CN215261968U - Capacitance type liquid level detection reagent needle - Google Patents
Capacitance type liquid level detection reagent needle Download PDFInfo
- Publication number
- CN215261968U CN215261968U CN202121436589.1U CN202121436589U CN215261968U CN 215261968 U CN215261968 U CN 215261968U CN 202121436589 U CN202121436589 U CN 202121436589U CN 215261968 U CN215261968 U CN 215261968U
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- reagent needle
- reagent
- cover
- needle
- liquid level
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an inspection equipment technical field, concretely relates to capacitanc liquid level detection reagent needle, including wire (2), the fixed cover of reagent needle (3), reagent needle cover (4) and reagent needle (5), reagent needle (5) link together with the fixed cover of reagent needle (3), constitute an electrode, and reagent needle cover (4) regard as another electrode. And an insulating material is filled between the two electrodes to form a sampling capacitor with stable medium. In addition, the distance between the two electrodes can be relatively close, and the coaxial cable can be easily connected with the detection circuit, so that the signal interference is effectively avoided, and the detection precision and reliability are greatly improved.
Description
Technical Field
The utility model relates to an inspection equipment technical field, concretely relates to capacitanc liquid level detection reagent needle.
Background
The liquid level detection technology is an important component of various automatic biochemical detection and analysis instruments. These instruments and devices require reagent addition work during operation. When reagent is added, the electric mechanism drives the reagent needle to rapidly descend to gradually approach the liquid level of the reagent to be taken, when the reagent needle contacts the liquid level of the reagent, judgment can be rapidly made, and the depth of the reagent needle stretching below the liquid level of the reagent is controlled according to the reagent adding amount. Has the following advantages: the hanging drops are reduced to the maximum extent. And secondly, when the reagent residual is insufficient, timely alarming is carried out, and detection errors caused by insufficient residual are avoided. The capacitance type liquid level detection technology is the most widely applied method due to the characteristics of simple principle, low cost, easy realization and the like.
The existing capacitive liquid level detection reagent needle is complex in structural design, so that a used cable is long, the problems of poor anti-interference performance, large influence of space environment, low consistency and reliability and the like exist, and the capacitive liquid level detection reagent needle is not suitable for application occasions with high detection precision. The invention provides the capacitance type liquid level detection reagent needle which is simple in structure, strong in anti-interference performance, high in reliability and high in measurement precision.
SUMMERY OF THE UTILITY MODEL
In order to solve the deficiencies in the above technical problem, the utility model provides a technical scheme as follows:
the utility model provides a capacitanc liquid level detection reagent needle, includes wire (2), the fixed cover of reagent needle (3), reagent needle cover (4) and reagent needle (5), the fixed cover of reagent needle (3) and reagent needle cover (4) are connected respectively to the wire, reagent needle cover (4) cover is in the outside of reagent needle (5), the fixed cover of reagent needle (3) are located the top of reagent needle (5), its characterized in that is provided with insulating layer (6) between reagent needle (5) and reagent needle cover (4), be provided with insulating cover (1) between the fixed cover of reagent needle (3) and reagent needle cover (4).
Preferably, the reagent needle sleeve (4) is made of stainless steel.
Preferably, the reagent needle (5) is made of stainless steel.
More preferably, the conductor (2) is a coaxial cable.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses simple structure, part size machining precision is controllable when the production preparation, the assembly is accomplished after the rigidity between the individual part, has guaranteed its uniformity, and the interval between the fixed cover of reagent needle (3) and reagent needle cover (4) is very little, and it is associative with detection circuitry with coaxial cable very easily, the effectual signal interference of having avoided has improved the precision and the reliability that detect greatly.
Drawings
FIG. 1 is a schematic perspective view of a capacitive liquid level detection reagent needle;
1. an insulating sleeve 2, a lead 3, a reagent needle fixing sleeve 4, a reagent needle sleeve 5 and a reagent needle
FIG. 2 is a cross-sectional view of a capacitive liquid level sensing reagent needle;
FIG. 3 is an enlarged view of view A;
6. insulating layer
FIG. 4 is a schematic view of the three-dimensional structure of the reagent needle fixing sleeve
3-1, reagent needle mounting hole 3-2 and positioning pin hole
Detailed Description
The invention will be further described with reference to the accompanying drawings:
the utility model provides a capacitanc liquid level detection reagent needle, includes wire (2), the fixed cover of reagent needle (3), reagent needle cover (4) and reagent needle (5), the fixed cover of reagent needle (3) and reagent needle cover (4) are connected respectively to the wire, reagent needle cover (4) cover is in the outside of reagent needle (5), the fixed cover of reagent needle (3) are located the top of reagent needle (5), its characterized in that is provided with insulating layer (6) between reagent needle (5) and reagent needle cover (4), be provided with insulating cover (1) between the fixed cover of reagent needle (3) and reagent needle cover (4).
The reagent needle (5) is made of metal, preferably stainless steel.
The reagent needle sleeve (4) is made of metal, preferably stainless steel. The reagent needle passes through the middle of the reagent needle sleeve (4). An insulating layer (6) is arranged between the reagent needle (5) and the reagent needle sleeve (4), and the reagent needle sleeve (4) are directly isolated from each other by the insulating layer (6) and cannot be contacted together.
The insulating sleeve (1) is arranged on the reagent needle (5), is positioned above the reagent needle sleeve (4) and is leaned against the top surface of the reagent needle sleeve (4).
The reagent needle fixing sleeve (3) is arranged on the insulating sleeve (1), and the reagent needle (5) penetrates through the middle of the reagent needle mounting hole (3-1) of the reagent needle fixing sleeve (3) and is fixedly connected with the reagent needle fixing sleeve (3). In addition, the reagent needle fixing sleeve (3) is provided with a positioning pin hole (3-2) which can be provided with a positioning pin to lock the relative position of the reagent needle fixing sleeve (3) and the reagent needle (5). The positioning pin arranged in the positioning pin hole is made of metal and is an electric good conductor. The reagent needle sleeve (4) is isolated from the reagent needle fixing sleeve (3) through the insulating sleeve (1), and the reagent needle sleeve (4) is isolated from the reagent needle (5) through the insulating layer (6). The reagent needle (5) and the reagent needle fixing sleeve (3) are communicated.
Two lead wires (2) are provided, one is connected with the reagent needle fixing sleeve (3), and the other is connected with the reagent needle sleeve (4). The other ends of the two leads (2) are connected to the circuit board. The reagent needle fixing sleeve (3) and the reagent needle (5) are connected into a whole and are mutually communicated to be used as an electrode, and the reagent needle sleeve (4) is not communicated with the reagent needle fixing sleeve (3) and the reagent needle (5) and can be used as another electrode. The two electrodes form a sampling capacitor with stable medium.
The utility model discloses a use:
during the use, reagent needle (5) descend rapidly under the drive of sample needle application of sample arm, and when being close to the liquid level in the reagent box, the jump takes place for the electric capacity between reagent needle (5) and the fixed cover of reagent needle (3), detects the liquid level, then according to reagent needle length that descends as the reference, realizes the tracking of liquid level detection and the tracking liquid level change condition through detecting this sample capacitance's change to accomplish the absorption of reagent.
Claims (5)
1. The utility model provides a capacitanc liquid level detection reagent needle, includes wire (2), the fixed cover of reagent needle (3), reagent needle cover (4) and reagent needle (5), fixed cover of reagent needle (3) and reagent needle cover (4) are being connected respectively to wire (2), reagent needle cover (4) cover is in the outside of reagent needle (5), the fixed cover of reagent needle (3) is located the top of reagent needle (5), be provided with insulating layer (6) between its characterized in that reagent needle (5) and reagent needle cover (4), be provided with insulating cover (1) between the fixed cover of reagent needle (3) and reagent needle cover (4).
2. The capacitive liquid level detection reagent needle as claimed in claim 1, further characterized in that the reagent needle fixing sleeve (3) is provided with a positioning pin hole (3-2).
3. The capacitive liquid level detection reagent needle as claimed in claim 1, wherein the reagent needle fixing sleeve (3) and the reagent needle (5) are connected together and conducted with each other.
4. A capacitive liquid level detection reagent needle as claimed in claim 1, further characterised in that the reagent needle sheath (4) is non-conductive to the reagent needle (5).
5. A capacitance type liquid level detection reagent needle as claimed in claim 1, wherein a sampling capacitance with stable medium is formed between the reagent needle (5) and the reagent needle fixing sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436589.1U CN215261968U (en) | 2021-06-28 | 2021-06-28 | Capacitance type liquid level detection reagent needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436589.1U CN215261968U (en) | 2021-06-28 | 2021-06-28 | Capacitance type liquid level detection reagent needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215261968U true CN215261968U (en) | 2021-12-21 |
Family
ID=79484044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121436589.1U Active CN215261968U (en) | 2021-06-28 | 2021-06-28 | Capacitance type liquid level detection reagent needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215261968U (en) |
-
2021
- 2021-06-28 CN CN202121436589.1U patent/CN215261968U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220907 Address after: No. 2512, No. 555, Yinhai Road, Laishan District, Yantai City, Shandong Province, 264000 Patentee after: Yantai Shengfeng Medical Technology Co.,Ltd. Address before: 264000 room 410, science and technology entrepreneurship building, No. 133-1, Yingchun street, Laishan District, Yantai City, Shandong Province Patentee before: Yantai xindawei Medical Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |