CN205619979U - Partial -voltage type gas flow measuring device - Google Patents
Partial -voltage type gas flow measuring device Download PDFInfo
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- CN205619979U CN205619979U CN201620300743.5U CN201620300743U CN205619979U CN 205619979 U CN205619979 U CN 205619979U CN 201620300743 U CN201620300743 U CN 201620300743U CN 205619979 U CN205619979 U CN 205619979U
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- partial pressure
- pipe
- pressurize
- gas introduction
- valve
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- 238000005259 measurement Methods 0.000 claims abstract description 36
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 1
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 1
- 241001330002 Bambuseae Species 0.000 abstract 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 1
- 239000011425 bamboo Substances 0.000 abstract 1
- 230000008676 import Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a partial -voltage type gas flow measuring device, including gas introduction pipe, gaseous sectional pressure pipe and measuring device, install leading -in valve on the gas introduction pipe, gaseous sectional pressure pipe's quantity has more than one, and it is continuous with the gas introduction pipe all to pass through the partial pressure valve, measuring device connects respectively in gas introduction pipe and gaseous sectional pressure pipe's pipe wall, including constant temperature measurement portion and pressurize portion, constant temperature measurement portion is including surveying buret, measuring transducer, reference sensor and the poor circuit of constant temperature, pressurize portion includes a pressurize section of thick bamboo, slide bar and pneumatic cylinder. The utility model discloses handle, handle the error that causes zero point of having discharged to the measurement, guarantee measurement accuracy through the constant temperature pressurize needing measuring gas to carry out the partial pressure, measure measured data's reliability after the affirmation partial pressure respectively around the partial pressure, and it is convenient that simple structure uses.
Description
Technical field
This utility model belongs to measurement apparatus field, is specifically related to a kind of partial pressure type gas flow surveying instrument.
Background technology
The principle of the most general gas flowmeter is to arrange thermal source outside the tube wall of gas runner pipe, utilize the heat transfer relation of the flowing of gas, measure the heat taken away by gas molecule on thermal source, thus obtain gas molecule quality that correspondence flows through thus gas flow in the unit of account time.But during reality is measured, the temperature of gas and pressure all can produce impact to the heat transfer coefficient of gas, offseting so that measuring zero point, reducing certainty of measurement further；Especially when the gas for big flow measures, certainty of measurement is more inaccurate.
Therefore, developing a kind of measurement apparatus higher for the measurement of big flow gas and certainty of measurement is those skilled in the art institute urgent need to solve the problem.
Summary of the invention
For solving the problems referred to above, the utility model discloses a kind of partial pressure type gas flow surveying instrument.
In order to achieve the above object, the following technical scheme of this utility model offer:
A kind of partial pressure type gas flow surveying instrument, including gas introduction tube, partial pressure pipe and measurement apparatus；Importing valve is installed on gas introduction tube；The quantity of partial pressure pipe has a more than one, and all passes through partial pressure valve and be connected with gas introduction tube；Measurement apparatus is connected to gas introduction tube and the tube wall of partial pressure pipe, including constant temperature measurement portion and pressurize portion；Constant temperature measurement portion includes measuring pipe, measuring sensor, reference sensor and constant difference circuit；Measure pipe and be inserted perpendicularly into gas introduction tube and the tube wall of partial pressure pipe；Measure sensor and be fixed on the bottom measuring pipe；Reference sensor is arranged in the cavity measuring pipe；Constant difference circuit connects measurement sensor and reference sensor respectively by analog switch；Pressurize portion includes pressurize cylinder, slide bar and hydraulic cylinder；One end of pressurize cylinder is provided with pressurize chamber axially inward, and fixes with hydraulic cylinder；Sliding bar is in pressurize intracavity, and its tail end fixes with hydraulic cylinder；The bottom in pressurize chamber is connected by the tube wall of pressure maintaining pipe with gas introduction tube and partial pressure pipe.
This utility model provides a kind of partial pressure type gas flow surveying instrument, is made up of gas introduction tube, partial pressure pipe and measurement apparatus.Importing valve is wherein installed on gas introduction tube, controls the break-make of gas introduction tube, be simultaneously provided with more than one partial pressure pipe and connect gas introduction tube by partial pressure valve respectively, control the break-make of the gas introduction tube being attached thereto respectively.
Measurement apparatus in this utility model includes constant temperature measurement portion and pressurize portion, it is all connected to gas introduction tube and the tube wall of partial pressure pipe, it is respectively used to constant temperature measurement and gas introduction tube and partial pressure pipe are carried out pressurize, preventing temperature and air pressure from measurement data is produced deviation.Wherein constant temperature measurement portion is used for carrying out constant temperature measurement, is formed by measuring pipe, measurement sensor, reference sensor and constant difference circuit；Wherein measure sensor and be fixed on the bottom measuring pipe, be inserted perpendicularly into gas introduction tube and the tube wall of partial pressure pipe along with measuring pipe, be used for measuring real gas flow, and reference sensor is located in the cavity measuring pipe, is used for measuring zero point value as reference value；This utility model is additionally provided with constant difference circuit simultaneously, measurement sensor and reference sensor is connected respectively by analog switch, eliminate the impact heat transfer coefficient of gas caused due to the change of gas temperature to greatest extent, cause measuring zero point and offset, cause the reduction of certainty of measurement.
This utility model is additionally provided with the pressurize portion being made up of pressurize cylinder, slide bar and hydraulic cylinder, wherein one end of pressurize cylinder is provided with pressurize chamber axially inward, this end also fixes with hydraulic cylinder, sliding bar is in pressurize intracavity, tail end fixes with hydraulic cylinder, driving it to slide at pressurize intracavity by hydraulic cylinder, the bottom in pressurize chamber is connected by the tube wall of pressure maintaining pipe with gas introduction tube and partial pressure pipe；This structure carries out pressurize by the slip of slide bar；When the gas pressure in gas introduction tube and partial pressure pipe reduces, hydraulic cylinder band moving slide-bar slides to pressure maintaining pipe, is pushed by the gas of pressurize intracavity in gas introduction tube and partial pressure pipe, to increase wherein gas pressure；Otherwise, when the gas pressure in gas introduction tube and partial pressure pipe increases, hydraulic cylinder band moving slide-bar slides to the one end away from pressure maintaining pipe, increase the volume in pressurize chamber, enable the portion gas in gas introduction tube and partial pressure pipe to enter pressurize chamber temporarily to store, treat that the gas gas pressure in circulation, gas introduction tube and partial pressure pipe that closes to an end reduces the time suddenly, then the gas being stored therein in by slide bar is released；This structure ensure that the constant of the gas pressure of gas introduction tube and partial pressure pipe, and reduction changes the impact on gas heat transfer coefficient due to gas pressure, thus surface measurement zero point offsets, and causes the reduction of certainty of measurement.
And this utility model is designed with measurement apparatus at gas introduction tube and partial pressure pipe, it is possible to measure the gas flow before and after dividing potential drop respectively, it is ensured that operator understand that reliability and the accuracy of gas flow measurement after dividing potential drop.
As preferably, the quantity of partial pressure pipe is 2；Import valve and partial pressure valve is complete opening type valve.
As preferably, the quantity of partial pressure pipe is 3-4；Importing valve and two of which partial pressure valve is complete opening type valve, remaining partial pressure valve selects micro-open type valve.
Partial pressure pipe in this utility model may be selected to be 2-4；When partial pressure pipe is chosen as 2, after gas from gas ingress pipe enters, complete opening type valve fully opens, and carries out dividing potential drop by two partial pressure pipes；When partial pressure pipe is chosen as 3-4, complete opening type valve fully opens, and first passes through two of which and carries out dividing potential drop equipped with the partial pressure pipe of complete opening type valve, remains the partial pressure pipe equipped with micro-open type valve and carries out dividing potential drop according to the size of gas pressure；When gas pressure is less, two partial pressure pipes equipped with complete opening type valve directly carry out dividing potential drop；When gas pressure is bigger, then carried out assisting dividing potential drop by the partial pressure pipe equipped with micro-open type valve.
As preferably, measure sensor and all include temperature element and heating element heater with reference sensor；Temperature element is perpendicular to the flow direction of gas in gas introduction tube and partial pressure pipe；Heating element heater uniformly fits in temperature element.
Measurement sensor and reference sensor in this utility model are formed by temperature element and heating element heater, the flow direction of gas during wherein temperature element is perpendicular to gas introduction tube and partial pressure pipe, so that gas is measured the most accurately, heating element heater uniformly fits in temperature element simultaneously, control the gas temperature contacted with temperature element is balanced by constant difference circuit, it is ensured that the precision of measurement.
This utility model compared with prior art, is carried out voltage division processing to needing the gas measured, is processed error, the guarantee certainty of measurement discharged zero point and caused measurement by constant temperature pressurize；Measure respectively before and after dividing potential drop, the reliability of measurement data after confirmation dividing potential drop；And simple in construction is easy to use.
Accompanying drawing explanation
Fig. 1, structural representation of the present utility model；
The structural representation of measurement apparatus in Fig. 2, this utility model；
Fig. 3, this utility model are measured the structural representation of sensor and reference sensor；
In Fig. 4, this utility model, the quantity of partial pressure pipe is structural representation when 4.
Reference numerals list: gas introduction tube 1, partial pressure pipe 2, importing valve 3, partial pressure valve 4, constant temperature measurement portion 5, pressurize portion 6, measurement pipe 7, measurement sensor 8, reference sensor 9, constant difference circuit 10, pressurize cylinder 11, slide bar 12, hydraulic cylinder 13, pressurize chamber 14, pressure maintaining pipe 15, temperature element 16, heating element heater 17.
Detailed description of the invention
The technical scheme provided this utility model below with reference to specific embodiment is described in detail, it should be understood that following detailed description of the invention is merely to illustrate this utility model rather than limits scope of the present utility model.
Being illustrated in figure 1 structural representation of the present utility model, this utility model is a kind of partial pressure type gas flow surveying instrument, including gas introduction tube 1, partial pressure pipe 2 and measurement apparatus.
Importing valve 3 is installed on gas introduction tube 1；The quantity of partial pressure pipe 2 is 2, all passes through partial pressure valve 4 and is connected with gas introduction tube 1；Import valve 3 and partial pressure valve 4 is complete opening type valve.
Measurement apparatus is connected to gas introduction tube 1 and the tube wall of partial pressure pipe 2, including constant temperature measurement portion 5 and pressurize portion 6.
Such as Fig. 2, constant temperature measurement portion 5 includes measuring pipe 7, measuring sensor 8, reference sensor 9 and constant difference circuit 10；Measure pipe 7 and be inserted perpendicularly into gas introduction tube 1 and the tube wall of partial pressure pipe 2；Measure sensor 8 and be fixed on the bottom measuring pipe 7；Reference sensor 9 is arranged in the cavity measuring pipe 7；Constant difference circuit 10 connects measurement sensor 8 and reference sensor 9 respectively by analog switch；Such as Fig. 3, measure sensor 8 and all include temperature element 16 and heating element heater 17 with reference sensor 9；Temperature element 16 is perpendicular to the flow direction of gas in gas introduction tube 1 and partial pressure pipe 2；Heating element heater 17 uniformly fits in temperature element 16.
Pressurize portion 6 includes pressurize cylinder 11, slide bar 12 and hydraulic cylinder 13；One end of pressurize cylinder 11 is provided with pressurize chamber 14 axially inward, and fixes with hydraulic cylinder 13；Slide bar 12 slides in pressurize chamber 14, and its tail end fixes with hydraulic cylinder 13；The bottom in pressurize chamber 14 is connected by the tube wall of pressure maintaining pipe 15 with gas introduction tube 1 and partial pressure pipe 2.
Such as Fig. 4, the quantity of the partial pressure pipe 2 in this utility model can also be chosen as 4；Importing valve 3 and two of which partial pressure valve 4 is complete opening type valve, remaining partial pressure valve 4 selects micro-open type valve.
Finally it should be noted that, above example is only in order to illustrate the technical solution of the utility model and non-limiting technical scheme, it will be understood by those within the art that, the technical solution of the utility model is modified or equivalent by those, without deviating from objective and the scope of the technical program, all should contain in the middle of right of the present utility model.
Claims (4)
1. a partial pressure type gas flow surveying instrument, it is characterised in that: include gas introduction tube (1), partial pressure pipe (2) and measurement apparatus；Importing valve (3) is installed on described gas introduction tube (1)；The quantity of described partial pressure pipe (2) has a more than one, and all passes through partial pressure valve (4) and be connected with gas introduction tube (1)；Described measurement apparatus is connected to gas introduction tube (1) and the tube wall of partial pressure pipe (2), including constant temperature measurement portion (5) and pressurize portion (6)；Described constant temperature measurement portion (5) includes measuring pipe (7), measuring sensor (8), reference sensor (9) and constant difference circuit (10)；Described pipe (7) of measuring is inserted perpendicularly into gas introduction tube (1) and the tube wall of partial pressure pipe (2)；Described measurement sensor (8) is fixed on the bottom measuring pipe (7)；Described reference sensor (9) is arranged in the cavity measuring pipe (7)；Described constant difference circuit (10) connects measurement sensor (8) and reference sensor (9) respectively by analog switch；Described pressurize portion (6) includes pressurize cylinder (11), slide bar (12) and hydraulic cylinder (13)；One end of described pressurize cylinder (11) is provided with pressurize chamber (14) axially inward, and fixes with hydraulic cylinder (13)；Described slide bar (12) slides in pressurize chamber (14), and its tail end fixes with hydraulic cylinder (13)；The bottom of described pressurize chamber (14) is connected by the tube wall of pressure maintaining pipe (15) with gas introduction tube (1) and partial pressure pipe (2).
A kind of partial pressure type gas flow surveying instrument the most according to claim 1, it is characterised in that: the quantity of described partial pressure pipe (2) is 2；Described importing valve (3) and partial pressure valve (4) are complete opening type valve.
A kind of partial pressure type gas flow surveying instrument the most according to claim 1, it is characterised in that: the quantity of described partial pressure pipe (2) is 3-4；Described importing valve (3) and two of which partial pressure valve (4) are complete opening type valve, and remaining partial pressure valve (4) selects micro-open type valve.
A kind of partial pressure type gas flow surveying instrument the most according to claim 1, it is characterised in that: described measurement sensor (8) and reference sensor (9) all include temperature element (16) and heating element heater (17)；Described temperature element (16) is perpendicular to the flow direction of gas in gas introduction tube (1) and partial pressure pipe (2)；Described heating element heater (17) uniformly fits in temperature element (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620300743.5U CN205619979U (en) | 2016-04-12 | 2016-04-12 | Partial -voltage type gas flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620300743.5U CN205619979U (en) | 2016-04-12 | 2016-04-12 | Partial -voltage type gas flow measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205619979U true CN205619979U (en) | 2016-10-05 |
Family
ID=57029328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620300743.5U Active CN205619979U (en) | 2016-04-12 | 2016-04-12 | Partial -voltage type gas flow measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205619979U (en) |
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2016
- 2016-04-12 CN CN201620300743.5U patent/CN205619979U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210031 Pudong Road, Pukou District, Jiangsu, No. 10, No. Patentee after: National Electric Environmental Protection Research Institute Co., Ltd. Address before: 210031 Pudong Road, Pukou District, Jiangsu, No. 10, No. Patentee before: State Power Environmental Protection Research Institute |
|
| CP01 | Change in the name or title of a patent holder |