CN204128646U - A kind of normal flow generation device of gas meter, flow meter error of indication monitor station - Google Patents
A kind of normal flow generation device of gas meter, flow meter error of indication monitor station Download PDFInfo
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- CN204128646U CN204128646U CN201420626676.7U CN201420626676U CN204128646U CN 204128646 U CN204128646 U CN 204128646U CN 201420626676 U CN201420626676 U CN 201420626676U CN 204128646 U CN204128646 U CN 204128646U
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Abstract
The utility model discloses a kind of normal flow generation device of gas meter, flow meter error of indication monitor station, comprise proving flowmeter, stop valve, needle valve and vacuum generating device, it is characterized in that, described proving flowmeter is connected to the first collecting pipe, be connected by some paths between first collecting pipe with the second collecting pipe, and on every bar path, device has stop valve and needle valve, and the outlet of the second collecting pipe is connected to vacuum generating device.The normal flow generation device of gas meter, flow meter error of indication monitor station described in the utility model by adopt proving flowmeter and needle valve with the use of, thus the flow standard value on every bar path can be regulated, regulate fast simple and convenient, the dirigibility of whole normal flow generation device is strong, can reach standard value required arbitrarily by flexible flow.
Description
Technical field
The utility model relates to flow metering field, particularly relates to a kind of normal flow generation device of gas meter, flow meter error of indication monitor station.
Background technology
The normal flow generation device of gas meter, flow meter error of indication monitor station is the test unit for gas meter testing calibration, belongs to the upper level working stamndard of various gas meter.
The normal flow generation device of gas meter, flow meter error of indication monitor station conventional is at present bell-jar flow standard device and sonic nozzle method flow standard device.Bell-jar flow standard device can not provide long-continued source of the gas, the negligible amounts of disposable test table tool, is not easy to realize automatic control.The measuring principle of sonic nozzle method flow standard device is because nozzle is the runner that an aperture reduces gradually, the minimum part in aperture is called the throat of nozzle, and at the runner having below University of Science and Technology gradually, aperture of throat, if nozzle well mouth pressure is inconvenient, reduce top hole pressure, namely reducing the gas flow that pressure ratio then flows through nozzle will increase, when pressure ratio is little arrive critical pressure ratio time, gas flow reaches maximum, if reduce top hole pressure again and now flow will remain unchanged.
But the flow of current used sonic nozzle method flow standard device depends on the capacity of vacuum pump and the diameter of nozzle, the systematic comparison of equipment set is complicated, and sonic nozzle difficulty of processing is large, and can not regulate, equipment investment cost is high.
Utility model content
The technical assignment of technical problem to be solved in the utility model and proposition improves prior art, a kind of normal flow generation device of gas meter, flow meter error of indication monitor station is provided, the flow standard device difficulty of processing solved in current technology is large, can not regulate, the problem that cost is high.
For solving above technical matters, the technical solution of the utility model is:
A kind of normal flow generation device of gas meter, flow meter error of indication monitor station, comprise proving flowmeter, stop valve, needle valve and vacuum generating device, it is characterized in that, described proving flowmeter is connected to the first collecting pipe, be connected by path between first collecting pipe with the second collecting pipe, and device has stop valve and needle valve on path, the outlet of the second collecting pipe is connected to vacuum generating device.The utility model utilizes vacuum generating device to produce negative pressure, thus make gas produce flowing in the normal flow generation device of whole gas meter, flow meter error of indication monitor station, the break-make of stop valve control path, by regulating the uninterrupted in needle valve control path, make flow reach the calibration value of needs, easy to adjust quick, cost is low, the flow that proving flowmeter record passes through, whole apparatus structure is simple, and easy to adjust, fabrication design is simple.
Further, be connected with the path of two and more parallel between the first described collecting pipe and the second collecting pipe, on every bar path, all device has stop valve and needle valve.The normal flow generation device of gas meter, flow meter error of indication monitor station described in the utility model arranges some paths at the first collecting pipe and the second collecting pipe, thus can realize several flow by opening different paths.When regulating the flow of every bar path, first the stop valve of other paths is closed, only open separately the stop valve of a path, vacuum generating device produces negative pressure and gas is flow through in this path, by regulating the needle valve on this path and observing the flow number of proving flowmeter thus set the flux scale definite value of this path, the flow of all the other paths also regulates according to upper type, finally just can be undertaken combining and realizes several normal flow by opening different path.
Further, described proving flowmeter adopts wet flow indicator, the active volume of each air chamber of wet test meter is controlled by the liquid side injecting flowmeter in advance, accuracy is high, and under the fiducial probability of 0.95, its expanded uncertainty can reach 0.2% ~ 0.5%, use at a constant temperature, accuracy of reading, directly perceived, easy to use, long service life.
Further, described vacuum generating device adopts vacuum pump, vacuum generator or negative-pressure air fan, is natively having compressed-air actuated place, uses vacuum generator to obtain the simple and convenient cost of vacuum low, and there is no compressed-air actuated place, obtain vacuum with vacuum pump or negative-pressure air fan more convenient.
Compared with prior art, the utility model advantage is:
The normal flow generation device of gas meter, flow meter error of indication monitor station described in the utility model by adopt proving flowmeter and needle valve with the use of, thus the flow standard value on every bar path can be regulated, regulate fast simple and convenient, the dirigibility of whole normal flow generation device is strong, can reach standard value required arbitrarily by flexible flow, structure is simple, and processing and manufacturing difficulty is little, cost of manufacture is low, high financial profit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of normal flow generation device of gas meter, flow meter error of indication monitor station disclosed in the utility model embodiment, can reconcile arbitrarily, cost is low, easily makes, and flow can not change along with the numerical value change of tested table.
As shown in Figure 1, a kind of normal flow generation device of gas meter, flow meter error of indication monitor station, comprise proving flowmeter 1, stop valve 2, needle valve 3 and vacuum generating device 4, proving flowmeter 1 adopts wet flow indicator, vacuum generating device 4 adopts vacuum pump, vacuum generator or negative-pressure air fan, proving flowmeter 1 is connected to the first collecting pipe 5, be connected by some (at least two) paths between first collecting pipe 5 with the second collecting pipe 6, and device has the outlet of stop valve 2 and needle valve 3, second collecting pipe 6 to be connected to vacuum generating device 4 on every bar path.
When needing the normal stream value regulating path 1, open the stop valve on path 1, close the stop valve of path 2 ~ path n, then regulate the normal stream value that the needle valve on path 1 makes the flow of path 1 reach required, mode regulates the normal stream value of path 2 ~ path n successively.
The flow number detecting other flowmeters utilizing the normal flow generation device of gas meter, flow meter error of indication monitor station described in the utility model whether accurately time, detected flowmeter is connected to the upstream of proving flowmeter, then utilizing vacuum generating device 4 to produce negative pressure makes air suck from the entrance of detected flowmeter, air is by after entering into the first collecting pipe 5 place after proving flowmeter 1, the second collecting pipe 6 place is flow to by one or several path, the normal stream value of every bar path is regulated in advance by needle valve 3, also can realize several different normal stream value by the combination of different path simultaneously.
Below be only preferred implementation of the present utility model, it should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim limited range.For those skilled in the art, not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. the normal flow generation device of a gas meter, flow meter error of indication monitor station, comprise proving flowmeter (1), stop valve (2), needle valve (3) and vacuum generating device (4), it is characterized in that, described proving flowmeter (1) is connected to the first collecting pipe (5), be connected by path between first collecting pipe (5) with the second collecting pipe (6), and device has stop valve (2) and needle valve (3) on path, the outlet of the second collecting pipe (6) is connected to vacuum generating device (4).
2. the normal flow generation device of gas meter, flow meter error of indication monitor station according to claim 1, it is characterized in that, be connected with the path of two and more parallel between described the first collecting pipe (5) and the second collecting pipe (6), on every bar path, all device has stop valve (2) and needle valve (3).
3. the normal flow generation device of gas meter, flow meter error of indication monitor station according to claim 1, is characterized in that, described proving flowmeter (1) adopts wet flow indicator.
4. the normal flow generation device of gas meter, flow meter error of indication monitor station according to claim 1, is characterized in that, described vacuum generating device (4) adopts vacuum pump, vacuum generator or negative-pressure air fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626676.7U CN204128646U (en) | 2014-10-27 | 2014-10-27 | A kind of normal flow generation device of gas meter, flow meter error of indication monitor station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626676.7U CN204128646U (en) | 2014-10-27 | 2014-10-27 | A kind of normal flow generation device of gas meter, flow meter error of indication monitor station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204128646U true CN204128646U (en) | 2015-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420626676.7U Expired - Fee Related CN204128646U (en) | 2014-10-27 | 2014-10-27 | A kind of normal flow generation device of gas meter, flow meter error of indication monitor station |
Country Status (1)
| Country | Link |
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| CN (1) | CN204128646U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466529A (en) * | 2015-11-17 | 2016-04-06 | 金卡高科技股份有限公司 | Combustion gas meter pulsating flow error double-standard detection system and method |
-
2014
- 2014-10-27 CN CN201420626676.7U patent/CN204128646U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466529A (en) * | 2015-11-17 | 2016-04-06 | 金卡高科技股份有限公司 | Combustion gas meter pulsating flow error double-standard detection system and method |
| CN105466529B (en) * | 2015-11-17 | 2018-09-28 | 金卡智能集团股份有限公司 | The double standard detection systems of gas meter, flow meter pulsation stream error and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610000 Sichuan city of Chengdu province Chenghua District Development Zone Longtan urban industrial into relief road No. 1 Patentee after: SICHUAN HAILI INTELLIGENT & TECHNOLOGY CO., LTD. Address before: 610000 Sichuan city of Chengdu province Chenghua District Development Zone Longtan urban industrial into relief road No. 1 Patentee before: Sichuan Haili Intelligent & Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20171027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |