CN220084230U - Pressure transmitter resistant to hydrofluoric acid corrosion - Google Patents
Pressure transmitter resistant to hydrofluoric acid corrosion Download PDFInfo
- Publication number
- CN220084230U CN220084230U CN202321638358.8U CN202321638358U CN220084230U CN 220084230 U CN220084230 U CN 220084230U CN 202321638358 U CN202321638358 U CN 202321638358U CN 220084230 U CN220084230 U CN 220084230U
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- Prior art keywords
- pipeline
- connecting flange
- medium
- hydrofluoric acid
- diaphragm
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 36
- 230000008569 process Effects 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229910000856 hastalloy Inorganic materials 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a pressure transmitter resistant to hydrofluoric acid corrosion, comprising: a process medium conduit; the detection pipeline is communicated with the process medium pipeline, a first membrane is arranged on the detection pipeline, and a pressure transmission medium is arranged in the process medium pipeline; the detection module is used for detecting the conductivity value of the medium in the detection pipeline and is used for pre-judging that the corrosive medium enters the pressure transmission medium; the display module is provided with a second diaphragm at the position of the display module, which is close to the detection pipeline, the first diaphragm deforms through a pressure transmission medium, and the display module is used for measuring the deformation of the second diaphragm. According to the pressure transmitter resistant to hydrofluoric acid corrosion, corrosive media can be pre-judged to enter the pressure transmission media in advance by adding the first membrane and the detection module, so that the risk of corrosion of the display module is reduced, the operation period of the display module is prolonged, the operation state of the display module is monitored in time, and the operation efficiency of the device is improved.
Description
Technical Field
The utility model relates to the technical field of pressure transmitters, in particular to a hydrofluoric acid corrosion resistant pressure transmitter.
Background
In the chemical production process, in order to ensure the safety, stability and reasonable control of the whole process, a corresponding pressure transmitter needs to be installed and the stability of the pressure transmitter is ensured. A pressure transducer is a device that converts pressure into a pneumatic or electric signal for control and remote transmission. The sensor can convert physical pressure parameters such as gas, liquid and the like sensed by the load cell sensor into standard electric signals so as to supply secondary instruments such as an indication alarm instrument, a recorder, a regulator and the like to carry out measurement, indication and process adjustment.
In the process of fluoride industry, as materials contain HF (hydrogen fluoride is an inorganic compound, has a chemical formula of HF, is colorless and toxic gas with pungent smell in a normal state, has very strong hygroscopicity, can generate white smog when being contacted with air, is easy to dissolve in water and can be infinitely mutually dissolved with water to form hydrofluoric acid) and other corrosive materials, the operation stability of the pressure transmitter is poor, and meanwhile, the operation period of the pressure transmitter is also short due to the strong permeability of HF; and pressure transmitter failure may result in a safety hazard.
Therefore, increasing the length of time that the pressure transmitter is used and increasing the stability is critical in the fluoride process.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to solve the problem that the pressure transmitter is easy to damage due to the corrosiveness of the corrosive materials when the pressure transmitter is applied to the materials with corrosiveness in the prior art.
In order to solve the technical problems, the present utility model provides a pressure transmitter resistant to hydrofluoric acid corrosion, comprising: a process medium pipe filled with a process medium; the device comprises a detection pipeline, a pressure transmission medium and a pressure sensor, wherein one end of the detection pipeline is connected with a process medium pipeline, the detection pipeline is communicated with the process medium pipeline, a first diaphragm is arranged on the detection pipeline, the first diaphragm is positioned at the position of the end part of the detection pipeline, which is close to the process medium pipeline, and the pressure transmission medium is arranged in the process medium pipeline; the detection module is connected with the detection pipeline and is used for detecting the conductivity value of the medium in the detection pipeline so as to predict that the corrosive medium enters the pressure transmission medium; the display module is connected with the other end of the detection pipeline far away from the process medium pipeline, a second diaphragm is arranged at the position, close to the detection pipeline, of the display module, the first diaphragm deforms through a pressure transmission medium, and the display module is used for measuring the deformation of the second diaphragm. According to the pressure transmitter resistant to hydrofluoric acid corrosion, corrosive media can be pre-judged to enter the pressure transmission media in advance by adding the first membrane and the detection module, so that the risk of corrosion of the display module is reduced, the operation period of the display module is prolonged, the operation state of the display module is monitored in time, and the operation efficiency of the device is improved.
In one embodiment of the utility model, the first membrane is pleated, and the pleats of the first membrane are deformable toward the pressure medium side.
In one embodiment of the utility model, the pressure transfer medium is a fluorine oil.
In one embodiment of the utility model, the display module is a pressure gauge display.
In one embodiment of the utility model, the detection module is a conductivity transducer, a PH meter, or a conductivity meter.
In one embodiment of the present utility model, the second membrane is made of hastelloy, and a side of the second membrane, which is in contact with the pressure-transmitting medium, is coated with polytetrafluoroethylene.
In an embodiment of the present utility model, the first membrane is made of carbon steel.
In one embodiment of the utility model, a first connecting flange is arranged on the process medium pipeline, a second connecting flange and a third connecting flange are respectively connected to two ends of the detecting pipeline in the length direction, the first connecting flange is connected with the second connecting flange, a fourth connecting flange is arranged on the display module, and the third connecting flange is connected with the fourth connecting flange.
In one embodiment of the utility model, a first sealing ring is arranged at the joint of the first connecting flange and the second connecting flange.
In one embodiment of the utility model, a second sealing ring is arranged at the joint of the third connecting flange and the fourth connecting flange.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the pressure transmitter resistant to hydrofluoric acid corrosion solves the problems that the conventional pressure gauge is poor in corrosion resistance and short in service time, the conventional pressure gauge is not easy to detect when corrosion occurs, potential safety hazards exist, the risk of corrosion of the pressure gauge is reduced by using a double-layer diaphragm form, and the equipped installation conductivity meter confirms the running state of the pressure gauge, so that the corrosion resistance of the pressure gauge is improved; timely finding out the abnormal condition of the pressure gauge; and the running cost of enterprises is reduced.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of a hydrofluoric acid resistant pressure transmitter of the present utility model.
Description of the specification reference numerals: : process medium pipeline 1, detection pipeline 2, diaphragm one 21, pressure transmission medium 22, detection module 3, display module 4, diaphragm two 41.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Referring to FIG. 1, a hydrofluoric acid resistant pressure transmitter of the present utility model comprises: a process medium pipeline 1, a detection pipeline 2, a detection module 3 and a display module 4; a process medium pipe 1 filled with a process medium; a detection pipeline 2, one end of which is connected with the process medium pipeline 1, and the detection pipeline 2 is communicated with the process medium pipeline 1, a first membrane 21 is arranged on the detection pipeline 2, the first membrane 21 is positioned at the position of the end part of the detection pipeline 2, which is close to the process medium pipeline 1, and a pressure transmission medium 22 is arranged in the process medium pipeline 1; the detection module 3 is connected with the detection pipeline 2, and the detection module 3 is used for detecting the conductivity value of the medium in the detection pipeline 2 so as to predict that corrosive medium enters the pressure transmission medium 22; the display module 4 is connected with the other end of the detection pipeline 2 far away from the process medium pipeline 1, a second diaphragm 41 is arranged at the position, close to the detection pipeline 2, of the display module 4, the first diaphragm 21 causes deformation of the second diaphragm 41 through the pressure transmission medium 22, and the display module 4 is used for measuring the deformation of the second diaphragm 41.
When the first diaphragm 21 is abnormal, HF leakage exists, materials in the process medium pipeline 1 pass through the first diaphragm 21 and enter the detection pipeline 2, so that HF is mixed in the pressure transmission medium 22, and the detection module 3 always detects the medium in the detection pipeline 2, so that the detection module 3 can timely detect the leakage. In the above structure, the measurement principle of the display module 4 is that when materials are conveyed in the process medium pipeline 1; the pressure is measured through the first diaphragm 21, is transmitted to the second diaphragm 41 through the pressure transmission medium 22, and finally the pressure is displayed on the display module 4; when an abnormal situation occurs, feedback is sent through the detection module 3.
The first membrane 21 is pleated, and the pleats of the first membrane 21 may deform toward the pressure medium 22. The first membrane 21 has a corrugated structure, and can be deformed by a certain amount, similar to a bellows.
The pressure medium 22 of the present utility model mainly has the following two functions: function one, when the first membrane 21 works normally, can transmit the pressure to the second membrane 41, in order to achieve the purpose of measuring; in order to prevent corrosion and penetration of the HF medium when the diaphragm 41 is abnormal or broken, the pressure transmission medium 22 is preferably fluorine oil.
The display module 4 is a pressure gauge display, and the pressure gauge display displays pressure by transmitting pressure deformation to a pointer through elastic deformation of sensitive elements (Bowden tube, bellows and bellows) in the gauge and then causing the pointer to rotate by a conversion mechanism of a movement in the gauge. The detection module 3 is a conductivity transducer, a PH meter or a conductivity meter, preferably a conductivity meter, which is a digital representation of the ability of the solution to conduct current.
Since the second diaphragm 41 is directly contacted with the material, and the material contains HF medium, which has strong corrosiveness and permeability, the material is selected according to the characteristics, so the material of the second diaphragm 41 is hastelloy, and the side of the second diaphragm 41 contacted with the pressure transmission medium 22 is coated with polytetrafluoroethylene. The first membrane 21 is made of carbon steel because the first membrane 21 is in contact with the medium 22.
According to the utility model, a first connecting flange is arranged on the process medium pipeline 1, a second connecting flange and a third connecting flange are respectively connected to two ends of the detecting pipeline 2 in the length direction, the first connecting flange is connected with the second connecting flange, a fourth connecting flange is arranged on the display module 4, the third connecting flange is connected with the fourth connecting flange, a first sealing ring is arranged at the joint of the first connecting flange and the second connecting flange, and a second sealing ring is arranged at the joint of the third connecting flange and the fourth connecting flange.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A pressure transmitter resistant to hydrofluoric acid corrosion, comprising:
a process medium pipe filled with a process medium;
the device comprises a detection pipeline, a pressure transmission medium and a pressure sensor, wherein one end of the detection pipeline is connected with a process medium pipeline, the detection pipeline is communicated with the process medium pipeline, a first diaphragm is arranged on the detection pipeline, the first diaphragm is positioned at the position of the end part of the detection pipeline, which is close to the process medium pipeline, and the pressure transmission medium is arranged in the process medium pipeline;
the detection module is connected with the detection pipeline and is used for detecting the conductivity value of the medium in the detection pipeline so as to predict that the corrosive medium enters the pressure transmission medium;
the display module is connected with the other end of the detection pipeline far away from the process medium pipeline, a second diaphragm is arranged at the position, close to the detection pipeline, of the display module, the first diaphragm deforms through a pressure transmission medium, and the display module is used for measuring the deformation of the second diaphragm.
2. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the first membrane is in a fold shape, and the fold of the first membrane can deform towards one side of the pressure transmission medium.
3. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the pressure transmission medium is fluorine oil.
4. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the display module is a pressure gauge display.
5. The hydrofluoric acid resistant pressure transmitter of claim 4, wherein: the detection module is a conductivity transmitter, a PH meter or a conductivity meter.
6. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the second diaphragm is made of hastelloy, and one side of the second diaphragm, which is in contact with the pressure transmission medium, is coated with polytetrafluoroethylene.
7. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the first membrane is made of carbon steel.
8. The hydrofluoric acid resistant pressure transmitter of claim 1, wherein: the process medium pipeline is provided with a first connecting flange, two ends of the detecting pipeline in the length direction are respectively connected with a second connecting flange and a third connecting flange, the first connecting flange is connected with the second connecting flange, the display module is provided with a fourth connecting flange, and the third connecting flange is connected with the fourth connecting flange.
9. The hydrofluoric acid resistant pressure transmitter of claim 8, wherein: and a first sealing ring is arranged at the joint of the first connecting flange and the second connecting flange.
10. The hydrofluoric acid resistant pressure transmitter of claim 8, wherein: and a second sealing ring is arranged at the joint of the third connecting flange and the fourth connecting flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638358.8U CN220084230U (en) | 2023-06-27 | 2023-06-27 | Pressure transmitter resistant to hydrofluoric acid corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638358.8U CN220084230U (en) | 2023-06-27 | 2023-06-27 | Pressure transmitter resistant to hydrofluoric acid corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220084230U true CN220084230U (en) | 2023-11-24 |
Family
ID=88825358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321638358.8U Active CN220084230U (en) | 2023-06-27 | 2023-06-27 | Pressure transmitter resistant to hydrofluoric acid corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220084230U (en) |
-
2023
- 2023-06-27 CN CN202321638358.8U patent/CN220084230U/en active Active
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