CN210664696U - Negative pressure method gas meter flow fluctuation formula mechanical endurance test device - Google Patents
Negative pressure method gas meter flow fluctuation formula mechanical endurance test device Download PDFInfo
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- CN210664696U CN210664696U CN201922222703.XU CN201922222703U CN210664696U CN 210664696 U CN210664696 U CN 210664696U CN 201922222703 U CN201922222703 U CN 201922222703U CN 210664696 U CN210664696 U CN 210664696U
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Abstract
The utility model provides a negative pressure method gas meter flow fluctuation formula machinery endurance test device, including multiunit electromagnetic pneumatic valve, the entry manifold, front end manual valve, the gas table of being surveyed, rear end manual valve, export manifold and air exhaust fan, multiunit electromagnetic pneumatic valve parallel connection is in entry manifold one side, entry manifold opposite side has at least one front end manual valve through pipeline parallel connection, there is the rear end manual valve that disposes in pairs with front end manual valve through pipe connection in export manifold one side, the gas table of being surveyed passes through pipe connection between front end manual valve and rear end manual valve, export manifold one side is connected with air exhaust fan through the pipeline. The device adopts a negative pressure suction method, utilizes the fan as an air extraction source, the upstream end of the detected household gas meter is connected with the atmosphere, the air pressure is stable, the downstream end is connected with the air extraction fan to realize gas flow, and meanwhile, the adoption of equipment with higher price and relatively poorer reliability is avoided, so the investment, manufacture and use cost of the device is greatly reduced.
Description
Technical Field
The utility model relates to a measurement technical field, concretely relates to negative pressure method gas meter flow fluctuation formula mechanical endurance test device.
Background
Energy is the most important material basis for human survival and development, and is the life line of national economy. With the optimization and adjustment of energy structures in China, natural gas (including coal gas, liquefied petroleum gas and the like) is used as one of important primary energy sources, and the proportion of energy consumption in China is continuously increased. The correct and reasonable measurement of the natural gas flow is an important link for natural gas utilization, and relates to the benefits of all parties.
Among the end users of natural gas, the number of home users is absolutely dominant over the number of industrial and commercial users. The gas meter metering characteristics of the household gas meter user are that the total gas flow is small but the flow fluctuates frequently. Therefore, in the research and development test of the household gas meter, the durability test is one of the key subjects. Aiming at the characteristic that the household gas meter has obvious fragmentation use scene, in the national standard GB/T6968 plus 2019 diaphragm gas meter which is implemented in 2019, 12, month and 01, a diaphragm gas meter durability test requirement related to a flow fluctuation type cycle period method is added, and a durability test containing flow fluctuation is introduced, so that the durability and the reliability of the diaphragm gas meter under the full-life working condition are ensured.
At present, the institute has successfully developed "a flow fluctuation type cycle period test apparatus for durability test of a household gas meter" using a positive pressure blowing method and applied for a utility model patent (grant publication No. CN 209387107U). However, the inventor of the utility model finds, through research, that the existing test device can meet the pressure requirement of the air source in the national standard only by adopting a positive pressure blowing method and reducing the pressure of the air source generated by a fan or an air compressor through a high-precision pressure reducing valve, so that the equipment investment cost is higher; meanwhile, when a positive pressure blowing method is adopted, the effect is better when the air compressor is used as an air source, but the durability of the air compressor after long-time use needs to be further examined, so that the use cost is higher.
Therefore, it is necessary to further develop a testing device which has low equipment investment cost, low use cost, reliable operation and technical index meeting the requirement of 'gas meter durability test of flow fluctuation type cycle method' in the national standard of GB/T6968-.
SUMMERY OF THE UTILITY MODEL
To current flow fluctuation formula cycle period test device that is used for domestic gas table endurance test, owing to adopt the malleation method of blowing, the air supply that produces by fan or air compressor must pass through the decompression valve decompression of high accuracy, therefore equipment input cost is higher, and the durability of air compressor after long-time the use needs further testings simultaneously, therefore the higher technical problem of use cost, the utility model provides a negative pressure method gas table flow fluctuation formula machinery endurance test device.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a undulant mechanical endurance test device of negative pressure method gas meter flow, includes multiunit electromagnetic pneumatic valve, entry header, front end manual valve, surveyed gas table, rear end manual valve, export header and air exhaust fan, multiunit electromagnetic pneumatic valve parallel connection is in one side of entry header, the opposite side of entry header has at least one front end manual valve through pipeline parallel connection, there is the rear end manual valve that disposes in pairs with the front end manual valve one side of export header through the pipe connection, surveyed gas table passes through between front end manual valve and the rear end manual valve through the pipe connection, front end manual valve and rear end manual valve are used for the manual regulation to flow through the maximum flow of being surveyed the membrane type gas table in order to control pressure and the flow of being surveyed gas table inlet end, one side of export header is passed through the pipeline and is connected with air exhaust fan.
Compared with the prior art, the utility model provides a negative pressure method gas meter flow fluctuation type mechanical endurance test device, the flow fluctuation realization and switching method of the device is the same as the existing flow fluctuation type cycle period test device for the durability test of the household gas meter by adopting a positive pressure blowing method, the technical index adopts a negative pressure suction method on the premise of meeting the test requirement of the gas meter durability test of the flow fluctuation type cycle period method in the national standard of GB/T6968 plus 2019 film gas meter, a small fan is used as an air suction source, the upstream end of the household gas meter to be detected is connected with the atmosphere through an electromagnetic pneumatic valve, the atmospheric pressure is stable, the downstream end is connected with the air suction fan to realize the gas flow, meanwhile, the adoption of high-price and relatively poor-reliability equipment such as a high-precision pressure reducing valve and an air compressor is avoided, so that the investment, manufacturing and use cost of the device is greatly reduced.
Furthermore, the number of the electromagnetic pneumatic valve groups is three.
Furthermore, the other side of the inlet manifold is connected with three front-end manual valves in parallel through pipelines, and each front-end manual valve is connected with a rear-end manual valve through a measured gas meter.
Furthermore, a pressure stabilizing tank is connected to the pipeline between the air exhaust fan and one side of the outlet header.
Drawings
Fig. 1 is the schematic structural diagram of the principle of the negative pressure gas meter flow fluctuation type mechanical endurance test device provided by the utility model.
In the figure, 1, an electromagnetic pneumatic valve; 2. an inlet manifold; 3. a front end manual valve; 4. a gas meter to be measured; 5. a rear end manual valve; 6. an outlet manifold; 7. an air exhaust fan; 8. and (7) a pressure stabilizing tank.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the utility model provides a negative pressure method gas meter flow fluctuation type mechanical endurance test device, which comprises a plurality of groups of electromagnetic pneumatic valves 1, an inlet manifold 2, a front end manual valve 3, a tested gas meter 4, a rear end manual valve 5, an outlet manifold 6 and an air exhaust fan 7, wherein the plurality of groups of electromagnetic pneumatic valves 1 are connected in parallel to one side of the inlet manifold 2, specifically, the electromagnetic pneumatic valves 1 are valve combination modes adopting 'electromagnetic valve controlled pneumatic valves', the flow control valve is formed by utilizing the characteristics of reliable operation and no heat generation of the pneumatic valves and by utilizing the opening and closing combination of the electromagnetic valve controlled pneumatic valves, the pneumatic valves driven by the electromagnetic valve carry out the rapid opening and closing of the pneumatic valves, the rapid change of the flow of the tested membrane type gas meter is realized, the purpose of flow fluctuation type cyclic endurance test is achieved, and the reliable and safe and stable operation of the device is ensured, the opposite side of entry manifold 2 has at least one front end manual valve 3 through pipeline parallel connection, one side of export manifold 6 has rear end manual valve 5 of disposing in pairs with front end manual valve 3 through the tube coupling, surveyed gas table 4 passes through the tube coupling between front end manual valve 3 and rear end manual valve 5, front end manual valve 3 and rear end manual valve 5 are used for the manual maximum flow who adjusts the membrane gas table of flow through by the control to be surveyed the pressure and the flow of gas table 4 inlet end, one side of export manifold 6 is passed through the pipeline and is connected with air exhaust fan 7, air exhaust fan 7 specifically can adopt a small-size fan to realize, and this fan needs to satisfy the gas flow requirement of being surveyed the gas table, and takes the flow outlet to avoid the fan to hold back.
Compared with the prior art, the utility model provides a negative pressure method gas meter flow fluctuation type mechanical endurance test device, the flow fluctuation realization and switching method of the device is the same as the existing flow fluctuation type cycle period test device for the durability test of the household gas meter by adopting a positive pressure blowing method, the technical index adopts a negative pressure suction method on the premise of meeting the test requirement of the gas meter durability test of the flow fluctuation type cycle period method in the national standard of GB/T6968 plus 2019 film gas meter, a small fan is used as an air suction source, the upstream end of the household gas meter to be detected is connected with the atmosphere through an electromagnetic pneumatic valve, the atmospheric pressure is stable, the downstream end is connected with the air suction fan to realize the gas flow, meanwhile, the adoption of high-price and relatively poor-reliability equipment such as a high-precision pressure reducing valve and an air compressor is avoided, so that the investment, manufacturing and use cost of the device is greatly reduced.
As a specific example, please refer to fig. 1, the number of the groups of the electromagnetic pneumatic valves 1 is three, that is, three electromagnetic pneumatic valves 1 are electrically connected in parallel to one side of the inlet manifold 2, if a plurality of groups of electromagnetic pneumatic valves are provided in the present application, the flow fluctuation pattern is the same as the flow fluctuation type mechanical durability test system for the household gas meter, and the flow fluctuation process is illustrated by using the test device of three electromagnetic pneumatic valves included in the head of fig. 1 as an example: when the three electromagnetic pneumatic valves are opened simultaneously, the gas flow is the maximum rated working flow of the measured gas meter; when only two electromagnetic pneumatic valves are opened, the gas flow is two thirds of the maximum rated working flow of the measured gas meter; when one and only one electromagnetic pneumatic valve is opened, the gas flow is one third of the maximum rated working flow of the measured gas meter; when the electromagnetic-free pneumatic valve is opened, the gas flow passing through the gas meter to be measured is zero. The fluctuation of the gas flow can be realized by setting the opening and closing state and the opening and closing duration of the head electromagnetic pneumatic valve gate; by setting the total test duration, the time for performing the flow fluctuation type mechanical durability test of the household gas meter can be set, and the technical requirement of the GB/T6968 plus 2019 diaphragm gas meter national standard on the durability test of the flow fluctuation type cycle periodic method gas meter is met.
As a specific embodiment, the other side of the inlet header 2 is connected in parallel with three front-end manual valves 3 through a pipeline, and each front-end manual valve 3 is connected with a rear-end manual valve 5 through a measured gas meter 4, that is, in this embodiment, three stations capable of performing a durability test on a diaphragm gas meter are provided, which can be extended to an infinite number by those skilled in the art.
As a specific embodiment, a pressure stabilizing tank 8 is further connected to a pipeline between the air exhaust fan 7 and one side of the outlet header 6, the pressure stabilizing tank 8 can ensure pressure stability, and if the pressure stabilizing tank 8 is arranged, an adjustable air exhaust opening and a water discharge device are required on the tank body.
In order to better understand the utility model provides a fluctuating mechanical endurance test device of negative pressure method gas meter flow, following will be to the concrete work flow of this whole set of device do brief explanation:
1) the front end of the household gas meter to be measured is connected with the atmosphere, and after the tail air extraction fan is started, stable airflow is formed, and the pressure of an upstream air source is stable;
2) all electromagnetic pneumatic valves are opened, manual valves in front of and behind a testing station of the tested household gas meter are adjusted in a combined mode, and the gas flow of the household gas meter on the testing station reaches the maximum rated working flow of the gas meter;
3) the gas flowing through the gas meter on the testing station flows through the tail air exhaust fan and is exhausted into the atmosphere;
4) all the electromagnetic pneumatic valves are opened, after the manual valves are adjusted to stabilize the flow, a flow fluctuation type mechanical durability test is started, and the switching sequence of the gas flow flowing through the measured gas meter is as follows: at 2/3 maximum flow point QmaxThe lower operation is carried out for 5 +/-1 s, and the operation is switched to 1/3 maximum flow point QmaxRunning for 3 +/-1 s, and switching to the maximum flow point QmaxThe operation is carried out for 5 +/-1 s, and finally the operation is carried out for 3 +/-1 s at a zero flow point, so that a cycle is completed, and the experiment time at any flow point can be adjusted.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (4)
1. A negative pressure method gas meter flow fluctuation type mechanical endurance test device is characterized by comprising a plurality of groups of electromagnetic pneumatic valves, an inlet manifold, a front end manual valve, a measured gas meter, a rear end manual valve, an outlet manifold and an air exhaust fan, wherein the plurality of groups of electromagnetic pneumatic valves are connected in parallel with one side of the inlet manifold, the other side of the inlet manifold is connected with at least one front-end manual valve in parallel through a pipeline, one side of the outlet manifold is connected with a rear-end manual valve which is matched with the front-end manual valve in pair through a pipeline, the measured gas meter is connected between the front end manual valve and the rear end manual valve through a pipeline, the front end manual valve and the rear end manual valve are used for manually adjusting the maximum flow passing through the measured diaphragm gas meter so as to control the pressure and the flow of the gas inlet end of the measured gas meter, and one side of the outlet manifold is connected with the air exhaust fan through a pipeline.
2. The negative-pressure gas meter flow fluctuation type mechanical durability test device according to claim 1, wherein the number of the electromagnetic pneumatic valve groups is three.
3. The negative pressure gas meter flow fluctuation type mechanical durability test device according to claim 1, wherein three front end manual valves are connected in parallel to the other side of the inlet manifold through a pipeline, and each front end manual valve is connected with a rear end manual valve through a measured gas meter.
4. The negative-pressure gas meter flow fluctuation type mechanical durability test device according to claim 1, wherein a pressure stabilizing tank is further connected to a pipeline between the air exhaust fan and one side of the outlet header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922222703.XU CN210664696U (en) | 2019-12-12 | 2019-12-12 | Negative pressure method gas meter flow fluctuation formula mechanical endurance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922222703.XU CN210664696U (en) | 2019-12-12 | 2019-12-12 | Negative pressure method gas meter flow fluctuation formula mechanical endurance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210664696U true CN210664696U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922222703.XU Expired - Fee Related CN210664696U (en) | 2019-12-12 | 2019-12-12 | Negative pressure method gas meter flow fluctuation formula mechanical endurance test device |
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| Country | Link |
|---|---|
| CN (1) | CN210664696U (en) |
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2019
- 2019-12-12 CN CN201922222703.XU patent/CN210664696U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20211212 |
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| CF01 | Termination of patent right due to non-payment of annual fee |