CN109724659B - Gas flow testing system and testing method for kitchen range - Google Patents
Gas flow testing system and testing method for kitchen range Download PDFInfo
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- CN109724659B CN109724659B CN201711049701.4A CN201711049701A CN109724659B CN 109724659 B CN109724659 B CN 109724659B CN 201711049701 A CN201711049701 A CN 201711049701A CN 109724659 B CN109724659 B CN 109724659B
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Abstract
The invention relates to a kitchen range gas flow testing system, which comprises a total pressure regulating valve, a total flowmeter, a pressure gauge and a plug valve which are arranged on a gas trunk, wherein at least two gas branches are connected in parallel, each gas branch is respectively connected with a nozzle, a pipeline switching valve and a differential pressure gauge are sequentially arranged on each gas branch along the gas flow direction, an empty-load pipeline and a flow testing pipeline are connected in parallel between the pipeline switching valve and the differential pressure gauge, and the pressure regulating valve and the shunt flow are respectively arranged on a flow measuring test tube; and also relates to a test method using the system. The invention can measure the gas flow on each gas branch, thereby clearly knowing the gas distribution condition of each branch, in addition, the invention can solve the problems that the measuring range and the accuracy of the flowmeter in the prior art meet the requirements but the flowmeter cannot be used because the pressure drop is too large, and simultaneously overcomes the along-the-way pressure loss on the pipeline, and ensures the accuracy of the test result.
Description
Technical Field
The invention relates to the field of gas stoves, in particular to a stove gas flow testing system and a testing method.
Background
At present, a valve body (plug valve) used on a kitchen range mainly comprises two channels and three channels, and in general experiments and research and development tests, the measured flow is the total flow flowing through the valve body, and the gas flow flowing out of each channel of the valve body cannot be accurately measured, so that the experiment and research and development processes of the valve body and even the gas kitchen range are hindered.
Although there are many types of flow meters in the market, such as piston type, turbine type, heat sensitive type, mass type, etc., these flow meters cannot well meet the requirements of measuring range and accuracy at the same time for the case where the measured pressure and flow rate are small, i.e. the accuracy is too low in the case where the measuring range can be met, or the range is too small in the case where the accuracy can be met. In addition, besides the measuring range and the accuracy, the pressure drop of the flowmeter can influence the flow test of the pipeline, the pressure drops of different types of flowmeters are different, and the overlarge pressure drop can directly lead to inaccurate measured flow.
Disclosure of Invention
The invention aims to provide a stove gas flow testing system capable of measuring flow of each branch of a stove valve body.
The second technical problem to be solved by the invention is to provide a stove gas flow testing system with accurate measurement results aiming at the prior art.
The third technical problem to be solved by the invention is to provide a kitchen range flow testing method capable of measuring the flow of each branch of a kitchen range valve body and accurate in measurement result.
The technical scheme adopted by the invention for solving the first and second technical problems is as follows: the utility model provides a cooking utensils gas flow test system, includes total air-vent valve, total flowmeter, manometer and the plug valve of setting on the gas trunk, has parallelly connected two piece at least gas branch road on this plug valve, and each gas branch road is connected with a nozzle respectively, its characterized in that has set gradually pipeline switching valve and differential pressure gauge along the air current direction on each gas branch road, has no-load pipeline and flow test pipeline in parallel between this pipeline switching valve and the differential pressure gauge, is provided with branch air-vent valve and branch flowmeter on this flow measurement test tube road respectively.
Preferably, the measuring range of each shunt meter is matched with the flow of the gas branch where the shunt meter is positioned, so that the influence of the pressure drop of the shunt meter on the flow test result can be reduced to a certain extent.
Preferably, the number of the branch flow meters on each gas branch circuit is at least one, each branch flow meter is respectively connected in parallel on the corresponding flow measurement test tube circuit, the number of the branch flow meters is in direct proportion to the gas flow of the gas branch circuit where the branch flow meters are located, the gas on each gas branch circuit only passes through one of the branch flow meters on the flow measurement test tube circuit, and the measuring range of the branch flow meter is matched with the gas flow of the gas branch circuit where the branch flow meters are located. Therefore, the gas flow on each gas branch can be distributed and the flow dividing meter on each gas branch can be selected, so that the measurement accuracy is ensured on the premise of ensuring the range of measurement.
Further, preferably, the measuring ranges of the branch flow meters on the gas branch circuits are different, so that the distribution of the gas flow of each gas branch circuit can be more reasonably and variously distributed according to actual needs, and the influence of the pressure drop of the branch flow meters and the pressure drop of the pipeline on the test result is reduced to the greatest extent.
Preferably, when the number of the branch flow meters of the gas branch circuit is greater than or equal to two, a flow meter switching valve is arranged between each branch flow meter and the branch pressure regulating valve on the flow measuring test tube path of the gas branch circuit, and the flow meter switching valve is used for enabling the gas to pass through one branch flow meter with a corresponding measuring range according to the gas flow of the gas branch circuit where the flow meter switching valve is located. So that the proper flow dividing meter can be conveniently selected according to the gas flow of each gas branch.
Preferably, the plug valve is connected with three gas branches, which are a first gas branch, a second gas branch and a third gas branch, and the flow of each gas branch is as follows: the first gas branch is less than the second gas branch and less than the third gas branch; the first gas branch is provided with a first branch flow meter, the second gas branch is connected with a second branch flow meter and a third branch flow meter in parallel, the third gas branch is connected with a fourth branch flow meter, a fifth branch flow meter and a sixth branch flow meter in parallel, the gas on the second gas branch passes through the second branch flow meter or the third branch flow meter, and the gas on the third gas branch passes through one of the fourth branch flow meter, the fifth branch flow meter and the sixth branch flow meter; wherein, the range of the second sub-flow meter is smaller than that of the third sub-flow meter, and the range of the fourth sub-flow meter, the fifth sub-flow meter and the sixth sub-flow meter are as follows: the fourth sub-flow meter is less than the fifth sub-flow meter and less than the sixth sub-flow meter.
The invention solves the third technical problem by adopting the technical scheme that: the testing method of the stove gas flow testing system is characterized by comprising the following steps of:
(1) The gas pressure of the gas main road is regulated through the total pressure regulating valve, so that the rated pressure of the gas is displayed on the pressure gauge, and the total flow measured by the total flow meter is the total flow of the gas main road;
(2) Switching each gas branch to an idle pipeline through a pipeline switching valve, and respectively measuring the pressure of each branch at the moment;
(3) Switching each gas branch to the corresponding branch flow meter through the flow meter switching valve, and adjusting the total pressure regulating valve and each branch pressure regulating valve to ensure that the pressure displayed on each differential pressure meter at the moment is respectively equal to the corresponding pressure value of the step (2), wherein the flow displayed on each branch flow meter on each gas branch is the flow on each gas branch
Compared with the prior art, the invention has the advantages that: according to the invention, the gas flow on each gas branch is measured by arranging the branch flow meter on each gas branch, so that the gas distribution condition of each branch is clearly known, a data acquisition method can be provided for the distribution condition of the existing kitchen range valve body and each ring flow, and an effective test method can be provided for developing a novel kitchen range valve body, adjusting the gas flow distribution of each branch and checking a new valve body in the future. The testing method of the invention can realize the same flow through the nozzle before and after using the idle pipeline as long as the pressure value displayed by the differential pressure meter of each gas branch is ensured, thereby solving the problems that the measuring range and the accuracy of the flowmeter in the prior art meet the requirements but the flowmeter cannot be used because the pressure drop is too large, simultaneously overcoming the along-path pressure loss on the pipeline and ensuring the accuracy of the testing result. In addition, the invention can judge whether the gas pipeline has leakage problem by comparing the total flow with the flow sum of each gas branch, thereby finding out the problem in time and avoiding gas leakage accidents.
Drawings
FIG. 1 is a schematic diagram of a burner gas flow test system according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, a gas flow testing system of a kitchen range comprises a total pressure regulating valve 2, a total flow meter 3, a pressure meter 4 and a plug valve 5 which are arranged on a gas trunk line 1, wherein three gas branches are connected in parallel on the plug valve 5, and each gas branch is connected with a nozzle 101.
Further, a line switching valve 61 and a differential pressure gauge 9 are sequentially provided on each of the above-mentioned gas branch lines in the gas flow direction, and an empty line 10 and a flow rate test line are connected in parallel between the line switching valve 61 and the differential pressure gauge 9, and a pressure regulating valve 7 and a flow dividing meter are provided on the flow rate test line. Therefore, the test system not only measures the total flow of the gas main road 1 through the total flow meter 3, but also measures the gas flow on each gas branch road through the branch flow meter in each gas branch road, so that the gas distribution condition of each branch road is clearly known, a data acquisition method can be provided for the distribution condition of the existing kitchen range valve body and each ring flow, and an effective test method can be provided for developing a novel kitchen range valve body, adjusting the gas flow distribution of each branch road and checking the novel valve body in the future.
Still further, the measuring range of each flow dividing meter is matched with the flow of the gas branch where the flow dividing meter is positioned, so that the influence of the pressure drop of the flow dividing meter on the flow test result can be reduced to a certain extent. Preferably, the number of the branch flow meters on each gas branch circuit is at least one, each branch flow meter is respectively connected in parallel on the corresponding flow measurement test tube circuit, the number of the branch flow meters is in direct proportion to the gas flow of the gas branch circuit where the branch flow meters are located, the gas on each gas branch circuit only passes through one of the branch flow meters on the flow measurement test tube circuit, the measuring range of the branch flow meter is matched with the gas flow of the gas branch circuit where the branch flow meter is located, and the measuring ranges of the branch flow meters on each gas branch circuit are different. Therefore, the gas flow on each gas branch can be distributed and the flow dividing meter on each gas branch can be selected no matter the gas flow on the gas branch, and the measurement accuracy can be ensured on the premise of ensuring the range of measurement.
Preferably, when the number of the branch flow meters of the gas branch is greater than or equal to two, a flow meter switching valve 62 is disposed between each branch flow meter and the branch pressure regulating valve 7 on the flow measurement test tube of the gas branch, and the flow meter switching valve 62 is used for making the gas pass through one branch flow meter of the corresponding measuring range according to the gas flow of the gas branch where the flow meter switching valve 62 is located.
Specifically, three gas branches, namely a first gas branch 11, a second gas branch 12 and a third gas branch 13, are connected to the plug valve 5 in this embodiment, and the flow of each gas branch is as follows: the first gas branch 11 < the second gas branch 12 < the third gas branch 13. A first sub-flow meter 81 is disposed on the flow test pipeline 111 of the first gas branch 11, a second sub-flow meter 82 and a third sub-flow meter 83 are connected in parallel to the flow test pipeline 121 of the second gas branch 12, a fourth sub-flow meter 84, a fifth sub-flow meter 85 and a sixth sub-flow meter 86 are connected in parallel to the flow test pipeline 131 of the third gas branch 13, the gas on the second gas branch 12 passes through the second sub-flow meter 82 or the third sub-flow meter 83, and the gas on the third gas branch 13 passes through one of the fourth sub-flow meter 84, the fifth sub-flow meter 85 and the sixth sub-flow meter 86; the measurement range of the second sub-flow meter 82 is smaller than that of the third sub-flow meter 83, and the measurement ranges of the fourth sub-flow meter 84, the fifth sub-flow meter 85 and the sixth sub-flow meter 86 are as follows: fourth sub-flow meter 84 < fifth sub-flow meter 85 < sixth sub-flow meter 86. And, one flow meter switching valve 62 is provided on each of the flow test lines 121,131 of the second gas branch line 12 and the third gas branch line 13.
The test method of the stove gas flow test system in the embodiment is as follows:
(1) The gas pressure of the gas main path 1 is regulated by the total pressure regulating valve 2, so that the rated pressure of the gas is displayed on the pressure gauge 4, and the total flow Q of the gas main path 1 is measured by the total flow meter 3.
(2) The gas branches 11,12,13 are all switched to the idle pipeline 10 by the pipeline switching valve 61, the branch pressures are respectively measured at the moment, the pressures displayed by the differential pressure gauges 9 on the first gas branch 11, the second gas branch 12 and the third gas branch 13 are respectively P1, P2 and P3, and the P1, P2 and P3 are respectively the front pressure of the nozzles 101 of the gas branches.
(3) Each gas branch is switched to the corresponding branch flow meter by the flow meter switching valve 62, and the total pressure regulating valve 2 and each branch pressure regulating valve 7 are regulated so that the pressures P1 ', P2' and P3 'displayed on each differential pressure meter 9 at this time are respectively equal to the corresponding pressure values of the step (2), namely, P1' =p1, P2 '=p2 and P3' =p3, and the flow rates Q1, Q2 and Q3 displayed on each branch flow meter on each gas branch are the flow rates on each gas branch.
From the above, the invention can realize the same flow through the nozzle 101 before and after using the idle pipeline 10 as long as the pressure value displayed by the differential pressure meter 9 of each gas branch is ensured, thereby solving the problems that the measuring range and the accuracy of the flowmeter in the prior art meet the requirements but the flowmeter cannot be used because the pressure drop is too large, simultaneously overcoming the along-path pressure loss on the pipeline and ensuring the accuracy of the test result. In addition, the invention can judge whether the gas pipeline has leakage problem by comparing whether the total flow Q is equal to the sum of the flow of each gas branch (namely, the sum of Q1, Q2 and Q3), thereby finding out the problem in time and avoiding gas leakage accidents.
Claims (5)
1. The gas flow testing system of the kitchen range comprises a total pressure regulating valve (2), a total flowmeter (3), a pressure gauge (4) and a plug valve (5) which are arranged on a gas trunk (1), wherein at least two gas branches are connected in parallel on the plug valve (5), each gas branch is respectively connected with a nozzle (101), the gas flow testing system is characterized in that a pipeline switching valve (61) and a differential pressure gauge (9) are respectively arranged on each gas branch in sequence along the gas flow direction, an idle pipeline (10) and a flow testing pipeline are connected in parallel between the pipeline switching valve (61) and the differential pressure gauge (9), a pressure dividing valve (7) and a shunt flow dividing valve are respectively arranged on the flow testing pipeline,
the number of the branch flow meters on each gas branch circuit is at least one, each branch flow meter is respectively connected in parallel on the corresponding flow measuring test circuit, the number of the branch flow meters is in direct proportion to the gas flow of the gas branch circuit where the branch flow meters are positioned, the gas on each gas branch circuit only passes through one of the branch flow meters on the flow measuring test circuit, the measuring range of the branch flow meter is matched with the gas flow of the gas branch circuit where the branch flow meters are positioned,
when the number of the branch flow meters of the gas branch is more than or equal to two, a flow meter switching valve (62) is arranged between each branch flow meter and the branch pressure regulating valve (7) on the flow measuring test tube path of the gas branch, and the flow meter switching valve (62) is used for enabling gas to pass through one branch flow meter of the corresponding measuring range according to the gas flow of the gas branch where the flow meter switching valve (62) is located.
2. The cooktop gas flow measurement system of claim 1, wherein the range of each split flow meter matches the flow of the gas branch in which it is located.
3. The cooktop gas flow measurement system of claim 1, wherein the range of each partial flow meter on each gas branch varies.
4. The gas flow testing system of the kitchen range according to any one of claims 1 to 3, wherein three gas branches are connected to the plug valve (5), and are a first gas branch (11), a second gas branch (12) and a third gas branch (13), and the flow of each gas branch is as follows: the first gas branch (11) < the second gas branch (12) < the third gas branch (13);
a first sub-flow meter (81) is arranged on the first gas branch (11), a second sub-flow meter (82) and a third sub-flow meter (83) are connected in parallel on the second gas branch (12), a fourth sub-flow meter (84), a fifth sub-flow meter (85) and a sixth sub-flow meter (86) are connected in parallel on the third gas branch (13), the gas on the second gas branch (12) passes through the second sub-flow meter (82) or the third sub-flow meter (83), and the gas on the third gas branch (13) passes through one of the fourth sub-flow meter (84), the fifth sub-flow meter (85) and the sixth sub-flow meter (86);
wherein, the measuring range of the second sub-flow meter (82) is smaller than the measuring range of the third sub-flow meter (83), the measuring ranges of the fourth sub-flow meter (84), the fifth sub-flow meter (85) and the sixth sub-flow meter (86) are as follows: the fourth partial flow meter (84) < the fifth partial flow meter (85) < the sixth partial flow meter (86).
5. A testing method applied with the stove gas flow testing system as claimed in any one of claims 1 to 3, characterized by comprising the steps of:
the method comprises the steps of (1) adjusting the gas pressure of a gas main path (1) through a total pressure regulating valve (2), wherein the rated pressure of the gas main path (1) is displayed on a pressure meter (4), and the total flow of the gas main path (1) is measured by a total flow meter (3);
(2) Switching each gas branch to an idle pipeline (10) through a pipeline switching valve (61), and respectively measuring the pressure of each branch at the moment;
(3) And (3) switching each gas branch to a corresponding branch flow meter through a flow meter switching valve (62), and adjusting the total pressure regulating valve (2) and each branch pressure regulating valve (7) to ensure that the pressure displayed on each differential pressure meter (9) at the moment is respectively equal to the corresponding pressure value of the step (2), wherein the flow displayed on each branch flow meter on each gas branch is the flow on each gas branch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049701.4A CN109724659B (en) | 2017-10-31 | 2017-10-31 | Gas flow testing system and testing method for kitchen range |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711049701.4A CN109724659B (en) | 2017-10-31 | 2017-10-31 | Gas flow testing system and testing method for kitchen range |
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| CN109724659A CN109724659A (en) | 2019-05-07 |
| CN109724659B true CN109724659B (en) | 2024-01-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111271605A (en) * | 2020-04-03 | 2020-06-12 | 上海熊猫机械(集团)有限公司 | Pipe network leakage detection system |
| CN112096695B (en) * | 2020-09-30 | 2022-06-24 | 潍柴动力股份有限公司 | Flow monitoring system and flow monitoring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019634A (en) * | 1996-07-08 | 1998-01-23 | Tokyo Gas Co Ltd | Gas flow measuring device |
| JP2008286812A (en) * | 2008-09-05 | 2008-11-27 | Tadahiro Omi | Differential flow meter |
| WO2016059132A1 (en) * | 2014-10-14 | 2016-04-21 | NSB Niederelbe Schiffahrtsgesellschaft mbH & Co. KG | Bunker measuring system |
| CN105699062A (en) * | 2016-02-22 | 2016-06-22 | 合肥通用机械研究院 | Flow resistance test system of valve flow and method for performing little micro flow test by using the same |
| CN106872155A (en) * | 2017-01-20 | 2017-06-20 | 合肥通用机械研究院 | A kind of performance of exhaust valve test system and method for testing |
-
2017
- 2017-10-31 CN CN201711049701.4A patent/CN109724659B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019634A (en) * | 1996-07-08 | 1998-01-23 | Tokyo Gas Co Ltd | Gas flow measuring device |
| JP2008286812A (en) * | 2008-09-05 | 2008-11-27 | Tadahiro Omi | Differential flow meter |
| WO2016059132A1 (en) * | 2014-10-14 | 2016-04-21 | NSB Niederelbe Schiffahrtsgesellschaft mbH & Co. KG | Bunker measuring system |
| CN105699062A (en) * | 2016-02-22 | 2016-06-22 | 合肥通用机械研究院 | Flow resistance test system of valve flow and method for performing little micro flow test by using the same |
| CN106872155A (en) * | 2017-01-20 | 2017-06-20 | 合肥通用机械研究院 | A kind of performance of exhaust valve test system and method for testing |
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