CN111811612A - Split type level gauge - Google Patents
Split type level gauge Download PDFInfo
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- CN111811612A CN111811612A CN202010630353.5A CN202010630353A CN111811612A CN 111811612 A CN111811612 A CN 111811612A CN 202010630353 A CN202010630353 A CN 202010630353A CN 111811612 A CN111811612 A CN 111811612A
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- flange
- radio frequency
- pipe
- horn mouth
- liquid level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention provides a split type liquid level meter which comprises a probe assembly, a detection assembly and a radio frequency cable, wherein the probe assembly comprises a meter head, a first radio frequency connector and a first flange, the meter head is arranged on the first flange through the first radio frequency connector, the first radio frequency connector penetrates through the first flange and is connected with one end part of the radio frequency cable, the detection assembly comprises a second radio frequency connector, a second flange and a horn mouth, the second radio frequency connector and the horn mouth are respectively arranged at the upper end part and the lower end part of the second flange, and the second radio frequency connector is connected with the other end part of the radio frequency cable; the second flange is fixedly arranged on a port flange of the storage tank, a cooling cavity is arranged inside the side wall of the horn mouth, a flange through hole is formed inside the second flange, and a pipe assembly is arranged in the flange through hole. According to the invention, the cooling cavity is arranged in the bell mouth, so that the influence of high-temperature vapor on the detection assembly is reduced, and the detection precision is improved.
Description
Technical Field
The invention relates to the technical field of radar liquid level meters, in particular to a split type liquid level meter.
Background
In the implementation processes of industrial process control and factory automation, whether the height of the material level can be stably and reliably measured is very critical. The guided wave radar liquid level meter is very suitable for actual requirements due to the characteristics of rapid and stable measurement, high accuracy, simple and convenient arrangement and low cost. The guided wave radar liquid level meter is an electromagnetic wave distance measuring system based on a time travel principle, and when electromagnetic waves contact the surface of a measured object, the electromagnetic waves can be reflected back due to sudden change of dielectric constant. The time interval between the transmission and the reception of the electromagnetic waves is proportional to the distance from the radar probe to the measured medium, so that the distance from the instrument probe to the surface of the measured medium can be calculated.
The utility model discloses a china utility model, patent number is 2019216444405, discloses a split type low-loss guided wave radar level gauge, including radar probe subassembly, radar detection subassembly and radio frequency cable, can dismantle the connection through radio frequency cable between radar probe subassembly and the radar detection subassembly, radar probe subassembly includes the appearance lid, guided wave radar module, and instrument case, connection structure and first radio frequency connect, guided wave radar module set up in instrument case, and the other end that guided wave radar module one end is relative is connected through connection structure with the one end that first radio frequency connects. This technical scheme has realized the split type installation of guided wave radar level gauge, realizes the low-loss connection of two parts through the radio frequency cable, has solved the problem of the unable components of a whole that can function independently installation of guided wave radar level gauge in the existing market, makes the use that the guided wave radar can be better abominable in the environment, disturbs serious industrial field and needn't increase extra reinforcement anti-interference measure.
However, the above solution still has the following problems: (1) when the radar liquid level meter measures high-temperature liquid, the liquid is easy to gasify, and high-temperature gasified substances can influence a radar detection assembly of the radar liquid level meter, so that the measured liquid level is inaccurate, and the measuring result is influenced; (2) when some systems are measured, such as a sewage biological treatment system, because the system is easy to generate foam and dielectric constant difference exists between the foam and a liquid medium, the measured liquid level is inaccurate, and the measuring result is influenced; (3) when the radar liquid level meter is used for measuring the height of liquid in the storage tank, the tank bottom can generate echo waves, and the echo waves can interfere microwaves reflected by the liquid level and influence the measuring result.
Disclosure of Invention
The present invention is directed to a split liquid level meter to solve the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that: a split type liquid level meter comprises a probe assembly, a detection assembly and a radio frequency cable, wherein the probe assembly comprises a meter head, a first radio frequency connector and a first flange, the meter head is arranged on the first flange through the first radio frequency connector, the first radio frequency connector penetrates through the first flange and is connected with one end of the radio frequency cable, the detection assembly comprises a second radio frequency connector, a second flange and a horn mouth, the second radio frequency connector and the horn mouth are respectively arranged at the upper end part and the lower end part of the second flange, and the second radio frequency connector is connected with the other end of the radio frequency cable; the second flange is fixedly arranged on a port flange of the storage tank, a cooling cavity is formed in the side wall of the horn mouth, a flange through hole is formed in the second flange, a pipe assembly is arranged in the flange through hole, and the pipe assembly is communicated with the cooling cavity and used for introducing cooling water to cool the horn mouth.
Preferably, the pipe assembly comprises a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are respectively inserted into the flange through holes on the two sides of the bell mouth and are communicated with the cooling cavity.
As preferred scheme, still including sweeping the subassembly, sweep the subassembly including set up respectively in the left communicating pipe and the right communicating pipe of horn mouth both sides set up in the left calandria and the right calandria of horn mouth lower part both sides, and set up in the air cock of horn mouth bottom end portion, the subassembly still includes left intake pipe and right intake pipe, left side intake pipe and right intake pipe are pegged graft respectively in the flange through-hole that is located the horn mouth both sides, left side communicating pipe and right communicating pipe upper end respectively with left side intake pipe and right intake pipe link to each other, left side communicating pipe and right communicating pipe lower tip link to each other with left calandria and right calandria respectively, left side calandria and right calandria all are connected with a plurality.
As a preferred scheme, the left communicating pipe and the right communicating pipe are arranged along the outline of the outer wall of the bell mouth.
As a preferred scheme, the air nozzle is a steerable flat air nozzle.
Preferably, the fishing device further comprises a microwave absorption assembly, wherein the microwave absorption assembly comprises an absorption bottom plate arranged at the bottom of the storage tank, a pyramid fixedly arranged on the absorption bottom plate, and a hanging lug arranged on the absorption bottom plate and used for facilitating fishing.
Preferably, a fastening plate is fixedly arranged on the inner wall of the bottom of the storage tank, an opening space is formed in the middle of the fastening plate, a groove is formed in the inner side of the fastening plate, the absorption bottom plate is located in the opening space, a convex block is arranged on the outer side of the absorption bottom plate, and the convex block and the groove are matched with each other to be clamped and connected.
Preferably, the inner wall of the horn mouth is coated with a barium titanate coating, and the thickness of the barium titanate coating is 3-15 mm.
Compared with the prior art, the invention has the beneficial effects that:
(1) through setting up the cooling chamber in horn mouth inside to let in the cooling water to the cooling intracavity, cool down the cooling to surveying the subassembly, reduce the influence that high temperature gasification thing produced to surveying the subassembly, improved and detected the precision.
(2) Through set up on the horn mouth and sweep the subassembly, sweep the subassembly and can realize that left side sweeps or right side sweeps, gas blows out from the air cock, sweeps the foam on the below liquid level, blows the foam under the horn mouth or blows the outside, has reduced the influence of foam to liquid level meter detection precision.
(3) Install the microwave absorption subassembly in storage tank bottom, the microwave absorption subassembly has the pyramid, and the microwave that the radar level gauge was sent to the tank bottoms that the pyramid can be fine, greatly reduced the interference that the echo that the tank bottoms produced caused, improved measurement accuracy.
(4) Set up the buckling board at the tank bottoms, the buckling board carries out the block with microwave absorption subassembly and is connected, makes things convenient for microwave absorption subassembly's dismantlement, and when dismantling, the hangers on the microwave absorption subassembly is caught on to usable stock, conveniently salvages.
Drawings
The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 is a schematic view of an installation structure of a split type liquid level meter according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a split level gauge according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a flare and a second flange of an embodiment of the present invention;
FIG. 4 is an enlarged schematic view at A in FIG. 3;
FIG. 5 is a schematic structural diagram of a bell mouth according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a microwave absorbing assembly according to an embodiment of the present invention.
Reference numbers in the figures: 100 level gauge, 101 probe subassembly, 102 detection subassembly, 200 storage tanks, 201 port flange, 202 buckled board, 300 microwave absorption subassemblies, 301 absorption bottom plate, 302 pyramid, 303 hangers, 304 lug, 1 gauge outfit, 2 first radio frequency joint, 3 first flange, 4 radio frequency cable, 5 second radio frequency joint, 6 second flange, 601 flange through-hole, 7 horn mouth, 701 cooling chamber, 8 sweep the subassembly, 801 left communicating pipe, 802 right communicating pipe, 803 left calandria, 804 right calandria, 805 air cock, 9 pipe components, 901 inlet tube, 902 left intake pipe, 903 outlet pipe, 904 right intake pipe.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
An embodiment according to the present invention is shown in conjunction with fig. 1 and 2. The utility model provides a split type level gauge 100, including probe assembly 101, survey subassembly 102 and radio frequency cable 4, probe assembly 101 includes gauge outfit 1, first radio frequency connects 2 and first flange 3, gauge outfit 1 sets up on first flange 3 through first radio frequency joint 2, and first radio frequency connects 2 and passes first flange 3 and 4 end connection of radio frequency cable, survey subassembly 102 includes second radio frequency joint 5, second flange 6 and horn mouth 7, second radio frequency joint 5 and horn mouth 7 set up respectively in the upper and lower tip of second flange 6, and second radio frequency joint 5 and another end connection of radio frequency cable 4, second flange 6 is fixed to be set up on the port flange 201 of storage tank 200.
The gauge outfit 1 sends a group of microwave signals with fixed frequency, the signals are transmitted to the bell mouth 7 through the first radio frequency connector 2, the radio frequency cable 4 and the second radio frequency connector 5, the signals are transmitted through the bell mouth 7, and when the microwaves contact the surface of a measured object, the microwaves are reflected back due to the fact that the dielectric constant changes suddenly. The reflected microwaves return to the gauge head 1 along an opposite path, the time interval between the emission and the reception of the microwaves is in direct proportion to the distance from the gauge head 1 to the measured medium, so that the distance from the gauge head 1 to the surface of the measured medium can be calculated, the distance of the measured object is detected, and then the distance information from the gauge head 1 to the liquid level of the measured object can be obtained after the reciprocating microwave signals are processed and calibrated through a signal processing circuit and control software.
Further, as shown in fig. 3 to 5, a cooling cavity 701 is provided inside the side wall of the bell mouth 7, a flange through hole 601 is provided inside the second flange 6, a pipe assembly 9 is provided in the flange through hole 601, the pipe assembly 9 comprises a water inlet pipe 901, a water outlet pipe 903, a left air inlet pipe 902 and a right air inlet pipe 904, the water inlet pipe 901 and the water outlet pipe 903 are respectively inserted into the flange through holes 601 located on two sides of the bell mouth 7 and are communicated with the cooling cavity 701, the cooling water is introduced to cool the bell mouth 7, the influence of high-temperature gasified products on the detection assembly 102 is reduced, and the detection precision is improved.
Furthermore, the inner wall of the bell mouth 7 is coated with a barium titanate coating, which can enhance the reflection capability of the bell mouth 7 to electromagnetic waves, and the thickness of the barium titanate coating is 3-15mm, preferably 8 mm. Barium titanate is a strong dielectric compound material, has high dielectric constant, and has strong microwave reflectivity on the barium titanate coating, and the reflected signal intensity is high.
In this embodiment, the liquid level meter 100 further includes a purging assembly 8, the purging assembly 8 includes a left communicating pipe 801 and a right communicating pipe 802 respectively disposed on two sides of the bell mouth 7, a left discharge pipe 803 and a right discharge pipe 804 disposed on two sides of the lower portion of the bell mouth 7, and an air nozzle 805 disposed at a bottom end of the bell mouth 7, the left communicating pipe 801 and the right communicating pipe 802 are disposed along an outer wall contour of the bell mouth 7, a left air inlet pipe 902 and a right air inlet pipe 904 are respectively inserted into the flange through holes 601 located on two sides of the bell mouth 7, upper ends of the left communicating pipe 801 and the right communicating pipe 802 are respectively connected to the left air inlet pipe 902 and the right air inlet pipe 904, lower ends of the left communicating pipe 801 and the right communicating pipe 802 are respectively connected to the left discharge pipe 803 and the right discharge pipe 804, the left discharge pipe. Compressed gas respectively enters from a left air inlet pipe 902 and a right air inlet pipe 904, respectively flows into a left discharge pipe 803 and a right discharge pipe 804 through a left communicating pipe 801 and a right communicating pipe 802, respectively sprays out from air nozzles 805 arranged on the left discharge pipe 803 and the right discharge pipe 804, sweeps foam on the liquid level below, blows the foam right below the bell mouth 7 or blows the foam to the outside, reduces the influence of the foam on the liquid level meter 100, and improves the measurement accuracy. The blowing direction of the air nozzle 805 can be controlled by a PLC controller, which is part of the prior art.
Referring to fig. 1 and 6 again, in the present embodiment, the liquid level meter 100 further includes a microwave absorbing assembly 300, the microwave absorbing assembly 300 includes an absorbing bottom plate 301, a pyramid 302 and a hanging lug 303, the absorbing bottom plate 301 is disposed at the bottom of the storage tank 200, and the pyramid 302 is fixedly disposed on the absorbing bottom plate 301. The material of the pyramid 302 is selected to be PTDE material, which has a relative dielectric constant exceeding 1.8, and reference is made to chinese patent CN 1378640A.
A hanging lug 303 for facilitating fishing is arranged on the absorption bottom plate 301. When the microwave absorbing assembly 300 is disassembled, the long rod can be used for hooking the hanging lug 303 on the microwave absorbing assembly 300, so that the microwave absorbing assembly 300 can be conveniently salvaged.
The inner wall of the bottom of the storage tank 200 is fixedly provided with a buckling plate 202, the middle of the buckling plate 202 is provided with an opening space, the inner side of the buckling plate 202 is provided with a groove, the absorption bottom plate 301 is positioned in the opening space, the outer side of the absorption bottom plate is provided with a convex block 304, and the convex block 304 and the groove are mutually matched for clamping connection, so that the installation and the disassembly are convenient.
In summary, the present invention discloses a split type liquid level meter 100, which has the following beneficial effects: through at inside cooling chamber 701 that sets up of horn mouth 7 to let in the cooling water in cooling chamber 701, cool down the cooling to detecting subassembly 102, reduce the influence that high temperature gasification thing produced to detecting subassembly 102, improved and detected the precision. Through set up on horn mouth 7 and sweep subassembly 8, sweep subassembly 8 and can realize that left side sweeps or right side sweeps, and gas blows out from air cock 805, sweeps the foam on the liquid level below, blows the foam under horn mouth 7 or blows to the outside, has reduced the influence of foam to level gauge 100 detection precision. At storage tank 200 bottom installation microwave absorption assembly 300, microwave absorption assembly 300 has pyramid 302, and the microwave that radar level gauge 100 sent to the tank bottoms that pyramid 302 can be fine has greatly reduced the interference that the echo that the tank bottoms produced caused, has improved measurement accuracy. Set up buckling board 202 at the tank bottoms, buckling board 202 carries out the block with microwave absorption subassembly 300 and is connected, makes things convenient for microwave absorption subassembly 300's dismantlement, and when dismantling, the hangers 303 on microwave absorption subassembly 300 is caught to usable stock, conveniently salvages.
The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.
Claims (8)
1. A split type liquid level meter is characterized by comprising a probe assembly, a detection assembly and a radio frequency cable, wherein the probe assembly comprises a meter head, a first radio frequency connector and a first flange, the meter head is arranged on the first flange through the first radio frequency connector, the first radio frequency connector penetrates through the first flange and is connected with one end of the radio frequency cable, the detection assembly comprises a second radio frequency connector, a second flange and a horn mouth, the second radio frequency connector and the horn mouth are respectively arranged at the upper end part and the lower end part of the second flange, and the second radio frequency connector is connected with the other end of the radio frequency cable;
the second flange is fixedly arranged on a port flange of the storage tank, a cooling cavity is formed in the side wall of the horn mouth, a flange through hole is formed in the second flange, a pipe assembly is arranged in the flange through hole, and the pipe assembly is communicated with the cooling cavity and used for introducing cooling water to cool the horn mouth.
2. The split-type liquid level gauge according to claim 1, wherein the tube assembly comprises a water inlet tube and a water outlet tube, the water inlet tube and the water outlet tube are respectively inserted into the flange through holes at two sides of the bell mouth, and are both communicated with the cooling cavity.
3. The split type liquid level meter according to claim 1, further comprising a purging component, wherein the purging component comprises a left communicating pipe and a right communicating pipe respectively disposed at two sides of the horn mouth, a left exhaust pipe and a right exhaust pipe disposed at two sides of the lower portion of the horn mouth, and an air nozzle disposed at the bottom end portion of the horn mouth, the pipe component further comprises a left intake pipe and a right intake pipe, the left intake pipe and the right intake pipe are respectively inserted into the flange through holes at two sides of the horn mouth, the upper end portions of the left communicating pipe and the right communicating pipe are respectively connected with the left intake pipe and the right intake pipe, the lower end portions of the left communicating pipe and the right communicating pipe are respectively connected with the left exhaust pipe and the right exhaust pipe, and the left exhaust pipe and the right exhaust pipe are.
4. The split type liquid level gauge of claim 3, wherein the left communicating pipe and the right communicating pipe are arranged along the contour of the outer wall of the bell mouth.
5. The split level gauge of claim 3, wherein the air cap is a steerable flat air cap.
6. The split-type liquid level gauge according to claim 1, further comprising a microwave absorption assembly, wherein the microwave absorption assembly comprises an absorption bottom plate arranged at the bottom of the storage tank, a pyramid fixedly arranged on the absorption bottom plate, and a hanging lug arranged on the absorption bottom plate for facilitating fishing.
7. The split type liquid level gauge of claim 6, wherein a fastening plate is fixedly arranged on the inner wall of the bottom of the storage tank, the fastening plate has an opening space in the middle and a groove in the inner side, the absorption base plate is located in the opening space and has a protrusion on the outer side, and the protrusion and the groove are mutually matched for clamping connection.
8. The split level gauge of claim 1, wherein the inner wall of the bell mouth is coated with a barium titanate coating, and the thickness of the barium titanate coating is 3-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630353.5A CN111811612A (en) | 2020-07-01 | 2020-07-01 | Split type level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010630353.5A CN111811612A (en) | 2020-07-01 | 2020-07-01 | Split type level gauge |
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| Publication Number | Publication Date |
|---|---|
| CN111811612A true CN111811612A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010630353.5A Pending CN111811612A (en) | 2020-07-01 | 2020-07-01 | Split type level gauge |
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| CN (1) | CN111811612A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203454A (en) * | 2021-05-17 | 2021-08-03 | 江苏核电有限公司 | Rapid calibration device and method for split type guided wave radar liquid level meter |
-
2020
- 2020-07-01 CN CN202010630353.5A patent/CN111811612A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203454A (en) * | 2021-05-17 | 2021-08-03 | 江苏核电有限公司 | Rapid calibration device and method for split type guided wave radar liquid level meter |
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