CN112945350A - Radio frequency admittance flat-plate type level sensor - Google Patents
Radio frequency admittance flat-plate type level sensor Download PDFInfo
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- CN112945350A CN112945350A CN202110135852.1A CN202110135852A CN112945350A CN 112945350 A CN112945350 A CN 112945350A CN 202110135852 A CN202110135852 A CN 202110135852A CN 112945350 A CN112945350 A CN 112945350A
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- radio frequency
- flat
- connecting pipe
- pole connecting
- electrode
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- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- 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
Abstract
The invention relates to a radio frequency admittance flat-plate type level sensor, in particular to the technical field of the sensor, which comprises a measuring pole connecting rod, a shielding pole connecting pipe and a ground pole connecting pipe, wherein the measuring pole connecting rod, the shielding pole connecting pipe and the ground pole connecting pipe are coaxially arranged from inside to outside; the device also comprises a flat radio frequency measuring electrode, a flat radio frequency shielding electrode and a flat radio frequency ground electrode, wherein a small insulating layer is arranged between the flat radio frequency measuring electrode and the flat radio frequency shielding electrode, a large insulating layer is arranged between the flat radio frequency shielding electrode and the flat radio frequency ground electrode, and an O-shaped sealing ring is arranged between the flat radio frequency measuring electrode, the small insulating layer, the flat radio frequency shielding electrode, the large insulating layer and the flat radio frequency ground electrode. The invention has the technical effect of being particularly suitable for large lump materials and wear-resistant occasions.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a radio frequency admittance flat-plate type level sensor.
Background
The radio frequency admittance level switch senses the change of reactance between the radio frequency admittance level switch and the storage tank body through the probe to realize level measurement and control. The radio frequency admittance level switch mainly comprises an electronic unit and a sensor. The most commonly used is a rod sensor, but in the case of large materials, a rod probe cannot be impacted by the material block, and the rod is easily deformed, bent or broken, so that a new type of sensor is required to replace the rod sensor. The principle of the flat plate type radio frequency admittance sensor is the same as that of a rod type sensor, and the flat plate type radio frequency admittance sensor comprises a measuring electrode, a shielding electrode and a grounding electrode. However, three poles of the flat plate are arranged on a large plane, the contact surface is greatly increased, the strength is good, and the flat plate type steel plate is very suitable for large block materials and wear-resistant occasions.
The above prior art solutions have the following drawbacks: the prior art rf admittance level switches are relatively susceptible to wear by the bulk material.
Disclosure of Invention
The invention aims to provide a radio frequency admittance flat-plate type level sensor, which has the advantages that the structure of the sensor is changed, a rod type is changed into a flat plate type, the contact area and the strength are increased, and the radio frequency admittance flat-plate type level sensor is particularly suitable for large lump materials and wear-resistant occasions.
The above object of the present invention is achieved by the following technical solutions:
a radio frequency admittance flat plate type level sensor comprises a measuring pole connecting rod, a shielding pole connecting pipe and a ground pole connecting pipe, wherein the measuring pole connecting rod, the shielding pole connecting pipe and the ground pole connecting pipe are coaxially arranged from inside to outside;
the device also comprises a flat radio frequency measuring electrode, a flat radio frequency shielding electrode and a flat radio frequency ground electrode, wherein a small insulating layer is arranged between the flat radio frequency measuring electrode and the flat radio frequency shielding electrode, a large insulating layer is arranged between the flat radio frequency shielding electrode and the flat radio frequency ground electrode, and an O-shaped sealing ring is arranged between the flat radio frequency measuring electrode, the small insulating layer, the flat radio frequency shielding electrode, the large insulating layer and the flat radio frequency ground electrode;
the bottom end of the measuring pole connecting rod is welded with the flat radio frequency measuring pole, the shield pole connecting pipe is welded with the flat radio frequency shield pole, and the ground pole connecting pipe is welded with the flat radio frequency ground pole.
Preferably, a first insulation mechanism is arranged between the side wall of the top end of the shield pole connecting pipe and the top end of the ground pole connecting pipe, and a second insulation mechanism is arranged between the side wall of the top end of the measuring pole connecting rod and the top end of the shield pole connecting pipe.
Preferably, the first insulating mechanism comprises a thread on the outer side of the top end of the shielded pole connecting pipe, a large plastic washer and a large compression nut, the large plastic washer is sleeved between the outer side of the shielded pole connecting pipe and the top end of the ground pole connecting pipe, and the large compression nut is screwed with the thread on the outer side of the shielded pole connecting pipe and compresses the large plastic washer;
the second insulating mechanism comprises a thread on the outer side of the top end of the measuring pole connecting rod, a small plastic washer and a small compression nut, the small plastic washer is sleeved between the outer side of the measuring pole connecting rod and the top end of the shield pole connecting pipe, and the small compression nut and the thread on the outer side of the measuring pole connecting rod are screwed and compress the large plastic washer.
Preferably, the welding is performed by argon arc welding.
Preferably, the cross section of the O-shaped sealing ring is circular.
In conclusion, the invention has the beneficial effects that:
the novel flat plate type radio frequency admittance sensor is designed, the structure of the sensor is changed, a rod type is changed into a flat plate type, the contact area and the strength are increased, and the flat plate type radio frequency admittance sensor is particularly suitable for large lump materials and wear-resistant occasions.
The novel flat plate type radio frequency admittance sensor can change the drift diameter according to the requirements of users, can meet the requirements of the users by adjusting the lengths of relevant parts such as a ground electrode connecting pipe, a shield electrode connecting pipe and a measuring electrode connecting pipe on the site with a vertical pipe, changes the trouble that a flat plate probe is fixed and does not change to open a hole on a tank body on the market, and has a novel structure which is more favorable for the actual use site and is more flexible and convenient.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
The marks in the figure are respectively 1 and a measuring pole connecting rod; 2. a shield electrode connecting pipe; 3. a ground pole connecting pipe; 4. an insulating material; 5. welding a flange by using a flat plate radio frequency; 6. a flat plate radio frequency measurement electrode; 7. a flat plate radio frequency shield; 8. a flat radio frequency ground; 9. a small insulating layer; 10. a large insulating layer; 11. an O-shaped sealing ring; 12. a first insulating mechanism; 121. a large plastic washer; 122. a large compression nut; 13. a second insulating mechanism; 131. a small plastic washer; 132. and (5) a small compression nut.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a radio frequency admittance flat-plate type level sensor comprises a measuring pole connecting rod 1, a shield pole connecting pipe 2 and a ground pole connecting pipe 3, wherein the measuring pole connecting rod 1, the shield pole connecting pipe 2 and the ground pole connecting pipe 3 are coaxially arranged from inside to outside, the measuring pole connecting rod 1, the shield pole connecting pipe 2 and the ground pole connecting pipe 3 are filled with an insulating material 4, a flat radio frequency welding flange 5 is arranged on the outer wall of the top end of the ground pole connecting pipe 3, and the measuring pole connecting rod 1, the shield pole connecting pipe 2 and the ground pole connecting pipe 3 are connected with an electronic unit;
the device is characterized by further comprising a flat radio frequency measuring electrode 6, a flat radio frequency shielding electrode 7 and a flat radio frequency ground electrode 8, wherein a small insulating layer 9 is arranged between the flat radio frequency measuring electrode 6 and the flat radio frequency shielding electrode 7, a large insulating layer 10 is arranged between the flat radio frequency shielding electrode 7 and the flat radio frequency ground electrode 8, and an O-shaped sealing ring 11 is arranged between the flat radio frequency measuring electrode 6, the small insulating layer 9, the flat radio frequency shielding electrode 7, the large insulating layer 10 and the flat radio frequency ground electrode 8;
the bottom end of the measuring pole connecting rod 1 is welded with the flat radio frequency measuring pole 6, the shield pole connecting pipe 2 is welded with the flat radio frequency shield pole 7, and the ground pole connecting pipe 3 is welded with the flat radio frequency ground pole 8.
The working mode is as follows: the diameters of the flat radio frequency measuring electrode 6, the flat radio frequency shielding electrode 7 and the flat radio frequency ground electrode 8 can be adjusted correspondingly according to user requirements, DN100 flange installation can be met at minimum, and the length of the measuring electrode connecting rod 1 and the shielding electrode connecting pipe 2 and the ground electrode connecting pipe 3 can be adjusted to meet different riser heights of field users.
Set up first insulating mechanism 12 between 2 top lateral walls of shield pole connecting pipe and the 3 tops of ground pole connecting pipe, set up second insulating mechanism 13 between 1 top lateral wall of measurement utmost point connecting rod and 2 tops of shield pole connecting pipe.
The first insulation mechanism 12 comprises a thread on the outer side of the top end of the shield pole connecting pipe 2, a large plastic washer 121 and a large compression nut 122, the large plastic washer 121 is sleeved between the outer side of the shield pole connecting pipe 2 and the top end of the ground pole connecting pipe 3, and the large compression nut 122 is screwed with the thread on the outer side of the shield pole connecting pipe 2 and compresses the large plastic washer 121; the second insulating mechanism 13 includes a thread on the outer side of the top end of the measuring pole connecting rod 1, a small plastic washer 131 and a small compression nut 132, the small plastic washer 131 is sleeved between the outer side of the measuring pole connecting rod 1 and the top end of the shield pole connecting pipe 2, and the thread on the outer side of the small compression nut 132 and the measuring pole connecting rod 1 is screwed and compresses the large plastic washer 121. By adopting the insulating structure, the insulating effect among the three electrodes can be better.
The welding adopts argon arc welding, uses argon arc welding's mode between the interconnect, has guaranteed its leakproofness and intensity.
The cross section of the O-shaped sealing ring is circular, and the sealing ring can be used for realizing simple sealing and reliable sealing.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A radio frequency admittance flat-plate level sensor, characterized by: the device comprises a measuring pole connecting rod (1), a shielding pole connecting pipe (2) and a ground pole connecting pipe (3), wherein the measuring pole connecting rod (1), the shielding pole connecting pipe (2) and the ground pole connecting pipe (3) are coaxially arranged from inside to outside, insulating materials (4) are filled among the measuring pole connecting rod (1), the shielding pole connecting pipe (2) and the ground pole connecting pipe (3), a flat radio frequency welding flange (5) is arranged on the outer wall of the top end of the ground pole connecting pipe (3), and the measuring pole connecting rod (1), the shielding pole connecting pipe (2) and the ground pole connecting pipe (3) are connected with an electronic unit;
the device is characterized by further comprising a flat radio frequency measuring electrode (6), a flat radio frequency shielding electrode (7) and a flat radio frequency ground electrode (8), wherein a small insulating layer (9) is arranged between the flat radio frequency measuring electrode (6) and the flat radio frequency shielding electrode (7), a large insulating layer (10) is arranged between the flat radio frequency shielding electrode (7) and the flat radio frequency ground electrode (8), and an O-shaped sealing ring (11) is arranged between the flat radio frequency measuring electrode (6), the small insulating layer (9), the flat radio frequency shielding electrode (7), the large insulating layer (10) and the flat radio frequency ground electrode (8);
the measuring electrode connecting rod (1) is welded between the bottom end and the flat radio frequency measuring electrode (6), the shielding electrode connecting pipe (2) is welded with the flat radio frequency shielding electrode (7), and the ground electrode connecting pipe (3) is welded with the flat radio frequency ground electrode (8).
2. The radio frequency admittance flat-panel level sensor of claim 1, wherein: set up first insulating mechanism (12) between shield utmost point connecting pipe (2) top lateral wall and ground connection pipe (3) top, set up second insulating mechanism (13) between measurement utmost point connecting rod (1) top lateral wall and shield utmost point connecting pipe (2) top.
3. The radio frequency admittance flat-panel level sensor of claim 2, wherein: the first insulation mechanism (12) comprises a thread on the outer side of the top end of the shielded pole connecting pipe (2), a large plastic washer (121) and a large compression nut (122), the large plastic washer (121) is sleeved between the outer side of the shielded pole connecting pipe (2) and the top end of the ground pole connecting pipe (3), and the large compression nut (122) is screwed with the thread on the outer side of the shielded pole connecting pipe (2) and compresses the large plastic washer (121);
second insulating mechanism (13) are including measuring screw thread and little plastic washer (131) and little gland nut (132) on utmost point connecting rod (1) top outside, little plastic washer (131) cover is established and is measured between utmost point connecting rod (1) outside and shield pole connecting pipe (2) top, the screw thread in little gland nut (132) and the utmost point connecting rod (1) outside of measuring connects soon and compresses tightly big plastic washer (121).
4. The radio frequency admittance flat-panel level sensor of claim 3, wherein: the welding adopts argon arc welding.
5. The radio frequency admittance flat-panel level sensor of claim 4, wherein: the cross section of the O-shaped sealing ring is circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110135852.1A CN112945350A (en) | 2021-02-01 | 2021-02-01 | Radio frequency admittance flat-plate type level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110135852.1A CN112945350A (en) | 2021-02-01 | 2021-02-01 | Radio frequency admittance flat-plate type level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112945350A true CN112945350A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110135852.1A Pending CN112945350A (en) | 2021-02-01 | 2021-02-01 | Radio frequency admittance flat-plate type level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112945350A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200947051Y (en) * | 2006-08-14 | 2007-09-12 | 黑龙江省中贝技术有限公司 | Flat-type digital intelligent charge level indicator |
| CN206756260U (en) * | 2017-01-17 | 2017-12-15 | 天津菲特测控仪器有限公司 | A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP |
| CN207379970U (en) * | 2017-10-26 | 2018-05-18 | 天津恒立远大仪表股份有限公司 | A kind of sensor structure of radio frequency admittance analyzer of water content |
| US20190310125A1 (en) * | 2017-11-14 | 2019-10-10 | Rochester Gauges, Inc. | TDR Transducer with Boomerang Waveguide |
-
2021
- 2021-02-01 CN CN202110135852.1A patent/CN112945350A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200947051Y (en) * | 2006-08-14 | 2007-09-12 | 黑龙江省中贝技术有限公司 | Flat-type digital intelligent charge level indicator |
| CN206756260U (en) * | 2017-01-17 | 2017-12-15 | 天津菲特测控仪器有限公司 | A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP |
| CN207379970U (en) * | 2017-10-26 | 2018-05-18 | 天津恒立远大仪表股份有限公司 | A kind of sensor structure of radio frequency admittance analyzer of water content |
| US20190310125A1 (en) * | 2017-11-14 | 2019-10-10 | Rochester Gauges, Inc. | TDR Transducer with Boomerang Waveguide |
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