CN212228163U - Liquid level measuring device - Google Patents
Liquid level measuring device Download PDFInfo
- Publication number
- CN212228163U CN212228163U CN202020649168.6U CN202020649168U CN212228163U CN 212228163 U CN212228163 U CN 212228163U CN 202020649168 U CN202020649168 U CN 202020649168U CN 212228163 U CN212228163 U CN 212228163U
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- Prior art keywords
- pipe
- liquid
- pressure
- measuring device
- level measuring
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Abstract
The embodiment of the utility model discloses liquid level measuring device, include: the pressure transmission pipe and a first pressure sensor are used for measuring the air pressure in the pressure transmission pipe; the first pressure sensor is hermetically connected with a pipe orifice at one end of the pressure conduction pipe, and the pipe orifice at the other end of the pressure conduction pipe is exposed to the bottom of liquid so as to enable part of the liquid to enter and seal gas in the pressure conduction pipe; the pressure conduction pipe contains a liquid substance therein to isolate the first pressure sensor from the liquid. The technical scheme of the utility model, through setting up liquid material, separate surveyed environment and sensor with liquid material to the gas corrosion harm sensor of being surveyed liquid volatility has been avoided.
Description
Technical Field
The embodiment of the utility model provides a relate to the level measurement technique, especially relate to a level measurement device.
Background
At present, when liquid level is measured, a vertical conduit is directly adopted to extend into liquid, and the height of the liquid level is calculated by measuring the air pressure in the conduit. However, some liquids are volatile and are easily volatilized to generate gas to corrode the sensor.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a liquid level measuring device to realize that the protection sensor avoids being corroded by volatile liquid.
An embodiment of the utility model provides a liquid level measuring device, include: the pressure transmission pipe and a first pressure sensor are used for measuring the air pressure in the pressure transmission pipe; the first pressure sensor is hermetically connected with a pipe orifice at one end of the pressure conduction pipe, and the pipe orifice at the other end of the pressure conduction pipe is exposed to the bottom of liquid so as to enable part of the liquid to enter and seal gas in the pressure conduction pipe; the pressure conduction pipe contains a liquid substance therein to isolate the first pressure sensor from the liquid.
Optionally, a second pressure sensor is further included for measuring atmospheric pressure.
Optionally, the pressure conduction pipe comprises a U-shaped pipe and a liquid inlet pipe, the first pressure sensor is hermetically connected to a pipe orifice at one end of the U-shaped pipe, the other end of the U-shaped pipe is communicated with one end of the liquid inlet pipe, and the other end of the liquid inlet pipe extends to the bottom of the liquid along the height direction of the liquid; the liquid substance is positioned at the bending part of the U-shaped pipe.
Optionally, the liquid inlet pipe further comprises a transverse pipe, and the transverse pipe is communicated with the other end of the liquid inlet pipe.
Optionally, the liquid inlet pipe is a straight pipe or an elbow pipe arranged in the vertical direction.
Optionally, the U-shaped bottom of the U-shaped tube is flush with the bottom wall of the liquid container.
Optionally, the U-shaped tube and the liquid inlet tube are connected through a connecting tube.
Optionally, the pressure conduction pipe includes an inverted pipe and a liquid inlet pipe, the first pressure sensor is connected to a pipe orifice at one end of the inverted pipe in a sealing manner at the lower part, the other end of the inverted pipe is connected to one end of the liquid inlet pipe in a through manner, and the other end of the liquid inlet pipe extends to the bottom of the liquid along the height direction of the liquid; the liquid substance is located above the first pressure sensor.
Optionally, the inverted pipe is a straight pipe or an elbow pipe arranged in the vertical direction.
Optionally, the liquid substance is an oil seal liquid.
The technical scheme of the utility model, through setting up liquid material, separate surveyed environment and sensor with liquid material to the gas corrosion harm sensor of being surveyed liquid volatility has been avoided.
Drawings
Fig. 1 is a schematic structural diagram of a liquid level measuring device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a liquid level measuring device according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a liquid level measuring device according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a liquid level measuring device according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a liquid level measuring device according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a liquid level measuring device according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a liquid level measuring device according to a second embodiment of the present invention.
Description of the main part symbols
Pressure conduction pipe 1
U-shaped tube 11
Connecting pipe 13
Inverted vertical pipe 15
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Fig. 1 is a schematic structural diagram of a liquid level measuring device according to an embodiment of the present invention. As shown in FIG. 1, the embodiment of the utility model provides a liquid level measuring device, include: a pressure conducting tube 1, a first pressure sensor 2 for measuring the gas pressure inside the tube of the pressure conducting tube 1 and a second pressure sensor (not indicated in the figure) for measuring the atmospheric pressure.
Wherein, the first pressure sensor 2 is hermetically connected with a nozzle at one end of the pressure conduction pipe 1, and a nozzle at the other end of the pressure conduction pipe 1 is exposed at the bottom of the liquid 3, so that part of the liquid 3 enters and seals the gas in the pressure conduction pipe 1.
The first pressure sensor 2 and the second pressure sensor may be one differential pressure sensor for measuring the difference between the internal gas pressure and the atmospheric pressure of the pressure conducting tube 1. The first pressure sensor 2 and the second pressure sensor may also be two absolute pressure sensors, the pressure sensing surface of the first pressure sensor 2 is located inside the pipe of the pressure conducting pipe 1 for measuring the pressure inside the pipe of the pressure conducting pipe 1, and the pressure sensing surface of the second pressure sensor is located in the outside air for measuring the atmospheric pressure. It can be understood, if the utility model discloses a liquid level measurement device is used for fixed height above sea level also can omit second pressure sensor, only need input when measuring at every turn in advance the measuring atmospheric pressure value can, do not need repeated measurement.
The utility model discloses a level measurement device is used for stretching into liquid 3, measures the height of liquid level 3. When the liquid 3 contacts the nozzle of the pressure conduction pipe 1, the liquid 3 enters the pressure conduction pipe 1 due to the surface tension of the liquid 3, and a closed air bag structure is formed in the pipeline. At this time, the pressure in the pressure conduction pipe 1 is equal to the atmospheric pressure outside plus the pressure generated by the liquid level.
The difference between the air pressure in the pipe and the external atmospheric pressure measured by the pressure sensor is the pressure generated by the liquid level. The height of the liquid level can be simply obtained according to the following physical formula:
H＝P/(ρ*g)
wherein, H is the depth of the pressure conduction pipe 1 extending into the liquid 3, P is the pressure generated when the liquid 3 enters the pressure conduction pipe 1, rho is the density of the liquid 3, and g is the gravity acceleration.
In the embodiment of the present invention, the liquid material 4 is accommodated inside the pressure conduction pipe 1, and the first pressure sensor 2 is isolated from the liquid 3. The liquid 4 is a non-volatile stable liquid, such as oil seal, mercury, etc., and the present invention is not limited thereto. By arranging the liquid substance 4, the measured environment and the sensor are separated by the liquid substance 4, so that the sensor is prevented from being corroded and damaged by the volatilized gas of the measured liquid. The following describes, by way of example, how the liquid substance 4 is accommodated in the pressure-conducting tube 1, such that the liquid substance 4 isolates the first pressure sensor 2 from the liquid 3. It will be understood that how to contain the liquid substance 4 in the pressure conduction tube 1 is not limited to the particular embodiments described herein, but that various obvious changes, adaptations and substitutions may be made by those skilled in the art without departing from the scope of the present invention. Therefore, although the following embodiments are used to describe in more detail how to accommodate the liquid substance 4 in the pressure conduction pipe 1, the present invention is not limited to the following embodiments, and many other equivalent embodiments may be included without departing from the spirit of the present invention.
In the embodiment of the present invention, as shown in fig. 1, the pressure conduction pipe 1 includes a U-shaped pipe 11 and an inlet pipe 12, the first pressure sensor 2 is hermetically connected to a pipe orifice of one end of the U-shaped pipe 11, the other end of the U-shaped pipe 11 is connected to one end of the inlet pipe 12 in a through manner, and the other end of the inlet pipe 12 extends to the bottom of the liquid along the height direction of the liquid; the U-shaped pipe 11 and the liquid inlet pipe 12 are connected through a connecting pipe 13. The liquid substance 4 is located the kink of U type pipe 11, and wherein, liquid substance 4 is the stable liquid of non-volatile, such as oil-sealed liquid, mercury etc. this the utility model discloses do not limit to this. The liquid substance 4 divides the gas of the U-tube 11 into two parts. The liquid substance 4 divides the gas in the pipe (between the first pressure sensor 2 and the liquid substance 4) and the gas between the liquid to be detected (between the liquid to be detected and the liquid substance 4), so that the corrosion gas generated by the volatilization of the liquid to be detected is prevented from directly contacting the surface of the sensor to damage the sensor, the requirement on the corrosion resistance of the sensor is greatly reduced, and the service life of the sensor is prolonged. In addition, the pressure test tiny error caused by the liquid substance can be removed by adding a correction factor into the software.
Optionally, the U-shaped bottom of the U-shaped tube 11 is flush with the bottom wall of the liquid container.
As an optional embodiment, the pressure conduction pipe 1 of the present invention further includes a transverse pipe 14, the transverse pipe 14 is connected to the other end of the liquid inlet pipe 12 in a penetrating manner, the other end of the liquid inlet pipe 12 is one end extending to the bottom of the liquid along the height direction of the liquid, and the liquid inlet pipe 12 may extend into the liquid (as shown in fig. 2) or may not extend into the liquid (as shown in fig. 3). Is exposed to the bottom of the liquid 3 by the mouth of the transverse pipe 14 so that part of the liquid enters and seals the gas inside the pressure conducting pipe 1. The connecting angle between the liquid inlet pipe 12 and the transverse pipe 14 is 90 degrees, and an L-shaped structure is formed. It is understood that the connection angle between the liquid inlet pipe 12 and the transverse pipe 14 is not limited to 90 degrees, but may be 89 degrees, 92 degrees, 80 degrees, etc., and the present invention is not limited thereto. By arranging the transverse pipe 14 along the bottom of the liquid, when the liquid level is measured, the liquid does not climb longitudinally in the pipe to generate reverse pressure, and the measurement error is reduced.
The length, thickness, material and shape of the pressure conduction pipe 1 can be designed and adjusted according to practical application, and the utility model discloses do not limit to this. The utility model discloses a U type pipe 11's shape is not restricted to the U type, can warp to V type (as shown in fig. 4), semicircle type (as shown in fig. 5) and so on multiple shape according to actual conditions, as long as can guarantee that liquid material 4 can not flow to in being surveyed the liquid can, the utility model discloses a "U type pipe" is only a name, and the explanation scope is not merely the pipe that only indicates ordinary U type. The liquid inlet pipe 12, the connecting pipe 13 and the transverse pipe 14 can be straight pipes or bent pipes, and the shape of the bent pipes can be set to be various, such as S-shaped, and the utility model is not limited to the above. The bent pipe is arranged, so that the air capacity in the pressure conduction pipe 1 can be increased, the measurement range is larger, or the measurement precision is more accurate.
The technical scheme of the utility model, through setting up liquid material, separate surveyed environment and sensor with liquid material to the gas corrosion harm sensor of being surveyed liquid volatility has been avoided.
Example two
Fig. 6 is a schematic structural diagram of a liquid level measuring device provided by the second embodiment of the present invention. As shown in fig. 6, the pressure conduction pipe 1 includes an inverted pipe 15 and a liquid inlet pipe 12, the first pressure sensor 2 is connected to a nozzle of one end of the inverted pipe 15 at a lower portion in a sealing manner, the other end of the inverted pipe 15 is connected to one end of the liquid inlet pipe 12 in a penetrating manner, and the other end of the liquid inlet pipe 12 extends to a bottom of the liquid along a height direction of the liquid; the inverted pipe 15 is connected to the liquid inlet pipe 12 through a connecting pipe 13. The liquid substance 4 is located above the first pressure sensor 2, wherein the liquid substance 4 is a non-volatile stable liquid, and has no damage to the sensor, such as oil seal liquid, mercury, etc., and the utility model discloses do not limit to this. The liquid substance 4 isolates the sensor from the measured liquid, and the measured liquid is prevented from volatilizing and corroding to damage the sensor.
As an alternative embodiment, as shown in fig. 7, the pressure conduction pipe 1 of the present invention further includes a horizontal pipe 14, the horizontal pipe 14 is connected to the other end of the liquid inlet pipe 12, and the other end of the liquid inlet pipe 12 is one end extending to the bottom of the liquid along the height direction of the liquid. Is exposed to the bottom of the liquid 3 by the mouth of the transverse pipe 14 so that part of the liquid enters and seals the gas inside the pressure conducting pipe 1. The connecting angle between the liquid inlet pipe 12 and the transverse pipe 14 is 90 degrees, and an L-shaped structure is formed. It is understood that the connection angle between the liquid inlet pipe 12 and the transverse pipe 14 is not limited to 90 degrees, but may be 89 degrees, 92 degrees, 80 degrees, etc., and the present invention is not limited thereto. By arranging the transverse pipe 14 along the bottom of the liquid, when the liquid level is measured, the liquid does not climb longitudinally in the pipe to generate reverse pressure, and the measurement error is reduced.
The length, thickness, material and shape of the pressure conduction pipe 1 can be designed and adjusted according to practical application, and the utility model discloses do not limit to this. The inverted pipe 15, the liquid inlet pipe 12, the connecting pipe 13 and the transverse pipe 14 are straight pipes or bent pipes, and the shape of the bent pipe can be set into various shapes, such as S-shaped, and the utility model discloses do not limit this. The bent pipe is arranged, so that the air capacity in the pressure conduction pipe 1 can be increased, the measurement range is larger, or the measurement precision is more accurate.
The technical scheme of the utility model, through setting up liquid material, separate surveyed environment and sensor with liquid material to the gas corrosion harm sensor of being surveyed liquid volatility has been avoided.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (8)
1. A liquid level measuring device, comprising: the pressure transmission pipe and a first pressure sensor are used for measuring the air pressure in the pressure transmission pipe; the first pressure sensor is hermetically connected with a pipe orifice at one end of the pressure conduction pipe, and the pipe orifice at the other end of the pressure conduction pipe is exposed to the bottom of liquid so as to enable part of the liquid to enter and seal gas in the pressure conduction pipe; a liquid substance is accommodated in the pressure conduction pipe to isolate the first pressure sensor from the liquid;
the pressure conduction pipe comprises a U-shaped pipe and a liquid inlet pipe, the first pressure sensor is connected with a pipe orifice at one end of the U-shaped pipe in a sealing mode, the other end of the U-shaped pipe is connected with one end of the liquid inlet pipe in a penetrating mode, and the other end of the liquid inlet pipe extends to the bottom of liquid along the height direction of the liquid; the liquid substance is positioned at the bent part of the U-shaped pipe;
the liquid level measuring device further comprises a transverse pipe, and the transverse pipe is communicated with the other end of the liquid inlet pipe.
2. The fluid level measuring device of claim 1, further comprising a second pressure sensor for measuring atmospheric pressure.
3. The fluid level measuring device of claim 1, wherein the inlet tube is a straight tube or a bent tube arranged in a vertical direction.
4. The liquid level measuring device of claim 1, wherein the U-shaped bottom of the U-shaped tube is flush with the bottom wall of the liquid container.
5. The liquid level measuring device of claim 1, wherein the U-shaped pipe and the liquid inlet pipe are connected through a connecting pipe.
6. The liquid level measuring device of claim 1, wherein the pressure conducting pipe comprises a stand pipe and a liquid inlet pipe, the first pressure sensor is connected with a nozzle of one end of the stand pipe in a sealing way at the lower part, the other end of the stand pipe is connected with one end of the liquid inlet pipe in a penetrating way, and the other end of the liquid inlet pipe extends to the bottom of the liquid along the height direction of the liquid; the liquid substance is located above the first pressure sensor.
7. The fluid level measuring device of claim 6, wherein the inverted pipe is a straight pipe or a bent pipe arranged in a vertical direction.
8. The fluid level measuring device of claim 1, wherein the liquid substance is an oil seal liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020649168.6U CN212228163U (en) | 2020-04-26 | 2020-04-26 | Liquid level measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020649168.6U CN212228163U (en) | 2020-04-26 | 2020-04-26 | Liquid level measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212228163U true CN212228163U (en) | 2020-12-25 |
Family
ID=73908526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020649168.6U Expired - Fee Related CN212228163U (en) | 2020-04-26 | 2020-04-26 | Liquid level measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212228163U (en) |
-
2020
- 2020-04-26 CN CN202020649168.6U patent/CN212228163U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |