clamp (94) and have centre gripping space (95) of fixed buret (4).

3. A magnetic stirrer reagent dripping system according to claim 2, wherein: the radian of the first clamping hoop (93) is larger than that of the second clamping hoop (94).

4. A magnetic stirrer reagent dripping system according to claim 2, wherein: elastic expansion assembly (15) including set up in flexible groove (14) and with its axial syntropy flexible piece (151), set up slider (152) in flexible piece (151) one end and fix spring (153) on slider (152) lateral wall, the cell wall of flexible groove (14) is equipped with spout (154) that supplies slider (152) to slide along its axial, the one end that slider (152) were kept away from in flexible piece (151) links to each other with the lateral wall of first clamp (93), second clamp (94) respectively, the flexible direction of spring (153) and the axial syntropy of flexible piece (151), the one end that slider (152) were kept away from in spring (153) is fixed on spout (154) keeps away from the cell wall of flexible groove (14) notch.

5. A magnetic stirrer reagent dripping system according to claim 1, wherein: the lifting assembly (11) comprises a handle (112) and a screw rod (111) rotatably arranged in the lifting groove (10), the screw rod (111) is in threaded fit with the lifting block (6), the bottom end of the screw rod (111) is rotatably connected with the groove wall of the lifting groove (10), and the top end of the screw rod (111) extends out of the top wall of the support column (5) and is connected with the handle (112).

6. A magnetic stirrer reagent dripping system according to claim 2, wherein: locating component (13) including set up threaded rod (131) between T type pivot (8) and bearing frame (7) lateral wall, with threaded rod (131) screw-thread fit's nut (132), slip cover establish locating ring (133) on threaded rod (131) and double-phase reference column (134) of setting on locating ring (133) end wall, the lateral wall of elevator (6) is equipped with and fixes column (134) matched with constant head tank (135), nut (132) support tightly on the end wall that locating ring (133) deviates from reference column (134).

7. The reagent dripping system of a magnetic stirrer according to claim 6, wherein: the inner ring wall of the positioning ring (133) is provided with a limiting block (16), and the side wall of the threaded rod (131) is provided with a limiting groove (17) for the limiting block (16) to slide along the axial direction.

8. A magnetic stirrer reagent dripping system according to claim 2, wherein: the side walls of the first clamp (93) and the second clamp (94) are provided with rubber anti-slip pads (18) which are attached to the outer wall of the burette (4).