CN208013793U - The automatic flow rate adjusting device of bell-jar gas flow standard equipment - Google Patents
The automatic flow rate adjusting device of bell-jar gas flow standard equipment Download PDFInfo
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- CN208013793U CN208013793U CN201820130117.5U CN201820130117U CN208013793U CN 208013793 U CN208013793 U CN 208013793U CN 201820130117 U CN201820130117 U CN 201820130117U CN 208013793 U CN208013793 U CN 208013793U
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Abstract
The utility model discloses a kind of automatic flow rate adjusting devices of bell-jar gas flow standard equipment, including controller, motor driver, motor, flow control valve and gas flow harvester, the gas outlet for the tested gas flowmeter being arranged on bell-jar gas flow standard equipment outlet pipe connects the air inlet of the flow control valve, and the gas outlet of the flow control valve is communicated with the external world；Controller connects motor driver, and gas flow harvester connects controller, the flow signal for obtaining bell-jar gas flow standard equipment, and sends the flow signal of the bell-jar gas flow standard equipment got to controller.The automatic quick adjusting of each test point flow of bell-jar gas flow standard equipment may be implemented in utility model device.
Description
Technical field
The utility model is related to a kind of bell-jar gas flow standard equipment, more particularly to a kind of bell-jar gas flow mark
The automatic flow rate adjusting device of standard apparatus.
Background technology
Bell-jar gas flow standard equipment is that common gas flow is traced to the source device, for examining and determine, testing various gases
Flowmeter, such as gas volume formula flowmeter, gas velocity formula flowmeter, air differential pressure formula flowmeter, gas float flow meter.
Operate bell-jar gas flow standard equipment when, each test point gas flow adjustment generally by manual modulation valve come into
Capable, the aperture of hand-operated valve, the instantaneous flow for the device that one side observing system is shown are adjusted on one side, until reaching prescribed requirement.
The degree of automation of this method is not high, adjusts time-consuming and laborious；When manual modulation valve is insensitive or excessively sensitive, it is difficult to adjust
To defined flow point.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and deficiency, provide a kind of bell-jar gas flow mark
The each test point flow of bell-jar gas flow standard equipment may be implemented in the automatic flow rate adjusting device of standard apparatus, the device
It is automatic quickly to adjust.
The purpose of this utility model is achieved through the following technical solutions：A kind of flow of bell-jar gas flow standard equipment
Self-checking device, including controller, motor driver, motor, flow control valve and gas flow harvester,
The gas outlet for the tested gas flowmeter being wherein arranged on bell-jar gas flow standard equipment outlet pipe connects
The gas outlet of the air inlet of the flow control valve, the flow control valve is communicated with the external world；
The controller connects motor driver, and the motor driver connects flow control valve by motor, with control
The aperture of flow control valve；
The gas flow harvester connects controller, and the flow for obtaining bell-jar gas flow standard equipment is believed
Number, and send the flow signal of the bell-jar gas flow standard equipment got to controller.
Preferably, the gas flow harvester is calibrating gas flowmeter, the calibrating gas flowmeter connection control
Device processed, the calibrating gas flowmeter setting is where being detected gas flowmeter on pipeline.
Preferably, the gas flow harvester includes multiple position switch, and each position switch is along bell-jar gas
Body flow standard device vertical direction is set gradually；Each position switch is separately connected controller.
Preferably, it is provided with shut-off valve on pipeline where being detected gas flowmeter, the shut-off valve is located at bell-jar gas
Between flow standard device and tested gas flowmeter.
Preferably, it is correspondingly arranged on the first survey respectively on the pipeline that tested gas flowmeter air inlet and gas outlet are connected
Pressure instrument and the first temperature measuring device, the first pressure measurement instrument and the first temperature measuring device are separately connected controller；
The second pressure measurement instrument is correspondingly arranged on the pipeline that calibrating gas flowmeter air inlet and gas outlet are connected respectively
With the second temperature measuring device, the second pressure measurement instrument and the second temperature measuring device are separately connected controller.
Further, the first pressure measurement instrument and the second pressure measurement instrument are pressure transmitter.
Further, first temperature measuring device and the second temperature measuring device carry out temperature-sensitive by platinum resistance.
Preferably, the flow control valve is flow equal percentage type electric flow control valve.
Preferably, the motor is servo motor.
Preferably, the controller is microcontroller.
The utility model has the following advantages compared with the existing technology and effect：
(1) a kind of automatic flow rate adjusting device of bell-jar gas flow standard equipment of the utility model include controller,
Motor driver, motor, flow control valve and gas flow harvester, wherein bell-jar gas flow standard equipment outlet
The gas outlet for the tested gas flowmeter being arranged on pipeline connects the air inlet of the flow control valve, the outlet of flow control valve
Mouth is communicated with the external world；Controller controls the aperture of flow control valve by motor driver and motor；Gas flow harvester
Connect controller, the flow signal for obtaining bell-jar gas flow standard equipment.In the present invention, controller according to
The target flow of test point and the present flow rate in bell-jar gas flow standard equipment carry out the aperture of flow control valve
Adjust automatically, so that the present flow rate in bell-jar gas flow standard equipment reaches target flow, to realize checked gas
The calibrating and test of flowmeter body；Therefore clock may be implemented compared to the manual flow regulative mode of transmission in utility model device
The automatic quick adjusting of each test point flow of bell-type gas flow standard device.
(2) in the automatic flow rate adjusting device of the utility model bell-jar gas flow standard equipment, gas flow acquisition
Device can be the calibrating gas flowmeter being arranged where tested gas flowmeter on pipeline, or open multiple positions
It closes, wherein each position switch is set gradually along bell-jar gas flow standard equipment vertical direction；Each position switch point
Controller is not connected, bell-type gas flow standard device can be got by above-mentioned gas flow harvester real-time
In present flow rate.
(3) in the automatic flow rate adjusting device of the utility model bell-jar gas flow standard equipment, flow-rate adjustment is controlled
The motor that valve events change aperture can be servo motor, and flow control valve can be fast and accurately controlled by servo motor
Aperture.
(4) in the automatic flow rate adjusting device of the utility model bell-jar gas flow standard equipment, controller can make
With microcontroller, have the advantages that cost more.
Description of the drawings
Fig. 1 is 1 device circuit schematic diagram of the utility model embodiment.
Fig. 2 is 1 apparatus structure schematic diagram of the utility model embodiment.
Fig. 3 is 2 device circuit schematic diagram of the utility model embodiment.
Fig. 4 is 2 apparatus structure schematic diagram of the utility model embodiment.
Specific implementation mode
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1
Present embodiment discloses a kind of automatic flow rate adjusting devices of bell-jar gas flow standard equipment, such as Fig. 1 and 2 institutes
Show, including controller, motor driver, motor, flow control valve 1 and gas flow harvester,
Wherein as shown in Fig. 2, the tested gas flowmeter 2 that is arranged on bell-jar gas flow standard equipment outlet pipe
Gas outlet connects the air inlet of the flow control valve 1, and 1 gas outlet of flow control valve is communicated with the external world；
Controller connects motor driver, and motor driver connects flow control valve by motor, controlled by controller
The aperture of flow control valve；
Gas flow harvester connection controller, the flow signal for obtaining bell-jar gas flow standard equipment,
And send the flow signal of the bell-jar gas flow standard equipment got to controller.
In the present embodiment, as illustrated in fig. 1 and 2, gas flow harvester is calibrating gas flowmeter 6, calibrating gas stream
Gauge 6 connects controller, and calibrating gas flowmeter is arranged on 2 place pipeline of tested gas flowmeter, the gas measured
Body flow signal is sent to controller.
In the present embodiment, as shown in Fig. 2, being provided with shut-off valve 3, shut-off valve 3 on 2 place pipeline of tested gas flowmeter
Between bell-jar gas flow standard equipment and tested gas flowmeter 2.Bell-jar gas stream can be controlled by shut-off valve 3
Whether amount standard set-up flows out to tested gas flowmeter.
In the present embodiment, as shown in Fig. 2, on the pipeline that tested 2 air inlet of gas flowmeter and gas outlet are connected respectively
It is correspondingly arranged on the first pressure measurement instrument 5 and the first temperature measuring device 4, the first pressure measurement instrument 5 and the first temperature measuring device 4 are separately connected control
Device processed can send the pressure signal measured and temperature signal to controller.6 air inlet of calibrating gas flowmeter and outlet
It is correspondingly arranged on the second pressure measurement instrument 51 and the second temperature measuring device 41,51 He of the second pressure measurement instrument respectively on the pipeline that mouth is connected
Second temperature measuring device 41 is separately connected controller, can send the pressure signal measured and temperature signal to controller.
The first pressure measurement instrument and the second pressure measurement instrument can be pressure transmitter in the present embodiment.In the present embodiment,
First temperature measuring device and the second temperature measuring device carry out temperature-sensitive by platinum resistance.
In the present embodiment, flow control valve is flow equal percentage type electric flow control valve.Motor is servo motor,
The working power AC220V of the servo motor.
In the present embodiment, controller is microcontroller.
In the present embodiment, the course of work of the automatic flow rate adjusting device of above-mentioned bell-jar gas flow standard equipment is such as
Under：
S1, first flow point are adjusted：
The aperture of flow control valve is 0% at this time, and controller gets first test point target flow value
QmaxFor the flow rate upper limit value of bell-jar gas flow standard equipment), after controller receives flow-rate adjustment open command, open
Begin to carry out flow-rate adjustment：Controller control flow-rate adjustment valve opening is slowly increased to D since 0%1%, observation is current in the process
Gas flow values QxClose to target flow valueWhen stop adjust, stablize 10s after, determine current gas flow value flowMeetIt is adjusted to complete first flow point.
S2, other flows point are adjusted：
On the basis of upper flow point, present flow rate point adjusting is carried out.
(1) examination is adjusted：Controller gets current detection point target flow valuePresent flow rate
Aperture D when control valve opening is upper flow pointn-1%, current gas flow value flow areController controls flow
Control valve opening is from Dn-1% is slowly adjusted toAfter stablizing 10s, judge current
Gas flow values flowWhether the following conditions are met：
It adjusts if so, completing flow point, is adjusted again if it is not, then entering.
(2) it adjusts again：Controller controls flow-rate adjustment valve opening from Dn% is slowly adjusted to
After stablizing 10s, current gas flow value flow is judgedWhether meet
The following conditions：It is adjusted if so, completing flow point, if it is not, repeating (2) until flow tune
Section is completed.
Embodiment 2
Present embodiment discloses a kind of automatic flow rate adjusting devices of bell-jar gas flow standard equipment, such as the institutes of Fig. 3 and 4
Show, the present embodiment is differed only in embodiment 1, and the gas flow harvester in the present embodiment includes multiple position switch
7, each position switch 7 is set gradually along bell-jar gas flow standard equipment vertical direction；Each position switch connects respectively
Connect controller.
Wherein in the present embodiment, controller gets the tool of bell-jar gas flow standard equipment internal gas flow in real time
Body principle is as follows：
At current time, if controller initially receives the pulse signal of certain position switch a, controller calculates one
The secondary pulse signal for initially receiving certain position switch b to current time period S；Then controller is according to certain position switch
The volume of bell-jar gas flow standard equipment between b and certain position switch a, can calculate in conjunction with period S obtained above
Go out the gas flow at current time inside bell-jar gas flow standard equipment.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model is not by above-mentioned
The limitation of embodiment, under other any Spirit Essences and principle without departing from the utility model made by change, modify, replace
In generation, simplifies combination, should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (10)
1. a kind of automatic flow rate adjusting device of bell-jar gas flow standard equipment, which is characterized in that including controller, motor
Driver, motor, flow control valve and gas flow harvester；
Described in the gas outlet connection for the tested gas flowmeter being wherein arranged on bell-jar gas flow standard equipment outlet pipe
The gas outlet of the air inlet of flow control valve, the flow control valve is communicated with the external world；
The controller connects motor driver, and the motor driver connects flow control valve by motor, to control flow
The aperture of regulating valve；
The gas flow harvester connection controller, the flow signal for obtaining bell-jar gas flow standard equipment,
And send the flow signal of the bell-jar gas flow standard equipment got to controller.
2. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
The gas flow harvester is calibrating gas flowmeter, and the calibrating gas flowmeter connects controller, the Standard Gases
Flowmeter body setting is where being detected gas flowmeter on pipeline.
3. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
The gas flow harvester includes multiple position switch, and each position switch hangs down along bell-jar gas flow standard equipment
Histogram is to setting gradually；Each position switch is separately connected controller.
4. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
Be provided with shut-off valve where tested gas flowmeter on pipeline, the shut-off valve be located at bell-jar gas flow standard equipment and by
Between inspection gas flowmeter.
5. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
The first pressure measurement instrument and first is correspondingly arranged on the pipeline that tested gas flowmeter air inlet and gas outlet are connected respectively to survey
Warm instrument, the first pressure measurement instrument and the first temperature measuring device are separately connected controller；
The second pressure measurement instrument and are correspondingly arranged on the pipeline that calibrating gas flowmeter air inlet and gas outlet are connected respectively
Two temperature measuring devices, the second pressure measurement instrument and the second temperature measuring device are separately connected controller.
6. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 5, which is characterized in that
The first pressure measurement instrument and the second pressure measurement instrument are pressure transmitter.
7. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 5, which is characterized in that
First temperature measuring device and the second temperature measuring device carry out temperature-sensitive by platinum resistance.
8. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
The flow control valve is flow equal percentage type electric flow control valve.
9. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, which is characterized in that
The motor is servo motor.
10. the automatic flow rate adjusting device of bell-jar gas flow standard equipment according to claim 1, feature exist
In the controller is microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820130117.5U CN208013793U (en) | 2018-01-25 | 2018-01-25 | The automatic flow rate adjusting device of bell-jar gas flow standard equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820130117.5U CN208013793U (en) | 2018-01-25 | 2018-01-25 | The automatic flow rate adjusting device of bell-jar gas flow standard equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208013793U true CN208013793U (en) | 2018-10-26 |
Family
ID=63883460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820130117.5U Active CN208013793U (en) | 2018-01-25 | 2018-01-25 | The automatic flow rate adjusting device of bell-jar gas flow standard equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208013793U (en) |
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2018
- 2018-01-25 CN CN201820130117.5U patent/CN208013793U/en active Active
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