CN204346469U - Switchable pressure difference transmitter - Google Patents
Switchable pressure difference transmitter Download PDFInfo
- Publication number
- CN204346469U CN204346469U CN201420852622.2U CN201420852622U CN204346469U CN 204346469 U CN204346469 U CN 204346469U CN 201420852622 U CN201420852622 U CN 201420852622U CN 204346469 U CN204346469 U CN 204346469U
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- sensor
- pressure
- guiding channel
- mouth
- pressure difference
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Abstract
The utility model provides a kind of switchable pressure difference transmitter, and this transmitter comprises the first sensor measuring differential pressure, the second sensor measuring pressure; The signal output part of first sensor, the signal output part of the second sensor are all connected with change-over switch, change-over switch can select the electric signal reading first sensor, the second sensor individually or simultaneously, change-over switch is connected with signal processing circuit plate, signal processing circuit plate is connected with output cable, exports cable and is connected with host computer.This switchable pressure difference transmitter, structure is simple, and reliable and stable, measuring accuracy is high, can realize differential pressure and pressure in industrial process and measure individually or simultaneously, is applicable to the measurement of non-corrosive liquid in pipeline or flow field, gas or steam differential pressure and pressure.
Description
Technical field
The utility model relates to a kind of switchable pressure difference transmitter.
Background technology
Differential pressure transmitter is widely used in the differential pressure measurement of industrial circle, as the dynamic pressure of liquid, gas or steam in measuring channel, and is converted into electric signal output.In addition, in many processes, also expecting can absolute pressure simultaneously in measuring channel.This information may be used for the variable density of Fluid Computation, and the measurement for flow provides information more accurately.
At present, most of differential pressure pick-up cannot measure absolute pressure, and needing increases independently that pressure transducer is to carry out the measurement of absolute pressure, and pressure transducer is undertaken in parallel with differential pressure pick-up by three-way connection, thus realizes the measurement respectively of pressure and differential pressure.This measuring method not only instrument is complicated, and each measurement point needs pressure, differential pressure two kinds of sensors, and mounting interface is many, causes the possibility of leaking to increase.Adopt the method measuring pressure and differential pressure respectively simultaneously, easily cause measuring error to increase, reduce the degree of confidence of measurement result.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of switchable pressure difference transmitter, need measure respectively for solving pressure and differential pressure in prior art, and surveying instrument is complicated, measuring error is large, the problem that the possibility of leakage is large.
For achieving the above object and other relevant objects, the utility model provides a kind of switchable pressure difference transmitter, and this transmitter comprises first sensor, the second sensor; One pressure sensitive side of first sensor is communicated with by the first guiding channel and first mouth that pressurizes, and another pressure sensitive side of first sensor is passed through the second guiding channel and second mouth that pressurizes and is communicated with; One pressure sensitive side of the second sensor is communicated with by the 3rd guiding channel and the 3rd mouth that pressurizes, and another pressure sensitive side of the second sensor is passed through the 4th guiding channel and the 4th mouth that pressurizes and is communicated with; Be provided with conductive channel between second guiding channel and the 3rd guiding channel, conductive channel is provided with isolation valve; The signal output part of first sensor, the signal output part of the second sensor are all connected with change-over switch, change-over switch can select the electric signal reading first sensor, the second sensor individually or simultaneously, change-over switch is connected with signal processing circuit plate, signal processing circuit plate is connected with output cable, exports cable and is connected with host computer.
Preferably, this transmitter is provided with first sensor base, first sensor base is provided with first sensor standing groove, first sensor is placed in first sensor standing groove, first guiding channel, the second guiding channel are positioned at first sensor base, and the live end of the first pressurization mouth, the second pressurization mouth extend out to the outside of first sensor base.
Preferably, this transmitter is provided with the second sensor base, second sensor base is provided with the second sensor standing groove, second sensor is placed in the second sensor standing groove, 3rd guiding channel, the 4th guiding channel are positioned at the second sensor base, and the live end of the 3rd pressurization mouth, the 4th pressurization mouth extend out to the outside of the second sensor base.
Preferably, signal processing circuit plate is fixed in insulation booth.
Preferably, the most external of this transmitter is provided with shell, and the live end of the first pressurization mouth, the second pressurization mouth, the 3rd pressurization mouth and the 4th pressurization mouth extend out to the outside of shell, and the output terminal exporting cable also extend out to the outside of shell.Further preferably, the output terminal cover exporting cable has water joint, and water joint is arranged on shell.
As mentioned above, the switchable pressure difference transmitter of the utility model, has following beneficial effect:
This switchable pressure difference transmitter, structure is simple, and reliable and stable, measuring accuracy is high, can realize differential pressure and pressure in industrial process and measure individually or simultaneously, is applicable to the measurement of non-corrosive liquid in pipeline or flow field, gas or steam differential pressure and pressure.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of the switchable pressure difference transmitter of the utility model.
Element numbers explanation
1 first pressurization mouth
2 second pressurization mouths
3 the 3rd pressurization mouths
4 the 4th pressurization mouths
5 first sensor bases
6 second sensor base
7 first sensor standing grooves
8 second sensor standing grooves
9 change-over switches
10 signal processing circuit plates
11 first guiding channels
12 insulation booths
13 water joints
14 export cable
15 first sensor winding displacements
16 second sensor winding displacements
17 first sensors
18 second sensors
19 change-over switches export winding displacement
20 isolation valves
21 second guiding channels
22 shells
23 conductive channel
31 the 3rd guiding channels
41 the 4th guiding channels
Embodiment
Below by way of specific instantiation, embodiment of the present utility model is described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present utility model and effect easily.The utility model can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present utility model.
Refer to Fig. 1.Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
As shown in Figure 1, the utility model provides a kind of switchable pressure difference transmitter, and this transmitter comprises first sensor 17, second sensor 18; One pressure sensitive side of first sensor 17 is communicated with by the first guiding channel 11 and first mouth 1 that pressurizes, and another pressure sensitive side of first sensor 17 is communicated with by the second guiding channel 21 and second mouth 2 that pressurizes; One pressure sensitive side of the second sensor 18 is communicated with by the 3rd guiding channel 31 and the 3rd mouth 3 that pressurizes, and another pressure sensitive side of the second sensor 18 is communicated with by the 4th guiding channel 41 and the 4th mouth 4 that pressurizes; Be provided with conductive channel 23 between second guiding channel 21 and the 3rd guiding channel 31, conductive channel 23 is provided with isolation valve 20; The signal output part of first sensor 17, the signal output part of the second sensor 18 are all connected with change-over switch 9, change-over switch 9 can select the electric signal reading first sensor 17, second sensor 18 individually or simultaneously, change-over switch 9 is connected with signal processing circuit plate 10, signal processing circuit plate 10 is connected with output cable 14, exports cable 14 and is connected with host computer.
4th pressurization mouth 4 of above-mentioned pressure difference transmitter all keeps sealing state under normal conditions, all keeps vacuum state in the 4th guiding channel 41.
Change-over switch 9 has three transmission channels, for differential pressure measurement transmission channel, pressure survey transmission channel and pressure differential pressure measure transmission channel simultaneously.When change-over switch 9 is rotated and switched to differential pressure measurement transmission channel, signal processing circuit plate 10 reads the electric signal from first sensor 17; When change-over switch 9 is rotated and switched to pressure survey transmission channel, signal processing circuit plate 10 reads the electric signal from the second sensor 18; Change-over switch 9 is rotated and is switched to pressure differential pressure when measuring transmission channel simultaneously, and signal processing circuit plate 10 reads the electric signal from first sensor 17, second sensor 18 simultaneously.
Above-mentioned pressure difference transmitter, can differential pressure in independent measurement flow field or pressure, also can measure the differential pressure in flow field and pressure simultaneously.
When measuring the differential pressure in flow field, the high-pressure side of surveying instrument (as Pitot tube), low pressure end are connected respectively to the first pressurization mouth 1, second pressurization mouth 2, close the isolation valve 20 in conductive channel 23, medium enters the first guiding channel 11, second guiding channel 21 respectively by the first pressurization mouth 1, second pressurization mouth 2, at two pressure chambers that first sensor 17 both sides mineralization pressure is different, first sensor 17 produces electric signal because both sides are subject to different pressure effects.Rotating change-over switch 9 and select differential pressure measurement transmission channel, the electric signal input signal processing circuitry plate 10 produced by first sensor 17, after signal transacting completes, passing to host computer through exporting cable 14.
When measuring the pressure in flow field, close the isolation valve 20 in conductive channel 23,4th pressurization mouth 4 seals, be vacuum medium in 4th guiding channel 41, the medium delivery outlet of surveying instrument (as Pitot tube) is connected to the 3rd pressurization mouth 3, enter the 3rd guiding channel 31 by the 3rd pressurization mouth 3, at two pressure chambers that the second sensor 18 both sides mineralization pressure is different, the second sensor 18 both sides produce electric signal because being subject to different pressure effects.Owing to being vacuum state in the 4th guiding channel 41, the pressure differential of the second sensor 18 both sides is the pressure of the medium delivery outlet of instrument to be measured.Rotating change-over switch 9 selection pressure and measure transmission channel, the electric signal input signal processing circuitry plate 10 produced by the second sensor 18, after signal transacting completes, passing to host computer through exporting cable 14.
Need to carry out pressure and differential pressure when measuring simultaneously, 4th pressurization mouth 4 seals, be vacuum medium in 4th guiding channel 41, with sealing-plug sealing the 3rd pressurization mouth 3, two medium delivery outlets (high-pressure side, low pressure end) of surveying instrument (as Pitot tube) are connected respectively to the first pressurization mouth 1, second to pressurize on mouth 2, wherein need the medium delivery outlet measuring pressure to be connected on the second pressurization mouth 2.Open isolation valve 20, the second guiding channel 21 and the 3rd guiding channel 31 are communicated, and such first sensor 17 can measure differential pressure, and the second sensor 18 can measure pressure.Change-over switch 9 rotates to pressure differential pressure measures transmission channel simultaneously, the electric signal transmission produced by first sensor 17, second sensor 18 is to signal processing circuit plate 10, passing to host computer through exporting cable 14 after signal transacting completes, measuring while pressure and differential pressure can be realized.
Above-mentioned pressure difference transmitter is also provided with first sensor base 5, first sensor base 5 is provided with first sensor standing groove 7, first sensor 17 is placed in first sensor standing groove 7, first guiding channel 11, second guiding channel 21 is positioned at first sensor base 5, first the pressurize live end of mouth 2 of mouth 1, second that pressurizes and extend out to the outside of first sensor base 5.First sensor base 5, first sensor standing groove 7 play the effect positioning first sensor 17, first guiding channel 11, second guiding channel 21, first pressurization mouth 1 and the second pressurization mouth 2, protect.
Above-mentioned pressure difference transmitter is also provided with the second sensor base 6, second sensor base 6 is provided with the second sensor standing groove 8, second sensor 18 is placed in the second sensor standing groove 8,3rd guiding channel 31, the 4th guiding channel 41 are positioned at the second sensor base the 6, three pressurization mouth 3, the live end of the 4th pressurization mouth 4 extend out to the outside of the second sensor base 6.Second sensor base 6, second sensor standing groove 8 plays the effect positioning the second sensor 18, the 3rd guiding channel 31, the 4th guiding channel 41, the 3rd pressurization mouth 3 and the 4th pressurization mouth 4, protect.
Signal processing circuit plate 10 is fixed in insulation booth 12.Insulation booth 12 plays the effect of locating signal processing circuit plate 10, protecting.
The most external of above-mentioned pressure difference transmitter is provided with shell 22, and the live end of the first pressurization mouth 1, second pressurization mouth 2, the 3rd pressurization mouth 3 and the 4th pressurization mouth 4 extend out to the outside of shell 22, and the output terminal exporting cable 14 also extend out to the outside of shell 22.Wherein, the output terminal cover exporting cable 14 has water joint 13, and water joint 13 is arranged on shell 22, and water joint 13 plays the effect of protection to exporting cable 14.
First sensor 17 is connected with change-over switch 9 by first sensor winding displacement 15, second sensor 18 is connected with change-over switch 9 by the second sensor winding displacement 16, exports winding displacement 19 be connected between change-over switch 9 with signal processing circuit plate 10 by change-over switch.
Use above-mentioned pressure difference transmitter to test the method for differential pressure, specifically comprise the following steps:
1) isolation valve 20 in conductive channel 23 is closed;
2) two of instrument to be measured medium delivery outlets being connected respectively to the first pressurization mouth 1, second pressurizes on mouth 2;
3) rotate change-over switch 9, switch to the state of the electric signal reading first sensor 17;
4), in the electric signal input signal processing circuitry plate 10 that first sensor 17 produces, after having processed, host computer is passed to through exporting cable 14.
Use above-mentioned pressure difference transmitter to measure the method for pressure, specifically comprise the following steps:
1) isolation valve 20 in conductive channel 23 is closed;
2) the 4th pressurization mouth 4 seals, and is vacuum in the 4th guiding channel 41;
3) the medium delivery outlet of instrument to be measured is connected on the 3rd pressurization mouth 3;
4) rotate change-over switch 9, switch to the electric signal of reading second sensor 18;
5), in the electric signal input signal processing circuitry plate 10 that the second sensor 18 produces, after having processed, host computer is passed to through exporting cable 14.
Use the method for above-mentioned pressure difference transmitter simultaneously measure differences in pressure pressure, specifically comprise the following steps:
1) open the isolation valve 20 in conductive channel 23, make the second guiding channel 21 and the 3rd guiding channel 31 conducting;
2) the 3rd pressurization mouth 3, the 4th pressurization mouth 4 seal, and are vacuum in the 4th guiding channel 41;
3) two of instrument to be measured medium delivery outlets are connected respectively to the first pressurization mouth 1, second to pressurize on mouth 2, one of them needs the medium delivery outlet of test pressure to be connected on the second pressurization mouth 2;
4) rotate change-over switch 9, switch to the state of the electric signal simultaneously reading first sensor 17, second sensor 18;
5), in the electric signal input signal processing circuitry plate 10 that first sensor 17, second sensor 18 produces, after having processed, host computer is passed to through exporting cable 14.
Above-mentioned pressure difference transmitter, whole transmitter parts are few, and structure is simple, and easy making process is easy to assembly; And diverse in function, easy to operate, have the function measuring pressure and differential pressure, and can realize the synchro measure of pressure, differential pressure, each function switches easy.This transmitter is applicable to the fields such as electric power, food, chemical industry, HVAC, environmental protection, can carry out the reliable measurements of differential pressure, pressure to liquid noncorrosive in production run, gas or steam.
In sum, the switchable pressure difference transmitter of the utility model, structure is simple, reliable and stable, measuring accuracy is high, can realize differential pressure and pressure in industrial process and measure individually or simultaneously, is applicable to the measurement of non-corrosive liquid in pipeline or flow field, gas or steam differential pressure and pressure.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (6)
1. a switchable pressure difference transmitter, is characterized in that: described transmitter comprises first sensor, the second sensor;
One pressure sensitive side of described first sensor is communicated with by the first guiding channel and first mouth that pressurizes, and another pressure sensitive side of described first sensor is passed through the second guiding channel and second mouth that pressurizes and is communicated with;
One pressure sensitive side of described second sensor is communicated with by the 3rd guiding channel and the 3rd mouth that pressurizes, and another pressure sensitive side of described second sensor is passed through the 4th guiding channel and the 4th mouth that pressurizes and is communicated with;
Be provided with conductive channel between described second guiding channel and the 3rd guiding channel, described conductive channel is provided with isolation valve;
The signal output part of described first sensor, the signal output part of the second sensor are all connected with change-over switch, described change-over switch can select the electric signal reading first sensor, the second sensor individually or simultaneously, described change-over switch is connected with signal processing circuit plate, described signal processing circuit plate is connected with output cable, and described output cable is connected with host computer.
2. switchable pressure difference transmitter according to claim 1, it is characterized in that: described transmitter is provided with first sensor base, described first sensor base is provided with first sensor standing groove, described first sensor is placed in described first sensor standing groove, described first guiding channel, the second guiding channel are positioned at described first sensor base, and the live end of described first pressurization mouth, the second pressurization mouth extend out to the outside of described first sensor base.
3. switchable pressure difference transmitter according to claim 1, it is characterized in that: described transmitter is provided with the second sensor base, described second sensor base is provided with the second sensor standing groove, described second sensor is placed in described second sensor standing groove, described 3rd guiding channel, the 4th guiding channel are positioned at described second sensor base, and the live end of described 3rd pressurization mouth, the 4th pressurization mouth extend out to the outside of described second sensor base.
4. switchable pressure difference transmitter according to claim 1, is characterized in that: described signal processing circuit plate is fixed in insulation booth.
5. the switchable pressure difference transmitter according to any one of Claims 1-4, it is characterized in that: the most external of described transmitter is provided with shell, the live end of described first pressurization mouth, the second pressurization mouth, the 3rd pressurization mouth and the 4th pressurization mouth extend out to the outside of described shell, and the output terminal of described output cable also extend out to the outside of described shell.
6. switchable pressure difference transmitter according to claim 5, is characterized in that: the output terminal cover of described output cable has water joint, and described water joint is installed on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852622.2U CN204346469U (en) | 2014-12-23 | 2014-12-23 | Switchable pressure difference transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852622.2U CN204346469U (en) | 2014-12-23 | 2014-12-23 | Switchable pressure difference transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204346469U true CN204346469U (en) | 2015-05-20 |
Family
ID=53229731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420852622.2U Withdrawn - After Issue CN204346469U (en) | 2014-12-23 | 2014-12-23 | Switchable pressure difference transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204346469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783958A (en) * | 2014-12-23 | 2016-07-20 | 国核电站运行服务技术有限公司 | Switchable pressure/different pressure transmitter and method for using same |
| CN110646696A (en) * | 2019-10-08 | 2020-01-03 | 扬州市君瑞企业管理有限公司 | Sensor on-line isolation conduction device under pressure |
-
2014
- 2014-12-23 CN CN201420852622.2U patent/CN204346469U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783958A (en) * | 2014-12-23 | 2016-07-20 | 国核电站运行服务技术有限公司 | Switchable pressure/different pressure transmitter and method for using same |
| CN105783958B (en) * | 2014-12-23 | 2018-04-17 | 国核电站运行服务技术有限公司 | Changeable pressure difference transmitter and application method |
| CN110646696A (en) * | 2019-10-08 | 2020-01-03 | 扬州市君瑞企业管理有限公司 | Sensor on-line isolation conduction device under pressure |
| CN110646696B (en) * | 2019-10-08 | 2021-08-17 | 扬州市君瑞企业管理有限公司 | Sensor on-line isolation conduction device under pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20180417 |
|
| AV01 | Patent right actively abandoned |