CN210460974U - Accurate input ware of biochemical appearance reagent - Google Patents
Accurate input ware of biochemical appearance reagent Download PDFInfo
- Publication number
- CN210460974U CN210460974U CN201920842148.8U CN201920842148U CN210460974U CN 210460974 U CN210460974 U CN 210460974U CN 201920842148 U CN201920842148 U CN 201920842148U CN 210460974 U CN210460974 U CN 210460974U
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- reagent
- cavity
- feeding mechanism
- plunger rod
- loader
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Abstract
The utility model discloses an accurate input ware of biochemical analyzer reagent, including step motor, input mechanism, cavity and loading mechanism, input mechanism is through setting up the motor shaft cooperation of internal and external screw thread and step motor simultaneously, thereby the cavity constructs the card with input mechanism and forms a body structure, loading mechanism and cavity intercommunication, wherein the packing has reagent, carries out loading of reagent to the cavity. The utility model discloses a set up interior external screw thread and step motor's motor shaft cooperation simultaneously, rotate by the motor shaft and drive the motion of plunger stick, set up interior external screw thread simultaneously and make the correlation coefficient of the displacement volume of plunger stick motion be the pitch difference of interior external screw thread of the mounting nut of input mechanism, its order of magnitude is more meticulous than the current lead screw that directly uses to drive the motion of plunger stick, has improved the precision of plunger stick displacement; through setting up reagent loader and loader adapter, can make reagent follow in the loader get into the cavity after can not be because in the effect of pressure by the refluence reagent loader.
Description
Technical Field
The utility model belongs to life science instrument, external diagnostic equipment and analytical instrument field specifically indicate a precision input ware of biochemical appearance reagent.
Background
In the fields of life science instruments, in-vitro diagnostic equipment and analytical instruments, a great number of instruments need to accurately obtain trace liquid (including samples and reagents), for example, the reagent samples of a full-automatic biochemical analyzer are all in the micro-scale, an injector adopts an inlet high-precision glass tube and a polytetrafluoroethylene piston, an injection type pump is driven by a stepping motor to inject high-precision samples and reagents, and the volume of the liquid is increased from a few microliters to a few milliliters.
The precision measuring apparatus on the market at present is a liquid measuring apparatus, which mainly comprises a stepping motor, a transmission mechanism, a sensing device, a sealing element, a plunger rod, a cavity and other parts, and is mainly driven by the stepping motor through the main principle of the precision measuring apparatus, the plunger rod is driven to move up and down through the transmission mechanism, the change of the sealed volume is completed through the matching of the sealing element and the cavity when the plunger rod moves up and down, the liquid sucking and discharging process is completed, the position of the plunger is sensed by the sensor in the plunger moving process, and the liquid sucking and discharging can be precisely controlled by controlling the position of the plunger rod in the process. Such precision gauges are more highly integrated, integrating into the pump body structures or components that function as the syringe pump chamber and piston. The pump has the advantages that the volume of the pump body is greatly reduced, the sealing fit service life of the piston is greatly prolonged, and the pump has the defect of fixed capacity. However, for mass produced instrument products, the capacity requirement of each pump is fixed. The transmission mechanism of these pumps is composed of a stepping motor, a lead screw connected with the shaft of the stepping motor, a lead screw nut and a guide part thereof, a piston fixed on the nut, a pump cavity and a sealing ring. The disadvantage of this construction is that the assembly process is cumbersome and the pump body is large in size.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a precise measuring device for biochemical analyzer reagent.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a precision measuring ware of biochemical analyzer reagent, includes step motor, advance volume mechanism, cavity and filling mechanism, advance volume mechanism is through setting up the motor shaft cooperation of internal and external screw thread and step motor simultaneously, thereby the cavity with advance volume mechanism card and form integrative structure, filling mechanism and cavity intercommunication have the reagent wherein to fill, carry out the packing of reagent to the cavity.
Furthermore, the feeding mechanism comprises a plunger rod, a nut mounting bracket, a feeding guide pin, a feeding mechanism positioning ferrule, a feeding mechanism bracket and a feeding mechanism mounting nut, the feeding mechanism is positioned at the motor shaft end of the stepping motor through a feeding mechanism positioning ferrule, the inner and outer rings of the feeding mechanism mounting nut are both provided with threads, the inner thread of the nut is matched with a motor shaft of the stepping motor, the outer thread of the nut is matched with one end of the nut mounting bracket, one end of the plunger rod is fixed at the other end of the nut mounting bracket, the feeding mechanism bracket is sleeved at the outer sides of the nut mounting bracket and the plunger rod, the inside of the feed mechanism bracket is matched with two feed guide pins fixed on the nut mounting bracket by arranging two guide grooves, the other end of the plunger rod protrudes above the feeding mechanism support, and the plunger rod penetrates into the cavity.
Furthermore, a sealing ring is arranged at one end of the plunger rod protruding out of the feeding mechanism support, and the sealing ring is fixed with the feeding mechanism support.
Furthermore, the sealing ring is made of polyether-ether-ketone PEEK, polytetrafluoroethylene PTFE, polyurethane, fluorine-containing rubber or silicon rubber materials in wear-resistant materials; the plunger rod is made of ceramic or metal materials in wear-resistant and high-strength materials; and a sealing fit is formed between the outer circular surface of the plunger rod and the inner circular surface of the sealing ring, and the fit is a clearance fit, a zero clearance fit or an interference fit.
Still further, still include position sensing mechanism, position sensing mechanism includes opto-coupler, opto-coupler gasket and opto-coupler round pin, the opto-coupler round pin sets up at nut installing support shell, and its both ends are connected nut installing support and input mechanism support respectively, the opto-coupler passes through opto-coupler gasket and input mechanism support fixed connection.
Furthermore, the cavity is symmetrically provided with a plurality of through holes, and connecting pieces are arranged in the through holes and are respectively connected with the feeding mechanism bracket and the cavity, so that the feeding mechanism bracket and the cavity form an integrated mechanism; a reagent output channel which is concentric with the plunger rod is arranged in the middle of the cavity, and the plunger rod penetrates into the reagent output channel; and a reagent filling channel vertical to the reagent output channel is formed in the reagent output channel.
Further, the loading mechanism comprises a reagent loader, a loader adapter and a loader support, a through hole is formed in the loader adapter, one end of the through hole is communicated with the reagent loading channel of the cavity, the other end of the through hole is communicated with the reagent outlet of the reagent loader, one side of the loader support is fixed with the stepping motor, and the other side of the loader support is fixed with the reagent loader.
Furthermore, the shell of the stepping motor is provided with a measuring device mounting bracket, one side of the measuring device mounting bracket is fixed with the stepping motor, and the other side of the measuring device mounting bracket is provided with a plurality of threaded holes.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: the precise measuring device for the biochemical instrument reagent is provided with the inner threads and the outer threads which are matched with a motor shaft of the stepping motor, the motor shaft rotates to drive the plunger rod to move, and the inner threads and the outer threads are arranged to ensure that the relative coefficient of the movement displacement of the plunger rod is the pitch difference of the inner threads and the outer threads of the mounting nut of the measuring mechanism, so that the magnitude order of the precise measuring device is more precise than that of the prior device which directly uses a lead screw to drive the plunger rod to move, and the displacement precision of the plunger rod is improved; by arranging the reagent loader and the loader adapter, the reagent can not flow back to the reagent loader under the action of pressure after entering the cavity from the loader; in addition, the whole precision feeder is fixedly installed everywhere by arranging the feeder installation bracket, so that the precision feeder is convenient and portable; the loader is fixed by arranging the loader bracket, so that the loader can be detached and replaced at any time when needing to be cleaned, and the structure is simple and practical; the sealing ring is positioned between the cavity and the support of the feeding mechanism, does not move back and forth along with the plunger rod, is not easy to lose, does not need to be frequently replaced, improves the working efficiency, blocks the space communication between the interior of the cavity and other mechanisms, avoids the corrosion of a reagent on the driving mechanism, achieves the protection effect on the driving mechanism, and prolongs the service life of the whole device; through the design of the double guide grooves, the torsion of the motor shaft in the rotating process is balanced, the problem of unilateral stressed friction of the feeding mechanism is solved, and the problem of poor precision caused by the swinging of the plunger in the operation process is solved.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the feed mechanism;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view taken along plane A-A of FIG. 3;
fig. 5 is a side view of the present invention;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;
wherein, 1, step motor, 2, advance volume mechanism, 3, opto-coupler, 4, opto-coupler gasket, 5, reagent loader, 6, cavity, 7, advance volume ware installing support, 8, loader adapter, 9, loader support, 201, plunger stick, 202, sealing washer, 203, nut installing support, 204, advance volume uide pin, 205, opto-coupler pin, 206, advance volume mechanism location lasso, 207, advance volume mechanism support, 208, advance volume mechanism mounting nut, 601, reagent output channel, 602, reagent filling channel.
Detailed Description
The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.
As shown in fig. 1-6, the precision feeder of the reagent of the biochemical analyzer comprises a stepping motor 1, a feeding mechanism 2, a cavity 6 and a filling mechanism, wherein the feeding mechanism 2 is matched with a motor shaft of the stepping motor 1 by simultaneously arranging internal and external threads, the cavity 6 and the feeding mechanism are clamped to form an integrated structure, the filling mechanism is communicated with the cavity 6, the cavity is filled with the reagent, and the cavity 6 is filled with the reagent; the feeding mechanism 2 comprises a plunger rod 201, a nut mounting bracket 203, a feeding guide pin 204, a feeding mechanism positioning ferrule 206, a feeding mechanism bracket 207 and a feeding mechanism mounting nut 208, the feeding mechanism 2 is positioned at the motor shaft end of the stepping motor 1 through the feeding mechanism positioning ferrule 206, the inner ring and the outer ring of the feeding mechanism mounting nut 208 are both provided with threads, the inner thread of the plunger rod is matched with a motor shaft of the stepping motor 1, the outer thread of the plunger rod is matched with one end of a nut mounting bracket 203, one end of the plunger rod 201 is fixed at the other end of the nut mounting bracket 203, a feeding mechanism bracket 207 is sleeved outside the nut mounting bracket 203 and the plunger rod 201, the inside of the feeding mechanism bracket 207 is matched with two feeding guide pins 204 fixed on the nut mounting bracket 203 by arranging two guide grooves, the other end of the plunger rod 201 protrudes above the feeding mechanism bracket 207, and the plunger rod 201 penetrates into the cavity 6; one end of the plunger rod 201 protruding out of the feeding mechanism bracket 207 is provided with a sealing ring 202, and the sealing ring 202 is fixed with the feeding mechanism bracket 207.
In addition, this accurate volume meter that advances of biochemical appearance reagent still includes position sensing mechanism, and position sensing mechanism includes opto-coupler 3, opto-coupler gasket 4 and opto-coupler round pin 205, and opto-coupler round pin 205 sets up at nut installing support 203 shell, and its both ends are connected nut installing support 203 and advance volume mechanism support 207 respectively, and opto-coupler 3 passes through opto-coupler gasket 4 and advances volume mechanism support 207 fixed connection.
In this embodiment, the cavity 6 is symmetrically provided with a plurality of through holes, and the through holes are provided with connecting pieces which are respectively connected with the feeding mechanism bracket 207 and the cavity 6, so that the feeding mechanism bracket 207 and the cavity 6 form an integrated mechanism; a reagent output channel 601 which is concentric with the plunger rod 201 is arranged in the middle of the cavity 6, and the plunger rod 201 penetrates into the reagent output channel 601; a reagent filling channel 602 perpendicular to the reagent output channel 601 is formed on the reagent output channel; the filling mechanism comprises a reagent filling device 5, a filling device adapter 8 and a filling device support 9, a through hole is formed in the filling device adapter 8, one end of the through hole is communicated with the reagent filling channel 602 of the cavity 6, the other end of the through hole is communicated with a reagent outlet of the reagent filling device 5, one side of the filling device support 9 is fixed with the stepping motor 1, and the other side of the filling device support is fixed with the reagent filling device 5; the shell of the stepping motor 1 is provided with a measuring device mounting bracket 7, one side of the measuring device mounting bracket 7 is fixed with the stepping motor 1, and the other side is provided with a plurality of threaded holes.
Furthermore, in various embodiments of the present invention, the sealing ring 202 is made of a wear-resistant material, preferably Polyetheretherketone (PEEK), Polytetrafluoroethylene (PTFE), polyurethane, fluorine-containing rubber or silicone rubber material; the plunger rod 201 is made of wear-resistant and high-strength materials, preferably ceramic or metal materials; the cavity 6 is made of metal or nonmetal materials, preferably polyetheretherketone, organic glass, polyformaldehyde, polymethyl methacrylate, polycarbonate or stainless steel materials; the outer circular surface of the plunger rod 201 and the inner circular surface of the sealing ring 202 form a sealing fit, and the fit can be a clearance fit, a zero clearance fit or an interference fit.
The utility model discloses an in the embodiment of rubber or polyurethane material as sealing washer 202 material, the cylindrical surface diameter of 201 excircle of plunger stick compares with the cylindrical surface diameter of the interior circle of sealing washer 202 and equals or bigger, and the cylindrical surface diameter of 201 excircle of plunger stick subtracts the cylindrical surface diameter of the interior circle of sealing washer 202's difference can be 0 ~ 1mm, preferred 0 ~ 0.2 mm.
The utility model discloses an in the embodiment of polyether ether ketone material as sealing washer 202 material, plunger rod 201 excircle face of cylinder diameter and sealing washer 202 interior face of cylinder diameter compare littleer, equal or bigger, and the diameter difference can be-0.05 ~ 0.1mm, preferred 0 ~ 0.08 mm.
In order to understand more clearly the technical solution of the present invention, it will be right below that the working process of the present invention makes brief explanation:
when a motor shaft of the stepping motor 1 rotates forwards, a reagent outlet of the reagent loader 5 is opened, the nut mounting bracket 203 is driven to move downwards by the feeding mechanism mounting nut 208, so that the plunger rod 201 is driven to be drawn out of the cavity 6, the volume of a closed space where the reagent output channel 601 is located is increased, the reagent enters the closed space where the reagent output channel 601 is located from the reagent loading channel 602, and the reagent loading process is completed by the feeding mechanism; when a motor shaft of the stepping motor 1 rotates reversely, a reagent outlet of the reagent loader 5 is closed to prevent the reagent from flowing backwards, the feeding mechanism mounting nut 208 drives the nut mounting bracket 203 to move upwards, so that the plunger rod 201 is driven to move towards the inside of the cavity 6, the volume of a closed space where the reagent output channel 601 is located is reduced, and the reagent is discharged from the closed space where the reagent output channel 601 is located; step motor 1's motor shaft stall when opto-coupler 3 senses opto-coupler round pin 205, and reagent discharge process is accomplished to the precession ware, and the above-mentioned action of circulation repetition realizes the utility model discloses a discharge function is loaded to reagent. The cavity 6 and the feeding mechanism bracket 207 are packaged into a component through a plurality of through holes arranged on the cavity 6, and the feeding mechanism bracket 207 is forced to be tightly matched with the plunger rod 201 through the elasticity of the sealing ring 202 to complete the sealing function when the plunger rod 201 passes through the feeding mechanism bracket 207 to move.
The precise measuring device for the biochemical instrument reagent is provided with the inner threads and the outer threads which are matched with the motor shaft of the stepping motor 1, the plunger rod 201 is driven to move by the rotation of the motor shaft, and the inner threads and the outer threads are arranged simultaneously, so that the relevant coefficient of the movement displacement of the plunger rod 201 is the pitch difference of the inner threads and the outer threads of the feeding mechanism mounting nut 208, the magnitude order of the precise measuring device is finer than that of the precise measuring device which directly uses a lead screw to drive the plunger rod to move in the prior art, and the displacement precision of the; by arranging the reagent filler 5 and the filler adapter 8, the reagent can not flow back to the reagent filler 5 under the action of pressure after entering the cavity 6 from the filler 5; in addition, the whole precision feeder is fixedly installed everywhere by arranging the feeder installing support 7, so that the precision feeder is convenient and portable; the loader is fixed by arranging the loader bracket, so that the loader can be detached and replaced at any time when needing to be cleaned, and the structure is simple and practical; the sealing ring is positioned between the cavity and the support of the feeding mechanism, does not move back and forth along with the plunger rod, is not easy to lose, does not need to be frequently replaced, improves the working efficiency, blocks the space communication between the interior of the cavity and other mechanisms, avoids the corrosion of a reagent on the driving mechanism, achieves the protection effect on the driving mechanism, and prolongs the service life of the whole device; through the design of the double guide grooves, the torsion of the motor shaft in the rotating process is balanced, the problem of unilateral stressed friction of the feeding mechanism is solved, and the problem of poor precision caused by the swinging of the plunger in the operation process is solved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A precision measuring device for biochemical instrument reagent is characterized in that: including step motor (1), advance volume mechanism (2), cavity (6) and filling mechanism, advance volume mechanism (2) through setting up the motor shaft cooperation of internal and external screw thread and step motor (1) simultaneously, cavity (6) and advance volume mechanism card thereby form integrative structure, filling mechanism and cavity (6) intercommunication, wherein pack has the reagent, carry out the packing of reagent to cavity (6).
2. The precision feed meter of claim 1, wherein: the feeding mechanism (2) comprises a plunger rod (201), a nut mounting bracket (203), a feeding guide pin (204), a feeding mechanism positioning ferrule (206), a feeding mechanism bracket (207) and a feeding mechanism mounting nut (208), the feeding mechanism (2) is positioned at the motor shaft end of the stepping motor (1) through the feeding mechanism positioning ferrule (206), the inner ring and the outer ring of the feeding mechanism mounting nut (208) are both provided with threads, the inner threads of the feeding mechanism mounting nut are matched with the motor shaft of the stepping motor (1), the outer threads of the feeding mechanism mounting nut are matched with one end of the nut mounting bracket (203), one end of the plunger rod (201) is fixed at the other end of the nut mounting bracket (203), the feeding mechanism bracket (207) is sleeved at the outer sides of the nut mounting bracket (203) and the plunger rod (201), and the feeding mechanism bracket (207) is internally matched with two feeding guide pins (204) fixed on the nut mounting bracket (203) through two guide grooves, the other end of the plunger rod (201) protrudes above the feeding mechanism bracket (207), and the plunger rod (201) penetrates into the cavity (6).
3. A precision feed meter according to claim 2, wherein: and a sealing ring (202) is arranged at one end of the plunger rod (201) protruding out of the feeding mechanism support (207), and the sealing ring (202) is fixed with the feeding mechanism support (207).
4. A precision feed meter according to claim 3, wherein: the sealing ring (202) is made of polyether ether ketone (PEEK), Polytetrafluoroethylene (PTFE), polyurethane, fluorine-containing rubber or silicon rubber materials in wear-resistant materials; the plunger rod (201) is made of ceramic or metal materials in wear-resistant and high-strength materials; and a sealing fit is formed between the outer circular surface of the plunger rod (201) and the inner circular surface of the sealing ring (202), and the fit is a clearance fit, a zero clearance fit or an interference fit.
5. A precision feed meter according to claim 2, wherein: still include position sensing mechanism, position sensing mechanism includes opto-coupler (3), opto-coupler gasket (4) and opto-coupler round pin (205), opto-coupler round pin (205) set up at nut installing support (203) shell, and its both ends are coupling nut installing support (203) and advance volume mechanism support (207) respectively, opto-coupler (3) are through opto-coupler gasket (4) and advance volume mechanism support (207) fixed connection.
6. A precision feed meter according to claim 2, wherein: the cavity (6) is symmetrically provided with a plurality of through holes, and connecting pieces are arranged in the through holes and are respectively connected with the feeding mechanism bracket (207) and the cavity (6), so that the feeding mechanism bracket (207) and the cavity (6) form an integrated mechanism; a reagent output channel (601) which is concentric with the plunger rod (201) is formed in the middle of the cavity (6), and the plunger rod (201) penetrates into the reagent output channel (601); the reagent output channel (601) is provided with a reagent filling channel (602) vertical to the reagent output channel.
7. The precision feed meter of claim 6, wherein: the loading mechanism comprises a reagent loader (5), a loader adapter (8) and a loader support (9), a through hole is formed in the loader adapter (8), one end of the through hole is communicated with a reagent loading channel (602) of the cavity (6), the other end of the through hole is communicated with a reagent outlet of the reagent loader (5), one side of the loader support (9) is fixed with the stepping motor (1), and the other side of the loader support is fixed with the reagent loader (5).
8. The precision feed meter of claim 1, wherein: the shell of the stepping motor (1) is provided with a measuring device mounting bracket (7), one side of the measuring device mounting bracket (7) is fixed with the stepping motor (1), and the other side of the measuring device mounting bracket is provided with a plurality of threaded holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920842148.8U CN210460974U (en) | 2019-06-05 | 2019-06-05 | Accurate input ware of biochemical appearance reagent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920842148.8U CN210460974U (en) | 2019-06-05 | 2019-06-05 | Accurate input ware of biochemical appearance reagent |
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| Publication Number | Publication Date |
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| CN210460974U true CN210460974U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920842148.8U Expired - Fee Related CN210460974U (en) | 2019-06-05 | 2019-06-05 | Accurate input ware of biochemical appearance reagent |
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| CN (1) | CN210460974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648162A (en) * | 2020-12-30 | 2021-04-13 | 上海三佑科技发展有限公司 | Take accurate measuring pump of position feedback function |
-
2019
- 2019-06-05 CN CN201920842148.8U patent/CN210460974U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648162A (en) * | 2020-12-30 | 2021-04-13 | 上海三佑科技发展有限公司 | Take accurate measuring pump of position feedback function |
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Granted publication date: 20200505 Termination date: 20210605 |