CN206756260U - A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP - Google Patents
A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP Download PDFInfo
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- CN206756260U CN206756260U CN201720065759.7U CN201720065759U CN206756260U CN 206756260 U CN206756260 U CN 206756260U CN 201720065759 U CN201720065759 U CN 201720065759U CN 206756260 U CN206756260 U CN 206756260U
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Abstract
The utility model provides a kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP, includes the sensor outer housing as earth polar, the intermediate layer electrode as active shielding pole, inside center electrode, the insulating oxide zircon ceramic ring for electrical isolation and its supporting seal washer as sensing pole successively from outside to inside；Sensor outer housing lower end is connected with sealing base under earth polar, intermediate layer electrode includes bucking electrode terminals, bucking electrode connector and shielding connecting tube, it is cased with shielding earth polar isolated tube between shielding connecting tube and sensor outer housing, central electrode includes the sensor electrode terminals, sensing electrode connector and sensing pole part being from top to bottom sequentially connected, and sensing shielding isolated tube is provided between central electrode and shielding connecting tube；The beneficial effects of the utility model are：Sensor temperature and pressure use range is greatly improved in the use of zirconia ceramics, has the characteristics that good maintenance-free and processing request are relatively low, is easy to large-scale production.
Description
Technical field
Sensing equipment technical field is the utility model is related to, more particularly, to a kind of radio frequency admittance suitable for HTHP
Formula level meter sensor.
Background technology
At present, level gauging technology has varied, wherein capacitance object position e measurement technology bag in industrial automation
The radio frequency admittance technology being derived on its basis is included, its sensor is put among material, is adapted to wider temperature
Pressure application, high with its reliability, measurement is stable to be accurately good at.
Capacitive level probe in actual applications, an electrode of sensor inherently electric capacity, and another pole of electric capacity
Be then the conductive material contacted with material container wall on the outside of material container wall or sensor in itself, must be absolutely between two electrodes
Edge, the electric capacity so formed is directly proportional to thing position, and capacitive level probe measures this electric capacity using radiofrequency signal, and then measures thing
Position.
With the raising and environmental protection requirement of National Industrial automatization level and the raising of consciousness, set in gauge sensor
The sensor safe requirement of timing, particularly HTHP application must be primary.Sensor is usually use with PTFE
(Polytetrafluoroethylene) polytetrafluoroethylene (PTFE) is the soft engineering insulating materials of representative, apply it is bigger it is pre- should
Power has the function that sealing and electric electrode insulation, and the shortcomings that its is obvious is exactly not to be resistant to powerful container pressure and work
Temperature can not be more than or close to the continuous resistance to hot(test)-spot temperature of engineering insulating materials.Then technical staff transfers to use aluminum oxide high frequency porcelain
As insulating materials between electrode, the temperature in use of sensor can reach about 800 DEG C, but aluminum oxide high frequency porcelain sintered part size
Precision is low, and quality is crisp, frangible, it is impossible to bears larger sealing prestressing force and harsh transport and use environment, therefore can not use
In the sensor for being resistant to larger pressure.Therefore designer always searches for a kind of insulating materials, to design the sensing of energy
Device.
As can be seen here, a kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP how is worked out, it is isolated
The insulating materials of layer has the characteristics of not only high temperature resistant is again strong but pliable in texture, and then assigns the sensor larger pressure of tolerance and higher temperature
Advantage, be current those skilled in the art's urgent problem to be solved.
The content of the invention
In order to solve the above problems, the utility model provides a kind of Radio Frequency Admittance Material Level Meter suitable for HTHP
Sensor.
A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP of the utility model, includes successively from outside to inside
Sensor outer housing as earth polar, the intermediate layer electrode as active shielding pole and same with the intermediate layer electrode same-phase
The inside center electrode as sensing pole of current potential, the sensor outer housing lower end is sealedly connected with sealing base under earth polar, institute
State intermediate layer electrode include bucking electrode terminals, the bucking electrode connector that is fixedly connected with the bucking electrode terminals with
And the shielding connecting tube being fixedly connected with the bucking electrode connector, between the shielding connecting tube and the sensor outer housing
Provided with shielding earth polar isolated tube, the central electrode includes sensor electrode terminals, the sensing electricity being from top to bottom sequentially connected
Pole connector and sensing pole part, sensing shielding isolated tube is provided between the central electrode and the shielding connecting tube.
It is provided with that sensor is locked component and sensing goes up sealing base, the sensing on the outside of the sensing electrode connector
Locking saddle gasket assembly is provided between device latch assembly and the sensor sealing base, in the sensing under sealing base
End is from top to bottom sequentially provided with the upper sealing base of shielding on the outside of the target, is close under sealing base, shielding on earth polar
Seal sealing base under pedestal and earth polar.
Sealing base upper end in sealing base lower end and the shielding, sealing base lower end in the shielding in the sensing
With sealing base upper surface under sealing base lower surface under sealing base upper end, the shielding on the earth polar and the earth polar with
And offer closure gasket groove, the sealing between sealing base upper surface and the sensing pole lower face under the earth polar
Seal washer is installed in annular groove, is tightly fixed with by inserting mode for isolating institute between two seal washers
State the zirconia ceramics ring of sensor outer housing, the intermediate layer electrode and the central electrode.
Further, when the operating temperature of sensor is higher than 300 DEG C, the material of the seal washer is copper, graphite, glass
One or more in glass fiber or Steel material.
Further, when the operating temperature of sensor is less than 300 DEG C, the material of the seal washer is engineering plastics.
Further, the sensor outer housing excircle side offers the screw thread for being connected with testing container, institute
State sealing base excircle side on earth polar and offer screw thread for being connected with meter housing.
Further, the bucking electrode terminals and the bucking electrode connector are the electric of the intermediate layer electrode
Connection end, the sensing electrode terminals and the sensing electrode connector are the electrical connection terminal of the central electrode.
A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP of the utility model, has compared with prior art
Have the advantage that：
First, should be suitable for the Radio Frequency Admittance Material Level Meter sensor of HTHP because using zirconia ceramics as three
The separation layer of individual electrode, make not influence each other between three electrodes, be finally completed measurement.Using zirconia ceramics ring as core, with reference to
Supporting seal washer, apply larger prestressing force, be pressed together, form the reinforcing and sealing of sensor in itself, make sensor
Physical aspect and electrical relation are unaffected at high temperature under high pressure, ensure that sensor completes the measurement of parameter.
Second, the separation layer also has the advantage that：First, because zirconia ceramics has high temperature resistant, high voltage bearing feature, institute
To substantially increase the temperature in use of sensor and upper limit of pressure；Secondly, the zirconia ceramics that the design uses, because its is hard
Degree is high, can apply very big prestressing force, can greatly improve sensor sealability, substantially reduces the wind of sensor leakage
Danger, so improving sensor reliability and maintenance-free；Again, it is non-breakable because zirconia ceramics toughness is high, put significantly
Requirement of the pine to scene vibrations, the requirement to Product transport and installation is relaxed, has expanded products application scope, also ensures production
The security of product and environment；Finally, due to the dimensional accuracy of zirconia ceramics intermetallic composite coating rank and with stainless steel similar in temperature
Coefficient is spent, therefore the tolerance fit of 0.1mm ranks can be selected, the assembly precision of big large sensor, degree of precision convenient to carry out
Sealing cooperation and pressure support coordinate, substantially increase the voltage endurance capability of sensor, ensure the security of product.
3rd, it is somebody's turn to do sensor outer housing, intermediate layer electricity suitable for the Radio Frequency Admittance Material Level Meter sensor of HTHP
Connected between pole and target for tubular type, therefore improve electric signal conduction efficiency, can effectively avoid excessive heat from conducting
To the electronic module end of sensor upper end.And the sensor is locked, component is the fixing seal prestressing force of whole sensor
Supplier, the locking saddle shim pack is then by this prestressing force softening, and ensured sustained development, so as to avoid temperature change to zero
The influence of part axial dimension causes to seal prestressed reduction.
Brief description of the drawings
Fig. 1 is sectional view of the present utility model.
In figure：1st, bucking electrode terminals, 2, bucking electrode connector, 3, sensing electrode terminals, 4, sensing electrode connects
Fitting, 5, sensor be locked component, 6, locking saddle gasket assembly, 7, sealing base in sensing, 8, seal washer, 9, oxygen
Change zircon ceramic ring, 10, the upper sealing base of shielding, 11, sensing shielding isolated tube, 12, sealing base on earth polar, 13, shield and connect
Pipe, 14, shielding polar region isolated tube；15th, lower sealing base is shielded, 16, sealing base under earth polar, 17, sensing pole part.
Embodiment
In order to be better understood from the utility model, enter traveling one to the utility model with reference to specific embodiments and the drawings
The description of step.
As shown in figure 1, a kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP, including for live tank
The earth polar of body connection, an i.e. described intermediate layer electrode of active shielding electrode for being used for ensureing small capacitance signal measurement, is passed
Sensor center is used for the i.e. described central electrode of sensing electrode that measures, insulating oxide zircon ceramic ring 9 for electrical isolation and its
Supporting seal washer 8.
The earth polar refers to sensor outer housing, generally is configured with installing screw thread or mounting flange, for sensor to be installed
To the container for example on tank of user's material to be measured, the container is located on ground, is being electrically ground connection, therefore described
Earth polar is by as testing capacitance variable electrode.
It with the sensing electrode is being electrically that same-phase is idiostatic that the active shielding electrode, which is, so with it is described
Sensing electrode does not just have potential difference, therefore does not just become charge collection and electric capacity yet, so as to ensure the survey of small capacitance signal
Amount.
The sensing electrode is connection Electron Excitation and signal amplification circuit and another electrode of container internal capacitance, passes through survey
The electric capacity between sensing electrode and earth polar is measured, thing position information inside container can be derived.
The insulating oxide zircon ceramic ring 9 of the electrical isolation is key of the present utility model, it be for electrically every
From three electrodes, make not influence each other between three electrodes, be finally completed measurement, and be core with the zirconia ceramics ring 9,
With reference to supporting seal washer 8, apply larger prestressing force, be pressed together, form the reinforcing of itself and sealing of sensor, make
Physical aspect and electrical relation are unaffected at high temperature under high pressure for sensor, ensure that sensor completes the measurement of parameter.
The seal washer 8 is typically made up of copper, graphite, glass fibre or Steel material one or more material, if warm
Degree is required below 300 DEG C, it is possible to use the material based on some engineering plastics, therefore can be simultaneous according to scene temperature and chemistry
Capacitive requirement, selects the different materials of flexible seal washer 8, to improve sensor sealability.
On concrete form, the utility model is the body structure portion of Radio Frequency Admittance Material Level Meter sensor, and it is sensed
The generation position electric capacity of pole part 17, and the radiofrequency signal of conduction measurement electric capacity.The all tubular type connections in the end of sensor internal three,
Its main function is electric signal conduction, and excessive heat can be avoided to be transmitted to electronic module end above.
Wherein, the bucking electrode terminals 1, the bucking electrode connector 2, the sensing electrode terminals 3 and institute
State the electrical connection terminal that sensing electrode connector 4 is bucking electrode and sensing electrode respectively.
The sensor be locked component 5 be whole sensor the prestressed supplier of fixing seal, it is and described anti-
Loose saddle shim pack 6 is then by this prestressing force softening, and ensured sustained development, so as to without worrying temperature change to parts axial direction chi
Very little influence brings the prestressed reduction of sealing.
Sealing base 10 carries closure gasket groove in sealing base 7 and the shielding in the sensing, and the seal washer 8 is pacified
In this closure gasket groove, the zirconia ceramics ring 9 is compressed tightly against both sides by the fixing seal prestressing force of sensor
The seal washer 8, therefore the electrode isolation for forming sensor is fixed.
Equally, sealing base 12 on sealing base 10 and earth polar in the shielding, and the fixing seal for passing through sensor
The seal washer 8 and the zirconia ceramics ring 9 are tightly held in together by prestressing force.
Similar, shield sealing base 16 and sensing pole part 17 under lower sealing base 15, earth polar and pass through sensor
Fixing seal prestressing force the seal washer 8 and the zirconia ceramics ring 9 are tightly held in together, only, this
Three parts be arranged on inside container, it is necessary in face of container pressure, therefore they are the main bodys of sensor sealing.
In sensor internal, the sensing shielding isolated tube 11 and the shielding earth polar isolated tube 14, three ends are surveyed respectively
Amount electrode structure is kept apart.The pedestal of each electrode is tightly compressed by the seal washer 8 and the zirconia ceramics ring 9
Together, the sealing of the sensor is formed with this.
Embodiment of the present utility model is described in detail above, but the content is only of the present utility model preferable
Embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.All impartial changes made according to the scope of the utility model
Change and improvement etc., all should still be belonged within this patent covering scope.
Claims (5)
- A kind of 1. Radio Frequency Admittance Material Level Meter sensor suitable for HTHP, it is characterised in that：Include successively from outside to inside Sensor outer housing as earth polar, the intermediate layer electrode as active shielding pole and same with the intermediate layer electrode same-phase The inside center electrode as sensing pole of current potential, the sensor outer housing lower end is sealedly connected with sealing base under earth polar (16) the shielding electricity that, the intermediate layer electrode includes bucking electrode terminals (1), is fixedly connected with the bucking electrode terminals Pole connector (2) and the shielding connecting tube (13) being fixedly connected with the bucking electrode connector (2), the shielding connecting tube (13) shielding earth polar isolated tube (14) is provided between the sensor outer housing, the central electrode includes from top to bottom phase successively Even sensor electrode terminals (3), sensing electrode connector (4) and sense pole part (17), the central electrode with it is described Sensing shielding isolated tube (11) is provided between shielding connecting tube (13)；Sensor is provided with the outside of the sensing electrode connector (4) it is locked and component (5) and senses and go up sealing base (7), institute State and locking saddle gasket assembly (6) is provided between sensor latch assembly (5) and the sensor sealing base (7), it is described In sensing sealing base (7) lower end be located on the outside of the target be from top to bottom sequentially provided with the upper sealing base (10) of shielding, Sealing base (16) under sealing base (12), the lower sealing base (15) of shielding and earth polar on earth polar；Sealing base (10) upper end in sealing base (7) lower end and the shielding, sealing base in the shielding in the sensing (10) on lower end and the earth polar under sealing base (12) upper end, the shielding under sealing base (15) lower surface and the earth polar Sealing base (16) upper surface and described sensing pole part (17) lower surface under sealing base (16) upper surface and the earth polar Between offer closure gasket groove, seal washer (8) is installed, positioned at two seal washers (8) in the closure gasket groove Between be tightly fixed with by inserting mode for isolating the sensor outer housing, the intermediate layer electrode and the central electrode Zirconia ceramics ring (9).
- 2. the Radio Frequency Admittance Material Level Meter sensor according to claim 1 suitable for HTHP, it is characterised in that：When When the operating temperature of sensor is higher than 300 DEG C, the material of the seal washer (8) is in copper, graphite, glass fibre or Steel material One or more.
- 3. the Radio Frequency Admittance Material Level Meter sensor according to claim 1 suitable for HTHP, it is characterised in that：When When the operating temperature of sensor is less than 300 DEG C, the material of the seal washer (8) is engineering plastics.
- 4. the Radio Frequency Admittance Material Level Meter sensor according to claim 1 suitable for HTHP, it is characterised in that：Institute State sensor outer housing excircle side and offer screw thread for being connected with testing container, sealing base (12) on the earth polar Excircle side offers the screw thread for being connected with meter housing.
- 5. the Radio Frequency Admittance Material Level Meter sensor suitable for HTHP according to any one in claim 1-4, It is characterized in that：The bucking electrode terminals (1) and the bucking electrode connector (2) are the electric of the intermediate layer electrode Connection end, the sensing electrode terminals (3) and the sensing electrode connector (4) are the electrical connection of the central electrode End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720065759.7U CN206756260U (en) | 2017-01-17 | 2017-01-17 | A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720065759.7U CN206756260U (en) | 2017-01-17 | 2017-01-17 | A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP |
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| Publication Number | Publication Date |
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| CN206756260U true CN206756260U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720065759.7U Active CN206756260U (en) | 2017-01-17 | 2017-01-17 | A kind of Radio Frequency Admittance Material Level Meter sensor suitable for HTHP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267191A (en) * | 2017-12-25 | 2018-07-10 | 北京航天计量测试技术研究所 | A kind of measuring probe of high temperature high voltage resistant irradiation |
| CN112945350A (en) * | 2021-02-01 | 2021-06-11 | 重庆四联测控技术有限公司 | Radio frequency admittance flat-plate type level sensor |
-
2017
- 2017-01-17 CN CN201720065759.7U patent/CN206756260U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267191A (en) * | 2017-12-25 | 2018-07-10 | 北京航天计量测试技术研究所 | A kind of measuring probe of high temperature high voltage resistant irradiation |
| CN112945350A (en) * | 2021-02-01 | 2021-06-11 | 重庆四联测控技术有限公司 | Radio frequency admittance flat-plate type level sensor |
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