CN219830046U - Intelligent on-line standard meter method flowmeter calibrating device - Google Patents
Intelligent on-line standard meter method flowmeter calibrating device Download PDFInfo
- Publication number
- CN219830046U CN219830046U CN202321001242.3U CN202321001242U CN219830046U CN 219830046 U CN219830046 U CN 219830046U CN 202321001242 U CN202321001242 U CN 202321001242U CN 219830046 U CN219830046 U CN 219830046U
- Authority
- CN
- China
- Prior art keywords
- intelligent
- oil
- oil inlet
- pipeline
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012937 correction Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims 2
- 238000012795 verification Methods 0.000 abstract description 24
- 238000005259 measurement Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses an intelligent on-line standard meter method flowmeter calibrating device, which comprises: the trolley comprises a frame body and a moving piece arranged at the bottom of the frame body; the oil inlet pipeline is arranged on the frame body, and the end part of the oil inlet pipeline is communicated with the oil outlet of the measured flowmeter; the oil outlet pipeline is arranged on the frame body, and the end part of the oil outlet pipeline is communicated with an oil inlet of the measured flowmeter; the standard meter is positioned on the frame body and comprises a connecting valve which is communicated with the oil inlet pipeline and the oil outlet pipeline, a pulse transmitter for detecting the internal flow of the standard meter is arranged on the connecting valve, the pulse transmitter transmits pulse signals of the standard meter to the intelligent flow indicator, and the intelligent flow indicator is used for displaying flow indication; and comparing the indication displayed by the intelligent flow indicator with the indication displayed by the measured flow indicator to obtain a corresponding flow correction coefficient, and determining the metering performance of the measured flow indicator. The device is integrated on the shallow, and is small in size and convenient to move, and flowmeter verification is more convenient, has avoided the dismouting of many times of measured flowmeter and has transferred the field, reduces the verification error, improves verification efficiency.
Description
Technical Field
The utility model relates to the technical field of flow metering, in particular to an intelligent on-line standard meter method flowmeter calibrating device.
Background
At present, most of positive displacement flow meters applied to aviation kerosene trade handover are above 0.2 level, mainly concentrated on aircraft fuelling vehicles and oil depot supply stations, the verification period is not more than 6 months, and the positive displacement flow meters must be sent to specific metering departments, and offline verification is carried out by using specific verification devices.
The flowmeter is a metering device, and the metering precision is inevitably affected during disassembly, assembly and transportation, so that the offline verification in the flowmeter verification technology has errors. Meanwhile, the flow meter verification of different oil materials needs to be transferred for a plurality of times aiming at different airports, each transfer is required to be disassembled and assembled by equipment, especially the disassembly and assembly of an electric cable are unchanged, the electrical disassembly and assembly efficiency is low, and the work difficulty is brought to metering verification work.
Therefore, aiming at the technical problems, how to avoid the problems of verification errors and low efficiency caused by disassembly and transition of the existing flowmeter is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
The utility model aims to provide an intelligent on-line standard meter method flowmeter calibrating device, which forms an oil product loop through an oil inlet pipeline, an oil outlet pipeline and a measured flowmeter, wherein the standard meter detects the flow of the oil product loop through a pulse verification method, and the standard meter, the oil inlet pipeline and the oil outlet pipeline are arranged on a movable frame body, so that accurate verification and measurement can be completed without disassembling and assembling the measured flowmeter, thereby reducing verification errors and improving working efficiency.
In order to achieve the above object, the present utility model provides an intelligent on-line standard meter method flowmeter calibration device, comprising:
the trolley comprises a frame body and a moving piece, wherein the moving piece is arranged at the bottom of the frame body;
the oil inlet pipeline is arranged on the frame body, and the end part of the oil inlet pipeline is communicated with an oil outlet of the measured flowmeter;
the oil outlet pipeline is arranged on the frame body, and the end part of the oil outlet pipeline is communicated with the oil inlet of the measured flowmeter;
the standard meter is positioned on the frame body and comprises a connecting valve communicated with the oil inlet pipeline and the oil outlet pipeline, a pulse transmitter for detecting the internal flow of the connecting valve is arranged on the connecting valve, the pulse transmitter transmits pulse signals of the pulse transmitter to an intelligent flow indicator, and the intelligent flow indicator is used for displaying flow readings passing through the connecting valve;
and comparing the indication displayed by the intelligent flow indicator with the indication displayed by the measured flow indicator to obtain a corresponding flow correction coefficient, and determining the metering performance of the measured flow indicator.
Preferably, the intelligent flow indicator is further configured to receive a pulse signal of the measured flow meter, obtain a corresponding flow correction coefficient according to the pulse number of the pulse transmitter and the pulse number of the measured flow meter, and determine the metering performance of the measured flow meter.
Preferably, the end part of the oil inlet pipeline is provided with a first self-sealing joint communicated with the oil outlet of the measured flowmeter, and the end part of the outlet pipeline is provided with a second self-sealing joint communicated with the oil inlet of the measured flowmeter.
Preferably, the intelligent flow display instrument is provided with an explosion-proof quick connector electrically connected with external equipment.
Preferably, the oil inlet pipeline and the oil outlet pipeline are provided with a temperature transmitter and a pressure transmitter for detecting the internal temperature and the internal pressure of the oil inlet pipeline and the oil outlet pipeline.
Preferably, the temperature transmitter and the pressure transmitter are electrically connected with the intelligent flow indicator through the explosion-proof quick connector.
Preferably, an explosion-proof battery box is arranged on the frame body, and a battery for providing electric energy for the intelligent flow indicator, the temperature transmitter and the pressure transmitter is arranged in the explosion-proof battery box.
Preferably, an electrostatic grounding reel is provided on the frame body, and the electrostatic grounding reel is used for keeping the frame body and components arranged on the frame body to be grounded electrostatically.
Preferably, the oil inlet pipeline and the oil outlet pipeline are provided with oil discharge valves for discharging oil products in the oil inlet pipeline and the oil outlet pipeline.
Preferably, the oil inlet pipeline is further provided with an emptying pipeline assembly communicated with the oil inlet pipeline, and the emptying pipeline assembly is communicated with the outside air and is used for being matched with the oil discharge valve to discharge oil products in the oil inlet pipeline and the oil outlet pipeline.
Compared with the background technology, the utility model forms an oil product loop of the measured flowmeter through the oil inlet pipeline, the oil outlet pipeline and the connecting valve, then the pulse transmitter detects the flow in the connecting valve and transmits the pulse signal to the intelligent flow indicator, the intelligent flow indicator displays the flow indication passing through the connecting valve, and the flow indication is compared with the indication displayed by the measured flowmeter to obtain a corresponding flow correction coefficient, and the metering performance of the measured flowmeter is determined. Meanwhile, the intelligent flow display instrument can reach 16 nonlinear flow correction points, so that each flow point of the standard flow meter has more linear measurement; and the device is integrated on the shallow, and is small, is convenient for remove, and flowmeter verification is more convenient, has avoided the dismouting of measured flowmeter many times and has transited, reduces the verification error, improves verification efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an intelligent on-line standard meter method flowmeter calibrating device according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a standard meter structure of an intelligent online standard meter method flowmeter calibration device according to an embodiment of the present utility model.
In the figure: 1. the intelligent flow meter comprises a frame body 2, a moving part 3, an oil inlet pipeline 4, an oil outlet pipeline 5, a connecting valve 6, a pulse transmitter 7, an intelligent flow indicator 8, a first self-sealing joint 9, a second self-sealing joint 10, an explosion-proof quick joint 11, a temperature transmitter 12, a pressure transmitter 13, an explosion-proof battery box 14, an electrostatic grounding reel 15, an emptying pipeline assembly 16 and an oil discharging valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model will be further described in detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the aspects of the present utility model.
It should be noted that, in the present embodiment, the orientation or positional relationship indicated by "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 and 2 of the specification, in this embodiment, an intelligent on-line standard meter method flowmeter calibration device is provided, the device includes a cart, an oil inlet pipe 3, an oil outlet pipe 4 and a standard meter, the cart includes a frame body 1 and a moving member 2, the moving member 2 is arranged at the bottom of the frame body 1, and can assist the frame body 1 to walk, meanwhile, the oil inlet pipe 3, the oil outlet pipe 4 and the standard meter are integrated on the frame body 1, the whole volume of the device is small, and the device is convenient to move or transport in a vehicle.
As shown in fig. 1, the frame 1 may be a base plate and frame, or may be a structure similar to a cart, which is not limited too much, so as to ensure high stability of the frame 1. The moving part 2 is a roller or other travelling wheels, can assist the cart to walk, and can facilitate the staff to push and walk when the oil inlet pipeline 3, the oil outlet pipeline 4 and the standard meter are placed on the frame body 1, and the device is flexible to move, strong in stability, safe and practical.
The oil inlet pipeline 3 is fixedly arranged on the frame body 1, the end part of the oil inlet pipeline is communicated with the oil outlet of the measured flowmeter, the existing measured flowmeter is generally connected with the equipment body, the oil flow in the equipment can be detected, the oil inlet pipeline 3 is communicated with the oil outlet of the measured flowmeter, and the oil in the equipment can flow into the oil inlet pipeline 3, so that the flow detected by the standard meter and the flow detected by the measured flowmeter are the same oil, and the detection error is reduced.
On the basis of the oil inlet pipeline 3, the utility model is also provided with the oil outlet pipeline 4, the oil outlet pipeline 4 can be communicated with the oil inlet of the measured flowmeter, namely, an oil product loop is formed through the oil inlet pipeline 3 and the oil outlet pipeline 4, and the oil product flows through the oil inlet pipeline 3 and then flows into the oil inlet of the measured flowmeter again through the oil outlet pipeline 4 after flowing through the standard meter, so that the waste of the oil product is prevented.
It is noted that, when the oil product flows through the standard meter, the standard meter is provided with a connecting valve 5 for communicating the oil inlet pipeline 3 and the oil outlet pipeline 4, and the connecting valve 5 can be communicated with the oil inlet pipeline 3 and the oil outlet pipeline 4 in a flange connection manner, and of course, in order to ensure the connection tightness of the three components, sealing components such as a sealing ring can be added at the flange. In addition, the standard meter further comprises a pulse transmitter 6 and an intelligent flow indicator 7, wherein the pulse transmitter 6 is arranged on the connecting valve 5, and the oil flow is detected through a pulse verification method, so that uncertainty errors caused by manually starting and stopping the valve are avoided, and more accurate verification and measurement of the measured meter are realized. The pulse transmitter 6 transmits the detected pulse signal to the intelligent flow indicator 7, and the intelligent flow indicator 7 can display the detected oil flow and then compare with the oil flow displayed by the measured flow meter to obtain a corresponding flow correction coefficient, so as to determine the metering performance of the measured flow meter.
In summary, the oil circuit of the measured flowmeter is formed by the oil inlet pipeline 3, the oil outlet pipeline 4 and the connecting valve 5, the internal flow of the connecting valve 5 is detected by the pulse transmitter 6, the pulse signal is transmitted to the intelligent flow indicator 7, the intelligent flow indicator 7 displays the flow indication passing through the connecting valve 5, the flow indication is compared with the flow indication displayed by the measured flowmeter, the corresponding flow correction coefficient is obtained, and the metering performance of the measured flowmeter is determined. Meanwhile, in order to enable the standard meter to be more accurate in metering, the intelligent flow display instrument 7 can reach 16 nonlinear flow correction points, so that each flow point of the standard flow meter has more linear metering; and the device is integrated on the shallow, and is small, is convenient for remove, and flowmeter verification is more convenient, has avoided the dismouting of measured flowmeter many times and has transited, reduces the verification error, improves verification efficiency.
In addition, the intelligent flow indicator 7 can be connected to the measured flow meter and transmit pulse signals with the measured flow meter, that is, the intelligent flow indicator 7 can be connected to the pulse signals of the standard meter and the measured flow meter at the same time, and the volume passing through the flow meter can be obtained according to the pulse number of the pulse transmitter 6 and the pulse number of the measured flow meter, so that the corresponding flow correction coefficient can be obtained, and the metering performance of the measured flow meter can be determined.
The oil inlet pipeline 3 is provided with a first self-sealing joint 8 communicated with an oil outlet of a measured flowmeter, the outlet pipeline is provided with a second self-sealing joint 9 communicated with an oil inlet of the measured flowmeter, and the first self-sealing joint 8 and the second self-sealing joint 9 are two-way self-sealing joints and can be used as transition devices for pipeline and pipeline connection, so that the joint has excellent sealing performance. Of course, a nipple valve or other connection may be employed herein, which facilitates installation of the oil discharge valve 16 or the drain line assembly 15, and facilitates draining and replacement of the verification medium, which will not be described in detail herein, and which is within the scope of the present utility model.
In addition, an explosion-proof quick connector 10 electrically connected with external equipment is further arranged on the intelligent flow indicator 7, and the explosion-proof quick connector 10 can be externally connected with a power supply, a temperature transmitter 11, a pressure transmitter 12, a measured flow meter and the like, so that an electric signal of the external equipment can be quickly transmitted to the intelligent flow indicator 7; of course, the explosion-proof fire-proof grade of the oil product equipment is required to be higher, so that the oil product equipment is arranged in an explosion-proof mode.
It has been pointed out above that the apparatus may be provided with temperature transmitter 11 and pressure transmitter 12, and therefore, in the present embodiment, temperature transmitter 11 and pressure transmitter 12 for detecting the internal temperature and pressure thereof are provided on oil inlet pipe 3 and oil outlet pipe 4; it should be noted that, because the temperature and pressure of the oil will have a certain influence on the measured flow, in order to consider the image, the utility model collects the temperature and pressure information of the oil through the temperature transmitter 11 and the pressure transmitter 12, and the temperature transmitter 11 and the pressure transmitter 12 are electrically connected with the intelligent flow display 7 through the explosion-proof quick connector 10, so that the temperature and pressure information is displayed on the intelligent flow display 7 for the staff to record and reference, thereby reducing the influence of the temperature and the pressure on the oil flow measurement.
For the temperature transmitter 11 and the pressure transmitter 12, when the electric signals of the two are connected to the intelligent flow indicator 7, the influence of temperature and pressure on the oil flow is brought into the calculation of the actual volume according to the verification procedure of JJG667-2010 liquid volumetric flowmeter.
In addition, still be provided with explosion-proof battery box 13 on the support body 1, be provided with the battery that is used for providing the electric energy for intelligent flow display 7, temperature transmitter 11, pressure transmitter 12 in the explosion-proof battery box 13, the battery can adopt chargeable formula, increases battery cruising ability, improves the device availability factor.
In order to meet the safety conditions of oil measurement, the frame body 1 is further provided with an electrostatic grounding coil 14 disc, and the electrostatic grounding coil 14 can keep the frame body 1 and parts arranged on the frame body 1 to be grounded electrostatically, so that potential safety hazards caused by static electricity are reduced.
Further, the oil discharge valve 16 for discharging oil in the oil inlet pipeline 3 and the oil outlet pipeline 4 is arranged on the oil inlet pipeline 3 and the oil outlet pipeline 4, and the joint valve can be arranged at the end parts of the oil inlet pipeline 3 and the oil outlet pipeline 4, so that the oil discharge valve 16 can be arranged on the joint valve; of course, it is also possible to provide the oil inlet pipe 3 and the oil outlet pipe 4 directly, and to seal the oil discharge valve 16 to the pipes by flanges, without being limited thereto.
In addition, an evacuation pipeline assembly 15 communicated with the oil inlet pipeline 3 is arranged on the oil inlet pipeline 3, the other end of the evacuation pipeline assembly 15 is communicated with the outside air, and when the oil discharge valve 16 is opened to discharge oil, the oil inlet pipeline 3 and the oil outlet pipeline 4 are sealed, so that the evacuation pipeline assembly 15 communicated with the outside air is required to be arranged on the pipeline, and the pressure difference between the oil inlet pipeline 4 and the oil outlet pipeline 5 and the outside air does not exist, thereby ensuring that the oil discharge valve 16 can discharge oil normally. Of course, the drain line assembly 15 is in a sealed condition during normal use to ensure that oil is able to pass stably through the connecting valve 5. Meanwhile, the oil inlet pipeline 3, the oil outlet pipeline 4 and the connecting valve 5 can be flushed and circulated through the emptying pipeline assembly 15, so that the purpose of oil replacement is achieved.
It should be noted that, the above standard table may be selected from a plurality of types, including but not limited to detecting the flow, and may also be a mass flowmeter, a volume flowmeter, a calorimeter, etc., so that the standard table may be used for measuring gas, other liquids, etc., and only the pulse transmitter 6 needs to be replaced with a detecting device corresponding to the detected gas or other liquids, and the detected signal is transmitted to the intelligent flow indicator 7, and only the pulse transmitter 6 needs to be replaced.
It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. An intelligent on-line standard meter method flowmeter calibrating device, comprising:
the trolley comprises a frame body and a moving piece, wherein the moving piece is arranged at the bottom of the frame body;
the oil inlet pipeline is arranged on the frame body, and the end part of the oil inlet pipeline is communicated with an oil outlet of the measured flowmeter;
the oil outlet pipeline is arranged on the frame body, and the end part of the oil outlet pipeline is communicated with the oil inlet of the measured flowmeter;
the standard meter is positioned on the frame body and comprises a connecting valve communicated with the oil inlet pipeline and the oil outlet pipeline, a pulse transmitter for detecting the internal flow of the connecting valve is arranged on the connecting valve, the pulse transmitter transmits pulse signals of the pulse transmitter to an intelligent flow indicator, and the intelligent flow indicator is used for displaying flow readings passing through the connecting valve;
and comparing the indication displayed by the intelligent flow indicator with the indication displayed by the measured flow indicator to obtain a corresponding flow correction coefficient, and determining the metering performance of the measured flow indicator.
2. The intelligent on-line standard meter method flowmeter calibration device of claim 1, wherein the intelligent flow indicator is further configured to receive pulse signals of the measured flow meter, obtain corresponding flow correction coefficients according to the number of pulses of the pulse transmitter and the number of pulses of the measured flow meter, and determine the metering performance of the measured flow meter.
3. The intelligent on-line standard meter method flowmeter calibration device of claim 2, wherein the oil inlet pipe end is provided with a first self-sealing joint in communication with the measured flowmeter oil outlet, and the outlet pipe end is provided with a second self-sealing joint in communication with the measured flowmeter oil inlet.
4. The intelligent on-line standard meter method flowmeter calibration device of any one of claims 1-3, wherein the intelligent flow indicator is provided with an explosion-proof quick connector electrically connected with an external device.
5. The intelligent on-line standard meter method flowmeter calibration device of claim 4, wherein the oil inlet pipeline and the oil outlet pipeline are provided with a temperature transmitter and a pressure transmitter for detecting the internal temperature and pressure.
6. The intelligent on-line standard meter method flowmeter calibration device of claim 5, wherein the temperature transmitter and the pressure transmitter are electrically connected to the intelligent flow indicator through the explosion-proof quick connector.
7. The intelligent on-line standard meter method flowmeter calibration device of claim 6, wherein an explosion-proof battery box is arranged on the frame body, and a battery for providing electric energy for the intelligent flow indicator, the temperature transmitter and the pressure transmitter is arranged in the explosion-proof battery box.
8. The intelligent on-line standard meter method flowmeter calibration device of claim 7, wherein the frame is provided with an electrostatic grounding reel for holding the frame and components disposed on the frame to be electrostatically grounded.
9. The intelligent on-line standard meter method flowmeter calibration device of claim 8, wherein the oil inlet pipeline and the oil outlet pipeline are provided with oil discharge valves for discharging oil products in the oil inlet pipeline and the oil outlet pipeline.
10. The intelligent on-line standard meter method flowmeter calibration device according to claim 9, wherein the oil inlet pipeline is further provided with an emptying pipeline assembly communicated with the oil inlet pipeline, and the emptying pipeline assembly is communicated with the outside air and is used for discharging oil products in the oil inlet pipeline and the oil outlet pipeline in cooperation with the oil discharge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321001242.3U CN219830046U (en) | 2023-04-28 | 2023-04-28 | Intelligent on-line standard meter method flowmeter calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321001242.3U CN219830046U (en) | 2023-04-28 | 2023-04-28 | Intelligent on-line standard meter method flowmeter calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219830046U true CN219830046U (en) | 2023-10-13 |
Family
ID=88286012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321001242.3U Active CN219830046U (en) | 2023-04-28 | 2023-04-28 | Intelligent on-line standard meter method flowmeter calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219830046U (en) |
-
2023
- 2023-04-28 CN CN202321001242.3U patent/CN219830046U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102889906B (en) | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof | |
| CN101629837A (en) | Liquid turbine flow meter and flow measuring method thereof | |
| WO2019000258A1 (en) | Gas turbine flowmeter detection device and detection method | |
| CN201269813Y (en) | Synthetic detection instrument for oil gas recovery | |
| CN201440079U (en) | Liquid turbine flowmeter | |
| CN104776896A (en) | Dynamic verification system and method of liquid flow instrument | |
| CN102735291B (en) | Gas flowmeter and metering method thereof | |
| CN202836631U (en) | Single-pipe buchholz relay detecting platform and centring clamping mechanism special for buchholz relay detection | |
| CN219830046U (en) | Intelligent on-line standard meter method flowmeter calibrating device | |
| CN201188012Y (en) | Laminar flowmeter for measuring instantaneous flow of engine | |
| CN204165628U (en) | A kind of vehicular Oil Flowmeter Standard Apparatus | |
| CN102133982B (en) | Full-function metering and alarming system of oil tank | |
| CN207991653U (en) | A kind of packaged type fluid flow caliberating device | |
| US4945754A (en) | Test water meter with digital display | |
| CN102279029A (en) | Self-calibrating putting-into-type pressure liquid level meter and measuring method thereof | |
| CN213397284U (en) | Tool vehicle with gas flow calibration function | |
| CN116608928A (en) | Calibrating device of piston type small-flow gas flowmeter | |
| CN201514259U (en) | Device for calibrating liquid flowmeters | |
| CN215178263U (en) | Online comparison and calibration device for thermometer | |
| CN215909939U (en) | Small-size intelligent on-site gas flow standard device | |
| CN201191213Y (en) | Weighing type level meter | |
| CN117516671B (en) | Mobile standard device for calibrating flowmeter of aircraft fuelling vehicle | |
| CN207585729U (en) | A kind of heavy caliber fluid flowmeter on-line calibration device | |
| CN220230671U (en) | Flowmeter on-line verification device | |
| CN217276422U (en) | Monitoring device of IC card prepayment steam flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |