CN216116244U - Blowing type liquid level meter - Google Patents
Blowing type liquid level meter Download PDFInfo
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- CN216116244U CN216116244U CN202122697648.7U CN202122697648U CN216116244U CN 216116244 U CN216116244 U CN 216116244U CN 202122697648 U CN202122697648 U CN 202122697648U CN 216116244 U CN216116244 U CN 216116244U
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Abstract
The utility model provides an air blowing type liquid level meter which comprises an air blowing pipeline and a measuring pipeline, wherein the air blowing pipeline comprises a positive pressure air blowing pipe and a negative pressure air blowing pipe, the positive pressure air blowing pipe is communicated with the bottom of a material in a reaction kettle, the negative pressure air blowing pipe is communicated with the air above the material in the reaction kettle, the measuring pipeline comprises a differential pressure transmitter, a valve group, a positive pressure measuring and drawing pipe and a negative pressure measuring and drawing pipe, the differential pressure transmitter is communicated with the valve group, one end of the positive pressure measuring and drawing pipe and one end of the negative pressure measuring and drawing pipe are respectively communicated with two joints of the valve group, and the other end of the positive pressure measuring and drawing pipe and the other end of the negative pressure measuring and drawing pipe are respectively communicated with the positive pressure air blowing pipe and the negative pressure air blowing pipe. Through designing the blowing pipeline and the measuring pipeline separately, the differential pressure transmitter becomes a part independent of the whole blowing pipeline, and the differential pressure transmitter can be detached, replaced and adjusted to the zero point without interrupting blowing.
Description
Technical Field
The utility model relates to the technical field of polyester chemical fibers, in particular to an air blowing type liquid level meter.
Background
In the industries of polyester chemical fiber, petrochemical industry and the like, an air blowing type liquid level meter is generally required to measure the liquid level in a reaction kettle. The air blowing type liquid level meter can be understood as a non-contact type liquid level measuring instrument which can measure materials in an open or closed container. Except that the gas blowing pipe is contacted with the measured medium, the gas blowing device and the differential pressure transmitter measuring element are not contacted with the measured medium, thereby protecting the measuring element, reducing the maintenance amount of the instrument and increasing the reliability of measurement. Because the blowing device can ensure the output of gas with constant flow, the pressure measured by the differential pressure transmitter can automatically follow the change of the outlet pressure of the blowing pipe, and therefore, the signal output by the differential pressure transmitter corresponds to the liquid level height of the medium.
At present, an air blowing pipeline directly passes through a differential pressure transmitter in the measurement process of an air blowing liquid level meter, namely the differential pressure transmitter is equivalent to a part in the connection process of the air blowing pipeline, and the function of measuring a pressure guiding pipeline is also achieved.
At present, the air blowing type liquid level meter used in the polyester chemical fiber industry is often long in service cycle (one year in short and five years in long), and is in a high vacuum environment for a long time (even reaching the absolute pressure of 100Pa), and under the severe condition, the zero drift condition of the differential pressure transmitter often occurs. However, the blowing device needs to work continuously, and the differential pressure transmitter cannot be debugged or maintained under the condition that the blowing device is not influenced. If the gas circuit is closed, the material in the reaction kettle is worried to flow backwards to block the gas blowing pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an air blowing type liquid level meter, which enables a differential pressure transmitter to become a component independent of the whole air blowing pipeline by separately designing the air blowing pipeline and a measuring pipeline, and can realize the disassembly, replacement and zero point adjustment of the differential pressure transmitter without interrupting air blowing.
In order to achieve the purpose, the utility model provides an air blowing type liquid level meter which comprises an air blowing pipeline and a measuring pipeline, wherein the air blowing pipeline comprises a positive pressure air blowing pipe and a negative pressure air blowing pipe, the positive pressure air blowing pipe is communicated with the bottom of a material in a reaction kettle, the negative pressure air blowing pipe is communicated with gas above the material in the reaction kettle, the measuring pipeline comprises a differential pressure transmitter, a valve group, a positive pressure measuring and drawing pipe and a negative pressure measuring and drawing pipe, the differential pressure transmitter is communicated with the valve group, one end of the positive pressure measuring and drawing pipe and one end of the negative pressure measuring and drawing pipe are respectively communicated with two joints of the valve group, and the other end of the positive pressure measuring and drawing pipe and the other end of the negative pressure measuring and drawing pipe are respectively communicated with the positive pressure air blowing pipe and the negative pressure air blowing pipe.
Optionally, the positive pressure measuring and drawing pipe and the negative pressure measuring and drawing pipe are respectively provided with a first ball valve.
Optionally, a sealing gasket is further arranged at the joint of the valve group and the differential pressure transmitter.
Optionally, the valve group is a three-valve group or a five-valve group.
Optionally, a high-pressure valve in the valve group is communicated with the positive pressure measuring and pressure guiding pipe, and a low-pressure valve in the valve group is communicated with the negative pressure measuring and pressure guiding pipe.
Optionally, the other end of the positive pressure measuring and pressure drawing pipe and the other end of the negative pressure measuring and pressure drawing pipe are respectively communicated with the positive pressure blowing pipe and the negative pressure blowing pipe through a three-way valve.
Optionally, the air blowing type liquid level meter further comprises an air inlet pipe, a pressure reducing valve, an air flow distributor and two rotameters which are communicated in sequence, wherein air outlets of the two rotameters are communicated with the positive pressure air blowing pipe and the negative pressure air blowing pipe respectively.
Optionally, the airflow distributor is installed on the differential pressure transmitter, and the two rotameters are installed on the airflow distributor.
Optionally, the positive pressure gas blowing pipe and the negative pressure gas blowing pipe are respectively provided with a second ball valve.
Optionally, the positive pressure gas blowing pipe and the negative pressure gas blowing pipe are respectively provided with a check valve, and the check valve is located in front of the second ball valve.
The utility model provides an air blowing type liquid level meter, which is characterized in that an air blowing pipeline and a measuring pipeline are separately designed, so that a differential pressure transmitter becomes a component independent of the whole air blowing pipeline, and the differential pressure transmitter can be disassembled, replaced and adjusted to a zero point under the condition of not interrupting air blowing.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the utility model and do not constitute any limitation to the scope of the utility model. Wherein:
FIG. 1 is a schematic diagram of a configuration of an air-blown level gauge provided in the prior art;
fig. 2 is a schematic structural diagram of an air blowing type liquid level meter provided by an embodiment of the utility model.
In the drawings:
1, an air inlet pipe; 2-a pressure reducing valve; 3-a gas flow distributor; 4-a differential pressure transmitter; 5-a rotameter; 6-positive pressure side-blown tube; 7-negative pressure side blowing pipe; 8-a reaction kettle;
11-positive pressure measuring blowing pipe; 12-a negative pressure measuring blowing pipe; 13-a reaction kettle; 14-differential pressure transmitter; 15-a valve group; 16-positive pressure measuring and leading pipe; 17-negative pressure measuring and leading pipe; 18-an air inlet pipe; 19-a pressure relief valve; 20-a gas flow distributor; 21-a rotameter; 22-a first ball valve; 23-a one-way valve; 24-a second ball valve; 25-three-way valve.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air-blowing type liquid level meter provided in the prior art, the air blowing type liquid level meter comprises an air inlet pipe 1, a pressure reducing valve 2, an air flow distributor 3, a differential pressure transmitter 4 and two rotor flowmeters 5, materials sequentially pass through the air inlet pipe 1 and the pressure reducing valve 2 and then reach the air flow distributor 3, the positive pressure side detection port and the negative pressure side detection port of the differential pressure transmitter 4 are respectively communicated with the two rotameters 5 through the airflow distributor 3, the two rotameters 5 are respectively communicated with the bottom of the material in the reaction kettle 8 and the gas above the material in the reaction kettle 8 through the positive pressure side blowing pipe 6 and the negative pressure side blowing pipe 7, the differential pressure transmitter 4 detects the pressure difference between the upper part and the bottom part of the material in the reaction kettle 8 through the positive pressure side blowing pipe 6 and the negative pressure side blowing pipe 7.
Because the air blowing pipeline directly passes through the differential pressure transmitter 4 in the measurement process of the air blowing liquid level meter, when the differential pressure transmitter 4 has zero drift, the differential pressure transmitter can not be debugged or maintained under the condition of not influencing an air blowing device.
Based on the above, the utility model provides an air blowing type liquid level meter, which can separate an air blowing pipeline and a measuring pipeline, so that a differential pressure transmitter becomes a component independent of the whole air blowing pipeline, and the differential pressure transmitter can be partially disassembled, replaced and adjusted to a zero point under the condition of not interrupting air blowing.
To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an air blowing type liquid level meter according to an embodiment of the present invention. This embodiment provides an air blowing type level gauge, including blowing pipeline and measurement pipeline, the blowing pipeline includes malleation survey gas blow pipe 11 and negative pressure survey gas blow pipe 12, the bottom intercommunication of the material in malleation survey gas blow pipe 11 and reation kettle 13, negative pressure survey gas blow pipe 12 with the gas intercommunication of material top in reation kettle 13, the measurement pipeline includes differential pressure transmitter 14, valves 15, malleation survey the lead pressure pipe 16 and negative pressure survey the lead pressure pipe 17, differential pressure transmitter 14 with valves 15 intercommunication, malleation survey the lead pressure pipe 16 one end and the negative pressure survey the lead pressure pipe 17 one end respectively with two of valves 15 connect the intercommunication, malleation survey the lead pressure pipe 16 the other end and the negative pressure survey the lead pressure pipe 17 the other end respectively with malleation survey gas blow pipe 11 and negative pressure survey gas blow pipe 12 intercommunication.
By separately designing the blowing pipeline and the measuring pipeline, the differential pressure transmitter 14 becomes a component independent of the whole blowing pipeline, and the differential pressure transmitter can be detached, replaced and adjusted to the zero point without interrupting blowing.
Specifically, the air blowing type liquid level meter further comprises an air inlet pipe 18, a pressure reducing valve 19, an air flow distributor 20 and two rotor flow meters 21 which are sequentially communicated, and air outlets of the two rotor flow meters 21 are respectively communicated with the positive pressure air blowing pipe 11 and the negative pressure air blowing pipe 12. The gas inlet pipe 18 is usually communicated with a gas source to receive gas, the gas source is, for example, compressed gas, the gas enters the gas flow distributor 20 after being decompressed by the decompression valve 19, the rotameters 21 are used for measuring the flow rate of the gas, the gas inlets of the two rotameters 21 are respectively communicated with the gas outlet on the high pressure side and the gas outlet on the low pressure side of the gas flow distributor 20, the gas outlets of the two rotameters 21 are respectively communicated with the gas blowing pipe 11 for positive pressure measurement and the gas blowing pipe 12 for negative pressure measurement, the gas blowing branch on the positive pressure side is communicated with the bottom of the material in the reaction kettle 13, and the gas branch on the negative pressure side is communicated with the gas above the material in the reaction kettle 13.
In this embodiment, the airflow distributor 20 is mounted on the differential pressure transmitter 14, and the two rotameters 21 are mounted on the airflow distributor 20.
Preferably, the positive pressure gas blowing pipe 11 and the negative pressure gas blowing pipe 12 are respectively provided with a second ball valve 24. When the device (such as the rotameter 21) in front of the second ball valve 24 is damaged, the second ball valve 24 can be closed to realize online replacement when replacement is needed.
Preferably, the positive pressure side blowing pipe 11 and the negative pressure side blowing pipe 12 are respectively provided with a check valve 23, and the check valve 23 is located in front of the second ball valve 24. The check valve 23 is arranged to prevent the material flow in the reaction kettle 13 from flowing back to the device in front of the check valve 23, which causes damage to the device.
Referring to fig. 2, the positive pressure measuring and pressure guiding pipe 16 and the negative pressure measuring and pressure guiding pipe 17 are further provided with a first ball valve 22 respectively. When a device (such as the differential pressure transmitter 14) in front of the first ball valve 22 is damaged, the first ball valve 22 can be closed to realize online replacement when replacement is needed. Meanwhile, when the differential pressure transmitter 14 is overhauled, the gas in the positive pressure gas blowing pipe 11 and the gas in the negative pressure gas blowing pipe 12 can be prevented from flowing back by closing the first ball valve 22. In addition, when a leakage point occurs, by closing ball valves at different positions, for example, the second ball valve 24 on the positive pressure side blowing pipe 11 and the negative pressure side blowing pipe 12 or the first ball valve 22 on the positive pressure side pressure measuring and pressure guiding pipe 16 and the negative pressure side pressure measuring and pressure guiding pipe 17, the segmented search of the leakage point can be realized, and the search efficiency is improved.
In this embodiment, a sealing gasket is further disposed at a connection between the valve set 15 and the differential pressure transmitter 14. And a sealing gasket is arranged at the joint of the valve group 15 and the differential pressure transmitter 14 to improve air tightness.
Preferably, the valve set 15 is a three-valve set or a five-valve set. And a high-pressure valve in the valve group 15 is communicated with the positive pressure measuring and pressure guiding pipe 16, and a low-pressure valve in the valve group is communicated with the negative pressure measuring and pressure guiding pipe 17. When valves 15 is five valves, still include two blowoff valves, if the unexpected backward flow of material is to in differential pressure transmitter 14, the accessible closes high-pressure valve and the low-pressure valve, then opens the blowoff valve with will the material is discharged.
In this embodiment, the other end of the positive pressure measurement and pressure introduction pipe 16 and the other end of the negative pressure measurement and pressure introduction pipe 17 are respectively communicated with the positive pressure blowing pipe 11 and the negative pressure blowing pipe 12 through a three-way valve 25.
To sum up, the embodiment of the utility model provides an air blowing type liquid level meter, which comprises an air blowing pipeline and a measuring pipeline, wherein the air blowing pipeline comprises a positive pressure air blowing pipe and a negative pressure air blowing pipe, the positive pressure air blowing pipe is communicated with the bottom of a material in a reaction kettle, the negative pressure air blowing pipe is communicated with the gas above the material in the reaction kettle, the measuring pipeline comprises a differential pressure transmitter, a valve group, a positive pressure measuring and leading pipe and a negative pressure measuring and leading pipe, the differential pressure transmitter is communicated with the valve group, one end of the positive pressure measuring and leading pipe and one end of the negative pressure measuring and leading pipe are respectively communicated with two joints of the valve group, and the other end of the positive pressure measuring and leading pipe and the other end of the negative pressure measuring and leading pipe are respectively communicated with the positive pressure air blowing pipe and the negative pressure air blowing pipe. Through designing the blowing pipeline and the measuring pipeline separately, the differential pressure transmitter becomes a part independent of the whole blowing pipeline, and the differential pressure transmitter can be detached, replaced and adjusted to the zero point without interrupting blowing.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. The utility model provides an air blowing type level gauge, its characterized in that, includes the blowing pipeline and measures the pipeline, the blowing pipeline includes malleation gas measurement blow pipe and negative pressure gas measurement blow pipe, the bottom intercommunication of the material in malleation gas measurement blow pipe and the reation kettle, negative pressure gas measurement blow pipe with the gas intercommunication of the material top in the reation kettle, it includes differential pressure transmitter, valves, malleation pressure measurement pipe and negative pressure measurement pipe to measure the pipeline, differential pressure transmitter with the valves intercommunication, the one end of malleation pressure measurement pipe reaches the one end of negative pressure measurement pipe respectively with two joint intercommunications of valves, the other end of malleation pressure measurement pipe reaches the other end of negative pressure measurement pressure pipe respectively with malleation gas measurement blow pipe reaches negative pressure measurement blow pipe intercommunication.
2. The air-blowing liquid level meter according to claim 1, wherein the positive pressure measuring and pressure drawing pipe and the negative pressure measuring and pressure drawing pipe are respectively provided with a first ball valve.
3. The air-blown liquid level meter of claim 1, wherein a sealing gasket is further arranged at the joint of the valve group and the differential pressure transmitter.
4. The insufflating level gauge of claim 1, wherein said valve bank is a three-valve bank or a five-valve bank.
5. An air-blown liquid level meter as claimed in claim 4 wherein a high pressure valve in the valve bank is in communication with the positive pressure and pilot tube and a low pressure valve in the valve bank is in communication with the negative pressure and pilot tube.
6. An air blowing type liquid level meter according to claim 1, wherein the other end of the positive pressure measuring and pressure drawing pipe and the other end of the negative pressure measuring and pressure drawing pipe are respectively communicated with the positive pressure air blowing pipe and the negative pressure air blowing pipe through a three-way valve.
7. An air blowing type liquid level meter according to claim 1, wherein said air blowing type liquid level meter further comprises an air inlet pipe, a pressure reducing valve, an air flow distributor and two rotameters which are sequentially communicated, and air outlets of said two rotameters are respectively communicated with said positive pressure air blowing pipe and said negative pressure air blowing pipe.
8. An insufflating level gauge according to claim 7 wherein said air flow distributor is mounted on said differential pressure transmitter and two of said rotameters are mounted on said air flow distributor.
9. The insufflating level gauge according to claim 1, wherein said positive pressure side insufflating pipe and said negative pressure side insufflating pipe are respectively provided with a second ball valve.
10. The insufflating level gauge according to claim 9, wherein said positive pressure side insufflating pipe and said negative pressure side insufflating pipe are respectively provided with a check valve, and said check valves are positioned in front of said second ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122697648.7U CN216116244U (en) | 2021-11-05 | 2021-11-05 | Blowing type liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122697648.7U CN216116244U (en) | 2021-11-05 | 2021-11-05 | Blowing type liquid level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216116244U true CN216116244U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122697648.7U Active CN216116244U (en) | 2021-11-05 | 2021-11-05 | Blowing type liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216116244U (en) |
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2021
- 2021-11-05 CN CN202122697648.7U patent/CN216116244U/en active Active
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