CN112581845A - A differential pressure transmitter calibration equipment for teaching - Google Patents
A differential pressure transmitter calibration equipment for teaching Download PDFInfo
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- CN112581845A CN112581845A CN201910932520.9A CN201910932520A CN112581845A CN 112581845 A CN112581845 A CN 112581845A CN 201910932520 A CN201910932520 A CN 201910932520A CN 112581845 A CN112581845 A CN 112581845A
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- differential pressure
- pressure transmitter
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- water injection
- injection bucket
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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- Theoretical Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a differential pressure transmitter calibration device for teaching, which comprises a differential pressure transmitter and a water injection bucket, wherein the differential pressure transmitter is fixedly arranged on a movable support, the side wall of the water injection bucket is sequentially provided with a plurality of water outlets from top to bottom, each water outlet comprises a stop valve and a quick connection plug, the positive electrode and the negative electrode of the differential pressure transmitter are respectively connected with the water outlets through plastic hoses, the outer wall of the water injection bucket is provided with a scale, the top of the water injection bucket is provided with a water inlet, and the bottom of the water injection bucket is provided with a water outlet valve, the differential pressure transmitter calibration device has the beneficial effects: the check of each check point can be realized through the arrangement of the water filling port and the water discharging port; meanwhile, the measuring liquid level change state during teaching can be more intuitively and vividly solved by utilizing simple physical phenomena.
Description
Technical Field
The invention relates to the technical field of differential pressure transmitter calibration, in particular to a differential pressure transmitter calibration device and method for teaching.
Background
The differential pressure transmitter is widely used in the process industry, the calibration work is particularly important, at present, in the teaching process, two common calibration methods of the differential pressure transmitter are adopted, under 0.6MPa, compressed air is used as a pressure source, the pressure source is higher than 0.6MPa, and a piston type device is used for pressurizing transformer oil to be used as the pressure source to calibrate the differential pressure transmitter.
In the method, when the differential pressure transmitter is used for detecting the liquid level, the pressure value of the check point cannot be intuitively corresponding to the liquid level value. Especially, when the check point relates to the migration problem, the beginner is difficult to understand.
Disclosure of Invention
The invention aims to provide a differential pressure transmitter calibration device and method for teaching, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a differential pressure transmitter calibration equipment for teaching, includes differential pressure transmitter and notes cask, differential pressure transmitter fixed mounting is on the movable support, the lateral wall of notes cask is from last to having seted up a plurality of outlet down in proper order, the outlet contains stop valve and quick-connect plug, differential pressure transmitter's positive negative pole all connects the outlet respectively through plastic hose, be provided with the scale on the outer wall of notes cask, the top of notes cask is provided with the water inlet, the bottom of notes cask is provided with the outlet valve.
Preferably, the bottom fixed mounting of notes cask has the support, it lifts up through the support to annotate the cask, just the height of the bottom support of notes cask is greater than the height of differential pressure transmitter bottom movable support.
Preferably, the number of the water outlets is not less than four groups, wherein one group is arranged at the position close to the top of the water injection barrel, and the other three groups are arranged at the position close to the bottom of the water injection barrel.
Preferably, the other end of the plastic hose connected with the negative electrode of the differential pressure transmitter is fixedly connected with a water outlet at the top of the water injection bucket, and the other end of the plastic hose connected with the positive electrode of the differential pressure transmitter is fixedly connected with a water outlet at the bottom of the water injection bucket.
Preferably, the differential pressure transmitter is electrically connected with a standard meter and a display meter, wherein the standard meter and the display meter are both externally connected with a power supply.
A differential pressure transmitter calibration method for teaching,
the method comprises the following steps: fixing the differential pressure transmitter 1 at a proper height of the movable support 3, and connecting the differential pressure transmitter with a standard meter 11, a display meter 12 and a power supply through a lead;
step two: connecting a pressure measuring port of the differential pressure transmitter with a quick plug of a pressure measuring point of the water injection barrel 2 through a plastic hose, and opening a corresponding stop valve 5;
step three: then the water outlet valve 10 is closed; opening the water inlet 9, injecting water into the water injection barrel 2 and discharging air;
step four: then, the water level in the water injection bucket 2 is enabled to be at a zero position by adjusting the water outlet valve 10 and the water inlet 9;
step five: observing the number indicated by the standard meter 11, and judging whether the number is 4 milliamperes or not, if not, adjusting a zero setting knob of the differential pressure transmitter 1 until the real number of the standard meter 12 is 4 milliamperes;
step six: the liquid level of the water injection bucket 2 is at a full range level by adjusting the water outlet valve 10 and the water inlet 9;
step seven: observing the number of the standard meter 11, and judging whether the number is 20 milliamperes or not, if not, adjusting a measuring range knob of the differential pressure transmitter 1 until the real number of the standard meter 11 is 20 milliamperes;
step eight: repeating the third step to the sixth step until the error is within an allowable range;
step nine: the liquid level of the water injection barrel 2 is respectively in the positions of 0%, 25%, 50%, 75% and 100% of the measuring range by adjusting the water outlet valve 10 and the water inlet 9, and then the forward stroke and the reverse stroke check of the differential pressure transmitter 1 are completed.
Compared with the prior art, the invention has the beneficial effects that: the check of each check point can be realized through the arrangement of the water filling port and the water discharging port; meanwhile, the measuring liquid level change state during teaching can be more intuitively and vividly solved by utilizing simple physical phenomena.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1 differential pressure transmitter, 2 water injection buckets, 3 movable supports, 4 water outlets, 5 stop valves, 6 quick connecting plugs, 7 plastic hoses, 8 graduated scales, 9 water inlets, 10 water outlet valves, 11 standard meters and 12 display meters.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a differential pressure transmitter calibration equipment for teaching, includes differential pressure transmitter 1 and water injection bucket 2, 1 fixed mounting of differential pressure transmitter is on movable support 3, a plurality of outlet 4 have been seted up to down in proper order from last to the lateral wall of water injection bucket 2, outlet 4 contains stop valve 5 and quick connector plug 6, differential pressure transmitter 1's positive negative pole all connects the drainage mouth 4 respectively through plastic hose 7, be provided with scale 8 on the outer wall of water injection bucket 2, the top of water injection bucket 2 is provided with water inlet 9, the bottom of water injection bucket 2 is provided with outlet valve 10.
It is worth noting that a support is fixedly installed at the bottom of the water injection barrel 2, the water injection barrel 2 is lifted up through the support, and the height of the support at the bottom of the water injection barrel 2 is larger than that of the movable support 3 at the bottom of the differential pressure transmitter 1.
The number of the water outlets 4 is not less than four groups, wherein one group is arranged at the position close to the top of the water injection bucket 2, and the other three groups are arranged at the position close to the bottom of the water injection bucket 2.
The other end of the plastic hose 7 connected with the negative electrode of the differential pressure transmitter 1 is fixedly connected with the water outlet 4 at the top of the water injection bucket 2, and the other end of the plastic hose 7 connected with the positive electrode of the differential pressure transmitter 1 is fixedly connected with the water outlet 4 at the bottom of the water injection bucket 2.
It should be noted that the differential pressure transmitter 1 is electrically connected to a standard meter and a display meter, wherein the standard meter 11 and the display meter 12 are both externally connected to a power supply.
A differential pressure transmitter calibration method for teaching,
the method comprises the following steps: fixing the differential pressure transmitter 1 at a proper height of the movable support 3, and connecting the differential pressure transmitter with a standard meter 11, a display meter 12 and a power supply through a lead;
step two: connecting a pressure measuring port of the differential pressure transmitter with a quick plug of a pressure measuring point of the water injection barrel 2 through a plastic hose, and opening a corresponding stop valve 5;
step three: then the water outlet valve 10 is closed; opening the water inlet 9, injecting water into the water injection barrel 2 and discharging air;
step four: then, the water level in the water injection bucket 2 is enabled to be at a zero position by adjusting the water outlet valve 10 and the water inlet 9;
step five: observing the number indicated by the standard meter 11, and judging whether the number is 4 milliamperes or not, if not, adjusting a zero setting knob of the differential pressure transmitter 1 until the real number of the standard meter 12 is 4 milliamperes;
step six: the liquid level of the water injection bucket 2 is at a full range level by adjusting the water outlet valve 10 and the water inlet 9;
step seven: observing the number of the standard meter 11, and judging whether the number is 20 milliamperes or not, if not, adjusting a measuring range knob of the differential pressure transmitter 1 until the real number of the standard meter 11 is 20 milliamperes;
step eight: repeating the third step to the sixth step until the error is within an allowable range;
step nine: the liquid level of the water injection barrel 2 is respectively in the positions of 0%, 25%, 50%, 75% and 100% of the measuring range by adjusting the water outlet valve 10 and the water inlet 9, and then the forward stroke and the reverse stroke check of the differential pressure transmitter 1 are completed.
Example (b):
in the second step, different pressure taking points (namely, the soft plastic hose is connected with different water outlets) are selected to demonstrate the change of the migration volume of the differential pressure transmitter under the condition that the installation position of the differential pressure transmitter is not changed;
in the first step, the height of the movable support is adjusted, so that the change condition of the migration volume of the differential pressure transmitter can be demonstrated under the condition that the differential pressure transmitter is at different installation positions (namely installation heights).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a differential pressure transmitter calibration equipment for teaching, includes differential pressure transmitter (1) and water injection bucket (2), its characterized in that: differential pressure transmitter (1) fixed mounting is on movable support (3), a plurality of outlet (4) have been seted up from last to down in proper order to the lateral wall of injection bucket (2), outlet (4) contain stop valve (5) and connect plug (6) soon, outlet (4) are all connected respectively through plastic hose (7) to the positive negative pole of differential pressure transmitter (1), be provided with scale (8) on the outer wall of injection bucket (2), the top of injection bucket (2) is provided with water inlet (9), the bottom of injection bucket (2) is provided with outlet valve (10).
2. The differential pressure transmitter calibration apparatus for teaching of claim 1, wherein: the bottom fixed mounting of notes cask (2) has the support, notes cask (2) lift up through the support, just the height that highly is greater than differential pressure transmitter (1) bottom movable support (3) of the bottom support of notes cask (2), movable support (3) specifically include interior pole and outer pole, adjust and fasten through the locking bolt between interior pole and the outer pole.
3. The differential pressure transmitter calibration apparatus for teaching of claim 1, wherein: the number of the water outlets (4) is not less than four groups, wherein one group is arranged at the position close to the top of the water injection bucket (2), and the other three groups are arranged at the position close to the bottom of the water injection bucket (2).
4. The differential pressure transmitter calibration apparatus for teaching of claim 1, wherein: with other end fixed connection water injection bucket (2) top outlet (4) of the plastic hose (7) that differential pressure transmitter (1) negative pole is connected, with other end fixed connection water injection bucket (2) bottom outlet (4) of the plastic hose (7) that differential pressure transmitter (1) positive pole is connected.
5. The differential pressure transmitter calibration apparatus for teaching of claim 1, wherein: differential pressure transmitter (1) electric connection standard meter (11) and display meter (12), wherein, standard meter (11) and display meter (12) all external power source.
6. A differential pressure transmitter calibration method for teaching specifically comprises the following steps:
the method comprises the following steps: fixing the differential pressure transmitter 1 at a proper height of the movable support 3, and connecting the differential pressure transmitter with a standard meter 11, a display meter 12 and a power supply through a lead;
step two: connecting a pressure measuring port of the differential pressure transmitter with a quick plug of a pressure measuring point of the water injection barrel 2 through a plastic hose, and opening a corresponding stop valve 5;
step three: then the water outlet valve 10 is closed; opening the water inlet 9, injecting water into the water injection barrel 2 and discharging air;
step four: then, the water level in the water injection bucket 2 is enabled to be at a zero position by adjusting the water outlet valve 10 and the water inlet 9;
step five: observing the number indicated by the standard meter 11, and judging whether the number is 4 milliamperes or not, if not, adjusting a zero setting knob of the differential pressure transmitter 1 until the real number of the standard meter 12 is 4 milliamperes;
step six: the liquid level of the water injection bucket 2 is at a full range level by adjusting the water outlet valve 10 and the water inlet 9;
step seven: observing the number of the standard meter 11, and judging whether the number is 20 milliamperes or not, if not, adjusting a measuring range knob of the differential pressure transmitter 1 until the real number of the standard meter 11 is 20 milliamperes;
step eight: repeating the third step to the sixth step until the error is within an allowable range;
step nine: the liquid level of the water injection barrel 2 is respectively in the positions of 0%, 25%, 50%, 75% and 100% of the measuring range by adjusting the water outlet valve 10 and the water inlet 9, and then the forward stroke and the reverse stroke check of the differential pressure transmitter 1 are completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932520.9A CN112581845A (en) | 2019-09-29 | 2019-09-29 | A differential pressure transmitter calibration equipment for teaching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910932520.9A CN112581845A (en) | 2019-09-29 | 2019-09-29 | A differential pressure transmitter calibration equipment for teaching |
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| CN112581845A true CN112581845A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910932520.9A Pending CN112581845A (en) | 2019-09-29 | 2019-09-29 | A differential pressure transmitter calibration equipment for teaching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235274A (en) * | 2021-12-14 | 2022-03-25 | 泰安佳业环保科技有限公司 | Pressure and differential pressure checking system and method |
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2019
- 2019-09-29 CN CN201910932520.9A patent/CN112581845A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235274A (en) * | 2021-12-14 | 2022-03-25 | 泰安佳业环保科技有限公司 | Pressure and differential pressure checking system and method |
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