CN112666525A - Probe assembly of coaxial guided wave radar and coaxial guided wave radar - Google Patents
Probe assembly of coaxial guided wave radar and coaxial guided wave radar Download PDFInfo
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- CN112666525A CN112666525A CN202110103646.2A CN202110103646A CN112666525A CN 112666525 A CN112666525 A CN 112666525A CN 202110103646 A CN202110103646 A CN 202110103646A CN 112666525 A CN112666525 A CN 112666525A
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- 239000004020 conductor Substances 0.000 claims abstract description 104
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The present disclosure provides a probe assembly of a coaxial type guided wave radar, including: a center conductor for guiding an electromagnetic wave generated by the coaxial type guided wave radar to be emitted and guiding a returned electromagnetic wave; the outer wall pipe is sleeved outside the central conductor, and the central conductor and the outer wall pipe have the same extension direction; and the insulation support part is made of an insulation material, the insulation support part is arranged between the central conductor and the outer wall pipe so as to insulate the central conductor from the outer wall pipe, and the insulation support part enables a continuous channel to be formed between the central conductor and the outer wall pipe along the extension direction of the central conductor, and the continuous channel can be passed through by liquid. The present disclosure also provides a coaxial guided wave radar.
Description
Technical Field
The utility model belongs to the technical field of the guided wave radar, this disclosure especially relates to a probe subassembly and coaxial type guided wave radar of coaxial type guided wave radar.
Background
The size of the outer pipe of the coaxial guided wave radar in the prior art is 20mm at least, namely if the size of the opening of the measured container on site is less than 20mm, the measurement cannot be carried out by using the coaxial guided wave radar.
For example, some small high-pressure tanks have substantially smaller opening sizes, which limits the use of coaxial guided wave radars.
The coaxial type guided wave radar in the prior art usually uses low dielectric constant plastics or ceramics as a support, and the structure of the support in the prior art causes discontinuity of wave impedance, so that a reflected wave is formed, and low dielectric constant liquid cannot be measured.
The intensity of the liquid reflection echo is required to be greater than the intensity of the reflection echo generated by the support.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a probe assembly of a coaxial type guided wave radar and a coaxial type guided wave radar.
The probe assembly of the coaxial guided wave radar and the coaxial guided wave radar are realized through the following technical scheme.
According to an aspect of the present disclosure, there is provided a probe assembly of a coaxial type guided wave radar, including:
a center conductor for guiding an electromagnetic wave generated by the coaxial type guided wave radar to be emitted and guiding a returned electromagnetic wave;
the outer wall pipe is sleeved outside the central conductor, and the central conductor and the outer wall pipe have the same extension direction; and
an insulation support made of an insulating material, the insulation support being disposed between the center conductor and the outer-wall tube to insulate between the center conductor and the outer-wall tube, the insulation support being continuous along a direction of extension of the center conductor and a direction of extension of the outer-wall tube, the insulation support being such that a continuous channel is formed between the center conductor and the outer-wall tube along the direction of extension of the center conductor, the continuous channel being capable of being passed through by a liquid.
According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, the wave impedance of the waveguide constituted by the center conductor, the outer wall tube, and the insulating support portion in the extending direction of the center conductor is constant or does not have a sudden change.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, all cross sections of the insulating support portion perpendicular to the extending direction of the center conductor have the same shape.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the shape of all cross sections of the insulating support portion perpendicular to the extending direction of the center conductor is the same as the shape of all cross sections of the center conductor.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the insulating support portion includes a plurality of insulating support lines, each insulating support line is arranged in parallel, each insulating support line is parallel to the central conductor, and one continuous channel is formed between two adjacent insulating support lines.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the plurality of the insulating support lines of the insulating support portion are uniformly arranged along the circumferential direction of the outer wall pipe.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support lines is two or more than three.
The probe assembly of the coaxial type guided wave radar according to at least one embodiment of the present disclosure further includes a first fixing portion for fixing a first end of each of the insulation support lines of the insulation support portion to a first end of the center conductor or to a first end of the outer wall pipe, and a second fixing portion for fixing a second end of each of the insulation support lines of the insulation support portion to a second end of the center conductor or to a second end of the outer wall pipe.
The probe assembly of the coaxial type guided wave radar according to at least one embodiment of the present disclosure further includes a tension mechanism for tensioning the center conductor.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism includes a positioning portion, at least a part of the positioning portion is provided with an external thread at its outer periphery, the inner wall of the outer wall tube is provided with an internal thread, and the positioning portion can move along the axial direction of the outer wall tube by the cooperation of the external thread and the internal thread; the center of the positioning part is provided with a center hole, the center hole can be inserted by the second end of the center conductor, and the second end of the center conductor can be fixedly connected with the positioning part, so that the center conductor can be tensioned along with the movement of the positioning part relative to the outer wall pipe.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the tightening mechanism further includes a locking portion for locking relative positions of the outer wall pipe and the positioning portion.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the second end of the outer wall tube is provided with a positioning hole through which the locking part can pass to apply pressure to the locking part to lock the relative positions of the outer wall tube and the positioning part.
According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, one or more than two liquid inlet holes are formed in the outer wall tube, and liquid can enter the continuous channel between the central conductor and the outer wall tube through the liquid inlet holes.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the center conductor is a metal wire, and the outer wall tube is a metal tube.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the insulation support part includes at least one insulation support wire, the insulation support wire is spirally disposed between the center conductor and the outer wall tube, and the continuous channel extends spirally between the center conductor and the outer wall tube.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support wires is one.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the number of the insulating support lines is two or more than three.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, a winding angle between the insulated support wire and the center conductor is 45 to 70 degrees.
According to the probe assembly of the coaxial guided wave radar of at least one embodiment of the present disclosure, adjacent two of the insulated support wires have a space therebetween to form the continuous channel.
The probe assembly of the coaxial type guided wave radar according to at least one embodiment of the present disclosure further includes a first fixing portion for fixing a first end of each of the insulation support lines of the insulation support portion to a first end of the center conductor or to a first end of the outer wall pipe, and a second fixing portion for fixing a second end of each of the insulation support lines of the insulation support portion to a second end of the center conductor or to a second end of the outer wall pipe.
The probe assembly of the coaxial type guided wave radar according to at least one embodiment of the present disclosure further includes a tension mechanism for tensioning the center conductor.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the tensioning mechanism includes a positioning portion, at least a part of the positioning portion is provided with an external thread at its outer periphery, the inner wall of the outer wall tube is provided with an internal thread, and the positioning portion can move along the axial direction of the outer wall tube by the cooperation of the external thread and the internal thread; the center of the positioning part is provided with a center hole, the center hole can be inserted by the second end of the center conductor, and the second end of the center conductor can be fixedly connected with the positioning part, so that the center conductor can be tensioned along with the movement of the positioning part relative to the outer wall pipe.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the tightening mechanism further includes a locking portion for locking relative positions of the outer wall pipe and the positioning portion.
According to the probe assembly of the coaxial type guided wave radar of at least one embodiment of the present disclosure, the second end of the outer wall tube is provided with a positioning hole through which the locking part can pass to apply pressure to the locking part to lock the relative positions of the outer wall tube and the positioning part.
According to still another aspect of the present disclosure, there is provided a coaxial type guided wave radar including:
the probe assembly of any of the above; and the probe assembly is connected with the radar main body in a sealing mode through a sealing part.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural view of a coaxial guided wave radar according to an embodiment of the present disclosure.
Fig. 2 is a partially enlarged structural schematic diagram of an a region of the coaxial type guided wave radar of one embodiment of the present disclosure shown in fig. 1.
Fig. 3 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of the coaxial type guided wave radar of the embodiment of the present disclosure.
Fig. 4 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure.
Fig. 5 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure.
Fig. 6 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure.
Fig. 7 is a partial sectional view of a probe assembly of a coaxial type guided wave radar according to an embodiment of the present disclosure, taken along an axial direction of the probe assembly.
Description of the reference numerals
10 coaxial type guided wave radar
100 probe assembly
101 center conductor
102 outer wall pipe
103 insulating support
104 tensioning mechanism
200 radar main body
300 sealing part
1031 insulating support wire
1041 location part
1042 locking portion.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., "in the sidewall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.
Fig. 1 is a schematic structural view of a coaxial guided wave radar according to an embodiment of the present disclosure. Fig. 2 is a partially enlarged structural schematic diagram of an a region of the coaxial type guided wave radar of one embodiment of the present disclosure shown in fig. 1. Fig. 3 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of the coaxial type guided wave radar of the embodiment of the present disclosure. Fig. 4 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure. Fig. 5 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure. Fig. 6 is a schematic cross-sectional view perpendicular to the axial direction of a probe assembly of a coaxial type guided wave radar of still another embodiment of the present disclosure. Fig. 7 is a partial sectional view of a probe assembly of a coaxial type guided wave radar according to an embodiment of the present disclosure, taken along an axial direction of the probe assembly.
Hereinafter, a probe assembly of a coaxial guided wave radar and the coaxial guided wave radar according to the present disclosure will be described in detail with reference to fig. 1 to 7.
As shown in fig. 1 to 7, a probe assembly 100 of a coaxial type guided wave radar according to an embodiment of the present disclosure includes:
a center conductor 101 for guiding an electromagnetic wave generated by the coaxial type guided wave radar 10 to be emitted and guiding a returned electromagnetic wave;
the outer wall tube 102, the outer wall tube 102 is set up outside the central conductor 101, the central conductor 101 and outer wall tube 102 have the same extension direction; and the number of the first and second groups,
an insulating support 103, the insulating support 103 being made of an insulating material, the insulating support 103 being arranged between the central conductor 101 and the outer-wall tube 102 to insulate between the central conductor 101 and the outer-wall tube 102, the insulating support 103 being continuous in the direction of extension of the central conductor 101 and in the direction of extension of the outer-wall tube 102, the insulating support 103 being such that a continuous channel is formed between the central conductor 101 and the outer-wall tube 102 in the direction of extension of the central conductor 101, the continuous channel being capable of being passed through by a liquid.
The extending direction of the center conductor 101 and the extending direction of the outer wall tube 102 are the same.
In the above embodiment, the wave impedance of the waveguide including the central conductor 101, the outer-wall tube 102, and the insulating support 103 in the extending direction of the central conductor 101 is not changed or does not change abruptly.
Preferably, all the cross sections of the insulating support 103 perpendicular to the extending direction of the central conductor 101 are the same in shape.
Preferably, the shape of all cross sections of the insulating support 103 perpendicular to the extending direction of the central conductor 101 is the same as the shape of all cross sections of the central conductor 101.
The probe assembly 100 of the coaxial guided wave radar of the present disclosure redesigns the structure and the arrangement of the insulating support 103, and avoids the discontinuity of the whole waveguide impedance caused by the support of the coaxial guided wave radar in the prior art, and the probe assembly 100 of the coaxial guided wave radar of the present disclosure realizes the consistency of the wave impedance of the whole probe assembly 100 by forming the above-mentioned continuous channel, and can avoid the reflected echo generated at the support, thereby making it possible to measure the liquid with ultra-low dielectric constant/the liquid with the dielectric constant lower than the support material.
Moreover, through the structural design of the insulating support part 103 of the probe assembly 100 disclosed by the invention, the size of the outer wall pipe 102 can be below 7mm, so that the traditional high-pressure small tank body, such as a gas tank, can conveniently realize liquid level measurement.
According to a preferred embodiment of the present disclosure, the insulation support 103 of the probe assembly 100 for a coaxial type guided wave radar includes a plurality of insulation support lines 1031, each insulation support line 1031 is disposed in parallel, each insulation support line 1031 is parallel to the central conductor 101, and a continuous channel is formed between two adjacent insulation support lines 1031.
As shown in fig. 3, 4, and 5, the number of the insulating support wires 1031 may be two, three, or more than four, the cross section of the insulating support wires 1031 may be circular, elliptical, or rectangular, and the shape of the cross section of the insulating support wires 1031 is not particularly limited in this disclosure.
Preferably, the plurality of insulating support wires 1031 of the insulating support 103 of the probe assembly 100 for the coaxial type guided wave radar are uniformly arranged along the circumferential direction of the outer wall tube 102.
Preferably, the number of the insulated support wires 1031 of the probe assembly 100 of the coaxial type guided wave radar is two or more than three.
With the probe assembly 100 of the coaxial type guided wave radar of the above embodiment, it is preferable that a first fixing portion for fixing a first end of each of the insulated support wires 1031 of the insulated support portion 103 to a first end of the center conductor 101 or to a first end of the outer wall tube 102 and a second fixing portion for fixing a second end of each of the insulated support wires 1031 of the insulated support portion 103 to a second end of the center conductor 101 or to a second end of the outer wall tube 102 are further included.
In the present disclosure, the first fixing portion and the second fixing portion may be configured to have a specific structure as appropriate, and the present disclosure is not limited to the specific structure of the first fixing portion and the second fixing portion.
The fixing structures (the first fixing portion and the second fixing portion) are used to ensure that the two ends of the insulated support wire 1031 do not rotate and move.
Both ends of the insulating support wire 1031 may be fixed to the outer-wall tube 102. The fixing structure may be a hole formed in the outer wall pipe 102, through which the supporting insulated wire 1031 is passed, and then a part of the wire is passed to be locked or fixed, or the supporting insulated wire 1031 is locked or fixed by changing the outer diameter thereof by heat fusion.
Both ends of the insulating support wire 1031 may be fixed to the center conductor 101.
A hole may be formed in the supporting insulated wire 1031, the central conductor 101 may pass through the hole, and then a small section of metal tube may be sleeved on each of the two sides of the hole of the supporting insulated wire 1031, and the metal tubes may be compressed by pressure, and the outer diameter of the metal tubes is larger than that of the supporting insulated wire 1031, so as to lock the supporting insulated wire 1031 to the central conductor 101.
With respect to the probe assembly 100 of the coaxial guided wave radar of the above embodiment, it is preferable that the probe assembly 100 further includes a tensioning mechanism 104, and the tensioning mechanism 104 is configured to tension the center conductor 101.
Fig. 1 and 2 each schematically illustrate the tensioning mechanism 104.
According to the preferred embodiment of the present disclosure, the tensioning mechanism 104 of the probe assembly 100 of the coaxial guided wave radar includes a positioning portion 1041, at least a part of the positioning portion 1041 is provided with an external thread at its outer periphery, and an internal thread is provided on the inner wall of the outer-wall tube 102, so that the positioning portion 1041 can move along the axial direction of the outer-wall tube 102 by the cooperation of the external thread and the internal thread; the center of the positioning portion 1041 is provided with a center hole into which the second end of the center conductor 101 can be inserted and the second end of the center conductor 101 can be fixedly connected with the positioning portion 1041, so that the center conductor 101 can be tightened following the movement of the positioning portion 1041 relative to the outer-wall pipe 102.
According to the preferred embodiment of the present disclosure, the tension mechanism 104 of the probe assembly 100 of the coaxial type guided wave radar further includes a locking part 1042, and the locking part 1042 is used for locking the relative positions of the outer wall tube 102 and the positioning part 1041.
Preferably, the second end (lower end in fig. 1) of the outer-wall pipe 102 is provided with a positioning hole, and the locking part 1042 can pass through the positioning hole to apply pressure to the locking part 1042 so as to lock the relative positions of the outer-wall pipe 102 and the positioning part 1041.
The locking portion 1042 may be a jackscrew.
It should be understood by those skilled in the art that the extension of the locking portion 1042 in fig. 1 and 2 is only for the convenience of describing the locking portion 1042, and the locking portion 1042 may have a smaller dimension in a direction perpendicular to the wall surface of the outer-wall pipe 102, or the locking portion 1042 extends in the axial direction of the outer-wall pipe 102 and is inserted into the gap between the outer-wall pipe 102 and the positioning portion 1041 to press the positioning portion 1041 to lock the positioning portion 1041.
The probe assembly 100 for a coaxial guided wave radar according to still another embodiment of the present disclosure includes:
a center conductor 101 for guiding an electromagnetic wave generated by the coaxial type guided wave radar 10 to be emitted and guiding a returned electromagnetic wave;
the outer wall tube 102, the outer wall tube 102 is set up outside the central conductor 101, the central conductor 101 and outer wall tube 102 have the same extension direction; and the number of the first and second groups,
an insulating support 103, the insulating support 103 being made of an insulating material, the insulating support 103 being arranged between the central conductor 101 and the outer-wall tube 102 to insulate between the central conductor 101 and the outer-wall tube 102, the insulating support 103 being such that a continuous channel is formed between the central conductor 101 and the outer-wall tube 102 in the direction of extension of the central conductor 101, the continuous channel being capable of being passed through by a liquid.
Wherein the insulating support 103 comprises at least one insulating support wire 1031, the insulating support wire 1031 being arranged in a spiral manner between the central conductor 101 and the outer wall tube 102, and a continuous channel extending in a spiral manner between the central conductor 101 and the outer wall tube 102.
As shown in fig. 5, the number of the insulated support wires 1031 of the insulated support portion 103 of the probe assembly 100 for the coaxial type guided wave radar is one.
With the probe assembly 100 of the coaxial guided wave radar of the above embodiment, the number of the insulated support wires 1031 is two or three or more.
With the probe assembly 100 of the coaxial type guided wave radar of the above embodiment, it is preferable that the winding angle between the insulated support wire 1031 and the center conductor 101 is 45 to 70 degrees.
With the probe assembly 100 of the coaxial type guided wave radar of the above embodiment, it is preferable that adjacent two insulated support wires 1031 have a spacing therebetween to form a continuous channel.
The continuous passage facilitates the flow of liquid therethrough, ensuring that the liquid flows freely in the gap between the outer wall tube 102, the insulated support wire 1031, and the neutral conductor 102.
In this embodiment, the insulating support wire 1031 may be composed of a plurality of insulating support wire segments.
With the probe assembly 100 of the coaxial type guided wave radar of the above embodiment, it is preferable that a first fixing portion for fixing a first end of each of the insulated support wires 1031 of the insulated support portion 103 to a first end of the center conductor 101 or to a first end of the outer wall tube 102 and a second fixing portion for fixing a second end of each of the insulated support wires 1031 of the insulated support portion 103 to a second end of the center conductor 101 or to a second end of the outer wall tube 102 are further included.
With respect to the probe assembly 100 of the coaxial guided wave radar of the above embodiment, it is preferable that a tension mechanism 104 is further included, and the tension mechanism 104 is used to tension the center conductor 101.
For the probe assembly 100 of the coaxial guided wave radar of the above embodiment, preferably, the tensioning mechanism 104 includes a positioning portion 1041, an external thread is provided on an outer circumference of at least a part of the positioning portion 1041, an internal thread is provided on an inner wall of the outer-wall tube 102, and the positioning portion 1041 can move along an axial direction of the outer-wall tube 102 by the cooperation of the external thread and the internal thread; the center of the positioning portion 1041 is provided with a center hole into which the second end of the center conductor 101 can be inserted and the second end of the center conductor 101 can be fixedly connected with the positioning portion 1041, so that the center conductor 101 can be tightened following the movement of the positioning portion 1041 relative to the outer-wall pipe 102.
With the probe assembly 100 of the coaxial guided wave radar of the above embodiment, preferably, the tension mechanism 104 further includes a locking portion 1042, and the locking portion 1042 is used for locking the relative positions of the outer wall tube 102 and the positioning portion 1041.
In the probe assembly 100 for a coaxial guided wave radar according to the above embodiment, it is preferable that the second end of the outer tube 102 is provided with a positioning hole, and the locking portion 1042 can pass through the positioning hole to apply pressure to the locking portion 1042 to lock the relative positions of the outer tube 102 and the positioning portion 1041.
For the probe assembly 100 of the coaxial guided wave radar according to each of the above embodiments, one or more liquid inlet holes are formed in the outer wall tube 102, and liquid can enter the continuous channel between the central conductor 101 and the outer wall tube 102 through the liquid inlet holes.
For the probe assembly 100 of the coaxial type guided wave radar of each of the above embodiments, the central conductor 101 may be a wire, and the outer wall tube 102 may be a metal tube.
The center conductor 101 may be a wire and may have a diameter of 1mm to 2 mm.
The center conductor 101 may be a bent wire, preferably having elasticity. Center conductor 101 may be any conductive metal, preferably stainless steel.
The outer wall tube 102 may have a wall thickness of about 0.5mm to 2mm, or may be thicker.
The insulated support wire can be a bent insulated wire, a plastic wire can be adopted, the diameter can be 2mm-3mm, and the insulated support wire is preferably a solid plastic thin rod.
The probe assembly 100 of the coaxial guided wave radar of the present disclosure has the wave impedance of the entire coaxial waveguide consistent with each other by the arrangement of the insulating support wire 1031, and does not have a sudden change in the wave impedance and does not generate a reflected wave generated by the support member (insulating support 103).
A coaxial type guided wave radar 10 according to an embodiment of the present disclosure, as shown in fig. 1, includes: the probe assembly 100 of any of the above embodiments; and a radar main body 200, wherein the probe assembly 100 and the radar main body 200 are hermetically connected through a sealing part 300.
The microwave generated by the radar body 200 propagates through the probe assembly 100 along the central conductor 101, encounters the liquid surface, reflects, and forms an echo.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A probe assembly of a coaxial guided wave radar, comprising:
a center conductor for guiding an electromagnetic wave generated by the coaxial type guided wave radar to be emitted and guiding a returned electromagnetic wave;
the outer wall pipe is sleeved outside the central conductor, and the central conductor and the outer wall pipe have the same extension direction; and
an insulation support made of an insulating material, the insulation support being disposed between the center conductor and the outer-wall tube to insulate between the center conductor and the outer-wall tube, the insulation support being continuous along a direction of extension of the center conductor and a direction of extension of the outer-wall tube, the insulation support being such that a continuous channel is formed between the center conductor and the outer-wall tube along the direction of extension of the center conductor, the continuous channel being capable of being passed through by a liquid.
2. The probe assembly of a coaxial guided wave radar according to claim 1, wherein the wave impedance of the waveguide formed by the center conductor, the outer wall tube, and the insulating support portion in the extending direction of the center conductor is constant or does not have a sudden change.
3. The probe assembly for a coaxial guided wave radar according to claim 1 or 2, wherein all cross sections of the insulating support portion perpendicular to the extending direction of the center conductor have the same shape.
4. The coaxial guided wave radar probe assembly according to claim 1 or 2, wherein the shape of all cross sections of the insulating support perpendicular to the extending direction of the center conductor is the same as the shape of all cross sections of the center conductor.
5. The coaxial guided wave radar probe assembly according to claim 1, wherein the insulating support portion includes a plurality of insulating support lines, each insulating support line is disposed in parallel with the central conductor, and one continuous channel is formed between two adjacent insulating support lines.
6. The probe assembly for a coaxial guided wave radar according to claim 5, wherein the plurality of insulating support wires of the insulating support portion are uniformly arranged in a circumferential direction of the outer wall pipe.
7. The probe assembly of the coaxial guided wave radar according to claim 6, wherein the number of the insulated support wires is two or more than three.
8. The probe assembly of the coaxial guided wave radar according to any one of claims 5 to 7, further comprising a first fixing portion for fixing a first end of each of the insulated support wires of the insulated support portion to a first end of the center conductor or to a first end of the outer wall tube, and a second fixing portion for fixing a second end of each of the insulated support wires of the insulated support portion to a second end of the center conductor or to a second end of the outer wall tube.
9. The coaxial guided wave radar probe assembly of claim 8, further comprising a tensioning mechanism for tensioning the center conductor.
10. A coaxial guided wave radar, comprising:
the probe assembly of any one of claims 1 to 9; and
the radar main part, probe subassembly with through sealing part sealing connection between the radar main part.
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| CN202110103646.2A CN112666525A (en) | 2021-01-26 | 2021-01-26 | Probe assembly of coaxial guided wave radar and coaxial guided wave radar |
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| CN202110103646.2A CN112666525A (en) | 2021-01-26 | 2021-01-26 | Probe assembly of coaxial guided wave radar and coaxial guided wave radar |
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| CN214473901U (en) * | 2021-01-26 | 2021-10-22 | 北京锐达仪表有限公司 | Probe assembly of coaxial guided wave radar and coaxial guided wave radar |
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| US20160103006A1 (en) * | 2014-10-10 | 2016-04-14 | Rosemount Tank Radar Ab | Fmcw based guided wave radar level gauge |
| CN106197609A (en) * | 2015-04-30 | 2016-12-07 | 罗斯蒙特储罐雷达股份公司 | There are uniconductor probe radar level gauge system and the method for the tank of tubulose mounting structure |
| CN109211354A (en) * | 2017-07-05 | 2019-01-15 | 罗斯蒙特储罐雷达股份公司 | Radar level gauge system with low reflection interval part device |
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