CN220542181U - Low-cost large-thread capacitive liquid level sensor - Google Patents
Low-cost large-thread capacitive liquid level sensor Download PDFInfo
- Publication number
- CN220542181U CN220542181U CN202322231709.XU CN202322231709U CN220542181U CN 220542181 U CN220542181 U CN 220542181U CN 202322231709 U CN202322231709 U CN 202322231709U CN 220542181 U CN220542181 U CN 220542181U
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- liquid level
- main joint
- level sensor
- thread
- capacitive
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- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000004677 Nylon Substances 0.000 claims abstract description 7
- 229920001778 nylon Polymers 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a low-cost large-thread capacitive liquid level sensor, which comprises a main joint, wherein the main joint is provided with a main joint; the main joint: the inner part of the through hole is internally provided with a sealing sleeve, the inner part of the sealing sleeve is provided with an inner core, the outer cambered surface of the inner core is provided with a negative electrode, the outer cambered surface of the negative electrode is provided with a positive electrode which is uniformly distributed, the outer part of the whole body formed by the inner core, the negative electrode and the positive electrode is provided with an outer protection pipe, the upper end of the main joint is in threaded connection with a shell, and the lower end of the outer cambered surface of the main joint is provided with a thread groove; wherein: the low-cost large-thread capacitive liquid level sensor comprises a shell, and is characterized by further comprising a capacitive sensing chip, wherein the capacitive sensing chip is arranged in the shell, the output ends of a negative electrode and a positive electrode are electrically connected with the input end of the capacitive sensing chip, the low-cost large-thread capacitive liquid level sensor is directly connected with a measuring hole of a container by using a nylon main joint with a larger diameter, and the low-cost large-thread capacitive liquid level sensor is simple in structure and greatly reduces the weight and the production cost of the liquid level sensor.
Description
Technical Field
The utility model relates to the technical field of liquid level sensors, in particular to a low-cost large-thread capacitive liquid level sensor.
Background
In modern industrial production, instruments and meters are important tools for detecting the running condition of equipment, and level gauges are important as instruments for measuring the level of a liquid medium in a container. The current liquid level meter types are mainly divided into magnetic levitation type, pressure type, ultrasonic type and the like, and most of the liquid level meters have the defects of insufficient metering precision, complex structure, high price and the like, and can not meet the requirements of modern industrial production. Thus, in recent years, a new type of capacitive gauge has been developed. The capacitive liquid level meter works by converting the position change of the measured object into capacitance for measurement. The liquid level meter has the advantages of high resolution, quick dynamic response and the like. Along with the continuous popularization of capacitance type liquid level meter, the demand of measuring the liquid level of solution appears under low pressure environment (< 2.5 MPa), current capacitance type liquid level sensor is generally made by stainless steel casing and detection subassembly, and stainless steel casing has good corrosion resistance, long service life, when the detection hole of on-the-spot container is great, need select to use great connector to connect, and then the stainless steel material that needs is more, therefore sensor casing's volume and weight are all great, and the cost that produces simultaneously is also higher.
Disclosure of Invention
The utility model aims to overcome the existing defects, provides the low-cost large-thread capacitive liquid level sensor, uses the nylon main joint with larger diameter to be directly connected with the measuring hole of the container, has simple structure, light weight and low production cost, and can effectively solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a low-cost large-thread capacitive liquid level sensor comprises a main joint;
the main joint: the inner part of the through hole is internally provided with a sealing sleeve, the inner part of the sealing sleeve is provided with an inner core, the outer cambered surface of the inner core is provided with a negative electrode, the outer cambered surface of the negative electrode is provided with a positive electrode which is uniformly distributed, the outer part of the whole body formed by the inner core, the negative electrode and the positive electrode is provided with an outer protection pipe, the upper end of the main joint is in threaded connection with a shell, and the lower end of the outer cambered surface of the main joint is provided with a thread groove;
wherein: the liquid level sensor comprises a shell, and is characterized by further comprising a capacitive sensing chip, wherein the capacitive sensing chip is arranged in the shell, the output ends of the negative electrode and the positive electrode are electrically connected with the input end of the capacitive sensing chip, and the nylon main joint with a larger diameter is directly connected with the measuring hole of the container.
Furthermore, the main joint is a nylon Long Zhu joint, so that the production cost is low.
Further, the upper end threaded connection in the main joint has last compress tightly the silk, and the internally mounted of main joint has the packing ring, and the packing ring is located between last compress tightly silk and the seal cover, provides down force for the seal cover, makes things convenient for the location of seal cover.
Furthermore, the lower end of the sealing sleeve is conical, so that the sealing at the joint is convenient.
Furthermore, the sealing sleeve is a fluororubber sealing sleeve, has excellent elasticity and acid and alkali resistance and good sealing effect.
Further, the inner core is a glass fiber inner core, the diameter of the inner core is eight millimeters, the corrosion resistance is good, the mechanical strength is high, and the installation is convenient.
Furthermore, the outer protective tube is a PFA outer protective tube, and good chemical stability and corrosion resistance can provide good protection.
Compared with the prior art, the utility model has the beneficial effects that: the low-cost large-thread capacitive liquid level sensor has the following advantages:
the screw thread groove has been seted up to the lower extreme of main joint extrados, and during the use is with the whole inserting inside the container that inner core, negative electrode, positive electrode and outer pillar formed, utilizes the screw thread groove to be connected with the screw thread of container detection mouth and realizes fixing the main joint, is equipped with negative electrode and positive electrode on the inner core, forms a electric capacity between negative electrode and positive electrode, along with the lift of the liquid level of being surveyed in the container, the electric capacity between negative electrode and the positive electrode takes place corresponding change, the main joint is the Long Zhu joint of ni, low in production cost, the inside upper end threaded connection of main joint has last clamp wire, and the internally mounted of main joint has the packing ring, and the packing ring is located between clamp wire and the seal cover, goes up clamp wire and the effort that the packing ring provided the push down for the seal cover, the lower extreme of seal cover is the toper, makes things convenient for seal cover and main joint's crowding tight seal, uses the nylon main joint of great diameter to carry out direct connection with the measuring aperture of container, and simple structure has reduced level sensor's weight and manufacturing cost by a wide margin.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is an enlarged schematic view of the structure of the present utility model at A;
fig. 4 is a schematic structural view of the inner core of the present utility model.
In the figure: 1 a shell, 2 upper compression wires, 3 washers, 4 sealing sleeves, 5 main joints, 6 outer protective tubes, 7 inner cores, 8 negative electrodes, 9 positive electrodes, 10 capacitive sensing chips and 11 thread grooves.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, the present embodiment provides a technical solution: a low-cost large-thread capacitive liquid level sensor, which comprises a main joint 5;
main joint 5: the sealing sleeve 4 is arranged in the through hole in the sealing sleeve 4, the sealing sleeve 4 is convenient for sealing between the inner core 7 and the main joint 5, the negative electrode 8 is arranged on the outer cambered surface of the inner core 7, the positive electrode 9 which is uniformly distributed is arranged on the outer cambered surface of the negative electrode 8, the outer protective tube 6 is arranged outside the whole body formed by the inner core 7, the negative electrode 8 and the positive electrode 9, the shell 1 is connected with the upper end of the main joint 5 in a threaded manner, the shell 1 protects parts in the interior, the lower end of the outer cambered surface of the main joint 5 is provided with a threaded groove 11, the whole body formed by the inner core 7, the negative electrode 8, the positive electrode 9 and the outer protective tube 6 is inserted into a container in use, the fixing of the main joint 5 is realized by connecting the threaded groove 11 with the threads of a container detection port, the negative electrode 8 and the positive electrode 9 are arranged on the inner core 7, a capacitor is formed between the negative electrode 8 and the positive electrode 9, along with the lifting of the liquid level of the liquid to be measured in the container, the capacitance value between the negative electrode 8 and the positive electrode 9 correspondingly changes, the main joint 5 is a nylon main joint, the production cost is low, the upper end of the inside of the main joint 5 is in threaded connection with the upper compression wire 2, the gasket 3 is arranged in the main joint 5, the gasket 3 is positioned between the upper compression wire 2 and the sealing sleeve 4, the upper compression wire 2 and the gasket 3 provide downward pressing acting force for the sealing sleeve 4, the lower end of the sealing sleeve 4 is conical, the sealing sleeve 4 and the main joint 5 are convenient to press tightly and seal, the sealing sleeve 4 is a fluororubber sealing sleeve, the elasticity is excellent, the acid and alkali resistance is good, the inner core 7 is a glass fiber inner core, the corrosion resistance is good, the mechanical strength is high, the diameter of the inner core 7 is eight millimeters, the diameter is small, the installation is convenient, the outer protection tube 6 is a PFA outer protection tube, and the chemical stability and the corrosion resistance are good;
wherein: the liquid level sensor comprises a shell 1, and is characterized by further comprising a capacitive sensing chip 10, wherein the capacitive sensing chip 10 is arranged in the shell 1, the output ends of the negative electrode 8 and the positive electrode 9 are electrically connected with the input end of the capacitive sensing chip 10, and the capacitive sensing chip 10 acquires a capacitance value in real time and converts the capacitance value into a liquid level height signal for output through an internal algorithm.
The working principle of the low-cost large-thread capacitive liquid level sensor provided by the utility model is as follows: when the liquid level sensor is used, the whole formed by the inner core 7, the negative electrode 8, the positive electrode 9 and the outer protection tube 6 is inserted into a container, the main joint 5 is fixed by connecting the thread groove 11 with the thread of the container detection port, the negative electrode 8 and the positive electrode 9 are arranged on the inner core 7, a capacitor is formed between the negative electrode 8 and the positive electrode 9, the capacitance value between the negative electrode 8 and the positive electrode 9 correspondingly changes along with the rise and fall of the liquid level to be detected in the container, and the capacitance value is acquired in real time by the capacitive sensor chip 10 and then is converted into a liquid level height signal output through an internal algorithm.
It should be noted that the capacitive sensor chip 10 disclosed in the above embodiment may be freely configured according to the practical application scenario, and the capacitive sensor chip 10 may be a capacitive sensor chip with the model number MDC 04.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (7)
1. A low-cost large-thread capacitive liquid level sensor is characterized in that: comprising a main joint (5);
main joint (5): the inside of the through hole inside the sealing sleeve is provided with the sealing sleeve (4), the inside of the sealing sleeve (4) is provided with an inner core (7), the outer cambered surface of the inner core (7) is provided with a negative electrode (8), the outer cambered surface of the negative electrode (8) is provided with a positive electrode (9) which is uniformly distributed, the outer part of the whole body formed by the inner core (7), the negative electrode (8) and the positive electrode (9) is provided with an outer protection pipe (6), the upper end of the main joint (5) is in threaded connection with the shell (1), and the lower end of the outer cambered surface of the main joint (5) is provided with a threaded groove (11);
wherein: the capacitive sensor comprises a shell (1), and is characterized by further comprising a capacitive sensing chip (10), wherein the capacitive sensing chip (10) is arranged in the shell (1), and output ends of the negative electrode (8) and the positive electrode (9) are electrically connected with input ends of the capacitive sensing chip (10).
2. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the main joint (5) is a nylon main joint.
3. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the upper end thread inside the main joint (5) is connected with an upper compression wire (2), a gasket (3) is arranged inside the main joint (5), and the gasket (3) is positioned between the upper compression wire (2) and the sealing sleeve (4).
4. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the lower end of the sealing sleeve (4) is conical.
5. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the sealing sleeve (4) is a fluororubber sealing sleeve.
6. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the inner core (7) is a glass fiber inner core, and the diameter of the inner core (7) is eight millimeters.
7. A low cost, high thread capacitive liquid level sensor as claimed in claim 1 wherein: the outer protective tube (6) is a PFA outer protective tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231709.XU CN220542181U (en) | 2023-08-18 | 2023-08-18 | Low-cost large-thread capacitive liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322231709.XU CN220542181U (en) | 2023-08-18 | 2023-08-18 | Low-cost large-thread capacitive liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220542181U true CN220542181U (en) | 2024-02-27 |
Family
ID=89974423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322231709.XU Active CN220542181U (en) | 2023-08-18 | 2023-08-18 | Low-cost large-thread capacitive liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220542181U (en) |
-
2023
- 2023-08-18 CN CN202322231709.XU patent/CN220542181U/en active Active
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