CN111947761A - Laboratory control chemical metering device - Google Patents
Laboratory control chemical metering device Download PDFInfo
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- CN111947761A CN111947761A CN202010810403.8A CN202010810403A CN111947761A CN 111947761 A CN111947761 A CN 111947761A CN 202010810403 A CN202010810403 A CN 202010810403A CN 111947761 A CN111947761 A CN 111947761A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/62—Over or under weighing apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
- B01L1/50—Enclosures; Chambers for storing hazardous materials in the laboratory, e.g. cupboards, waste containers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the field of laboratory tools, and particularly discloses a laboratory control chemical metering device which comprises a metering box, wherein a partition plate is arranged in the metering box, a weighing device is arranged at the bottom of the metering box, a clamping assembly is arranged on the inner wall of the upper end of the metering box, the clamping assembly comprises a round hole formed in the upper side wall of the metering box, a rubber bag matched with the round hole is arranged on the outer side of the upper end of the metering box, clamping pincers are sleeved in the rubber bag, and the clamping pincers comprise a fixed clamp and a movable clamp. The laboratory control chemical metering device provided by the invention is provided with the air inlet hole and the air outlet hole, and nitrogen is introduced through the air inlet hole to discharge air in the metering box, so that the contact between flammable solids and air is reduced; the changeable clamping pliers are arranged, so that the combustible solid can be clamped and decomposed, and the required chemicals can be weighed conveniently, quickly and accurately.
Description
Technical Field
The invention relates to the field of laboratory articles, in particular to a laboratory controlled chemical metering device.
Background
The chemical has different characteristics such as flammability, volatility, and for the chemical in laboratory, the chemical of different characteristics also has different storage and take the mode, when storing and taking, all need very paying attention to, wherein, for the management and control chemical of flammable solid, for example yellow phosphorus, it needs very paying attention to when taking according to the measurement, and current metering device that the laboratory managed and controlled chemical has certain drawback when using.
When taking the management and control chemicals of inflammable solid, not only it is accurate to measure, and it will be fast to still need to weigh speed, avoids inflammable solid to cause the spontaneous combustion with air, moisture contact and production friction etc. for a long time, and current metering device can not accomplish the protection work to inflammable solid when taking inflammable solid, reduces the contact with the air promptly and can decompose inflammable solid when taking promptly and conveniently weigh accurate needs volume.
Disclosure of Invention
The invention aims to solve the problem of providing a laboratory control chemical metering device, which solves the problems of the existing metering device for controlling chemicals and achieves the purposes of reducing the contact of the control chemicals with air, rapidly decomposing flammable solids and conveniently weighing accurate demand.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a laboratory control chemicals metering device, includes the batch meter, be equipped with the baffle in the batch meter, the batch meter bottom is equipped with the weighing device, batch meter upper end inner wall is equipped with to press from both sides gets the subassembly.
The clamping assembly comprises a circular hole formed in the upper side wall of the metering box, a rubber bag matched with the circular hole is arranged on the outer side of the upper end of the metering box, a clamping clamp is sleeved in the rubber bag and comprises a fixed clamp and a movable clamp.
The clamp is characterized in that an auxiliary block is arranged at the lower end of the fixed clamp, a circular groove is formed in the auxiliary block, a rotating ball is rotatably connected in the circular groove, a conical hole is formed in the upper side of the rotating ball, an arc-shaped sliding groove is formed in the inner side of the rotating ball, a ball is slidably connected in the arc-shaped sliding groove, and a spring is arranged between the ball and the inner side wall of the circular groove.
The fixed clamp is characterized in that a cutting groove is formed in the lower end of the inner side of the fixed clamp, fixed clamp teeth and fixed tooth grooves are formed in the fixed clamp on the two sides of the cutting groove, and the fixed clamp teeth and the fixed tooth grooves are distributed in a staggered mode.
The lower end of the movable clamp is provided with a taper rod which is matched with the taper hole, the lower end of the inner side of the movable clamp is provided with a cutter which is matched with the cutting groove, movable clamp teeth and movable tooth grooves are arranged on the movable clamp at two sides of the cutter, and the movable clamp teeth and the movable tooth grooves are distributed in a staggered mode.
As a preferred technical scheme of the present invention, a connecting plate is disposed in the middle of the fixed clamp, a first arc-shaped groove close to the upper side of the fixed clamp and a second arc-shaped groove close to the lower side of the fixed clamp are disposed on the connecting plate, and the first arc-shaped groove and the second arc-shaped groove are connected through a connecting groove.
As a preferred technical scheme of the invention, the upper side of the fixed clamp is provided with a connecting rod, and the connecting rod is provided with a clamping groove.
As a preferable technical scheme of the invention, the middle part of the movable clamp is provided with a connecting cylinder which is matched with the connecting groove, the upper end of the movable clamp is provided with a clamping rod which is matched with the clamping groove, and the upper end of the outer side of the movable clamp is provided with a retaining ring.
As a preferable technical scheme of the invention, the fixed clamping teeth and the movable clamping teeth are both of a concave structure from the periphery to the middle.
As a preferable technical scheme of the invention, the weighing device comprises an electronic scale arranged at the lower end of the metering box, a scale pan of the electronic scale is positioned above a partition plate, and the partition plate is provided with a through hole matched with the electronic scale.
As a preferable technical scheme, the side wall of the upper end of the metering box is provided with an air inlet, the side wall of the lower end of the metering box is provided with an air outlet, a one-way air valve is arranged in the air outlet, and the side wall of the upper end of the metering box is rotatably connected with a sealing cover.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the laboratory control chemical metering device provided by the invention is provided with the air inlet hole and the air outlet hole, and nitrogen is introduced through the air inlet hole to discharge air in the metering box, so that the contact between flammable solids and air is reduced; the changeable clamping pliers are arranged, so that the combustible solid can be clamped and decomposed, and the required chemicals can be weighed conveniently, quickly and accurately.
2. According to the laboratory control chemical metering device provided by the invention, the air inlet is formed, and the original air in the metering box is replaced by filling nitrogen, so that the contact between a flammable solid and the air is reduced, and the oxygen required by the combustion of the flammable solid is blocked, so that the flammable solid is decomposed under the condition of nitrogen, the frictional combustion of the flammable solid is avoided, and the decomposition of the flammable solid is facilitated.
3. The laboratory pipe-control chemical metering device provided by the invention is provided with the changeable clamping pincers, and the clamping pincers can clamp redundant flammable solids and can also finely decompose the flammable solids, so that the required weight of the flammable solids can be weighed conveniently, quickly and accurately.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the grasping forceps of the present invention;
FIG. 3 is a schematic view of the internal structure of the pliers of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 3 according to the present invention;
FIG. 6 is a schematic structural view of the fixed clamp and the movable clamp of the present invention connected by a connecting plate;
fig. 7 is a structural schematic view of a fixed clamp and a movable clamp of a second embodiment of the invention.
Wherein: 1 metering box, 11 air inlet holes, 12 air outlet holes, 13 sealing covers, 14 temporary storage boxes, 2 partition plates, 3 weighing devices, 31 electronic scales, 4 clamping components, 41 rubber bags, 42 clamping pincers, 43 fixed clamps, 431 auxiliary blocks, 432 circular grooves, 433 rotating balls, 434 conical holes, 435 arc-shaped sliding grooves, 436 balls, 437 springs, 438 cutting grooves, 439 fixed clamping teeth, 430 fixed tooth grooves, 44 movable clamps, 441 conical rods, 442 cutters, 443 movable clamping teeth, 444 movable tooth grooves, 45 connecting plates, 451 first arc-shaped grooves, 452 second arc-shaped grooves, 453 connecting grooves, 454 connecting cylinders, 46 connecting rods, 47 clamping grooves, 48 clamping rods and 49 retaining rings.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 to 7, the technical solution provided by the present invention is: the utility model provides a laboratory control chemicals metering device, includes batch meter 1, and batch meter 1 is the transparent glass material, conveniently observes the weight of electronic scale 31 and presss from both sides with pressing from both sides to get pincers 42 and press from both sides and get and easily fire fixedly, is equipped with baffle 2 in batch meter 1, and 1 bottoms of batch meter are equipped with weighing device 3, and 1 upper end inner wall of batch meter is equipped with to press from both sides and gets subassembly 4.
Referring to fig. 1, an air inlet 11 is formed in the side wall of the upper end of a metering box 1, the air inlet 11 is communicated with an external nitrogen pipe, nitrogen is conveniently filled into the metering box 1, an air outlet 12 is formed in the side wall of the lower end of the metering box 1, a one-way air valve is arranged in the air outlet 12, and a sealing cover 13 is rotatably connected to the side wall of the upper end of the metering box 1.
The weighing device 3 comprises an electronic scale 31 arranged at the lower end of the metering box 1, a scale pan of the electronic scale is positioned above the partition plate 2, and the partition plate 2 is provided with a through hole matched with the electronic scale 31; at specific during operation, press from both sides and get on the flammable solid of suitable volume and place into the pan of electronic scale, then cover sealed lid 13 and fill into nitrogen gas in to batch meter 1 through inlet port 11, the air in batch meter 1 passes through venthole 12 and discharges this moment, the realization is with the air replacement in batch meter 1 for the nitrogen gas of stable nature, both reduced the contact of flammable solid and air, the required oxygen of flammable solid burning has been completely cut off again, convenient follow-up decomposition operation to the flammable solid, the guarantee is flammable solid even can not burn when receiving the friction yet.
Referring to fig. 2-5, the combustible solids are clamped: press from both sides and get subassembly 4 including setting up the round hole of lateral wall on batch meter 1, batch meter 1 upper end outside is equipped with the rubber bag 41 that suits with the round hole, has cup jointed in the rubber bag 41 and has got pincers 42, should cup joint the mode and be similar to the guard bag that manual fender car pin cup jointed, in this embodiment is in order to prevent that the air from entering into batch meter 1, gets pincers 42 and includes deciding clamp 43 and moving clamp 44.
The upper side of the fixed clamp 43 is provided with a connecting rod 46, and the connecting rod 46 is provided with a clamping groove 47.
A clamping rod 48 matched with the clamping groove 47 is arranged at the upper end of the movable clamp 44, and a retaining ring 49 is arranged at the upper end of the outer side of the movable clamp 44; when flammable solids need to be clamped, the clamping ring 49 is pulled to clamp the clamping rod 48 into the clamping groove 47, the fixed clamp 43 and the movable clamp 44 are connected at the upper end to form a tweezers structure, the movable clamp 44 and the fixed clamp 43 are controlled at the moment, the movable clamp teeth at the lower end of the fixed clamp 43 can be matched with the fixed clamp teeth at the lower end of the fixed clamp 43, the flammable solids on the scale plate of the electronic scale 31 can be conveniently clamped, when the amount of the flammable solids on the scale plate is far more than the required amount, small flammable solids can be clamped and placed in the temporary storage box 14 of the side wall, and on the contrary, the flammable solids are clamped from the temporary storage box 14 to supplement the weight on the scale plate of the electronic scale 31.
Referring to fig. 3-5, combustible solids are decomposed: an auxiliary block 431 is arranged at the lower end of the fixed clamp 43, a circular groove 432 is formed in the auxiliary block 431, a rotating ball 433 is rotatably connected in the circular groove 432, a conical hole 434 is formed in the upper side of the rotating ball 433, an arc-shaped sliding groove 435 is formed in the inner side of the rotating ball 433, a ball 436 is slidably connected in the arc-shaped sliding groove 435, and a spring 437 is arranged between the ball 436 and the inner side wall of the circular groove 432; in the present embodiment, the distance from the bottom of the conical hole 434 to the lower end of the fixed clamp tooth 439 is equal to the length of the conical rod 441, so as to ensure that the fixed clamp tooth 439 corresponds to the movable clamp tooth 443 when the fixed clamp 43 and the movable clamp 44 are connected by the rotating ball 433.
Preferably, the cutting groove 438 corresponds to the conical hole 434, when in use, the conical rod 441 can enter the conical hole 434 downwards along the cutting groove 438, so as to ensure that the conical rod 441 can enter the conical hole 434 smoothly, the rotating ball 433 is limited by the spring 437, and the ball 436 at one end of the spring 437 is connected with the arc-shaped sliding groove 435 on the rotating ball 433 in a sliding manner, so that the conical hole 434 on the rotating ball 433 can be ensured to always face upwards, further the conical rod 441 can enter the conical hole 434 smoothly, and the arc-shaped sliding groove 435 and the ball 436 are arranged to ensure that the rotating ball 433 still has a small-range swing space in a fixed direction even under the limiting condition of the spring 437, so that the fixed clamp 43 and the movable clamp 44 can be flexibly and stably matched when connected through the rotating ball 433.
The lower end of the movable clamp 44 is provided with a conical rod 441 corresponding to the conical hole 434, the lower end of the inner side of the movable clamp 44 is provided with a cutter 442 corresponding to the cutting groove 438, movable clamp teeth 443 and movable tooth grooves 444 are arranged on the movable clamp 44 at the two sides of the cutter 442, the movable clamp teeth 443 and the movable tooth grooves 444 are distributed in a staggered manner, and the middle part of the movable clamp 44 is provided with a connecting cylinder 454 corresponding to the connecting groove 453; at specific during operation, when the weight of easily burning solid on the electronic scale 31 pan of steelyard is close to required weight but when not accurate enough, the pincers 42 state is got in the adjustment clamp, will press from both sides the state and change the position and press from both sides the state of holding and pinch, decide clamp 43 and move clamp 44 and be connected at the lower extreme with deciding clamp 43 and moving clamp 44 in the upper end connection conversion promptly, pinch the piece with less easily burning solid again, conveniently press from both sides the flammable solid of getting littleer piece, guarantee the accuracy of easily burning solid weight on the electronic scale 31 pan of steelyard, concrete step is as follows:
the clamping rod 48 is taken out of the clamping groove 47 by pushing the retaining ring 49 and pushed downwards, so that the conical rod 441 at the lower end of the movable clamp is clamped into the conical hole 434 on the rotating ball 433, at the moment, the fixed clamp and the movable clamp are connected at the lower end through the rotating ball 433, then small inflammable solids are clamped, at the moment, the inflammable solids are clamped between the fixed clamping tooth 439 and the movable clamping tooth 443, then the fixed clamp and the movable clamp are squeezed towards the middle, under the action of the fixed clamping tooth 439, the movable clamping tooth 443, the cutting groove 438 and the cutter 442, the inflammable solids are clamped, and finally the small inflammable solids are clamped and taken out or supplemented, so that the weighing amount can accurately reach the required amount.
It should be added that: through the operation of the steps, the problem that the original flammable solid cannot be weighed accurately by repeatedly clamping can be well solved, and the required amount of the flammable solid can be weighed more quickly by clamping the original flammable solid; simultaneously, press from both sides with the clamp of not switching state and compare, when pressing from both sides the bits of broken glass and fire the solid, the state after the conversion can be more laborsaving, and when the clamp after the conversion was got to clamp 42 it and is pressed from both sides the bits of broken glass and fire the solid, the position of firing the solid is more close to the connection ball, and it is more laborsaving when can ensure to press from both sides the bits of broken glass and fire the solid.
Referring to fig. 4, further, the fixed clamp tooth 439 and the movable clamp tooth 443 are recessed from the periphery to the middle; the fixed clamping teeth 439 and the movable clamping teeth 443 are both of structures which are concave towards the middle part, so that the clamped combustible solid is positioned in the middle parts of the fixed clamping teeth 439 and the movable clamping teeth 443, and the stability of the clamped combustible solid is guaranteed; still further, when the inflammable solid is crushed, the inflammable solid can be ensured to keep stable.
Furthermore, the lower end of the inner side of the fixed clamp 43 is provided with a cutting groove 438, the fixed clamp 43 on both sides of the cutting groove 438 is provided with fixed clamping teeth 439 and fixed tooth grooves 430, and the fixed clamping teeth 439 and the fixed tooth grooves 430 are distributed in a staggered manner; during specific work, due to the staggered distribution of the fixed clamping teeth 439, the fixed tooth grooves 430, the movable clamping teeth 443 and the movable tooth grooves 444, when flammable solids are clamped, the flammable solids are not only cut into pieces by the cutter grooves and the cutters 442, but also clamped by the fixed clamping teeth 439 and the movable clamping teeth 443, so that the flammable solids are quickly clamped, and in the clamping process, due to the staggered distribution of the fixed clamping teeth 439, the fixed tooth grooves 430, the movable clamping teeth 443 and the movable tooth grooves 444, when the flammable solids are clamped, the movable clamping teeth 443 can be clamped into the fixed tooth grooves 430, and the fixed clamping teeth 439 can be clamped into the movable tooth grooves 444, so that the flammable solids are clamped.
It should be added that: because original air replacement is filled into through filling into nitrogen gas in the batch meter 1, no longer have the required oxygen of inflammable solid burning in the batch meter 1 this moment to when pressing from both sides the piece inflammable solid, even produce the friction, also can ensure that inflammable solid can not burn.
Referring to fig. 6, the gripping pliers 42 are stable in state transition: the middle part of the fixed clamp 43 is provided with a connecting plate 45, the connecting plate 45 is provided with a first arc-shaped groove 451 close to the upper side of the fixed clamp 43 and a second arc-shaped groove 452 close to the lower side of the fixed clamp 43, and the first arc-shaped groove 451 and the second arc-shaped groove 452 are connected through a connecting groove 453; when the connection position of the fixed clamp 43 and the movable clamp 44 of the clamping pincers 42 is converted between the upper end and the lower end during specific work, the movable clamp 44 is always connected with the connecting plate 45 through the connecting cylinder 454, so that the stability of the movable clamp 44 during conversion is guaranteed, and the difficulty of moving the movable clamp 44 is reduced.
When the upper ends of the fixed clamp 43 and the movable clamp 44 are connected through the clamping rod 48, the arc-shaped structure of the first arc-shaped groove 451 is adapted to the motion track of the movable clamp 44, and similarly, when the lower ends of the fixed clamp 43 and the movable clamp 44 are connected through the rotating ball 433, the arc-shaped structure of the second arc-shaped groove 452 is adapted to the motion track of the movable clamp 44; during specific work, when the connection point of the movable clamp 44 and the fixed clamp 43 is at the upper end, the rotation point of the movable clamp 44 is on the clamping rod 48, and the arc structure of the first arc-shaped groove 451 is adapted to the movement track of the movable clamp 44 taking the central line of the clamping rod as the rotation axis, so that the movable clamp 44 can stably slide on the first arc-shaped groove 451 on the connection plate 45; similarly, when the connection point of the movable clamp 44 and the fixed clamp 43 is at the lower end, that is, the fixed clamp 43 and the movable clamp 44 are connected through the rotating ball 433, the rotating point of the movable clamp 44 is on the rotating ball 433, and the arrangement of the second arc-shaped groove 452 also ensures the stability of the movement of the movable clamp 44.
Referring to fig. 7, finally, a further advantageous embodiment of the invention is expanded: the structure of the present embodiment is the same as that of the above embodiment, and the difference is that only the first notch a corresponding to the inner side of the lower end of the fixed clamp 43 and the movable clamp 44 is provided, and the second notch b corresponding to the inner side of the fixed clamp 43 and the movable clamp 44 is provided, through the arrangement of the first notch a, when the fixed clamp 43 and the movable clamp 44 are switched to the connection point at the lower end, the fixed clamp 43 and the movable clamp 44 can smoothly clamp the inflammable solid, that is, the position near the connection ball 433 is narrower, so that the fixed clamp 43 and the movable clamp 44 cannot be kneaded; and the second notch b is arranged, so that when the fixed clamp 43 and the movable clamp 44 are connected through the rotating ball 433, the fixed clamp 43 and the movable clamp 44 have a certain inclinable angle, so that when combustible solids are crushed through the fixed clamp 43 and the movable clamp 44, the protruded corners of the larger combustible solids can be crushed, and the operation is more flexible and changeable.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (7)
1. The utility model provides a laboratory control chemicals metering device, includes batch meter (1), its characterized in that: a partition plate (2) is arranged in the metering box (1), a weighing device (3) is arranged at the bottom of the metering box (1), and a clamping assembly (4) is arranged on the inner wall of the upper end of the metering box (1);
the clamping assembly (4) comprises a circular hole arranged on the upper side wall of the metering box (1), a rubber bag (41) matched with the circular hole is arranged on the outer side of the upper end of the metering box (1), a clamping clamp (42) is sleeved in the rubber bag (41), and the clamping clamp (42) comprises a fixed clamp (43) and a movable clamp (44);
an auxiliary block (431) is arranged at the lower end of the fixed clamp (43), a circular groove (432) is formed in the auxiliary block (431), a rotating ball (433) is connected in the circular groove (432) in a rotating mode, a conical hole (434) is formed in the upper side of the rotating ball (433), an arc-shaped sliding groove (435) is formed in the inner side of the rotating ball (433), a ball (436) is connected in the arc-shaped sliding groove (435) in a sliding mode, and a spring (437) is arranged between the ball (436) and the inner side wall of the circular groove (432);
a cutting groove (438) is formed in the lower end of the inner side of the fixed clamp (43), fixed clamp teeth (439) and fixed tooth grooves (430) are formed in the fixed clamp (43) on two sides of the cutting groove (438), and the fixed clamp teeth (439) and the fixed tooth grooves (430) are distributed in a staggered mode;
the lower end of the movable clamp (44) is provided with a taper rod (441) matched with the taper hole (434), the lower end of the inner side of the movable clamp (44) is provided with a cutter (442) matched with the cutting groove (438), movable clamp teeth (443) and movable tooth grooves (444) are arranged on the movable clamp (44) on two sides of the cutter (442), and the movable clamp teeth (443) and the movable tooth grooves (444) are distributed in a staggered mode.
2. A laboratory controlled chemical metering device as defined in claim 1, wherein: the middle part of the fixed clamp (43) is provided with a connecting plate (45), the connecting plate (45) is provided with a first arc-shaped groove (451) close to the upper side of the fixed clamp (43) and a second arc-shaped groove (452) close to the lower side of the fixed clamp (43), and the first arc-shaped groove (451) and the second arc-shaped groove (452) are connected through a connecting groove (453).
3. A laboratory controlled chemical metering device as defined in claim 1, wherein: decide clamp (43) upside and be equipped with connecting rod (46), be equipped with draw-in groove (47) on connecting rod (46).
4. A laboratory controlled chemical metering device as defined in claim 3, wherein: the middle part of the movable clamp (44) is provided with a connecting cylinder (454) which is matched with the connecting groove (453), the upper end of the movable clamp (44) is provided with a clamping rod (48) which is matched with the clamping groove (47), and the upper end of the outer side of the movable clamp (44) is provided with a retaining ring (49).
5. A laboratory controlled chemical metering device as defined in claim 1, wherein: the fixed clamping teeth (439) and the movable clamping teeth (443) are both of a concave structure from the periphery to the middle.
6. A laboratory controlled chemical metering device as defined in claim 1, wherein: the weighing device (3) comprises an electronic scale (31) arranged at the lower end of the metering box (1), a scale pan of the electronic scale (31) is positioned above the partition plate (2), and a through hole matched with the electronic scale (31) is formed in the partition plate (2).
7. A laboratory controlled chemical metering device as defined in claim 1, wherein: the upper end lateral wall of batch meter (1) is equipped with inlet port (11), the lower extreme lateral wall of batch meter (1) is equipped with venthole (12), just be equipped with one-way pneumatic valve in venthole (12), the upper end lateral wall of batch meter (1) rotates and is connected with sealed lid (13), still be provided with temporary storage box (14) on the upper end inside wall of batch meter (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010810403.8A CN111947761B (en) | 2020-08-12 | 2020-08-12 | Laboratory control chemical metering device |
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| CN202010810403.8A CN111947761B (en) | 2020-08-12 | 2020-08-12 | Laboratory control chemical metering device |
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| CN111947761B CN111947761B (en) | 2021-11-09 |
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