CN214308995U - Liquid level measuring instrument - Google Patents
Liquid level measuring instrument Download PDFInfo
- Publication number
- CN214308995U CN214308995U CN202120870020.XU CN202120870020U CN214308995U CN 214308995 U CN214308995 U CN 214308995U CN 202120870020 U CN202120870020 U CN 202120870020U CN 214308995 U CN214308995 U CN 214308995U
- Authority
- CN
- China
- Prior art keywords
- measuring cylinder
- liquid level
- knocking
- flange
- vibration pickup
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model belongs to the technical field of measure, especially, relate to a liquid level measuring instrument. The liquid level measuring instrument is a continuous change instrument for dynamically measuring the liquid level in the storage tank in real time and detecting the liquid level. Comprises a measuring cylinder; the measuring cylinder is connected with the storage tank to be measured through a flange and a pipeline, so that the measuring cylinder and the storage tank to be measured form a communicating vessel. A plurality of knocking devices are arranged on one side of the measuring cylinder from low to high, and a plurality of vibration pickup sensors are arranged on the other side of the measuring cylinder; the knocking device and the vibration pickup sensor form a plurality of detection groups; each detection group comprises a knocking device and a vibration pickup sensor which are corresponding in position; the vibration pickup sensor is connected with the data acquisition module, and the data acquisition module transmits the calculated result to the user DCS control system.
Description
Technical Field
The utility model belongs to the technical field of measure, especially, relate to a liquid level measuring instrument.
Background
Typically, critical elements of a level gauge all need to be in contact with the liquid medium being measured. For example: key elements of a glass plate level gauge, such as the sight glass and window seal assembly. In contact with the liquid medium being measured, where the window glass is susceptible to damage and leakage, replacement of spare parts is periodically checked.
Quartz glass tube a critical component of a quartz glass tube level gauge is also susceptible to damage and leakage when in contact with the liquid medium being measured, requiring periodic inspection and replacement of spare parts. Key elements of the magnetic float level gauge: when the magnetic float in the cavity is in contact with the measured liquid medium, the magnetic float is easy to damage, and the replacement of spare parts is required to be regularly checked. In most meters, once the critical elements are damaged, the whole meter is out of work or even dangerous.
Disclosure of Invention
The utility model discloses just to the defect that prior art exists, provide a liquid level measuring instrument.
In order to achieve the purpose, the utility model adopts the following technical proposal that the liquid level measuring instrument comprises a measuring cylinder; the device is characterized in that the measuring cylinder is connected with a measured storage tank through a flange and a pipeline, so that the measuring cylinder and the measured storage tank form a communicating vessel;
a plurality of knocking devices are arranged on one side of the measuring cylinder from low to high, and a plurality of vibration pickup sensors are arranged on the other side of the measuring cylinder; the knocking device and the vibration pickup sensor form a plurality of detection groups; each detection group comprises a knocking device and a vibration pickup sensor which are corresponding in position; the vibration pickup sensor is connected with the data acquisition module, and the data acquisition module transmits the calculated result to the user DCS control system.
According to the first scheme, the knocking device comprises a steering engine and a rudder arm driven by the steering engine; the measuring cylinder is used for knocking the wall of the measuring cylinder to generate vibration.
According to the scheme II, the knocking device adopts a knocking electromagnet; the measuring cylinder is used for knocking the wall of the measuring cylinder to generate vibration.
Further, the plurality of knock sensors are arranged in a collinear manner, and the plurality of vibration pickup sensors are arranged in a collinear manner.
Furthermore, a first flange is arranged on the side wall of the measuring cylinder, a second flange (the height of the first flange is consistent with that of the second flange) is arranged at the position, opposite to the position of the flange, of the measured storage tank, the first flange is connected with the second flange through a pipeline, and the measuring cylinder is communicated with the measured storage tank through the pipeline and the flange after the first flange is connected with the second flange.
Furthermore, a primary valve is arranged on the pipeline.
Further, a sealing head is arranged at the top of the measuring cylinder.
Further, the bottom of the measuring cylinder is provided with a discharge valve.
Further, the measuring cylinder is made of stainless steel.
The liquid level measuring method using the liquid level measuring instrument comprises the following steps of:
step 1, opening a primary valve, enabling liquid to enter a measuring cylinder from a measured storage tank, and enabling the measured storage tank and the measuring cylinder to form a communicating vessel; the signal pickup positions of the plurality of vibration pickup sensors are sequentially defined as a first point position, a second point position and an … nth point position from bottom to top.
And 2, in the liquid rising process, when the liquid level is lower than the first point position or no liquid medium exists in the first point position, starting the knocking device corresponding to the first point position.
And 3, correspondingly, the vibration pickup sensor receives the vibration frequency change and transmits the electric signal to the control system through the data acquisition module, and the control system judges whether the electric signal is in the threshold range of the corresponding point position or not according to the electric signal.
If the liquid level is not within the range, the liquid level does not reach the height corresponding to the first point.
And 5, receiving the electric signal by the vibration pickup sensor at the second point location, transmitting the electric signal to the control system, and judging whether the electric signal is in the threshold range of the corresponding point location.
If the liquid level is not in the range, the liquid level is not raised to the second point position height; it means that the liquid level is between the first point location and the second point location.
If the liquid level is within the range, the liquid level is indicated to pass through the second point location, the next round of repeated operation is needed to be carried out continuously until the liquid level is judged not to be within the threshold range of the point location, and the height of the output liquid level is between the height of the point location and the height of the adjacent low point location.
In the falling process after the liquid level rises to a certain height, when the falling position of the liquid level is determined, the judgment method is the same as that when the liquid level rises, and the method comprises the following steps: and starting the knocking device and the vibration pickup sensor at the highest point position closest to the liquid level height, and judging whether the signal is in the threshold range.
If the liquid level is within the range, the liquid level is higher than the highest point.
If the current time is not within the range, stopping knocking; starting a knocking device of the secondary height point location to knock, and judging whether a secondary height point location signal is in a threshold range; if the liquid level is within the range, the liquid level height is positioned between the secondary high point positions at the highest point; if the current time is not within the range, carrying out the next round of repeated operation; until the liquid level is found to stay at the final position.
Compared with the prior art the utility model discloses beneficial effect.
The utility model dynamically measures the liquid level in the storage tank in real time and detects the continuous change of the liquid level; the key element does not need to be in contact with a measured liquid medium, so that the safety and the economy are improved, zero leakage is realized, maintenance is not needed, spare parts do not need to be replaced, the application prospect is wide, and the service life is prolonged.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
FIG. 1 is the schematic view of the structure of the liquid level measuring instrument of the present invention.
In the figure, 1 is a seal head, 2 is a measuring cylinder, 3 is a vibration pickup sensor, 4 is a knocking device, 5 is a liquid medium, 6 is a discharge valve, 7 is a side flange, 8 is a primary valve, 9 is a measured storage tank, and 10 is an integrated module.
Detailed Description
As shown in fig. 1, the utility model discloses utilize the linker principle to introduce the measured liquid medium in the measuring cylinder.
The cross section of the measuring cylinder is a square tube, the measuring cylinder is connected with the measured storage tank through a flange, the seal head is arranged above the measuring cylinder, the discharge valve is arranged below the measuring cylinder, and the whole measuring cylinder (comprising the upper seal head, the lower discharge valve and the side flange) is made of stainless steel metal.
The four side surfaces of the measuring cylinder can be parallelly and alternately provided with the knocking devices and the vibration pickup sensors, the point positions and the quantity of the knocking devices and the vibration pickup sensors can be determined according to actual needs, the knocking devices and the vibration pickup sensors are connected with the integrated module, and the integrated module transmits the calculated result to the user DCS control system to realize liquid level measurement.
The knocking device is composed of a steering engine (with adjustable action frequency) and a metal rudder arm and is responsible for knocking the measuring cylinder wall to generate vibration. Which is connected with the integration module and accepts start or stop instructions. The vibration pickup sensor is connected with the integrated module and receives a starting or stopping instruction, and is responsible for receiving generated vibration, converting the vibration into an electric signal and feeding back the electric signal to the integrated module.
According to the principle that different vibrations generated when the knocking device knocks the wall of the measuring cylinder when a liquid medium in the measuring cylinder at a set point position rises (or falls) pass (the damping of the liquid medium in the measuring cylinder influences the vibration of the measuring cylinder, the damping is large when the liquid medium exists, the vibration is slow, the generated frequency is low, the damping is small when the liquid medium does not exist, the vibration is rapid, the generated frequency is high), and the vibration pickup sensor receives the change of the vibration and converts the change into an electric signal to transmit to the integrated module. The integrated module is responsible for collecting and receiving electric signals fed back by the vibration pickup sensors, analyzing, calculating and recording according to set thresholds, controlling the start or the close of each point vibration pickup sensor and the knocking device, outputting calculation results as 4-20mA analog signals and displaying liquid levels.
In the first specific embodiment, a workflow is given by taking 4 equally divided point locations with a mounting center distance of 500mm as an example (the point locations and the number can be determined according to actual needs):
1. and (3) mounting and connecting the whole liquid level measuring instrument (the measuring cylinder, the vibration pickup sensor, the knocking device and the integrated module) and switching on a power supply to enter a working state. The primary valve connected with the storage tank is opened, the measured medium is introduced into the measuring cylinder, the medium pressure and the liquid level in the measuring cylinder are consistent (including real-time continuous change of the liquid level during feeding and discharging of the storage tank) according to the principle of the communicating vessel, and the vibration pickup sensors and the knocking devices which are arranged in parallel at each point act in sequence according to the operation and analysis of the integrated module.
2. When the liquid level in the measuring cylinder is lower than a first point position (100 mm) or no liquid medium exists, the integrated module controls the knocking device and the vibration pickup sensor at the first point position to start and continuously work.
3. When the liquid level in the measuring cylinder rises to pass through a first point location (100 mm), the vibration pickup sensor receives vibration frequency change and feeds back an electric signal to the integration module, the integration module receives the electric signal and calculates and outputs a 4mA electric signal to the user DCS system to know that the liquid level is 100mm at the moment, and meanwhile, the first point location knocking device and the vibration pickup sensor are controlled to be closed, and a second point location knocking device and the vibration pickup sensor are started.
4. When the liquid level in the measuring cylinder rises to pass through a second point position (200 mm), the vibration pickup sensor receives vibration frequency change and feeds an electric signal back to the integration module, the integration module receives the electric signal and calculates and outputs a 9.33mA electric signal to the user DCS system to know that the liquid level is 200mm at the moment, and meanwhile, the second point position knocking device and the vibration pickup sensor are controlled to be closed, and the third point position knocking device and the vibration pickup sensor are started.
5. When the liquid level in the measuring cylinder rises and passes through a third point position (300 mm), the vibration pickup sensor receives vibration change and feeds an electric signal back to the integration module, the integration module receives the electric signal and calculates and outputs a 14.67mA electric signal to the user DCS system to know that the liquid level is 300mm at the moment, and meanwhile, the knocking device at the third point position and the vibration pickup sensor are controlled to be closed, and the knocking device at the fourth point position and the vibration pickup sensor are started.
6. When the liquid level in the measuring cylinder rises to pass through a fourth point position (400 mm), the vibration pickup sensor receives vibration change and feeds back an electric signal to the integration module, the integration module receives the electric signal, calculates and outputs a 20mA electric signal to the user DCS system to know that the liquid level is 400mm at the moment, and the knocking device and the vibration pickup sensor at the fourth point position continuously work at the moment.
7. Until the fifth point position is knocked and detected, the electric signal does not reach the threshold value; it means that the liquid level is between the fourth point location and the fifth point location.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (8)
1. A liquid level measuring instrument comprises a measuring cylinder; the method is characterized in that: the measuring cylinder is connected with the storage tank to be measured through a flange and a pipeline, so that the measuring cylinder and the storage tank to be measured form a communicating vessel;
a plurality of knocking devices are arranged on one side of the measuring cylinder from low to high, and a plurality of vibration pickup sensors are arranged on the other side of the measuring cylinder; the knocking device and the vibration pickup sensor form a plurality of detection groups; each detection group comprises a knocking device and a vibration pickup sensor which are corresponding in position; the vibration pickup sensor is connected with the data acquisition module, and the data acquisition module transmits the calculated result to the user DCS control system.
2. A liquid level gauge according to claim 1, wherein: the knocking device comprises a steering engine and a rudder arm driven by the steering engine; the measuring cylinder is used for knocking the wall of the measuring cylinder to generate vibration.
3. A liquid level gauge according to claim 1, wherein: the knocking device adopts a knocking electromagnet; the measuring cylinder is used for knocking the wall of the measuring cylinder to generate vibration.
4. A liquid level gauge according to claim 1, wherein: the side wall of the measuring cylinder is provided with a first flange, a second flange is arranged at the position opposite to the position of the measured storage tank and the flange, the first flange is connected with the second flange through a pipeline, and the measuring cylinder is communicated with the measured storage tank after being connected through the pipeline and the flange.
5. A liquid level gauge according to claim 4, wherein: the pipeline is provided with a primary valve.
6. A liquid level gauge according to claim 1, wherein: and the top of the measuring cylinder is provided with a seal head.
7. A liquid level gauge according to claim 1, wherein: and a discharge valve is arranged at the bottom of the measuring cylinder.
8. A liquid level gauge according to claim 1, wherein: the measuring cylinder is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120870020.XU CN214308995U (en) | 2021-04-26 | 2021-04-26 | Liquid level measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120870020.XU CN214308995U (en) | 2021-04-26 | 2021-04-26 | Liquid level measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214308995U true CN214308995U (en) | 2021-09-28 |
Family
ID=77838526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120870020.XU Active CN214308995U (en) | 2021-04-26 | 2021-04-26 | Liquid level measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214308995U (en) |
-
2021
- 2021-04-26 CN CN202120870020.XU patent/CN214308995U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102564534B (en) | Magnetic liquidometer for water level of steam drum | |
| CN104024614A (en) | Fuel supply system with leakage detection means | |
| CN1970990B (en) | Method for measuring return flow in petroleum drilling and device therefor | |
| CN214308995U (en) | Liquid level measuring instrument | |
| CN103105344A (en) | Measuring device for measuring medium parameters of pulsed extraction columns in pulse state | |
| CN113124962A (en) | Liquid level measuring instrument and measuring method | |
| CN206974511U (en) | A kind of ultrasonic water level gauge for adapting to water level fluctuation | |
| CN209181870U (en) | Liquid level emasuring device | |
| CN216206802U (en) | Far-end gas collection type liquid level detection device | |
| CN110319909A (en) | A kind of magnetic float level indicator calibrating installation | |
| CN104571096A (en) | On-line fault diagnosis method and system of coal-fired power plant coal feeder | |
| CN115791979A (en) | Acoustic emission internal detection method and device for corrosion of bottom plate of large-scale carrier liquid storage tank | |
| CN213887389U (en) | Automatic electrode cleaning device for measuring pH value of fluid electrolyte | |
| CN211877177U (en) | Sewage plant does mud storage tank position in storehouse measuring device | |
| CN1758033B (en) | All working condition high precision electrode sensor system of steam pocket large mass or water level | |
| CN209655836U (en) | A kind of furnace pressure detection system of kiln | |
| CN213600167U (en) | Multi-absorption-tower parallel-operation turnover plate liquid level meter for full-oil recovery system | |
| CN205246067U (en) | Level detection sensor | |
| CN201574168U (en) | Vacuum treatment jacking system | |
| CN206695874U (en) | Dual chamber liquid level gauge | |
| CN105973750A (en) | Method and system for measuring density of desulfurization slurry in power plant desulfurization pre-washing tower | |
| CN219867836U (en) | Boiler drum water level monitoring device | |
| CN216433169U (en) | Novel bin level meter device | |
| CN213874554U (en) | Discrete material level detection and transmission display device | |
| CN220508160U (en) | Liquid level measuring device under complex working condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |