CN112098149B - Liquid sampling, metering and detecting device - Google Patents
Liquid sampling, metering and detecting device Download PDFInfo
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- CN112098149B CN112098149B CN201910522621.9A CN201910522621A CN112098149B CN 112098149 B CN112098149 B CN 112098149B CN 201910522621 A CN201910522621 A CN 201910522621A CN 112098149 B CN112098149 B CN 112098149B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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Abstract
The invention discloses a liquid sampling, metering and detecting device which comprises a metering cylinder and a main piston rod arranged in the metering cylinder, wherein a first cover body is arranged at the top end of the main piston rod, an inner cylinder is coaxially arranged in the metering cylinder, a groove is formed in the bottom of the piston rod along the axial line in the upward direction, the upper part of the inner cylinder is arranged in the groove, an auxiliary piston rod is arranged in the inner cylinder, the auxiliary piston rod sequentially penetrates through the inner cylinder, the main piston rod and the first cover body, and the top end of the auxiliary piston rod is connected with a second cover body. The invention has simple and practical structure, the inner cylinder is additionally arranged in the metering cylinder, the main piston rod is matched with the auxiliary piston rod to ensure that the liquid taking range is accurate to the decimal point and the subsequent decimal point, the first metering guide rail and the second metering guide rail are matched with each other, the high stability can be kept in the use process, the arrangement of the limiting block can eliminate the error in the operation, the measuring accuracy can not be influenced by manual operation, and the accuracy of detection and analysis is improved.
Description
Technical Field
The invention relates to the field of metering detection, in particular to a liquid sampling metering detection device.
Background
When carrying out the detection and analysis to liquid, often need metering device to carry out the ration to liquid and move and get, metering device's the accuracy nature of getting the volume often directly has decided the accuracy of detection and analysis result, current carry out the instrument that the ration sample moved and get to liquid is traditional pipette and liquid-transfering gun mainly, the degree of accuracy can obviously reduce after long-term the use of traditional pipette, and there is operating error in the use, influence and get volume accuracy and analysis accuracy, and liquid-transfering gun structure is complicated, the cost is higher, need often to change and get the volume rifle head and keep the accuracy. There is a need for a metering and detecting device with simple operation, high measuring accuracy and simple and practical structure for liquid sampling.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a liquid sampling and metering device, which solves the above-mentioned problems in the prior art.
In order to achieve the above and other related objects, the present invention provides a liquid sampling, metering and detecting device, which comprises a metering cylinder and a main piston rod arranged inside the metering cylinder, wherein a first cover body is arranged at the top end of the main piston rod, an inner cylinder is coaxially arranged inside the metering cylinder, a groove is upwards arranged at the bottom of the piston rod along an axis, the upper part of the inner cylinder is arranged in the groove, an auxiliary piston rod is arranged in the inner cylinder, the auxiliary piston rod sequentially penetrates through the inner cylinder, the main piston rod and the first cover body, and the top end of the auxiliary piston rod is connected with a second cover body; one side parallel arrangement of measurement section of thick bamboo has first measurement guide rail, the cover is equipped with the slider on the periphery wall of first measurement guide rail, one side of slider is connected with the stopper, the slider drives the stopper along the scale mark slip on the measurement section of thick bamboo when first measurement guide rail is gliding, and fixes on first measurement guide rail through first fixed knob, the upper end cover of first measurement guide rail is equipped with second measurement guide rail, the second measurement guide rail with the bottom of second lid is connected, the second measurement guide rail is equipped with the fixed knob of second with the junction of first measurement guide rail.
Preferably, the upper end of the metering cylinder is provided with a flange, and when the upper end surface of the limiting block is clamped against the flange, the lower end surface of the limiting block is flush with a zero scale mark on the metering cylinder.
Preferably, the second metering guide rail is also provided with scale marks, and the scale value of each number grid on the scale marks is 1/10 of the scale value of each number grid on the metering cylinder.
Preferably, the second metering guide rail extends or retracts along the first metering guide rail, and when the bottom of the second cover body abuts against the upper end of the first cover body, the upper end surface of the first metering guide rail is flush with the zero scale mark on the second metering guide rail.
Preferably, a stop block is connected to the bottom of the first metering rail.
Preferably, the limiting block is an arc-shaped limiting block corresponding to the outer side wall of the metering cylinder in an attaching mode.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple and practical structure, the inner cylinder is additionally arranged in the metering cylinder, the main piston rod is matched with the auxiliary piston rod to ensure that the liquid taking range is accurate to a decimal point back one digit, the first metering guide rail and the second metering guide rail are matched with each other, the high stability can be kept in the use process, the error in the operation can be eliminated by the arrangement of the limiting block, the measuring accuracy is not influenced by manual operation, and the accuracy of detection and analysis is improved.
Drawings
The invention is further described in detail below with reference to the drawings and specific embodiments.
FIG. 1 is a schematic view of an internal structure of a liquid sampling, metering and detecting device according to the present invention;
FIG. 2 is a schematic structural diagram of the limiting block during calibration in the present invention;
FIG. 3 is a schematic structural view of the slider driving the limiting block to slide to a predetermined scale;
FIG. 4 is a schematic structural view of the present invention when the initial liquid extraction is completed by the first metering guide rail;
FIG. 5 is a schematic structural view of the present invention when final tapping is accomplished by a second metering rail;
fig. 6 is a partially enlarged view of the second metering rail of the present invention.
Wherein the reference numerals are specified as follows: the measuring cylinder comprises a measuring cylinder 1, a flange 101, a main piston rod 2, a groove 201, a first cover body 202, an inner cylinder 3, an auxiliary piston rod 4, a second cover body 401, a first measuring guide rail 5, a sliding block 6, a limiting block 7, a first fixing knob 8, a second measuring guide rail 9, a second fixing knob 10 and a stop block 11.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure herein.
It should be understood that the structures, ratios, sizes, etc. shown in the drawings are only used for matching the disclosure of the present disclosure to be understood and read by those skilled in the art, and are not used to limit the practical conditions of the present disclosure, so that the present disclosure has no technical significance, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1-6, the present invention provides a liquid sampling, metering and detecting device, which comprises a metering cylinder 1 and a main piston rod 2 arranged inside the metering cylinder 1, wherein a first cover 202 is arranged at the top end of the main piston rod 2, an inner cylinder 3 is coaxially arranged inside the metering cylinder 1, a groove 201 is formed upwards along an axis at the bottom of the piston rod, the upper part of the inner cylinder 3 is arranged in the groove 201, an auxiliary piston rod 4 is arranged in the inner cylinder 3, the auxiliary piston rod 4 sequentially penetrates through the inner cylinder 3, the main piston rod 2 and the first cover 202, and the top end of the auxiliary piston rod 4 is connected with a second cover 401; one side parallel arrangement of a measurement section of thick bamboo 1 has first measurement guide rail 5, the cover is equipped with slider 6 on the periphery wall of first measurement guide rail 5, one side of slider 6 is connected with stopper 7, slider 6 drives stopper 7 and slides along the scale mark on the measurement section of thick bamboo 1 when first measurement guide rail 5 is gliding, and fix on first measurement guide rail 5 through first fixed knob 8, the upper end cover of first measurement guide rail 5 is equipped with second measurement guide rail 9, second measurement guide rail 9 is connected with the bottom of second lid 401, second measurement guide rail 9 is equipped with second fixed knob 10 with first measurement guide rail 5's junction.
Through the above technical scheme, an inner cylinder 3 has been creatively designed in the inside of measuring cylinder 1, and cooperation inner cylinder 3 has set up deputy piston rod 4 and second lid 401, on the basis of tentatively getting the liquid measurement, can also carry out the more accurate liquid of getting of second time through twitching deputy piston rod 4, simultaneously at the liquid in-process of getting, slider 6 drives stopper 7 and slides along the scale mark on the measuring cylinder 1 all the time, the volume that needs to get liquid can be set for in advance through the fixed route stroke that sets up slider 6, adopt this kind of mode can avoid with the error of visual observation piston and scale mark location, the precision of liquid is got to the ration has improved greatly.
In this embodiment, the upper end of the measuring cylinder 1 is provided with a flange 101, and when the upper end face of the limiting block 7 is clamped against the flange 101, the lower end face of the limiting block is flush with the zero scale mark on the measuring cylinder 1. Because the motion of the limiting block 7 is driven by the sliding block 6 to slide along the measuring cylinder 1, as shown in fig. 2-4, when 3ml of liquid is quantitatively extracted, the first cover 202 abuts against the measuring cylinder 1, the upper end surface of the limiting block 7 abuts against the flange 101 for calibration, then the sliding block 6 slides the limiting block 7 until the lower end surface of the limiting block 7 is flush with the 3ml scale mark on the measuring cylinder 1, then the first fixing knob 8 is locked to fix the sliding block 6 on the first measuring guide rail 5, and then the main piston rod 2 is pulled until the upper end of the limiting block 7 abuts against the flange 101 again, so that the quantitative extraction of 3ml of liquid is completed.
In this embodiment, the second measuring rail 9 is also provided with scale marks, and the scale value of each number lattice on the scale marks is 1/10 of the scale value of each number lattice on the scale marks on the measuring cylinder 1. The scale value that every number check represented on 1 scale mark of a measurement section of thick bamboo is 1ml, and the scale value that every number check represented on the scale mark on the second measurement guide rail 9 is 0.1ml, after accomplishing preliminary liquid of getting and finally getting liquid, can make the scope of getting liquid accurate to the little point back one-digit to numerical value is accurate, has avoided the error that exists in the traditional little check in every number check with the naked eye observation.
In this embodiment, the second metering rail 9 extends or retracts along the first metering rail 5, and when the bottom of the second cover 401 abuts against the upper end of the first cover 202, the upper end surface of the first metering rail 5 is flush with the zero graduation mark on the second metering rail 9. As shown in fig. 5-6, before the second accurate liquid taking, the second cover 401 is always attached to the first cover 202, and the second fixing knob 10 is locked to fix the first measuring rail 5 and the second measuring rail 9, at this time, the upper end surface of the first measuring rail 5 is flush with the zero scale line on the second measuring rail 9, and in the process of the initial liquid taking, the first measuring rail 5 and the second measuring rail 9 move synchronously, and when the second accurate liquid taking is performed, the second fixing knob 10 is opened, then the auxiliary piston rod 4 is pulled, the second measuring rail 9 extends or retracts along the first measuring rail 5, and at this time, it is observed that the upper end surface of the first measuring rail 5 is flush with the scale line on the second measuring rail 9, for example, in fig. 6, the amount of the second accurate liquid taking is 0.7 ml.
In this embodiment, a stopper 11 is connected to the bottom of the first metering rail 5. For limiting the maximum sliding distance of the slider 6 on the first metering rail 5.
In this embodiment, the stopper 7 is the arc stopper that corresponds with the laminating of 1 lateral wall of measuring cylinder. When slider 6 slided along first measurement guide rail 5, drive stopper 7 and slide along the lateral wall of a measurement section of thick bamboo 1, stopper 7 adopts the design of laminating with a measurement section of thick bamboo lateral wall, whether parallel and level of its terminal surface of observation that can be better and scale mark.
In order to improve the function of this embodiment, the measuring cylinder 1 is further communicated with a liquid taking tube and a liquid discharging tube, the liquid taking tube and the liquid discharging tube are internally provided with one-way valves, the two one-way valves adopt the same structure, and when the measuring cylinder is implemented, the opening and closing states of the two one-way valves are opposite, so that negative pressure and positive pressure for extracting liquid and discharging liquid are formed in the measuring cylinder 1.
The working principle is as follows: before quantitative liquid taking, correction is needed, the first cover body 202 is abutted against the upper end of the metering cylinder 1, the second cover body 401 is abutted against the first cover body 202, the second fixing knob 10 is locked, then the sliding block 6 slides along the first metering guide rail 5 until the upper end of the limiting block 7 is abutted against the flange 101, at the moment, the upper end face of the first metering guide rail 5 is flush with a zero scale mark on the second metering guide rail 9, and the lower end face of the limiting block 7 is flush with the zero scale mark on the metering cylinder 1, so that the correction is completed; when liquid is taken for the first time, the sliding block 6 is slid until the lower end face of the limiting block 7 is flush with the preset value scale mark on the metering cylinder 1, the first fixing knob 8 is locked, the main piston rod 2 is pulled until the upper end of the limiting block 7 is attached to the flange 101 again, and the liquid taking for the first time is finished; when liquid is taken for the second time, the second fixing knob 10 is opened, the auxiliary piston rod 4 is pulled, the second metering guide rail 9 is driven to extend into along the first metering guide rail 5 until the upper end face of the first metering guide rail 5 is flush with the scale marks on the second metering guide rail 9, and thus the liquid is taken for the second time.
In conclusion, the invention has simple and practical structure, can ensure that the liquid taking range is accurate to the decimal point back-digit number, can keep high stability in the using process, can eliminate the error in the operation, ensures that the measuring precision is not influenced by manual operation, and improves the accuracy of detection and analysis. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The liquid sampling, metering and detecting device is characterized by comprising a metering cylinder (1) and a main piston rod (2) arranged in the metering cylinder (1), wherein a first cover body (202) is arranged at the top end of the main piston rod (2), an inner cylinder (3) is coaxially arranged in the metering cylinder (1), a groove (201) is formed in the bottom of the piston rod upwards along the axis, the upper part of the inner cylinder (3) is arranged in the groove (201), an auxiliary piston rod (4) is arranged in the inner cylinder (3), the auxiliary piston rod (4) sequentially penetrates through the inner cylinder (3), the main piston rod (2) and the first cover body (202), and the top end of the auxiliary piston rod is connected with a second cover body (401); one side parallel arrangement of a measurement section of thick bamboo (1) has first measurement guide rail (5), the cover is equipped with slider (6) on the periphery wall of first measurement guide rail (5), one side of slider (6) is connected with stopper (7), slider (6) drive stopper (7) along first measurement guide rail (5) gliding while and slide along the scale mark on a measurement section of thick bamboo (1), and fix on first measurement guide rail (5) through first fixed knob (8), the upper end cover of first measurement guide rail (5) is equipped with second measurement guide rail (9), second measurement guide rail (9) with the bottom of second lid (401) is connected, second measurement guide rail (9) are equipped with second fixed knob (10) with the junction of first measurement guide rail (5).
2. A liquid sampling metering testing device as claimed in claim 1, wherein: the upper end of the measuring cylinder (1) is provided with a flange (101), and when the upper end surface of the limiting block (7) is clamped against the flange (101), the lower end surface of the limiting block is parallel and level with zero scale marks on the measuring cylinder (1).
3. A liquid sampling metering testing device as claimed in claim 2, wherein: the second metering guide rail (9) is also provided with scale marks, and the scale value of each number lattice on the scale marks is 1/10 of the scale value of each number lattice on the scale marks on the metering cylinder (1).
4. A liquid sampling metering device according to claim 3 wherein: the second metering guide rail (9) extends or retracts along the first metering guide rail (5), and when the bottom of the second cover body (401) is attached to the upper end of the first cover body (202), the upper end face of the first metering guide rail (5) is flush with a zero scale mark on the second metering guide rail (9).
5. A liquid sampling metering device according to claim 1 wherein: the bottom of the first metering guide rail (5) is connected with a stop block (11).
6. A liquid sampling metering device according to claim 1 wherein: the limiting block (7) is an arc-shaped limiting block which corresponds to the outer side wall of the metering cylinder (1) in an attaching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522621.9A CN112098149B (en) | 2019-06-17 | 2019-06-17 | Liquid sampling, metering and detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522621.9A CN112098149B (en) | 2019-06-17 | 2019-06-17 | Liquid sampling, metering and detecting device |
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| CN112098149A CN112098149A (en) | 2020-12-18 |
| CN112098149B true CN112098149B (en) | 2022-07-19 |
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| CN201910522621.9A Active CN112098149B (en) | 2019-06-17 | 2019-06-17 | Liquid sampling, metering and detecting device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112872295A (en) * | 2021-02-23 | 2021-06-01 | 共享智能铸造产业创新中心有限公司 | Liquid material adding device and 3D printer |
| CN113739885A (en) * | 2021-09-03 | 2021-12-03 | 深圳市三也生物科技有限公司 | Soft capsule liquid precise filling weighing device and weighing method |
| CN113933440A (en) * | 2021-09-30 | 2022-01-14 | 海南电网有限责任公司海南输变电检修分公司 | Oil gas sampling needle prevents spouting instrument |
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| CN102179269A (en) * | 2011-04-11 | 2011-09-14 | 深圳市博卡生物技术有限公司 | Precision finely adjustable liquid transfer device |
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| CN203816658U (en) * | 2014-04-23 | 2014-09-10 | 张建明 | Quantitative pipettor |
| CN207051040U (en) * | 2017-07-13 | 2018-02-27 | 海南聚能科技创新研究院有限公司 | A kind of two-stage metered shot device |
| CN107764596A (en) * | 2016-08-17 | 2018-03-06 | 陈蕾 | Sampling instrument during for detecting insulating oil |
| CN108204907A (en) * | 2017-12-29 | 2018-06-26 | 孙丽敏 | A kind of novel pharmacological experiment sampler |
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2019
- 2019-06-17 CN CN201910522621.9A patent/CN112098149B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057174A (en) * | 1975-11-07 | 1977-11-08 | Trujillo John J | Measuring liquid dispenser with flat top |
| CN102179269A (en) * | 2011-04-11 | 2011-09-14 | 深圳市博卡生物技术有限公司 | Precision finely adjustable liquid transfer device |
| CN103411798A (en) * | 2013-08-12 | 2013-11-27 | 国家电网公司 | Oil sample injector for transformer |
| CN203816658U (en) * | 2014-04-23 | 2014-09-10 | 张建明 | Quantitative pipettor |
| CN107764596A (en) * | 2016-08-17 | 2018-03-06 | 陈蕾 | Sampling instrument during for detecting insulating oil |
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| CN108204907A (en) * | 2017-12-29 | 2018-06-26 | 孙丽敏 | A kind of novel pharmacological experiment sampler |
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