CN112179452A - Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter - Google Patents
Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter Download PDFInfo
- Publication number
- CN112179452A CN112179452A CN201910600828.3A CN201910600828A CN112179452A CN 112179452 A CN112179452 A CN 112179452A CN 201910600828 A CN201910600828 A CN 201910600828A CN 112179452 A CN112179452 A CN 112179452A
- Authority
- CN
- China
- Prior art keywords
- pressure side
- negative pressure
- flange
- negative
- liquid level
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
- G01F23/164—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid using a diaphragm, bellow as transmitting element
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides a method for modifying a double-flange remote transmission liquid level meter into a blowing liquid level meter, belonging to the field of liquid level meters. The double-flange remote transmission liquid level meter comprises a positive pressure side flange, a positive pressure side membrane, a positive pressure side capillary tube, a transmitter body, a negative pressure side capillary tube, a negative pressure side membrane and a negative pressure side flange, and the method comprises the following steps: disconnecting the negative pressure side capillary tube from the transmitter body; the transmitter body is communicated with an upper cavity in the reaction kettle through a negative pressure side pressure leading pipe; the blowing liquid level meter is formed by a positive pressure side flange, a positive pressure side diaphragm, a positive pressure side capillary tube, a transmitter body and a negative pressure side pressure leading tube. By adopting the method, the double-flange remote liquid level meter with damaged parts such as the negative pressure side flange, the negative pressure side diaphragm or the negative pressure side capillary tube on the negative pressure side can be transformed into the blowing liquid level meter in the operation process of the reaction kettle, so that the liquid level in the reaction kettle can be continuously measured.
Description
Technical Field
The invention relates to the field of liquid level meters, in particular to a method for modifying a double-flange remote transmission liquid level meter into a blowing liquid level meter.
Background
In the industrial field, it is often necessary to measure the liquid level in a reaction vessel using a level gauge.
As shown in fig. 1, a commonly used dual-flange remote transmission liquid level meter mainly includes a positive pressure side flange 1, a positive pressure side capillary tube 2, a transmitter body 3, a negative pressure side capillary tube 4 and a negative pressure side flange 5, wherein a positive pressure side diaphragm is installed on the upper portion of the positive pressure side flange 1, and a negative pressure side diaphragm is installed on the lower portion of the negative pressure side flange 5. The pressure of the upper cavity in the reaction kettle can be transmitted to the transmitter body 3 through the negative pressure side diaphragm and the negative pressure side capillary tube 4, the pressure of the bottom of the liquid in the reaction kettle can be transmitted to the transmitter body 3 through the positive pressure side diaphragm and the positive pressure side capillary tube 2, the transmitter body 3 can calculate a pressure difference value according to the received two paths of pressure, and finally, the liquid level in the reaction kettle can be calculated according to the pressure difference value and the density of the liquid in the reaction kettle.
However, when the dual-flange remote liquid level meter is used, the negative pressure side flange 5 and the negative pressure side diaphragm on the negative pressure side are easily damaged, so that the liquid level meter cannot normally work. When the reaction kettle works, the negative pressure side flange 5 cannot be randomly disassembled and replaced for safety. Therefore, the dual-flange remote liquid level meter cannot work normally.
Disclosure of Invention
The invention provides a method for modifying a double-flange remote liquid level meter into a blowing liquid level meter, which is used for modifying the double-flange remote liquid level meter into the blowing liquid level meter in the operation process of a reaction kettle so as to continuously measure the liquid level.
In order to achieve the above object, the present invention provides a method of modifying a double-flange remote level meter into an air blowing level meter, the double-flange remote level meter being used for measuring a liquid level in a reaction vessel, the double-flange remote level meter including a positive pressure side flange, a positive pressure side diaphragm, a positive pressure side capillary, a transmitter body, a negative pressure side capillary, a negative pressure side diaphragm and a negative pressure side flange, the positive pressure side flange being communicated with the transmitter body through the positive pressure side capillary, the negative pressure side flange being communicated with the transmitter body through the negative pressure side capillary, the positive pressure side diaphragm being mounted on an upper portion of the positive pressure side flange, the negative pressure side diaphragm being mounted on a lower portion of the negative pressure side flange, the method comprising:
disconnecting the negative pressure side capillary tube from the transmitter body;
the transmitter body is communicated with an upper cavity in the reaction kettle through a negative pressure side pressure leading pipe;
the positive pressure side flange, the positive pressure side diaphragm, the positive pressure side capillary tube, the transmitter body and the negative pressure side pressure leading tube form a blowing liquid level meter.
Optionally, the blowing liquid level meter further comprises a gas source, and the gas source is communicated with the upper cavity in the reaction kettle and the transmitter body.
Optionally, the negative pressure side pressure introduction pipe comprises a first negative pressure side pressure introduction pipe and a second negative pressure side pressure introduction pipe, and the first negative pressure side pressure introduction pipe is used for communicating an upper cavity in the reaction kettle with the gas source;
and the second negative side pressure leading pipe is used for communicating the gas source with the transmitter body.
Optionally, the blowing liquid level meter further comprises a negative pressure side pressure leading interface;
the first negative side pressure leading pipe, the second negative side pressure leading pipe and the air source are communicated through the negative side pressure leading interface.
Optionally, the reaction kettle comprises a valve and a first joint, one end of the first negative side pressure guiding pipe is communicated with the first joint, and the other end of the first negative side pressure guiding pipe is communicated with the negative side pressure guiding interface;
the valve is used for controlling the connection or disconnection state between the upper cavity in the reaction kettle and the first negative pressure side pressure leading pipe.
Optionally, the first joint is a two-way joint or a three-way joint.
Optionally, one end of the second negative side pressure leading pipe is communicated with the transmitter body through a second joint, and the second joint is matched with one end of the second negative side pressure leading pipe and the tail end of the negative side capillary pipe.
Optionally, the blowing liquid level meter further comprises a pressure regulating valve, and the air source is transmitted to the negative pressure side pressure leading interface through the pressure regulating valve.
The method for modifying the double-flange remote liquid level meter into the air blowing liquid level meter can modify the double-flange remote liquid level meter with damaged parts such as the negative pressure side flange, the negative pressure side diaphragm or the negative pressure side capillary tube on the negative pressure side into the air blowing liquid level meter in the operation process of the reaction kettle, thereby continuously measuring the liquid level in the reaction kettle.
Drawings
FIG. 1 is a schematic structural diagram of a double-flange remote liquid level meter;
FIG. 2 is a flow chart of a method of retrofitting a dual flange remote fluid level gauge into a blow gas level gauge provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a blowing liquid level meter obtained by modifying a dual-flange remote liquid level meter according to an embodiment of the present invention;
fig. 4 is a partially enlarged schematic view of the position of the second joint 17 in fig. 3.
[ reference numerals are described below ]:
1-a positive pressure side flange; 2-a positive pressure side capillary; 3-a transmitter body; 4-negative pressure side capillary; 5-negative pressure side flange.
11-a gas source; 12-a first negative side pressure leading pipe; 13-a second negative side pressure leading pipe; 14-negative pressure side pressure leading interface; 15-a valve; 16-a three-way connection; 17-a second linker; 18-a pressure regulating valve; 19-positive pressure side flange; 20-positive pressure side capillary; 21-a transmitter body; 22-negative pressure side capillary; 23-negative pressure side flange.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, a method for modifying a dual-flange remote fluid level gauge into a blow-on fluid level gauge, as set forth in the following, is described in further detail with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The embodiment of the invention provides a method for transforming a double-flange remote transmission liquid level meter into an air blowing liquid level meter, wherein the double-flange remote transmission liquid level meter is used for measuring the liquid level in a reaction kettle, as shown in figure 3, the double-flange remote transmission liquid level meter comprises a positive pressure side flange 19, a positive pressure side capillary tube 20, a transmitter body 21, a negative pressure side capillary tube 22, a negative pressure side flange 23, a positive pressure side membrane and a negative pressure side membrane, the positive pressure side flange 19 is communicated with the transmitter body 21 through the positive pressure side capillary tube 20, the negative pressure side flange 23 is communicated with the transmitter body 21 through the negative pressure side capillary tube 22, the positive pressure side membrane is arranged at the upper part of the positive pressure side flange, and the negative pressure side membrane is arranged at the lower part of the negative pressure. The method for modifying the double-flange remote liquid level meter into the blowing liquid level meter is shown in figure 2 and comprises the following steps:
s101: and disconnecting the negative pressure side capillary tube from the transmitter body.
In actual operation, the negative pressure side capillary 22 can be cut off by using a tool clamp, and the connection between the negative pressure side capillary 22 and the transmitter main body 21 can be disconnected.
S102: the transmitter body is communicated with an upper cavity in the reaction kettle through a negative pressure side pressure leading pipe.
In practice, the transmitter body 21 and the upper cavity in the reaction kettle can be communicated through a negative pressure side pressure guiding pipe, so that the pressure of the upper cavity in the reaction kettle is transmitted to the transmitter body 21.
S103: the blowing liquid level meter is formed by a positive pressure side flange, a positive pressure side diaphragm, a positive pressure side capillary tube, a transmitter body and a negative pressure side pressure leading tube.
The method for modifying the double-flange remote liquid level meter into the air blowing liquid level meter can modify the double-flange remote liquid level meter with damaged parts such as a negative pressure side flange, a negative pressure side diaphragm or a negative pressure side capillary tube and the like into the air blowing liquid level meter in the operation process of the reaction kettle, namely modify the double-flange remote liquid level meter into the air blowing liquid level meter on line, thereby continuously measuring the liquid level in the reaction kettle.
Optionally, as shown in fig. 3, the blowing liquid level meter further comprises a gas source 11, and the gas source 11 is communicated with the upper cavity in the reaction kettle and the transmitter body 21.
In the embodiment of the invention, the air source 11 is arranged in the blowing liquid level meter, so that not only can the steam or condensate in the reaction kettle be prevented from blocking the negative pressure side pressure leading pipe, but also the accuracy and the reliability of liquid level measurement can be improved by adjusting the air pressure.
Optionally, as shown in fig. 3, the negative pressure side pressure pipe includes a first negative pressure side pressure pipe 12 and a second negative pressure side pressure pipe 13, and the first negative pressure side pressure pipe 12 is used for communicating an upper cavity in the reaction kettle with the gas source 11; and the second negative side pressure guide pipe 13 is used for communicating the gas source 11 with the transmitter body 21.
In the embodiment of the invention, the negative pressure side pressure guiding pipe is designed into 2 sections, so that the installation of the pressure guiding pipe can be facilitated.
Optionally, as shown in fig. 3, the air blowing liquid level meter further includes a negative pressure side pressure leading interface 14; the first negative side pressure leading pipe 12, the second negative side pressure leading pipe 13 and the air source 11 are communicated through a negative side pressure leading interface 14, wherein the negative side pressure leading interface 14 is matched with the interfaces of the first negative side pressure leading pipe 12, the second negative side pressure leading pipe 13 and the air source 11.
In the embodiment of the invention, the first negative side pressure guiding pipe 12, the second negative side pressure guiding pipe 13 and the air source 11 can be quickly installed through the negative side pressure guiding interface 14.
Optionally, as shown in fig. 3, the reaction kettle includes a valve 15 and a first joint, the first joint may be a two-way joint or a three-way joint, the first joint in fig. 3 is a three-way joint 16, and one end of the first negative pressure pipe 12 is communicated with the three-way joint 16; the upper end of the three-way joint 16 can be connected with a pressure gauge, and the lower end is communicated with the upper cavity in the reaction kettle; the other end of the first negative side pressure leading pipe 12 is communicated with a negative side pressure leading interface 14; the valve 15 is used for controlling the connection or disconnection state between the upper cavity in the reaction kettle and the first negative pressure side pressure leading pipe 12.
In the embodiment of the invention, when the first negative side pressure guiding pipe 12 is installed, the first negative side pressure guiding pipe 12 and an upper cavity in the reaction kettle can be disconnected through the valve 15, so that the safety of installation personnel is ensured; when the first negative side pressure introduction pipe 12 is installed, the valve 15 may be opened.
Optionally, as shown in fig. 3, one end of the second negative pressure pipe 13 is communicated with the transmitter body 21 through a second joint 17, and the second joint 17 is matched with one end of the second negative pressure pipe 13 and the end of the negative pressure capillary 22. Fig. 4 is a partially enlarged schematic view of the position of the second joint 17 in fig. 3, wherein the left side of the second joint 17 is connected to one end of the second negative pressure pipe 13, and the right side of the second joint 17 is connected to the end of the negative pressure capillary 22 remaining in the transmitter body 21.
In the embodiment of the present invention, the second negative pressure side pressure introduction pipe and the transmitter body 21 can be quickly connected by the second joint 17.
Optionally, as shown in fig. 3, the insufflation level gauge further includes a pressure regulating valve 18, and the air source 11 is transmitted to the negative pressure side pressure leading interface 14 through the pressure regulating valve 18.
In the embodiment of the invention, the pressure regulating valve 18 is arranged, so that the worker can conveniently check the air pressure of the air source 11.
Based on the same technical concept as that of fig. 2, an embodiment of the present invention further provides a blowing level meter obtained by transforming a dual-flange remote transmission level meter, which is shown in fig. 3, wherein the dual-flange remote transmission level meter includes a positive pressure side flange 19, a positive pressure side capillary tube 20, a transmitter body 21, a negative pressure side capillary tube 22, a negative pressure side flange 23, a positive pressure side diaphragm and a negative pressure side diaphragm, the positive pressure side flange 19 is communicated with the transmitter body 21 through the positive pressure side capillary tube 20, and the negative pressure side flange 23 is communicated with the transmitter body 21 through the negative pressure side capillary tube 22; the blowing liquid level meter includes: pressure pipe is drawn to malleation side flange 19, malleation side capillary 20, malleation side diaphragm, changer body 21 and negative pressure side, and wherein, malleation side flange 19 is through malleation side capillary 20 and changer body 21 intercommunication, and upper portion cavity in the reation kettle draws pressure pipe and changer body 21 intercommunication through the negative pressure side, the level gauge of blowing is arranged in measuring the liquid level in the reation kettle.
Optionally, the blowing liquid level meter shown in fig. 3 further comprises a gas source 11, and the gas source 11 is communicated with the upper cavity in the reaction kettle and the transmitter body 21.
Optionally, the negative pressure side pressure pipe in the blowing liquid level meter shown in fig. 3 includes a first negative pressure side pressure pipe 12 and a second negative pressure side pressure pipe 13, and the first negative pressure side pressure pipe 12 is used for communicating an upper cavity in the reaction kettle with the gas source 11; and the second negative side pressure guide pipe 13 is used for communicating the gas source 11 with the transmitter body 21.
The principle of measuring the liquid level of the blowing level gauge shown in fig. 3 is as follows: assume that the pressure at the positive pressure side flange 19 is PLower partThe pressure at the pressure leading pipe at the negative pressure side is POn the upper partThen, the output pressure P of the transmitter body 21 becomes PLower part-POn the upper partAnd P isLower part＝P0+ρgH，POn the upper part＝P0So that P is ρ gH, then
Wherein, P0The pressure of the upper cavity in the partial reaction vessel is shown, ρ is the density of the liquid, g is the acceleration of gravity, and H is the height of the liquid.
The blowing liquid level meter obtained by transforming the double-flange remote transmission liquid level meter can transform the double-flange remote transmission liquid level meter with damaged parts such as a negative pressure side flange, a negative pressure side diaphragm or a negative pressure side capillary tube and the like on the negative pressure side into the blowing liquid level meter in the operation process of the reaction kettle, thereby continuously measuring the liquid level in the reaction kettle.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a method with two flange teletransmission level gauges reform transform into the level gauge of blowing, two flange teletransmission level gauges are used for surveing the liquid level in a reation kettle, two flange teletransmission level gauges include malleation side flange, malleation side diaphragm, malleation side capillary, changer body, negative pressure side capillary, negative pressure side diaphragm and negative pressure side flange, malleation side flange passes through malleation side capillary with changer body intercommunication, the negative pressure side flange passes through the negative pressure side capillary with changer body intercommunication, malleation side diaphragm install in the upper portion of malleation side flange, the negative pressure side diaphragm install in the lower part of negative pressure side flange, its characterized in that, the method includes:
disconnecting the negative pressure side capillary tube from the transmitter body;
the transmitter body is communicated with an upper cavity in the reaction kettle through a negative pressure side pressure leading pipe;
the positive pressure side flange, the positive pressure side diaphragm, the positive pressure side capillary tube, the transmitter body and the negative pressure side pressure leading tube form a blowing liquid level meter.
2. The method of retrofitting a dual flange remote level gauge into a blow level gauge of claim 1, further comprising a gas source in communication with the upper cavity in the reaction vessel and the transmitter body.
3. The method according to claim 2, wherein the negative pressure side pressure pipe comprises a first negative pressure pipe and a second negative pressure pipe, the first negative pressure pipe is used for communicating an upper cavity in the reaction kettle with the gas source;
and the second negative side pressure leading pipe is used for communicating the gas source with the transmitter body.
4. The method of retrofitting a dual-flange remote fluid level gauge into an insufflation fluid level gauge of claim 3 further comprising a negative pressure side pressure port;
the first negative side pressure leading pipe, the second negative side pressure leading pipe and the air source are communicated through the negative side pressure leading interface.
5. The method according to claim 4, wherein the reaction vessel comprises a valve and a first joint, one end of the first negative pressure pipe is communicated with the first joint, and the other end of the first negative pressure pipe is communicated with the negative pressure port;
the valve is used for controlling the connection or disconnection state between the upper cavity in the reaction kettle and the first negative pressure side pressure leading pipe.
6. The method of modifying a dual flange remote fluid level gauge into a blow fluid level gauge according to claim 5, wherein said first fitting is a two-way fitting or a three-way fitting.
7. The method of claim 6, wherein an end of the second negative side pressure pipe communicates with the transmitter body through a second joint, and the second joint matches with an end of the second negative side pressure pipe and a terminal end of the negative side capillary tube.
8. The method of claim 7, wherein the insufflation level gauge further comprises a pressure regulating valve through which the gas source is delivered to the negative pressure side pilot pressure port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600828.3A CN112179452B (en) | 2019-07-04 | 2019-07-04 | Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600828.3A CN112179452B (en) | 2019-07-04 | 2019-07-04 | Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112179452A true CN112179452A (en) | 2021-01-05 |
| CN112179452B CN112179452B (en) | 2022-10-14 |
Family
ID=73916003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910600828.3A Active CN112179452B (en) | 2019-07-04 | 2019-07-04 | Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112179452B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323222A1 (en) * | 1993-07-12 | 1995-04-27 | Miele & Cie | Method and device for displaying the degree of filling of the dust-filter bag in a vacuum cleaner. |
| US20060081046A1 (en) * | 2004-10-14 | 2006-04-20 | Maschinenfabrik Reinhausen Gmbh | Level gauge for oil-filled transformer, choke, or tap changer |
| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| CN104482986A (en) * | 2014-12-30 | 2015-04-01 | 瓮福（集团）有限责任公司 | Method for measuring liquid level of closed vessel |
| CN208254590U (en) * | 2018-06-12 | 2018-12-18 | 中国船舶重工集团公司第七一九研究所 | A kind of measuring system for stirring liquid level for ship water tank |
| CN208282897U (en) * | 2018-05-15 | 2018-12-25 | 上海孚凌自动化控制系统有限公司 | A kind of blowing type liquid level meter |
-
2019
- 2019-07-04 CN CN201910600828.3A patent/CN112179452B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323222A1 (en) * | 1993-07-12 | 1995-04-27 | Miele & Cie | Method and device for displaying the degree of filling of the dust-filter bag in a vacuum cleaner. |
| US20060081046A1 (en) * | 2004-10-14 | 2006-04-20 | Maschinenfabrik Reinhausen Gmbh | Level gauge for oil-filled transformer, choke, or tap changer |
| CN101206133A (en) * | 2007-12-14 | 2008-06-25 | 西安长庆科技工程有限责任公司 | Built-in pressure sampling method for differential pressure levelmeter |
| CN104482986A (en) * | 2014-12-30 | 2015-04-01 | 瓮福（集团）有限责任公司 | Method for measuring liquid level of closed vessel |
| CN208282897U (en) * | 2018-05-15 | 2018-12-25 | 上海孚凌自动化控制系统有限公司 | A kind of blowing type liquid level meter |
| CN208254590U (en) * | 2018-06-12 | 2018-12-18 | 中国船舶重工集团公司第七一九研究所 | A kind of measuring system for stirring liquid level for ship water tank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112179452B (en) | 2022-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101675322B (en) | For the Flangeless differential pressure transmitter of industrial process control system | |
| CN201514234U (en) | Multi-parameter differential pressure type flow testing device | |
| US20160187170A1 (en) | Variable line size averaging pitot tube | |
| CN111928910A (en) | Integral type bidirectional measurement return bend flowmeter | |
| CN112179452B (en) | Method for modifying double-flange remote transmission liquid level meter into blowing liquid level meter | |
| JP2017524148A (en) | Process measurement probe bottoming indicator | |
| CN204831400U (en) | Steady voltage formula low discharge wind speed amount of wind measuring device | |
| CN105135218A (en) | Fuel gas leakage alarm device | |
| CN210638744U (en) | Differential pressure flowmeter | |
| CN219495324U (en) | Bidirectional flow Pi Tuoer flowmeter | |
| CN206419198U (en) | The detection device of fire-fighting equipment | |
| CN212458421U (en) | Temperature and pressure integrated transmitter constant-temperature online calibration device | |
| CN202002680U (en) | Temperature-pressure compensation metal tube float flowmeter | |
| CN209783694U (en) | Differential pressure type liquid level transmitter | |
| CN203275023U (en) | Transformer vacuum measurement special-purpose tool | |
| CN106499619A (en) | The testing equipment of fire-fighting equipment | |
| CN203772325U (en) | Integral pore plate flowmeter | |
| CN103161976B (en) | Gas pressure regulating valve | |
| CN206192602U (en) | Volume of letting out missed measure equipment | |
| CN109556685B (en) | Buoy type liquid level transmitter calibration device and calibration method thereof | |
| CN112197832A (en) | Self-calibration combined type water level gauge | |
| CN218156321U (en) | Long-diameter nozzle flowmeter | |
| CN207180781U (en) | Live flow detector | |
| CN216081429U (en) | Air pressure compensation type static level gauge | |
| CN211954276U (en) | Integral type bidirectional measurement return bend flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |