CN212120037U - Multi-channel automatic liquid filler - Google Patents
Multi-channel automatic liquid filler Download PDFInfo
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- CN212120037U CN212120037U CN202020023615.7U CN202020023615U CN212120037U CN 212120037 U CN212120037 U CN 212120037U CN 202020023615 U CN202020023615 U CN 202020023615U CN 212120037 U CN212120037 U CN 212120037U
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Abstract
The utility model discloses a multi-channel automatic liquid filler, which comprises a positioning system, a liquid adding system, a control system and a bottom plate; the positioning system is electrically connected with the control system; the positioning system is fixed on the bottom plate; the liquid feeding system comprises: the device comprises a cylinder, an injection device, a cylinder driving device, an air inlet valve group, a reagent bottle and a liquid feeding valve group; the air inlet of the reagent bottle is connected with the air outlet of the air inlet valve group, and the liquid outlet of the reagent bottle is connected with the liquid inlet of the liquid adding valve group; the air inlet of the air inlet valve group is communicated with compressed air; the cylinder is fixed on the positioning system and is connected with a cylinder control device; the injection system is connected with the cylinder and is connected with a liquid outlet of the liquid feeding valve group; and the air inlet valve group, the liquid adding valve group and the air cylinder driving device are respectively electrically connected with the control system. The utility model discloses can once insert the needle can be fast accurate add the liquid of various demands, each other do not receive the interference, improved the efficiency of liquid feeding greatly.
Description
Technical Field
The utility model relates to a liquid feeding device technical field, more specifically the automatic liquid filler of multichannel that says so relates to.
Background
In the process of adding scientific test reagents or producing and preparing mixed solutions, one or more kinds of liquid needs to be quantitatively added, on the aspect of liquid adding modes, manual, semi-automatic or full-automatic modes are available, generally a measuring cylinder, a pipette or a pipette is used for manual adding, the manual mode has the defects of low efficiency, large error, large workload, high fatigue, high possibility of making mistakes and the like, generally a multi-channel pipette, an injector or a liquid mixing valve is used for semi-automatic liquid adding modes, generally the volumes of liquid adding are consistent or not different, the liquid adding method is suitable for automatic treatment of batch samples, generally the automatic liquid adding mode is realized by adopting an injection pump and a multi-channel switching valve, the high-precision injection pump and the switching valve have high cost, and the control is complex.
Therefore, how to provide an automatic liquid feeding device with low cost, high efficiency and precision is a problem that needs to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an automatic liquid filler of multichannel, the utility model discloses a positioning system, control system, liquid feeding system can realize automatic liquid feeding.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multi-channel automatic liquid charger comprising: the device comprises a positioning system, a liquid adding system, a control system and a bottom plate; the positioning system is electrically connected with the control system; the positioning system is fixed on the bottom plate;
the liquid feeding system comprises: the device comprises a cylinder, an injection device, a cylinder driving device, an air inlet valve group, a reagent bottle and a liquid feeding valve group;
the air inlet of the reagent bottle is connected with the air outlet of the air inlet valve group, and the liquid outlet of the reagent bottle is connected with the liquid inlet of the liquid adding valve group; the air inlet of the air inlet valve group is communicated with compressed air;
the cylinder is fixed on the positioning system; and is connected with the cylinder control device;
the injection system is connected with the cylinder and is connected with a liquid outlet of the liquid feeding valve group;
and the air inlet valve group, the liquid adding valve group and the air cylinder driving device are respectively electrically connected with the control system.
Further, in the above multi-channel automatic liquid charger, the liquid charging system further comprises: an electronic air pressure controller and an electronic flow meter; the air inlet of the air inlet valve group is communicated with compressed air through an electronic flowmeter and an electronic air pressure controller in sequence; the electronic air pressure controller and the electronic flowmeter are respectively electrically connected with the control system; the air inlet valve group and the liquid adding valve group are both multi-channel electromagnetic valves;
the cylinder control device includes: a three-way needle inlet valve, a three-way needle outlet valve and an air pressure stabilizing valve; the air outlet of the three-way needle inserting valve and the air outlet of the three-way needle withdrawing valve are communicated with the air cylinder through a three-way joint; the three-way needle inserting valve air inlet and the three-way needle withdrawing valve air inlet are respectively communicated with the air outlet of the air pressure stabilizing valve through three-way joints; the air inlet of the air pressure stabilizing valve is communicated with compressed air; the three-way needle inlet valve and the three-way needle outlet valve are respectively electrically connected with the control system;
the cylinder includes: a cylinder barrel, a piston and a cylinder shaft; the piston divides the cylinder into an upper air chamber and a lower air chamber;
the upper air chamber is communicated with the air outlet of the three-way needle inserting valve, and the lower air chamber is communicated with the air outlet of the three-way needle withdrawing valve;
one end of the cylinder shaft is connected with the piston, and the other end of the cylinder shaft is connected with the injection system;
the top of the cylinder barrel is provided with a needle position probe; the piston is provided with a needle position magnet; the needle position probe is electrically connected with the control system;
the injection system comprises: the liquid inlet valve comprises a needle seat and a liquid inlet needle, wherein one end of the needle seat is connected with the air cylinder shaft, the other end of the needle seat is connected with the liquid inlet needle, and the inside of the needle seat is connected with a liquid outlet of the liquid inlet valve group.
Furthermore, both ends of the needle seat are external threads, the middle part of the needle seat is a hexagonal prism, the upper part of the needle seat is externally connected with the air cylinder shaft, the lower part of the needle seat is externally connected with a liquid inlet needle with internal threads, a 90-degree liquid adding channel is arranged in the center of the inside of the external thread of the needle head which is connected with the needle seat and the center of one surface of the hexagonal prism, and a liquid inlet pipe joint is arranged on the prismatic surface. The needle head is internally provided with a thread which is connected to the needle base; a conical sealing ring with a round hole in the middle is arranged in the needle head, and the needle seat, the threaded end face and the conical surface in the needle head are attached to form a sealed space.
Further, in the above multi-channel automatic liquid charger, the positioning system comprises: the device comprises a sample disc, a gear disc, a cylinder arm, a middle shaft device, a side shaft device, a sliding arm, a gear and a power device;
the sample disc and the gear disc are both fixedly arranged on the middle shaft device, and the sample disc is positioned above the gear disc; the sample disc is provided with bottle position holes distributed in an involute manner; a sliding groove corresponding to the bottle position hole is formed in the disc surface of the gear disc;
the middle shaft device and the side shaft device are both vertically arranged on the bottom plate;
one ends of the sliding arm and the cylinder arm are both arranged on the paraxial device, and the sliding arm is parallel to the cylinder arm; a guide head is fixedly arranged on the sliding arm and slides in the sliding groove; the cylinder is fixed on the cylinder arm;
the gear with power device is connected, just the gear with the toothed disc looks adaptation.
Further, in the above multi-channel automatic liquid charger, the slide arm comprises: the upper sliding sheet and the lower sliding sheet are fixedly arranged on the paraxial device, the upper sliding sheet and the lower sliding sheet are PCB (printed circuit board) welded with components, and the guide head is arranged on the upper sliding sheet; the upper sliding sheet and the lower sliding sheet are electrically connected with a control system through conducting wires respectively;
the starting position and the ending position of the sliding chute are respectively provided with a starting magnet and a final magnet; the upper slide is provided with a start position probe and a final position probe; and the initial probe and the final probe are electrically connected with the control device.
Furthermore, in the multi-channel automatic liquid filler, the upper sliding sheet is welded with a capacitive grid displacement sensor, the head part of the capacitive grid displacement sensor is positioned in the guide head, and a capacitive grid circuit is adhered inside the sliding chute; and the capacitive grid displacement sensor is powered by the upper slide.
Further, in the above multi-channel automatic liquid filler, the center shaft device comprises: a middle shaft bearing part and a middle shaft rod; the lower end of the middle shaft lever is assembled in the middle shaft bearing part; the sample disc and the gear disc are fixedly sleeved on the middle shaft rod;
the paraxial device comprises: a side shaft bearing part and a side shaft rod; the lower end of the side shaft rod is assembled in the side shaft bearing part; the upper slide sheet and the lower slide sheet are fixedly sleeved on the side shaft rod;
and the middle shaft bearing part and the side shaft bearing part are vertically arranged on the bottom plate.
Furthermore, the center of one end of the cylinder arm is provided with a through shaft hole, so that the cylinder shaft and the connected needle seat can smoothly pass through the through shaft hole. The center at the other end of cylinder arm is equipped with the locking hole to and keep away from the one side of wearing the shaft hole at the locking hole and be equipped with the locking screw hole, can locate the other axostylus axostyle with the cylinder arm through the locking hole on, the cylinder arm can slide from top to bottom at other axostylus axostyle, when sliding to suitable high position, can use long screw in locking screw hole with cylinder arm clamp lock on other axostylus axostyle, another side at corresponding locking hole has a locking hole breach in addition, can make the centre gripping deformation strength distribution of locking even, it screws up in the centre gripping more easily.
Furthermore, the injection system also comprises an adjusting rod and a bottle blocking piece, wherein the bottle blocking piece is a metal piece provided with a central hole and two side holes; the cylinder is fixed on the cylinder arm through an adjusting rod; the regulation pole is two at least, and the symmetry sets up, it includes to adjust the pole: the nut comprises a screw rod, a nut and a screw, wherein one end of the screw rod is provided with an external thread, the outer part of one end of the screw rod is provided with a hexagonal prism, and the inner part of the hexagonal prism is provided with an internal thread; one end of the external thread of the screw rod penetrates through the cylinder arm to be connected with the cylinder and is locked by a nut; the screw penetrates through the side hole of the bottle blocking piece and is screwed into the internal thread of the screw rod.
Further, in the above multi-channel automatic liquid filler, the middle shaft bearing part and the side shaft bearing part are the same and both comprise: a bearing seat, a bearing and a shaft barrel; the upper part of the bearing seat is provided with an opening, is cylindrical and hollow, and the bottom of the bearing seat is provided with an external thread interface which is screwed on the bottom plate; an annular recess is formed in the bottom connecting bottom plate at the bottom of the bearing sleeve; the two bearings are respectively positioned at the upper end and the lower end in the bearing seat, the shaft cylinder is hollow and cylindrical, the inner diameter of the shaft cylinder is larger than that of the bearings, the shaft cylinder is positioned between the two bearings, and the two end surfaces of the shaft cylinder are in close contact with the end surfaces of the inner rings of the upper bearing and the lower bearing; the middle shaft rod and the side shaft rod penetrate through the bearing and the inner hole of the shaft cylinder.
Further, in the above multi-channel automatic liquid filler, the sample plate and the gear plate are sleeved on the middle shaft rod by a plate seat, and the plate seat includes: the locking device comprises a locking hole positioned in the center, screw holes positioned at four corners and locking nail holes positioned at one side, wherein a locking hole notch is formed in one side of the locking hole, a through locking hole through groove is formed in the other side corresponding to the locking hole notch, and the locking nail holes are perpendicular to the through locking hole through groove; and screw holes consistent with the screw holes are arranged on the gear disc and the sample disc.
Further, in the above multi-channel automatic liquid filler, the sample plate comprises an upper plate, a middle plate, a lower plate, a single-pass copper column, a double-pass copper column and a fixing screw; the middle disc is arranged between the upper disc and the lower disc and is connected with the upper disc through a single-pass copper column and a double-pass copper column and a fixing screw; the upper disc and the middle disc are identical in structure, a middle shaft hole is formed in the center of each upper disc, and bottle position holes which are arranged in an involute mode are formed in the disc surface; the lower disk is the same as the upper disk except that the bottle position hole is not arranged.
Further, in the multi-channel automatic liquid filler, the control system comprises a control panel and a single chip microcomputer, and the control panel is connected with the single chip microcomputer through a flat cable; the positioning system, the air inlet valve group, the liquid feeding valve group and the cylinder driving device are respectively connected with the single chip microcomputer through electric leads and controlled by a program in the single chip microcomputer.
Known through foretell technical scheme, compare with prior art, the utility model discloses beneficial effect as follows:
the electronic air pressure controller can control the air pressure of liquid feeding, the electronic flowmeter can be accurate the gaseous velocity of flow of control, because the control range of atmospheric pressure and velocity of flow is very wide, can combine both to realize high-speed large-traffic liquid feeding, also can realize the accurate liquid feeding of little flow low velocity of flow, liquid feeding velocity range can be from 1 microliter/second to 100 ml/second, and the liquid feeding volume of the different liquid of different passageways can be controlled through the liquid feeding time of controlling every passageway to the singlechip, the control time precision reaches the millisecond level, the liquid of various demands can be accurately added fast to the needle of once advancing, mutual interference is not received, the efficiency of liquid feeding has been improved greatly, realize the automatic accurate interpolation of high efficiency alone or simultaneously to big batch different liquid.
The utility model realizes the purpose that a batch of bottles have more automatic and accurate bottling quantity and only need one injection system through the involute chute, the bottle position hole, the guide head and other positioning devices; meanwhile, the operation is simple, and the equipment cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a cylinder arm structure according to the present invention;
FIG. 3 is a schematic structural view of a gear plate of the present invention;
FIG. 4 is a schematic structural diagram of a disc on a sample disc according to the present invention;
fig. 5 is a schematic view of the structure of the tray seat of the present invention.
Wherein, in the figure,
1-a control panel; 2, a singlechip; 3-three-way needle inlet valve; 4-three-way needle valve withdrawal; 5-air pressure maintaining valve; 6-an air inlet valve group; 7-reagent bottle; 8-liquid adding pipe; 9-a liquid adding valve group; 10-screw bottle; 11-a lock pin hole; 12-locking nails; 13-sample tray; 131-upper disc; 132-middle disc; 133-lower disc; 134-shaft sleeve hole; 135-bottle position hole; 14-a gear disc; 141-a chute; 142-home magnet; 143-final position magnet; 144-a capacitive gate circuit; 15-cylinder; 151-piston; 152-upper air chamber; 153-lower air chamber; 16-a cylinder arm; 17-a middle shaft rod; 18-a side shaft rod; 19-a needle seat; 20-liquid inlet needle; 21-needle position probe; 22-a slider arm; 221-upper sliding sheet; 222-a lower slide; 23-a guide head; 24-a capacitive-gate displacement sensor; 25-a base plate; 26-a motor; 27-a gear; 28-adjusting rod; 29-bottle blocking sheet; 30-a disk seat; 31-a bearing seat; 32-a bearing; 33-shaft cylinder; 34-an electronic air pressure controller; 35-electronic flow meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1-5, the device of the present invention comprises the following main components:
1) the control system comprises: mainly comprises a control panel 1 and a singlechip 2 (a macro-crystal STC12C5A series); the control panel 1, the motor 26 (planetary gear motor), the air inlet valve group 6, the liquid feeding valve group 9, the needle position probe 21, the three-way needle inlet valve 3, the three-way needle outlet valve 4, the upper slide 221 and the lower slide 222 are respectively connected with the singlechip 2 by electric leads and controlled by a program in the singlechip 2. The control panel 1 is connected with the singlechip 2 by a flat cable, and is provided with a liquid crystal display for displaying information and keys for inputting parameters or commands. The final position probe, the initial position probe and the needle position probe 21 are all Hall sensors capable of acquiring position information through magnetic induction; the upper sliding sheet 221 and the lower sliding sheet 222 are long rectangular PCB circuit boards with components welded, the final probe, the initial probe and the capacitive grating displacement sensor 24 are welded on the upper sliding sheet 221 and are all powered by the upper sliding sheet 221, and the head of the capacitive grating displacement sensor is located in the guide head 23. The grid circuit 144 is adhered to the slide groove 141 of the gear plate 14 by a back adhesive.
2) Liquid feeding system
The three-way needle inlet valve 3 and the three-way needle outlet valve 4 are both of a normally closed two-position three-way electromagnetic valve, the valve is provided with three interfaces, namely an air inlet, an air outlet and an air outlet, the air outlet is positioned at the top of the valve, the air inlet is sealed by a sealing gasket in a closed state when the valve is not electrified, air cannot pass through the air inlet, and the air outlet is communicated with an air passage of the air outlet; the air inlet is communicated with the air outlet and the air outlet is not communicated when the valve is in the electrified state; the air inlet of the air inlet valve group 6 is communicated with compressed air, the air outlet is connected with the air inlet of the reagent bottle 7, and the liquid outlet of the reagent bottle 7 is connected with the liquid inlet of the liquid adding valve group 9 through a liquid adding pipe 8; the air outlet of the three-way needle inlet valve 3 is connected with the upper air chamber 152 of the square air cylinder 15, the air inlet of the three-way needle inlet valve is connected with the three-way joint, and the air outlet of the three-way needle inlet valve is communicated with the atmosphere; the air outlet of the three-way needle withdrawing valve 4 is connected with the lower air chamber 153 of the air cylinder 15, the air inlet of the three-way needle withdrawing valve is connected with the other interface of the three-way joint, and the air outlet is communicated with the atmosphere;
the two ends of the needle seat 19 are external threads, the middle part of the needle seat is a hexagonal prism, the external thread on the upper part is connected with a cylinder shaft, the external thread on the lower part is connected with an air inlet needle (side hole needle head) with internal threads, a liquid feeding channel which is 90 degrees is arranged in the center of the internal center of the external thread of the internal connection needle head of the needle seat 19 and the center of one surface of the hexagonal prism, and a liquid inlet pipe joint is arranged on the prismatic surface. The needle is internally threaded and is connected to the hub 19 by this thread. A conical sealing ring with a round hole in the middle is arranged in the needle head, and the threaded end face of the needle seat 19 is attached to the conical surface in the needle head to form a sealed space.
The adjusting rod 28 is in the shape of a long rod, one end of the adjusting rod is provided with external threads, and the outer part of the adjusting rod is provided with hexagonal prisms and internal threads; the bottle stopper 29 is a cuboid metal sheet, a small round hole which can allow the side hole needle head to smoothly pass through is arranged in the center of the sheet, and the small hole has the function of righting the needle head; the middle of the left end and the right end of the bottle blocking piece 29 is provided with a screw hole, a screw passes through the bottle blocking piece 29 and is screwed into the internal thread of the adjusting rod 28, a hexagonal nut is screwed into the external thread of the adjusting rod 28 to serve as a lock, and then the external thread of the adjusting rod 28 passes through the fixing hole in the cylinder arm 16 and is screwed into the thread fixing hole in the cylinder 15. Fig. 3 shows the structure of the cylinder arm 16. When the height of keeping off bottle piece 29 needs to be adjusted, loosen fixed screw and lock before, hexagonal prism on the rotatory regulation pole 28 again, the cylinder screw hole is screwed into to the 28 external screw threads of clockwise rotation regulation pole, the regulation piece position rises, the 28 external screw threads of anticlockwise rotation regulation pole screw out cylinder screw hole, the regulation piece position reduces, adjust to just hide for the position in the aperture that keeps off bottle piece 29 when the syringe needle is in the top position the needle point, and the regulation pole 28 position on both sides is the same high, it can to rotate lock in proper order again.
Compressed air supplies air to the three-way needle inlet valve 3 and the three-way needle outlet valve 4 after passing through the air pressure stabilizing valve 5 and the three-way joint, as shown in figure 2, when the needle needs to be inserted, the three-way needle inlet valve 3 is opened, the compressed air enters the upper air chamber 152 through an air inlet at the upper part of the air cylinder 15, the lower air chamber 153 is at normal pressure, the compressed air pushes the piston 151 and the cylinder shaft in the air cylinder to move downwards and drives the needle seat 19 and the needle head to move downwards together and extend into the screw bottle, at the moment, the three-way needle inlet valve 3 is closed, the compressed air in the upper air chamber 152 is discharged through an exhaust port of the three-way needle inlet valve 3, the normal pressure state in the upper air chamber 152 is maintained. When the needle needs to be withdrawn, the three-way needle withdrawing valve 4 is opened, compressed gas enters the lower air chamber 153 of the air cylinder 15, the piston 151 and the air cylinder are pushed to move axially upwards, the needle seat 19 and the needle head are driven to move upwards, the bottle blocking piece has the function of righting the needle head, when the rod of the piston 151 moves to the uppermost part, the small circular magnet at the center of the top of the rod of the piston 151 is close to the needle position probe 21 fixed at the top outside the square air cylinder, the needle head is indicated to move in place, the system closes the three-way needle withdrawing valve 4 at the moment, and the compressed gas in the lower air chamber 153 is discharged from the exhaust port of the three-way.
Figure 2 shows a cross-section of a cylinder arm 16 with a square cylinder attachment hole for the cylinder and a large central circular hole for the cylinder shaft and associated needle mount 19 to pass through. The left end of the cylinder arm 16 is provided with a cylinder arm 16 locking hole, the cylinder arm 16 can be just sleeved on the side shaft rod 18 through the hole, the cylinder arm 16 can slide up and down on the side shaft rod 18, when the cylinder arm slides to a proper height position, a long screw can be screwed into the locking threaded hole to clamp and lock the cylinder arm 16 on the side shaft rod 18, and the other side corresponding to the locking hole is also provided with a locking hole notch, so that the clamping deformation force of locking can be uniformly distributed, and the clamping and the screwing are easier.
3) Positioning system
Fig. 3 shows a structural diagram of the gear plate 14, and fig. 5 shows a structural diagram of the disk plate 131 on the sample plate 13. As shown in fig. 4, the gear plate 14 is disc-shaped, and has a large circular hole and 4 chassis fixing holes at the center, the gear plate 14 can be locked on the plate holder 30 by screws, and the plate holder 30 is locked on the central shaft by long screws. A ring of teeth are uniformly distributed on the outer ring of the gear disc 14. A slide groove 141 is formed in an involute shape on the front surface of the gear plate 14, and a cylindrical start magnet 142 and a cylindrical end magnet 143 are embedded in a start position of an outer ring of the slide groove 141 and an end position of an inner ring of the slide groove 141, respectively, to indicate a start position and an end position of the slide groove 141. A capacitive gate circuit 144 with a back adhesive is adhered to the middle inside the sliding slot 141 to indicate the displacement of the slider in the sliding slot 141.
FIG. 4 is a structural diagram of the disk 131 on the sample disk 13. In the middle of the upper disc 131, there are a large circle (a boss hole 134) and four screw fixing holes, and screws can be used to fix the disc to the seat 30, and then the seat 30 is locked to the boss by long screws. Middle disc 132 is constructed the same as upper disc 131, and the lower disc is identical to upper disc 131 except that it does not have vial position holes 135.
Fig. 5 is a schematic sectional view of the tray 30. The upper plate 131 or the lower plate 133 can be fixed to the base 30 by screws, the sleeve passes through the locking hole, and the sleeve of the sample plate 13 can be clamped and locked to the base 30 by screwing the lock pin into the lock pin hole 11.
The structure of the sample disk 13 is shown in fig. 1, and the sample disk 13 mainly comprises an upper disk 131, a middle disk 132, a lower disk 133, a disk shaft sleeve, a disk seat 30, a single-pass copper column, a double-pass copper column and a fixing screw. As shown in fig. 5, four screw holes are respectively formed in the outer ring of the upper disc 131, the upper portion of the upper disc 131 is connected with a single-pass copper column by screws, the upper disc 131 is clamped between the screws and the single-pass copper column, the middle disc 132 is clamped between the screw end of the single-pass copper column and a double-pass copper column, the lower disc 133 is clamped between the screws and the double-pass copper column, the four single-pass copper columns, the double-pass copper column and locking screws connect the outer rings of the three discs, and the upper disc 131 and the lower disc 133 are fixed on the disc base 30 by screws at the central portion of the disc, and then the disc hub is penetrated through the upper disc base 30, the middle disc 132 and the lower disc base 30 and is locked on the disc hub by the screws of the upper disc base 30 and the lower disc base 30.
The structure of the middle shaft rod 17 and the side shaft rod 18 is shown in fig. 1. The middle shaft comprises a bearing seat 31, a bearing 32, a shaft barrel 33, a shaft seat hole, a middle shaft rod 17, a key groove and a hand-screwed locking nail. The side bearing comprises a bearing seat 31, a bearing 32, a shaft barrel 33, a shaft seat hole and a side shaft rod 18; the bearing seats 31 of the two shafts have the same structure, the upper parts of the bearing seats are opened and are cylindrical and hollow, and the bottom of the bearing seats are provided with external thread interfaces which can be screwed on the bottom plate 25. An annular recess is formed in the bottom connecting bottom plate 25 of the bearing sleeve, so that the contact surface between the shaft and the bottom plate 25 is reduced by the outer ring of the bearing seat 31, and the bearing seat 31 is kept in close contact with the bottom plate 25 and is perpendicular to the bottom plate 25; two small round holes are arranged on the side wall of the middle part of the bearing seat 31, so that a rod-shaped tool (such as a screwdriver) can be conveniently inserted into the holes to assist in screwing or unscrewing the bearing seat 31. The assembly structure of the middle shaft and the paraxial shaft is also shown in fig. 1, a bearing, a shaft cylinder 33 and another bearing are sequentially arranged at the bottom end of the middle shaft rod 17 in a matching way, the inner ring of the bearing is tightly contacted and matched with the middle shaft rod 17, the shaft cylinder 33 is hollow and cylindrical, two end faces of the shaft cylinder 33 are contacted with the end faces of the inner ring of the bearing but not contacted with the middle shaft rod 17, the upper bearing and the lower bearing are supported, the middle shaft rod 17 is kept vertical, and the middle shaft rod 17, the inner ring of the bearing and the shaft cylinder 33 can simultaneously and smoothly rotate. Then, the middle shaft rod 17 with the bearings and the shaft cylinder 33 inserted is pressed into the bearing seat 31, so that the outer rings of the upper and lower bearings are in close contact with the inner wall of the bearing seat 31, and the middle shaft rod 17 can smoothly rotate in the bearing seat 31. The assembly mode of the side shaft is the same as that of the middle shaft. A long strip-shaped round corner groove is formed in the middle shaft rod 17, a standard round corner flat key can be placed in the round corner flat key, a half height of the round corner flat key protrudes out of the surface of the shaft rod after the round corner flat key is placed in the round corner flat key, when the disc shaft sleeve of the sample disc 13 is sleeved on the middle shaft, the protruding round corner flat key clamps a notch in the disc shaft sleeve, and a hand is screwed into the top of the disc shaft sleeve to screw a locking nail, so that the sample disc 13 is accurately positioned on the middle shaft rod 17.
The positioning principle is as follows: during assembly, the cylinder arm 16 and the slide arm 22 are coaxially fixed on the side shaft rod 18, the vertical position of the needle head is consistent with that of the guide head 23, and the sample disc 13 and the gear disc 14 are also coaxially fixed on the middle shaft rod 17. When positioning is needed, the single chip microcomputer 2 detects the position in the slide arm 22 where the guide head 23 is located according to the start position probe on the slide arm 22, when the position does not meet a specific position, the single chip microcomputer 2 drives the planetary gear motor 26 to rotate, the gear 27 on the motor 26 drives the gear disc 14 to rotate, the sample disc 13 fixed on the central shaft coaxially rotates, and because the guide head 23 on the slide arm 22 is located in the slide groove 141 of the gear disc 14, the guide head 23 is pushed by the slide groove 141 distributed in an involute shape, the guide head 23 pushes the slide arm 22, the slide arm 22 pushes the side shaft rod 18 to rotate, the side shaft rod 18 drives the cylinder arm 16 coaxially fixed to rotate, the cylinder arm 16 drives the needle head to move to the upper side of the corresponding slide groove 141, when the guide head 23 slides in the slide groove 141, the grid displacement sensor in the guide head 23 records the displacement distance, when the distance of movement is reached, the movement is stopped, so that the needle position is stopped at the, and completing the positioning of the needle position.
And because the grooves of the gear disc 14 are distributed in an involute way, the speed difference of the guide head 23 between the outer ring and the inner ring of the chute 141 is large during gear transmission, the single chip microcomputer 2 system records the position of the disc according to an involute function, adjusts the rotating speed of the motor 26, controls the moving speed of the guide head 23 in the chute 141, runs at a high speed when the guide head is far away from a target bottle position and reduces the speed when the guide head is close to the target bottle hole position, and the positioning precision is prevented from being influenced by overlarge rotating inertia. The highest moving speed can reach 1.8 m/s and the displacement resolution can reach 0.02 mm after the capacitive grating is adopted for positioning, so that the position of the sample bottle can be quickly and accurately positioned at variable speed.
4) Main flow for realizing functions
Before liquid adding, parameters of liquid adding, namely the pressure of the electronic air pressure controller 34 for liquid adding of each channel, the flow rate of the electronic flowmeter 35 and the opening and closing time of each channel of the air inlet valve group 6 and the liquid adding valve group 9 need to be set. Further, in order to improve the efficiency of filling, when it is necessary to start filling in a plurality of channels simultaneously, the electronic air pressure controller 34 of each channel may be set to a constant value, and the flow rate of the electronic flow meter 35 may be set to a uniform fixed value, and then the opening and closing time duration of the filling channel may be used to match the filling amount. After the parameters of liquid adding of each channel are set, the singlechip 2 firstly controls the system to be positioned to a specified sample bottle position, then the three-way needle inlet valve 3 is opened, compressed air enters the upper air chamber 152 of the square cylinder 15 through the air pressure stabilizing valve 5, the piston 151 is pushed to move downwards to drive the needle seat 19 and the liquid inlet needle 20 to be inserted into the screw bottle 10, the three-way needle inlet valve 3 is closed, compressed air in the upper air chamber 152 is discharged from the exhaust port of the three-way needle inlet valve 3, then the corresponding channels of the air inlet valve group 6 and the liquid adding valve group 9 are opened, the compressed air enters the reagent bottle 7 through the corresponding channels of the electronic air pressure controller 34, the electronic flowmeter 35 and the air inlet valve group 6 to generate liquid inlet pressure, the pressure pushes the liquid in the reagent bottle 7 to be collected to a liquid outlet pipe of the liquid adding valve group 9 through the liquid adding pipe inserted into the reagent bottle and the corresponding channels opened on the liquid adding valve, then enters the screw bottle 10 through the needle seat 19 and the liquid adding needle 20. When the liquid adding time of a certain channel is reached, the single chip microcomputer 2 controls to close corresponding channels on the air inlet valve group 6 and the liquid adding valve group 9, liquid in a corresponding reagent bottle stops adding, the system closes the liquid adding channels in sequence according to the time length of liquid adding until all the liquid adding channels are closed, at the moment, the three-way needle withdrawing valve 4 is opened, compressed air enters the lower air chamber 153 of the air cylinder 15 through the air pressure stabilizing valve 5 and the three-way needle withdrawing valve 4, and the compressed air pushes the piston 151 to move upwards to drive the liquid inlet needle 20 to be drawn out from the screw bottle 10. When the piston 151 moves to the uppermost part, the system needle position probe 21 senses that the needle is returned, the three-way needle withdrawing valve 4 is closed, and the compressed gas in the lower gas chamber 153 is discharged from the exhaust port of the three-way needle withdrawing valve 4, so that the charging of a sample bottle is completed. And then the singlechip 2 controls the sample bottle to move to the next sample bottle position for automatic liquid adding until all the set sample bottles are completely added with liquid, and the automatic liquid adding of the batch is completed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A multi-channel automatic liquid filler, comprising: the device comprises a positioning system, a liquid adding system, a control system and a bottom plate; the positioning system is electrically connected with the control system; the positioning system is fixed on the bottom plate;
the liquid feeding system comprises: the device comprises a cylinder, an injection system, a cylinder driving device, an air inlet valve group, a reagent bottle and a liquid feeding valve group;
the air inlet of the reagent bottle is connected with the air outlet of the air inlet valve group, and the liquid outlet of the reagent bottle is connected with the liquid inlet of the liquid adding valve group; the air inlet of the air inlet valve group is communicated with compressed air;
the cylinder is fixed on the positioning system; and is connected with the cylinder control device;
the injection system is connected with the cylinder and is connected with a liquid outlet of the liquid feeding valve group;
and the air inlet valve group, the liquid adding valve group and the air cylinder driving device are respectively electrically connected with the control system.
2. Multi-channel automatic liquid charger according to claim 1,
the liquid feeding system further comprises: an electronic air pressure controller and an electronic flow meter; the air inlet of the air inlet valve group is communicated with compressed air through an electronic flowmeter and an electronic air pressure controller in sequence; the electronic air pressure controller and the electronic flowmeter are respectively electrically connected with the control system; the air inlet valve group and the liquid adding valve group are both multi-channel electromagnetic valves;
the cylinder control device includes: a three-way needle inlet valve, a three-way needle outlet valve and an air pressure stabilizing valve; the air outlet of the three-way needle inserting valve and the air outlet of the three-way needle withdrawing valve are respectively communicated with the air cylinder; the three-way needle inserting valve air inlet and the three-way needle withdrawing valve air inlet are communicated with the air outlet of the air pressure stabilizing valve through a three-way joint; the air inlet of the air pressure stabilizing valve is communicated with compressed air; the three-way needle inlet valve and the three-way needle outlet valve are respectively electrically connected with the control system;
the cylinder includes: a cylinder barrel, a piston and a cylinder shaft; the piston divides the cylinder into an upper air chamber and a lower air chamber;
the upper air chamber is communicated with the air outlet of the three-way needle inserting valve, and the lower air chamber is communicated with the air outlet of the three-way needle withdrawing valve;
one end of the cylinder shaft is connected with the piston, and the other end of the cylinder shaft is connected with the injection system;
the top of the cylinder barrel is provided with a needle position probe; the piston is provided with a needle position magnet; the needle position probe is electrically connected with the control system;
the injection system comprises: needle file and feed liquor needle, needle file one end with the cylinder hub connection, the other end with the feed liquor needle is connected, just the needle file inside with the liquid outlet of liquid feeding valves links to each other.
3. The multi-channel automatic liquid charger of claim 1, characterized in that said positioning system comprises: the device comprises a sample disc, a gear disc, a cylinder arm, a middle shaft device, a side shaft device, a sliding arm, a gear and a power device;
the sample disc and the gear disc are both fixedly arranged on the middle shaft device, and the sample disc is positioned above the gear disc; the sample disc is provided with bottle position holes distributed in an involute manner; a sliding groove corresponding to the bottle position hole is formed in the disc surface of the gear disc;
the middle shaft device and the side shaft device are both vertically arranged on the bottom plate;
one ends of the sliding arm and the cylinder arm are both arranged on the paraxial device, and the sliding arm is parallel to the cylinder arm; a guide head is fixedly arranged on the sliding arm and slides in the sliding groove; the cylinder is fixed on the cylinder arm;
the gear with power device is connected, just the gear with the toothed disc looks adaptation.
4. The multi-channel automatic liquid charger of claim 3, characterized in that said slide arm comprises: the upper sliding sheet and the lower sliding sheet are fixedly arranged on the paraxial device, the upper sliding sheet and the lower sliding sheet are PCB (printed circuit board) welded with components, and the guide head is arranged on the upper sliding sheet;
the upper sliding sheet and the lower sliding sheet are electrically connected with a control system through conducting wires respectively;
the starting position and the ending position of the sliding chute are respectively provided with a starting magnet and a final magnet; the upper slide is provided with a start position probe and a final position probe; and the initial probe and the final probe are electrically connected with the control device.
5. The multi-channel automatic liquid filler according to claim 4, wherein the upper slide plate is welded with a capacitive grid displacement sensor, the head of the capacitive grid displacement sensor is positioned in the guide head, and a capacitive grid circuit is adhered inside the sliding groove; and the capacitive grid displacement sensor is powered by the upper slide.
6. The multi-channel automatic liquid charger of claim 4, characterized in that said central shaft device comprises: a middle shaft bearing part and a middle shaft rod; the lower end of the middle shaft lever is assembled in the middle shaft bearing part; the sample disc and the gear disc are fixedly sleeved on the middle shaft rod;
the paraxial device comprises: a side shaft bearing part and a side shaft rod; the lower end of the side shaft rod is assembled in the side shaft bearing part; the upper slide sheet and the lower slide sheet are fixedly sleeved on the side shaft rod;
and the middle shaft bearing part and the side shaft bearing part are vertically arranged on the bottom plate.
7. The multi-channel automatic liquid charger of claim 6, wherein said center shaft bearing assembly and said bypass shaft bearing assembly are identical and each comprise: a bearing seat, a bearing and a shaft barrel; the upper part of the bearing seat is provided with an opening, is cylindrical and hollow, and the bottom of the bearing seat is provided with an external thread interface which is screwed on the bottom plate; an annular recess is formed in the bottom connecting bottom plate at the bottom of the bearing sleeve; the two bearings are respectively positioned at the upper end and the lower end in the bearing seat, the shaft cylinder is hollow and cylindrical, the inner diameter of the shaft cylinder is larger than that of the bearings, the shaft cylinder is positioned between the two bearings, and the two end surfaces of the shaft cylinder are in close contact with the end surfaces of the inner rings of the upper bearing and the lower bearing; the middle shaft rod and the side shaft rod penetrate through the bearing and the inner hole of the shaft cylinder.
8. The multi-channel automatic liquid filler of claim 6, wherein said sample disk and said gear disk are sleeved on said middle shaft rod by a disk seat, said disk seat comprising: the locking device comprises a locking hole positioned in the center, screw holes positioned at four corners and locking nail holes positioned at one side, wherein a locking hole notch is formed in one side of the locking hole, a through locking hole through groove is formed in the other side corresponding to the locking hole notch, and the locking nail holes are perpendicular to the through locking hole through groove; and screw holes consistent with the screw holes are arranged on the gear disc and the sample disc.
9. The multi-channel automatic liquid filler of claim 3, wherein said sample plate comprises an upper plate, a middle plate, a lower plate, a single-pass copper pillar, a double-pass copper pillar and a set screw; the middle disc is arranged between the upper disc and the lower disc and is connected with the upper disc through a single-pass copper column and a double-pass copper column and a fixing screw; the upper disc and the middle disc are identical in structure, a middle shaft hole is formed in the center of each upper disc, and bottle position holes which are arranged in an involute mode are formed in the disc surface; the lower disk is identical to the upper disk in structure except that the bottle position hole is not formed in the lower disk.
10. The multi-channel automatic liquid filler according to any one of claims 1-9, wherein said control system comprises a control panel and a single chip, said control panel being connected to said single chip by a flat cable; the positioning system, the air inlet valve group, the liquid feeding valve group and the cylinder driving device are respectively connected with the single chip microcomputer through electric leads and controlled by a program in the single chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020023615.7U CN212120037U (en) | 2020-01-06 | 2020-01-06 | Multi-channel automatic liquid filler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020023615.7U CN212120037U (en) | 2020-01-06 | 2020-01-06 | Multi-channel automatic liquid filler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068802A (en) * | 2020-01-06 | 2020-04-28 | 中国农业科学院农业环境与可持续发展研究所 | Multi-channel automatic liquid filler |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111068802A (en) * | 2020-01-06 | 2020-04-28 | 中国农业科学院农业环境与可持续发展研究所 | Multi-channel automatic liquid filler |
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