CN207147598U - A kind of device of bubbling liquid-level meter calibration instrument zero point - Google Patents
A kind of device of bubbling liquid-level meter calibration instrument zero point Download PDFInfo
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- CN207147598U CN207147598U CN201720606958.4U CN201720606958U CN207147598U CN 207147598 U CN207147598 U CN 207147598U CN 201720606958 U CN201720606958 U CN 201720606958U CN 207147598 U CN207147598 U CN 207147598U
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Abstract
The utility model discloses a kind of device of bubbling liquid-level meter calibration instrument zero point, including bubbling connecting pipe, bubbling compressed air source unit, capillary throttle device, pressure-detecting device, liquid level container to be measured, for realizing the two-way valve of zero point correction, the outlet of bubbling compressed air source unit and the import of capillary throttle device connect, the outlet access bubbling connecting pipe of capillary throttle device, the lower end of bubbling connecting pipe is inserted perpendicularly into the bottom of liquid level container to be measured, pressure-detecting device is connected with bubbling connecting pipe, one end of two-way valve is connected with bubbling connecting pipe, the other end of two-way valve is free end.By establishing bubbling connecting pipe to the connecting line of ullage space, and two-way valve is installed on bubbling connecting pipe, after two-way valve conducting and pressure indicating value stabilization, instrument returns to zero or read zero liquid level signal value, realizes zero point correction, and the structure of whole calibration zero point device is simple, good airproof performance, control is succinct, and cost is cheap, securely and reliably.
Description
Technical field
The utility model belongs to instrument calibration technical field, in particular to a kind of bubbling liquid-level meter calibration instrument zero point
Device.
Background technology
In the prior art, bubbling liquid-level meter zero point correction is surveyed using stopping supply while short-circuit sensor liquid-level pressure
Amount end and pressure ratio realizes there are three kinds of specific implementations compared with holding：Valve turns off high-pressure air source, while is vented bubbling with valve
Gas in connecting pipe；Air pump is closed, while gas in bubbling connecting pipe is vented with valve；It is straight with triple valve or identical functions valve group
Connect and sensor liquid-level pressure measuring port is cut out into emptying from bubbling connecting pipe.No matter any implementation, hardware all be present
More, complicated, the problem of cumbersome thus reliability of control is also lower.
Bubbling liquid-level meter needs to stop supplying when calibrating zero point, in order to overcome the flowing that the fluxion strap of bubbled gas comes
The influence of pressure drop.In the bubble type liquid level measuring system of capillary-compensated, throttled due to efficient, gas in bubbling connecting pipe
Flow velocity is very small, and flow pressure drop is reduced to the following magnitude of the millimeter of water, no longer zero point correction and level gauging is formed aobvious
The influence of work.
Based on this, the dress for designing a kind of more simple, cheap, reliable bubbling liquid-level meter calibration zero point is studied and developed
Put.
Utility model content
The purpose of this utility model is：A kind of bubbling liquid-level meter calibration instrument zero suitable for capillary-compensated is provided
The device of point, sets two-way valve, and the liquid-level pressure measuring end of short-circuit pressure-detecting device and pressure ratio obtain zero point pressure compared with end
Power inputs, and realizes zero point correction, the device hardware for solving the 2 points of calibrations of existing bubbling liquid-level meter are more, it is complicated, control
The technical problem such as cumbersome.
The utility model is achieved through the following technical solutions：
A kind of device of bubbling liquid-level meter calibration instrument zero point, including bubbling connecting pipe, bubbling compressed air source unit, capillary
Throttling arrangement, pressure-detecting device, liquid level container to be measured, the two-way valve for realizing zero point correction, bubbling compressed air source unit go out
Mouth is connected with the import of capillary throttle device, the outlet access bubbling connecting pipe of capillary throttle device, bubbling connecting pipe
Lower end is inserted perpendicularly into the bottom of liquid level container to be measured, pressure-detecting device and is connected with bubbling connecting pipe, one end of two-way valve with
Bubbling connecting pipe connects, and the other end of two-way valve is free end.
In the technical program, in the bubbling liquid-level meter liquid level measuring system of capillary-compensated, bubbling source of the gas dress is established
Put, the pipeline of the composition such as capillary throttle device, bubbling connecting pipe, the liquid internal of the pipeline connection to liquid level container to be measured,
Two-way valve, control system monitoring pressure are installed on bubbling connecting pipe；When two-way valve turns on, and the pressure of pressure-detecting device
After registration value stabilization, instrument zeroing or reading zero liquid level signal value, zero point correction is realized；Two-way valve is closed, when pressure detecting fills
When putting the pressure detected in bubbling connecting pipe and rising rapidly to stablize relatively, recover normal measurement.
In the technical program, bubbling liquid-level meter can be completed by using structures such as two-way valve, pressure-detecting devices
Zero point correction.
Wherein one end of two-way valve is connected with bubbling pressure guidance device, and the other end is free end, and free end is specially to be examined with pressure
Survey device liquid-level pressure measuring pressure ratio relatively to hold, i.e., pressure-detecting device detects the free end pressure of liquid-level pressure and two-way valve
It is compared.
Wherein, the caliber of the pipeline of two connection ends of two-way valve is all higher than the caliber equal to bubbling connecting pipe.
Further, the pressure-detecting device is pressure sensor.
Further, in order to realize the intelligentized control method to two-way valve, in addition to controller, program storage, output mould
Block, acquisition module, display module, controller are connected with program storage, output module, acquisition module, display module respectively.
Wherein, the structure of controller, program storage, output module, acquisition module, display module etc. and its principle are this
Well known to art personnel.And controller, program storage, output module, acquisition module, display module can be gathered integrally
Structure, it is connected with two-way valve electric signal, during practical operation, the hand-holdable integrative-structure of operating personnel, is easy to bubble type liquid level
Meter carries out calibration operation.Controller, program storage, output module, acquisition module, display module described in the technical program
Structure and its principle are known to those skilled in the art, are no longer described in detail.
Further, the level gauge to be measured is open-top receptacle, and one end of two-way valve is more than or equal to bubbling by caliber
Connecting pipe caliber, the pipeline that length is less than or equal to bubbling connecting pipe are connected with bubbling connecting pipe, the other end free end of two-way valve
With atmosphere.
Further, the level gauge to be measured is closed vessel, the free end of two-way valve and the liquid of level gauge to be measured
Body upper space connects.
Further, the pressure-detecting device is differential pressure pick-up, one end and the bubbling connecting pipe of differential pressure pick-up
Upper end is connected, and the other end of differential pressure pick-up connects with the internal liquid upper space of level gauge to be measured, and differential pressure pick-up is used
Pressure differential between detection bubbling connecting pipe internal pressure and the internal liquid level superjacent air space pressure of liquid level container to be measured.
Further, the two-way valve is direct acting type magnetic valve or miniature electromagnetic valve.
The utility model compared with prior art, has the following advantages and advantages：
The utility model establishes bubbling connecting pipe to ullage in the bubble type liquid level measuring system of capillary-compensated
The connecting line in space, and two-way valve is installed on bubbling connecting pipe, after two-way valve conducting and pressure indicating value stabilization, instrument is adjusted
Zero or zero liquid level signal value is read, realize zero point correction, and the structure of whole calibration zero point device is simple, good airproof performance, control
Succinctly, cost is cheap, securely and reliably.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the structural representation of the utility model embodiment 1；
Fig. 2 is the structural representation of the utility model embodiment 2；
Mark and corresponding parts title in accompanying drawing：
1-bubbling compressed air source unit, 2-pressure-detecting device, 3-bubbling connecting pipe, 4-liquid level container to be measured, 5- two are logical
Valve, 6- capillary throttle devices.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1：
As shown in figure 1, a kind of device of bubbling liquid-level meter calibration instrument zero point, including bubbling connecting pipe 3, bubbling source of the gas
Device 1, capillary throttle device 6, pressure-detecting device 2, liquid level container 4 to be measured, the two-way valve 5 for realizing zero point correction,
The outlet of bubbling compressed air source unit 1 is connected with the import of capillary throttle device 6, the outlet access bubbling of capillary throttle device 6
Connecting pipe 3, the lower end of bubbling connecting pipe 3 is inserted perpendicularly into the bottom of liquid level container 4 to be measured, pressure-detecting device 2 leads with bubbling
Pressure pipe 3 is connected, and one end of two-way valve 5 is connected with bubbling connecting pipe 3, and the other end of two-way valve 5 is free end.
Wherein, pressure-detecting device 2 is pressure sensor, wherein liquid level container 4 to be measured is open-top receptacle.
Wherein, the device of bubbling liquid-level meter calibration instrument zero point described in the present embodiment, in addition to controller, program storage
Device, output module, acquisition module, display module, controller respectively with program storage, output module, acquisition module, display mould
Block connects, and two-way valve 5 is miniature electromagnetic valve, and specific physical parameter transmittance process is：The central processing unit of controller is according to journey
Monitoring programme in sequence memory sets gas communication and deadline interval, and the execution signal is led to by output module control two
The opening and closing of the conducting state of valve, in deadline interval, air-flow remains static, and pressure sensor is by detection
Pressure parameter is changed into electric signal, sends acquisition module to, and acquisition module converts electrical signals to data signal, controller according to
The data signal in acquisition module is converted to liquid level value signal and is transferred to output module by monitoring programme in program storage, output
Liquid level value signal in module is transferred to display module i.e. display, and personnel easy to operation check, or the numerical value according to display
Carry out calibration operation or check calibration process.The controller that is directed to, process simulator, output module, acquisition module, adopt
Collection module can assemble one and be applied integrally in bubbling liquid-level meter reference instrument calibrating installation, and controller, program are simulated
Device, output module, acquisition module, the concrete structure of acquisition module and its principle are known to those skilled in the art, and such as
It is above described to be applied to the device in the method for calibration instrument zero point, beneficial to whole calibration process intellectualized operation, calibration efficiency
Improve.
Wherein, one end of two-way valve 5 is more than or equal to the caliber of bubbling connecting pipe 3 by caliber, and length is led less than or equal to bubbling
The pipeline of pressure pipe 3 is connected with bubbling connecting pipe 3, the other end free end of two-way valve 5 and atmosphere.
Specific operation process is：When needing to calibrate zero point, two-way valve 5 turns on, bubbling connecting pipe 2 and atmosphere, bubbling
Gas quick release in connecting pipe 3, after balance, from minimum gas of the bubbling compressed air source unit 1 after the throttling of capillary throttle device 6
Stream, air is flowed directly into insignificant pressure loss, the liquid-level pressure measuring end pressure of pressure sensor is relatively held with pressure ratio
Equalization of pressure is same as atmospheric pressure, instrument zeroing or reading zero liquid level signal value, realizes zero point correction；After zero point correction terminates,
Two-way valve 5 is closed, after pressure sensor indicating value is stable, recovers normal measurement.
Embodiment 2：
The present embodiment and the difference of embodiment 1 are：As shown in Fig. 2 the level gauge to be measured 4 is closed vessel, two
The free end of port valve 5 connects with the liquid upper space of level gauge 4 to be measured.
The pressure-detecting device 2 is differential pressure pick-up, and one end of differential pressure pick-up connects with the upper end of bubbling connecting pipe 3
Logical, the other end of differential pressure pick-up connects with the internal liquid upper space of level gauge 4 to be measured, and differential pressure pick-up is used to detect
Pressure differential between the internal pressure of bubbling connecting pipe 3 and the internal liquid level superjacent air space pressure of liquid level container 4 to be measured.
Two-way valve 5 is direct acting type magnetic valve in the present embodiment.
Specific operation process is：When needing to calibrate zero point, two-way valve 5 turns on, bubbling connecting pipe 3 and liquid level container 4 to be measured
The connection of internal liquid level superjacent air space, gas quick release enters on the internal liquid level of liquid level container 4 to be measured in bubbling connecting pipe 3
Side space, after balance, from minimum air-flow of the bubbling compressed air source unit 1 after the throttling of capillary throttle device 6, with insignificant pressure
Loss flows directly into the internal liquid level superjacent air space of liquid level container 4 to be measured, differential pressure pick-up liquid-level pressure measuring end pressure and pressure
Power compares the internal liquid level superjacent air space gas pressure that end pressure is equal to prepare liquid position container 4, instrument zeroing or reading zero
Liquid level signal value, realizes zero point correction；After zero point correction terminates, two-way valve 5 is closed, it is extensive after pressure sensor indicating value is stable
Multiple normal measurement.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (7)
- A kind of 1. device of bubbling liquid-level meter calibration instrument zero point, it is characterised in that：Including bubbling connecting pipe (3), bubbling gas Source device (1), capillary throttle device (6), pressure-detecting device (2), liquid level container to be measured (4), for realizing zero point correction Two-way valve (5), the outlet of bubbling compressed air source unit (1) is connected with the import of capillary throttle device (6), capillary throttle device (6) outlet access bubbling connecting pipe (3), the lower end of bubbling connecting pipe (3) is inserted perpendicularly into the bottom of liquid level container (4) to be measured Portion, pressure-detecting device (2) are connected with bubbling connecting pipe (3), and one end of two-way valve (5) is connected with bubbling connecting pipe (3), and two is logical The other end of valve (5) is free end.
- A kind of 2. device of bubbling liquid-level meter calibration instrument zero point according to claim 1, it is characterised in that：The pressure Force checking device (2) is pressure sensor.
- A kind of 3. device of bubbling liquid-level meter calibration instrument zero point according to claim 1, it is characterised in that：Also include Controller, program storage, output module, acquisition module, display module, controller respectively with program storage, output module, Acquisition module, display module connection.
- A kind of 4. device of bubbling liquid-level meter calibration instrument zero point according to claim 3, it is characterised in that：It is described to treat It is open-top receptacle to survey liquid level container (4), and one end of two-way valve (5) is more than or equal to bubbling connecting pipe (3) caliber, length by caliber Pipeline less than or equal to bubbling connecting pipe (3) is connected with bubbling connecting pipe (3), the other end free end of two-way valve (5) and air Connection.
- A kind of 5. device of bubbling liquid-level meter calibration instrument zero point according to claim 3, it is characterised in that：It is described to treat It is closed vessel to survey liquid level container (4), and the free end of two-way valve (5) connects with the liquid upper space of liquid level container (4) to be measured.
- A kind of 6. device of bubbling liquid-level meter calibration instrument zero point according to claim 5, it is characterised in that：The pressure Force checking device (2) is differential pressure pick-up, and one end of differential pressure pick-up connects with the upper end of bubbling connecting pipe (3), differential pressure sensing The other end of device connects with the internal liquid upper space of liquid level container (4) to be measured, and differential pressure pick-up is used to detect bubbling pilot Manage the pressure differential between (3) internal pressure and the internal liquid level superjacent air space pressure of liquid level container to be measured (4).
- 7. a kind of device of bubbling liquid-level meter calibration instrument zero point according to claim 1 to 6 any one, its feature It is：The two-way valve is direct acting type magnetic valve or miniature electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720606958.4U CN207147598U (en) | 2017-05-27 | 2017-05-27 | A kind of device of bubbling liquid-level meter calibration instrument zero point |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720606958.4U CN207147598U (en) | 2017-05-27 | 2017-05-27 | A kind of device of bubbling liquid-level meter calibration instrument zero point |
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| CN207147598U true CN207147598U (en) | 2018-03-27 |
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| CN201720606958.4U Active CN207147598U (en) | 2017-05-27 | 2017-05-27 | A kind of device of bubbling liquid-level meter calibration instrument zero point |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780834A (en) * | 2020-07-21 | 2020-10-16 | 安东仪器仪表检测有限公司 | Calibration method of pressure liquid level meter |
| WO2021258258A1 (en) * | 2020-06-22 | 2021-12-30 | 深圳市大疆创新科技有限公司 | Flow meter calibration method, apparatus and device, and storage medium |
-
2017
- 2017-05-27 CN CN201720606958.4U patent/CN207147598U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021258258A1 (en) * | 2020-06-22 | 2021-12-30 | 深圳市大疆创新科技有限公司 | Flow meter calibration method, apparatus and device, and storage medium |
| CN111780834A (en) * | 2020-07-21 | 2020-10-16 | 安东仪器仪表检测有限公司 | Calibration method of pressure liquid level meter |
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