CN111289168A - Pressure measuring device and liquid level measuring instrument - Google Patents
Pressure measuring device and liquid level measuring instrument Download PDFInfo
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- CN111289168A CN111289168A CN202010261155.6A CN202010261155A CN111289168A CN 111289168 A CN111289168 A CN 111289168A CN 202010261155 A CN202010261155 A CN 202010261155A CN 111289168 A CN111289168 A CN 111289168A
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- measuring device
- pressure sensor
- accommodating cavity
- fluid pressure
- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a fluid pressure measuring device and a liquid level measuring instrument, and belongs to the technical field of pressure and liquid level measurement. The fluid pressure measuring device comprises a shell, a first joint component, a second joint component and a pressure sensor, wherein an accommodating cavity for accommodating gas is formed in the shell; one end of the first joint component is communicated with the accommodating cavity, and the other end of the first joint component is communicated with an external air source and can charge compressed air into the accommodating cavity; one end of the second joint component is communicated with the accommodating cavity, and the other end of the second joint component is communicated with the fluid to be measured; the pressure sensor is arranged in the containing cavity in a sealing mode and used for measuring the pressure of compressed air in the containing cavity. The liquid level measuring instrument comprises the fluid pressure measuring device. The fluid pressure measuring device and the liquid level measuring instrument have the advantages of high integration level, convenience in assembly, high reliability and wide application range.
Description
Technical Field
The invention relates to the technical field of pressure and liquid level measurement, in particular to a pressure measuring device and a liquid level measuring instrument.
Background
Fluid pressure signal measurement is a very common measurement technical means, and the traditional pressure measurement device mainly has two modes of an absolute pressure mode and a differential pressure mode. The absolute pressure obtained by the absolute pressure type measurement mode is the sum of the pressure of the fluid to be measured and the atmospheric pressure of the surrounding environment, the atmospheric pressure is not a constant value, and the absolute pressure is easily influenced by various factors such as the atmospheric pressure in different regions and different time periods, and the measurement precision is low.
The existing differential pressure type measuring mode needs to put a measuring device into fluid to be measured, and the measuring device has higher requirement on environment. For example, if gas in the gas environment to be tested is corrosive, the testing device is easily corroded, and the testing precision is affected; or more suspended matters exist in the liquid environment to be tested, the suspended matters, microorganisms and the like can be attached to the surface of the testing device, so that the clogging of the testing device is caused, the measurement precision and the sensitivity are greatly reduced, and the use of the testing device is influenced.
The existing non-contact measuring device, such as a bubble type water level measuring instrument, is characterized in that an air pipe is directly arranged on a pressure sensor, the air pipe is put into water to be measured for pressure intensity detection, and water vapor can contact the pressure sensor through the air pipe, so that the water resistance is poor, and the service life of the pressure sensor is influenced; generally, a stainless steel air duct or a plastic air duct interface is adhered to a pressure sensor through glue, an air duct is connected and inserted on the stainless steel or plastic air duct interface, force is required to be applied properly in the inserting process, otherwise the stainless steel or plastic air duct interface is easy to fall off, and the assembly is inconvenient.
Disclosure of Invention
The invention aims to provide a pressure measuring device which is simple and compact in structure, high in integration level, convenient to assemble, high in reliability and suitable for various measuring environments.
In order to realize the purpose, the invention adopts the following technical scheme:
a pressure measurement device, comprising:
the shell is internally provided with an accommodating cavity for accommodating gas;
one end of the first joint component is communicated with the accommodating cavity, and the other end of the first joint component is communicated with an external air source and can charge compressed air into the accommodating cavity;
one end of the second joint component is communicated with the accommodating cavity, and the other end of the second joint component is communicated with the fluid to be measured;
and the pressure sensor is hermetically arranged in the accommodating cavity and used for measuring the pressure of the compressed air in the accommodating cavity.
Optionally, a temperature sensor is further installed in the accommodating cavity.
Optionally, the shell is further provided with an opening communicated with the accommodating cavity, and the pressure sensor is arranged on the opening through pouring sealant.
Optionally, the pressure sensor comprises a gauge pressure sensor body and a waterproof air duct connected to the gauge pressure sensor body, the other end of the waterproof air duct extends out of the pouring sealant, and a waterproof air-permeable plug is installed in the waterproof air duct.
Optionally, a locking member is provided between the pressure sensor and the housing, the locking member being for locking the pressure sensor.
Optionally, the pressure measuring device includes a one-way valve connected to the first connector assembly for one-way inflation of external compressed air into the receiving chamber.
Optionally, the check valve is disposed in the accommodating cavity, and the check valve is disposed in a sealing manner with the accommodating cavity.
Optionally, the first connector assembly comprises a first conduit connector attached to the housing and a first lock nut attached to the first conduit connector; and/or
The second connector assembly includes a second conduit connector attached to the housing and a second lock nut attached to the second conduit connector.
Optionally, the first joint assembly is sealingly connected to the housing; and/or the second joint assembly is sealingly connected to the housing.
Another object of the present invention is to provide a liquid level measuring instrument with high reliability and low cost.
In order to realize the purpose, the invention adopts the following technical scheme:
a liquid level measuring instrument comprises the pressure measuring device.
The invention has the beneficial effects that:
according to the pressure measuring device provided by the invention, when the liquid level is measured, the second joint component is communicated with the fluid to be measured, compressed air is filled into the accommodating cavity through the first joint component, the fluid to be measured is prevented from entering the accommodating cavity until the fluid to be measured does not enter the second joint component, and meanwhile, the compressed air does not overflow the second joint component. The fluid to be measured is isolated from the pressure sensor through compressed air, non-contact measurement is realized, the pressure sensor is prevented from directly contacting the fluid to be measured to influence the use of the pressure sensor, the reliability and the service life of the pressure sensor are improved, and the use cost is reduced; through the fluid that awaits measuring of second joint Assembly contact, can use the second joint Assembly of different materials according to the service environment of difference, can be applicable to the measurement of pressure under the different environment, application scope is wide.
According to the liquid level measuring instrument, the pressure measuring device is adopted, the liquid level is tested by data conversion, the measuring precision is high, the stability is high, the reliability is high, and the use cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a pressure measurement device according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of fig. 1.
In the figure:
1-a shell; 11-a containment chamber; 12-an opening; 2-a pressure sensor; 21-gauge pressure sensor body; 22-waterproof gas-guide tube; 3-a first joint assembly; 31-a first conduit fitting; 32-a first lock nut; 4-a second joint assembly; 41-a second conduit fitting; 42-a second lock nut; 5-a one-way valve; 6-a first seal; 7-a second seal; 8-a third seal; 9-pouring sealant; 10-a locking member; 20-outgoing cables.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The embodiment provides a fluid pressure measuring device, which can be applied to industrial measurement, such as pressure measurement of accumulated water in dispensing cans, overpass tunnels and the like, further calculates water level based on the pressure, and is applied to the fields of coffee machines and other electrical products. As shown in fig. 1, the fluid pressure measuring apparatus includes a housing 1 and a first joint assembly 3 and a second joint assembly 4 coupled to the housing 1. Specifically, as shown in fig. 2, an accommodating cavity 11 for accommodating gas is formed in the housing 1, the accommodating cavity 11 is internally provided with the pressure sensor 2 in a sealing manner, one end of the first joint assembly 3 is communicated with the accommodating cavity 11, the other end of the first joint assembly is communicated with an external gas source, and compressed air can be filled into the accommodating cavity 11; one end of the second joint component 4 is communicated with the accommodating cavity 11, and the other end is communicated with the fluid to be measured; the pressure sensor 2 is used to measure the pressure of the compressed air in the accommodating chamber 11.
When the pressure intensity of the fluid is measured, the second joint component 4 is communicated with the fluid to be measured, compressed air is filled into the accommodating cavity 11 through the first joint component 3, the fluid to be measured is prevented from entering the accommodating cavity until the liquid to be measured does not enter the second joint component 4, meanwhile, the compressed air does not overflow the second joint component 4, at the moment, the pressure intensity of the fluid to be measured is equal to the pressure intensity of the compressed air in the accommodating cavity, and the pressure sensor measures the pressure intensity of the compressed air in the accommodating cavity, so that the pressure intensity of the fluid to be measured can be obtained. The fluid to be measured is isolated from the pressure sensor through compressed air, non-contact measurement is realized, the pressure sensor is prevented from directly contacting the fluid to be measured to influence the use of the pressure sensor, the reliability and the service life of the pressure sensor are improved, and the use cost is reduced; through the fluid that awaits measuring of second joint Assembly 4 contact, can use the second joint Assembly of different materials according to the service environment of difference, can be applicable to the measurement of pressure under the different environment, application scope is wide.
Optionally, still set up on casing 1 with hold opening 12 that chamber 11 communicates, pressure sensor 2 sets up on opening 12, the installation and the measurement of pressure sensor 2 of being convenient for, pressure sensor 2 sets up on opening 12 through casting glue 9, makes pressure sensor 2 seal installation in casing 1, avoids receiving external environment's steam to destroy and influence life.
Further optionally, a locking member 10 is disposed between the pressure sensor 2 and the housing 1, and the locking member 10 is used for locking the pressure sensor 2, so that the pressure sensor 2 is fixed on the housing 1, and the structure is stable and the reliability is high. In this embodiment, the pressure sensor 2 and the locking member 10 are both disposed in the housing 1 through the potting adhesive 9, and optionally, the housing 1 is made of a stainless steel material or an engineering plastic material.
Alternatively, the pressure sensor 2 may be any one of an absolute pressure sensor, a gauge pressure sensor, or a differential pressure sensor, and may implement pressure measurement of the compressed air in the accommodating chamber 11; in the embodiment, the pressure sensor 2 adopts a gauge pressure sensor, and the gauge pressure sensor can eliminate the influence caused by atmospheric pressure change in different regions and different time periods and eliminate the influence caused by atmospheric pressure change in different regions and different time periods, so that the pressure measurement data is more accurate and reliable; optionally, the gauge pressure sensor comprises a gauge pressure sensor body 21 and a waterproof air duct 22 connected to the gauge pressure sensor body 21, and the other end of the waterproof air duct 22 extends out of the potting adhesive 9; when the gauge pressure sensor is used for a long time, the inside may enter steam, the waterproof air duct 22 timely discharges the steam on the gauge pressure sensor body 21 to the outside, and meanwhile, the waterproof ventilation plug is arranged in the waterproof air duct 22, and the steam is prevented from entering the gauge pressure sensor body 21 through the waterproof air duct 22.
Optionally, the pressure measuring device includes a check valve 5 connected to the first joint component 3, so that external compressed air can be filled into the accommodating cavity 11, and the gas in the accommodating cavity 11 is blocked from overflowing from the first joint component 3, thereby avoiding leakage of the compressed air and improving accuracy of the pressure test. In addition, the one-way valve 5 is arranged, so that compressed air can be stably filled into the accommodating cavity 11, and the impact on the pressure sensor is avoided. Optionally, the check valve 5 can be installed in the accommodating cavity 11, so that the integration of the pressure measuring device can be improved; alternatively, the check valve 5 may also be mounted outside the housing 1, facilitating the mounting of the check valve 5. In this embodiment, two check valves 5 are installed in the housing 1, so that the use reliability is improved, and the maintenance is reduced. In order to improve reliability and reduce maintenance, a plurality of check valves 5 may be installed in other embodiments.
Optionally, the one-way valve 5 is sealingly connected to the receiving chamber 11. Optionally, the one-way valve 5 is connected to the housing 1 by a third seal 8. As shown in fig. 2, in this embodiment, the third sealing element 8 is a sealing ring, and the sealing ring is installed between the periphery of the check valve 5 and the inner hole of the accommodating cavity 11, so that the check valve 5 and the accommodating cavity 11 are sealed, and the influence of air leakage on the measurement effect is avoided.
In an alternative embodiment, the first connector assembly 3 comprises a first conduit connector 31 attached to the housing 1 and a first lock nut 32 attached to the first conduit connector 31; and/or the second connector assembly 4 comprises a second conduit connector 41 attached to the housing 1 and a second lock nut 42 attached to the second conduit connector 41. The first conduit connector 31 and the second conduit connector 41 are each screwed to the housing 1. Optionally, sealing connection is performed through a sealant or a hydraulic adhesive tape, air leakage is prevented, and measurement accuracy is improved. In an alternative embodiment, the air tube is installed through the first conduit connector 31, the air pump fills compressed air into the accommodating cavity 11 through the air tube, and the first locking nut 32 locks the air tube on the first conduit connector 31, so that the influence of instable installation of the air tube on use is avoided. In a similar way, the second pipe joint 41 is provided with an air pipe, the air pipe is put into the liquid of the fluid to be measured, and the second lock nut 42 locks the air pipe on the second pipe joint 41, so that the air pipe and the second pipe joint 41 are stably installed, and the use reliability is improved. Further optionally, the first joint component 3 and the second joint component 4 have the same specification and size, and can be replaced with each other, so that the assembly convenience is improved.
Optionally, the first joint assembly 3 is sealingly connected to the housing 1. Optionally, the first joint assembly 3 is connected to the housing 1 by a first seal 6. As shown in fig. 2, in the present embodiment, the first sealing member 6 is a sealing ring, a groove is provided on the first conduit joint 31, and the sealing ring is mounted in the groove and the other end of the sealing ring abuts against the housing 1, so that the first conduit joint 31 and the housing 1 are sealed.
Optionally, the second joint assembly 4 is sealingly connected to the housing 1. The second joint assembly 4 is connected to the housing 1 by a second seal 7. As shown in fig. 2, in the present embodiment, the second sealing element 7 is a sealing ring, and similarly, a groove is formed on the second conduit joint 41, the sealing ring is installed in the groove, and the other end of the sealing ring abuts against the housing 1, so that the second conduit joint 41 and the housing 1 are sealed. Alternatively, the first seal 6 and the second seal 7 may be used interchangeably as the first joint assembly 3 and the second joint assembly 4 are used interchangeably.
The embodiment also provides a liquid level measuring instrument, which comprises the pressure measuring device, a measuring air chamber which is arranged on the second joint component 4 and is communicated with the liquid to be measured, an air source component which is communicated with the first joint component 3, and an output cable 20 which is electrically connected with the pressure sensor 2 and is used for transmitting the measured data to the outside.
During testing, the measuring air chamber is put into liquid to be tested, compressed air is supplemented into the accommodating cavity 11 through the first connector, the pressure sensor 2 measures the pressure of the compressed air in the accommodating cavity 11, and measured data are processed through data conversion, so that corresponding water level height data can be obtained.
Optionally, a temperature sensor is further installed in the accommodating cavity 11 to obtain the pressure of the fluid to be measured at different temperatures. Optionally, the temperature sensor is electrically connected to the output cable 20, and performs data compensation processing through a temperature compensation algorithm, so as to improve the test accuracy. Optionally, the pressure sensor 2 and the temperature sensor are electrically connected to the same circuit board, and during measurement, the temperature sensor and the pressure sensor 2 both transmit data to the outside, and perform compensation processing on the measurement result of the pressure sensor 2 according to different temperatures, so that pressure data compensation and calibration in different temperature environments are realized, consistency and reliability of pressure measurement data are ensured, and the measurement result is more accurate. Optionally, the output cable 20 is a 4pin signal cable with terminal connections for transmitting the pressure signal and the temperature signal.
Optionally, the pressure measuring device further comprises a power supply module for providing a dc regulated power supply for the pressure sensor 2 and the temperature sensor, and realizing overvoltage, overcurrent or overheat protection; optionally, the pressure measuring device further includes a data processing module, which processes and decodes the pressure signal measured by the pressure sensor 2, in this embodiment, the temperature signal detected by the temperature sensor is subjected to data compensation processing by a temperature compensation algorithm; optionally, the pressure measuring device further comprises a data transmission module for latching the data processed by the data processing module and supporting a third-party device or an upper computer software instruction query function; the output signal may be in the form of a wired signal, and may be in the form of any UART signal such as IIC/232/485.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fluid pressure measurement device, comprising:
the gas-filled compressor comprises a shell (1), wherein an accommodating cavity (11) for accommodating gas is formed in the shell;
one end of the first joint component (3) is communicated with the accommodating cavity (11), the other end of the first joint component is communicated with an external air source, and compressed air can be filled into the accommodating cavity (11);
a second joint component (4), one end of which is communicated with the containing cavity (11), and the other end of which is communicated with the fluid to be measured;
the pressure sensor (2) is arranged in the accommodating cavity (11) in a sealing mode and used for measuring the pressure of the compressed air in the accommodating cavity (11).
2. Fluid pressure measuring device according to claim 1, characterized in that a temperature sensor is also mounted in the receiving chamber (11).
3. The fluid pressure measuring device according to claim 1, wherein the housing (1) further has an opening (12) communicating with the accommodating chamber (11), and the pressure sensor (2) is disposed on the opening (12) through a potting adhesive (9).
4. The fluid pressure measuring device according to claim 3, wherein the pressure sensor (2) comprises a gauge pressure sensor body (21) and a waterproof air duct (22) connected to the gauge pressure sensor body (21), the other end of the waterproof air duct (22) extends out of the potting adhesive (9), and a waterproof air-permeable plug is installed in the waterproof air duct (22).
5. Fluid pressure measuring device according to claim 1, characterized in that a locking member (10) is arranged between the pressure sensor (2) and the housing (1), which locking member (10) is adapted to lock the pressure sensor (2).
6. Fluid pressure measuring device according to claim 1, characterized in that the pressure measuring device comprises a one-way valve (5) connected to the first joint assembly (3) for one-way charging of external compressed air into the receiving chamber (11).
7. Fluid pressure measuring device according to claim 6, characterized in that the non return valve (5) is arranged in the receiving chamber (11) and that the non return valve (5) is arranged sealed to the receiving chamber (11).
8. Fluid pressure measurement device according to any of claims 1-7,
the first connector assembly (3) comprises a first conduit connector (31) connected to the housing (1) and a first lock nut (32) connected to the first conduit connector (31); and/or
The second connector assembly (4) comprises a second conduit connector (41) connected to the housing (1) and a second lock nut (42) connected to the second conduit connector (41).
9. Fluid pressure measuring device according to any of claims 1-7, wherein the first joint assembly (3) is sealingly connected to the housing (1); and/or the second joint component (4) is connected with the shell (1) in a sealing way.
10. A liquid level gauge comprising a fluid pressure measuring device according to any one of claims 1 to 9.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261155.6A CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
| CN202010583797.8A CN111537134A (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
| CN202021186687.XU CN212275130U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202021190508.XU CN212513441U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202021190548.4U CN212158908U (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261155.6A CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111289168A true CN111289168A (en) | 2020-06-16 |
Family
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Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010261155.6A Withdrawn CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
| CN202021186687.XU Active CN212275130U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202021190508.XU Active CN212513441U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202010583797.8A Pending CN111537134A (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
| CN202021190548.4U Active CN212158908U (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021186687.XU Active CN212275130U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202021190508.XU Active CN212513441U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202010583797.8A Pending CN111537134A (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
| CN202021190548.4U Active CN212158908U (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN111289168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747791A (en) * | 2020-12-29 | 2021-05-04 | 陈欣彦 | Steam pressure and water level integrated measuring mechanism of horizontal industrial boiler |
-
2020
- 2020-04-03 CN CN202010261155.6A patent/CN111289168A/en not_active Withdrawn
- 2020-06-23 CN CN202021186687.XU patent/CN212275130U/en active Active
- 2020-06-23 CN CN202021190508.XU patent/CN212513441U/en active Active
- 2020-06-23 CN CN202010583797.8A patent/CN111537134A/en active Pending
- 2020-06-23 CN CN202021190548.4U patent/CN212158908U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747791A (en) * | 2020-12-29 | 2021-05-04 | 陈欣彦 | Steam pressure and water level integrated measuring mechanism of horizontal industrial boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN212513441U (en) | 2021-02-09 |
| CN212158908U (en) | 2020-12-15 |
| CN111537134A (en) | 2020-08-14 |
| CN212275130U (en) | 2021-01-01 |
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Application publication date: 20200616 |