CN218349583U - Differential pressure type liquid level meter and differential pressure type liquid level measuring system - Google Patents
Differential pressure type liquid level meter and differential pressure type liquid level measuring system Download PDFInfo
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- CN218349583U CN218349583U CN202222310677.8U CN202222310677U CN218349583U CN 218349583 U CN218349583 U CN 218349583U CN 202222310677 U CN202222310677 U CN 202222310677U CN 218349583 U CN218349583 U CN 218349583U
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Abstract
The utility model provides a differential pressure formula level gauge, differential pressure formula level measurement system relates to liquid level measurement device technical field. The pressure-difference sampling device comprises a differential pressure transmitter, and a low-pressure side sampling pipe and a high-pressure side sampling pipe which are respectively connected with the differential pressure transmitter. The ends, far away from the differential pressure transmitter, of the low-pressure side sampling pipe and the high-pressure side sampling pipe are both connected with a device to be tested, and the connection position of the high-pressure side sampling pipe is higher than that of the low-pressure side sampling pipe; the high-pressure side sampling pipe is also provided with a high-pressure flushing three-way valve and a high-pressure sewage three-way valve. Through set up the high pressure and wash the three-way valve on the high pressure side sampling pipe, can introduce liquid from the external world and wash the high pressure side sampling pipe, avoided the high pressure side sampling pipe to block up, can discharge through high pressure blowdown three-way valve after the cleanness finishes. And after the cleaning is finished, liquid is continuously injected into the high-pressure side sampling pipe from the high-pressure flushing three-way valve, so that a liquid column with a certain height exists in the high-pressure side sampling pipe, and the liquid level height detection accuracy of the device to be detected is ensured.
Description
Technical Field
The utility model relates to a liquid level measurement technical field particularly, relates to a differential pressure type level gauge, differential pressure type liquid level measurement system.
Background
The differential pressure type liquid level meter is characterized in that the low-pressure side is connected with the bottom of the device to be tested and the high-pressure side is connected with the upper part of the device to be tested through a sampling tube. When the device to be tested is in normal operation, the high-pressure side pipeline is filled with condensed water, when the liquid level in the device to be tested rises, the low-pressure side pressure gradually increases, and the differential pressure becomes small. By reading the measured value of the differential pressure transmitter, the liquid level can be measured.
Because the accurate prerequisite that detects of differential pressure level gauge is that the high-pressure side pipeline is full of the comdenstion water, consequently, in the actual production process, because reasons such as pipeline washing, blowdown, when emptying the comdenstion water evacuation of high-pressure side, the measured value of differential pressure level gauge will be out of alignment. In addition, in order to prevent the influence of the external temperature, an insulating layer is generally required to be coated on the surface of the sampling pipeline, and once condensed water is emptied, the pipeline cannot be refilled in a short time only through natural condensation. Therefore, once the condensed water is drained, the differential pressure type liquid level meter cannot accurately measure for a long time. And in order to guarantee measurement accuracy, avoid the comdenstion water to discharge, and not wash the blowdown to the sample pipeline and again lead to the sample pipeline to block up, further influence measurement accuracy.
In view of this, the utility model is especially provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a differential pressure formula level gauge, differential pressure formula level measurement system, it is convenient that it has clean sampling tube, prevents that the sampling tube from blockking up, and the effect of liquid level detection precision has been guaranteed to timely fluid infusion.
The embodiment of the utility model is realized like this:
in a first aspect, the present invention provides a differential pressure type liquid level meter, comprising a differential pressure transmitter, and a low pressure side sampling pipe and a high pressure side sampling pipe respectively connected to the differential pressure transmitter;
the low-pressure side sampling pipe and one end of the high-pressure side sampling pipe, which are far away from the differential pressure transmitter, are connected with a device to be tested, and the position where the high-pressure side sampling pipe is connected with the device to be tested is higher than the position where the low-pressure side sampling pipe is connected with the device to be tested; and the high-pressure side sampling pipe is also provided with a high-pressure flushing three-way valve and a high-pressure pollution discharge three-way valve which are used for cleaning the high-pressure side sampling pipe and injecting detection liquid.
The utility model discloses a set up the high pressure and wash the three-way valve on high pressure side sampling pipe, can wash high pressure side sampling pipe from the external introduction liquid, avoided high pressure side sampling pipe to block up, can discharge through high-pressure blowdown three-way valve after clean the end. In order to further ensure the liquid level detection precision, liquid can be continuously injected into the high-pressure side sampling pipe from the high-pressure flushing three-way valve, a liquid column with a certain height is ensured to exist in the high-pressure side sampling pipe, and the liquid level height detection accuracy of the device to be detected is ensured.
In an alternative embodiment, a low pressure flush three-way valve and a low pressure blowdown three-way valve are mounted on the low pressure side sampling tube for cleaning the low pressure side sampling tube.
In an optional embodiment, the low-pressure blowdown three-way valve is installed at one end of the low-pressure side sampling pipe close to the device to be tested, and the low-pressure flushing three-way valve is installed at one end of the low-pressure side sampling pipe close to the differential pressure transmitter.
Preferably, the low-pressure side sampling tube is communicated with the device to be tested through the low-pressure blowdown three-way valve, so that the whole sampling tube can be flushed when the cleaning liquid is cleaned.
In an optional embodiment, the high-pressure blowdown three-way valve is installed at one end of the high-pressure side sampling pipe close to the device to be tested, and the high-pressure flushing three-way valve is installed at one end of the high-pressure side sampling pipe close to the differential pressure transmitter.
Preferably, the high-pressure side sampling tube is communicated with the device to be tested through the high-pressure blowdown three-way valve, so that the whole sampling tube can be flushed when the cleaning liquid is cleaned.
In an optional embodiment, the system further comprises a high-pressure side isolation door, and the high-pressure side sampling pipe is connected with the differential pressure transmitter through the high-pressure side isolation door.
The high-pressure side isolation door can isolate liquid in the high-pressure side sampling pipe from the differential pressure transmitter.
In an optional embodiment, the system further comprises a low-pressure side isolation door, and the low-pressure side sampling pipe is connected with the differential pressure transmitter through the low-pressure side isolation door.
The low-pressure side isolating door can isolate a small part of condensed water in the low-pressure side sampling pipe from the differential pressure transmitter.
A second aspect, the utility model provides a differential pressure formula level measurement system, the differential pressure formula level gauge that provides in await measuring device, water tank and the aforementioned arbitrary embodiment, the low pressure side sampling pipe and the high pressure side sampling pipe of differential pressure formula level gauge all are connected with the await measuring device, and the high pressure side sampling pipe is washed the three-way valve through the high pressure and is connected with the water tank.
In an alternative embodiment, the low-side sample line is connected to the tank by a low-pressure flush three-way valve.
In an alternative embodiment, the device under test comprises at least one of a liquid storage tank, a stirrer, a rectifying tower and a fermentation vessel.
In alternative embodiments, the liquid in the tank is any one of tap water, demineralized water, or an aqueous solution containing a cleaning agent.
The utility model provides a pair of differential pressure formula level measurement system, its theory of operation as follows:
when the differential pressure type liquid level meter normally works, the high-pressure flushing three-way valve and the low-pressure flushing three-way valve are adjusted to be not communicated with a connecting pipe of the water tank, and the high-pressure blowdown three-way valve and the low-pressure blowdown three-way valve are adjusted to be not communicated with an external sewage collecting device to perform liquid level detection.
When the high-pressure side sampling pipe and the low-pressure side sampling pipe need to be washed, the high-pressure washing three-way valve and the low-pressure washing three-way valve are respectively adjusted to be communicated with a connecting pipe of the water tank, liquid in the water tank enters the sampling pipe to be washed, after washing is finished, the high-pressure sewage discharge three-way valve and the low-pressure sewage discharge three-way valve are opened, sewage which is used for washing the sampling pipe is discharged to an external sewage collecting device, and the high-pressure sewage discharge three-way valve, the low-pressure sewage discharge three-way valve and the low-pressure washing three-way valve are closed. And continuously injecting water into the high-pressure side sampling pipe, closing the high-pressure blowdown three-way valve after a liquid column is formed, and continuously detecting the liquid level by using the differential pressure type liquid level meter.
The embodiment of the utility model provides a beneficial effect is:
a differential pressure type liquid level meter and a differential pressure type liquid level measuring system are characterized in that a high-pressure flushing three-way valve is arranged on a high-pressure side sampling pipe, liquid can be introduced from the outside to clean the high-pressure side sampling pipe, the high-pressure side sampling pipe is prevented from being blocked, and the liquid can be discharged through a high-pressure blowdown three-way valve after cleaning is finished. In order to further ensure the liquid level detection precision, liquid can be continuously injected into the high-pressure side sampling pipe from the high-pressure flushing three-way valve, a liquid column with a certain height is ensured to exist in the high-pressure side sampling pipe, and the liquid level detection accuracy of the device to be detected is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a differential pressure type liquid level measuring system according to a first embodiment of the present invention.
The diagram is 100-differential pressure type liquid level measuring system; 110-a device under test; 120-a water tank; 131-a differential pressure transmitter; 132-low pressure side sampling tube; 1321-low pressure flush three-way valve; 1322-low pressure blowdown three-way valve; 133-high pressure side sampling tube; 1331-high pressure flushing three-way valve; 1332-high pressure blowdown three-way valve; 134-high side isolation gate; 135-low side isolation gate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
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 the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral 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 as a specific case by those skilled in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a differential pressure type liquid level measuring system 100, which includes a device under test 110, a water tank 120, and a differential pressure type liquid level meter.
The differential pressure type liquid level meter includes a differential pressure transmitter 131, and a low pressure side sampling pipe 132 and a high pressure side sampling pipe 133 connected to the differential pressure transmitter 131, respectively.
The ends of the low-pressure side sampling tube 132 and the high-pressure side sampling tube 133 away from the differential pressure transmitter 131 are both connected to the device under test 110, and the position where the high-pressure side sampling tube 133 is connected to the device under test 110 is higher than the position where the low-pressure side sampling tube 132 is connected to the device under test 110.
The high-pressure side sampling pipe 133 is also provided with a high-pressure flushing three-way valve 1331 and a high-pressure blowdown three-way valve 1332 for cleaning the high-pressure side sampling pipe 133 and injecting a detection liquid.
In the present embodiment, a high-pressure flushing three-way valve 1331 is installed at one end of the high-pressure side sampling pipe 133 near the differential pressure transmitter 131, and the high-pressure side sampling pipe 133 is connected to the water tank 120 through the high-pressure flushing three-way valve 1331.
The high-pressure blowdown three-way valve 1332 is installed at one end of the high-pressure side sampling pipe 133 near the device under test 110, and the high-pressure side sampling pipe 133 is communicated with the device under test 110 through the high-pressure blowdown three-way valve 1332, so that the entire high-pressure side sampling pipe 133 can be flushed when the cleaning liquid is washed.
In this embodiment, a high-pressure side isolation door 134 is further installed between the high-pressure flushing three-way valve 1331 and the differential pressure transmitter 131, and the high-pressure side isolation door 134 can isolate the liquid in the high-pressure side sampling pipe 133 from the differential pressure transmitter 131.
The low-pressure side sampling pipe 132 is provided with a low-pressure flush three-way valve 1321 and a low-pressure drain three-way valve 1322 for cleaning the low-pressure side sampling pipe 132.
In this embodiment, a low-pressure-flushing three-way valve 1321 is installed at one end of the low-pressure-side sampling pipe 132 near the differential pressure transmitter 131, and the low-pressure-side sampling pipe 132 is connected to the water tank 120 through the low-pressure-flushing three-way valve 1321.
The low-pressure three-way drain valve 1322 is installed at an end of the low-pressure side sampling tube 132 close to the device under test 110, and the low-pressure side sampling tube 132 is communicated with the device under test 110 through the low-pressure three-way drain valve 1322, so that the entire low-pressure side sampling tube 132 can be flushed when the cleaning liquid is washed.
In this embodiment, a low-pressure side isolation gate 135 is further installed between the low-pressure flushing three-way valve 1321 and the differential pressure transmitter 131, and the low-pressure side isolation gate 135 can isolate a small portion of condensed water in the low-pressure side sampling pipe 132 from the differential pressure transmitter 131.
In this embodiment, the device under test 110 is a reservoir and the liquid in the tank 120 for cleaning and replenishing is demineralized water.
The differential pressure type liquid level measuring system 100 provided by the embodiment has the following working principle:
when the differential pressure type liquid level meter normally works, the high-pressure flushing three-way valve 1331 and the low-pressure flushing three-way valve 1321 are adjusted to be not communicated with the connecting pipe of the water tank 120, and the high-pressure blowdown three-way valve 1332 and the low-pressure blowdown three-way valve 1322 are adjusted to be not communicated with an external sewage collecting device, so that liquid level detection is performed.
When the high-pressure side sampling pipe 133 and the low-pressure side sampling pipe 132 need to be flushed, the high-pressure flushing three-way valve 1331 and the low-pressure flushing three-way valve 1321 are respectively adjusted to be communicated with a connecting pipe of the water tank 120, liquid in the water tank 120 enters the sampling pipe to be flushed, after flushing is finished, the high-pressure blowdown three-way valve 1332 and the low-pressure blowdown three-way valve 1322 are opened, sewage for flushing the sampling pipe is discharged to an external sewage collecting device, and the high-pressure blowdown three-way valve 1332, the low-pressure blowdown three-way valve 1322 and the low-pressure flushing three-way valve 1321 are closed. Water is continuously injected into the high-pressure side sampling pipe 133 to form a liquid column, and then the high-pressure flushing three-way valve 1331 is closed to allow the differential pressure type liquid level meter to continuously perform liquid level detection.
The embodiment of the utility model provides a pair of differential pressure type level gauge, differential pressure type level measurement system 100, it has following advantage at least:
by providing the high-pressure flushing three-way valve 1331 on the high-pressure side sampling pipe 133, liquid can be introduced from the outside to clean the high-pressure side sampling pipe 133, so that the high-pressure side sampling pipe 133 is prevented from being blocked, and the liquid can be discharged through the high-pressure blowdown three-way valve 1332 after cleaning. In order to further ensure the liquid level detection accuracy, the liquid may be continuously injected into the high-pressure side sampling pipe 133 from the high-pressure flushing three-way valve 1331, so as to ensure that a liquid column with a certain height exists in the high-pressure side sampling pipe 133, and ensure the liquid level detection accuracy of the device under test 110.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A differential pressure type liquid level meter is characterized by comprising a differential pressure transmitter, and a low-pressure side sampling pipe and a high-pressure side sampling pipe which are respectively connected with the differential pressure transmitter;
the ends, far away from the differential pressure transmitter, of the low-pressure side sampling pipe and the high-pressure side sampling pipe are both connected with a device to be tested, and the position where the high-pressure side sampling pipe is connected with the device to be tested is higher than the position where the low-pressure side sampling pipe is connected with the device to be tested; and the high-pressure side sampling pipe is also provided with a high-pressure flushing three-way valve and a high-pressure pollution discharge three-way valve which are used for cleaning the high-pressure side sampling pipe and injecting detection liquid.
2. The differential pressure type liquid level gauge according to claim 1, wherein a low-pressure flushing three-way valve and a low-pressure blowdown three-way valve are installed on the low-pressure side sampling pipe for cleaning the low-pressure side sampling pipe.
3. The differential pressure type liquid level gauge according to claim 2, wherein the low pressure blowdown three-way valve is installed at an end of the low pressure side sampling pipe close to the device under test, and the low pressure flushing three-way valve is installed at an end of the low pressure side sampling pipe close to the differential pressure transmitter.
4. The differential pressure type liquid level gauge according to claim 1, wherein the high pressure drain three-way valve is installed at an end of the high pressure side sampling pipe close to the device under test, and the high pressure flush three-way valve is installed at an end of the high pressure side sampling pipe close to the differential pressure transmitter.
5. The differential pressure type liquid level gauge according to any one of claims 2 to 4, further comprising a high pressure side isolation door, wherein the high pressure side sampling tube is connected with a differential pressure transmitter through the high pressure side isolation door.
6. The differential pressure level gauge of claim 5, further comprising a low pressure side isolation gate, the low pressure side sampling tube being connected to a differential pressure transmitter through the low pressure side isolation gate.
7. A differential pressure type liquid level measurement system is characterized by comprising a device to be measured, a water tank and the differential pressure type liquid level meter according to any one of claims 1 to 6, wherein a low-pressure side sampling pipe and a high-pressure side sampling pipe of the differential pressure type liquid level meter are both connected with the device to be measured, and the high-pressure side sampling pipe is connected with the water tank through the high-pressure flushing three-way valve.
8. The system of claim 7, wherein the low pressure side sample line is connected to the tank by a low pressure flush three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310677.8U CN218349583U (en) | 2022-08-30 | 2022-08-30 | Differential pressure type liquid level meter and differential pressure type liquid level measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222310677.8U CN218349583U (en) | 2022-08-30 | 2022-08-30 | Differential pressure type liquid level meter and differential pressure type liquid level measuring system |
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| Publication Number | Publication Date |
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| CN218349583U true CN218349583U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222310677.8U Active CN218349583U (en) | 2022-08-30 | 2022-08-30 | Differential pressure type liquid level meter and differential pressure type liquid level measuring system |
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| CN (1) | CN218349583U (en) |
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- 2022-08-30 CN CN202222310677.8U patent/CN218349583U/en active Active
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