CN217276317U - Combined sealed vortex street flowmeter probe - Google Patents
Combined sealed vortex street flowmeter probe Download PDFInfo
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- CN217276317U CN217276317U CN202221032271.1U CN202221032271U CN217276317U CN 217276317 U CN217276317 U CN 217276317U CN 202221032271 U CN202221032271 U CN 202221032271U CN 217276317 U CN217276317 U CN 217276317U
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- vortex shedding
- shedding flowmeter
- shrinkable sleeve
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Abstract
The utility model discloses a combined sealing type vortex shedding flowmeter probe, which comprises a probe shell, a core column, a piezoelectric plate, a wire harness and a heat shrinkage sleeve, wherein the core column and the piezoelectric plate are arranged in the upper part of the probe shell; the heat-shrinkable sleeve is fixedly sleeved on a wire harness, and a signal wire of the wire harness is connected with the core column and the piezoelectric sheet; the method is characterized in that: also comprises a sheath; the sheath is sleeved on the heat shrinkable sleeve, and the lower end of the sheath is fixed with the probe shell in a circumferential welding way; and sealant is filled in the gap between the sheath and the heat shrinkable sleeve. The utility model discloses both can realize exposing the position extension outsourcing and locking sealed to the pencil to prevent to wet and influence the performance of vortex shedding flowmeter probe, also can seal the equipment again after this pencil wiring simultaneously, but assemblability is good.
Description
Technical Field
The utility model relates to a vortex flowmeter field specifically is a combination sealed vortex flowmeter probe.
Background
The vortex street flowmeter (or vortex street flow meter) is a speed type flow meter which is made by using the natural vibration principle of fluid (gas or liquid) and piezoelectric crystal or differential capacitor as detection component according to the Karman vortex street theory.
And a vortex shedding flowmeter probe, which is one of the cores, converts a pressure signal of a vortex into an electrical signal (frequency signal). Then, after signal processing and calculation by circuits such as an amplifying board and an integrating instrument, the purpose of outputting and displaying the flow measurement result is finally obtained.
Referring to fig. 1-2, a conventional vortex shedding flowmeter probe comprises a probe shell (1), a core column (2), a piezoelectric sheet (3), a wire harness (4) and a heat-shrinkable sleeve (5), wherein the core column (2) and the piezoelectric sheet (3) are installed in the upper part of the probe shell (1); the thermal contraction sleeve (5) is fixedly sleeved on the wire harness (4), and a signal wire of the wire harness (4) penetrates through the thermal contraction sleeve (5) and then is connected with the core column (2) and the piezoelectric sheet (3). The upper end of the probe shell (1) is provided with an external pipe (1-4), and the heat-shrinkable sleeve (5) is inserted into the external pipe (1-4). The purpose of adopting the heat-shrinkable sleeve (5) is that the fit clearance between the wire harness (4) and the outer pipes (1-4) is extremely large due to the undersize of the outer diameter of the wire harness, and the heat-shrinkable sleeve (5) can achieve the purpose of reducing the fit clearance, but still has the problem of small clearance. Deficiencies in production and use are found to be in need of improvement:
firstly, the lower part of the heat-shrinkable sleeve (5) is inserted into the outer pipes (1-4), and the heat-shrinkable sleeve (5) is protected only by the enough length (more than 30 mm) of the outer pipes (1-4), but gaps exist between the heat-shrinkable sleeve (5) and the outer pipes (1-4), so that the sealing property is insufficient, the moisture resistance is poor, and the use in a high-temperature environment is not facilitated;
secondly, because the extension pipes (1-4) are integrated with the probe shell (1), when the signal wire of the wire harness (4) penetrates out of the heat-shrinkable sleeve (5) and then is connected with the core column (2) and the piezoelectric sheet (3), the extension pipes (1-4) are long, so that the problems of too long welding gun depth, narrow space, poor assembly, difficult observation, difficult alignment, inconvenient operation and the like exist. In addition, the longer the length of the outer pipe (1-4) is, the more difficult the assembly process is.
Thirdly, when the probe is assembled on a flowmeter or a flowmeter, the wire harness (4) needs to be externally connected, and the wire harness (4) is pulled outwards when the probe is externally connected, the heat shrinkage sleeve (5) and the outer extension pipes (1-4) can slide mutually without constraint, and the wire harness (4) is pulled outwards to loose the core column (2) and the piezoelectric sheet (3) to cause the problem of looseness in the probe shell (1).
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned defect or defect problems that exist among the prior art, the utility model provides a combination sealed vortex flowmeter probe.
In order to achieve the above object, the utility model provides a combination sealed vortex shedding flowmeter probe, which comprises a probe shell, a core column, a piezoelectric plate, a wire harness and a heat shrinkage sleeve, wherein the core column and the piezoelectric plate are arranged in the upper part of the probe shell; the thermal contraction sleeve is fixedly sleeved on a wire harness, and a signal wire of the wire harness is connected with the core column and the piezoelectric sheet; the method is characterized in that: also comprises a sheath; the sheath is sleeved on the heat shrinkable sleeve, and the lower end of the sheath is fixed with the probe shell by circumferential welding; and sealant is filled in a gap between the sheath and the heat shrinkable sleeve.
By adopting the scheme, the signal wire of the wire harness is welded with the core column and the piezoelectric sheet lead wire during assembly; then sheathing a heat-shrinkable sleeve on the sheath, and circumferentially welding, fixing and sealing the lower end of the heat-shrinkable sleeve and the probe shell; then filling sealant into a gap between the sheath and the heat shrinkable sleeve for filling and sealing; and after the sealant is solidified, the sheath and the heat shrinkable sleeve are bonded and fixed so as to limit the relative looseness between the heat shrinkable sleeve and the heat shrinkable sleeve. It has the following characteristics:
first, when the signal wire of the wire harness is welded with the core column and the piezoelectric sheet lead, because the limitation of the external extension tube of the heat shrinkable sleeve in the prior art is avoided and the sheath postwelding mode can be adopted, the wire harness has the advantages of small welding gun depth, large space air, easy observation and alignment, very convenient operation and the like during wiring.
Secondly, the sheath can be welded and connected afterwards, and the length of the sheath can not affect the signal wire welding of the wiring harness;
thirdly, as the sealant is filled in the gap between the sheath and the heat shrinkable sleeve, the whole sealing performance in the probe can be improved, the moisture resistance can be improved, and the probe is beneficial to use in a high-temperature environment;
fourthly, after the sealant is solidified, the sheath and the heat shrinkable sleeve are bonded and fixed so as to limit the relative looseness between the heat shrinkable sleeve and the heat shrinkable sleeve; therefore, when the probe is assembled on a flowmeter or an external wire of the flowmeter, the problem of looseness in the probe shell in the process of pulling the core column and the piezoelectric sheet out of the wire harness can be avoided or prevented.
Furthermore, two sealing rings are installed in the sheath at intervals; and one sealing ring positioned on the upper side is close to the upper end of the sheath, and the sealant is filled between the two sealing rings. Therefore, the sealant can be limited between the two sealing rings when being injected into the gap between the sheath and the heat shrinkable sleeve, the sealant can be prevented from being extruded into the probe shell to generate interference influence on the core column and the piezoelectric sheet, meanwhile, the two sealing rings can realize internal and external bidirectional sealing without leakage gaps, the sealing performance is improved, meanwhile, the sealant is prevented from being leaked inwards and outwards in a bidirectional manner, and the sealant leakage is particularly prevented at high temperature.
Furthermore, two sealing ring clamping grooves are formed in the inner wall of the sheath; and the two sealing rings are respectively arranged in the two sealing ring clamping grooves. The two sealing rings can be prevented from loosening.
Furthermore, the inner wall of the sheath is provided with a dilatation ring groove which is positioned between the two sealing ring clamping grooves. Not only can increase the filling volume of the sealant, but also can improve the effective thickness of the injected sealant.
Furthermore, the outer wall of the sheath is provided with a glue injection hole communicated into the expansion ring groove, and after glue injection is completed, the glue injection hole is sealed by welding or/and a plug. Therefore, the two sealing rings can be firstly installed and then the sealant is injected through the glue injection hole, and then the sealing rings are sealed by welding or/and a plug, so that the manufacturability can be improved, and meanwhile, the filling and the injecting can be better ensured.
Furthermore, the upper end face of the probe shell is provided with a convex ring, and the lower end of the sheath is inserted into the convex ring and then welded and fixed. Because the welding is carried out after the insertion positioning, the concentricity after the welding can be ensured, and the operation is more convenient.
Preferably, the sheath is made of stainless steel.
Preferably, the piezoelectric patches have two or four.
Preferably, the sealant is high-temperature-resistant glue. This allows for use in high temperature environments.
Preferably, the length of the convex ring is 5-10mm, and the length of the sheath is 30-100 mm.
The utility model discloses beneficial effect:
firstly, when the signal wire of the wire harness is welded with the core column and the piezoelectric patch lead wire, the heat shrinkable sleeve pipe has the advantages of small depth of a welding gun, large space air, easy observation and alignment, very convenient operation and the like during wiring because the limitation of an outer extension pipe of the heat shrinkable sleeve pipe in the prior art (see figures 1-2) is avoided and a sheath post-welding mode can be adopted;
secondly, the sheath can be welded and connected afterwards, so that the length of the sheath can not affect the signal wire welding of the wire harness;
thirdly, the utility model can improve the whole sealing performance inside the probe, improve the moisture resistance and facilitate the use in high temperature environment because the sealing glue is filled in the gap between the sheath and the heat shrinkable sleeve;
fourthly, the sheath is bonded and fixed with the heat shrinkable sleeve after the sealant is solidified so as to limit the relative looseness between the heat shrinkable sleeve and the heat shrinkable sleeve; therefore, when the probe is assembled on a flowmeter or an external wire of the flowmeter, the problem of looseness in the probe shell in the process of pulling the core column and the piezoelectric sheet out of the wire harness can be avoided or prevented;
fifth, the utility model discloses both can realize exposing position extension outsourcing and locking sealed to the pencil to prevent to wet and influence the performance of vortex shedding flowmeter probe, also can seal the equipment again after this pencil wiring simultaneously, but assemblability is good.
Drawings
Fig. 1 is an exploded view (semi-sectional view) of a conventional vortex shedding flowmeter probe before wiring.
Fig. 2 is a perspective view (semi-sectional view) of a conventional vortex shedding flowmeter probe after connection.
Fig. 3 is a schematic structural diagram (semi-sectional view) of a vortex flowmeter probe according to an embodiment of the present invention after wiring.
Fig. 4 is an exploded view (semi-sectional view) of a vortex shedding flowmeter probe in a second embodiment of the present invention before wiring.
Fig. 5 is an assembly view (half sectional view) of a second embodiment of the present invention, in which a stem and a piezoelectric plate are integrally assembled into a probe housing.
Fig. 6 is an exploded view (half sectional view) of the sheath, two sealing rings and the plug according to the second embodiment of the present invention when they are not assembled.
Fig. 7 is an assembly view (half sectional view) of a second embodiment of the present invention in which a wire harness is integrated with a heat shrinkable sleeve.
Fig. 8 is a half-sectional perspective view (half-sectional view) of a vortex shedding flowmeter probe when the probe is connected and assembled into an integrated assembly according to an embodiment of the present invention.
Fig. 9 is an enlarged view of fig. 8 at a.
Fig. 10 is a perspective view of a vortex shedding flowmeter probe according to an embodiment of the present invention when the probe is wired and assembled into an integrated assembly.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
the first embodiment is as follows: referring to fig. 3, the combined sealed vortex shedding flowmeter probe comprises a probe shell 1, a core column 2, a piezoelectric plate 3, a wire harness 4, a heat-shrinkable sleeve 5 and a sheath 6.
The upper part of the probe shell 1 is internally provided with a stem 2 and a piezoelectric sheet 3.
Specifically, the lower part of the probe shell 1 is provided with a flat tail 1-1, the upper part of the probe shell 1 is provided with a flange 1-2, and the flange 1-2 is provided with a plurality of connecting holes 1-3. The upper inner cavity hole of the probe shell 1.
In the embodiment, the inner cavity hole preferably has inner rectangular hole sections 1-41 and outer circular hole sections 1-42, and the inner rectangular hole sections 1-41 house the stem 2 and the piezoelectric sheet 3. Specifically, the stem 2 is rectangular in cross section. Adopt the rectangle cooperation and prevent relative rotation, can satisfy assembly and during operation direction accurate location, improve the stability of performance simultaneously.
In this embodiment, the piezoelectric sheets 3 are provided with two pieces and symmetrically attached to two sides of the stem 2.
Specifically, the gaps between the inner rectangular hole segments 1-41 and the stem 2 and the piezoelectric sheet 3 are filled with an insulating layer 9 (for example, epoxy resin, since the filling of the insulating layer 9 belongs to the prior art, it is not described in detail).
In other embodiments, four piezoelectric sheets 3 may be used.
The heat-shrinkable sleeve 5 is fixedly sleeved on the wire harness 4, and a signal wire of the wire harness 4 is in winding connection or/and welding connection with the core column 2 and the piezoelectric sheet 3.
In this embodiment, the wire harness 4 passes through the heat shrinkable sleeve 5 and is connected to the stem 2 and the piezoelectric sheet 3.
In the embodiment, the wire harness 4 has three conductive signal wires 4-1 and an insulating sheath 4-2 protecting the sheath thereof. The heat shrink sleeve 5 is applied over the insulating sleeve 4-2 during assembly. And the lower section of the wire harness 4 penetrates out of the heat-shrinkable sleeve 5, the end part of the wire harness is peeled, and then the three signal wires 4-1 are respectively welded with the core column 2 and the leads of the two piezoelectric sheets 3 one by one.
The sheath 6 is sleeved on the heat shrinkable sleeve 5, and the lower end of the sheath 6 is fixed with the probe shell 1 through circumferential welding; and a sealant 7 is filled in a gap between the sheath 6 and the heat shrinkable sleeve 5. In this embodiment, the lower end of the sheath 6 is inserted into the outer circle hole section 1-42, and the outer end of the hole of the outer circle hole section 1-42 is welded and sealed with the sheath 6.
Further, the outer wall of the sheath 6 is provided with step surfaces 6-11 for aligning with the outer ends of the holes of the cylindrical hole sections 1-42. The step surfaces 6-11 are welded with the outer ends of the orifices of the excircle hole sections 1-42 in a flush manner, so that the welding is very convenient, and meanwhile, the welding quality can be improved.
In the filling process, a proper amount of sealant 7 can be injected from the upper port of the inner hole of the sheath 6, and then the sealant is rapidly solidified after heating or hot air blowing treatment.
Preferably, the sheath 6 is made of stainless steel.
Preferably, the sealing glue 7 is a high temperature resistant glue. This allows for use in high temperature environments.
When the utility model is assembled, the three signal wires at the lower section of the wire harness 4 are welded with the core column 2 and the two piezoelectric patches 3; then sheathing a heat-shrinkable sleeve 5 on the sheath 6, and circumferentially welding, fixing and sealing the lower end of the sheath and the probe shell 1; then filling a sealant 7 into a gap between the sheath 6 and the heat shrinkable sleeve 5 for filling and sealing; and after the sealant 7 is solidified, the sheath 6 and the heat shrinkable sleeve 5 are bonded and fixed so as to limit the relative looseness between the heat shrinkable sleeve 5 and the heat shrinkable sleeve 5. It has the following characteristics:
firstly, when the signal wires of the wire harness 4 are welded with the core column 2 and the piezoelectric sheet 3, because the limitation of the external extension tubes 1-4 of the heat shrinkable sleeve 5 per se in the prior art (see fig. 1-2) is avoided and the sheath 6 postwelding mode can be adopted, the welding gun has the advantages of small depth, large space air, easy observation and alignment, very convenient operation and the like during wiring.
Secondly, as the sheath 6 can be welded and connected afterwards, the length of the sheath 6 can not cause any influence on the signal wire welding of the wiring harness 4;
thirdly, as the sealant 7 is filled in the gap between the sheath 6 and the heat shrinkable sleeve 5, the whole sealing performance of the interior of the probe can be improved, the moisture resistance can be improved, and the probe is beneficial to use in a high-temperature environment;
fourthly, after the sealant 7 is solidified, the sheath 6 and the heat shrinkable sleeve 5 are bonded and fixed so as to limit the relative looseness between the heat shrinkable sleeve 5 and the heat shrinkable sleeve 5; therefore, when the probe is assembled on a flowmeter or an external wire of the flowmeter, the problem of looseness in the probe shell 1 in the process of externally pulling the stem 2 and the piezoelectric sheet 3 by the wire harness 4 can be avoided or prevented;
fifth, the utility model discloses both can realize exposing the position extension outsourcing and locking sealed to the pencil to prevent to be affected the performance that the vortex shedding flowmeter probe was influenced by the tide, also can seal the equipment again after this pencil wiring simultaneously, but assemblability is good.
Example two: referring to fig. 4-10, this embodiment is substantially the same as the first embodiment except that:
referring to fig. 8-9, in the present embodiment, two sealing rings 8 are installed at intervals in the sheath 6.
Referring to fig. 8-9, specifically, one of the sealing rings 8 on the upper side is close to the upper end of the sheath 6, and the sealant 7 is filled between the two sealing rings 8. Therefore, the sealant 7 can be limited between the two sealing rings 8 when being injected into the gap between the sheath 6 and the heat shrinkable sleeve 5, so that the sealant 7 can be prevented from being extruded into the probe shell 1 to generate interference influence on the core column 2 and the piezoelectric sheet 3, the two sealing rings 8 can realize internal and external bidirectional sealing without leakage gaps, the sealing performance is improved, the sealant 7 is prevented from being leaked inwards and outwards in two directions, and the sealant 7 is particularly prevented from being leaked at high temperature.
Referring to fig. 4-7, further, two sealing ring clamping grooves 6-1 are arranged on the inner wall of the sheath 6; and the two sealing rings 8 are respectively arranged in the two sealing ring clamping grooves 6-1. The two seal rings 8 can be prevented from being loosened.
Referring to fig. 4-7, in addition, further, the inner wall of the sheath 6 is provided with a dilatation ring groove 6-2, and the dilatation ring groove 6-2 is located between the two sealing ring clamping grooves 6-1. The filling volume of the sealant 7 can be increased and the effective thickness of the injected sealant 7 can be increased.
Referring to fig. 9, further, the outer wall of the sheath 6 is provided with a glue injection hole 6-3 which is introduced into the expansion ring groove 6-2, and after glue injection is completed, the glue injection hole 6-3 is sealed by welding or/and a plug 6-4. Therefore, after two sealing rings are installed, the sealant 7 is injected through the glue injection hole 6-3 and then is sealed by welding or/and the plug 6-4, the manufacturability can be improved, and meanwhile, the filling and the injecting can be better ensured.
Referring to fig. 9, further, the upper end surface of the probe casing 1 is provided with a convex ring 1-5, and the lower end of the sheath 6 is inserted into the convex ring 1-5 and then welded and fixed. Because the welding is carried out after the insertion positioning, the concentricity after the welding can be ensured, and the operation is more convenient.
Preferably, the length of the convex ring 1-5 is 5-10mm, and the length of the sheath 6 is 30-100 mm.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A combined sealing type vortex shedding flowmeter probe comprises a probe shell (1), a core column (2), a piezoelectric sheet (3), a wire harness (4) and a heat shrinkage sleeve (5), wherein the core column (2) and the piezoelectric sheet (3) are installed in the upper part of the probe shell (1); the heat-shrinkable sleeve (5) is fixedly sleeved on a wire harness (4), and a signal wire (4-1) of the wire harness (4) is connected with the core column (2) and the piezoelectric sheet (3); the method is characterized in that: also comprises a sheath (6);
the sheath (6) is sleeved on the heat shrinkable sleeve (5), and the lower end of the sheath (6) is fixed with the probe shell (1) through circumferential welding; and sealant (7) is filled in a gap between the sheath (6) and the heat shrinkable sleeve (5).
2. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: two sealing rings (8) are arranged in the sheath (6) at intervals; and one sealing ring (8) positioned on the upper side is close to the upper end of the sheath (6), and the sealant (7) is filled between the two sealing rings (8).
3. A combination sealed vortex shedding flowmeter probe according to claim 2, wherein: two sealing ring clamping grooves (6-1) are formed in the inner wall of the sheath (6); and the two sealing rings (8) are respectively arranged in the two sealing ring clamping grooves (6-1).
4. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: the inner wall of the sheath (6) is provided with a capacity expansion ring groove (6-2), and the capacity expansion ring groove (6-2) is positioned between the two sealing ring clamping grooves (6-1).
5. The combination sealed vortex shedding flowmeter probe of claim 4, wherein: and the outer wall of the sheath (6) is provided with a glue injection hole (6-3) communicated into the expansion ring groove (6-2), and after glue injection is finished, the glue injection hole (6-3) is sealed by welding or/and a plug (6-4).
6. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: the upper end face of the probe shell (1) is provided with a convex ring (1-5), and the lower end of the sheath (6) is inserted into the convex ring (1-5) and then is welded and fixed.
7. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: the sheath (6) is made of stainless steel.
8. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: the piezoelectric sheets (3) are two or four.
9. The combination sealed vortex shedding flowmeter probe of claim 1, wherein: the sealant (7) is high-temperature-resistant glue.
10. The combination sealed vortex shedding flowmeter probe of claim 6, wherein: the length of the convex ring (1-5) is 5-10mm, and the length of the sheath (6) is 30-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221032271.1U CN217276317U (en) | 2022-04-29 | 2022-04-29 | Combined sealed vortex street flowmeter probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221032271.1U CN217276317U (en) | 2022-04-29 | 2022-04-29 | Combined sealed vortex street flowmeter probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217276317U true CN217276317U (en) | 2022-08-23 |
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ID=82880171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221032271.1U Active CN217276317U (en) | 2022-04-29 | 2022-04-29 | Combined sealed vortex street flowmeter probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217276317U (en) |
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2022
- 2022-04-29 CN CN202221032271.1U patent/CN217276317U/en active Active
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