CN218349592U

CN218349592U - Distributed standard meter system

Info

Publication number: CN218349592U
Application number: CN202221637486.6U
Authority: CN
Inventors: 田金风; 李仲博; 王醒; 孟涛; 李晓鹏; 辛瑞峰; 康焱; 钳锋; 段长亮; 李墨; 韩俊锋; 邓羽声; 韩铭欢; 李鑫
Original assignee: BEIJING DISTRICT HEATING GROUP; National Institute of Metrology
Current assignee: BEIJING DISTRICT HEATING GROUP; National Institute of Metrology
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-01-20
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a distributed standard meter system, which comprises a standard meter group and a tested meter, wherein the inlet and the outlet of the tested meter are respectively connected in series with a first test pipe section and a second test pipe section; the standard table group comprises a standard table group I and a standard table group II; the standard meter group I and the standard meter group II comprise a plurality of standard meters, and the standard meters of the standard meter group I and the standard meter group II are connected in parallel; the first standard meter group is connected with a test pipe section in parallel and is connected with the detected meter in series, and the second standard meter group is connected with the second test pipe section in series; and the first test pipe section is provided with at least one two-way valve. The utility model discloses a distributed standard table system not only uses in a flexible way, can satisfy various detection demands, uses through the combination of two sets of standard table groups moreover, can realize the automatic check of parts such as system's valve, standard table, helps the problem that the discovery system takes place in time.

Description

Distributed standard meter system

Technical Field

The utility model relates to an instrument technical field, concretely relates to distributing type standard table system.

Background

At present, a static mass method and a standard meter method are generally adopted for verification and calibration of a flow meter, although the precision of a flow device is high by the static mass method, one-time investment is large, the verification procedure of the static mass method is complex, the requirement on detection personnel is high, the verification time is long, and the efficiency is low.

The standard meter method is to use a standard flowmeter (which may be a velocity type flowmeter, a volume type flowmeter, a critical flow flowmeter, a mass flowmeter, etc.) as a standard, make a fluid continuously pass through the standard flowmeter and a detected flowmeter at the same time interval, and compare output flow values of the standard flowmeter and the detected flowmeter, thereby determining the metering performance of the detected flowmeter. The precision measuring instrument has low cost and high efficiency, and is more and more emphasized as the precision requirement of the industrial instrument can be met.

In the existing standard meter method flow device, a standard meter group is arranged at the front end or the rear end of a to-be-detected meter and is connected with a to-be-detected meter pipeline in series so as to trace the quantity value of the to-be-detected meter. As shown in fig. 1. In fig. 1, a water storage tank 1, a water pump 2, a pressure stabilizing tank 3, a to-be-detected meter 4, a meter clamping device 5 and a standard meter group 6 are sequentially connected to form a loop, so that a to-be-detected meter verification process is realized; and all the standard tables in the standard table group are connected in parallel.

Although the standard meter method is low in cost and high in efficiency, the standard meter is required to be disassembled and checked every year due to the fact that the standard meter is required to be traced to the quality method, the standard meter is installed back to a pipeline after being checked, and if the standard meter is inaccurate in metering performance due to the problems of protruding of a gasket, centering of the pipeline and the like in the installation process, the standard meter cannot be found in the actual use process. In addition, when a single standard meter is used, if the metering performance of the meter is in problem, the problem is difficult to find in time in the experiment process.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art, the utility model aims at providing a distributing type standard table system.

In order to realize the purpose, the utility model adopts the following technical scheme:

a distributed standard meter system comprises a standard meter group and a to-be-detected meter, wherein an inlet and an outlet of the to-be-detected meter are respectively connected in series with a first testing pipe section and a second testing pipe section; the standard table group comprises a standard table group I and a standard table group II; the standard meter group I and the standard meter group II comprise a plurality of standard meters, and the standard meters of the standard meter group I and the standard meter group II are connected in parallel; the first standard meter group is connected with a test pipe section in parallel and is connected with the detected meter in series, and the second standard meter group is connected with the second test pipe section in series; and the first test pipe section is provided with at least one two-way valve.

Further, the standard meter of the standard meter group I and the standard meter group II is a flowmeter with the same brand and the same specification.

Furthermore, in the first standard meter group and the second standard meter group, the inlet and the outlet of each standard meter are connected with a three-way valve, the three-way valves connected with the inlet of the standard meters are connected in sequence, and the three-way valves connected with the outlet of the standard meters are connected in sequence; in the first standard meter group, two three-way valves connected with the standard meter closest to the first test pipe section are respectively connected with the first test pipe section through at least one two-way valve to form parallel connection.

Further, the outlet of each standard meter is connected with a linear regulating valve in series.

Furthermore, the outlet of the to-be-detected meter is also connected in series with a third testing pipe section, the third testing pipe section is connected in parallel with a second testing pipe section, and the second testing pipe section and the third testing pipe section are respectively provided with at least one two-way valve.

The beneficial effects of the utility model reside in that: the utility model discloses a distributed standard table system not only uses in a flexible way, can satisfy various detection demands, uses through the combination of two sets of standard table groups moreover, can realize the automatic check of parts such as system's valve, standard table, helps the problem that the discovery system takes place in time.

Drawings

FIG. 1 is a schematic diagram of a conventional standard meter-based flow device;

fig. 2 is a schematic diagram of the overall structure of the system according to the embodiment of the present invention;

fig. 3 is a schematic view of a first usage of the system according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a second usage of the system according to an embodiment of the present invention;

fig. 5 is a schematic view of a third usage of the system in an embodiment of the present invention;

fig. 6 is a schematic diagram of one of the problems that may occur in the system according to the embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.

The embodiment provides a distributed standard meter system, as shown in fig. 2, including a standard meter group and a to-be-detected meter 300, where an inlet and an outlet of the to-be-detected meter 300 are respectively connected in series to a first test pipe segment and a second test pipe segment; the standard table group comprises a first standard table group 100 and a second standard table group 200; the first standard meter group 100 and the second standard meter group 200 both comprise a plurality of standard meters, and the standard meters of the first standard meter group and the second standard meter group are connected in parallel; the first standard meter group is connected with a test pipe section in parallel and is connected with the to-be-detected meter 300 in series, and the second standard meter group is connected with the second test pipe section in series; and the first test pipe section is provided with at least one two-way valve.

Specifically, in order to make the metering performance of the two standard meter sets consistent as much as possible, the standard meters of the standard meter set one and the standard meter set two are flowmeters of the same brand and the same specification. That is, the model, caliber, flow range, etc. of each standard meter are all consistent.

In this embodiment, in the first standard meter group and the second standard meter group, the inlet and the outlet of each standard meter are connected to a three-way valve, the three-way valves connected to the inlet of the standard meter are connected in sequence, and the three-way valves connected to the outlet of the standard meter are connected in sequence. The three-way valve is used for selecting a used standard table; in the first standard meter group, two three-way valves connected with the standard meter closest to the first test pipe section are respectively connected with the first test pipe section through at least one two-way valve to form parallel connection.

Specifically, as shown in fig. 2, the first standard table group includes three standard tables F1, F2, and F3, where the inlet and the outlet of F2 are respectively connected to one port of the three-way valves S2 and S3, the inlet and the outlet of F3 are respectively connected to one port of the three-way valves S1 and S4, and the inlet and the outlet of F1 are respectively connected to the other port of the three-way valves S2 and S3; the three-way valve S2 connected with the inlet of the standard meter is connected with the three-way valve S1, and the three-way valve S3 connected with the outlet of the standard meter is connected with the three-way valve S4. The standard meter group two comprises three standard meters F4, F5 and F6, wherein the inlet and the outlet of the F5 are respectively connected with one port of the three-way valve S6 and one port of the three-way valve S7, the inlet and the outlet of the F6 are respectively connected with one port of the three-way valve S5 and one port of the three-way valve S8, and the inlet and the outlet of the F4 are respectively connected with the other end ports of the three-way valve S6 and the three-way valve S7. And the three-way valve S5 and the three-way valve S6 which are connected with the inlet of the standard meter are connected, and the three-way valve S7 and the three-way valve S8 which are connected with the outlet of the standard meter are connected. And the three-way valves S1 and S4 connected with the standard meter F3 closest to the first test pipe section in the first standard meter group are respectively connected with the first test pipe section through the two-way valves V1 and V2. And the second standard meter group is connected in series to the second test pipe section through three-way valves S5 and S8. And a two-way valve V3 is arranged on the first test pipe section.

Specifically, a linear regulating valve 500 is connected in series with the outlet of each standard meter, and the linear regulating valve 500 is used for regulating the pressure and the flow in the pipeline.

It should be noted that the meter 300 under test can be inserted into one of the test pipe sections through the meter holder 400. The meter clamping device is mainly used for pipeline length compensation and instrument or part clamping on the pipeline, and can be flexibly disassembled and freely stretched.

In this embodiment, the outlet of the examined meter 300 is further connected in series to a third testing pipe section, the third testing pipe section and the second testing pipe section are connected in parallel, and at least one two-way valve, such as V4 and V5 in fig. 2, is respectively disposed on the second testing pipe section and the third testing pipe section.

The distributed standard table system can realize the independent use of the standard table group I or the independent use of the standard table group II, and also can realize the combined use of the standard table group I and the standard table group II.

If the standard meter group I needs to be used independently, V3 is closed, V1 and V2 are opened, and the port of the three-way valve connected with the standard meter to be used in the standard meter group I is conducted, and F3 is used in FIG. 3, so that the ports of S1 and S4 connected with F3 are conducted, and the ports of S1 and S4 connected with S2 and S3 are closed. And meanwhile, the V4 is closed, the V5 is opened, and then the liquid flows out of the third testing pipe section after passing through the tested meter and does not pass through the second standard meter group.

As shown in fig. 4, if the standard table group two needs to be used alone, V1 and V2 are closed, V3 and V4 are opened, V5 is closed, and the port of the three-way valve connected to the standard table selected to be used in the standard table group two is opened. For example, in fig. 4, when F6 is used, the ports of the three-way valves S5 and S8 connected to F6 are opened, and the ports of the three-way valves S5 and S8 connected to S6 and S7 are closed. At this time, the liquid does not pass through the first standard set of tables, but only passes through the second standard set of tables.

If the standard meter group one and the standard meter group two need to be used simultaneously, V3 and V5 are closed, V4, V1 and V2 are opened, and the three-way valve port connected with the selected standard meter to be used is opened, as shown in FIG. 5. For example, in fig. 5, if F3 is selected to be used for the standard table group one and F6 is selected to be used for the standard table group two, the ports of S1 and S4 connected to F3 and the ports of S5 and S8 connected to F6 are turned on.

Furthermore, by utilizing the distributed standard table system, a checking function can be realized, and the effectiveness of the detection process is guaranteed. Taking fig. 5 as an example, the liquid flows through the standard table F3, the table to be examined, and the standard table F6. F3 and F6 are two flowmeters of the same brand, the same specification, the same precision and the same flow range. In one test, the system can record the pulse number output by two standard meters at the same time and calculate the standard value. If the difference between the standard quantity values output by the two standard tables is large, it is indicated that the metering performance of the standard tables possibly has problems, and the standard tables need to be checked, and even sent to a laboratory again for tracing.

Furthermore, in the water flow device, the number of the supporting devices such as general valves is large, and after years of use, the problems of poor sealing, internal leakage and the like of the valves mostly occur. In a test, if the liquid flowing through the tested meter does not completely flow through the standard meter due to the sealing of the valve, the metering can be inaccurate. As shown in fig. 6, if the liquid flows through the standard meter F3 and the meter to be tested, a part of the liquid is shunted due to the poor sealing of the valve V5, and then flows through the standard meter F6, the metering of F6 is inaccurate. At this time, if there is no standard value measured by the front-end standard meter, the system may mistakenly consider that the measurement of the table to be detected is not accurate, resulting in erroneous judgment of the table to be detected.

If the pipeline has no valve sealing problem, instantaneous flow values fed back by the two sets of standard meter groups are close to each other, and if the difference is large, a problem occurs between the two sets of standard meter groups, and the system needs to be checked.

Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.

Claims

1. A distributed standard meter system is characterized by comprising a standard meter group and a to-be-detected meter, wherein an inlet and an outlet of the to-be-detected meter are respectively connected in series with a first test pipe section and a second test pipe section; the standard table group comprises a standard table group I and a standard table group II; the standard meter group I and the standard meter group II comprise a plurality of standard meters, and the standard meters of the standard meter group I and the standard meter group II are connected in parallel; the standard meter group I is connected with the test pipe section in parallel and is connected with the tested meter in series, and the standard meter group II is connected with the test pipe section II in series; and the first test pipe section is provided with at least one two-way valve.

2. The distributed reference meter system of claim 1, wherein the reference meters of reference meter set one and reference meter set two are all the same meter of the same brand.

3. The distributed standard meter system of claim 1, wherein in the standard meter group one and the standard group two, the inlet and the outlet of each standard meter are connected to a three-way valve, the three-way valves connected to the inlet of the standard meter are connected in sequence, and the three-way valves connected to the outlet of the standard meter are connected in sequence; in the first standard meter group, two three-way valves connected with the standard meter closest to the first test pipe section are respectively connected with the first test pipe section through at least one two-way valve to form parallel connection.

4. A distributed calibration gauge system according to claim 1 or 3, wherein the outlet of each calibration gauge is connected in series with a linear regulating valve.

5. The distributed standard meter system of claim 1 or 3, wherein the outlet of the meter to be tested is further connected in series with a third testing pipe section, the third testing pipe section and the second testing pipe section are connected in parallel, and at least one two-way valve is respectively arranged on the second testing pipe section and the third testing pipe section.