CN109163844B - Digital pressure check box - Google Patents
Digital pressure check box Download PDFInfo
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- CN109163844B CN109163844B CN201811288440.6A CN201811288440A CN109163844B CN 109163844 B CN109163844 B CN 109163844B CN 201811288440 A CN201811288440 A CN 201811288440A CN 109163844 B CN109163844 B CN 109163844B
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- pressure
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- valve
- box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The digital pressure checking box comprises a box body and a box cover, wherein a connecting piece is arranged at the joint of the box body and the box cover, a pressure cavity is arranged in the box body, a pressure accumulation chamber, a pressure stabilizing chamber, a storage battery and a control processor are arranged in the pressure cavity, the pressure accumulation chamber and the pressure stabilizing chamber are connected through a pressure stabilizing adjusting valve, the storage battery is respectively and electrically connected with the pressure accumulation chamber and the pressure stabilizing chamber, and the control processor is respectively and communicatively connected with the pressure accumulation chamber and the pressure stabilizing chamber; a display screen is arranged on the inner side of the box cover, and the control processor is in communication connection with the display screen; the control button plate, the data interface and the measurement port are all connected with the control processor, and the check port is connected with the pressure accumulation chamber pipeline; according to the invention, the pressure of the pressure accumulation chamber and the pressure stabilizing chamber is more stable through two pressure stabilizing treatments of the pressure stabilizing regulating valve and the pressure stabilizing output valve, so that the stability and the accuracy of the self pressure of the check box are improved.
Description
Technical Field
The invention relates to the field of pressure checking devices, in particular to a digital pressure checking box.
Background
The existing pressure check gauge, the main structure comprises force (forcing) pump, pressure output end and dial gauge type instrumentation, and there are a lot of problems in the pressure check gauge of this kind of structure when using, for example: the function is single, only the pressure can be checked for use, and other contents can not be detected; the structure is complex, the volume is large, the carrying is inconvenient, and the use is very troublesome during the on-site verification; checking data, wherein a user is required to manually read and record, the result cannot be automatically recorded, and the detection result is easily affected by manpower; the provided pressure is not easy to control, the pressure output fluctuation is large, the pressure is unstable, and the verification accuracy is low; the invention improves on the basis of the prior art, and provides a digital pressure check box which can well overcome the problems.
Disclosure of Invention
The invention mainly aims to enable output pressure to be more stable and provides a digital pressure check box.
In order to achieve the technical purpose, the invention adopts the following technical scheme: the digital pressure checking box comprises a box body and a box cover, wherein a connecting piece is arranged at the joint of the box body and the box cover, a pressure cavity is arranged in the box body, a pressure accumulation chamber, a pressure stabilizing chamber, a storage battery and a control processor are arranged in the pressure cavity, the pressure accumulation chamber and the pressure stabilizing chamber are connected through a pressure stabilizing adjusting valve, the storage battery is respectively and electrically connected with the pressure accumulation chamber and the pressure stabilizing chamber, and the control processor is respectively and communicatively connected with the pressure accumulation chamber and the pressure stabilizing chamber; the pressure stabilizing chamber is internally provided with a pressure stabilizing output valve and a first pressure relief valve, the pressure stabilizing output valve is positioned at one side edge of the pressure stabilizing chamber and led to the outside of the box body, the pressure accumulating chamber is internally provided with an electric air pump and a second pressure relief valve, the pressure stabilizing regulating valve, the pressure stabilizing output valve and the electric air pump are all in communication connection with the control processor, the pressure accumulating chamber and the pressure stabilizing chamber are internally provided with pressure sensors, and the pressure sensor in the pressure accumulating chamber and the pressure sensor in the pressure stabilizing chamber are all in communication connection with the control processor; the display screen is arranged on the inner side of the box cover, the control processor is in communication connection with the display screen, and the display screen is electrically connected with the storage battery; the control button board is in communication connection with the control processor, the data interface and the measurement port are both connected with the control processor, and the check port is connected with the pressure accumulation chamber pipeline.
Preferably, the control processor is AT89C2051.
Preferably, the box body is provided with a temperature and air pressure sensor which is in communication connection with the control processor.
Preferably, the model of the temperature sensor is WRM-101.
Preferably, a storage cavity is further arranged in the box body, the storage cavity and the pressure cavity are arranged in parallel, and the storage cavity is provided with a cavity cover.
Preferably, the measuring port comprises a voltage and current measuring end and a voltage output end, and the voltage and current measuring end and the voltage output end are electrically connected with the control processor.
Preferably, the outer surface of the box cover is hinged with a bracket, the bracket comprises an upper bracket and a lower bracket, the upper bracket is connected with the lower bracket in a matched mode, the lower bracket can stretch into the upper bracket, a groove is formed in the box cover, and the bracket can be stored in the groove.
Preferably, the bracket is hollow cylindrical.
Preferably, the electric air pump is provided with an air inlet, a filter screen is arranged in the air inlet, the pressure stabilizing output valve, the first pressure relief valve and the second pressure relief valve are all provided with an external air port, and the external air port and the air inlet are all provided with protective covers.
Preferably, the connecting piece is a lock catch.
Preferably, the pressure sensor is of the type PT503Z-25MP.
Preferably, the pressure stabilizing and regulating valve is a ZZY-type self-operated pressure regulating valve; the pressure stabilizing output valve is a 200P pressure reducing valve with a filter screen.
Preferably, a handle is fixedly arranged beside the connecting piece.
The invention has the technical effects and advantages that: according to the invention, the pressure of the output is more stable through two pressure stabilizing treatments of the pressure-stabilizing regulating valve and the pressure-stabilizing output valve, so that the stability and accuracy of the self pressure of the check box are improved; compared with the traditional dial type instrument, the display screen has more visual and accurate degrees; the arrangement of the lock catch and the handle enables the box to be convenient to move and carry, and the bracket can flexibly adjust the opening angle of the box cover along with actual use, so that the display screen is in a position convenient for a user to check; the storage cavity can be used for placing some standby tools, such as a current and voltage wire clamp, a standardized instrument and the like, and is convenient to use, so that the function of the check box is more complete; the filter screen is arranged at the air inlet to block dust and water vapor, so that the air entering the pressure accumulation chamber is dried without impurities, the verification accuracy is improved, and the water vapor corrosion and oxidation inside the pressure accumulation chamber and the pressure stabilizing chamber are prevented; when the check box is not used, the protective cover can prevent the external vapor and air from slowly oxidizing and corroding the air inlet and the external air outlet; a calibration tool such as a standard calibration meter can be inserted into the calibration port, so that the self-checking adjustment of the calibration box is convenient in real time, and the calibration accuracy of the calibration box is improved; when the voltage and current measuring end is used for verifying the pressure device to be tested, the voltage and current value can be additionally measured, and the verification accuracy is improved; the voltage output end can provide voltage output to the outside, so that the verification work is convenient to carry out; the temperature and pressure sensor can sense the temperature and pressure of the current external space, and the control processor performs temperature feedback processing according to the current temperature during processing control, so that accuracy is improved; the invention has simple structure, easily understood principle, strong practicability and good application prospect.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the interior of the pressure chamber of the present invention;
FIG. 3 is a schematic view of the present invention in use with a stent.
1. A case; 2. a case cover; 21. a groove; 3. a handle; 4. a connecting piece; 5. a display screen; 6. a control button plate; 7. a storage cavity; 8. Checking a port; 9. a pressure chamber; 10. a pressure accumulation chamber; 11. a pressure stabilizing chamber; 12. an electric air pump; 13. a pressure stabilizing regulating valve; 14. a regulated output valve; 15. a first pressure relief valve; 16. a data interface; 17. and a second pressure release valve.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a digital pressure checking box as shown in the preferred embodiment of fig. 1 to 3, which comprises a box body 1 and a box cover 2, wherein a connecting piece 4 is arranged at the joint of the box body 1 and the box cover 2, the connecting piece 4 is a lock catch, a handle 3 is fixedly arranged beside the connecting piece 4, a bracket is hinged to the outer surface of the box cover 2, the bracket comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are connected in a matched manner, the bracket is telescopic, the lower bracket can be telescopic into the upper bracket, a groove 21 is formed in the box cover 2, the bracket can be accommodated into the groove 21, and the bracket is hollow and cylindrical; the pressure chamber 9 is arranged in the box body 1, the pressure chamber 9 is internally provided with a pressure accumulating chamber 10, a pressure stabilizing chamber 11, a storage battery and a control processor, the model of the control processor is AT89C2051, the pressure accumulating chamber 10 and the pressure stabilizing chamber 11 are connected through a pressure stabilizing regulating valve 13, the storage battery is respectively and electrically connected with the pressure accumulating chamber 10 and the pressure stabilizing chamber 11, and the control processor is respectively and communicatively connected with the pressure accumulating chamber 10 and the pressure stabilizing chamber 11; the pressure stabilizing chamber 11 is internally provided with a pressure stabilizing output valve 14 and a first pressure relief valve 15, the pressure stabilizing output valve 14 is positioned at one side edge of the pressure stabilizing chamber 11 and led to the outer side of the box body 1, the pressure accumulating chamber 10 is internally provided with an electric air pump 12 and a second pressure relief valve 17, the pressure stabilizing regulating valve 13, the pressure stabilizing output valve 14 and the electric air pump 12 are all provided with signal receiving modules, the pressure stabilizing regulating valve 13, the pressure stabilizing output valve 14 and the electric air pump 12 are all in communication connection with a control processor, and the pressure stabilizing regulating valve is a ZZY type self-operated pressure regulating valve; the pressure stabilizing output valve is a 200P pressure reducing valve with a filter screen; the electric air pump 12 is provided with an air inlet, a filter screen is arranged in the air inlet, the pressure stabilizing output valve, the first pressure relief valve and the second pressure relief valve are all provided with an external air port, the external air port and the air inlet are all provided with protective covers, and the pressure of the pressure accumulating chamber and the pressure stabilizing chamber is subjected to two pressure stabilizing treatments of the pressure stabilizing regulating valve and the pressure stabilizing output valve, so that the output pressure is more stable; the pressure accumulation chamber 10 and the pressure stabilizing chamber 11 are respectively provided with a pressure sensor, the pressure sensor in the pressure accumulation chamber 10 and the pressure sensor in the pressure stabilizing chamber 11 are respectively in communication connection with a control processor, and the types of the pressure sensors are PT503Z-25MP; the inner side of the box cover 2 is provided with a display screen 5, the control processor is in communication connection with the display screen 5, and the display screen 5 is electrically connected with the storage battery; the box body 1 is internally provided with a control button plate 6, a data interface 16, a check port 8 and a measurement port, wherein the control button plate 6, the data interface 16 and the measurement port are all connected with a control processor, and specifically, the control button plate 6, the data interface 16 and the measurement port are all in communication connection with the control processor, the check port 8 is in pipeline connection with the pressure accumulation chamber 10, the measurement port comprises a voltage and current measurement end and a voltage output end, and the voltage and current measurement end and the voltage output end are all electrically connected with the control processor; the box body 1 is internally provided with a storage cavity 7, the storage cavity 7 and a pressure cavity 9 are arranged in parallel, and the storage cavity 7 is provided with a cavity cover; the box body 1 is provided with a temperature sensor, the temperature sensor is in communication connection with the control processor, and the model of the temperature sensor is WRM-101.
The use principle and the method are as follows: the connector 4 is released, the case cover 2 is opened, the bracket is adjusted to rotate out of the groove at the outer side of the case cover 2, the bracket is adjusted, the case cover 2 is in a proper use angle, the protective covers of the air outlet and the air inlet are opened, the control button plate 6 is controlled, the power supply and the control processor are started, the display screen 5 displays data measured by the pressure sensor and the temperature and air pressure sensor, the data on the display screen 5 comprises the air pressure of the pressure accumulating chamber 10, the air pressure of the pressure stabilizing chamber 11 and the temperature and air pressure of the current external environment, the initial adjustment and the self-check are carried out according to the obtained data, the first pressure relief valve 15 and the second pressure relief valve 17 are screwed up after the check adjustment is finished, the pressure stabilizing output valve 14 and the voltage and current measuring end are externally connected with the pressure device to be tested, after connection, corresponding signals are sent to a control processor through the control button plate 6, the control processor sends out signals, the electric air pump 12, the voltage stabilizing regulating valve 13 and the voltage stabilizing output valve 14 receive corresponding signals and work, at the moment, the pressure value in the corresponding pressure accumulating chamber 10 and the voltage stabilizing chamber 11 and the voltage current value of the pressure device to be measured are displayed on the display screen 5, data obtained by comparing the pressure device to be measured are recorded, whether errors exist in the pressure device to be measured or not is obtained, verification is completed, the control button plate 6 is controlled, the electric air pump 12, the voltage stabilizing regulating valve 13 and the voltage stabilizing output valve 14 stop working, the pressure releasing valve 15 is opened, high-pressure gas is released, and when the pressure in the pressure accumulating chamber 10 and the voltage stabilizing chamber 11 is consistent with the outside, the protective cover is closed.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (12)
1. The utility model provides a digital pressure check-up case, includes box (1) and case lid (2), box (1) are equipped with connecting piece (4) with case lid (2) junction, its characterized in that:
the pressure-stabilizing device is characterized in that a pressure cavity (9) is arranged in the box body (1), a pressure accumulating chamber (10), a pressure stabilizing chamber (11), a storage battery and a control processor are arranged in the pressure cavity (9), the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) are connected through a pressure stabilizing adjusting valve (13), the storage battery is respectively and electrically connected with the pressure accumulating chamber (10) and the pressure stabilizing chamber (11), and the control processor is respectively and communicatively connected with the pressure accumulating chamber (10) and the pressure stabilizing chamber (11); a pressure stabilizing output valve (14) and a first pressure relief valve (15) are arranged in the pressure stabilizing chamber (11), the pressure stabilizing output valve (14) is positioned at one side of the pressure stabilizing chamber (11) and led to the outer side of the box body (1), an electric air pump (12) and a second pressure relief valve (17) are arranged in the pressure accumulating chamber (10), the pressure stabilizing regulating valve (13), the pressure stabilizing output valve (14) and the electric air pump (12) are all in communication connection with a control processor, pressure sensors are arranged in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11), and the pressure sensors in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) are all in communication connection with the control processor; a display screen (5) is arranged on the inner side of the box cover (2), the control processor is in communication connection with the display screen (5), and the display screen (5) is electrically connected with the storage battery; a control button plate (6), a data interface (16), a check port (8) and a measurement port are also arranged in the box body (1), the control button plate (6) is in communication connection with the control processor, the data interface (16) and the measurement port are both connected with the control processor, and the check port (8) is in pipeline connection with the pressure accumulation chamber (10);
the electric air pump (12) is provided with an air inlet, and the pressure stabilizing output valve, the first pressure relief valve and the second pressure relief valve are all provided with an external air port;
the measuring port comprises a voltage and current measuring end and a voltage output end, and the voltage and current measuring end and the voltage output end are electrically connected with the control processor;
during verification, the connecting piece (4) is loosened, the box cover (2) is opened, the first pressure relief valve (15) and the second pressure relief valve (17) are screwed, the voltage-stabilizing output valve (14) and the voltage and current measuring end are externally connected with a pressure device to be tested, the processor is controlled to send out signals through the control button plate (6), the electric air pump (12), the voltage-stabilizing regulating valve (13) and the voltage-stabilizing output valve (14) are controlled to work, the pressure value of the pressure accumulation chamber (10), the pressure value of the pressure stabilization chamber (11) and the voltage and current value of the pressure device to be tested displayed on the display screen (5) are recorded, and data obtained by comparing the pressure device to be tested are recorded and compared to obtain whether the pressure device to be tested has errors;
after the verification is finished, the control button plate (6) is controlled, the electric air pump (12), the pressure stabilizing regulating valve (13) and the pressure stabilizing output valve (14) are controlled to stop working, and the pressure release valve is opened to release high-pressure gas, so that the pressure in the pressure accumulating chamber (10) and the pressure stabilizing chamber (11) is consistent with the outside.
2. The digital pressure check box of claim 1, wherein: the model of the control processor is AT89C2051.
3. The digital pressure check box of claim 2, wherein: the box body (1) is provided with a temperature sensor which is in communication connection with the control processor.
4. A digital pressure check box according to claim 3, wherein: the model of the temperature sensor is WRM-101.
5. The digital pressure check box of claim 4, wherein: the box body (1) is also internally provided with a storage cavity (7), the storage cavity (7) and the pressure cavity (9) are arranged in parallel, and the storage cavity (7) is provided with a cavity cover.
6. The digital pressure check box of claim 1, wherein: the outer surface of the box cover (2) is hinged with a support, the support comprises an upper support and a lower support, the upper support is connected with the lower support in a matched mode, the lower support can stretch into the upper support, a groove (21) is formed in the box cover (2), and the support can be stored in the groove (21).
7. The digital pressure check box of claim 6, wherein: the support is hollow cylindrical.
8. The digital pressure check box of claim 7, wherein: a filter screen is arranged in the air inlet, and protective covers are arranged on the external air inlet and the air inlet.
9. The digital pressure check box of claim 8, wherein: the connecting piece (4) is a lock catch.
10. The digital pressure check box of claim 9, wherein: the pressure sensor is of the model PT503Z-25MP.
11. The digital pressure check box of claim 10, wherein: the pressure stabilizing regulating valve is a ZZY type self-operated pressure regulating valve; the pressure stabilizing output valve is a 200P pressure reducing valve with a filter screen.
12. A digital pressure check box according to any of claims 1-11, wherein: a handle (3) is fixedly arranged beside the connecting piece (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811288440.6A CN109163844B (en) | 2018-10-31 | 2018-10-31 | Digital pressure check box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811288440.6A CN109163844B (en) | 2018-10-31 | 2018-10-31 | Digital pressure check box |
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| Publication Number | Publication Date |
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| CN109163844A CN109163844A (en) | 2019-01-08 |
| CN109163844B true CN109163844B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811288440.6A Active CN109163844B (en) | 2018-10-31 | 2018-10-31 | Digital pressure check box |
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| CN (1) | CN109163844B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501037B (en) * | 2019-09-16 | 2024-03-29 | 国网江苏省电力有限公司泰州供电分公司 | Verification clamping device and verification method for temperature and humidity sensor of Internet of things of power equipment |
| CN112103806B (en) * | 2020-08-28 | 2022-04-15 | 国网江苏省电力有限公司泰州供电分公司 | Block terminal is from pressure release protection architecture |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202002772U (en) * | 2011-02-21 | 2011-10-05 | 江苏杰克仪表有限公司 | Portable pressure calibrator |
| CN103267608A (en) * | 2013-05-31 | 2013-08-28 | 南京化工职业技术学院 | Portable pressure instrument calibrator |
| CN204422137U (en) * | 2015-03-17 | 2015-06-24 | 北京海洋兴业科技有限公司 | A kind of field digital pressure checking equipment |
| CN104929920A (en) * | 2015-06-29 | 2015-09-23 | 无锡商业职业技术学院 | Crankshaft connecting-rod type variable load compressor for air conditioning system |
| CN206608238U (en) * | 2017-02-16 | 2017-11-03 | 佛山市南海奉卓节能环保科技有限公司 | A kind of petrol engine dynamic cleaning device |
| CN207420628U (en) * | 2017-11-20 | 2018-05-29 | 湖北金盛兰冶金科技有限公司 | A kind of steam engine using sintering machine waste heat |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252805B (en) * | 2011-05-26 | 2013-01-02 | 北京康斯特仪表科技股份有限公司 | Multi-range field full-automatic pressure and electric signal calibrating instrument |
| CN208833438U (en) * | 2018-10-31 | 2019-05-07 | 江苏方天电力技术有限公司 | A kind of digital pressure checking box |
-
2018
- 2018-10-31 CN CN201811288440.6A patent/CN109163844B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202002772U (en) * | 2011-02-21 | 2011-10-05 | 江苏杰克仪表有限公司 | Portable pressure calibrator |
| CN103267608A (en) * | 2013-05-31 | 2013-08-28 | 南京化工职业技术学院 | Portable pressure instrument calibrator |
| CN204422137U (en) * | 2015-03-17 | 2015-06-24 | 北京海洋兴业科技有限公司 | A kind of field digital pressure checking equipment |
| CN104929920A (en) * | 2015-06-29 | 2015-09-23 | 无锡商业职业技术学院 | Crankshaft connecting-rod type variable load compressor for air conditioning system |
| CN206608238U (en) * | 2017-02-16 | 2017-11-03 | 佛山市南海奉卓节能环保科技有限公司 | A kind of petrol engine dynamic cleaning device |
| CN207420628U (en) * | 2017-11-20 | 2018-05-29 | 湖北金盛兰冶金科技有限公司 | A kind of steam engine using sintering machine waste heat |
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